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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Cordillera Corporation | Wyoming | 0 BBLs | 0 MCF | May 1978 - Dec 1986 |
| Core Exploration | Wyoming | 0 BBLs | 0 MCF | Sep 2001 - Jul 2004 |
| Cork Petroleum Corporation | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Apr 2012 |
| Corkill Drilling Corporation | Wyoming | 0 BBLs | 0 MCF | Sep 2002 - May 2016 |
| Cornerstone Natural Resources LLC | Wyoming | 0 BBLs | 0 MCF | Apr 2004 - Jan 2014 |
| Coronado Oil Company | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Dec 2019 |
| Corrida Oil Inc | Wyoming | 0 BBLs | 0 MCF | Aug 1979 - Jun 1990 |
| Cortez Energy Inc | Wyoming | 0 BBLs | 0 MCF | Sep 1991 - Sep 2004 |
| Cosner CBM LLC | Wyoming | 0 BBLs | 0 MCF | Mar 2008 - Jun 2009 |
| Costilla Energy Inc | Wyoming | 0 BBLs | 0 MCF | Jan 1994 - Jun 1999 |
| Cotton Petroleum Corporation | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Jan 1987 |
| Cottonwood Oil Inc | Wyoming | 0 BBLs | 0 MCF | Aug 1981 - Jun 1988 |
| Coulter Oil & Gas LLC | Wyoming | 0 BBLs | 0 MCF | Jun 2012 - Dec 2017 |
| Cowan Oil Company | Wyoming | 0 BBLs | 0 MCF | Jan 1988 - Sep 1990 |
| Cowboy Clean Fuels LLC | Wyoming | 0 BBLs | 10,427 MCF | Jul 2022 - Feb 2024 |
| Cox Edwin L & Berry R | Wyoming | 0 BBLs | 0 MCF | Jun 1981 - Oct 1987 |
| Cox Kendall Jay | Wyoming | 0 BBLs | 0 MCF | Mar 1994 - Aug 2016 |
| Cox R D | Wyoming | 0 BBLs | 0 MCF | Jan 1981 - Mar 1995 |
| CR Energy | Wyoming | 0 BBLs | 0 MCF | May 1985 - Dec 1992 |
| Cramer Oil Company | Wyoming | 0 BBLs | 0 MCF | Jan 1991 - Aug 2012 |
| Crawley Petroleum Corporation | Wyoming | 0 BBLs | 0 MCF | May 1991 - Sep 2007 |
| Cree Co | Wyoming | 0 BBLs | 0 MCF | Feb 2007 - Feb 2007 |
| Creek Oil Company | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Aug 2001 |
| Crescent Oil & Gas Corporation | Wyoming | 0 BBLs | 0 MCF | Jan 1984 - May 1994 |
| Crest Resources Inc | Wyoming | 277 BBLs | 0 MCF | Dec 2021 - Feb 2024 |
| Crimm Drilling Inc | Wyoming | 0 BBLs | 0 MCF | Oct 1979 - Dec 1989 |
| Crow Creek Operating Co | Wyoming | 0 BBLs | 0 MCF | Apr 2004 - Aug 2004 |
| Crowell'S Joyce Corporation | Wyoming | 0 BBLs | 0 MCF | Feb 1988 - Sep 1994 |
| Crowheart Energy LLC | Wyoming | 284,152 BBLs | 7,591,066 MCF | Feb 2018 - Jan 2024 |
| Crown Central Petroleum Corp | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Dec 1999 |
| Crown Energy Partners LLC | Wyoming | 0 BBLs | 0 MCF | Mar 2010 - Sep 2013 |
| Crown Oil & Gas Co Inc | Wyoming | 0 BBLs | 0 MCF | Jan 1996 - Jan 2023 |
| Crown Oil & Minerals Inc | Wyoming | 0 BBLs | 0 MCF | Oct 1980 - Feb 1982 |
| Crystal Exploration & Production Company | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Feb 1995 |
| Crystal Oil Company | Wyoming | 0 BBLs | 0 MCF | Mar 1979 - Dec 1983 |
| CSG Exploration Co | Wyoming | 0 BBLs | 0 MCF | Jan 1982 - Sep 1982 |
| Cumberland Operating LLC | Wyoming | 338 BBLs | 22,461 MCF | Oct 2015 - Feb 2024 |
| Cundy R L | Wyoming | 0 BBLs | 0 MCF | Jan 1987 - Aug 1991 |
| Custom Energy Construction Inc | Wyoming | 0 BBLs | 0 MCF | Oct 1989 - Dec 1991 |
| Czar Resources Inc | Wyoming | 0 BBLs | 0 MCF | Jan 1982 - Dec 1991 |
| D & B Oil Company | Wyoming | 0 BBLs | 0 MCF | Jan 1992 - Mar 1993 |
| D & D Contract Pumping Inc | Wyoming | 0 BBLs | 0 MCF | May 2013 - Mar 2024 |
| D & J Oil Company | Wyoming | 0 BBLs | 0 MCF | Jan 1986 - Dec 1988 |
| D & K Resources | Wyoming | 0 BBLs | 0 MCF | May 2014 - Jun 2021 |
| D & R Investments | Wyoming | 0 BBLs | 0 MCF | Sep 1992 - Jul 1995 |
| D & W Oil & Gas | Wyoming | 0 BBLs | 0 MCF | Mar 1980 - Mar 1996 |
| D K Cook Heirs LLC | Wyoming | 0 BBLs | 0 MCF | Aug 2009 - Dec 2011 |
| D M Consulting Inc | Wyoming | 0 BBLs | 0 MCF | Jul 1985 - Aug 1993 |
| D90 Energy LLC | Wyoming | 3,387 BBLs | 25,663 MCF | Jan 2020 - Jan 2024 |
| Dabros Properties Inc | Wyoming | 0 BBLs | 0 MCF | Sep 1987 - Sep 1990 |