| 651414 | Dec 20, 2007 | Dec 20, 2007 | Chesapeake Operating, Inc. | Torres #3HH | 9,000 | 25132466 |
| 651448 | Dec 19, 2007 | Dec 19, 2007 | Chesapeake Operating, Inc. | Evans #2HH | 9,000 | 25132470 |
| 651426 | Dec 19, 2007 | Dec 19, 2007 | EOG Resources, Inc. | Fleet Unit #5HH | 10,000 | 25132469 |
| 651423 | Dec 19, 2007 | Dec 19, 2007 | EOG Resources, Inc. | Stevenson D Unit #1HH | 10,000 | 25132468 |
| 651423Amendment | Dec 19, 2007 | Dec 19, 2007 | EOG Resources, Inc. | Stevenson D Unit #1HH | 10,000 | 25132468 |
| 651423Amendment | Dec 19, 2007 | Dec 19, 2007 | EOG Resources, Inc. | Stevenson D Unit #1HH | 10,000 | 25132468 |
| 651412 | Dec 19, 2007 | Dec 19, 2007 | Devon Energy Production Co, L.P. | Charles Thomas #1HH | 9,000 | 25132464 |
| 651412Amendment | Dec 19, 2007 | Dec 19, 2007 | Devon Energy Production Co, L.P. | Thomas, Charles #1HH | 9,000 | 25132464 |
| 651369 | Dec 19, 2007 | Dec 19, 2007 | EOG Resources, Inc. | Tolbert Unit #10HH | 10,000 | 25132461 |
| 651368 | Dec 19, 2007 | Dec 19, 2007 | EOG Resources, Inc. | Tolbert Unit #9HH | 10,000 | 25132460 |
| 651363 | Dec 19, 2007 | Dec 19, 2007 | EOG Resources, Inc. | Tolbert Unit #8HH | 10,000 | 25132458 |
| 651361 | Dec 19, 2007 | Dec 19, 2007 | EOG Resources, Inc. | Tolbert Unit #7HH | 10,000 | 25132459 |
| 651310 | Dec 19, 2007 | Dec 19, 2007 | EOG Resources, Inc. | Scott Unit #2HH | 10,000 | 25132453 |
| 651305 | Dec 19, 2007 | Dec 19, 2007 | EOG Resources, Inc. | Scott Unit #1HH | 10,000 | 25132451 |
| 651355 | Dec 18, 2007 | Dec 18, 2007 | EOG Resources, Inc. | Tolbert Unit #5HH | 10,000 | 25132456 |
| 651309 | Dec 18, 2007 | Dec 18, 2007 | Devon Energy Production Co, L.P. | Vodine Kenny #1HH | 9,000 | 25132452 |
| 651105 | Dec 18, 2007 | Dec 18, 2007 | Chesapeake Operating, Inc. | Hawley B Unit #3HH | 9,000 | 25132443 |
| 651102 | Dec 18, 2007 | Dec 18, 2007 | Chesapeake Operating, Inc. | Hawley B Unit #1HH | 9,000 | 25132439 |
| 651245 | Dec 17, 2007 | Dec 17, 2007 | Pinnergy, Ltd. | Highway 171 SWD #1 | 11,000 | 25132448 |
| 651237 | Dec 17, 2007 | Dec 17, 2007 | Pinnergy, Ltd. | Highway 67 SWD #1 | 12,300 | 25132450 |
| 651225 | Dec 17, 2007 | Dec 17, 2007 | EOG Resources, Inc. | Vella Hill Unit #6HH | 10,000 | 25132449 |
| 651223 | Dec 17, 2007 | Dec 17, 2007 | EOG Resources, Inc. | Vella Hill Unit #5HH | 10,000 | 25132447 |
| 651135 | Dec 17, 2007 | Dec 17, 2007 | EOG Resources, Inc. | Walking T Ranch Unit #15HH | 10,000 | 25132442 |
| 651131 | Dec 17, 2007 | Dec 17, 2007 | EOG Resources, Inc. | Walking T Ranch Unit #14HH | 10,000 | 25132446 |
| 651129 | Dec 17, 2007 | Dec 17, 2007 | EOG Resources, Inc. | Walking T Ranch Unit #13HH | 10,000 | 25132445 |
| 651128 | Dec 17, 2007 | Dec 17, 2007 | EOG Resources, Inc. | Walking T Ranch Unit #12HH | 10,000 | 25132444 |
| 651126 | Dec 17, 2007 | Dec 17, 2007 | EOG Resources, Inc. | Walking T Ranch Unit #11HH | 10,000 | 25132440 |
| 651104 | Dec 17, 2007 | Dec 17, 2007 | EOG Resources, Inc. | Pallmeyer Unit #15 | 10,000 | 25132441 |
| 651100 | Dec 17, 2007 | Dec 17, 2007 | EOG Resources, Inc. | Pallmeyer Unit #14 HH | 10,000 | 25132437 |
| 651097 | Dec 17, 2007 | Dec 17, 2007 | EOG Resources, Inc. | Pallmeyer Unit #13 | 10,000 | 25132438 |
| 651095 | Dec 17, 2007 | Dec 17, 2007 | EOG Resources, Inc. | Pallmeyer Unit #8HH | 10,000 | 25132436 |
| 651082 | Dec 17, 2007 | Dec 17, 2007 | Chesapeake Operating, Inc. | Stults-Welborn #5HH | 9,000 | 25132435 |
| 651082Amendment | Dec 17, 2007 | Dec 17, 2007 | Chesapeake Operating, Inc. | Stults-Welborn #5HH | 9,000 | 25132435 |
| 651081 | Dec 17, 2007 | Dec 17, 2007 | Chesapeake Operating, Inc. | Stults-Welborn #4HH | 9,000 | 25132434 |
| 651081Amendment | Dec 17, 2007 | Dec 17, 2007 | Chesapeake Operating, Inc. | Stults-Welborn #4HH | 9,000 | 25132434 |
| 651033 | Dec 15, 2007 | Dec 15, 2007 | Chesapeake Operating, Inc. | Stolee #2HH | 9,000 | 25132433 |
| 650919 | Dec 13, 2007 | Dec 13, 2007 | Chesapeake Operating, Inc. | Ramey, David #1HH | 9,000 | 25132432 |
| 650876 | Dec 13, 2007 | Dec 13, 2007 | XTO Energy Inc. | Harper Nej East #C 3AHH | 12,000 | 25132431 |
| 650876Amendment | Dec 13, 2007 | Dec 13, 2007 | XTO Energy Inc. | Harper Nej East #C 3AHH | 12,000 | 25132431 |
| 649799 | Dec 13, 2007 | Dec 13, 2007 | Chesapeake Operating, Inc. | Little Hoss #B 8HH | 9,000 | 25132373 |
| 649798 | Dec 13, 2007 | Dec 13, 2007 | Chesapeake Operating, Inc. | Little Hoss #B 6HH | 9,000 | 25132372 |
| 650828 | Dec 12, 2007 | Dec 12, 2007 | EOG Resources, Inc. | Pallmeyer Unit #7HH | 10,000 | 25132430 |
| 650823 | Dec 12, 2007 | Dec 12, 2007 | EOG Resources, Inc. | Pallmeyer Unit #6HH | 10,000 | 25132429 |
| 650823Amendment | Dec 12, 2007 | Dec 12, 2007 | EOG Resources, Inc. | Pallmeyer Unit #6HH | 10,000 | 25132429 |
| 650819 | Dec 12, 2007 | Dec 12, 2007 | EOG Resources, Inc. | Pallmeyer Unit #5HH | 10,000 | 25132428 |
| 650812 | Dec 12, 2007 | Dec 12, 2007 | EOG Resources, Inc. | Wolfe Unit #2HH | 10,000 | 25132427 |
| 650812Amendment | Dec 12, 2007 | Dec 12, 2007 | EOG Resources, Inc. | Wolfe Unit #2HH | 10,000 | 25132427 |
| 650812Amendment | Dec 12, 2007 | Dec 12, 2007 | EOG Resources, Inc. | Wolfe Unit #2HH | 10,000 | 25132427 |
| 650808 | Dec 12, 2007 | Dec 12, 2007 | EOG Resources, Inc. | Pallmeyer Unit #4HH | 10,000 | 25132426 |
| 650806 | Dec 12, 2007 | Dec 12, 2007 | EOG Resources, Inc. | Pallmeyer Unit #3HH | 10,000 | 25132425 |
| 650804 | Dec 12, 2007 | Dec 12, 2007 | EOG Resources, Inc. | Pallmeyer Unit #2HH | 10,000 | 25132424 |
| 650803 | Dec 12, 2007 | Dec 12, 2007 | EOG Resources, Inc. | Pallmeyer Unit #1HH | 10,000 | 25132423 |
| 650773 | Dec 12, 2007 | Dec 12, 2007 | EOG Resources, Inc. | Clements Unit #8HH | 10,000 | 25132421 |
| 650690 | Dec 12, 2007 | Dec 12, 2007 | EOG Resources, Inc. | John F Clements #1HH | 10,000 | 25132416 |
| 650781 | Dec 11, 2007 | Dec 11, 2007 | EOG Resources, Inc. | Clements Unit #9HH | 10,000 | 25132422 |
| 650708 | Dec 11, 2007 | Dec 11, 2007 | XTO Energy Inc. | Rose Hill Unit #2HH | 11,000 | 25132420 |
| 650705 | Dec 11, 2007 | Dec 11, 2007 | Devon Energy Production Co, L.P. | West, Ronald Lynn "A" #3HH | 9,000 | 25132419 |
| 650695 | Dec 11, 2007 | Dec 11, 2007 | EOG Resources, Inc. | John F Clements #3HH | 10,000 | 25132418 |
| 650691 | Dec 11, 2007 | Dec 11, 2007 | EOG Resources, Inc. | Clements, John F. #2HH | 10,000 | 25132417 |
| 650691Amendment | Dec 11, 2007 | Dec 11, 2007 | EOG Resources, Inc. | Clements, John F. #2HH | 10,000 | 25132417 |
| 650627 | Dec 10, 2007 | Dec 10, 2007 | EOG Resources, Inc. | Walking T Ranch Unit #6HH | 10,000 | 25133195 |
| 650537 | Dec 10, 2007 | Dec 10, 2007 | Chesapeake Operating, Inc. | Cedf #7HH | 9,000 | 25132415 |
| 650535 | Dec 10, 2007 | Dec 10, 2007 | Chesapeake Operating, Inc. | Cedf #3HH | 9,000 | 25132411 |
| 650534 | Dec 10, 2007 | Dec 10, 2007 | Chesapeake Operating, Inc. | Cates #5HH | 9,000 | 25132410 |
| 650490 | Dec 10, 2007 | Dec 10, 2007 | Chesapeake Operating, Inc. | Fritts #5HH | 9,000 | 25132408 |
| 650488 | Dec 10, 2007 | Dec 10, 2007 | Chesapeake Operating, Inc. | Fritts #4HH | 9,000 | 25132406 |
| 650487 | Dec 10, 2007 | Dec 10, 2007 | Chesapeake Operating, Inc. | Fritts #3HH | 9,000 | 25132407 |
| 650486 | Dec 10, 2007 | Dec 10, 2007 | Chesapeake Operating, Inc. | Fritts #2HH | 9,000 | 25132405 |
| 650422 | Dec 10, 2007 | Dec 10, 2007 | Chesapeake Operating, Inc. | Wakeman #1HH | 9,000 | 25132401 |
| 650422Amendment | Dec 10, 2007 | Dec 10, 2007 | Chesapeake Operating, Inc. | Wakeman #1HH | 9,000 | 25132401 |
| 650420 | Dec 10, 2007 | Dec 10, 2007 | Chesapeake Operating, Inc. | Hawley B Unit #2HH | 9,000 | 25132403 |
| 650387 | Dec 10, 2007 | Dec 10, 2007 | Chesapeake Operating, Inc. | Rich #8HH | 9,000 | 25132399 |
| 650556 | Dec 8, 2007 | Dec 8, 2007 | Range Production Company | Ingle-Moore Unit #2HH | 9,000 | 25132413 |
| 650556Amendment | Dec 8, 2007 | Dec 8, 2007 | Range Production Company | Ingle-Moore Unit #2HH | 9,000 | 25132413 |
| 650555 | Dec 8, 2007 | Dec 8, 2007 | Range Production Company | Ingle-Moore Unit #1HH | 9,000 | 25132414 |
| 650547 | Dec 8, 2007 | Dec 8, 2007 | XTO Energy Inc. | Shaded Lane Unit #1HH | 12,000 | 25132412 |
| 650547Amendment | Dec 8, 2007 | Dec 8, 2007 | XTO Energy Inc. | Shaded Lane Unit #1HH | 12,000 | 25132412 |
| 650461 | Dec 7, 2007 | Dec 7, 2007 | XTO Energy Inc. | Graham Unit #1HH | 11,000 | 25132404 |
| 650461Amendment | Dec 7, 2007 | Dec 7, 2007 | XTO Energy Inc. | Graham Unit #1HH | 11,000 | 25132404 |
| 650400 | Dec 7, 2007 | Dec 7, 2007 | Metro Saltwater Disposal, Inc. | Kimbrough SWD #1 | 13,000 | 25132402 |
| 650400Amendment | Dec 7, 2007 | Dec 7, 2007 | Metro Saltwater Disposal, Inc. | Metro SWD #1 | 13,000 | 25132402 |
| 650395 | Dec 7, 2007 | Dec 7, 2007 | XTO Energy Inc. | Rose Hill Unit #1HH | 11,000 | 25132400 |
| 650395Amendment | Dec 7, 2007 | Dec 7, 2007 | XTO Energy Inc. | Rose Hill Unit #1HH | 11,000 | 25132400 |
| 650395Amendment | Dec 7, 2007 | Dec 7, 2007 | XTO Energy Inc. | Rose Hill Unit #1HH | 11,000 | 25132400 |
| 650384 | Dec 7, 2007 | Dec 7, 2007 | Chesapeake Operating, Inc. | Rich #5HH | 9,000 | 25132398 |
| 650382 | Dec 7, 2007 | Dec 7, 2007 | Chesapeake Operating, Inc. | Rich #4HH | 9,000 | 25132397 |
| 650362 | Dec 6, 2007 | Dec 6, 2007 | EOG Resources, Inc. | Stewart Unit #9HH | 10,000 | 25132396 |
| 650361 | Dec 6, 2007 | Dec 6, 2007 | EOG Resources, Inc. | Stewart Unit #8HH | 10,000 | 25132395 |
| 650358 | Dec 6, 2007 | Dec 6, 2007 | EOG Resources, Inc. | Stewart Unit #7HH | 10,000 | 25132394 |
| 650356 | Dec 6, 2007 | Dec 6, 2007 | EOG Resources, Inc. | Stewart Unit #6HH | 10,000 | 25132393 |
| 650250 | Dec 4, 2007 | Dec 4, 2007 | XTO Energy Inc. | River Bend #1HH | 12,000 | 25132392 |
| 650250Amendment | Dec 4, 2007 | Dec 4, 2007 | XTO Energy Inc. | River Bend #1HH | 12,000 | 25132392 |
| 650250Amendment | Dec 4, 2007 | Dec 4, 2007 | XTO Energy Inc. | River Bend #1HH | 12,000 | 25132392 |
| 650174 | Dec 4, 2007 | Dec 4, 2007 | Chesapeake Operating, Inc. | Stolee #1HH | 9,000 | 25132391 |
| 650174Amendment | Dec 4, 2007 | Dec 4, 2007 | Chesapeake Operating, Inc. | Stolee #1HH | 9,000 | 25132391 |
| 650000 | Dec 3, 2007 | Dec 3, 2007 | Chesapeake Operating, Inc. | Brown #1HH | 9,000 | 25132383 |
| 649984 | Dec 3, 2007 | Dec 3, 2007 | Chesapeake Operating, Inc. | Little Hoss #W 5HH | 9,000 | 25132381 |
| 650108 | Nov 30, 2007 | Nov 30, 2007 | Chesapeake Operating, Inc. | Little Hoss 7 #B 4HH | 9,000 | 25132388 |
| 650107 | Nov 30, 2007 | Nov 30, 2007 | Chesapeake Operating, Inc. | Little Hoss 7 #B 2HH | 9,000 | 25132387 |
| 650091 | Nov 30, 2007 | Nov 30, 2007 | Chesapeake Operating, Inc. | Gainer #5HH | 9,000 | 25132390 |