| Scanio, Miguelita G-2-179352 | Cummins & Walker Oil Co., Inc. | Refugio-Fox (6500) | Refugio | 1 | 11.5K | 56.6K | Jul 2000 – Mar 2001 |
| Welder, E. H. G-4-185471 | Cummins & Walker Oil Co., Inc. | Plymouth (I-25) | San Patricio | 1 | 7.43K | 830K | Sep 2001 – Jun 2004 |
| Dougherty Estate "A" G-2-105755 | Cummins & Walker Oil Co., Inc. | Mountain View, N. (8100) | Live Oak | 1 | 6.52K | 272K | Jan 1993 – Mar 1997 |
| Wood, L. Est. G-2-174416 | Cummins & Walker Oil Co., Inc. | Murphy L. (7000) | Refugio | 1 | 6.09K | 89.3K | Jun 1999 – Jan 2000 |
| Wood, L. Est. G-2-173633 | Cummins & Walker Oil Co., Inc. | Murphy L. (Sinton 1ST) | Refugio | 1 | 5.45K | 165K | Feb 1999 – Sep 1999 |
| Barber Unit G-2-181046 | Cummins & Walker Oil Co., Inc. | Agnes Barber (Chamberlain 2ND) | Refugio | 1 | 3.74K | 17.7K | Dec 2000 – Apr 2001 |
| Welder G-4-164236 | Cummins & Walker Oil Co., Inc. | Rooke (6100) | San Patricio | 1 | 3.54K | 136K | Oct 1997 – Jun 2003 |
| Welder, E. H. G-4-178765 | Cummins & Walker Oil Co., Inc. | Rooke (7100 A) | San Patricio | 1 | 3.22K | 226K | Jun 2000 – Dec 2001 |
| DHB G-2-195126 | Cummins & Walker Oil Co., Inc. | Edwards Ranch (5000) | Victoria | 1 | 2.25K | 714K | Apr 2003 – Jun 2008 |
| Wood, L. Est. G-2-182270 | Cummins & Walker Oil Co., Inc. | Woodsboro (6600) | Refugio | 1 | 2.2K | 32K | Feb 2001 – Aug 2001 |
| Wood, L. Est 'C' G-2-176332 | Cummins & Walker Oil Co., Inc. | Woodsboro (6500) | Refugio | 1 | 1.16K | 38.9K | Jan 2000 – May 2000 |
| O'Connor, M V Est G-2-200495 | Cummins & Walker Oil Co., Inc. | Refugio-Fox (5500) | Refugio | 1 | 688 | 220K | Dec 2003 – Jun 2010 |
| O'Brien-Harkins G-2-213467 | Cummins & Walker Oil Co., Inc. | Refugio-Fox (6300) | Refugio | 1 | 680 | 96.1K | Sep 2005 – Aug 2006 |
| Scanio, M "A" G-2-132955 | Cummins & Walker Oil Co., Inc. | Refugio-Fox (6220) | Refugio | 1 | 605 | 25K | Jan 1993 – Aug 1995 |
| Welder, M. S. Est. G-2-185227 | Cummins & Walker Oil Co., Inc. | Minnita (4000) | Victoria | 1 | 581 | 55.1K | Aug 2001 – May 2002 |
| Scanio, M. G-2-185221 | Cummins & Walker Oil Co., Inc. | Refugio-Fox (6300 A) | Refugio | 1 | 540 | 96.4K | Sep 2001 – Jun 2004 |
| L. Wood Est. G-2-175663 | Cummins & Walker Oil Co., Inc. | Woodsboro, West (4950) | Refugio | 1 | 423 | 284K | Nov 1999 – Dec 2001 |
| Williams, R. S. G-2-190410 | Cummins & Walker Oil Co., Inc. | Flying -M- (Frio 5000) | Victoria | 1 | 312 | 185K | Apr 2002 – Dec 2005 |
| Shelton, N. G-2-192648 | Cummins & Walker Oil Co., Inc. | Refugio-Fox (5200) | Refugio | 1 | 272 | 216K | Dec 2002 – Jul 2004 |
| Welder-Cliburn G-2-186840 | Cummins & Walker Oil Co., Inc. | Kathryn W. Allen (5140 Frio) | Victoria | 1 | 250 | 233K | Oct 2001 – Sep 2003 |
| DHB G-2-245944 | Cummins & Walker Oil Co., Inc. | McFaddin, NW. (4510) | Victoria | 1 | 191 | 133K | Jul 2008 – Mar 2013 |
| Norfleet, A. V. G-4-165058 | Cummins & Walker Oil Co., Inc. | Big Cowboy (Wilcox 6000) | Webb | 1 | 152 | 19.6K | Sep 1997 – Jan 1999 |
| Welder, E.H. 'E' G-4-215047 | Cummins & Walker Oil Co., Inc. | Plymouth (I-25) | San Patricio | 1 | 142 | 6.19K | Oct 2005 – Oct 2006 |
| O'Connor, M V Est G-2-193246 | Cummins & Walker Oil Co., Inc. | Hynes Ranch (5300) | Refugio | 1 | 141 | 295K | Feb 2003 – Mar 2005 |
| Jowers, F. G-2-179376 | Cummins & Walker Oil Co., Inc. | Agnes Barber S. (Frio 5250) | Refugio | 1 | 119 | 114K | Aug 2000 – Nov 2001 |
| Fox, W. J. G-2-180672 | Cummins & Walker Oil Co., Inc. | Refugio-Fox (3940) | Refugio | 1 | 93 | 60.9K | Aug 2000 – Jul 2001 |
| Welder, M. S. Est. G-2-183672 | Cummins & Walker Oil Co., Inc. | Kathryn W. Allen (4200 Frio) | Victoria | 1 | 87 | 280K | May 2001 – Feb 2004 |
| O'Brien-Harkins G-2-222635 | Cummins & Walker Oil Co., Inc. | Refugio-Fox (1600) | Refugio | 1 | 82 | 52.6K | Sep 2006 – Jun 2010 |
| O'Brien-Harkins G-2-197271 | Cummins & Walker Oil Co., Inc. | Refugio-Fox (5000) | Refugio | 1 | 73 | 100K | Jul 2003 – Oct 2007 |
| Cliburn-Welder G-2-193798 | Cummins & Walker Oil Co., Inc. | Marcado Creek, E. (4750, Upper) | Victoria | 1 | 46 | 84.6K | Feb 2003 – Dec 2003 |
| Welder, M S Est G-2-192703 | Cummins & Walker Oil Co., Inc. | Patricia (2800 Catahoula) | Victoria | 1 | 22 | 155K | Jan 2003 – Jan 2006 |
| Shelton, N. G-2-192500 | Cummins & Walker Oil Co., Inc. | Hynes Ranch (F- 4) | Refugio | 1 | 20 | 170K | Nov 2002 – Nov 2005 |
| O'Connor, M. V Est G-2-204867 | Cummins & Walker Oil Co., Inc. | Refugio-Fox (6700) | Refugio | 1 | 10 | 58K | Feb 2004 – Mar 2007 |
| DHB G-2-219348 | Cummins & Walker Oil Co., Inc. | McFaddin, NW. (6050) | Victoria | 1 | 6 | 869K | Jan 2006 – Apr 2013 |
| Fox, W. J. G-2-179365 | Cummins & Walker Oil Co., Inc. | Refugio-Fox (6500) | Refugio | 1 | 3 | 9.37K | Apr 2000 – Jul 2000 |
| Welder Unit G-2-188167 | Cummins & Walker Oil Co., Inc. | Marcado Creek, E. (4750) | Victoria | 1 | 2 | 302K | Jan 2002 – May 2006 |
| Wood, J.L. et Al G-2-139305 | Cummins & Walker Oil Co., Inc. | Woodsboro (3100) | Refugio | 1 | 1 | 495K | Jan 1993 – Sep 1998 |
| Welder, Minnie S. Est. G-2-226305 | Cummins & Walker Oil Co., Inc. | Marcado Creek (4675) | Victoria | 1 | 0 | 29.7K | Nov 2006 – Dec 2007 |
| Garza, D. L. "A" G-4-11306 | Cummins & Walker Oil Co., Inc. | Lockhart (4000) | Starr | 1 | 0 | 0 | — |
| Williams, R. S. G-2-79951 | Cummins & Walker Oil Co., Inc. | Williams (Frio 5400) | Victoria | 1 | 0 | 0 | — |
| Stks Unit G-4-257965 | Cummins & Walker Oil Co., Inc. | Knolle (3980 Frio) | Nueces | 1 | 0 | 0 | — |
| Williams, R. S. G-2-82351 | Cummins & Walker Oil Co., Inc. | Anaqua (3000) | Victoria | 1 | 0 | 0 | — |
| McCan, C. K. -B- G-2-123028 | Cummins & Walker Oil Co., Inc. | Welder Ranch (2950) | Victoria | 1 | 0 | 0 | — |
| Smajstrla Unit G-2-129692 | Cummins & Walker Oil Co., Inc. | Welder Ranch (2950) | Victoria | 1 | 0 | 1.14K | Jan 1993 – Aug 1993 |
| Samjstrla Unit G-2-132976 | Cummins & Walker Oil Co., Inc. | Welder Ranch (2100) | Victoria | 1 | 0 | 7.98K | Jan 1993 – Dec 1993 |
| Holzmark G-2-134990 | Cummins & Walker Oil Co., Inc. | Holzmark | Bee | 1 | 0 | 2.18K | May 1993 – Jan 1996 |
| Urban, J.L. G-2-135007 | Cummins & Walker Oil Co., Inc. | Weesatche, South ( Luling) | Goliad | 1 | 0 | 0 | — |
| Welder Estate G-2-135008 | Cummins & Walker Oil Co., Inc. | Welder Ranch (2125) | Victoria | 1 | 0 | 0 | — |
| Welder Estate G-2-136120 | Cummins & Walker Oil Co., Inc. | Welder Ranch (2100) | Victoria | 1 | 0 | 0 | — |
| Welder Estate G-2-136122 | Cummins & Walker Oil Co., Inc. | Welder Ranch (2125) | Victoria | 1 | 0 | 0 | — |