| Piwonka-Matcek Unit O-3-15142 | Williams, Clayton Energy, Inc. | Giddings (Austin Chalk-3) | Burleson | 1 | 16.2K | 146K | by Jan 1993 – Mar 2001 |
| Milburn O-3-17825 | Williams, Clayton Energy, Inc. | Dime Box (Navarro) | Lee | 4 | 16.1K | 7.22K | by Jan 1993 – Oct 2011 |
| Union Texas Carnes O-1-12791 | Williams, Clayton Energy, Inc. | Pearsall (Austin Chalk) | Frio | 1 | 15.2K | 21 | by Jan 1993 – Sep 2002 |
| Wilson, M. J. O-10-28459 | Williams, Clayton Energy, Inc. | Jameson N. (Odom) | Mitchell | 3 | 15.2K | 41.6K | by Jan 1993 – Apr 2012 |
| McSwain-Glenn Unit O-3-15164 | Williams, Clayton Energy, Inc. | Giddings (Austin Chalk-3) | Brazos | 2 | 14.7K | 181K | by Jan 1993 – Sep 1996 |
| Ryan, W.H. "A" O-3-14981 | Williams, Clayton Energy, Inc. | Giddings (Austin Chalk-3) | Burleson | 2 | 14.6K | 155K | by Jan 1993 – Mar 2001 |
| Nigliazzo Horizontal O-5-3406 | Williams, Clayton Energy, Inc. | Sutton (Austin Chalk) | Robertson | 1 | 13.7K | 102 | by Jan 1993 – Dec 2006 |
| Siegert Unit O-3-22913 | Williams, Clayton Energy, Inc. | Giddings (Austin Chalk-3) | Robertson | 1 | 13.4K | 3.56K | Dec 1995 – Jan 1999 |
| Andrews University 33 O-10-37675 | Williams, Clayton Energy, Inc. | Block 5 (Wolfcamp) | Andrews | 1 | 13.2K | 14.4K | Nov 2005 – Apr 2008 |
| Arhopulos-Crenshaw Unit G-3-147564 | Williams, Clayton Energy, Inc. | Giddings (Austin Chalk, Gas) | Brazos | 1 | 13.2K | 583K | Sep 1993 – Jul 2013 |
| Peters, Alwine O-3-15273 | Williams, Clayton Energy, Inc. | Giddings (Austin Chalk-3) | Burleson | 1 | 12.9K | 94.7K | by Jan 1993 – Apr 2003 |
| Roecker G-3-130233 | Williams, Clayton Energy, Inc. | Black Owl (Yegua 8150) | Wharton | 1 | 12.9K | 169K | by Jan 1993 – Jan 2002 |
| Kain O-1-12566 | Williams, Clayton Energy, Inc. | Pearsall (Austin Chalk) | Frio | 2 | 12K | 21 | by Jan 1993 – Apr 1996 |
| Lewis-Monical O-3-23375 | Williams, Clayton Energy, Inc. | Giddings (Buda) | Burleson | 1 | 11.2K | 3.94K | Oct 1997 – Jul 2006 |
| Wintershall-Kersh Unit O-1-13281 | Williams, Clayton Energy, Inc. | Pearsall (Austin Chalk) | La Salle | 1 | 11.1K | 12.2K | by Jan 1993 – Apr 1995 |
| Garza "B" Unit O-3-15641 | Williams, Clayton Energy, Inc. | Giddings (Austin Chalk-3) | Brazos | 2 | 11K | 175K | by Jan 1993 – Dec 1999 |
| Stubblefield, Frankie -A- O-10-24636 | Williams, Clayton Energy, Inc. | Jameson, North (Strawn) | Mitchell | 2 | 10.6K | 2.45K | by Jan 1993 – Jan 2001 |
| Kachtik, Thomas Unit O-3-15850 | Williams, Clayton Energy, Inc. | Giddings (Austin Chalk-3) | Burleson | 1 | 10.4K | 261K | by Jan 1993 – Mar 2001 |
| Nicholson Heirs Unit O-1-12373 | Williams, Clayton Energy, Inc. | Pearsall (Austin Chalk) | Frio | 1 | 10.3K | 21 | by Jan 1993 – Oct 1997 |
| Brunson "B" O-10-42323 | Williams, Clayton Energy, Inc. | Slash Ranch (Wolfcamp) | Loving | 1 | 10.1K | 0 | Nov 2011 – Sep 2012 |
| Nigliazzo O-3-20897 | Williams, Clayton Energy, Inc. | Kurten (Austin Chalk) | Robertson | 1 | 10K | 102 | by Jan 1993 – Feb 2006 |
| Matcek, Joseph Unit O-3-15312 | Williams, Clayton Energy, Inc. | Giddings (Austin Chalk-3) | Burleson | 1 | 9.79K | 178K | by Jan 1993 – Oct 1999 |
| Union Texas Hugo O-1-12796 | Williams, Clayton Energy, Inc. | Pearsall (Austin Chalk) | Frio | 1 | 9.73K | 2.54K | by Jan 1993 – Mar 1995 |
| CR Foster O-10-41093 | Williams, Clayton Energy, Inc. | Spraberry (Trend Area) | Glasscock | 4 | 9.61K | 6.7K | Mar 2011 – Aug 2012 |
| Gold-Ryan Unit O-3-15470 | Williams, Clayton Energy, Inc. | Giddings (Austin Chalk-3) | Burleson | 1 | 9.56K | 44.1K | by Jan 1993 – Oct 1999 |
| Gold-Piwonka Unit O-3-15143 | Williams, Clayton Energy, Inc. | Giddings (Austin Chalk-3) | Burleson | 1 | 9.14K | 102K | by Jan 1993 – Mar 2001 |
| University 36 O-9-15819 | Williams, Clayton Energy, Inc. | Spraberry (Trend Area) | Crockett | 1 | 9.06K | 10.7K | Oct 2005 – Jun 2008 |
| Andrews University 10 O-10-40042 | Williams, Clayton Energy, Inc. | Spraberry (Trend Area) | Andrews | 2 | 8.72K | 27.5K | Feb 2010 – Mar 2016 |
| Nilson G-3-122374 | Williams, Clayton Energy, Inc. | El Campo, NE (Yegua) | Wharton | 1 | 8.7K | 169K | by Jan 1993 – Nov 2000 |
| Kazmir-Matcek Unit "A" O-3-14866 | Williams, Clayton Energy, Inc. | Giddings (Austin Chalk-3) | Burleson | 1 | 8.69K | 88.2K | by Jan 1993 – Mar 2001 |
| Wintershall-Arhopulos Unit G-3-141476 | Williams, Clayton Energy, Inc. | Giddings (Austin Chalk, Gas) | Brazos | 1 | 8.62K | 413K | by Jan 1993 – Nov 1994 |
| Kazmir-Matcek Unit "B" O-3-15811 | Williams, Clayton Energy, Inc. | Giddings (Austin Chalk-3) | Burleson | 1 | 8.55K | 117K | by Jan 1993 – Jul 2000 |
| Wintershall-Kersh Unit "A" O-1-13583 | Williams, Clayton Energy, Inc. | Pearsall (Austin Chalk) | La Salle | 1 | 8.12K | 6.74K | by Jan 1993 – Apr 1995 |
| Sealy Smith Unit G-3-148181 | Williams, Clayton Energy, Inc. | Giddings (Austin Chalk, Gas) | Burleson | 1 | 7.75K | 213K | Jan 1994 – Jan 2002 |
| Kain Unit O-1-13029 | Williams, Clayton Energy, Inc. | Pearsall (Austin Chalk) | Frio | 1 | 7.55K | 21 | by Jan 1993 – Jan 1996 |
| Higgins Johnson O-11-68880 | Williams, Clayton Energy, Inc. | Amrow, North (Wolfcamp) | Gaines | 1 | 7.36K | 0 | Jan 2006 – Sep 2015 |
| McGruder-Anderson Unit O-3-21934 | Williams, Clayton Energy, Inc. | Giddings (Buda) | Brazos | 1 | 7.35K | 15K | Mar 1993 – Mar 1993 |
| University 34 O-9-15844 | Williams, Clayton Energy, Inc. | Spraberry (Trend Area) | Crockett | 1 | 7.29K | 20.9K | Oct 2005 – Aug 2009 |
| Garza B Unit G-3-148226 | Williams, Clayton Energy, Inc. | Giddings (Austin Chalk, Gas) | Brazos | 1 | 6.95K | 97.7K | Jun 1993 – Jul 1996 |
| Gloyna, W. E. O-3-15384 | Williams, Clayton Energy, Inc. | Caldwell (Austin Chalk) | Burleson | 1 | 6.39K | 39 | by Jan 1993 – Oct 2000 |
| University 32 O-9-15868 | Williams, Clayton Energy, Inc. | Spraberry (Trend Area) | Crockett | 1 | 5.51K | 9.3K | Nov 2005 – Nov 2009 |
| Porter, E.B. O-3-22062 | Williams, Clayton Energy, Inc. | Giddings (Buda) | Burleson | 1 | 5.44K | 41.6K | Jun 1993 – Jul 2006 |
| University 26 O-9-15879 | Williams, Clayton Energy, Inc. | Spraberry (Trend Area) | Crockett | 1 | 5.26K | 20.1K | Jan 2006 – Nov 2009 |
| Matcek, Frank O-3-22646 | Williams, Clayton Energy, Inc. | Giddings (Austin Chalk-3) | Burleson | 1 | 5.18K | 66.5K | Jan 1995 – Mar 1995 |
| Wintershall-Storey Unit O-1-13414 | Williams, Clayton Energy, Inc. | Pearsall (Austin Chalk) | La Salle | 1 | 5.08K | 12.1K | by Jan 1993 – Nov 1997 |
| Matcek, Frank Unit O-3-15141 | Williams, Clayton Energy, Inc. | Giddings (Austin Chalk-3) | Burleson | 1 | 4.88K | 116K | by Jan 1993 – Feb 2004 |
| Neyland Unit G-5-230025 | Williams, Clayton Energy, Inc. | Bald Prairie (Pettit) | Robertson | 1 | 4.81K | 197K | Feb 2007 – Apr 2013 |
| Brinkman, Bernice O-3-14311 | Williams, Clayton Energy, Inc. | Giddings (Austin Chalk-3) | Burleson | 1 | 4.43K | 53K | by Jan 1993 – May 2000 |
| Samson University '7' O-10-44945 | Williams, Clayton Energy, Inc. | Magutex (Miss.) | Andrews | 1 | 4.17K | 9.12K | Dec 2013 – Aug 2014 |
| Burns E-F Unit "A" O-1-13200 | Williams, Clayton Energy, Inc. | Pearsall (Austin Chalk) | La Salle | 1 | 4.17K | 2.81K | by Jan 1993 – May 2000 |