1 | O S & J Operatin | | Oil Operator | Nov 1984 |
2 | O'Brien Energy Company | Shreveport, LA 71136 | Oil & Gas Operator | Sep 2019 |
3 | O'Brien Energy Resources Corp | Portsmouth, NH 03801 | Oil & Gas Operator | Dec 2024 |
4 | O'Brien Resources LLC | Shreveport, LA 71136 | Oil Operator | Nov 2017 |
5 | O'Connell, James P. | Vacaville, CA 95687 | Oil Operator | Nov 2009 |
6 | O'Hare Energy Co | | Oil Operator | Dec 1983 |
7 | Oak Ridge LLC | Wellsville, KS 66092 | Oil Operator | Dec 2019 |
8 | Oaks Petroleum I | | Oil Operator | Jul 1987 |
9 | Oakwood Resources, Inc. | Dallas, TX 75374 | Oil & Gas Operator | May 1998 |
10 | Oast, Thomas H. | Greenville, NC 27835 | Oil Operator | Nov 1985 |
11 | Occidental Energy Marketing, Inc. | Houston, TX 77227 | Gas Operator | Sep 2015 |
12 | Ocean Energy Resources Inc. | Houston, TX 77002 | Oil & Gas Operator | Jul 2024 |
13 | Ocfiw Oil Company, Inc. | Hartington, NE 68739 | Oil & Gas Operator | Dec 2009 |
14 | Ogh Oil Company | | Oil Operator | Sep 1995 |
15 | Ohio Kentucky Oil Corporation | Lexington, KY 40503 | Oil & Gas Operator | Dec 2020 |
16 | Oil & Gas Producers, Inc. | Topeka, KS 66604 | Oil Operator | Jun 2004 |
17 | Oil & Gas Servic | | Oil Operator | Jun 1983 |
18 | Oil Capital Corporation | Littleton, CO 80122 | Gas Operator | May 2009 |
19 | Oil Company Of America, Inc. | Hays, KS 67601 | Oil Operator | Dec 2009 |
20 | Oil Drillers & D | | Oil & Gas Operator | Feb 1992 |
21 | Oil Field Manage | | Oil Operator | Jun 1991 |
22 | Oil Gas Management, Inc. | Kansas City, MO 64106 | Oil Operator | Apr 2011 |
23 | Oil Internationa | | Oil Operator | Jun 1986 |
24 | Oil Lift, Incorporated | Metairie, LA 70002 | Oil & Gas Operator | Apr 2020 |
25 | Oil Partners | Salina, KS 67401 | Oil Operator | Jun 2001 |
26 | Oil Partners, LLC | Salina, KS 67401 | Oil Operator | Jul 2024 |
27 | Oil Producers In | | Oil & Gas Operator | Dec 1996 |
28 | Oil Producers, Inc. Of Kansas | Wichita, KS 67206 | Oil & Gas Operator | Dec 2024 |
29 | Oil Production S | | Oil Operator | Sep 1993 |
30 | Oil Prop Company | | Oil & Gas Operator | Sep 1995 |
31 | Oil Prop Investm | | Oil Operator | Dec 1995 |
32 | Oil Properties Co., Inc. | Wichita, KS 67208 | Gas Operator | Dec 2009 |
33 | Oil Property Man | | Oil & Gas Operator | Jun 1995 |
34 | Oil Property Management, Inc. | Attica, KS 67009 | Oil & Gas Operator | Feb 2021 |
35 | Oil Tech Producers Corporation | Moundridge, KS 67107 | Gas Operator | Jul 2024 |
36 | Oil-Tech Prod Co | | Oil & Gas Operator | Oct 1992 |
37 | Oilfield Search | | Oil Operator | Mar 1990 |
38 | Oilfield Services, LLC | Winfield, KS 67156 | Oil Operator | Nov 2017 |
39 | Oilfield Truck Service | | Oil Operator | Jun 2014 |
40 | Oilwell Operator | | Gas Operator | Dec 1994 |
41 | Oklahoma Energy & Exploration, Inc. | Tulsa, OK 74114 | Oil Operator | Jan 1996 |
42 | Oklahoma Rig & Salvage, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2015 |
43 | Okmar Oil Compan | | Oil & Gas Operator | Feb 1995 |
44 | Okmar Oil Company | Marietta, OH 45750 | Oil & Gas Operator | Jun 2005 |
45 | Okt Resources, LLC | Edmond, OK 73013 | Oil & Gas Operator | Dec 2024 |
46 | Ol' Oily LLC | | Oil Operator | Jul 2024 |
47 | Oleum Incorporat | | Gas Operator | Dec 1990 |
48 | Olson D Producti | | Oil Operator | Jul 1994 |
49 | Olson-Anderson Lease | | Oil Operator | Mar 2018 |
50 | Olympic Oil, Inc. | Hutchinson, KS 67502 | Oil & Gas Operator | May 2024 |
51 | Olympic Petroleu | | Oil & Gas Operator | Jul 1993 |
52 | Omega Enterprise | | Oil Operator | Sep 1990 |
53 | One Source Financial Services Inc. | McAllen, TX 78501 | Gas Operator | Dec 2019 |
54 | Oneok Bushton Proces | | Gas Operator | Mar 2007 |
55 | Oneok Energy Service | | Gas Operator | Dec 2008 |
56 | Oneok Exploratio | | Oil & Gas Operator | Mar 1995 |
57 | Oneok Field Services Company | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2022 |
58 | Oneok Gas Processing LLC | Tulsa, OK 74103 | Oil & Gas Operator | May 2018 |
59 | Oneok Resources Company | Tulsa, OK 74102 | Oil & Gas Operator | Feb 2017 |
60 | Onnen, Gerhard E. | Yates Center, KS 66783 | Oil Operator | Feb 2002 |
61 | Onshore, L.L.C. | Wichita, KS 67205 | Oil & Gas Operator | Dec 2009 |
62 | Onyxx Oil Corpor | | Oil Operator | Jul 1992 |
63 | Oolite Energy Corp | Amarillo, TX 79105 | Oil & Gas Operator | Apr 2022 |
64 | Opco LLC | Chase, KS 67524 | Oil Operator | Dec 2019 |
65 | Opdycke Lease Partners, A General Partnership | Russell, KS 67665 | Oil Operator | Jul 2024 |
66 | Opef Partnership, A General Partnership | Overland Park, KS 66221 | Oil Operator | Dec 2011 |
67 | Orca Operating Company LLC | Houston, TX 77056 | Oil & Gas Operator | Sep 2024 |
68 | Oryx Energy Comp | | Oil & Gas Operator | Apr 1991 |
69 | Oryx Energy Company | Dallas, TX 75221 | Oil & Gas Operator | May 2002 |
70 | Osage Energy LLC | Colony, KS 66015 | Oil Operator | Nov 2023 |
71 | Osage Resources, LLC | Wichita, KS 67202 | Oil & Gas Operator | Mar 2024 |
72 | Osborn Energy, L.L.C. | Bucyrus, KS 66013 | Oil & Gas Operator | Jul 2017 |
73 | Osborn Heirs Com | | Oil & Gas Operator | May 1995 |
74 | Osborn Heirs Company LTD | San Antonio, TX 78217 | Oil & Gas Operator | Jul 2024 |
75 | Osborn Oil & Gas | | Oil & Gas Operator | Jun 1991 |
76 | Osci Oil And Gas, Inc. | Parker, KS 66072 | Oil Operator | Jun 1998 |
77 | Oswego Oil & Gas | | Oil & Gas Operator | Jun 1984 |
78 | Outlaw Well Service LLC | Hays, KS 67601 | Oil Operator | Apr 2024 |
79 | Overland Exploration Company | | Oil Operator | May 2024 |
80 | Owen'S Pumping Service | | Oil Operator | Jul 2024 |
81 | Owen, Matthew | Hamilton, KS 66853 | Oil Operator | Sep 2016 |
82 | Owens Oil | | Oil Operator | Dec 2000 |
83 | Owens Oil Company | Iowa Park, TX 76367 | Oil & Gas Operator | Sep 2008 |
84 | Owens Oil Company, LLC | Yates Center, KS 66783 | Oil Operator | Jul 2024 |
85 | Owens Petroleum | | Oil Operator | May 2006 |
86 | Owens Petroleum LLC | Yates Center, KS 66783 | Oil & Gas Operator | Jul 2024 |
87 | Owi Operating Co. LC | Ottawa, KS 66067 | Oil & Gas Operator | Dec 2009 |
88 | Own Resources Operating LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Sep 2024 |
89 | Oxbow Oil Company,A Kansas General Partnership | Grenola, KS 67346 | Oil Operator | Apr 2015 |
90 | Oxford Explorati | | Oil & Gas Operator | Mar 1993 |
91 | Oxford Exploration | | Oil Operator | Apr 1988 |
92 | Oxy USA | | Oil Operator | Apr 1992 |
93 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Dec 2024 |
94 | Ozark Enterprise | | Oil Operator | Nov 1990 |