| 651005 | Dec 18, 2007 | Dec 18, 2007 | Williams, Clayton Energy, Inc. | Burleson | Eagleton #3H | 6,900 | 05133635 |
| 651005Amendment | Dec 18, 2007 | Dec 18, 2007 | Williams, Clayton Energy, Inc. | Burleson | Eagleton #3H | 6,800 | 05133635 |
| 649073 | Nov 15, 2007 | Nov 15, 2007 | Williams, Clayton Energy, Inc. | Burleson | Urbanovsky Unit #2H | 6,800 | 05133634 |
| 649073Amendment | Nov 15, 2007 | Nov 15, 2007 | Williams, Clayton Energy, Inc. | Burleson | Urbanovsky Unit #2H | 6,800 | 05133634 |
| 647783 | Oct 18, 2007 | Oct 18, 2007 | Williams, Clayton Energy, Inc. | Burleson | Weeber, Oscar Unit #1H | 6,800 | 05133633 |
| 647783Amendment | Oct 18, 2007 | Oct 18, 2007 | Williams, Clayton Energy, Inc. | Burleson | Oscar Weeber Unit #1H | 6,800 | 05133633 |
| 644956 | Aug 28, 2007 | Aug 28, 2007 | Williams, Clayton Energy, Inc. | Mitchell | McCabe, J. F. -C- #1 | 7,239 | 33532360 |
| 644562 | Aug 24, 2007 | Aug 24, 2007 | Williams, Clayton Energy, Inc. | Robertson | Cotropia-Ferrara Unit #4H | 6,100 | 39531323 |
| 644562Amendment | Aug 24, 2007 | Aug 24, 2007 | Williams, Clayton Energy, Inc. | Robertson | Cotropia-Ferrara Unit #4H | 6,100 | 39531323 |
| 644562Amendment | Aug 24, 2007 | Aug 24, 2007 | Williams, Clayton Energy, Inc. | Robertson | Cotropia-Ferrara Unit #4H | 6,046 | 39531323 |
| 644690 | Aug 22, 2007 | Aug 22, 2007 | Williams, Clayton Energy, Inc. | Robertson | Scamardo-Cotropia Unit #3H | 6,100 | 39531327 |
| 644690Amendment | Aug 22, 2007 | Aug 22, 2007 | Williams, Clayton Energy, Inc. | Robertson | Scamardo-Cotropia Unit #3H | 6,100 | 39531327 |
| 644690Amendment | Aug 22, 2007 | Aug 22, 2007 | Williams, Clayton Energy, Inc. | Robertson | Scamardo-Cotropia Unit #3H | 6,100 | 39531327 |
| 644544 | Aug 21, 2007 | Aug 21, 2007 | Williams, Clayton Energy, Inc. | Burleson | Palmer-Williams Unit #1H | 6,800 | 05133631 |
| 644544Amendment | Aug 21, 2007 | Aug 21, 2007 | Williams, Clayton Energy, Inc. | Burleson | Palmer-Williams Unit #1H | 6,800 | 05133631 |
| 643960 | Aug 13, 2007 | Aug 13, 2007 | Williams, Clayton Energy, Inc. | Robertson | State-Cotropia Unit #1H | 6,000 | 39531321 |
| 643960Amendment | Aug 13, 2007 | Aug 13, 2007 | Williams, Clayton Energy, Inc. | Robertson | State-Cotropia Unit #1H | 6,000 | 39531321 |
| 636504 | Apr 12, 2007 | Apr 12, 2007 | Williams, Clayton Energy, Inc. | Robertson | Margarita #1 | 20,000 | 39531272 |
| 636504Amendment | Apr 12, 2007 | Apr 12, 2007 | Williams, Clayton Energy, Inc. | Robertson | Margarita #1 | 18,280 | 39531272 |
| 636505 | Apr 6, 2007 | Apr 6, 2007 | Williams, Clayton Energy, Inc. | Burleson | Monical, Lewis #1REH | 7,500 | 05132664 |
| 635210 | Mar 20, 2007 | Mar 20, 2007 | Williams, Clayton Energy, Inc. | Leon | Big Bill Simpson Unit #1 | 20,000 | 28931654 |
| 632805 | Feb 5, 2007 | Feb 5, 2007 | Williams, Clayton Energy, Inc. | Robertson | Neyland Unit #1 | 10,574 | 39530632 |
| 632805Amendment | Feb 5, 2007 | Feb 5, 2007 | Williams, Clayton Energy, Inc. | Robertson | Neyland Unit #1 | 10,574 | 39530632 |
| 632802 | Feb 5, 2007 | Feb 5, 2007 | Williams, Clayton Energy, Inc. | Milam | Frazier I. F. Unit #20H | 6,000 | 33133621 |
| 632801 | Feb 5, 2007 | Feb 5, 2007 | Williams, Clayton Energy, Inc. | Burleson | Davis, Viola #1H | 7,500 | 05133630 |
| 632801Amendment | Feb 5, 2007 | Feb 5, 2007 | Williams, Clayton Energy, Inc. | Burleson | Davis, Viola #1H | 6,900 | 05133630 |
| 610217 | Nov 30, 2005 | Nov 30, 2005 | Williams, Clayton Energy, Inc. | Gaines | Higgins Johnson #1 | 11,400 | 16536452 |
| 608542 | Nov 2, 2005 | Nov 2, 2005 | Williams, Clayton Energy, Inc. | Crockett | University 28 #1 | 11,000 | 10539807 |
| 608547 | Nov 1, 2005 | Nov 1, 2005 | Williams, Clayton Energy, Inc. | Upton | Hanks, Freda #1 | 11,500 | 46134941 |
| 608681 | Oct 31, 2005 | Oct 31, 2005 | Williams, Clayton Energy, Inc. | Pecos | Leoncita State 122 #1RH | 9,500 | 37137636 |
| 608546 | Oct 28, 2005 | Oct 28, 2005 | Williams, Clayton Energy, Inc. | Crockett | University 31 #1 | 10,000 | 10539806 |
| 608533 | Oct 28, 2005 | Oct 28, 2005 | Williams, Clayton Energy, Inc. | Crockett | University 26 #1 | 10,000 | 10539805 |
| 608530 | Oct 28, 2005 | Oct 28, 2005 | Williams, Clayton Energy, Inc. | Upton | University 18 #1 | 10,000 | 46134940 |
| 607450 | Oct 6, 2005 | Oct 6, 2005 | Williams, Clayton Energy, Inc. | Gaines | Savage Family Trust #1 | 11,400 | 16536431 |
| 607450Amendment | Oct 6, 2005 | Oct 6, 2005 | Williams, Clayton Energy, Inc. | Gaines | Savage Family Trust #1 | 12,000 | 16536431 |
| 607449 | Oct 6, 2005 | Oct 6, 2005 | Williams, Clayton Energy, Inc. | Pecos | Leoncita State 122 #1H | 9,500 | 37137627 |
| 606903 | Sep 26, 2005 | Sep 26, 2005 | Williams, Clayton Energy, Inc. | Crockett | University 19 #1 | 10,000 | 10539776 |
| 605218 | Aug 19, 2005 | Aug 19, 2005 | Williams, Clayton Energy, Inc. | Andrews | Andrews University 33 #1 | 12,000 | 00339650 |
| 605216 | Aug 19, 2005 | Aug 19, 2005 | Williams, Clayton Energy, Inc. | Crockett | University 36 #1 | 10,500 | 10539747 |
| 605216Amendment | Aug 19, 2005 | Aug 19, 2005 | Williams, Clayton Energy, Inc. | Crockett | University 36 #1 | 10,500 | 10539747 |
| 604184 | Aug 1, 2005 | Aug 1, 2005 | Williams, Clayton Energy, Inc. | Crockett | University 34 #1 | 10,500 | 10539720 |
| 604183 | Aug 1, 2005 | Aug 1, 2005 | Williams, Clayton Energy, Inc. | Crockett | University 32 #1 | 10,500 | 10539719 |
| 604090 | Jul 28, 2005 | Jul 28, 2005 | Williams, Clayton Energy, Inc. | Andrews | Andrews University 21 #1 | 12,000 | 00339632 |
| 600258 | May 5, 2005 | May 5, 2005 | Williams, Clayton Energy, Inc. | Nueces | Deer-Hamilton #1 | 18,000 | 35533728 |
| 600092 | May 3, 2005 | May 3, 2005 | Williams, Clayton Energy, Inc. | Crockett | University 25 #1 | 10,500 | 10539601 |
| 547400 | Jun 24, 2004 | Jun 24, 2004 | Williams, Clayton Energy, Inc. | Robertson | Catherine Destefano Unit #1 | 16,500 | 39530917 |
| 547400Amendment | Jun 24, 2004 | Jun 24, 2004 | Williams, Clayton Energy, Inc. | Robertson | Catherine Destefano Unit #1 | 16,500 | 39530917 |
| 547400Amendment | Jun 24, 2004 | Jun 24, 2004 | Williams, Clayton Energy, Inc. | Robertson | Catherine Destefano Unit #1 | 15,000 | 39530917 |
| 527171 | Jan 10, 2003 | Jan 10, 2003 | Williams, Clayton Energy, Inc. | Robertson | Muse-Patranella Gas Unit #1 | 18,500 | 39530781 |
| 527151 | Oct 31, 2002 | Oct 31, 2002 | Williams, Clayton Energy, Inc. | Ward | Medlock 64 #1HH | 19,100 | 47534729 |
| 524715 | Oct 17, 2002 | Oct 17, 2002 | Williams, Clayton Energy, Inc. | Robertson | Scamardo Gas Unit #1 | 17,500 | 39530705 |
| 522592 | Aug 7, 2002 | Aug 7, 2002 | Williams, Clayton Energy, Inc. | Robertson | Cotropia Gas Unit #1 | 17,500 | 39530751 |
| 518165 | Mar 8, 2002 | Mar 8, 2002 | Williams, Clayton Energy, Inc. | Reeves | TXL "9" #1 | 5,500 | 38932247 |
| 518164 | Mar 8, 2002 | Mar 8, 2002 | Williams, Clayton Energy, Inc. | Reeves | Andros State "B" #1 | 4,000 | 38932246 |
| 514274 | Oct 10, 2001 | Oct 10, 2001 | Williams, Clayton Energy, Inc. | Robertson | Scamardo Gas Unit #1 | 17,500 | 39530705 |
| 512920 | Aug 24, 2001 | Aug 24, 2001 | Williams, Clayton Energy, Inc. | Ward | Medlock 64 #1HH | 17,000 | 47534729 |
| 512920Amendment | Aug 24, 2001 | Aug 24, 2001 | Williams, Clayton Energy, Inc. | Ward | Medlock 64 #1HH | 19,100 | 47534729 |
| 508196 | Jun 25, 2001 | Jun 25, 2001 | Williams, Clayton Energy, Inc. | Burleson | Gold North Unit #1HH | 9,000 | 05133600 |
| 509849 | Jun 5, 2001 | Jun 5, 2001 | Williams, Clayton Energy, Inc. | Robertson | Fazzino, Lee Unit #2 | 17,000 | 39530669 |
| 509849Amendment | Jun 5, 2001 | Jun 5, 2001 | Williams, Clayton Energy, Inc. | Robertson | Lee Fazzino Unit #2 | 17,000 | 39530669 |
| 509141 | May 18, 2001 | May 18, 2001 | Williams, Clayton Energy, Inc. | Robertson | Muse-Nigliazzo Unit #1H | 7,000 | 39530666 |
| 508548 | May 4, 2001 | May 4, 2001 | Williams, Clayton Energy, Inc. | Reeves | Andros State "2" #1 | 14,000 | 38932216 |
| 508434 | May 2, 2001 | May 2, 2001 | Williams, Clayton Energy, Inc. | Leon | M. P. Walker et al Unit #2 | 14,400 | 28931350 |
| 506696 | Mar 20, 2001 | Mar 20, 2001 | Williams, Clayton Energy, Inc. | Robertson | Alliance-Reistino Unit #1H | 7,500 | 39530651 |
| 506464 | Mar 14, 2001 | Mar 14, 2001 | Williams, Clayton Energy, Inc. | Leon | Grayson, Darwin B. et al Unit #1 | 14,400 | 28931344 |
| 505587 | Feb 21, 2001 | Feb 21, 2001 | Williams, Clayton Energy, Inc. | Milam | Supac-Royall Unit #1H | 7,000 | 33133528 |
| 505587Amendment | Feb 21, 2001 | Feb 21, 2001 | Williams, Clayton Energy, Inc. | Milam | Supac-Royall Unit #1H | 7,000 | 33133528 |
| 505282 | Feb 14, 2001 | Feb 14, 2001 | Williams, Clayton Energy, Inc. | Robertson | Robbins-Loria Unit #2H | 7,500 | 39530641 |
| 505282Amendment | Feb 14, 2001 | Feb 14, 2001 | Williams, Clayton Energy, Inc. | Robertson | Robbins-Loria Unit #2H | 7,500 | 39530641 |
| 504452 | Jan 24, 2001 | Jan 24, 2001 | Williams, Clayton Energy, Inc. | Robertson | Kubin, Frank Unit #1H | 7,500 | 39530636 |
| 504452Amendment | Jan 24, 2001 | Jan 24, 2001 | Williams, Clayton Energy, Inc. | Robertson | Kubin, Frank Unit #1H | 7,500 | 39530636 |
| 504267 | Jan 19, 2001 | Jan 19, 2001 | Williams, Clayton Energy, Inc. | Burleson | Hajovsky-Peavy Unit #1H | 7,500 | 05133595 |
| 503859 | Jan 10, 2001 | Jan 10, 2001 | Williams, Clayton Energy, Inc. | Robertson | Neyland Unit #1 | 14,500 | 39530632 |
| 503688 | Jan 5, 2001 | Jan 5, 2001 | Williams, Clayton Energy, Inc. | Wharton | Kuehnle #3 | 12,000 | 48134304 |
| 501822 | Dec 28, 2000 | Dec 28, 2000 | Williams, Clayton Energy, Inc. | Loving | Gataga Gas Unit #3 | 19,050 | 30130054 |
| 503266 | Dec 20, 2000 | Dec 20, 2000 | Williams, Clayton Energy, Inc. | Robertson | Ewell, Charlotte Unit #1H | 7,500 | 39530627 |
| 502872 | Dec 11, 2000 | Dec 11, 2000 | Williams, Clayton Energy, Inc. | Brazos | Armstrong Unit #1H | 9,900 | 04131519 |
| 502068 | Nov 17, 2000 | Nov 17, 2000 | Williams, Clayton Energy, Inc. | Robertson | Big Red Unit #1 | 17,500 | 39530625 |
| 501196 | Oct 26, 2000 | Oct 26, 2000 | Williams, Clayton Energy, Inc. | Burleson | Collins, Sallie Unit #1H | 7,500 | 05133591 |
| 500720 | Oct 13, 2000 | Oct 13, 2000 | Williams, Clayton Energy, Inc. | Robertson | Muse, Mary #1R | 13,200 | 39530620 |
| 500720Amendment | Oct 13, 2000 | Oct 13, 2000 | Williams, Clayton Energy, Inc. | Robertson | Muse, Mary #1R | 14,000 | 39530620 |
| 500618Amendment | Oct 10, 2000 | Oct 10, 2000 | Williams, Clayton Energy, Inc. | Duval | Driscoll-Duwell Unit #1 | 12,800 | 13138457 |
| 500618Amendment | Oct 10, 2000 | Oct 10, 2000 | Williams, Clayton Energy, Inc. | Duval | Driscoll-Duwell Unit #1 | 11,600 | 13138457 |
| 499923 | Oct 9, 2000 | Oct 9, 2000 | Williams, Clayton Energy, Inc. | Burleson | Trimm Unit #1H | 7,500 | 05133587 |
| 499923Amendment | Oct 9, 2000 | Oct 9, 2000 | Williams, Clayton Energy, Inc. | Burleson | Trimm Unit #1H | 7,000 | 05133587 |
| 500337 | Oct 4, 2000 | Oct 4, 2000 | Williams, Clayton Energy, Inc. | Loving | Gataga Gas Unit #4 | 17,280 | 30130059 |
| 500002 | Sep 26, 2000 | Sep 26, 2000 | Williams, Clayton Energy, Inc. | Robertson | Scamardo, Jonathan Paul Unit #1H | 7,500 | 39530617 |
| 499890 | Sep 22, 2000 | Sep 22, 2000 | Williams, Clayton Energy, Inc. | Robertson | Fazzino, Lee Unit #1 | 17,500 | 39530616 |
| 499224 | Sep 7, 2000 | Sep 7, 2000 | Williams, Clayton Energy, Inc. | Gregg | McWhorter, E. O. #8 | 11,000 | 18331429 |
| 499274 | Sep 6, 2000 | Sep 6, 2000 | Williams, Clayton Energy, Inc. | Robertson | S. P. Scamardo-Seilevco L Unit #1H | 7,500 | 39530613 |
| 499274Amendment | Sep 6, 2000 | Sep 6, 2000 | Williams, Clayton Energy, Inc. | Robertson | S. P. Scamardo-Seilevco L Unit #1H | 7,500 | 39530613 |
| 498123 | Aug 7, 2000 | Aug 7, 2000 | Williams, Clayton Energy, Inc. | Burleson | Peek-Rosenthal Unit #1H | 8,000 | 05133585 |
| 498123Amendment | Aug 7, 2000 | Aug 7, 2000 | Williams, Clayton Energy, Inc. | Burleson | Peek-Rosenthal Unit #1H | 8,000 | 05133585 |
| 497626 | Jul 31, 2000 | Jul 31, 2000 | Williams, Clayton Energy, Inc. | Gregg | Pugh Meadows Gas Unit #5 | 11,000 | 18331421 |
| 497625 | Jul 31, 2000 | Jul 31, 2000 | Williams, Clayton Energy, Inc. | Gregg | Pugh Meadows Gas Unit #6 | 11,000 | 18331420 |
| 496734 | Jun 30, 2000 | Jun 30, 2000 | Williams, Clayton Energy, Inc. | Burleson | Alford-Seilevco H Unit #1H | 7,500 | 05133584 |
| 496734Amendment | Jun 30, 2000 | Jun 30, 2000 | Williams, Clayton Energy, Inc. | Burleson | Alford-Seilevco H Unit #1H | 6,500 | 05133584 |
| 496530 | Jun 26, 2000 | Jun 26, 2000 | Williams, Clayton Energy, Inc. | Robertson | Muse Unit #1 | 17,500 | 39530609 |
| 496529 | Jun 26, 2000 | Jun 26, 2000 | Williams, Clayton Energy, Inc. | Robertson | Mary Muse Unit #1 | 13,200 | 39530610 |
| 496272 | Jun 20, 2000 | Jun 20, 2000 | Williams, Clayton Energy, Inc. | Gregg | Pugh Meadows Gas Unit #3 | 10,885 | 18330898 |