- Bradley Operating Co Inc
- Brana Corp
- Branch Oil & Gas Inc
- Brandon Energy
- Brashear Oil Co
- Braumiller & Braumiller Inc
- Brawley Petroleum Corp
- Brechtel Energy Inc
- Breckenridge Exploration Co
- Breitenbach Petroleum Corp
- Breitenbach Petroleum Corp
- Brent Baker Drilling Inc
- Bretagne
- Breton Sound Resources LLC
- Brett Exploration
- Brewer Co
- Brg Energy Inc
- BRG Petroleum
- BRG Petroleum
- BRI Consulting Group Inc
- Brian R Stephens Operating
- Briar Energy Corp
- Bridge Energy Corp
- Bridge Petroleum
- Bridge Petroleum
- Bridger Ski Foundation
- Bridwell Oil Co
- Bridwell Oil Co
- Bridwell Systems Corp
- Brigham Exploration Co
- Brigham Oil & Gas LP
- Bright & Co
- Brighton Energy LLC
- Brinkerhoff Co
- Brinkerhoff Co
- Brisita Energy Corp
- British Acadian LTD Inc
- British Borneo Exploration
- British Gas
- Britton Operating Inc
- Broad Street Financial Co
- Brookston Resources Inc
- Broughton Operating Corp
- Brower Oil & Gas Co
- Brower Oil & Gas Co Inc
- Browning Oil Co
- Browning Oil Co Inc
- Brownlie Wallace Armstrong
- Brownlie Wallace Armstrong
- Broyles Investments
- Bruce Arndt
- Bruce Cunyus Independent Land
- Bruce K Hightower
- Bruce M Mc Intyre
- Bruce Mc Clymond
- Bruce Spindler Office
- Brumark Corp
- Brunton Exploration Co Inc
- Bruxoil
- Bryan P Ratliff
- Bryan P Ratliff
- Bryan Royalty
- BTE Energy LLC
- Buckeye Exploration Co
- Bucking Horse Distributing
- Buckingham Oil
- Buena Vista
- Buffalo Petroleum
- Bukwheat Reasorses
- Bull Creek Resources Inc
- Bunker Hill Assoc
- Burchett Oil Co
- Burchett Oilco
- Burg Geo-Consulting Inc
- Burg Geo-Consulting Inc
- Burk Royalty Co
- Burk Royalty Co
- Burlington Resources
- Burlington Resources
- Burlington Resources
- Burlington Resources Intl
- Burnett Corp
- Burnett Oil Co
- Burns Energy
- Burr Oil & Gas Inc
- BWAB Inc
- BWAB Inc
- Bxp Co LLC
- Bxp Co LLC
- Byers Petroleum Inc
- Byrd Operating Co
- Byron Fields
- C & C Equipment Specialist
- C & C Well Svc
- C & S Energy Svc Inc
- C B Energy LLC
- C E Heilmann Land Svc LTD
- C G Operations Inc
- C Mark Crawford Oil & Gas
- C S Mc Cain Oil Co
- Cabeza Oil & Gas LLC
- Cabot Oil & Gas Corp
- Cabot Oil & Gas Corp
- Cabot Oil & Gas Corp
- Cabot Oil & Gas Corp
- Cabot Oil & Gas Corp
- Cabot Oil & Gas Corp
- Cabot Oil & Gas Corp
- Cabot Oil & Gas Corp
- Cabot Oil & Gas Corp
- Cabot Oil & Gas Corp
- Cabot Oil & Gas Corp
- Cabot Petroleum Corp
- Cachco Investments
- Cachco Investments
- Caddo Creek Corp
- Caddo Management Inc
- Caledonia Natural Gas District
- Calfrac Well Svc
- Calfrac Well Svc
- California Hydrocarbons Corp
- Callon Petroleum Co
- Callon Petroleum Co
- Calpetco Inc
- Caltek Minerals Corp
- Calto Operating Inc
- Calumet Oil Co
- Calvary Consulting LLC
- Calvin Resources Inc
- Calvin Resources Inc
- Cam West II LP
- Cam West II LP
- Cam West Inc
- Cam West Inc
- Cambrian Hunter Inc
- Cambridge Production Inc
- CAMC Holdings
- CAMC Holdings
- Camden Energy Corp
- Camden Resources Inc
- Cameron Oil & Gas Co
- CAMEX Operating Co
- Campex Co
- Campex Co
- Can-Tex Energy Corp
- Cana Resources
- Canaan Resources LLC
- Canadian Lone Star Oil & Gas
- Canadian Lone Star Oil & Gas
- Canfield Oil & Gas Corp
- Cannon Energy
- Canonie Energy Inc
- Canyon Energy Inc
- Canyon Investments Inc
- Capataz Operating Inc
- Capital C Energy LLC
- Capital Energy Group Inc
- Capital Programs Inc
- Capitol Energy Inc
- Capitol Exploration Inc
- Capstone Oil & Gas Co
- Caravela Exploration Co LLC
- Caravela Exploration Co LLC
- Carbon Oil
- Cardinal Resources Inc
- Carl E Gungoll Exploration Inc
- Carla Petroleum Inc
- Carlow Corp
- Carlton Energy Group
- Carmac Energy Corp
- Carmony Exploration ILC
- Carmony Exploration ILC
- Carmony Exploration ILC
- Carnes Exploration Co
- Carnes Oil Corp
- Carolina Oil & Gas Inc
- Carper Well Svc
- Carrizo Oil & Gas Inc
- Carrizo Oil & Gas Inc
- Carrland Oil & Gas Inc
- Carrland Oil & Gas Inc
- Carson Energy Inc
- Carter Petroleum Corp
- Carter Production Co
- Carter-Langham Inc
- Caruthers Producing Co
- Cascade Exploration Corp
- Case Pomeroy
- Caslano On Lake Austin
- Caslano On Lake Austin
- Caspen Oil Inc
- Castaneda Consulting LLC
- Castelli Exploration Inc
- Castle Energy Corp
- Castle Gas Corp
- Castle Valley Gas Producer
- Castle-Rock Petroleum Inc
- Castleguard Energy Inc
- Castleguard Energy Inc
- Castlepeak Resources
- Castlerock Resources Inc
- Catapult Exploration
- Catapult Exploration
- Catapult Exploration LLC
- Cates Petroleum Consulting Inc
- Cathey Oil Inc
- Cavalier Petroleum Corp
- Cavalier Petroleum Corp
- Cavalier Petroleum Corp
- Cavi Tech Intl
- Caza Drilling
- Cazar Energy
- Cazar Energy
- CBL Resources
- CDX Charles Edwards
- CDX Gas LLC
- CEC Resources LTD
- CEC Resources LTD
- Cedar Creek Resources
- Cedar Ridge LLC
- Cedar Ridge LLC
- Cedar Strat Corp
- Cedarhill Operating Co
- Cedyco Corp
- Cedyco Corp
- CEJA Corp
- Ceja Corp
- Celero Energy
- Celestine Energy Inc
- Cemtech Consulting
- Cenesia Petroleum Corp
- Ceniza Petroleum
- Centaur Petroleum Corp
- Center Point Energy Field Svc
- Centerpoint Resources Inc
- Centerra Energy Corp
- Centerra Energy Corp
- Central Crude Inc
- Central Crude Inc
- Central Operating Inc
- Central Operating Inc
- Central Plains Oil & Gas Corp
- Central Resources Inc
- Central Resources Inc
- Centrex Operating Co
- Centurion Energy Corp
- Centurion Exploration
- Centurion Exploration
- Century Energy Management
- Century Geophysical Corp
- Century Onshore Exploration Co
- Century Resources Inc
- Century Royalty LLC
- Ceres Capital Partners
- Certex USA Inc
- CGAS Exploration
- CH4 Energy
- Ch4 Energy LLC
- Chaco Energy Co
- Chaco Energy Co
- Chalcam Exploration
- Chalk Hill Resources Inc
- Challenge Operating Inc
- Champ Oil Co
- Champion Exploration Corp
- Champion Group
- Champion Group
- Champion Group
- Champlin Exploration Inc
- Chandler Energy
- Chandler Energy
- Chaparral Energy Inc
- Chaparral Exploration Inc
- Chaparral Inc
- Charis Energy
- Charles E Mc Ray & Assoc
- Charles L Cherry & Assoc
- Charles M Mc Cann
- Charlie Hudson & Assoc
- Charter Oak Production Co
- Chase Petroleum Corp
- Chase Petroleum Corp
- Chase Production Co
- Chateau Oil & Gas Inc
- Chautauqua Energy Inc
- Chelsea Corp
- Chelsea Corp
- Chelsea Energy Inc
- Chemily Management Co
- Cheniere Energy Operating Co
- Chernico Exploration Inc
- Cherokee Exploration Co
- Cherokee Minerals
- Cherokee Production
- Chesapeake Energy
- Chesapeake Energy
- Chesapeake Energy
- Chesapeake Energy Corp
- Chesapeake Operating Inc
- Chesapeake Operating Inc
