| 642099 | Jul 17, 2007 | Jul 17, 2007 | Arrington,david H. Oil & Gas,inc | Black Gnat #1HH | 8,700 | 25132022 |
| 642089 | Jul 17, 2007 | Jul 17, 2007 | Chesapeake Operating, Inc. | Shaw #2HH | 9,000 | 25132019 |
| 642086 | Jul 17, 2007 | Jul 17, 2007 | Chesapeake Operating, Inc. | Shaw B #3HH | 9,000 | 25132018 |
| 642086Amendment | Jul 17, 2007 | Jul 17, 2007 | Chesapeake Operating, Inc. | Shaw B #3HH | 9,000 | 25132018 |
| 642009 | Jul 17, 2007 | Jul 17, 2007 | Chesapeake Operating, Inc. | Young #4HH | 9,000 | 25132015 |
| 642007 | Jul 17, 2007 | Jul 17, 2007 | Chesapeake Operating, Inc. | Young #3HH | 9,000 | 25132014 |
| 641999 | Jul 17, 2007 | Jul 17, 2007 | Devon Energy Production Co, L.P. | Circle R Partnership #12HH | 9,000 | 25132007 |
| 641989 | Jul 17, 2007 | Jul 17, 2007 | Devon Energy Production Co, L.P. | Circle R Partnership #17HH | 9,000 | 25132004 |
| 641979 | Jul 17, 2007 | Jul 17, 2007 | Devon Energy Production Co, L.P. | Circle R Partnership #16HH | 9,000 | 25132005 |
| 641945 | Jul 17, 2007 | Jul 17, 2007 | Devon Energy Production Co, L.P. | Kennon, Alfred #5HH | 9,000 | 25132001 |
| 641933 | Jul 17, 2007 | Jul 17, 2007 | Devon Energy Production Co, L.P. | Kennon, Alfred #3HH | 9,000 | 25131997 |
| 640910 | Jul 17, 2007 | Jul 17, 2007 | Chesapeake Operating, Inc. | Brown, E. #6HH | 9,000 | 25131930 |
| 642075 | Jul 16, 2007 | Jul 16, 2007 | Burlington Resources O & G Co LP | Georges Creek Ranch #23HH | 9,000 | 25132017 |
| 642052 | Jul 16, 2007 | Jul 16, 2007 | Devon Energy Production Co, L.P. | Juraschek, Gayle #1H | 9,000 | 25132016 |
| 642015 | Jul 16, 2007 | Jul 16, 2007 | EOG Resources, Inc. | Ford Unit #1HH | 7,800 | 25132012 |
| 642015Amendment | Jul 16, 2007 | Jul 16, 2007 | EOG Resources, Inc. | Ford Unit #1HH | 7,800 | 25132012 |
| 642002 | Jul 16, 2007 | Jul 16, 2007 | EOG Resources, Inc. | Martin Unit #4HH | 8,300 | 25132009 |
| 642001 | Jul 16, 2007 | Jul 16, 2007 | EOG Resources, Inc. | Martin Unit #3HH | 8,400 | 25132008 |
| 641992 | Jul 16, 2007 | Jul 16, 2007 | Adexco Operating Company | Cresson Estates Unit #1HH | 8,500 | 25132006 |
| 641992Amendment | Jul 16, 2007 | Jul 16, 2007 | Range Production Company | Cresson Estates Unit #1HH | 8,500 | 25132006 |
| 641977 | Jul 16, 2007 | Jul 16, 2007 | Devon Energy Production Co, L.P. | Pitts, Charles #4HH | 9,000 | 25132003 |
| 641972 | Jul 16, 2007 | Jul 16, 2007 | Devon Energy Production Co, L.P. | LBR Family Partnership #12HH | 9,000 | 25132002 |
| 641937 | Jul 16, 2007 | Jul 16, 2007 | Devon Energy Production Co, L.P. | Charles Pitts #3HH | 9,000 | 25131996 |
| 641930 | Jul 16, 2007 | Jul 16, 2007 | Devon Energy Production Co, L.P. | West Dairies #3HH | 9,000 | 25131995 |
| 641924 | Jul 16, 2007 | Jul 16, 2007 | Chesapeake Operating, Inc. | Shaw #3HH | 9,000 | 25131994 |
| 641716 | Jul 16, 2007 | Jul 16, 2007 | Chesapeake Operating, Inc. | Doty #3HH | 9,000 | 25132023 |
| 641715 | Jul 16, 2007 | Jul 16, 2007 | Chesapeake Operating, Inc. | Doty #2HH | 9,000 | 25131989 |
| 641714 | Jul 16, 2007 | Jul 16, 2007 | Chesapeake Operating, Inc. | Doty #1HH | 9,000 | 25131988 |
| 641948 | Jul 14, 2007 | Jul 14, 2007 | Devon Energy Production Co, L.P. | LBR Family Partnership #11HH | 9,000 | 25132000 |
| 641920 | Jul 14, 2007 | Jul 14, 2007 | XTO Energy Inc. | Forston Burton Kirkland Unit #A 4HH | 12,000 | 25132011 |
| 641920Amendment | Jul 14, 2007 | Jul 14, 2007 | XTO Energy Inc. | Forston Burton Kirkland Unit #A 4HH | 12,000 | 25132011 |
| 641918 | Jul 14, 2007 | Jul 14, 2007 | XTO Energy Inc. | Forston Burton Kirkland Unit #A 3HH | 12,000 | 25132010 |
| 641878 | Jul 14, 2007 | Jul 14, 2007 | Devon Energy Production Co, L.P. | Circle R Partnership #15HH | 9,000 | 25131993 |
| 641844 | Jul 14, 2007 | Jul 14, 2007 | EOG Resources, Inc. | Martin Unit #1HH | 8,300 | 25131991 |
| 641844Amendment | Jul 14, 2007 | Jul 14, 2007 | EOG Resources, Inc. | Martin Unit #1HH | 10,000 | 25131991 |
| 641686 | Jul 13, 2007 | Jul 13, 2007 | EOG Resources, Inc. | Fleet Unit #4HH | 8,500 | 25131987 |
| 641686Amendment | Jul 13, 2007 | Jul 13, 2007 | EOG Resources, Inc. | Fleet Unit #4HH | 10,000 | 25131987 |
| 641674 | Jul 13, 2007 | Jul 13, 2007 | EOG Resources, Inc. | Fleet Unit #3HH | 8,700 | 25131985 |
| 641674Amendment | Jul 13, 2007 | Jul 13, 2007 | EOG Resources, Inc. | Fleet Unit #3HH | 8,700 | 25131985 |
| 640981 | Jul 13, 2007 | Jul 13, 2007 | EOG Resources, Inc. | Hall Unit #4HH | 7,800 | 25132013 |
| 640976 | Jul 13, 2007 | Jul 13, 2007 | EOG Resources, Inc. | Hall Unit #2HH | 7,800 | 25131934 |
| 624643Amendment | Jul 13, 2007 | Jul 13, 2007 | XTO Energy Inc. | Fortson Burton Kirkland Unit #B 1HH | 12,000 | 25131143 |
| 641672 | Jul 12, 2007 | Jul 12, 2007 | EOG Resources, Inc. | Fleet Unit #2HH | 8,500 | 25131986 |
| 641672Amendment | Jul 12, 2007 | Jul 12, 2007 | EOG Resources, Inc. | Fleet Unit #2HH | 10,000 | 25131986 |
| 641634 | Jul 11, 2007 | Jul 11, 2007 | Range Production Company | Robinson-Moniz Unit #3HH | 9,000 | 25131984 |
| 641633 | Jul 11, 2007 | Jul 11, 2007 | Range Production Company | Robinson-Moniz Unit #2HH | 9,000 | 25131983 |
| 641614 | Jul 11, 2007 | Jul 11, 2007 | Paloma Resources, LLC | Abilene Christian University UT #1HH | 8,500 | 25131982 |
| 641607 | Jul 11, 2007 | Jul 11, 2007 | Devon Energy Production Co, L.P. | Boyd, Billy #8H | 9,000 | 25131981 |
| 641607Amendment | Jul 11, 2007 | Jul 11, 2007 | Devon Energy Production Co, L.P. | Boyd, Billy #8H | 9,000 | 25131981 |
| 641602 | Jul 11, 2007 | Jul 11, 2007 | Chesapeake Operating, Inc. | Slmr #1HH | 9,000 | 25131979 |
| 641592 | Jul 11, 2007 | Jul 11, 2007 | Devon Energy Production Co, L.P. | Thomas, Joseph #2HH | 9,000 | 25131978 |
| 641592Amendment | Jul 11, 2007 | Jul 11, 2007 | Devon Energy Production Co, L.P. | Thomas, Joseph #2HH | 9,000 | 25131978 |
| 641592Amendment | Jul 11, 2007 | Jul 11, 2007 | Devon Energy Production Co, L.P. | Thomas, Joseph #2HH | 9,000 | 25131978 |
| 641592Amendment | Jul 11, 2007 | Jul 11, 2007 | Devon Energy Production Co, L.P. | Thomas, Joseph #2HH | 9,000 | 25131978 |
| 641579 | Jul 11, 2007 | Jul 11, 2007 | Devon Energy Production Co, L.P. | Ross #2H | 9,000 | 25131977 |
| 641604 | Jul 10, 2007 | Jul 10, 2007 | Devon Energy Production Co, L.P. | Billy Boyd #7H | 9,000 | 25131980 |
| 641560 | Jul 10, 2007 | Jul 10, 2007 | Devon Energy Production Co, L.P. | Bluebird #2HH | 9,000 | 25131976 |
| 641530 | Jul 10, 2007 | Jul 10, 2007 | EOG Resources, Inc. | Lake Alvarado Unit #2HH | 8,300 | 25131975 |
| 641529 | Jul 10, 2007 | Jul 10, 2007 | EOG Resources, Inc. | Lake Alvarado Unit #1HH | 8,500 | 25131974 |
| 641528 | Jul 10, 2007 | Jul 10, 2007 | Devon Energy Production Co, L.P. | Circle R Partnership #14HH | 9,000 | 25131973 |
| 641528Amendment | Jul 10, 2007 | Jul 10, 2007 | Devon Energy Production Co, L.P. | Circle R Partnership #14HH | 9,000 | 25131973 |
| 641396 | Jul 10, 2007 | Jul 10, 2007 | Range Production Company | Boswell #1HH | 9,000 | 25131960 |
| 641519 | Jul 9, 2007 | Jul 9, 2007 | Quicksilver Resources Inc. | Smithers, Waylon #4HH | 6,400 | 25131972 |
| 641503 | Jul 9, 2007 | Jul 9, 2007 | EOG Resources, Inc. | Andrus/Shellenberger Unit #3HH | 7,800 | 25131971 |
| 641500 | Jul 9, 2007 | Jul 9, 2007 | EOG Resources, Inc. | Andrus/Shellenberger Unit #2HH | 7,800 | 25131970 |
| 641478 | Jul 9, 2007 | Jul 9, 2007 | EOG Resources, Inc. | Teich, Henry #6HH | 7,800 | 25131968 |
| 641477 | Jul 9, 2007 | Jul 9, 2007 | EOG Resources, Inc. | Teich, Henry #5HH | 7,800 | 25131969 |
| 641461 | Jul 9, 2007 | Jul 9, 2007 | Devon Energy Production Co, L.P. | Frazier, Ricky #5HH | 9,000 | 25131967 |
| 641449 | Jul 9, 2007 | Jul 9, 2007 | Quicksilver Resources Inc. | Smithers, Waylon #3HH | 6,400 | 25131965 |
| 641447 | Jul 9, 2007 | Jul 9, 2007 | Quicksilver Resources Inc. | Smithers, Waylon #2HH | 6,400 | 25131964 |
| 641446 | Jul 9, 2007 | Jul 9, 2007 | Quicksilver Resources Inc. | Smithers, Waylon #1HH | 6,400 | 25131963 |
| 641397 | Jul 6, 2007 | Jul 6, 2007 | Range Production Company | Boswell #2HH | 9,000 | 25131961 |
| 641397Amendment | Jul 6, 2007 | Jul 6, 2007 | Range Production Company | Boswell #2HH | 9,000 | 25131961 |
| 641350 | Jul 6, 2007 | Jul 6, 2007 | Devon Energy Production Co, L.P. | LBR Family Partnership #10HH | 9,000 | 25131959 |
| 641322 | Jul 6, 2007 | Jul 6, 2007 | Sullivan, Hollis R. Inc. | Parker #1HH | 8,900 | 25131958 |
| 641455 | Jul 5, 2007 | Jul 5, 2007 | Devon Energy Production Co, L.P. | Ricky Frazier #7HH | 9,000 | 25131966 |
| 641253 | Jul 5, 2007 | Jul 5, 2007 | Devon Energy Production Co, L.P. | Bill West #2H | 9,000 | 25131956 |
| 641247 | Jul 5, 2007 | Jul 5, 2007 | Devon Energy Production Co, L.P. | Pauline Harrison #3H | 9,000 | 25131955 |
| 641202 | Jul 3, 2007 | Jul 3, 2007 | Devon Energy Production Co, L.P. | Frazier, Ricky #2HH | 9,000 | 25131962 |
| 641189 | Jul 3, 2007 | Jul 3, 2007 | Devon Energy Production Co, L.P. | Charles Pitts #7HH | 9,000 | 25131953 |
| 641146 | Jul 3, 2007 | Jul 3, 2007 | EOG Resources, Inc. | Maples Unit #8HH | 8,500 | 25131952 |
| 641146Amendment | Jul 3, 2007 | Jul 3, 2007 | EOG Resources, Inc. | Maples Unit #8HH | 8,500 | 25131952 |
| 641142 | Jul 3, 2007 | Jul 3, 2007 | EOG Resources, Inc. | Maples Unit #7HH | 8,350 | 25131951 |
| 641142Amendment | Jul 3, 2007 | Jul 3, 2007 | EOG Resources, Inc. | Maples Unit #7HH | 8,300 | 25131951 |
| 641120 | Jul 3, 2007 | Jul 3, 2007 | EOG Resources, Inc. | Maples Unit #6HH | 8,500 | 25131948 |
| 641120Amendment | Jul 3, 2007 | Jul 3, 2007 | EOG Resources, Inc. | Maples Unit #6HH | 8,500 | 25131948 |
| 641105 | Jul 3, 2007 | Jul 3, 2007 | Devon Energy Production Co, L.P. | Moertle, Lawrence #1H | 9,000 | 25131945 |
| 641515 | Jul 2, 2007 | Jul 2, 2007 | Devon Energy Production Co, L.P. | Frazier, Ricky #4HH | 9,000 | 25131957 |
| 641515Amendment | Jul 2, 2007 | Jul 2, 2007 | Devon Energy Production Co, L.P. | Frazier, Ricky #4HH | 9,000 | 25131957 |
| 641119 | Jul 2, 2007 | Jul 2, 2007 | Chesapeake Operating, Inc. | Little Hoss 7 #C 4HH | 9,000 | 25131950 |
| 641119Amendment | Jul 2, 2007 | Jul 2, 2007 | Chesapeake Operating, Inc. | Little Hoss 7 #C 4HH | 9,000 | 25131950 |
| 641116 | Jul 2, 2007 | Jul 2, 2007 | Chesapeake Operating, Inc. | Little Hoss 7 #C 3HH | 9,000 | 25131947 |
| 641115 | Jul 2, 2007 | Jul 2, 2007 | Chesapeake Operating, Inc. | Little Hoss 7 #C 2HH | 9,000 | 25131946 |
| 641114 | Jul 2, 2007 | Jul 2, 2007 | Chesapeake Operating, Inc. | Little Hoss 7 #C 1HH | 9,000 | 25131949 |
| 641077 | Jul 2, 2007 | Jul 2, 2007 | Chesapeake Operating, Inc. | Shaw B #2HH | 9,000 | 25131942 |
| 641076 | Jul 2, 2007 | Jul 2, 2007 | EOG Resources, Inc. | Maples Unit #5HH | 8,300 | 25131943 |
| 641076Amendment | Jul 2, 2007 | Jul 2, 2007 | EOG Resources, Inc. | Maples Unit #5HH | 10,000 | 25131943 |
| 641075 | Jul 2, 2007 | Jul 2, 2007 | XTO Energy Inc. | Cleburne State Park #2HH | 12,000 | 25131940 |
| 641075Amendment | Jul 2, 2007 | Jul 2, 2007 | XTO Energy Inc. | Cleburne State Park #2HH | 12,000 | 25131940 |
| 641073 | Jul 2, 2007 | Jul 2, 2007 | EOG Resources, Inc. | Maples Unit #4HH | 8,300 | 25131941 |