| 529631 | Mar 14, 2003 | Mar 14, 2003 | Devon Energy Production Co, L.P. | Wellman West Unit #27HH | 5,650 | 44531901 |
| 529236 | Mar 6, 2003 | Mar 6, 2003 | Devon Energy Production Co, L.P. | Wellman West Unit #31HH | 5,700 | 44531863 |
| 528168 | Mar 5, 2003 | Mar 5, 2003 | Chevron U. S. A. Inc. | Mallet Land & Cattle Co. #117HH | 9,000 | 44531930 |
| 528154 | Mar 4, 2003 | Mar 4, 2003 | Chevron U. S. A. Inc. | Mallet Land & Cattle Co. #111HH | 9,000 | 44531885 |
| 528558 | Feb 27, 2003 | Feb 27, 2003 | XTO Energy Inc. | Prentice Northeast Unit #501 | 7,395 | 44532009 |
| 528716 | Feb 21, 2003 | Feb 21, 2003 | Landreth, Robert E. | Nystel, J.p."a" #3 | 11,494 | 44530824 |
| 528564 | Feb 20, 2003 | Feb 20, 2003 | XTO Energy Inc. | Prentice Northeast Unit #800 | 7,296 | 44532015 |
| 528563 | Feb 20, 2003 | Feb 20, 2003 | XTO Energy Inc. | Prentice Northeast Unit #541 | 7,028 | 44532014 |
| 528562 | Feb 20, 2003 | Feb 20, 2003 | XTO Energy Inc. | Prentice Northeast Unit #517 | 7,175 | 44532013 |
| 528561 | Feb 20, 2003 | Feb 20, 2003 | XTO Energy Inc. | Prentice Northeast Unit #510 | 7,365 | 44532012 |
| 528560 | Feb 20, 2003 | Feb 20, 2003 | XTO Energy Inc. | Prentice Northeast Unit #508 | 7,405 | 44532011 |
| 528559 | Feb 20, 2003 | Feb 20, 2003 | XTO Energy Inc. | Prentice Northeast Unit #504 | 7,371 | 44532010 |
| 528557 | Feb 20, 2003 | Feb 20, 2003 | XTO Energy Inc. | Prentice Northeast Unit #301 | 7,380 | 44532008 |
| 528555 | Feb 20, 2003 | Feb 20, 2003 | XTO Energy Inc. | Prentice Northeast Unit #271 | 7,345 | 44532007 |
| 527559 | Jan 22, 2003 | Jan 22, 2003 | Devon Energy Production Co, L.P. | North Welch Unit #1904H | 4,938 | 44530593 |
| 527559Amendment | Jan 22, 2003 | Jan 22, 2003 | Devon Energy Production Co, L.P. | North Welch Unit #1904H | 4,938 | 44530593 |
| 527559Amendment | Jan 22, 2003 | Jan 22, 2003 | Devon Energy Production Co, L.P. | North Welch Unit #1904H | 4,938 | 44530593 |
| 527559Amendment | Jan 22, 2003 | Jan 22, 2003 | Devon Energy Production Co, L.P. | North Welch Unit #1904HH | 4,909 | 44530593 |
| 525827 | Nov 22, 2002 | Nov 22, 2002 | Miller, Dyer & Co. LLC | McGowan #1 | 10,500 | 44532006 |
| 525358 | Nov 8, 2002 | Nov 8, 2002 | Devon Energy Production Co, L.P. | North Welch Unit #3304WH | 4,948 | 44530330 |
| 525358Amendment | Nov 8, 2002 | Nov 8, 2002 | Devon Energy Production Co, L.P. | North Welch Unit #3304WH | 4,927 | 44530330 |
| 525103 | Oct 30, 2002 | Oct 30, 2002 | Barrett Brothers Oil & Gas, Inc. | Borne, JO Anne #1 | 11,500 | 44532002 |
| 525103Amendment | Oct 30, 2002 | Oct 30, 2002 | Barrett Brothers Oil & Gas, Inc. | Borne, Joanne #1 | 11,500 | 44532002 |
| 523220 | Aug 30, 2002 | Aug 30, 2002 | Landreth, Robert E. | Nystel, J. P. "B" #8 | 5,000 | 44532005 |
| 523213 | Aug 29, 2002 | Aug 29, 2002 | Landreth, Robert E. | Nystel, J. P. "B" #7 | 5,000 | 44532004 |
| 522886 | Aug 19, 2002 | Aug 19, 2002 | Occidental Permian Ltd. | Kennedy, R. C. #2 | 8,400 | 44532003 |
| 522577 | Aug 12, 2002 | Aug 12, 2002 | XTO Energy Inc. | Prentice Northeast Unit #35 | 6,750 | 44500299 |
| 522284 | Aug 1, 2002 | Aug 1, 2002 | Great Western Drlg. Co. | Suntura #7 | 8,300 | 44532000 |
| 522285 | Jul 31, 2002 | Jul 31, 2002 | Great Western Drlg. Co. | Suntura #8 | 8,300 | 44532001 |
| 522283 | Jul 31, 2002 | Jul 31, 2002 | Great Western Drlg. Co. | Suntura #3A | 8,300 | 44531999 |
| 522228 | Jul 31, 2002 | Jul 31, 2002 | XTO Energy Inc. | Prentice Northeast Unit #519 | 7,275 | 44531995 |
| 522278 | Jul 29, 2002 | Jul 29, 2002 | BP America Production Company | Beck, G. L. #2 | 8,500 | 44531998 |
| 522277 | Jul 29, 2002 | Jul 29, 2002 | BP America Production Company | Beck, G. L. #3 | 8,500 | 44531997 |
| 522276 | Jul 29, 2002 | Jul 29, 2002 | BP America Production Company | Beck, G. L. #4 | 8,500 | 44531996 |
| 522118 | Jul 29, 2002 | Jul 29, 2002 | Great Western Drlg. Co. | Boggs-Davidson #3 | 8,300 | 44531994 |
| 522097 | Jul 29, 2002 | Jul 29, 2002 | XTO Energy Inc. | Prentice Northeast Unit #622 | 7,430 | 44531992 |
| 522096 | Jul 29, 2002 | Jul 29, 2002 | XTO Energy Inc. | Prentice Northeast Unit #300 | 7,315 | 44531991 |
| 522095 | Jul 29, 2002 | Jul 29, 2002 | XTO Energy Inc. | Prentice Northeast Unit #550 | 7,235 | 44531990 |
| 522095Amendment | Jul 29, 2002 | Jul 29, 2002 | XTO Energy Inc. | Prentice Northeast Unit #550 | 7,235 | 44531990 |
| 522094 | Jul 29, 2002 | Jul 29, 2002 | XTO Energy Inc. | Prentice Northeast Unit #562 | 7,420 | 44531989 |
| 522093 | Jul 29, 2002 | Jul 29, 2002 | XTO Energy Inc. | Prentice Northeast Unit #560 | 7,430 | 44531988 |
| 522091 | Jul 29, 2002 | Jul 29, 2002 | XTO Energy Inc. | Prentice Northeast Unit #607 | 8,500 | 44531986 |
| 522091Amendment | Jul 29, 2002 | Jul 29, 2002 | XTO Energy Inc. | Covington, Ella "B" #18 | 8,500 | 44531986 |
| 522092 | Jul 26, 2002 | Jul 26, 2002 | XTO Energy Inc. | Prentice Northeast Unit #522 | 7,225 | 44531987 |
| 522119 | Jul 24, 2002 | Jul 24, 2002 | Great Western Drlg. Co. | Jordan BP #1 | 8,500 | 44531993 |
| 522119Amendment | Jul 24, 2002 | Jul 24, 2002 | Great Western Drlg. Co. | Jordan BP #1 | 8,500 | 44531993 |
| 521353 | Jun 27, 2002 | Jun 27, 2002 | Gruy Petroleum Management Co. | Red Raider #1 | 9,000 | 44531984 |
| 520798 | Jun 18, 2002 | Jun 18, 2002 | Chevron U. S. A. Inc. | Mallet Land & Cattle Co. #114 | 7,660 | 44531907 |
| 518676 | Jun 11, 2002 | Jun 11, 2002 | Devon SFS Operating, Inc. | Wellman West Unit #35HH | 5,700 | 44531894 |
| 518676Amendment | Jun 11, 2002 | Jun 11, 2002 | Devon Energy Production Co, L.P. | Wellman West Unit #35HH | 5,700 | 44531894 |
| 520603 | Jun 7, 2002 | Jun 7, 2002 | Chevron U. S. A. Inc. | Mallet Land & Cattle Co. #115H | 10,000 | 44531908 |
| 520602 | Jun 4, 2002 | Jun 4, 2002 | Chevron U. S. A. Inc. | Mallet Land & Cattle Co. #112H | 10,000 | 44531900 |
| 520370 | May 30, 2002 | May 30, 2002 | Occidental Permian Ltd. | Kennedy, R. C. #1 | 8,400 | 44531983 |
| 520328 | May 28, 2002 | May 28, 2002 | Chevron U. S. A. Inc. | Mallet Land & Cattle Co. #113H | 10,000 | 44531899 |
| 519336 | Apr 22, 2002 | Apr 22, 2002 | BP America Production Company | Beck, G. L. #1 | 9,000 | 44531982 |
| 517478 | Feb 11, 2002 | Feb 11, 2002 | Devon Energy Production Co, L.P. | Wellman, West Unit #33HH | 5,570 | 44531861 |
| 517477 | Feb 11, 2002 | Feb 11, 2002 | Devon Energy Production Co, L.P. | Wellman, West Unit #24HH | 5,570 | 44531903 |
| 517477Amendment | Feb 11, 2002 | Feb 11, 2002 | Devon Energy Production Co, L.P. | Wellman, West Unit #24HH | 5,570 | 44531903 |
| 517454 | Feb 11, 2002 | Feb 11, 2002 | Great Western Drlg. Co. | Clare, Brit #17 | 8,600 | 44531981 |
| 516986 | Feb 5, 2002 | Feb 5, 2002 | Great Western Drlg. Co. | Geodyne Deep #2 | 9,200 | 44531920 |
| 516987 | Jan 24, 2002 | Jan 24, 2002 | Great Western Drlg. Co. | Clare, Brit #18 | 8,600 | 44531980 |
| 515768 | Dec 7, 2001 | Dec 7, 2001 | Trail Mountain, Inc. | Mabee #4 | 8,500 | 44531979 |
| 515722 | Dec 5, 2001 | Dec 5, 2001 | Great Western Drlg. Co. | Jacobson #38 | 8,100 | 44531978 |
| 515730 | Nov 30, 2001 | Nov 30, 2001 | Gruy Petroleum Management Co. | Hufnall #1 | 9,000 | 44531977 |
| 515603 | Nov 29, 2001 | Nov 29, 2001 | Trail Mountain, Inc. | Jones #3 | 8,900 | 44531815 |
| 515079 | Nov 7, 2001 | Nov 7, 2001 | Great Western Drlg. Co. | Boggs - Davidson #2 | 8,200 | 44531975 |
| 515078 | Nov 7, 2001 | Nov 7, 2001 | Great Western Drlg. Co. | Boggs - Davidson #1 | 8,200 | 44531976 |
| 514957 | Nov 2, 2001 | Nov 2, 2001 | R K Petroleum Corporation | Bucy #1 | 10,200 | 44531974 |
| 513254 | Sep 5, 2001 | Sep 5, 2001 | Young, Marshall R., Oil Company | Northwest Terry (Abo) Unit #309 | 8,200 | 44531973 |
| 512539 | Aug 15, 2001 | Aug 15, 2001 | Great Western Drlg. Co. | Brit Claire #16 | 8,300 | 44531972 |
| 512251 | Aug 6, 2001 | Aug 6, 2001 | Gruy Petroleum Management Co. | Granbury #3 | 9,000 | 44531971 |
| 512250 | Aug 6, 2001 | Aug 6, 2001 | Gruy Petroleum Management Co. | Granbury #2 | 9,000 | 44531970 |
| 512153 | Aug 6, 2001 | Aug 6, 2001 | XTO Energy Inc. | Prentice Northeast Unit #666 | 7,100 | 44531721 |
| 512058 | Aug 6, 2001 | Aug 6, 2001 | Occidental Permian Ltd. | Brownfield Clay #1 | 8,100 | 44531969 |
| 511347 | Jul 12, 2001 | Jul 12, 2001 | Trail Mountain, Inc. | Texland #1 | 8,500 | 44532095 |
| 511089 | Jul 11, 2001 | Jul 11, 2001 | Great Western Drlg. Co. | Pool "A" #1 | 8,300 | 44531967 |
| 511097 | Jul 6, 2001 | Jul 6, 2001 | Trail Mountain, Inc. | Mabee #3 | 8,500 | 44531966 |
| 510801 | Jul 3, 2001 | Jul 3, 2001 | Great Western Drlg. Co. | Suntura #6 | 8,300 | 44531965 |
| 510167 | Jun 12, 2001 | Jun 12, 2001 | Trail Mountain, Inc. | Mabee #2 | 8,500 | 44531960 |
| 506656 | May 9, 2001 | May 9, 2001 | Amerada Hess Corporation | Adair Wolfcamp Unit #2303 | 9,000 | 44500048 |
| 506656Amendment | May 9, 2001 | May 9, 2001 | Apache Corporation | Adair Wolfcamp Unit #2303 | 9,000 | 44500048 |
| 507958 | Apr 19, 2001 | Apr 19, 2001 | Trail Mountain, Inc. | Helen #6 | 8,500 | 44531964 |
| 507454 | Apr 13, 2001 | Apr 13, 2001 | Great Western Drlg. Co. | Suntura #2A | 8,200 | 44531963 |
| 507391 | Apr 5, 2001 | Apr 5, 2001 | Devon Energy Production Co, L.P. | North Welch Unit #2704HH | 4,962 | 44530019 |
| 507391Amendment | Apr 5, 2001 | Apr 5, 2001 | Devon Energy Production Co, L.P. | North Welch Unit #2704HH | 4,962 | 44530019 |
| 507390 | Apr 5, 2001 | Apr 5, 2001 | Devon Energy Production Co, L.P. | North Welch Unit #201HH | 4,955 | 44530648 |
| 507219 | Mar 30, 2001 | Mar 30, 2001 | Cross Timbers Operating Company | Prentice Northeast Unit #523 | 7,315 | 44531961 |
| 507218 | Mar 30, 2001 | Mar 30, 2001 | Cross Timbers Operating Company | Prentice Northeast Unit #534 | 7,400 | 44531962 |
| 506895 | Mar 23, 2001 | Mar 23, 2001 | Trail Mountain, Inc. | Jones #4 | 8,000 | 44531959 |
| 506895Amendment | Mar 23, 2001 | Mar 23, 2001 | Trail Mountain, Inc. | Jones #4 | 8,000 | 44531959 |
| 506894 | Mar 23, 2001 | Mar 23, 2001 | Trail Mountain, Inc. | Mabee #2 | 8,500 | 44531960 |
| 506894Amendment | Mar 23, 2001 | Mar 23, 2001 | Trail Mountain, Inc. | Mabee #2 | 8,500 | 44531960 |
| 506894Amendment | Mar 23, 2001 | Mar 23, 2001 | Trail Mountain, Inc. | Mabee #2 | 8,500 | 44531960 |
| 506712 | Mar 20, 2001 | Mar 20, 2001 | Cross Timbers Operating Company | Prentice Northeast Unit #547 | 7,300 | 44531958 |
| 506711 | Mar 20, 2001 | Mar 20, 2001 | Cross Timbers Operating Company | Prentice Northeast Unit #587 | 7,450 | 44531957 |
| 506710 | Mar 20, 2001 | Mar 20, 2001 | Cross Timbers Operating Company | Prentice Northeast Unit #589 | 7,450 | 44531956 |
| 506709 | Mar 20, 2001 | Mar 20, 2001 | Cross Timbers Operating Company | Prentice Northeast Unit #646 | 7,400 | 44531955 |
| 506708 | Mar 20, 2001 | Mar 20, 2001 | Cross Timbers Operating Company | Prentice Northeast Unit #590 | 7,380 | 44531954 |
| 506707 | Mar 20, 2001 | Mar 20, 2001 | Cross Timbers Operating Company | Prentice Northeast Unit #688 | 7,125 | 44531953 |
| 506706 | Mar 20, 2001 | Mar 20, 2001 | Cross Timbers Operating Company | Prentice Northeast Unit #724 | 7,300 | 44531952 |