Baker Hughes Investor Relations

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	U.S Rig Count	Texas Rig Count	Louisiana Rig Count	Oklahoma Rig Count

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Country:	UNITED STATES
State:	All States ALABAMA ALASKA ARIZONA ARKANSAS CALIFORNIA COLORADO CONNECTICUT DELAWARE DISTRICT OF COLUMBIA FLORIDA GEORGIA HAWAII IDAHO ILLINOIS INDIANA IOWA KANSAS KENTUCKY LOUISIANA MAINE MARYLAND MASSACHUSETTS MICHIGAN MINNESOTA MISSISSIPPI MISSOURI MONTANA NEBRASKA NEVADA NEW HAMPSHIRE NEW JERSEY NEW MEXICO NEW YORK NORTH CAROLINA NORTH DAKOTA OHIO OKLAHOMA OREGON PENNSYLVANIA PUERTO RICO RHODE ISLAND SOUTH CAROLINA SOUTH DAKOTA TENNESSEE TEXAS UTAH VERMONT VIRGINIA WASHINGTON WEST VIRGINIA WISCONSIN WYOMING	County:	All Counties	TX RR Dist:	All Districts
Both (Land & Offshore)    Land    Offshore
MMS Areas:	All MMS Areas ADAK ADAMS AFOGNAK AKUTAN AKUTAN NORTH ALAMINOS CANYON ALBATROSS BANK ALEUTIAN BASIN ALEUTIAN TRENCH ALSEK VALLEY AMCHITKA PASS AMERY TERRACE AMLIA KNOLL AMUKTA PASS ANDROS APALACHICOLA ARENA CANYON ARGUELLO FAN ASTORIA CANYON ASTORIA FAN ATKA ATTU ATWATER VALLEY BAHAMAS BAIRD INLET BAKER FAN BALANUS SEAMOUNT BALTIMORE RISE BANGOR BANKS BARKLEY CANYON BARROW BARROW CANYON BARTER ISLAND BATH BAY MARCHAND BEAR SEAMOUNT BEAUFORT BEAUFORT TERRACE BEECHEY POINT BEECHEY POINT NORTH BERING GLACIER BERING SEA BERING STRAIT BIMINI BLACK BLAKE ESCARPMENT BLAKE SPUR BLANCO SADDLE BLOCK CANYON BLOCK ISLAND SHELF BLYING SOUND BODEGA CANYON BOSSLER BOSTON BOWERS BANK BOWERS RIDGE BOWERS SEAMOUNT BRAZOS BRAZOS SOUTH BRETON SOUND BRISTOL BAY BRISTOL BAY NORTH BROWNS BANK BRUNSWICK BUSHNELL KNOLL CAMPECHE ESCARPMENT CANADA BASIN CANADA BASIN WEST CAPE BLANCO CAPE DENBIGH CAPE DISAPPOINTMENT WEST CAPE FEAR CAPE FLATTERY CAPE MENDENHALL CAPE MENDENHALL WEST CAPE NEWENHAM CAPE NEWENHAM WEST CAPE SEPPINGS CAPE SEPPINGS WEST CASCADIA BASIN CASCADIA GAP CASHES LEDGE CHAGULAK CANYON CHANDELEUR CHANDELEUR EAST CHARLOTTE HARBOR CHATHAM CHIGNIK CHINCOTEAGUE CHIRIKOF ISLAND CHIRIKOF SEAMOUNT CHUKCHI SEA COLD BAY COOS BAY COPALIS BEACH WEST CORDOVA CORPUS CHRISTI CORSAIR CANYON CRAIG CRESCENT CITY CURRITUCK SOUND DAISY BANK DALL SEAMOUNT DAYTONA BEACH DE LONG MOUNTAINS DE SOTO CANYON DEASE INLET DELGADA FAN DEMARCATION POINT DERICKSON SEAMOUNT DESTIN DOME DIXON ENTRANCE DRY TORTUGAS EAST BREAKS EAST CAMERON EAST CAMERON SOUTH EASTPORT ELY SEAMOUNT ESCANABA RIDGE ESCANABA TROUGH EUGENE ISLAND EUGENE ISLAND SOUTH EUREKA EVANS EWING BANK FALSE PASS FLAXMAN ISLAND FLAXMAN ISLAND NORTH FLORIDA MIDDLE GROUND FLORIDA PLAIN FT. PIERCE GAINSVILLE GALVESTON GALVESTON SOUTH GAMBELL GAMBELL SOUTH GARDEN BANKS GARELOI ISLAND GEORGETOWN GODDARD GOODNEWS GRAND ISLE GRAND ISLE SOUTH GREEN CANYON HAGEMEISTER ISLAND HANNA SHOAL HARRINGTON HILL HARRISON BAY HARRISON BAY NORTH HARTFORD HATTERAS RIDGE HECETA BANK HEEZEN PLATEAU HENDERSON HIGH ISLAND HIGH ISLAND EAST HIGH ISLAND EAST AND SOUTH HIGH ISLAND SOUTH HOOPER BAY HOOPER BAY WEST HOQUIAM HOWELL HOOK HOYT HILLS HUDSON CANYON HYDROGRAPHER CANYON HYMAN ICY BAY ILIAMNA JACKSONVILLE JAMES ISLAND JASPER SEAMOUNT JONES JORDAN BASIN JUNEAU KANAGA BASIN KARLUK KARO KEATHLEY CANYON KENAI KETCHICAN KEY WEST KISKA VOLCANO KLAMATH RIDGE KODIAK KODIAK EAST KOROVIN CANYON KOTZEBUE KRESTA POINT KUSKOKWIM BAY KWIGUK LANIER LIPPOLD LITTLE DIOMEDE ISLAND LLOYD RIDGE LONG BEACH LOS ANGELES LUND LUND SOUTH LYDONIA CANYON MACKENZIE CANYON MACKENZIE CANYON NORTH MAIN PASS MAIN PASS SOUTH AND EAST MANTEO MARMER MATAGORDA ISLAND MAURY DEEP MC ALINDEN SPUR MEADE RIVER MIAMI MIDDLETON ISLAND MISSISSIPPI CANYON MITROFANIA ISLAND MOBILE MONTEREY MONTEREY FAN MT. FAIRWEATHER MT. KATMAI MULLER MURRAY CANYON MUSTANG ISLAND MUSTANG ISLAND EAST NAKNEK NEW YORK NEWARK NEWPORT VALLEY NH10-02 NH18-03 NH18-05 NI09-03 NI10-04 NI10-07 NI10-08 NI10-10 NI10-11 NI19-07 NITINAT FAN NJ09-02 NJ09-09 NJ09-12 NL01-01 NL60-03 NM01-04 NM01-05 NM01-06 NM01-07 NM01-08 NM02-03 NM02-04 NM02-05 NM02-06 NM02-07 NM02-08 NM03-01 NM03-02 NM03-03 NM03-04 NM03-05 NM04-01 NM04-02 NM04-03 NM58-02 NM58-04 NM59-01 NM59-02 NM59-03 NM59-04 NM59-05 NM59-06 NM60-03 NM60-04 NM60-05 NM60-06 NM60-07 NM60-08 NN01-01 NN01-02 NN03-07 NN04-08 NN05-02 NN05-04 NN05-05 NN05-06 NN05-07 NN05-08 NN06-01 NN06-02 NN06-03 NN06-05 NN07-01 NN07-02 NN07-04 NN07-06 NN08-03 NN08-05 NN59-02 NN59-03 NN59-04 NN59-05 NN59-07 NN60-01 NN60-02 NN60-05 NO01-05 NO01-07 NO01-08 NO06-07 NO07-03 NO07-05 NO07-06 NO07-08 NO59-08 NO60-03 NO60-04 NO60-05 NO60-06 NO60-07 NO60-08 NOATAK NOME NORTH PADRE ISLAND NORTH PADRE ISLAND EAST NORTON SOUND NOYO CANYON NP01-02 NQ02-07 NR03-03 NR07-01 NR07-02 NS02-04 NS02-06 NS02-08 NS03-03 NS03-04 NS03-05 NS03-06 NS03-07 NS03-08 NS04-03 NS04-04 NS04-05 NS04-06 NS04-07 NS04-08 NS05-03 NS05-04 NS05-05 NS05-06 NS06-03 NS06-05 NS06-06 NS06-08 NS07-05 NS07-06 NS07-08 NS08-05 NS08-07 NUNIVAK ISLAND NUNIVAK ISLAND WEST OKMUK CANYON ORLANDO PARKS SEAMOUNT PATTON RIDGE PENSACOLA PERVENETS CANYON PERVENETS CANYON EAST PILLSBURY PIONEER ESCARPMENT PIONEER RIDGE POCHNOI TROUGH POINT HOPE POINT HOPE WEST POINT LAY POINT LAY WEST PORT ALEXANDER PORT ISABEL PORTLAND PORTLOCK BANK POSEY POWELL PRATT SEAMOUNT PRESIDENT JACKSON SEAMOUNT PRIBILOF CANYON PRIBILOF CANYON WEST PRINCE RUPERT PROVIDENCE PULLEY RIDGE RANKIN RAT ISLANDS REDDING RICHARDSON HILLS ROCKY MOUNT ROMPIDAS LEDGE RUDE CANYON RUSSELL SABINE PASS SABINE PASS - LA SALEM SALISBURY SAMALGA ISLAND SAN CLEMENTE ISLAND SAN DIEGO SAN FRANCISCO SAN LUIS OBISPO SANTA ANA SANTA CRUZ SANTA MARIA SANTA ROSA SANTA ROSA ISLAND SAULSBURY SAULSBURY WEST SAVANNAH SEATTLE SEGUAM SELAWIK SELDOVIA SEWARD SHEMYA ISLAND SHIP SHOAL SHIP SHOAL SOUTH SHISHMAREF SHUMAGIN BANK SIGSBEE ESCARPMENT SIMEONOF ISLAND SIRIUS SEAMOUNT SITKA SOLIVIK ISLAND SOLOMON SOUTH MARSH ISLAND SOUTH MARSH ISLAND NORTH SOUTH MARSH ISLAND SOUTH SOUTH PADRE ISLAND SOUTH PADRE ISLAND EAST SOUTH PASS SOUTH PASS SOUTH AND EAST SOUTH PELTO SOUTH TIMBALIER SOUTH TIMBALIER SOUTH SOUTHEAST CAPE ST. GEORGE ST. GEORGE CANYON ST. GEORGE EAST ST. LAWRENCE ST. MATTHEW ST. MATTHEW CANYON ST. MATTHEW NORTH ST. MATTHEW SOUTH ST. MATTHEW WEST ST. MICHAEL ST. PAUL ST. PAUL EAST ST. PAUL NORTH ST. PAUL SPUR ST. PETERSBURG STEEL VENDOR SEAMOUNT STEPOVAK BAY STETSON MESA STEWART STUDDS SUMDUM SUR CANYON SURVEYOR SEACHANNEL SUTWIK ISLAND TANEY SEAMOUNT TARPON SPRINGS TAYLOR TELLER TESHEKPUK THE ELBOW THE RAMPART THOMPSON SEAMOUNT TIBBET TILLAMOOK SEACHANNEL TISON TORTUGAS VALLEY TRINITY ISLANDS UCHUPI UGASHIK UGASHIK WEST UKIAH UKIVOK ULM PLATEAU UMNAK UNALAKLEET UNALASKA UNIMAK SEAMOUNT VANCE SEAMOUNT VANCOUVER VEATCH CANYON VELERO BASIN VERMILION VERMILION SOUTH VERNON BASIN VIOSCA KNOLL WAINWRIGHT WALKER CAY WALKER RIDGE WALLS KNOLL WEED WEST CAMERON WEST CAMERON SOUTH WEST CAMERON WEST WEST DELTA WEST DELTA SOUTH WEST PALM BEACH WESTFALL SEAMOUNT WILMINGTON WILMINGTON CANYON WILMINGTON VALLEY WITTMAN WRAIGHT YAKUTAT ZHEMCHUG CANYON ZHEMCHUG SPUR	Basin:	All Basins ARDMORE WOODFORD ARKOMA WOODFORD BARNETT CANA WOODFORD DJ-NIOBRARA EAGLE FORD FAYETTEVILLE GRANITE WASH HAYNESVILLE MARCELLUS MISSISSIPPIAN PERMIAN UTICA WILLISTON OTHER
Water Depth:	min  max	Operator:	All Operators 101 ENERGY CORP 3 T EXPLORATION 3-M ENERGY CORP. 3-M ENERGY CORPORATION 38 OIL & GAS LLC 3D RESOURCES, LLC 7711 CORPORATION 7711 OPERATING COMPANY, LLC A & A PRODUCTION, INC. A & A TANK TRUCK CO. A AND V OPERATING CO. A. D. OPERATING A. O. E. OPERATORS, INC. A.M.A. CHILES A.O.E. OPERATORS, INC. AARON OIL COMPANY AARON OIL COMPANY, INC. AB RESOURCES PA, LLC ABA ENERGY ABA ENERGY CORPORATION ABACO OPERATING ABACO OPERATING, LLC ABARTA, INC. ABERCROMBIE ENERGY LLC ABRAXAS PETROLEUM ABRAXAS PETROLEUM CORPORATION AC EXPLORATION AC EXPLORATION LLC ACME ENERGY SERVICES, INC. ACME OIL TOOL CO INC ACME PRODUCTION ACOCK ANAQUA, LP ACOCK ENGINEERING ACOCK/ANAQUA OPERATING CO., LP ADAMS RESOURCES & ENERGY ADDISON OIL, LLC ADEXCO ADEXCO LTD. ADKINS, R. L. CORP. ADM (ARTHUR DANIELS MIDLAND COMPANY) ADVANCED ENERGY SERVICES ADVENTURE EXPLORATION PARTNERS, LLC AEGIS FLUIDS MANAGEMENT, LLC (TX) AEON ENERGY CORPORATION AEXCO AEXCO PETROLEUM AEXCO PETROLEUM, INC. AF OPERATING, LLC AGAPE ENERGY ALLIANCE, LLC AGGIETECH OIL, LTD. AGHORN ENERGY INC. AGRICULTURAL ENERGY SERVICES, INC. AGV CORPORATION AHUJA HOLDINGS, INC. AINSWORTH OPERATING COMPANY (OR) AIR LIQUIDE AMERICA CORP. AIX ENERGY, INC. AKA ENERGY GROUP, LLC AKERMAN DRILLING, INC. AKG COMPANY AKG OPERATING COMPANY ALAMO PERMIAN RESOURCES, LLC ALAMO PETROLEUM ALBEMARLE CORPORATION ALDRIDGE OPERATING COMPANY, LLC ALFRED C.GLASSELL,JR ALICE ENVIRONMENTAL SERVICES, LP ALICE-SIDNEY OIL CO. ALINET CORPORATION ALLEGRO INVESTMENTS, INC. ALLEGRO OIL AND GAS ALLEN PETROLEUM ALLIANCE PETROLEUM CORP. ALLIED OPERATING TEXAS, LLC ALLSTATE ENERGY CORPORATION ALMA ORINGDERFF OIL COMPANY ALPAR RESOURCES ALPHA ENERGY OPERATING, LLC ALPHA SHALE RESOURCES, LP ALPINE ENERGY CORPORATION ALPINE EXPLORATION COMPANIES, INC. ALPINE GAS CO. ALPINE INC. ALPINE PETROLEUM ALTA MESA RESOURCES LP ALTA NATURAL RESOURCES, LLC ALTA RESOURCES, LLC ALTAROCK ENERGY, INC. ALTEX ENERGY CORPORATION ALTEX RESOURCES INC ALTOS ENERGY & EXPLORATION, LLC AMADEUS ENERGY LTD. AMARILLO EXPLORATION, INC. AMBASSADOR PETROLEUM, INC. AMEREX CORPORATION AMERICAN DISPOSAL SERVICES, LTD. AMERICAN EAGLE ENERGY CORPORATION AMERICAN ENERGY AMERICAN ENERGY ASSOCIATES INC. AMERICAN ENERGY OPERATIONS, INC. AMERICAN ENERGY SOURCES, INC. AMERICAN OIL & GAS COMPANY AMERICAN OIL & GAS, INC. (CO) AMERICAN SHORELINE AMERICAN SHORELINE, INC. AMERICAN WARRIOR INC AMERICAN WARRIOR INC - US - US AMERICAN WARRIOR INC. AMERICO ENERGY RESOURCES, LLC AMERISTATE EXPLORATION AMERITECH OIL AND GAS CORP AMERRIL ENERGY, LLC AMERROYAL ENERGY, LLC AMES OIL AND GAS AMEXCO, LLC AMINEX USA, INC. AMP Resources AMRICH ENERGY, INC. AMTEX ENERGY INC. AMTEX ENERGY, INC. AMVEST COMPANY ANADARKO ANADARKO PETROLEUM CORPORATION ANAQUA OIL AND GAS ANATEXAS OFFSHORE, INC. ANCHOR BAY PETROLEUM, LLC ANDALUCIA OIL COMPANY ANDERSON ENERGY, INC. ANDERSON OIL CO ANDERSON OIL LTD. ANDERSON OIL LTD. (HOUSTON, TX) ANDERSON OPERATING, LLC ANDREW ALAN EXPLORATION ANGEL ROSE ENERGY, LLC ANGLO-DUTCH ENERGY LLC ANGLO-DUTCH ENERGY, LLC ANGLO-DUTCH PRODUC. ANGLO-SUISSE OFFSHORE PARTNERS, LLC ANKOR E & P HOLDINGS CORPORATION ANKOR ENGERY, LLC ANLOC, LLC ANNAROCK PETROLEUM, LLC ANSBRO PETROLEUM ANSCHUTZ ANTELOPE ENERGY COMPANY, LLC ANTERO ENERGY, LLC ANTERO RESOURCES ANTERO RESOURCES BLUESTONE, LLC ANTERO RESOURCES CORPORATION ANTERO RESOURCES CORPORATION - US ANTLE OPERATING, INC. ANTLE OPERATING, INC. - US AOG, INC. AOG, Inc. APACHE APACHE CORP./TULSA APACHE CORPORATION APACHE ENERGY CORPORATION APEX APEX OIL & GAS, INC. APEX SUPPLY, INC APOLLO ENERGIES, INC. APOLLO ENERGY APOLLO ENERGY OPERATING COMPANY, LP APOLLO OPERATING, LLC APPALACHIAN POWER COMPANY APPALOOSA OPERATING COMPANY, LLC APPROACH OPERATING APPROACH OPERATING, LLC APPROACH OPERATING, LLC - US AQUA-OIL, INC. ARABELLA PETROLEUM COMPANY, LLC ARABIE, INC. ARANSAS RESOURCES, INC. ARCADIA ENERGY, LLC ARCADIA EXPLORATION AND PROD ARCADIA EXPLORATION AND PRODUCTION COMPANY ARCADIA OIL COMPANY ARDEN ENERGY PARTNERS, INC. ARENA DRILLING COMPANY ARENA OFFSHORE ARENA OFFSHORE, LLC ARENA OIL & GAS ARENA RESOURCES LLC ARENA RESOURCES, INC. ARENA RESOURCES, INC. - US - US ARENA RESOURCES, LLC ARES ENERGY, LTD. ARG RESOURCES, INC. ARGENT ENERGY TRUST ARIANA ENERGY, LLC ARIES OPERATING, LP ARK-LA-TEX ENERGY ARK-LA-TEX ENERGY, LLC ARKANSAS PRODUCTION SERVICES, LLC ARLINGTON STORAGE COMPANY, LLC ARMOR PETROLEUM INC. ARMSTRONG COOK INLET, LLC ARMSTRONG ENERGY CORPORATION ARMSTRONG LOUISIANA, LLC ARMSTRONG OPERATING ARMSTRONG OPERATING, INC. ARMSTRONG PET. CORP. ARNOLD OIL PROPERTIES ARNOLD OIL PROPERTIES, LLC ARP OKLAHOMA, LLC ARRINGTON CJM, INC. ARRINGTON OIL & GAS, INC. ARRINGTON OIL CO. ARRINGTON, DAVID O AND G ARROW OIL AND GAS INC ARROW OIL AND GAS LLC ARROWHEAD ENERGY, INC. ARSENAL ENERGY USA, INC. ARTEX OIL & GAS ARTEX OIL AND GAS ARUBA PETROLEUM, INC. ARUBA PETROLEUM, INC. - US - US ASCENT ENERGY ASHER RESOURCES ASM OIL & GAS COMPANY, INC. ASPECT ENERGY ASPECT RESOURCES, LLC ASPEN EXPLORATION ASPEN EXPLORATION INC. ATCHLEY RESOURCES, INC. ATERRA EXPLORATION, LLC ATHLON ENERGY ATINUM PARTNERS ATLANTIC AND GULF WEST ATLANTIC OIL AND GAS ATLANTIC OIL CO ATLANTIC OPERATING, INC. ATLAS AMERICA ATLAS AMERICA INC. ATLAS AMERICA INC. - US ATLAS BARNETT, LLC ATLAS ENERGY LTD. ATLAS ENERGY RESOURCES, LLC ATLAS RESOURCES, INC. ATOKA OPERATING ATOKA OPERATING INC. ATOKA OPERATING INC. - US ATOKA PIPELINE CORP. ATP OIL & GAS ATROPOS EXPLORATION ATROPOS EXPLORATION COMPANY ATROPOS PRODUCTION CORPORATION ATWOOD OCEANICS AUBURN OPERATING COMPANY, LLC AUBURN OPERATING LLC-MIDLAND AURORA ENERGY, LTD. AURORA MINERALS, INC AURORA POWER RESOURCES, INC. AURORA RESOURCES CORPORATION AUS-TEX EXPLORATION INC. AVALON EXPLORATION AVALON EXPLORATION, INC. AVRA OIL AWP OPERATING COMPANY AXIA ENERGY, LLC AXIO NATURAL RESOURCES AXIOM ENERGY LLC AXIS ENERGY AXIS ENERGY CORPORATION AXIS ONSHORE, LLC AXIS ONSHORE, LP AZIMUTH ENERGY Alliance Petroleum Corp. Arena Resources, Inc. B & B OPERATING, LP B & H DISPOSAL SYSTEMS, LLC B & J VACUUM TANK SERVICE, INC. B & L EXPLORATION, LLC B & W OPERATING B & W OPERATING, LLC B AND B DLG.,INC. B AND D WELL SERVICES, INC. B AND D WELL SVC. INC. B AND E DRILLING B AND E EXPLORATION, INC. B AND E Exploration Inc. B AND W DRILLING B AND W OPERATING, LLC B C OPERATING B C OPERATING, INC. B. C. OPERATING, INC B. D. DEANS, LLC B. P. PRODUCTIONS, INC. B. R. POLK B. RICE DRILLING, LLC B.P. PRODUCTIONS, INC. B.W.O.C., INC. BAAY OIL, LLC BACH OIL PRODUCTION BACHTELL OIL & GAS BADGER ENERGY, LLC BADGER OIL BAGBY ENERGY, LLC. BAKER ENERGY INC. BAKER OPERATING, INC. BAKERWELL, INC. BALLANTYNE OIL CO. BALLANTYNE OIL COMPANY BALLARD BALLARD EXPLORATION BALLARD PETROLEUM HOLDING, LLC BANDERA DEVELOPMENT GP, LLC BANDERA DRILLING BANDS COMPANY, INC. BANKERS PETROLEUM US INC BANNER OPERTING, LLC BANNER OPERTING, LLC (TX) BARLINE OIL COMPANY BARLINE OIL, LLC BARNES OIL & GAS, LLC BARNES RESOURCES BARNETT ENERGY BARON EXPLORATION CO BARON EXPLORATION COMPANY, INC. BARRETT BROTHERS OIL AND GAS BARRETT BROTHERS OIL AND GAS, INC. BARRON OPERATING, LLC BARROW SHAVER RESOUR BARROW SHAVER RESOURCES BARROW-SHAVER RESOURCES COMPANY BARTON OIL AND GAS CO. BASA RESOURCES, INC. BASELINE OIL & GAS CORPORATION BASF BASIC ENERGY SERVICES, INC. BASIC ENERGY SERVICES, INC. (TX) BASIN RESOURCES BASS ENERGY BASS ENERGY COMPANY, INC. BASS ENTERPRISES BASS ENTERPRISES P BASSI, AL BATEMAN'S BAY EXPLORATION, INC. BATTELLE MEMORIAL INSTITUTE BAY EXPLORATION BAY PETROLEUM CORPORATION BAY ROCK OPERATING BAY ROCK OPERATING COMPANY BAY-TECH OPERATING CO., INC. BAYHORSE PETROLEUM, LLC BAYLESS DRLG CO BAYOU BEND OFFSHORE LTD. BAYOU CITY EXPLORATION, INC. BAYS EXPLORATION BAYSHORE EXPLORATION BAYSHORE EXPLORATION, LLC BAYSHORE OPERATING CORP., LLC BAYSWATER EXPLORATION & PRODUCTION, LLC BAYTEX ENERGY USA, LTD. BBX OPERATING, INC. BBX OPERATING, LLC BC&D OPERATING, INC. BD PRODUCTION COMPANY, INC. BEACH BEACH EXPLORATION, INC. BEAN RESOURCES, INC. BEAR MOUNTAIN RESOURCES, LLC BEAR OIL & GAS, INC. BEARCAT DRILLING, LLC BEARD OIL COMPANY BEASLEY OIL COMPANY, INC. BECKER OIL CORPORATION BECKHAM RESOURCES, INC. BECKMAN WELL SERVICE BEE-JAY PETRO, INC. BEHM ENERGY BEHM ENERGY, INC. BELDEN AND BLAKE CORP BELDEN AND BLAKE(OHIO) BELLAIRE OIL COMPANY BENCHMARK OIL & GAS COMPANY BENCHMARK OIL CORP BEND PETROLEUM CORPORATION BENGALIA LAND AND CATTLE COMPANY BENNETT PRODUCTION COMPANY BENSON AND SCHOEN OIL COMPANY, INC. BENSON MINERALS GROUP BENSON-MONTIN-GREER DRILLING CORP. BENT OAK ENERGY INTERESTS, LLC BENTLEY FAMILY, LP BENTLEY OIL AND GAS COMPANY BEPCO OPERATING CO. BEPCO Operating Co. BEPCO, LP BERCO RESOURCES, INC BEREXCO, INC. BERKSHIRE HOLDINGS, LLC BERKSHIRE OPERATING, LLC BERKSHIRE WOODLAWN FIELD LLC BERNAL OIL & GAS, INC. BERRY ENERGY CONSULT BERRY ENERGY CONSULTANTS & MGRS., INC. BERRY OIL COMPANY BERRY PETR CORP BERRY PETROLEUM BERRY PETROLEUM COMPANY BERRY PETROLEUM CORPORATION BERYL OIL AND GAS, LP BEST PETRO.EXP.,INC. BEST PETROLEUM EXPLORATION, INC. BESTO OIL & GAS, INC. BETRO, INC. BETSEY PETROLEUM BETSY PRODUCTION COMPANY, INC. BETTIS, BOYLE AND STOVALL, INC. BETTIS,BOYLE AND STOVALL BEXCO OPERATING INC. BFP BLACK CANYON, LLC BHP BI-PETRO, INC. BIG K ENERGY CORPORATION BIG RUN PRODUCTION CO. BIG SHELL OIL & GAS COMPANY, INC. BIG STAR DRILLING BIG STAR OIL & GAS BIG STAR OIL & GAS, LLC BIJOE DEVELOPMENT, INC. BILL BARRETT BILL BOWMAN OIL COMPANY BINGER OPERATIONS, LLC BISHOP PETROLEUM BISHOP PETROLEUM, INC. BISON BISON EXPLORATION DRILLING 1, LP BISSELL OPERATING, LLC BLACK AND BLACK OIL CO BLACK BAYOU STORAGE, LLC BLACK BRUSH OIL & GAS BLACK CREEK BLACK CREEK DRILLING, INC. BLACK DIAMOND MINERALS, LLC BLACK DIAMOND OIL BLACK DIAMOND OIL, INC. BLACK DIAMOND OIL, INC. (KS) BLACK ELK ENERGY LAND OPERATIONS, LLC BLACK ELK ENERGY OFFSHORE OPERATIONS, LLC BLACK HILLS CORPORATION BLACK HILLS EXPLOR AND PROD. BLACK HILLS EXPLORATION BLACK HILLS EXPLORATION AND PRODUCTION BLACK ISLAND RESOURCES USA, INC. BLACK PEARL EXPLORATION, LLC BLACK POOL ENERGY, LP BLACK STONE HOLDINGS PARTNERSHI BLACK STRATA, LLC BLACKBIRD CO. BLACKBIRD OIL & GAS, LLC BLACKBRUSH ENERGY GROUP BLACKHAWK PRODUCTION COMPANY BLACKSTONE OIL CO. BLACKWELL OPERATING BLAIK, R. E., INC. BLAIR EXPLORATION, INC. BLAKE DRLG. AND EXPLO. BLAKE EXPLORATION, LLC BLAKE PRODUCTION COMPANY, INC. BLAKEENERGY OPERATING, LLC BLEACH TECH, LLC BLOCK T PETROLEUM INC. BLOCK T PETROLEUM, INC. BLUE AND GRAY FIELD MT BLUE CHIP OIL, INC. BLUE DOLPHIN BLUE DOLPHIN PRO, LLC BLUE DOLPHIN PRODUCTION, LLC BLUE DUCK SWD, LLC BLUE OIL, INC. BLUE RIDGE PETROLEUM CORPORATION BLUE RIDGE RESOURCES, LLC BLUE STAR BLUE TIP CASTLEGATE, INC. BLUE TIP ENERGY BLUE WING ENERGY, INC. BLUEGRASS ENERGY, INC. BLUESTEM ENERGY HOLDINGS, LLC BLUESTONE NATURAL RESOURCES BNK PETROLEUM INC. BNP PETROLEUM CORP BOAZ ENERGY, LLC BOB PHILLIPS BOB RUST EXPLORATION COMPANY BOBCAT RESOURCES, LLC BOCOR HOLDINGS LLC BOGGS NATURAL GAS CO. BOGO ENERGY CORP. BOHANNAN, CAL DRLG C BOIS D'ARC BOIS D'ARC EXPLORATION, LLC BOLD ENERGY BOLD ENERGY II BOMMER ENGINEERING BONANZA CREEK ENERGY INC. BONANZA CREEK ENERGY OPERATING COMPANY BONANZA CREEK ENERGY RESOURCES, LLC BONANZA CREEK OIL BOP WEST, LLC BOPCO LP BORDERS EXPLORATION, LLC BOSQUE DISPOSAL SYSTEMS, LLC BOSS EXPLORATION AND PRODUCTION BOULDER ENERGY PARTNERS LLC BOWDEN ENERGY COMPANY, INC. BOWIE DRLG CO BOWIE, INC. BOWLES PROPERTIES BOWMAN OIL COMPANY BOYD AND MCWILLIAMS BOYD AND MCWILLIAMS ENERGY GROUP, INC. BOYD AND MCWILLIAMS ENERGY GROUP, INC. - US BP BP OPERATING COMPANY, LLC BRA-DE OIL COMPANY BRACKEN ENERGY CO. BRADEN EXPLORATION, LLC BRAHMAN OPERATING, LLC BRAMMER ENGINEERING BRAMMER ENGINEERING, INC. BRAMMER OPERATING COMPANY, LLC BRANTA PRODUCTION COMPANY, LLC BRAYTON OPERATING CO. BRC OPERATING COMPANY, LLC BRECK OPERATING BRECK OPERATING CORPORATION BREITBURN ENERGY BREITBURN ENERGY - US - US - US BREITBURN ENERGY PARTNERS, LP BREITBURN OPERATING LP BRETON ENERGY, LLC BRG ENERGY, INC. BRG PETROLEUM CORP BRIDAS ENERGY USA BRIDAS ENERGY USA, INC. 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BURK ROYALTY COMPANY, LTD. - US BURLESON AND HUFF BURLESON PETROLEUM, INC. BURLESON, L.B., INC. BURLINGTON RESOURCES O AND G CO BURNETT OIL CO INC BURNETT OIL CO INC (TX) BURNETT OIL CO INC (TX) - US - US BURNETT OIL COMPANY BURNETT OIL COMPANY, INC. (PA) BURNSED OIL COMPANY, INC. BVX OPERATING, INC. BWOC BYRD OPERATING BYRD OPERATING COMPANY BYRNE OIL COMPANY Benco Operating Company, Inc. Beowawe Power Black Pool Energy, LP Black Pool Energy, LP Blake Exploration, LLC Blake Exploration, LLC Bronco Drilling C & B OPERATING, INC. C & E OIL COMPANY C & E OPERATORS C AND E OPERATORS C AND F PETROLEUM C B MONCREIF C E OPERATING LLC. C G OIL, LLC C O & G PRODUCTION GROUP, LLC C. B. RUST OIL COMPANY C. F. QUALIA OPERATING C. W. RESOURCES C.F. QUALIA OPERATING C.W. RESOURCES CABA, LLC CABAL ENERGY CORP CABOT OIL & GAS CACTUS DRILLING COMPANY, LLC CACTUS DRLG. COMPANY CADDO MANAGEMENT CADE Drilling CADEVILLE GAS STORAGE, LLC CAERUS KANSAS LLC CAERUS OIL AND GAS LLC CAIRN ENERGY USA, INC. 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CAPITOL OIL CORP CAPITOL OIL CORPORATION CAPITOL OIL CORPORATION - US CAPSTAR DRILLING CAPSTONE NATURAL RESOURCES, LLC CARBON MANAGEMENT INSTITUTE CARDINAL EXPLORATION & PRODUCTION CARDINAL GAS STORAGE PARTNERS CARDINAL OIL, LLC CARDINAL WELL SERV. CARGILL, INC. CARMEN L. GINTHER CARMEN SCHMITT CARR EXPLORATION CARR RESOURCES CARRIZO (MARCELLUS), LLC CARRIZO OIL & GAS CARTER EXPLORATION & PRODUCTION, LLC CARTER EXPLORATION COMPANY CARUTHERS PRODUCING CASCADE PETROLEUM, LLC CASILLAS PETROLEUM CORPORATION CASKIDS OPERATING CASTELLI EXPLORATION INC CASTELLI EXPLORATION, INC CASTEX ENERGY CASTEX ENERGY, INC. CASTEX ENERGY, INC. - US - US CASTEX OFFSHORE, INC. CASTEX OFFSHORE, LLC CASTLE EXPLORATION CO. CASTLE MINERALS CASTLE RESOURCES CASTLE RESOURCES, INC. CATHEXIS OIL & GAS, LLC CATTLEMAN'S OIL OPERATIONS CATTLEMENS OIL OPERATIONS CAULKINS OIL CO CAVALRY RESOURCES, LLC CAYCE OPERATING CORPORATION CAYLEY GEOTHERMAL INC. CAZA OPERATING, LLC CB ENERGY, L.L.C. CB MONCREIF CBL RESOURCES, LLC CDX GAS CDX-DART DRILLING AND TECH CE OPERATING COMPANY, LLC. CEC DRLG CO CEC OPERATIONS, LLC CECIL WHITE OPERATING CEDAR OIL COMPANY CEI PETROLEUM, INC. CEJA CEJA CORP. CEL PROPERTIES, LLC CELERO ENERGY II, LP CELERON OIL AND GAS CO CENCO OIL CENCO, INC. CENTAUR PETROLEUM CENTERPOINT ENERGY-MRT CENTEX ENERGY, LLC CENTRAL BASIN OIL INVESTMENTS, INC. CENTRAL NEW YORK OIL & GAS CENTRAL NEW YORK OIL AND GAS CENTRAL OPERATING CENTRAL OPERATING, INC. CENTRAL OPERATING, INC. - US CENTRAL RESOURCES, INC. CENTRAL VALLEY GAS STORAGE, LLC CENTREX OPERATING COMPANY CENTURION EXPLORATION COMPANY CENTURION OIL INC. CENTURY CENTURY DRILLING CENTURY ENERGY CENTURY EXPLORATION NEW ORLEANS, INC. CENTURY OIL AND GAS CENTURY OPERATING CENTURY PET. DRLG. CENTURY PETROLEUM DRILLING CENTURY PROD., INC. CENTURY PRODUCTION, INC. CEP MID-CONTINENT, LLC CFO, INC. CG OPERATING, INC. CH4 ENERGY II, LLC CHACO ENERGY COMPANY CHALKER CHALLENGER TEXAS ENERGY OPERATIONS, LLC CHAMA OIL AND MINERALS, LLC CHANCE PROPERTIES COMPANY CHANDLER ENERGY LLC CHAPARRAL ENERGY CHAPARRAL SERV AND SPLY CHAPCO DRILLING CHAPCO, INC. CHAPPAREL DRLG. CO. CHARLES N. GRIFFIN CHARRO OPERATING CHARRO OPERATING, LLC CHARTER ENERGY, INC. CHARTER OAK PRODUCTIONS CO LLC CHEROKEE OPERATING CO. CHESAPEAKE CHESNUT OIL & GAS, INC. CHESTNUT PETROLEUM CHESTNUT PETROLEUM INC. CHESTNUT PETROLEUM, INC. CHESTNUT RIDGE STORAGE, LLC CHEVEROO OPERATING CHEVRON U.S.A., INC. CHEVRONTEXACO CHEYENNE PETROLEUM COMPANY CHI OPERATING CHIEF DRILLING COMPANY, INC. CHIEF OIL & GAS CHIEF OIL AND GAS LLC CHIEF OIL AND GAS LLC - US CHIEF OPERATING, LLC CHIEFTAIN OIL COMPANY, INC. CHIMNEY SWEEP OIL & GAS COMPANY CHINN EXPLORATION CHINN EXPLORATION COMPANY- US CHIRENO DISPOSAL, LLC CHISHOLM EXPLORATION CHISHOLM OPERATING, INC. CHISOS OPERATING INC CHISOS, LTD. CHOICE EXPLORATION, INC. CHOLLA PETROLEUM, INC. CHOLLA RESOURCES INC CHRISTIAN INC CHROMA OPERATING, INC. CICO OIL AND GAS CIG RESOURCES COMPANY CIMAREX CIMAREX ENERGY CIMARRON ENERGY CORP. CIMARRON ENGINEERING CORPORATION CIMARRON PETROLEUM LTD. CINCO NATURAL RESOURCES CORPORATION CINOCO PRODUCTION COMPANY, INC. CIRCLE STAR ENERGY CORP. CIRQUE RESOURCES, LP CIRRUS PRODUCING CO CIRRUS PRODUCTION CO CISCO OPERATING, LLC CITATION ENERGY CORP CITATION OIL & GAS CITATION OIL AND GAS CORP CITATION OIL AND GAS CORP - US CITORI OIL COMPANY CJ ENERGY, LLC CJM ARRINGTON, INC. CLARENCE SHERMAN CLARK ENERGY CLASSIC DRILLING COMPANY, INC. CLASSIC OIL AND GAS CLASSIC OPERATING COMPANY CLAY A. MUEGEE CLAYTON WILLIAMS ENERGY CLEAR CREEK, LLC CLEAR FORK, INC CLEAR FORK, INC - US CLEAR WATER, INC. CLEARFORK INC CLEARFORK OPERATING, LLC CLEARFORK RESOURCES, LLC CLEARWATER ENERGY INC. CLEARY EXPLORATION CLEARY PETROLEUM CORPORATION CLEARY,W.B.,PET. CO. CLK ENERGY PARTNERS LLC CLOVELLY EXPLORATION CLOVELLY OIL CO. INC. CML EXPLORATION LLC CMR ENERGY CMS ENERGY CMX OF KANSAS CMX, INC. CMX, INC. - US CNX ENERGY CNX GAS COMPANY, LLC CNX GAS CORPORATION CO ENERGY COASTAL CAVERNS, INC COASTAL DRILLING COASTAL PLAINS DISPOSAL #1, LLC COASTAL PLAINS ENERGY COASTAL PLAINS ENRGY COASTAL PLAINS EXPLORATION, LLC COASTLINE EXPLORATION COBALT ENERGY, LLC COBALT INTERNATIONAL ENERGY, LP COBRA DRILLING, INC COBRA OIL & GAS COBRA OIL & GAS CORPORATION COBRA OIL & GAS CORPORATION (TX) COBRA OIL AND GAS CO COBRA OPERATING COMPANY COBRA PETROLEUM PRODUCTION CORP. COBRA RESOURCES COBRA RESOURCES, LLC COFFMAN AND TEMPLE COG OPERATING LLC COG OPERATING LLC - US - US COG PRODUCTION, LLC COHOCTON VALLEY NATURAL GAS STORAGE COLDREN OIL & GAS COMPANY COLEMAN OIL & GAS COLEMAN OIL AND GAS COLLINS & YOUNG OPERATING, LLC COLLINS AND WARE, INC. COLTON LLC COLUMBIA GAS AND DEVLP COLUMBIA GAS TRANSMISSION COLUMBIA GAS TRANSMISSION CORP COLUMBIA GAS TRANSMISSION CORP. COLUMBIA GAS TRANSMISSION CORP. - US COLUMBUS ENERGY, LLC COMANCHE DRILLING COMPANY COMANCHE DRLG CO COMANCHE RESOURCES COMBINED RESOURCES COMMON DISPOSAL, LLC COMMON RESOURCES, LLC COMPLETE VACUUM AND RENTAL, LLP COMSTOCK OIL & GAS COMSTOCK RESOURCES, INC. CONCHO OILFIELD SERVICE & OPERATING COMPANY CONCORD OPERATING CONCORDIA RESOURCES INC. CONE AND PETREE OIL AND GAS EXPLORATION, INC. CONN ENERGY, INC. CONOCOPHILLIPS CONOCOPHILLIPS COMPANY CONQUEST EXPLORATION CONQUEST EXPLORATION - OMAN CONQUEST OIL COMPANY CONSOL ENERGY CONSOL.RES. AMERICA CONSUMERS ENERGY COMPANY CONTANGO OIL & GAS COMPANY CONTANGO OPERATORS, INC. CONTINENTAL DRILLING CO. CONTINENTAL EXPLORATION, LLC CONTINENTAL INDUSTRIES CONTINENTAL OPERATING COMPANY CONTINENTAL PRODUCTION COMPANY, LLC CONTINENTAL RESOURCES CONTINENTAL RESOURCES - US CONTINENTAL US EXPLORATION CONTINENTAL US EXPLR COOK EXPLORATION CO COOK INLET NATURAL GAS STORAGE ALASKA, LLC COOK OIL COMPANY COOPER OIL AND GAS CORAL COAST PETROLEUM LLC CORALL PRODUCTION CORPORATION CORDA CORP. CORDA CORPORATION CORDELE DEVELOPMENT CORP. CORDELLE DEVELOPMENT CORP. CORDILLERA ENERGY CORDILLERA ENERGY INC. CORE ENERGY, LLC CORE MINERALS OPERATING COMPANY, INC. CORE OIL AND GAS CORP. CORINTHIAN EXPLORATION CORP. CORKRAN ENERGY LP CORLENA OIL COMPANY CORNER STONE ENERGY INC. CORNERSTONE E & P COMPANY, LP CORNERSTONE NATURAL RESOURCES CORONADO COMPANY CORONADO ENERGY E & P COMPANY, LLC CORONADO ENERGY E & P COMPANY, LLC* CORONADO MINERALS, LLC CORTEZ HEARTLAND, LLC CORTEZ OIL & GAS CORUM PRODUCTION COMPANY CORY, KENNETH W. COSO OPERATING LLC COUCH OIL & GAS, INC. COUNTRYMARK ENERGY RESOURCES, LLC COURSON OIL AND GAS INC. COVE PETROLEUM CORP. COVINGTON OIL CO. COX AND PERKINS COX AND PERKINS EXPLORATION, INC. COX OPERATING, LLC CPN WILD HOUSE GEOTHERMAL, LLC CRAFT OPERATING COMPANY, LLC CRAIG ELDER OIL & GAS CRAIG ELDER OIL AND GAS, LLC CRAIG ELDER OIL AND GAS, LLC - US CRAIN'S HOT OIL SERVICE, INC. CRATON ENERGY CRATON ENERGY COMPANY II, LLC CRAWFORD ENERGY CRAWFORD HUGHES OPERATING COMPANY CRAWLEY PETROLEUM CRAWLEY PETROLEUM CORPORATION CRAWLEY PETROLEUM CORPORATION - US CREDO PETROLEUM CORP CREED OPERATING COMPANY, LLC CREGO EXPLORATION CRESCENT POINT ENERGY CORPORATION CREST ENERGY, INC. CREST RESOURCES CREST RESOURCES AND EXPL CREST RESOURCES AND EXPLORATION CREW RESOURCES CRIMSON ENERGY CRIMSON ENERGY COMPANY CRIMSON ENERGY PARTNERS, LP CRIMSON EXPLORATION, INC. CRIMSON RESOURCE MANAGEMENT CORP. CROSBYS CREEK OIL & GAS, LLC CROSS CREEK ENERGY, LLC CROSS OIL & WELL SERVICE, INC CROSSFOOT OPERATING, LLC CROSSROADS ENERGY PARTNERS, LLC CROW CREEK OPERATING CROW CREEK OPERATING COMPANY II, LLC CROW DRLG AND PROD CO CROWN DRILLING CROWN ENERGY CROWN ENERGY PARTNERS CROWN EQUIPMENT COMPANY CROWN PETROLEUM CORPORATION CROWN PETROLEUM, LLC CROWN QUEST CRUSADER ENERGY CRUSADER ENERGY GROUP, INC. CS SOLUTIONS CSC ENERGY CORP CUERVO EXPLORATION CUERVO, INC. CULBREATH OIL & GAS COMPANY, INC. CULVER & CAIN PRODUCTION, LLC CUMMING COMPANY, INC, THE CUMMINGS OIL CO. CUMMINS AND WALKER OIL CUMMINS AND WALKER OIL COMPANY, INC. CUMMINS AND WALKER OIL COMPANY, INC. - US CURT'S OIL OPERATION CUSTER & WRIGHT OPERATING, INC. CUTTER OIL COMPANY CUTTER PETROLEUM CW RESOURCES INC. CX OPERATING, LLC CYPRESS E & P CORPORATION CYPRESS E & P CORP CYPRESS E AND P CORP. CYPRESS OPERATING CYPRESS OPERATING, INC. CYPRESS PRODUCTION, INC. Cal-Tex Fossil, LLC Choice Exploration, Inc. Concordia Resources Inc. Coral Production Corporation D & D OIL COMPANY #2 D & J OIL COMPANY, INC. D & L ENERGY, INC. D & L ENERGY, INC. - US D - B DLG. CORP. D AND J OIL CO OF OKLA D AND L ENERGY D. E. Exploration, Inc. D. J. SIMMONS COMPANY D90 ENERGY, LLC DACAR ENERGY, INC. DAESUNG ENERGY RESOURCES, INC. DAKOTA EXPLORATION, INC. DAKOTA RESOURCES DAKOTA RESOURCES, INC. DALE OPERATING DALE OPERATING COMPANY DALLAS ENERGY, LLC DALLAS PRODUCTION DALLAS PRODUCTION, INC. DAMAR RES. DAMAR RESOURCES, INC. DAMAR RESOURCES, INC. - US - US DAN A HUGHES DAN A. HUGHES COMPANY, LP DAN A. HUGHES COMPANY, LP - US - US DANE G. HANSEN TRUST DANMARK ENERGY LP DANMARK ENERGY SERVICES, INC. DARK HORSE DARK HORSE EXPLORATION, INC. DARLING OIL CORPORATION DARRAH, JOHN JAY JR. DART OIL DAUGHERTY OIL COMPANY (OHIO) DAUGHERTY PETROLEUM DAUGHERTY PETROLEUM CORPORATION (KY) DAUGHERTY PETROLEUM, INC. DAUGHERTY PETROLEUM, INC. - US DAVE HOLKE CONSULTING, INC. DAVID ARRINGTON OIL AND GAS DAVID ARRINGTON OIL AND GAS, INC. DAVID ARRINGTON OIL AND GAS, INC. - US DAVID G. POWELL, INC. DAVID H ARRINGTON DAVID H. ARRINGTON DAVID R. HILL DAVIS BROS OIL PROD DAVIS BROS. DAVIS BROTHERS OIL DAVIS GULF COAST INC. DAVIS OIL & GAS, LLC DAVIS OPERATING COMPANY DAVIS PETROLEUM DAVIS SOUTHERN OPERATING COMPANY, LLC DAWSEY OPERATING COMPANY DAY DREAMS RESOURCES, LLC DAYBREAK OIL AND GAS INC. DAYSTAR DBC OPERATING COMPANY, LLC DBL DRILLING & PRODUCTION DBP EXPLORATION, INC. DCP MIDSTREAM, LP DDD ENERGY, INC. DEAN ENERGY, INC. DECKER OPERATING CO., L.L.C. DECKER OPERATING CO., LLC DEE DRILLING COMPANY, INC. DEEP GULF ENERGY, LP DEEP RESOURCES, LLC DEEP ROCK RESOURCES DEEP ROCK RESOURCES, INC. DEEP ROCK RESOURCES, INC. - US DEJOUR ENTERPRISES LTD. DEKA EXPLORATION INC DEL MAR ENERGY, INC. DEL MAR EXPLORATION COMPANY DEL PETROLEUM CORPORATION DELPHI OIL INC. DELTA AMERICAN OIL DELTA DEVELOPMENT DELTA OIL & GAS, LTD. DELTA OIL AND GAS CO DELTA OIL CO DELTA PETROLEUM CORP DELTA PETROLEUM CORP. DELTA US DELTA, FRANCE DELTEX MINERALS INC. DENALI OIL & GAS DENALI OIL & GAS MANAGEMENT, LLC DENALI OIL AND GAS LLC DENBURY DEPENDABLE OIL & GAS PRODUCTION, LLC DERBY OPERATING CORPORATION DEREK RESOURCES, INC. DESERT PRODUCTION, INC. DESOTO OPERATING DESTIN OPERATING COMPANY, INC. DEUTSCH OIL COMPANY DEVON DEVON LOUISIANA CORPORATION DEVON RESOURCES CORPORATION DEVONIAN DRILLING DEVONIAN DRLG. DEVONIAN GAS PRODUCTION, INC. DEWBRE OPERATING DGH PETROLEUM, INC. DHS DRILLING DIAMOND M DRILLING & EXPLORATION COMPANY DIAMOND OFFSHORE DIAMOND OIL, LLC DIAMOND OPERATING, LLC DIAMONDBACK DRILLING COMPANY DIAMONDBACK E&P, LLC DIAMONDBACK OPERATING, LP DIAMONDBACK RESOURCES, LLC DIASU EXPLORATION, INC. DIASU OIL AND GAS CO. DIMENSION ENERGY COMPANY, LLC DINERO OPERATING DIRECT DRILLING COMPANY LLC. DIRNETT, INC. DISCOVERY ENERGY COR DISCOVERY ENERGY CORPORATION DISCOVERY OPERATING DISCOVERY RESOURCES, LLC DIVERSIFIED OIL DIVERSIFIED OPERATING CORPORATION DIVERSIFIED OPR CORP DIVERSIFIED RESOURCES, INC. DIXON ENERGY, INC. DJ PRODUCTION SERVICES, INC. DOLBERRY ENERGY RESOURCES CORPORATION DOLPHIN OIL CO. DOMINION DOMINION FIELD SERVICS, INC. DON AND DAN DRLG. CO. DONRAY PETROLEUM, LLC DORADO E & P PARTNERS, LLC DORADO GAS RESOURCES, LLC DOUBLE "D"S, LLC DOUBLE EAGLE DOUBLE EAGLE EXPLORATION, INC. DOUBLE EAGLE O AND G INC DOUBLE EAGLE OIL AND GAS, INC. DOUBLE EAGLE OPERATING, LLC DOUBLE EAGLE PETROLEUM CORPORATION DOUBLE M PETRO PROPERTIES, INC. DOUBLE PLAY OIL & GAS, INC. DOUBLE PLAY OIL COMPANY DOUGLAS J. FLINT DOVE CREEK ENERGY, INC. DOWNING-NELSON OIL CO., INC. DOWNING-NELSON OIL COMPANY, INC. DOWNING-NELSON OIL COMPANY, INC. - US DRACO ENERGY DRACO ENERGY, INC. 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DYNASTY PETROLEUM, LLC Dallas Operating Dolphin Energy Dorado Gas Resources, LLC E & B NATURAL RESOURCES MANAGEMENT CORP E & P COMPANY, LLC E. B. BROOKS, JR. E. R. OPERATING COMPANY E.N. PATTON OIL COMPANY E.S. NICHOLS EXPLORATION EAGLE CREEK CORPORATION EAGLE CREEK RESOURCES, LLC EAGLE ENERGY CORPORATION EAGLE ENERGY PRODUCTION, LLC EAGLE ENERGY TRUST EAGLE FORD OIL CO., INC. EAGLE OIL & GAS EAGLE OIL & GAS COMPANY EAGLE OPERATING, INC. EAGLE ROCK ENERGY PARTNERS EAGLE ROCK OPERATING COMPANY, LLC EAGLERIDGE OPERATING, LLC EARLSBORO ENGINEERING CORP. EARLSBORO ENRGS CORP EARNEST PRODUCING CORPORATION EASON PRODUCTION COMPANY EAST CAMERON PARTNERS EAST CHEYENNE GAS STORAGE, LLC EAST RESOURCES EAST RESOURCES, INC. - US EAST TEXAS SALT WATER DISPOSAL CO. EASTERN AMER. 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OF AMERICA ENERGY CORPORATION OF AMERICA ENERGY DRILLING ENERGY EQUITY COMPANY ENERGY FROM TEXAS ENERGY INVESTMENT PARTNERS, LLC ENERGY OPER.(ENOPCO) ENERGY OPERATIONS OKLAHOMA, LP ENERGY PARTNERS ENERGY PARTNERS, LTD. ENERGY PIPE AND SUPPLY ENERGY PRODUCTION CO ENERGY PRODUCTION COMPANY ENERGY PRODUCTION CORPORATION ENERGY PRODUCTION CORPORATION - US ENERGY PRODUCTION, INC. ENERGY PROPERTIES INC ENERGY RECOVERY GROUP ENERGY RESOURCE TECHNOLOGY GOM, INC. ENERGY RESOURCE TECHNOLOGY, INC. ENERGY RESOURCES AMERICA ENERGY RESOURCES TECHNOLOGY ENERGY VENTURES LLC of Delaware ENERGY XXI (BERMUDA) LIMITED ENERGY XXI GOM, LLC ENERGY XXI SERVICES ENERGY XXII SERVICES LLC ENERGYQUEST II, LLC ENERGYQUEST MANAGEMENT, LLC ENERMARK - ENERPLUS ENERQUEST CORPORATION ENERQUEST PET. ENERQUEST PETROLEUM ENERVEST OPERATING LLC ENERVEST OPERATING LLC (CO) ENERVEST OPERATING LLC (CO) - US - US ENERVEST OPERATING, LLC ENERVEST OPERATING, LTD. ENEXCO ENEXCO, INC. 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ESPADA OPERATING, LLC ESSENJAY OPERATING ESTANCIA OIL & GAS, LLC ETERNAL ENERGY CORPORATION ETOCO ETOCO, INC. ETX FLUID SOLUTIONS, LLC EUREKA DRILLING COMPANY EUREKA DRLG CO EUREKA PROSPECTING COMPANY EVANS, S. LAVON EVEREST MINERAL CORP EVEREST MINERAL CORPORATION EVEREST RESOURCE COMPANY EVERFLOW EASTERN PARTNERS, LP EVERSTON EVERTSON COMPANIES EVERTSON WELL SERVICE, INC. EVOLUTION OPERATING COMPANY, INC. EW ENERGY OPERATOR, LLC EXARO ENERGY LLC EXCALIBUR E & P, LLC EXCALIBUR EXPLORATION, INC. EXCHANGE AVENUE PRODUCTION COMPANY EXCO PARTNERS OPERATING PARTNERSHIP EXCO RESOURCES EXL PETROLEUM LP EXODUS ENERGY, INC. EXPERT OIL & GAS EXPERT OIL & GAS, LLC EXPLORATION CO.,THE EXPLORATION TECHNIQUES, INC. EXPRESS OIL CO. EXPRO ENGINEERING EXPRO ENGINEERING, INC. EXTEX OPRATING COMPANY EXXCEL PRODUCTION COMPANY EXXON EXPLORATION & PRODUCTION EXXONMOBIL Energy Production Corporation F-W OIL INTEREST, INC. F. D. HILL DRILLING CO. F. D. MCCRARY OPERATOR, INC. F. HOWARD WALSH, JR. F.D. HILL DRLG.CO. F.L. BEARD FAGADAU ENERGY CORP FAIR OIL COMPANY FAIR OIL, LTD. FAIRWAY LINKS ENERGY, INC. FAIRWAY PETR. INC. FAIRWAY RESOURCES OPERATING, LLC FAIRWAYS FAIRWAYS EXPLORATION & PRODUCTION, LLC FAIRWAYS OFFSHORE EXPLORATION FALCON BAY ENERGY FALCON EXPLORATION CO. FALCON EXPLR. INC. FALCON OIL AND GAS FALCON OIL PROPERTIES, LLC FALCON RESOURCES, INC. FAMCOR OIL FAMCOR OIL, INCORPORATED FARMER, JOHN O, INC FASKEN OIL & RANCH FASKEN OIL AND RANCH, LTD. FASKEN OIL AND RANCH, LTD. - US FAULKNER CORP EXPLOR AND PROD FAULKNER EXPLORATION AND PRODUCTION FEDERAL AMERICAN ENERGY CORPORATION FEX L.P. FH PETRO CORP FIDELITY EXPLORATION & PRODUCTION CO. FIFE OIL AND GAS FIML NATURAL RESOURCES FIML NATURAL RESOURCES, LLC FIML NATURAL RESOURCES, LLC - US FINGER OIL & GAS, INC. FINLEY OILWELL FINLEY RESOURCES FIREWHEEL ENERGY, LLC FIRST EXPLORATION, LTD. FIRST LIBERTY FIRST SOURCE TEXAS INC FIRST TEXAS GAS LP FIRSTRIKE ENERGY CORPORATION FISCHER & FISCHER OIL, LLC FIVE STAR ENERGY, INC. FIVESTONES ENERGY, LLC FLASH GAS AND OIL FLASH GAS AND OIL NORTHEAST, INC. FLATIRONS RESOURCES, LLC FLETCHER OIL COMPANY FLEX ENERGY LLC FLINT EXPLORATION, LLC FLYING J EXPL AND PROD FLYING J EXPLORATION AND PRODUCTION FOOTHILL ENERGY PARTNERS, LLC FOOTHILLS CALIFORNIA INC FOOTHILLS ENERGY, LLC FOOTHILLS OIL & GAS, INC. FOOTHILLS TEXAS, INC. FORBES ENERGY SERVICES FORCE 5 ENERGY, LLC FORD, R. J., INC. FOREE OIL COMPANY FORELAND OPERATING, LLC FOREST OIL FORESTAR GROUP, INC. FOREXCO INC. FORGE ENERGY, LLC FORREST DRILLING COMPANY, LLC FORT APACHE ENERGY, INC. FORT WORTH OPERATING COMPANY, LLC FORTAY, INC. FORTRESS ENERGY FORTRESS ENERGY CORPORATION FORTSON OIL CO. FORTSON OIL COMPANY FORTUNA (U.S.) INC. FORTUNA (U.S.) LP FORTUNE ENERGY INC FORTUNE ENERGY, INC. FORTUNE PRODUCTION FORUM EXPLORATION FORZA OPERATING, LLC FOSSIL CREEK RESOURCES, LLC FOSSIL ENERGY GROUP, LLC FOSSIL OPERATING, INC. FOUNDATION ENERGY MANAGEMENT, LLC FOUNDATION OIL OCMPANY, INC. FOUNTAIN OIL COMPANY FOUR C OIL AND GAS CORPORATION- US FOUR SEVENS OIL COMPANY, LTD. FOUR STAR OIL AND GAS FOUR-C OIL AND GAS FOXBOROUGH ENERGY COMPANY, LLC FRAM OPERATING , LLC FRANK DAVIS EXPLORATION, INC. FRED WILSON DRILLING COMPANY FREEPORT MCMORAN FREEPORT OIL CO FRENCH, L. R., JR. FRONTIER ALLIANCE, LLC FROST BROTHERS FROST BROTHERS RESOURCES, LLLP FULLER PRODUCTION INC. FULSHEAR OIL & GAS LLC FURIE OPERATING, LLC FURIE PETROLEUM COMPANY, LLC FUTURE OIL AND GAS, INC. FUTURE PETROLEUM CCOMPANY, LLC FUTURE PETROLEUM COMPANY, LLC Fidelity Exploration & Production Frank W. Cole Engineering G & F OIL, INC. G & H DRILLING, INC. G & H RESOURCES, LLC G AND H PRODUCTION CO., LLC G AND T CONSULTING AND MANAGEMENT, LLC G.S.I. G3 OPERATING, LLC GADECO, LLC GAEA SERVICES, INC. GAEDEKE OIL & GAS OPERATING, LLC GAITHER PETROLEUM GALAXY OIL CO GALLAGHER DRILLING. CO. GARY-WILLIAMS PRODUCTION COMPANY GAS VENTURES GASCO ENERGY GASCO ENERGY, INC. GASCO, INC. GASPER RICE RESOURCES, LTD. GASTAR EXPLORATION LTD. GASTAR EXPLORATION TEXAS LP GATO CORPORATION GATOR ENERGY OPERATING, LLC (FL) GAW OIL COMPANY GB WELL SERVICES, INC GCER ONSHORE, LLC GED Operating, LLC GEE DEVELOPMENT SERVICES, INC. GEISER OPERATING, INC. GEMARMI, INC. GENE HEAPE GENE STALNAKER GENESIS PETROLEUM US, INC. GENESIS PRODUCING COMPANY GENESIS PRODUCING COMPANY, LP GEO ENERGY & COMPRESSION, INC. GEO QUEST ENERGY GEO VESTOR TEXAS,INC GEO-SOUTHERN ENERGY GEO-VEST GEO-VEST OF TEXAS, INC. GEODOMINION PETROLEUM GEOEX RESOURCES INC. GEOMARK RESOURCES LLC GEONATURAL RESOURCES GEORESOURCES, INC. GEORGE R. BROWN GEORGE R. BROWN PARTNERSHIP GEOSURVEYS AUST PTY. GERRY HESS OPERATING GHK CO. GHK COMPANY GHK CORPORATION GIANT NRG COMPANY, LP GIANT OPERATING, LLC GIBRALTAR ENERGY COMPANY GIEBEL PETROLEUM LTD GILBERT STEWART OIL GILL RANCH STORAGE, LLC GINGER OIL COMPANY GINGER PETROLEUM GLACIER PETROLEUM COMPANY GLASSELL PROD. CO. GLASSELL PRODUCING COMPANY GLB EXPLORATION GLB EXPLORATION, INC GLENN SUPPLY GLOBALSANTAFE GLOBE OPERATING, INC. GMT EXPLORATION GMT EXPLORATION COMPANY, LLC GMT INC. GMX RESOURCES GMX RESOURCES INC GMX RESOURCES INC - US GNAD OIL, LLC GOLD KING PETROLEUM GOLDCO OPERATING, LLC GOLDEN EAGLE DRILLING CO. GOLDEN EAGLE DRLG CO GOLDEN EAGLE EXPLORATION, LLC GOLDEN ENERGY PARTNERS, LLC GOLDEN RESOURCES CO. GOLDEN TRIANGLE STORAGE, INC. GOLDKING PROD. CO. GOLDSBERRY OPERATING GOLDSTON OIL GOLDSTON OIL CORP. GOMEX ENERGY OFFSHORE, LTD. GOOBER DRILLING CORPORATION GOODRICH GOODRICH PETROLEUM CORPORATION GOODRICH PETROLEUM CORPORATION - US GORDY OIL GORDY OIL CO. GORDY OIL CO. - US GORE OIL COMPANY GOSNEY & SONS, INC. GP II ENERGY, INC. GPC, LLC GRA EX, LLC GRADIENT RESOURCES, INC. GRAHAM, PAUL DRLG CO GRAND MESA OPERATING COMPANY GRAND OPERATING GRAND OPERATING, INC. GRAND RESOURCES INC GRANDFIELD CONSULTING, INC. GRANITE OPERATING COMPANY GRANITEBAY OPERATING, INC. GRAWARD OPERATING GRAYSTONE GREAT BAY OPERATIONS, LLC GREAT BEAR PETROLEUM, LLC GREAT GULFCAN ENERGY, INC. GREAT LAKES CHEMICAL GREAT LAKES ENERGY PARTNERS LLC GREAT LAKES EXPLORATION GREAT OAK ENERGY GREAT PLAINS ENERGY, INC. GREAT PLAINS ENERGY, LLC GREAT PLAINS PETROLEUM, INC. GREAT TEXAS CRUDE, INC. GREAT WALL DRILLING COMPANY GREAT WEST ENERGY GREAT WESTERN GREAT WESTERN OIL & GAS COMPANY, LLC GREEHEY & CO LTD GREENHUNTER ENERGY, INC. GREENWOOD RESOURCES COMPANY, LLC GREER EXPLORATION CORPORATION GRENADIER ENERGY PARTNERS, LLC GRESS OIL & GAS, INC. GREY WOLF GREYSTONE DRILLING LP GREYSTONE OIL & GAS, LLP GRIFFIN & GRIFFIN EXPLORATION, LLC GRIFFIN AND GRIFFIN OIL GRIFFIN OPERATING, INC. GRIFFIN PETROLEUM COMPANY GRIFFON AND ASSOCIATES LLC GRIGSBY PETROLEUM, INC. GRINGO OPERATING COMPANY, INC. GRUY PETROLEUM MANAGEMENT GRUY PETROLEUM MANAGEMENT CO., LLC (NON CIMAREX)) GRYNBERG EXPLORATION GRYNBERG PETROLEUM GRYNBERG PETROLEUM CO. GRYNBERG PETROLEUM COMPANY GRYPHON EXPLORATION GUICHARD GUICHARD OPERATING GUICHARD OPERATING COMPANY, INC. GULF BEND RESOURCES, LLC GULF COAST ENERGY RESOURCES GULF EXPLORATION GULF EXPLORATION LLC GULF PRODUCTION CORP GULF PRODUCTION CORPORATION GULF SOUTH OPERATORS, INC. GULF SOUTH PIPELINE COMPANY, LP GULF-TEX DRILLING GULFPORT ENERGY GULFPORT ENERGY CORPORATION GULFPORT ENERGY CORPORATION - US GULFSTAR DRLG CORP GULFSTAR PROPERTIES, INC. GULFTEX ENERGY LLC GULFTEX OPERATING, INC GUNGOLL GUNN OIL CO GUNN OIL CO. GUNNISON ENERGY CORPORATION GUSTAVSON AND ASSOC. Gastar Exploration Texas LP Geyser Petroleum Grayhawk H & B PETROLEUM CORPORATION H & C OIL OPERATING, INC. H & L EXPLORATION COMPANY, LLC H & M RESOURCES, LLC H & P EXPLORATION COMPANY H AND B SALES AND DELIVERY H AND L OPERATING CO. H AND M OIL PRODUCERS H AND M PETROLEUM H AND T EXPLORATION, INC. H-M RESOURCE MANAGEMENT, INC. H-PETRO-R, INC. H. L. BROWN OPERATING, LLC H. L. BROWN, JR. H. P. 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HANNA OIL AND GAS HANNA OIL AND GAS COMPANY HANNA OIL AND GAS COMPANY - US HANNATHON PETROLEUM, LLC HANSEN TRUST HARBOR PETROLEUM, LLC HARD ROCK DRILLING & PRODUCTION LLC HARD ROCK EXPLORATION HARDEE PETROLEUM HARDEE PETROLEUM COMPANY HARDING HARDING & SHELTON HARDING AND SHELTON HARDING AND SHELTON - US HARDWAY PRODUCTION & OPERATING, LLC HARLETON OIL AND GAS HARLETON OIL AND GAS, INC. HARLEY DRILLING & PRODUCING, INC. HARPER AND HEFTE HARRIGAN ENERGY PARTNERS, INC. HARRISON HARSH INTERNATIONAL, INC. HART PETROLEUM SERVICES, INC. HARTMAN OIL COMPANY, INC. HARVARD PETROLEUM HARVARD PETROLEUM COMPANY, LLC HARVEST (US) HOLDINGS, INC. HARVEST OIL & GAS, LLC HARVEST PETROLEUM, INC. HAT CREEK ENERGY, LLC (CO) HATHAWAY, LLC HAWTHORN ENERGY PARTNERS, LLC HAWTHORNE OIL AND GAS HAWTHORNE, H. A. HAY EXPLORATION HEADINGTON OIL & GAS HEAPE, GENE HEARTLAND DRILLING HEARTLAND OIL AND GAS, INC. HECKMANN CORPORATION HEDC OPERATING, INC. 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HIGH PLAINS DISPOSAL HIGH PLAINS DRILLING COMPANY HIGH PLAINS OPERATING COMPANY, LLC (CA) HIGH PLAINS PETROLEUM CORPORATION (CO) HIGH ROLLER WELLS, LLC HIGH SIERRA ENERGY HIGH SKY PARTNERS, LLC HIGHLAND OIL & GAS COMPANY (NM) HIGHLAND OIL AND GAS, LLC HIGHLAND OIL AND GAS, LLC (AR) HIGHLAND OIL AND GAS, LLC (TX) HIGHLINE OPERATING, LLC. HIGHMOUNT OPERATING, LLC HILCORP ENERGY HILCORP ENERGY COMPANY HILCORP ENERGY COMPANY - US - US HILL DRILLING HILL OIL CO HILL, R. M. HILLIARD PETROLEUM HILLTEX OPERATING COMPANY HILLWOOD ENERGY ALABAMA, LP HILLWOOD ENERGY TEXAS, LP HILLWOOD OIL & GAS OPERATING COMPANY, LP HINKLE OIL AND GAS HJ, INC. HOGBACK EXPLORATION HOGBACK EXPLORATION, INC. - US HOLKE, DAVE HOLL, F. G. HOLLEY OIL COMPANY HOLLEY OIL COMPANY, LLC HOLLIMON OIL HOLLIMON OIL CORPORATION- US HOLLIS AND COMPANY HOLLRAH EXPLORATION HOLMES EXPLORATION HOLMES WESTERN OIL CORPORATION HOOSIER ENERGY HOPEWELL OIL & GAS DEVELOPMENT CO., INC. 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KINDEE OIL & GAS LOUISIANA, LLC KINDEE OIL & GAS TEXAS LLC KINDER MORGAN KINDER MORGAN CO2 COMPANY, LP KING DRILLING COMPANY KING ENERGY KING ENERGY COMPANY KING OIL OPERATIONS KING OPERATING KING OPERATING CORPORATION KING OPERATING CORPORATION - US KINGFISHER RES., INC KINGFISHER RESOURCES, INC KINGWOOD EXPLORATION, LLC KIRKPATRICK OIL CO KIRKPATRICK OIL COMPANY, INC. KLASSEN ENERGY, INC. KLEESE DEVELOPMENT KLONDIKE ENERGY, LP KMD OPERATING COMPANY, LLC KNIGHT RESOURCES, INC. KNIGHT RESOURCES, LLC (TX) KNIGHTON OIL COMPANY, INC. KNOX ENERGY INC. KNOX ENERGY INC. (OHIO) KOCH EXPLORATION CO KODIAK OIL & GAS (USA), INC. KODIAK PETR KODIAK PETROLEUM KOKOMO DRILLING, LLC KOUGA ENERGY GROUP, LLC KRAKER & MARTIN ENERGY, LLC KRAMER OIL CO. KRESCENT ENERGY COMPANY KRIEBEL GAS INC. KRITI EXPLOR. INC. KWB OIL PROPERTY MANAGEMENT, INC. Kraker & Martin Energy, LLC L & J EXPLORATION, LLC L & M OPERATING, INC. L & R TANK TRUCKS L B EXPLORATION, INC. L E JONES OPERATING INC. 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LEGACY OPERATING LEGACY RESERVIES OPERATING, LP LEGADO MIDCON, LLC LEGADO PERMIAN, LLC LEGEND NATURAL GAS LEGEND NATURAL GAS LP LEGEND NATURAL GAS LP - US LEGEND OPERATING, LLC LEOR ENERGY, LP LEWIS ENERGY LEWIS OIL CORPORATION LEWIS OIL PROPERTIES LEXGAS, INC. LIBERTY DRILLING COMPANY LIBERTY PETROLEUM LIBERTY PIONEER ENERGY SOURCE, INC. LIBERTY RESOURCES, INC. LIBERTY RESOURCES, LLC (CO) LIGHTHOUSE OPERATING, INC. LIGHTNING OIL CO. LIGHTNING OIL COMPANY LIME ROCK RESOURCES LIMESTONE EXPLORATION, LLC LINC ENERGY LINC GULF COAST PETROLEUM, INC. LINCOLN ENERGY OPERATING, LLC LINDER OIL CO. LINDER OIL COMPANY, A PARTNERSHIP LINN ENERGY, LLC LINN OPERATING, LLC LITTLE RIVER ENERGY COMPANY LITTLE, QUINTIN, CO LIVE OAK ENERGY, INC. LIVE OAK LIMITED LIVE OAK RESERVES, INC LKD CORPORATION LLEWELLIN OPERATING COMPANY, LLC LLOG EXPLORATION LLOG EXPLORATION COMPANY, LLC LMP EXPLORATION LMP PETROLEUM, INC. LOBO EXPLORATION CO. LOBO EXPLORATION COMPANY LOBO EXPLORATION COMPANY - US LOBO OPERATING, INC. LODI GAS STORAGE LODI GAS STORAGE, LLC LOEWS CORPORATION LOGOS CAPITAL MANAGEMENT LOGOS CAPITAL MANAGEMENT, LLC LONDON PETROLEUM LONE MOUNTAIN PROD LONE STAR LAND AND ENERGY II, LLC LONE STAR NGL MONT BELVIEU, LP LONE STAR OIL & GAS, INC. (TX) LONE STAR, LLC LONESTAR OIL COMPANY LONG RESOURCES, INC. LONG TRUSTS LONGBOW, LLC LONGBRANCH ENERGY, LP LONGFELLOW ENERGY, LP LONGLEAF ENERGY GROUP, INC. LONGVIEW PRODUCTION CO. LONGVIEW PRODUCTION COMPANY LOTHIAN OIL INC. LOTUS OPERATING COMPANY, LLC LOU LITTLE OPERATING CO., INC. LOUISIANA DELTA OIL CO., LLC LOUISIANA GAS DEV. CORP. LOUISIANA GAS DEVELOPMENT CORP LOUISIANA GAS DEVELOPMENT CORPORATION LOUTEX PRODUCTION COMPANY LOWRY EXPLORATION, INC. LOYD JONES WELL SERVICE LP OPERATING, LLC LPES, INC. LTS OIL & GAS LUCA OPERATION, LLC LUFF EXPLORATION LUFF EXPLORATION CO LYAS, INC. LYCO ENERGY CORP. LYMAC EXPLORATION AND PRODUCTION, LLC LYNN DRILLING CO LYNX LYNX OPERATING COMPANY, INC. LYNX OPERATNG COMPANY, INC. LYNX PETROLEUM CONSULTANTS, INC. Lags Exploration Laredo Energy, LP Laymon Oil Co. Layton Energy M & B OPERATING COMPANY M & G DRILLING COMPANY, INC. M & M ROYALTY, LTD. M AND C DRLG CONTR ILL M AND E OPERATING M AND G DEVELOPMENT CO M M ENERGY, INC. M M RESOURCES, INC. M'RED PETROLEUM, LLC - US M-RED PETRO. COMPANY M. E. OPERATING M.W. PETROLEUM CORP. MAC DRILLING CO. MACHIN & ASSOCIATES, INC. MACHIN AND ASSOCIATES MACK ENERGY MACK ENERGY CO MACK ENERGY CO - US MACKELLAR, INC. MACPHERSON OIL CO MACPHERSON OIL COMPANY MACPHERSON OIL COMPANY - US MACQUARIE LONGVIEW ACQUISITIONS MAGELLAN E&P HOLDINGS, INC. MAGELLAN EXPLORATION & PRODUCTION HOLDINGS, INC. MAGELLAN PETROLEUM CORPORATION MAGMA RESOURCES, LLC MAGNA OPERATING, LLC MAGNET OIL, LP MAGNUM MAGNUM HUNTER PRODUCTION CO. MAGNUM HUNTER RESOURCES CORPORATION MAI OIL OPERATIONS MAI OPERATIONS MAIN ENERGY MAINLAND RESOURCES, INC. MAJESTIC CONSULTING MAJESTIC DRLG. INC. MAJESTIC ENERGY MAJOR DRILLING GROUP MAK-J ENERGY PARTNERS (TEXAS) LTD. MAK-J ENERGY WYOMING, LLC MAK-J Energy Wyoming, LLC MANCAL ENERGY MANDALAY OIL & GAS, LLC MANEK EXPLORATION, INC. MANGUM HUNTER RESOURCES CORPORATION MANHATTAN PETROLEUM, INC. MANNON L. WALTERS, INC. MANTI EXPLORATION OPERATING, LLC MANTI OPERATING MANTI OPERATING COMPANY MANTI OPERATING COMPANY - US MANTI RES., INC. MANTI RESOURCES, INC. MANTLE OIL & GAS, LLC MANZANO OIL MANZANO, LLC MAP OIL COMPANY, INC. MAR OIL & GAS CORPORATION MAR OIL COMPANY MARALEX MARALEX RESOURCES MARATHON MARATHON DOMESTIC, LLC MARBOB ENERGY MARBOB ENERGY CORPORATION MARBOB ENERGY CORPORATION - US - US MARIC DRILLING COMPANY MARINER ENERGY MARINER GULF OF MEXICO, LLC MARITECH MARITECH RESOURCES MARITECH RESOURCES - US MARITECH RESOURCES, INC. MARJAC OIL CO MARJO OIL MARLIN ENERGY MARLIN ENERGY OFFSHORE, LLC MARLIN ENERGY SOUTHWEST GP, LLC MARLIN ENERGY, LLC MARLIN EXPLORATION MARLIN OIL CORPORATION MARQUEE CORP. MARQUEE CORPORATION MARQUIS ALLIANCE ENERGY GROUP MARSHAL OIL CORP MARSHALL AND WINSTON MARSHALL AND WINSTON, INC. MARSHALL OIL CO. MARSHFIELD OIL & GAS, LLC MARTIN-MARKS OPERATING COMPANY, LLC. MAS OPERATING COMPANY MASCOT OIL COMPANY MASTER RESOURCES LLC MATADOR PETROLEUM MATADOR PRODUCTION MATADOR PRODUCTION COMPANY MATADOR PRODUCTION COMPANY - US MATRIS EXPLORATION CO. MATRIX ENERGY MATRIX ENERGY, LLC MATRIX OIL AND GAS MATRIX OIL CORP. MAVERICK BROTHERS RESOURCES LLC MAVERICK DRILLING, INC. (OKLAHOMA) MAVERICK DRLG INC-OK MAVERICK OPERATING MAVERICK PRODUCTION COMPANY, INC. MAXIMA ENERGY CORP MAXIMUS OPERATING LTD MAXWELL RESOURCES MAYCO OIL MAYNE & MERTZ MAYNE AND MERTZ MBI OIL AND GAS, LLC MC ELVAIN ENERGY, INC. MCALLISTER DRLG, INC MCBEE (THE) COMPANY MCBEE OPERATING COMPANY, LLC MCCLELLAN OIL MCCLESKEY OIL & GAS, LLC MCCLURE OIL CO. MCCLURE OIL COMPANY, INC. MCCLYMOND, INC. MCCLYMOND, LTD. MCCOMBS ENERGY, LLC MCCOY PETROLEUM CORP MCCOY PETROLEUM CORPORATION MCCOY PETROLEUM CORPORATION - US MCCUTCHIN PETROLEUM CORPORATION MCDAY ENERGY CORPORATION MCDONALD & JOHNSON RESOURCES, LLC MCELVAIN OIL & GAS PROPERTIES, INC. MCELVAIN, T.H. O AND G MCENCO, INC. MCGEE DRILLING CORP. MCGEE, W.R. OPERT. MCGOWAN WORKING PARTNERS MCKAY OIL MCMORAN EXPLORATION COMPANY MCMORAN OIL & GAS MCPHERSON, YATES & FLIPPIN, LLC MCX GULF OF MEXICO, LLC MEADCO PROPERTIES MEADE ENERGY CORPORATION MEDALLION EXPLORATION MEDCO MEDCO ENERGI USA, LLC. MEDDERS OIL CO MEDICINE BOW OPERATING MEGA ENERGY MEGAENERGY OPERATIONS, INC. MEGO RESOURCES, LLC MELROSE OPERATING MEMORIAL PRODUCTION OPERATING, LLC MENOAH PETROLEUM, INC. MEREKEN LAND AND PRODUCTION CO. MERIDIAN MERIDIAN RESOURCES USA, INC. MERIT DRLG MERIT ENERGY MERITAGE ENERGY COMPANY MERLON PETROLEUM CO., INC. MERRION OIL & GAS MERRITT OPERATING MERRITT OPERATING COMPANY MERRITT OPERATING, INC. MESA ENERGY HOLDINGS, INC. MESQUITE SWD, INC. MESSENGER PETROLEUM, INC. MESTENA MESTENA OPERATING, LTD. MESTINA, INC. METANO ENERGY METANO ENERGY LP METRO SALTWATER DISPOSAL, INC. METROPLEX BARNETT SHALE, LLC MEWBOURNE MEWBOURNE OIL COMPANY MEWBOURNE OIL COMPANY - US - US MEXCO ENERGY CORPORATION MFC DRILLING, INC. MFP PETROLEUM, LP MICA ENERGY CORP MICA ENERGY CORPORATION MICHIWEST ENERGY INC. MID-CON ENERGY GROUP MID-CONTINENT DRILLING CORPORATION MID-CONTINENT ENERGY CORPORATION MID-CONTINENT ENERGY OPERATING COMPANY MID-CONTINENT RESOURCES, INC. MID-STATES OPERATING COMPANY MIDCO EXPLORATION MIDCO EXPLORATION INCORPORATED MIDDLETON OIL CO MIDDLETON OIL COMPANY MIDDLETON PETROLEUM, LLC MIDENERGY OPERATING, LLC MIDLAND ENERGY MIDLAND ENERGY, INC. MIDLAND OIL AND GAS MIDLAND TMG INC. MIDNIGHT DRILLING, LLC MIDROC OPERATING CO. MIDROC OPERATING COMPANY MIDROC OPERATING COMPANY - US MIDROCK OIL CO MIDSTATES PETROLEUM MIDSTATES PETROLEUM COMPANY, LLC MIDVILLE ENERGY, LLC MIDWESTERN EXPLORATION MIDWESTERN EXPLR MIKE PRODUCING, INC. MIKE ROSS, INC. MIKOL OIL, LLC MILAGRO EXPLORATION MILAGRO EXPLORATION, LLC MILAGRO EXPLORATION, LP MILESTONE OPERATING MILLER DYER COMPANY MILLER ENERGY MILLER ENERGY INC MILLER ENERGY RESOURCES, INC. MILLER OIL MILLWEE OIL, INC. MINERAL RESOURCES MINERAL TECHNOLOGIES, INC. MINIHAN OIL AND GAS CO MIRADA PETROLEUM CORP. MIRAMAR PETROLEUM MIRAMAR PETROLEUM, INC. MISS-LOU OPERATING, LLC MISS.RIVER TRANS.CO. MISSION RESOURCES MISSISSIPPI HUB LLC MISSISSIPPI POWER COMPANY MISSISSIPPI RESOURCES, LLC MISSOURI BASIN WELL SERVICE INC MK OPERATING, LLC MLC OPERATING, LP MOBEETIE RESOURCE DEVELOPMENT, LLC MOCKINGBIRD MIDSTREAM GAS SERVICES, LLC MODERN EXPLORATION MODERN EXPLORATION, INC. MOHICAN OIL & GAS, LLC MOLOPO ENERGY TEXAS, LLC MOLZ OIL COMPANY MOMENTUM MOMENTUM ENERGY CORPORATION MONCRIEF OIL COMPANY MONCRIEF, W. A. MONDO OPERATING COMPANY MONEXO OPERATING COMPANY MONFORTE EXPLORATION, LLC MONTANA LAND & EXPLORATION, INC. MONTCLAIR ENERGY, LLC MONTECRISTO EXPLORATION, INC. MONTELLO RESOURCES USA LTD. MONTY HOTT PRODUCTION CORPORATION MONUMENT DRILLING COMPANY MONUMENT DRLG CO MONUMENT GAS MARKETING, INC. MOON HINES TIGRETT OPERATING IN MOON HINES TIGRETT OPERATING INC. MOORE ENGINEERING & PRODUCTION CO., INC. MOORE PETROLEUM SVC. MORANSCO ENERGY CORPORATION MOREXCO OIL AND GAS CO MORGAN ENTERPRISES C/O MARQUEE CORP. MORRIS, W. DALE MORTIMER EXPLORATION MORTIMER PRODUCTION COMPANY MORTON SALT COMPANY MOSBACHER ENERGY MOSBACHER ENERGY CO MOUNTAIN PETROLEUM CORPORATION MOUNTAIN VALLEY OIL AND GAS MOUNTAIN VIEW ENERGY, INC. MOXIE DISPOSAL SYSTEMS, LLC MS ONSHORE, LLC MTN ENERGY, INC. MTS ENERGY, INC. MUELLER ENGINEERING CORP. MUELLER EXPLORATION, INC. MULL DRILLING CO., INC. MULL DRLG CO INC MULLOY OPERATING, INC. MUNDAY OPERATING COMPANY LLC MURCHISON OIL & GAS MURCHISON OIL & GAS COMPANY, INC. MUREX PETROLEUM, INC. MUREXCO PET. INC. MUREXCO PETROLEUM, INC. MURFIN DRILLING MURFIN DRILLING COMPANY, INC. MURPHY OIL MURRAY HILL ENERGY, INC. MURVIN AND MEJER OIL COMPANY MUSKEGON DEVELOPMENT MUSTANG DRILLING INC MUSTANG DRILLING LTD MUSTANG ENERGY MUSTANG ENERGY CORPORATION MUSTANG ENERGY CORPORATION (KS) MUSTANG ENERGY, INC. (TX) MUSTANG FUEL MUSTANG FUEL CORPORATION MWS PRODUCING, INC. MYCO MYCO INDUSTRIES, INC. Mesa Chica Corp. Methane Energy Mineral Resources N E N ENERGY N M & O OPERATING CO. NABORS INDUSTRIES NADEL & GUSSMAN NADEL & GUSSMAN HEYCO, LLC NADEL & GUSSMAN HEYCO, LLC - US NADEL & GUSSMAN, LLC NADSOIL COMPANY, LLC NAHAMA AND WEAGANT NAKNEK ELECTRIC ASSOCIATION NANA OIL AND GAS, INC. NANCE PETROLEUM NAPCUS NATIONAL DEVELOPMENT NATIONAL ENERGY NATIONAL FUEL CORP NATIONAL FUEL GAS SUPPLY CORPORATION NATIONAL ONSHORE, LP NATURAL RESOURCES NAUMANN OIL AND GAS CO NAUTILUS EXPLORATION NAVAJO NATION OIL & GAS COMPANY, INC. NAVIDAD RESOURCES, LLC NAVITAS LAND & MINERALS, LLC NAVITAS LAND AND MINERAL DEVELOPEMENT NAVITAS LAND AND MINERAL DEVELOPEMENT (KY) NAVITAS OIL & GAS, LLC NCEY HOLDINGS, LLC NCL NATURAL RESOURCES, LLC NCPA NCPA (NORTHERN CALIFORNIA POWER AGENCY) NCX COMPANY NEARBURG NEARBURG PRODUCTION COMPANY NEG OPERATING NELSON DRLG AND WELL SV NELSON ENERGY, INC. NELSON EXPLOR. CORP. NELSON EXPLORATION CORPORATION NELSON OIL AND GAS NEMAHA OIL AND GAS, LLC NEON ENERGY CORPORATION NERD GAS COMPANY NEUMIN PROD CO NEUMIN PRODUCTION NEUMIN PRODUCTION COMPANY NEVADA GEOTHERMAL POWER COMPANY NEVADA GEOTHERMAL POWER, INC. NEW CENTURY NEW DOMINION NEW DOMINION, LLC NEW DOMINION, LLC - US NEW GULF ENERGY, LLC NEW GULF OPERATING, LLC NEWARK ENERGY, LLC NEWCORE ENERGY, LLC NEWFIELD NEWFIELD DRILLING COMPANY NEWGULF PETROLEUM LLC NEWMAN CORPORATION NEWPARK ENVIRONMENTAL SERVICES, LLC NEXEN NFR ENERGY LLC NFR ENERGY LLC - US - US NGAS RESOURCES, INC. NGO DEVELOPMENT CORPORATION NIELSON & ASSOCIATES INC. NIELSON ENERGY GROUP, LLC NIELSON ENTERPRISES NIGHTHAWK ENERGY PLC NIPPON NMR ENERGY NOBLE ENERGY NOBLE ENERGY PRODUCTION NOMAC DRILLING CO. NOR-TEX RESOURCES, LLC NORDAQ ENERGY, INC. NORDSTRAND ENGINEERING, INC. NORNEW NORNEW, INC. NORNEW, INC. - US NORSE ENERGY CORPORATION USA NORSTAR PETROLEUM INC. NORTH SOUTH OIL, LLC NORTH AMERICAN DRILLING CORPORATION NORTH AMERICAN PETROLEUM CORP. USA NORTH AMERICAN RESOURCES CO. NORTH FINN, LLC NORTH PLAINS ENERGY, LLC NORTH RANGE EXPLORATION, LLC NORTH SHORE ENERGY, LLC NORTH STAR OPERATING COMPANY NORTH TEXAS LLANO NORTH TEXAS LLANO OPERATING CO NORTHCOAST OIL NORTHCOAST OIL CO. NORTHEAST NATURAL ENERGY, LLC NORTHERN LIGHTS OIL CO. NORTHSTAR AR GOM, LLC NORTHSTAR OFFSHORE GROUP, LLC NORTHSTAR OPERATING COMPANY NORTHSTAR PETROLEUM NORTHWEST GEOTHERMAL CO. NORTHWEST PETROLEUM INC. NORTHWEST SERVICES NORTHWIND OIL & GAS, LLC NORTON ENERGY DRILLING NOSIVAD OIL NOTRE DAME PETROLEUM COMPANY NOVO EXPLORATION NOVUS LOUISIANA, LLC NOVUS OPERATING COMPANY L.P. NOVUS OPERATING, LLC NRG ASSETS MANAGEMENT, LLF NYTEX CORPORATION Nevada Geothermal Power Inc. Noble Energy Production O & G WELL SERVICE, LLC O'BENCO O'BRIEN ENERGY O'BRIEN ENERGY COMPANY O'BRIEN ENERGY RESOURCES CORPORATION O'BRIEN OIL, LLC O'BRIEN OPERATING O'BRIEN RESOURCES, LLC O'NEAL DRILLING CO. O'RYAN OIL & GAS O'TOOL OIL & GAS, LLC O. H. B. INC. O. H. M. OPERATING OAKHILLS DRILLING AND OPERATING OAKLAND DRLG. CO. OASIS OIL CO OASIS OPERATING, INC. OASIS PETROLEUM NORTH AMERICA, LLC OBELE OIL COMPANY OBENCO INC OBENCO INC. OBENCO INC. - US OCCIDENTAL OCCIDENTAL OIL AND GAS COMPANY ODYSSEY PETROLEUM OEX-1, LLC OFFSHORE INTERNATIONAL GROUP, INC. OGDEN RESOURCES, LTD. OGDEN WHOLESALE CO OGE DRILLING OGL HOLDINGS, LLC OGX RESOURCES OGX RESOURCES LLC OGX RESOURCES, LLC OHIO BUCKEYE ENERGY, LLC OHIO VALLEY ENERGY SYSTEM OIL AND GAS DEV. CORP. OIL AND GAS MANAGEMENT, INC. OIL COMPANY OF AMERICA, INC. OIL PATCH PIPE AND SPY OIL PRODUCERS INC/KS OIL PRODUCERS, INC. (KANSAS) OILFIELD MANAGEMENT OK ARENA OPERATING COMPANY OKLAHOMA DRLG CORP OKLAND OIL OKLAND OIL COMPANY OKLAND OIL COMPANY - US - US OKT RESOURCES, LLC OLEUM OPERATING COMPANY, LC OLSEN ENERGY OLSEN ENERGY, INC. 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OZ GAS Oz Gas P & A OPERATING, INC. P L O OIL CO. P.L.O., INC. P.O.&G. OPERATING, LLC PABLO DRILLING PABLO ENERGY, INC. PAC DRILLING, LLC PACE,PREBLE AND POOLE PACESETTER ENERGY INC. PACESETTER ENERGY, LLC PACIFIC ENERGY DEVELOPMENT CORP. PACIFIC OPERATORS OFFSHORE PAGE OIL & GAS, LLC PAGE OPERATING, LLC PAINT ROCK OPERATING, LLC PALACE OPERATING COMPANY PALADAR INVESTMENTS I, LLC PALADIN ENERGY CORP PALADIN PETROLEUM PALADIN PETROLEUM III, LLC PALM ENERGY OFFSHORE, LLC PALMER OIL AND GAS CO PALMER PET. CORP. PALMER PETR INC PALMER PETROLEUM CORPORATION PALMER PETROLEUM, INC PALOMA RESOURCES PALOMA RESOURCES LLC PALOMINO PETROLEUM COMPANY, LLC PAN AMERICAN OIL PANACO, INC. PANAMERICAN OPERATING, INC. PANEXCO OPERATING, LLC PANGAEA PROPERTIES PANOCHE ENERGY CENTER PANTERA ENERGY CO. PANTERA ENERGY COMPANY PANTHER BAYOU ENERGY, LLC PANTHER ENERGY PAR DEVELOPMENT CORPORATION PAR MINERALS PAR MINERALS CORPORATION PAR OIL CO PARADIGM JOINT VENTURE PARAGON CORP PARAGON CORPORATION PARALLEL PET. CORP. PARALLEL PETROLEUM CORPORATION PARK EXPLORATION, INC. PARR MINERALS PARSLEY ENERGY OPERATIONS, LLC PARTEE DRILLING COMPANY PARTEE DRILLING, INC. PARTEE DRLG CO PARTEE ENTERPRISES PARTEN OPERATING, INC. PARTEN, J. R. PARWEST LAND EXPLORATION, INC. PATARA OIL & GAS, LLC PATHFINDER EXPLORATION, LLC PATINA OIL & GAS PATRIOT DRILLLING PATRIOT ENERGY RESOURCES (OK) PATRIOT EXPLORATION CORP. PATRIOT RESOURCES, INC. PATRIOT RESOURCES, INC. (TX) PATRIOT RESOURCES, INC. (TX) - US PATRIOT RESOURCES, LLC (CA) PATRON ENERGY, LLC PATTERSON ENERGY CORPORATION PATTERSON PETROLEUM PATTERSON PRODUCTION PATTERSON-UTI PAUL GILLHAM OIL CO. PAXCO, INC. PAXTON MADISON, LLC PAXTON OIL CO. PAXTON RESOURCES, LLC PAYNE EXPLORATION PAYSON PETROLEUM, INC. PB ENERGY STRORAGE SERVICES INC. PB-KBB, INC. 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PHOENIX ENERGY PRODUCTIONS, INC. PHOENIX EXPLORATION PHOENIX EXPLORATION COMPANY, LP PHOENIX EXPLORATION COMPANY, LP - US PHOENIX HYDROCARBON PHOENIX HYDROCARBONS OPERATING CORP. PHOENIX LEASE SERVICES, LLC PHOENIX PETROCORP, INC. PHOENIX PETROLEUM COMPANY PHOENIX PRODUCTION COMPANY PHOENIX RESOURCES PIEDRA OPERATING, LLC PIERCE PETROLEUM PILOT RESOURCES PINE MOUNTAIN OIL & GAS, INC. PINE PRAIRIE OIL CO. PINE RIDGE OIL & GAS, LLC PINNACLE MINING CORPORATION PINNACLE OPERATING PINTAIL PETROL. LTD. PINTAIL PETROLEUM LTD. PIONEER DRILLING PIONEER EXPLORATION COMPANY LLC PIONEER EXPLORATION COMPANY LTD PIONEER NATURAL RESOURCES PIONEER OIL COMPANY, INC. PISCES ENERGY, LLC PITCO INVESTMENTS PITCO PRODUCTION COMPANY PITTS ENERGY PITTS ENERGY COMPANY PITTS ENERGY COMPANY - US PLAINS PLAINS EXPLORATION & PRODUCTION COMPANY PLANO PETROLEUM, LLC PLANTATION OPERATING LLC PLATINUM ENERGY RESOURCES, INC. PLAYA OIL AND GAS, LP PLOVER PRODUCTION COMPANY PLYMOUTH EXPLORATION, LLC PMO POCO, LLC POGO POGO PANHANDLE 2004, LP POGO Panhandle 2004, LP PONDEROSA OIL & GAS, LLC POPP OPERATING, INC. POVERTY OIL, LLC POWELL, GENE POWER RES. OPER. PPC OPERATING COMPANY, LLC PRATER OIL & GAS OPERATIONS, INC. PRE RESOURCES, INC. PRECISION DRILLING PRECISION OPERATING PREMIER ENERGY, LLC PREMIER MINERALS, INC. PREMIER OIL & GAS PREMIER OIL & GAS, INC. PREMIUM WELL DRILLING, INC. PRENSORUS ENERGY, LLC PRESCO INC PRESCO WESTERN PRESCO WESTERN, LLC PRESCO WESTERN, LLC - US PRESCO, INC. PRESIDIO EXPLORATION PRESIDIO OIL COMPANY PRESTON EXPLORATION LLC PRESTON OIL CO. PRIDE PRIDE ENERGY PRIMA EXPLORATION, INC. PRIMA OIL AND GAS CO. PRIMARY NATURAL RESOURCES PRIMARY NATURAL RESOURCES, INC. PRIMARY PETROLEUM CORPORATION PRIME ENERGY PRIME NATURAL RESOURCES PRIME OPERATING PRIME OPERATING COMPANY PRIME OPERATING COMPANY - US PRIMERA ENERGY PARTNERS, LLC PRIMERO OPERATING PRIMERO OPERATING, INC. PRIMEWEST PETROLEUM INC. PRIMEX OPERATING PRIMEX OPERATING CORPORATION PRIMEXX OPERATING CORPORATION PRINCESS THREE CORP. PRINCETON NATURAL GAS, LLC PRIZE PETROLEUM, LLC PRO N.M. ENERGY, INC. PROBE OFFSHORE, LLC PROBE RESOURCES, LTD. PROBITY ENERGY PARTNERS, LLC PROBITY OPERATING, LLC PRODUCTION DRILLING, INC. PRODUCTION MANAGEMENT PRODUCTION MANAGEMT PROGRESS DRILLING, INC. PROLIFIC RESOURCES, LLC PRONGHORN OPERATING, LLC PROPEL ENERGY, LLC PROPERTY DEVELOPMENT GROUP, INC PROTEGE ENERGY, LLC. PROTON OPERATING COMPANY, LLC PROVIDENCE ENERGY PROVIDENT OPERATING COMPANY LLC PRUET PRODUCTION PRUET PRODUCTION CO PRUET PRODUCTION CO - US PRYOR PETROLEUM PULS, W L PUNA GEOTHERMAL PUNA GEOTHERMAL VENTURES PUNA GEOTHERMAL VENTURES - US PURE ENERGY PURE RESOURCES PURSUE ENERGY PURVIS OIL CORP. PURVIS OPERATING COMPANY PXP PXP LOUISIANA, LLC PYOTE WATER SYSTEMS, LLC PYRAMID OIL CO. Partee Drilling, Inc. Payne Exploration Petrosource Production Company, LP QEP RESOURCES, INC. QUAIL CREEK OIL CORPORATION QUALIA, C.F. OPER. QUANICO OIL AND GAS QUANTUM DRILLING CO QUANTUM ENERGY, INC. QUANTUM INDUSTRIES I QUANTUM RESOURCES MANAGEMENT, LLC QUEST CHEROKEE, LLC QUEST EXPLORATION QUEST EXPLORATION, LLC QUESTAR QUESTAR CORPORATION QUESTAR EXPLORATION AND PRODUCTION CO. QUICKSILVER RESOURCES QUINEX ENERGY CORPORATION QUINQUE OPERATING CO QUINTIN LITTLE COMPANY R & B OIL & GAS, INC. R & D EXPLORATION, LLC R C TAYLOR COMPANIES INC R E GAS DEVELOPMENT, LLC R&R DRILLING CO. R&R DRILLING COMPANY, LLC R. C. BENNETT COMPANY R. C. POLING CO. R. E. BLAIK, INC. R. K. PETROLEUM R. K. PETROLEUM CORPORATION R. K. PETROLEUM CORPORATION - US R. L. ADKINS CORP. R. LACY SERVICES, LTD. R. LACY, INC R. M. HILL OPERATING, INC. R. P. SMALL CORPORATION R. W. TYSON PRODUCING COMPANY, INC. R.L. CLAMPITT & ASSOCIATES R.L.A. RESOURCES RAAM GLOBAL ENERGY COMPANY RABALAIS OIL & GAS INC. RABALAIS, F.W. 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REGENCY GAS SERVICES, LLC. REGENERATION ENERGY CORPORATION REICHHOLD ENERGY REICHMANN PETROLEUM CORP REIF OIL & GAS COMPANY, LLC RELIANCE / STORY RELIANCE ENERGY, INC. RELIANCE OIL AND GAS, INC. RELIANCE OIL CO. RELIANCE OIL COMPANY RELIANCE WELL SERVICE REMINGTON RESOURCES REMNANT ENERGY, INC. REMORAL MANAGEMENT, LLC RENAISSANCE PETROLEUM COMPANY, LLC RENAISSANCE PETROLEUM, LLC RENEGADE OIL & GAS COMPANY REPSOLYPF REPUBLIC ENGRY INC REPUBLIC RES. CORP. REPUBLIC RESOURCES REPUBLIC RESOURCES, LLC RESACA RESOURCES, LLC RESERVE MANAGEMENT RESERVE MANAGEMENT, INC. RESOLUTE NATURAL RESOURCES RESOLUTE NATURAL RESOURCES COMPANY, LLC RESOLUTE WYOMING, INC. RESOURCE DRILLING, LLC RETAMCO OPERATING CO. REUTER EQUIPMENT CO. REVEILLE RESOURCES REVEILLE RESOURCES (TEXAS), INC. REX DRILLING COMPANY REX ENERGY CORPORATION REYNOLDS DRILLING COMPANY RHINO OPERATING COMPANY, LLC RICE OPERATING COMPANY RICELAND PETROLEUM RICELAND PETROLEUM COMPANY RICHARD W. THOMPSON RICHEY AND CO. RICHFIELD EXPLORATION COMPANY, INC. RICHLAND OIL COMPANY RICHLAND RESOURCES RICHMAN PETROLEUM CORP. RICHMOND DRILLING COMPANY RICHMOND PETROLEUM RICKY L TAYLOR RICOCHET ENERGY RICOCHET ENERGY INC RIDDLE ENGINEERING CORPORATION RIDDLE OIL CO RIDGE CREEK G AND O CO. RIDGE PETROLEUM, INC. RIDGELAKE ENERGY RIDGELAND WYOMING, INC. RIDGEWAY/ARIZONA OIL CORP. RIFE ENERGY OPERATING, INC. RIFE OIL PROPERTIES RILEY EXPLORATION, LLC RIM OPERATING, INC. RIMROCK ENERGY, LLC RIMROD CORPORATION RIO BRAZOS ENERGY CO. RIO PETROLEUM INC RIO-TEX RIO-TEX, INC. RIPPY OIL RIPPY OIL COMPANY, INC. RIPPY OIL COMPANY, INC. - US RISCO LA SARA OPERATIONS, LLC RISING STAR ENERGY RISING STAR ENERGY OPERATING CO., LLC RITCHIE EXPLORATION RITCHIE EXPLORATION, INC. RITCHIE EXPLORATION, INC. - US RIVER GAS CORP. RIVERSTONE ENERGY, LP RJD MANAGEMENT, INC. RK OIL PRODUCTION RKI EXPLORATION & PRODUCTION, LLC RLU OIL & GAS, INC. RMR OPERATING, LLC ROARING SPRINGS ENERGY, LTD. ROBERT E LANDRETH ROBERT E. BYRNE ROBERT E. 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ROSS, M., OIL AND GAS ROUND ROCK RESOURCES, INC. ROUNDTREE & ASSOC ROUNDTREE ASSOC., INC. ROWAN COMPANIES, INC. ROX EXPLORATION ROX EXPLORATION, INC. ROY E. KIMSEY, JR. ROYAL ENERGY RESOURCES, LTD ROYAL PRODUCTION CO. ROYAL PRODUCTION COMPANY, INC. ROYALE ENERGY INC. ROZEL ENERGY LIC ROZEL OPERATING ROZEL OPERATING COMPANY RR VENTURES LIMITED PARTNERSHIP RSC RESOURCES LIMITED PARTNERSHIP RSP PERMIAN, LLC RUBICON OIL AND GAS LLC RUBIN RESOURCES RUNNING FOXES PETROLEUM, INC. RUSK ENERGY MANAGEMENT, LLC RUSSELL D. MELOY RUSSELL HALBIRT RUSSELL OIL INC. RUSSELL-FORT TRINIDAD OP, LLC RUST OIL CORPORATION RUST, C. B. OIL CO. RUTHERFORD OIL CO. RUTHERFORD OIL CORPORATION RUTTER & WILBANKS CORP RUWCO OIL AND GAS RUWCO OIL AND GAS CORPORATION RYAN PETROLEUM CORP. RYDER SCOTT MANAGEMENT, LLC RYDER-SCOTT OIL CO RYHOLLAND FIELDER, INC. Rattler Oil & Gas Rockwell Petroleum S & W OIL & GAS, LLC S AND G INTERESTS, INC. S G INTERESTS S. B. OIL COMPANY S. B. STREET OPERATING, INC. S. GARY, JR. AND ASSOC. S. K. ROGERS OIL CO. S. LAVON EVANS S. LAVON EVANS, JR. OPERATING CO., INC. S.E.D.I. S.E.V. TEXAS OPERATING, LLC S.S.T. ENERGY CORP. S.W. JACK DRILLING S2 ENERGY, LLC SABCO SABCO OPERATING COMPANY SABCO OPERATING COMPANY, LLC SABER OIL AND GAS VENTURES, LLC SABINE CORP. SABINE OIL & GAS, LLC SABINE STORAGE AND OPERATIONS, INC. SABLE ENVIRONMENTAL, LLC SADDLE CREEK ENERGY DEVELOPMENT SAGA PETROLEUM SAGA PETROLEUM, LLC SAGE ENERGY SAGE ENERGY COMPANY SAGEBRUSH OIL AND GAS COMPANY, LLC SAGEBRUSH RESOURCES, LLC SAHARA OPERATING COMPANY SALIDA EXPLORATION, LLC SALINAS ENERGY SALT FORK OIL, LLC SALTWATER DISPOSAL OF NORTH DAKOTA, LLC SALTY MANAGEMENT, LLC SAMPSON OIL AND GAS USA MONTANA, INC. SAMSON SAMSON OIL & GAS USA, INC. SAN ISIDRO DEVELOPMENT COMPANY, LC SAN JOAQUIN BIT SERV SAN JOAQUIN BIT SERVICES SAN JUAN EXPL CO SAN JUAN RESOURCES SANCHEZ OIL & GAS SANCHEZ OIL AND GAS CORP. SANCHEZ OIL AND GAS CORP. - US SAND HILL FOUNDATION, LLC SANDALWOOD SANDERS OIL & GAS, LTD. SANDHAWK ENERGY, LLC SANDIA DRLG CO SANDIA TECHNOLOGIES, LLC SANDLIN OIL CORPORATION SANDRIDGE ENERGY SANDRIDGE TERTIARY, LLC SANDY SWD, LLC SANGUINE GAS EXPLORATION SANTA MARIA PACIFIC, LLC SANTANA ENERGY SERVICES, LLC SANTO RESOURCES INC. SANTOS SARITA ENERGY RESOURCES, LTD. SAUDER MANAGEMENT SAVANT ALASKA, LLC SAVOY OIL AND GAS SAXON OIL COMPANY, LTD. SAXUM OIL & GAS, LLC SAYE OIL COMPANY SBG 1804 FACILITY, LLC SBJ OIL & GAS SCHALK DEVELOPMENT SCHALK DEVELOPMENT COMPANY SCHALK OIL COMPANY, INC. SCHECK OIL COMPANY SCHECK OIL OPERATIONS SCHLUMBERGER SCHLUMBERGER IPM SCHOELLER OIL COMPANY SCHOFIELD OIL CO. SCHREINER OIL AND GAS INC SCION ENERGY INC. SCORPION EXPLORATION AND PRODUCTION, INC. SDB OIL & GAS, LLC SDG OPERATING SDOCO, LLC SDX RESOURCES SDX RESOURCES, INC. - US SE USA OPERATING, INC. SEA EAGLE FORD, LLC SEABOARD OIL CO SEAGULL OPERATING COMPANY, INC. SEC PRODUCTION, INC. SEDNA ENERGY, INC. SEDONA OIL AND GAS SEDONA OIL AND GAS CORPORATION SEELY OIL CO. 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SHARP IMAGE ENERGY, INX. - US SHD OIL & GAS, LLC SHELBY OPERATING COMPANY SHELBY RESOURCES, LLC SHELL SHELL EXPLORATION & PRODUCTION CO., INC SHELL ROCKY MOUNTAIN SHELL,UNITED STATES SHENANDOAH SHERIDAN PRODUCTION COMPANY, LLC SHERIDAN PRODUCTION PARTNERS SHERMAN DRILLING CO. SHERMAN DRLG. CO./IL SHIELDS ENERGY INC. SHIELDS EXPLORATION SHINNERY OIL CO INC SHOCO PRODUCTION, LP SHORE PETROLEUM CORPORATOIN SHORELINE ENERGY PARTNERS, LLC SHORELINE ENERGY, LLC SHORELINE SOUTHEAST LLC SHORELINE SOUTHEAST, LLC SHULER DRILLING.CO., INC. SIANA OIL & GAS CO, LLC SIANA OIL AND GAS, LLP SIERRA ENGINEERING SIERRA GEOTHERMAL POWER, INC. SIERRA RESOURCES SIERRA RESOURCES LLC SIERRA RESOURCES, INC. SIERRA RESOURCES, LLC SIGMON PROD. SIGNAL HILL PETROLEUM INC. SILCOR OILFIELD SERVICES, INC. SILVER CREEK DRILLING COMPANY SILVER CREEK OIL AND GAS, LLC SILVER CREEK RESOURCES, LLC (TX) SILVER OAK ENERGY, LLC SILVER OAK OPERATING INC. SILVER OIL AND GAS INC SILVER TUSK OPERATING CO., LLC SIMMONS ENERGY CORP. SIMRAY GROUP, LLC SIMRAY PRODUCTION COPANY, LP SINCLAIR DEVELOPMENT, LLC SINCLAIR OIL & GAS COMPANY SITE RESOURCES ONE, LLC SIVADCO, LTD. SK E&P Company SKLAR EXPLORATION SKLAR EXPLORATION COMPANY, LLC SKRIVANOS ENGINEERING INC. SLATE RIVER RESOURCES SLAWSON EXPLORATION SLOAN PETROLEUM, INC. SM ENERGY COMPANY SM OIL & GAS, INC SMC OIL AND GAS SMITH OPERATING AND MANAGEMENT COMPANY SMITH PRODUCTION CO. SMITH PRODUCTION COMPANY, INC. SMITH PRODUCTION, INC. SMITH, E.N. ENERGY SNYDER PARTNERS SOCORRO ENERGY INC SOCORRO EXPLORATION, INC. SODERSTRUM, GLEN S. SOFAMCO INC. SOJITZ ENERGY VENTURE, INC. SOJOURNER DRILLING CORPORATION SOJOURNER DRLG CORP SOLIMAR ENERGY, LLC SONERRA RESOURCES SONERRA RESOURCES CORPORATION SONTERRA OPERATING, INC. SOONER OIL & GAS MANAGEMENT, INC. SOURCE ENERGY CORPORATION SOURCE ENERGY MIDCON, LLC SOUTH BAY RESOURCES SOUTH CARLTON OPERATING COMPANY SOUTHERN BAY OPERATING, LLC SOUTHERN EXPLORATION SOUTHERN RESOURCE COMPANY SOUTHERN RESOURCES SOUTHERN STAR OPERATING SOUTHERN TRIANGLE OIL CO. SOUTHLAKE EXPLORATION, INC. SOUTHLAKE OPERATING, LLC SOUTHSTONE ENERGY, LLC SOUTHWEST ENERGY SOUTHWEST OPERATING INC. SOUTHWEST ROYALTIES SOUTHWESTERN SOVEREIGN PETROLEUM COMPANY, LLC SPARTAN OPERATING COMPANY, INC. SPECIAL ENERGY CORP. SPECIAL ENERGY CORPORATION SPECTRA ENERGY CORP SPECTRA ENERGY TRANSMISSION SPELLER OIL CORPORATION SPESS OIL CO. SPICER OIL COMPANY, INC. SPINDLETOP ENERGY, LLC SPINDLETOP OIL & GAS COMPANY SPINDLETOP OIL CO. SPINGAS ENERGY, INC. SPINNAKER EXPLORATION SPIRAL ENERGY CORPORATION SPN RESOURCES, LLC SPOONER PETR CORP SPOONER PETROLEUM COMPANY SPOONER PETROLEUM CORPORATION SPRING DRILLING CORPORATION SPRING OPERATING COMPANY SPRING RESOURCES SPRING RESOURCES, INC. SPRING, HARRY A. SPYGLASS ENERGY GROUP, LLC SQUARE MILE ENERGY SQUARE MILE ENERGY, LLC ST MARY ST OIL COMPANY ST. JAMES ENERGY OPERATING, INC. STAAB OIL CO STALEY OPERATING STALEY OPERATING COMPANY STALLION STALLION ENERGY, INC. STALNAKER ENERGY CORPORATION STALNAKER, GENE STANDARD DRILLING STANFORD ENERGY, INC. STANOLIND OIL AND GAS CORP STANOLIND OPERATING CORPORATION STANOLIND OPERATING, LLC STAR ENERGY STAR OF TEXAS ENERGY SERVICES STAR PRODUCTION, INC. STATOIL STATOIL STECKMAN RIDGE, LP STELBAR OIL CORP INC STELBAR OIL CORPORATION, INC STELLAR ENERGY, LLC STELLER ENERGY STELZER DRLG CO STEPHENS AND JOHNSON OPERATING STEPHENS AND JOHNSON OPERATING COMPANY STEPHENS ENERGY COMPANY, LLC STEPHENS EXPLORATION, INC. STEPHENS PROD CO STEPHENS PRODUCTION COMPANY STEPHENS PRODUCTION CO STERLING DRILLING COMPANY STERLING PETROLEUM STETSON OIL & GAS CORPORATION STETSON PETROLEUM CORPORATION STEWARD ENERGY, LLC STEWART PETROLEUM CORPORATION STINGRAY WELLS, LLC STM OIL & GAS, LLC STONE STONE ENERGY (LA) STONE ENERGY (WV) STONEGATE PRODUCTION COMPANY, LLC STORM CAT ENERGY (USA) OPERATING CORP. STORM CAT ENERGY CORPORATION STORM PEAK ENERGY, LLC STOUT ENERGY, INC. STOVALL OPERATING STRACHAN EXPLORATION STRACHAN EXPLORATION, NC. STRAND ENERGY STRAND ENERGY, LC STRAT LAND EXPLORATION STRATA EXPLORATION, INC. STRATA OPERATING COMPANY, INC. STRATA PRODUCTION STRATA PRODUCTION COMPANY STRATASEARCH CORPORATION STRATEGIC AMERICAN OIL CORPORATION STRATLAND EXPLO. CO. STRAWN SALT WATER DISPOSAL CORPORATION STREAM ENERGY, INC. STRIKE OIL, INC. STROUD ENERGY, LIMITED STROUD OIL PROPERTIES STROUD PETROLEUM STROUD PETROLEUM, INC. 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TEXAS CRUDE OIL, INC TEXAS ENERGY SERVICES, LLC TEXAS GAS TRANSMISSION CORPORATION TEXAS GAS TRANSMISSION, LLC TEXAS INDEPEND.EXPLO TEXAS INDEPENDENT EXPLORATION, LTD. TEXAS INTERNATIONAL OPERATING, LLC TEXAS INTERNATIONAL RESOURCE, LLC TEXAS LAND AND TRAD CO TEXAS LONE STAR OPERATING COMPANY, LLC TEXAS OPERATING & CONSULTING, LLC TEXAS PETROLEUM CO TEXAS PETROLEUM INVESTMENT COMPANY TEXAS ROYALTY TEXAS ROYALTY CORPORATION TEXAS STANDARD OIL OPERATING CO. TEXAS UNITED PRODUCTION COMPANY, LLC TEXAS-OKLA PROP. INC TEXCAL ENERGY TEXCAL RESOURCES, INC. TEXCEL EXPLORATION, INC. TEXLAND DRILLING COMPANY TEXLAND DRLG CO TEXLAND PETR INC TEXLAND PETROLEUM, INC. TEXLAND PETROLEUM-HOBBS, LLC TEXOMA DRLG AND PROD TEXON OIL CO. TEXOZ E&P HOLDINGS, INC. TEXSTAR MIDSTREAM UTILITY, LP TGO OPERATING, LLC TGP DIXIE DEVELOPMENT COMPANY, LLC TGT PETROLEUM CORP. THE 7711 CORP THE 7711 CORPORATION THE CORYELL-OUACHITA GROUP, INC. THE EXPLORATION CO THE EXPLORATION COMPANY THE GRAYROCK CORPORATION THE HOUSTON EXPLORATION COMPANY THE MCBEE COMPANY THE QUINTIN LITTLE COMPANY, INC. THE REDMON OIL COMPANY THE RIVER GAS CORPORATION THE TERMO COMPANY THE WINDOW OPERATING COMPANY THERMASOURCE INC. THERMASOURCE LLC THERMASOURCE, INC. THOMAS L. SPRING THOMAS M. BROWN, LLC THOMAS OIL & GAS, INC. THOMAS OPERATING CO THOMAS OPERATING COMPANY, LTD. THOMASON PETROLEUM, INC. THOMPSON ENGINEERING & PRODUCTION CORP. THOMPSON, J. CLEO THOROUGHBRED THOROUGHBRED ASSOCIATES, LLC THORP PETROLEUM CORP. THORP PETROLEUM CORPORATION THREE FORKS OPERATING COMPANY, LLC THREE J'S PETROLEUM, INC. THREE RIVERS OPERATING COMPANY II, LLC THREE RIVERS OPERATING COMPANY, LLC THREE SPAN OIL AND GAS THREE-R DRILLING AND PRODUCTION THRESHOLD DEVELOPMENT THUMS THUNDERBIRD DRILLING THURMAN DRILLING, INC. THURSTON ENERGY OPERATING COMPANY, LLC THYSSEN MINING CONSTRUCTION OF CANADA TIBURON RESOURCES, INC. TIDAL PETROLEUM, INC. TIDELANDS OIL PRODUCTION TIDEWATER OIL AND GAS COMPANY, LLC TIERRA EXPLORATION TIGER OIL TILLETT TOOL TIMBERLINE PRODUCTION CO., LLC TIPCO TITAN DRILLING CO. TITAN ENERGY INC. TITAN OIL AND GAS CORP. TITAN OPERATING, LLC TITAN RESOURCES TKP PETROLEUM, INC. TMR EXPLORATION TMR EXPLORATION CO. TNT OPERATING COMPANY, INC. TNT OPERATING, LLC TNT OPERATING, LLC (MS) TOCE ENERGY, LLC TOCE OIL COMPANY TOKLAN OIL & GAS CORPORATION TOKLAN OIL CORP TOLAR DISPOSAL SYSTEMS, LP TOM BROWN TOM E. JOHNSON TOP DRILLING INC. TOP DRILLING, INC. TOP OPERATING COMPANY TORCH ENERGY TORCH ENERGY ADVISORS, INC. TORCH ENERGY SERVICES, INC. TOTAL TOWNE EXPLORATION COMPANY TOWNE, E. B. TOWNER PETROLEUM CO. TRACKER RESOURCE DEVELOPMENT II, LLC TRACKER RESOURCE DEVELOPMENT LLC TRADITION RESOURCES, LLC TRAIL RIDGE ENERGY PARTNERS, LLC TRAILBLAZER DRILLING CORP TRANS-PACIFIC DRILLING, INC. TRANS-TEXAS ENERGY TRANSATLANTIC PETROLEUM USA TRANSENERGY, INC. TRANSOCEAN TRANSPRO ENERGY, LLC TRANSTEXAS GAS CORP. 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TWISTED CEDAR RESOURCES, LLC TXCL DRILLING CORP. TXD SERVICES LP TXP INC TYCOON ENERGY, INC. TYEE PRODUCTION CO LLC. TYLER OIL COMPANY TYLER ROCKIES EXPLORATION, LTD. TYNER TEXAS OPERATING Texas Transco, Inc. U. S. DEPARTMENT OF ENERGY U.S. ENERCORP, LTD. U.S. ENERGY DEVELOPMENT CORPORATION U.S. EXPLORATION CO. U.S. EXPLORATION CORPORATION U.S. GEOTHERMAL INC. U.S. OIL & GAS PLC U.S. OPERATING INC ULTRA ULTRA OIL AND GAS ULTRASTAR PETROLEUM, LLC UNDERGROUND ENERGY, INC. UNDERGROUND SERVICES MARKHAM LP UNIOIL UNION DRILLING, INC. UNION GAS OPERATING UNION GAS OPERATING COMPANY UNION ROYALTY, INC. UNION VALLEY PETROLEUM CORPORATION UNISON DRILLING CO. UNISON DRILLING, INC. UNIT UNIT OPERATIONS, INC UNITED UNITED OPERATING CO. UNITED PET DRLG. CO. UNITED PETROLEUM DRILLING CO. UNITED PRODUCTION CO UNITED RESOURCES UNITED RESOURCES LP UNITEX OIL & GAS, LLC UNIVERSAL RESOURCES UNKNOWN CUSTOMER UNOCAL UPHAM OIL AND GAS CO. UPLAND RESOUCES, INC UPLAND RESOURCES, LLC UPLANDS RESOURCES UPSTREAM PROPERTIES, LLC UPTON RESOURCES URSA RESOURCES, LLC US ENERCORP US ENERGY PARTNERS, INC. US OPERATING USEDC OKC, LLC USG OREGON, LLC UTAH GREAT EAGLE, LLC UTE ENERGY, LLC V. F. NEUHAUS PROPERTIES V. F. PETROLEUM, INC. VA RESOURCES VA RESOURCES, LLC - US VAALCO ENERGY, INC. VAL ENERGY, INC. VALENCE VALENCE OPERATING COMPANY VALHALLA EXPLORATION, LLC VALPOINT ENERGY, LLC VANGUARD OIL & GAS LLC VANGUARD PERMIAN, LLC VANISHING WATER, LLC VANTAGE ENERGY UINTA, LLC VANTAGE ENERGY, LLC VANTAGE FORT WORTH ENERGY, LLC VAQUERO ENERGY COMPANY VAQUERO RESOURCES, LLC VARGAS ENERGY, LTD. VAUGHN GOOD OIL CO VAUGHN PETROLEUM INC. VECTA OIL & GAS, LTD VECTOR OIL & GAS, LP VECTRA CBM LLC VENADA NATIONAL VENADO OIL & GAS, LLC VENOCO VENOCO INC. VENTANA MINERALS, LLP VENTEX OPERATING VENTEX OPERATING CORPORATION VENTUM OIL & GAS, LP VENTURA ENERGY MANAGEMENT, LLC VENTURE OIL AND GAS VENTURE OIL AND GAS, INC. VENTURE OIL AND GAS, INC. - US VENTURE RESOURCES VENTURE RESOURCES, INC. VERADO ENERGY INC VERITAS ENERGY, LLC VERITAS PE, LLC VERN JONES OIL AND GAS CORPORATION VESS OIL CORP. VESS OIL CORPORATION VETRA EXPLORATION & PRODUCTION, LLC VIATHON HYDROCARBONS, INC VICTORIA OPERAT. CO. VIKING DRILLING COMPANY VIKING DRLG CO VIKING RESOURCES CORPORATION VINCENT LANDAS VINCENT OIL CORPORATION VINLAND ENERGY, LLC VINTAGE VINTAGE CALIFORNIA PRODUCTION VINTAGE CALIFORNIA PRODUCTION LLC VIRGIN OFFSHORE VIRTEX OPERATING COMPANY, INC. VIRTEX PETROLEUM VIRTEX PETROLEUM COMPANY, INC. VISION EXPLOR AND PROD LLC VISION NATURAL RESOURCES, LP VISTA CORPORATION VISTA OPERATING INC. VISTA RESOURCES INC VITOL RESOURCES INC. VITRUVIAN EXPLORATION, INC. VONCO OF MISSISSIPPI VOSKAMP EXPL., INC. VOSKAMP EXPLORATION, INC. VOYAGER ENERGY, LLC VOYAGER GAS CORPORATION VOYAGER PETROLEUM INC. VPR OPERATING, LLC VULCAN ENERGY CORP VULCAN POWER COMPANY VULCAN POWER COMPANY, LLC (NV) W & T OFFSHORE W & T OFFSHORE INC. W. A. MONCRIEF W. B. CLEARY PETROLEUM COMPANY W. G. ARNOT, JR. W. M. H. LACKEY OIL AND GAS W. R. Willliams, Inc. W.G. HELIS ESTATE W.S.F., INC. WADI PETROLEUM, INC. WAGNER WAGNER AND BROWN WAGNER OIL COMPANY WAHA STORAGE AND TRANSPORTATION, LP WALKER, KEITH F. WALLIS ENERGY, INC. WALSH AND WATTS, INC WALSH OPERATING CO. WALSH PETROLEUM WALSH PRODUCTION INC WALSH RESOURCES, INC. WALSH,F.HOWARD OPER. WALTER EXPLORATION WALTER EXPLORATION, INC WALTER EXPLR INC WALTER OIL & GAS WALTER OIL & GAS CORPORATION WALTER OIL AND GAS CORPORATION WAPITA ENERGY, LLC WARD PETROLEUM WARD PETROLEUM CORPORATION WARD WILLISTON CO WARREN AMER. OIL CO. WARREN AMERICAN OIL CO. WARREN EXPLORATION WARREN EXPLR WARREN OIL AND GAS CO. WARREN PETROLEUM WARREN RESOURCES, INC. WASHITA OIL & GAS, LLC WASSER INVESTMENTS, LLC WASSON SOLID WASTE DISPOSAL SYS LTD. WATERFORD OPERATING, LLC WB OSBORN OIL AND GAS OPER WB OSBORN OIL AND GAS OPERATIONS WBH ENERGY PARTNERS, LLC WCS OIL & GAS CORPORATION WCS PETR WCS PETROLEUM WEATHERFORD WEATHERS EXPLORATION, INC. WEBB COUNTY UNLIMITED RESOURCES, LLC WEBER ENERGY WEBER ENERGY CORPORATION WEEKS EXPLORATION WEINKAUF PETROLEUM, INC. WEISER-BROWN OIL CO WEISER-BROWN OPERATING COMPANY WELDER EXPLORATION WELDER EXPLORATION, INC. WELHAUSEN OPERATING WELLCO WELLHAUSEN PETROLEUM WELLING RESOURCES, LLC WELLSTAR CORPORATION WELTER CONSULTING, INC. WEN-BE WERTH EXPLORATION TRUST WESCO OPERATING, INC. WEST BAY EXPLORATION WEST BAY EXPLORATION COMPANY WEST DRILLING COMPANY WEST INLAND ENERGY WEST MOUNTAIN OPERATING CO., INC. WEST NEWPORT OIL COMPANY WEST OK DISPOSAL, LLC WEST STAR OPERATING COMPANY WEST TEXAS GAS WEST TULETA OPERATING CORP. WESTALL, RAY WESTAR ENERGY, INC. WESTERLY EXPLORATION, INC. WESTERN CHIEF OIL & GAS WESTERN GEOPOWER INC. WESTERN NEW YORK DRILLING ASSOCIATION, LLP WESTERN OIL WESTERN OIL & GAS WESTERN OPERATING CO WESTERN OPERATING COMPANY WESTERN PROD WESTERN PROD. CO. WESTERN PRODUCTION COMPANY WESTERN RESERVES OIL COMPANY, INC. WESTERN WELL SERV. WESTPORT WESTRIDGE OIL & GAS PROPERTIES WESTSIDE ENERGY OP, CO., LP WFD OIL CORP WFD OIL CORPORATION WG OPERATING, INC. WHEELER ENERGY WHEELER ENERGY CO. WHEELER ENERGY, LLC WHEELER OIL COMPANY WHIT-MAR EXPLORATION COMPANY WHITE EAGLE EXPL. WHITE EAGLE EXPLORATION WHITE OAK OPERATING WHITE OAK PROD. CO. WHITE PINE PETROLEUM CORPORATION WHITE RIVER ENERGY, LLC WHITE ROCK EXPLORATION, INC. WHITEHEAD DRILLING WHITEHEAD PRODUCTION COMPANY WHITING PETROLEUM WHITMAR EXPLORATION WHITSON, JAMES A WHITTIER OPERATING, INC. WHITTIER, M. H. CORP WICHITA WATER, LLC WICKLUND PETROLEUM CORPORATION WIEPKING-FULLERTON WIEPKING-FULLERTON ENERGY, LLC WIEPKING-FULLERTON ENERGY, LLC - US WILBANKS RESERVE CORPORATION WILCO OIL AND GAS WILCOX OPERATING CORPORATION WILD GOOSE STORAGE, INC. WILD HORSE RESOURCES, LLC WILDGOOSE GAS WILDHORSE RESOURCES, LLC WILL-DRILL PROD. WILL-DRILL PRODUCTION WILL-DRILL RESOURCES, INC. WILLIAMS WILLIAMS BROS ENG CO WILLIAMS COMPANIES, INC. WILLIAMS DRLG CO WILLIAMS OIL CO. WILLIAMS OIL COMPANY WILLIAMS OIL COMPANY - US WILLIAMS OIL PROPERTIES, INC. WILLIAMS PETROLEUM WILLIAMS PRODUCTION WILLIAMS PRODUCTION APPALACHIA, LLC WILLIAMSON, J C WILLIFORD ENERGY CO WILLO OIL AND GAS EXPLORATION WILLOW CREEK RESOURCES WILLOWBEND INVESTMENTS INC. WILLSTAR ENERGY, GP, LLC WILTON PETROLEUM, INC. WINCHESTER ENERGY WINCHESTER PRODUCTION WIND RIVER ENERGY WINDRUSH OPERATING COMPANY WINDSOR ENERGY WINDSOR ENERGY GROUP, LLC WINDSOR ENERGY GROUP, LLC - US WINDSOR ENERGY, INC. WINDSOR OIL AND GAS WINN EXPLORATION WINN EXPLORATION CO WINNWELL EXPLORATION WINSTON LAND & CATTLE CO. WISER OIL CO. WISHBONE OPERATING, LLC WM KS ENERGY RESOURCES, LLC WMS OIL COMPANY WN OPERATING, INC. WOLD OIL AND GAS WOLF ENERGY, INC. WOLF EXPLORATION, INC. WOLVERINE GAS & OIL WOLVERINE GAS AND OIL IN WOLVERINE GAS AND OIL INC. WOOD ENERGY, INC. WOODBINE ACQUISITION CORPORATION WOODBINE ACQUISITION, LLC WOODBINE PRODUCTION CORPORATION WOODSIDE ENERGY WOODWARD IODINE CORP WOOLSEY OPERATING COMPANY, LLC WPX ENERGY INC. WRIGHT TRUCKING, INC. WTG EXPLORATION, INC WWXPLORATION, LLC WYNN CROSBY ENERGY WYNN-CROSBY ENERGY, INC. WYOMING RESOURCES Washita Oil & Gas, LLC Wind River II Corporation Winston Land & Cattle Co. Woodside Energy X-APC ENERGY, INC. XERIC OIL AND GAS XOG OPERATING, LLC XPLORE ENERGY, INC. XPLORE OPERATING, LLC XSTAR RESOURCES, LLC XTO ENERGY XTRA ENERGY CORP XTREME OIL & GAS, INC. YALE OIL ASSOC. YALE OIL ASSOCIATION, INC. YATES DRILLING YATES ENERGY CO YATES PETROLEUM CO YOST OIL OPERATING YOUNG, M.R., OIL CO. YOUNGER ENERGY COMPANY YUCCA ENERGY INC. YUCCA OIL COMPANY YUKON OPERATING COMPANY, LLC YUMA PETROLEUM ZACHARY OIL OPER. ZACHRY EXPLORATION, INC. ZACKSON RESOURCES ZARGON OIL & GAS LTD ZARGON OIL & GAS, LLC ZAVALA INDEPENDENT GAS, INC ZAVANNA, LLC ZAZA ENERGY, LLC ZENERGY ZENERGY OPERATING COMPANY, LLC ZEPHYR OPERATING COMPANY LLC ZINKE & TRUMBO ZINSZER OIL COMPANY ZODIAC ENERGY, LLC ZONE ENERGY, LLC ZP DISPOSAL SYSTEMS, LLC _______________________________ zO.I.L. ENERGY INC zTED - UNKNOWN