| Leona #142-287-31499 | U. S. Operating Inc. | Lee, TXNails Creek (Marlbrook) | PluggedOil | 10,000 | Jul 9, 2008 | — | — |
| Dee #142-287-30575 | U. S. Operating Inc. | Lee, TXGiddings (Navarro Oil) | PluggedOil | 10,000 | Apr 1, 2008 | — | — |
| Haley #142-287-30569 | U. S. Operating Inc. | Lee, TXSerbin (Taylor Sand) | PluggedOil | 10,000 | Dec 12, 2007 | — | — |
| Mabel #142-287-30821 | U. S. Operating Inc. | Lee, TXGiddings (Navarro Oil) | PluggedOil | 9,000 | Aug 30, 2007 | — | — |
| Dirk #142-287-31134 | U. S. Operating Inc. | Lee, TXGiddings (Navarro Oil) | PluggedOil | 9,100 | Jul 3, 2007 | — | — |
| Caron #1PG42-287-30411 | U. S. Operating Inc. | Lee, TXGiddings (Pecan Gap) | PluggedOil | 10,000 | Mar 9, 2006 | — | — |
| Clements Lynn #3HZ42-287-31788 | U. S. Operating Inc. | Lee, TXGiddings (Austin Chalk-3) | PluggedOil | 9,200 | Jul 29, 2005 | — | — |
| Gerdes-Best #1REHZ42-287-31469 | U. S. Operating Inc. | Lee, TXGiddings (Austin Chalk-3) | PluggedOil | 9,500 | May 19, 2005 | — | — |
| Rauch #1REHZ42-149-31941 | U. S. Operating Inc. | Fayette, TXGiddings (Austin Chalk-3) | PluggedOil | 12,863 | Feb 18, 2005 | — | — |
| Jennifer #1REHZ42-287-30658 | U. S. Operating Inc. | Lee, TXGiddings (Austin Chalk-3) | PluggedOil | 10,000 | Jul 12, 2004 | — | — |
| Bain #1REHZ42-149-30511 | U. S. Operating Inc. | Fayette, TXGiddings (Austin Chalk-3) | PluggedOil | 10,800 | Apr 30, 2004 | — | — |
| Hartman #142-123-31941 | U. S. Operating Inc. | De Witt, TXMission Valley ( 5 100) | PluggedGas | 5,800 | Jul 3, 2003 | — | — |
| Sheila #1REHZ42-287-30855 | U. S. Operating Inc. | Lee, TXGiddings (Austin Chalk-3) | PluggedOil | 10,000 | Feb 20, 2001 | — | — |
| Patterson a #1RE42-077-33645 | U. S. Operating Inc. | Clay, TXBellevue (Barnett Shale) | PluggedOil | 8,000 | Dec 21, 2000 | — | — |
| Tilli #1HZ42-287-30403 | U. S. Operating Inc. | Lee, TXGiddings (Austin Chalk-3) | PluggedOil | 10,000 | Aug 21, 1997 | — | — |
| Briscoe/Hulsman #182742-127-33100 | U. S. Operating Inc. | Dimmit, TXCatarina SW. (Olmos) | PluggedOil | 6,750 | Jan 29, 1997 | — | — |
| Sharon #1 HHZ42-287-30435 | U. S. Operating Inc. | Lee, TXGiddings (Austin Chalk-3) | PluggedOil | 10,000 | Dec 22, 1994 | — | — |
| Karen #142-127-32988 | U. S. Operating Inc. | Dimmit, TXThirteen W. (Olmos 3450) | PluggedOil | 4,000 | Mar 5, 1991 | — | — |
| Jennifer #242-287-32131 | U. S. Operating Inc. | Lee, TXGiddings (Austin Chalk-3) | PluggedOil | 9,700 | Dec 14, 1987 | — | — |
| Suzanne Unit #242-287-32142 | U. S. Operating Inc. | Lee, TXGiddings (Austin Chalk-3) | PluggedOil | 8,900 | Oct 15, 1987 | — | — |
| Davis Mollie C. #142-287-30084 | U. S. Operating Inc. | Lee, TXBig -a- Taylor | PluggedOil | 8,438 | Oct 14, 1987 | — | — |
| Carmean #142-287-30060 | U. S. Operating Inc. | Lee, TXBig -a- Taylor | PluggedOil | 8,443 | Aug 28, 1987 | — | — |
| Gates Ranch K #123642-127-32653 | U. S. Operating Inc. | Dimmit, TXCatarina SW. (Olmos) | PluggedGas | 7,200 | May 10, 1985 | — | — |
| Gates Ranch K-G #120742-127-32570 | U. S. Operating Inc. | Dimmit, TXCatarina SW. (Olmos) | PluggedGas | 7,000 | Oct 15, 1984 | — | — |
| Gates Ranch K-H #107442-127-32565 | U. S. Operating Inc. | Dimmit, TXCatarina SW. (San Miguel-Gas) | PluggedGas | 7,000 | Oct 4, 1984 | — | — |
| Gates Ranch K #122242-479-33946 | U. S. Operating Inc. | Webb, TXCatarina SW. (Olmos) | PluggedGas | 7,400 | Jul 25, 1984 | — | — |
| Schkade #242-287-31673 | U. S. Operating Inc. | Lee, TXGiddings (Austin Chalk-3) | PluggedOil | 9,400 | Jul 16, 1984 | — | — |
| Florence #242-287-31343 | U. S. Operating Inc. | Lee, TXGiddings (Austin Chalk-3) | PluggedOil | 9,000 | Mar 9, 1983 | — | — |
| Cora #142-287-30861 | U. S. Operating Inc. | Lee, TXGiddings (Pecan Gap) | PluggedGas | 10,000 | Jun 22, 1982 | — | — |
| Sherry #142-287-31254 | U. S. Operating Inc. | Lee, TXGiddings (Austin Chalk-3) | PluggedOil | 9,200 | Jun 11, 1982 | — | — |
| Whitney #142-287-31189 | U. S. Operating Inc. | Lee, TXGiddings (Austin Chalk-3) | PluggedOil | 9,300 | Feb 24, 1982 | — | — |
| Missy Unit #142-287-31150 | U. S. Operating Inc. | Lee, TXGiddings (Austin Chalk-3) | PluggedOil | 9,200 | Jan 22, 1982 | — | — |
| McFarland William #142-287-31139 | U. S. Operating Inc. | Lee, TXGiddings (Austin Chalk-3) | PluggedOil | 9,500 | Dec 31, 1981 | — | — |
| Alfreda Unit #142-287-31053 | U. S. Operating Inc. | Lee, TXGiddings (Austin Chalk-3) | PluggedOil | 9,000 | Sep 23, 1981 | — | — |
| Ginger Unit #142-287-31047 | U. S. Operating Inc. | Lee, TXGiddings (Austin Chalk-3) | PluggedOil | 9,000 | Sep 15, 1981 | — | — |
| Sarilynn Unit #142-287-30816 | U. S. Operating Inc. | Lee, TXGiddings (Austin Chalk-3) | PluggedOil | 9,500 | Nov 10, 1980 | — | — |
| Roy #142-287-30728 | U. S. Operating Inc. | Lee, TXGiddings (Austin Chalk Gas) | PluggedGas | 9,300 | Jun 23, 1980 | — | — |
| Becky Unit #142-287-30713 | U. S. Operating Inc. | Lee, TXGiddings (Austin Chalk-3) | PluggedOil | 9,500 | Jun 6, 1980 | — | — |
| Cowboy Unit #142-477-30361 | U. S. Operating Inc. | Washington, TXGiddings (Austin Chalk Gas) | PluggedGas | 11,500 | Mar 20, 1980 | — | — |
| Debbie #142-287-30525 | U. S. Operating Inc. | Lee, TXGiddings (Austin Chalk Gas) | PluggedGas | 10,000 | Jul 18, 1979 | — | — |
| Spacek #142-287-30418 | U. S. Operating Inc. | Lee, TXGiddings (Austin Chalk-3) | PluggedOil | 10,000 | Oct 27, 1978 | — | — |
| Kaye #142-287-30402 | U. S. Operating Inc. | Lee, TXGiddings (Austin Chalk-3) | PluggedOil | 10,000 | Sep 26, 1978 | — | — |
| Clements Lynn #142-287-30342 | U. S. Operating Inc. | Lee, TXGiddings (Austin Chalk-3) | PluggedOil | 9,500 | May 12, 1978 | — | — |