| 804695 | Apr 1, 2015 | Apr 1, 2015 | Springfield Oil Services, Inc. | Hockley | Ropes Canyon Reef Unit #302 | 3,000 | 21936396 |
| 737410 | Apr 28, 2012 | Apr 28, 2012 | Springfield Oil Services, Inc. | Hockley | Ropes Canyon Reef Unit #2201W | 9,625 | 21900807 |
| 736325 | Apr 16, 2012 | Apr 16, 2012 | Springfield Oil Services, Inc. | Hockley | Ropes Canyon Reef Unit #1103 | 9,570 | 21900868 |
| 734924 | Mar 10, 2012 | Mar 10, 2012 | Springfield Oil Services, Inc. | Hockley | Ropes Canyon Reef Unit #1102 | 9,450 | 21900867 |
| 723046 | Aug 31, 2011 | Aug 31, 2011 | Springfield Oil Services, Inc. | Hockley | Ropes Canyon Reef Unit #1101 | 9,370 | 21900866 |
| 699787 | Oct 21, 2010 | Oct 21, 2010 | Springfield Oil Services, Inc. | Hockley | Ropes Canyon Reef Unit #101 | 9,385 | 21900745 |
| 689110 | Feb 19, 2010 | Feb 19, 2010 | Springfield Oil Services, Inc. | Hockley | Ropes Canyon Reef Unit #803 | 9,372 | 21901484 |
| 689106 | Feb 8, 2010 | Feb 8, 2010 | Springfield Oil Services, Inc. | Hockley | Ropes Canyon Reef Unit #105 | 9,436 | 21900750 |
| 689112 | Jan 21, 2010 | Jan 21, 2010 | Springfield Oil Services, Inc. | Hockley | Ropes Canyon Reef Unit #106 | 9,376 | 21900751 |
| 689108 | Jan 21, 2010 | Jan 21, 2010 | Springfield Oil Services, Inc. | Hockley | Ropes Canyon Reef Unit #108 | 9,517 | 21900753 |
| 683548 | Aug 19, 2009 | Aug 19, 2009 | Springfield Oil Services, Inc. | Hockley | Ropes Canyon Reef Unit #401 | 9,410 | 21900944 |
| 679670 | Mar 30, 2009 | Mar 30, 2009 | Springfield Oil Services, Inc. | Hockley | Ropes Canyon Reef Unit #1010 D | 12,000 | 21931049 |
| 674175 | Dec 5, 2008 | Dec 5, 2008 | Springfield Oil Services, Inc. | Hockley | Ropes Canyon Reef Unit #601 D | 11,500 | 21936165 |
| 626923 | Oct 25, 2006 | Oct 25, 2006 | Springfield Oil Services, Inc. | Archer | Williamson "B" #2 | 6,200 | 00941614 |
| 626922 | Oct 23, 2006 | Oct 23, 2006 | Springfield Oil Services, Inc. | Archer | Williamson "A" #1 | 6,200 | 00941613 |
| 626922Amendment | Oct 23, 2006 | Oct 23, 2006 | Springfield Oil Services, Inc. | Archer | Climax #801 | 6,200 | 00941613 |
| 621096 | Jun 19, 2006 | Jun 19, 2006 | Springfield Oil Services, Inc. | Hockley | Smallwood, J. L. #4 | 5,000 | 21936925 |
| 621094 | Jun 16, 2006 | Jun 16, 2006 | Springfield Oil Services, Inc. | Hockley | Smallwood, J.L. #3 | 5,000 | 21936924 |
| 534251 | Jul 16, 2003 | Jul 16, 2003 | Springfield Oil Services Inc. | Hockley | Armes 16 #1L | 7,000 | 21936675 |
| 524448 | Oct 9, 2002 | Oct 9, 2002 | Springfield Oil Services Inc. | Hockley | Armes 16 #1L | 8,000 | 21936675 |
| 513726 | Sep 19, 2001 | Sep 19, 2001 | Springfield Oil Services Inc. | Hockley | Armes, J. E. #109 | 7,700 | 21910392 |
| 500075 | Sep 26, 2000 | Sep 26, 2000 | Springfield Oil Services Inc. | Hockley | Armes, W. T. Etal #2001A | 8,000 | 21900746 |
| 492209 | Feb 12, 2000 | Feb 12, 2000 | Springfield Oil Services Inc. | Hockley | Underwood #405A | 7,000 | 21931107 |
| 486620 | Aug 12, 1999 | Aug 12, 1999 | Springfield Oil Services Inc. | Hockley | Armes, J. E. "B" #2002A | 7,975 | 21910414 |
| 486619 | Aug 12, 1999 | Aug 12, 1999 | Springfield Oil Services Inc. | Hockley | Ropes Canyon Reef Unit #2002 | 9,384 | 21910414 |
| 481832 | Dec 29, 1998 | Dec 29, 1998 | Springfield Oil Services Inc. | Archer | Williamson "B" #2 | 6,200 | 00941219 |
| 481831 | Dec 29, 1998 | Dec 29, 1998 | Springfield Oil Services Inc. | Archer | Williamson "A" #1 | 6,200 | 00941220 |
| 479682 | Sep 24, 1998 | Sep 24, 1998 | Springfield Oil Services Inc. | Hockley | Conatser, C. J. #903A | 7,800 | 21910466 |
| 471695 | Dec 29, 1997 | Dec 29, 1997 | Springfield Oil Services Inc. | Archer | Climax #7S | 3,750 | 00941180 |
| 471694 | Dec 29, 1997 | Dec 29, 1997 | Springfield Oil Services Inc. | Archer | Climax #6S | 3,750 | 00941178 |
| 471693 | Dec 29, 1997 | Dec 29, 1997 | Springfield Oil Services Inc. | Archer | Climax #4S | 3,750 | 00941179 |
| 471564 | Dec 22, 1997 | Dec 22, 1997 | Springfield Oil Services Inc. | Archer | Climax #5S | 3,750 | 00941177 |
| 471563 | Dec 22, 1997 | Dec 22, 1997 | Springfield Oil Services Inc. | Archer | Climax #8S | 3,750 | 00941176 |
| 471562 | Dec 22, 1997 | Dec 22, 1997 | Springfield Oil Services Inc. | Hockley | Conatser, C. J. #1001AH | 8,000 | 21901474 |
| 471560 | Dec 22, 1997 | Dec 22, 1997 | Springfield Oil Services Inc. | Archer | Climax #2S | 3,750 | 00941175 |
| 471541 | Dec 22, 1997 | Dec 22, 1997 | Springfield Oil Services Inc. | Hockley | Sullivan #1HH | 8,000 | 21936399 |
| 471540 | Dec 22, 1997 | Dec 22, 1997 | Springfield Oil Services Inc. | Hockley | Schoepf #1HH | 8,000 | 21936400 |
| 471069 | Dec 10, 1997 | Dec 10, 1997 | Springfield Oil Services Inc. | Hockley | Ropes Canyon Reef Unit #302 | 11,500 | 21936396 |
| 471068 | Dec 10, 1997 | Dec 10, 1997 | Springfield Oil Services Inc. | Hockley | Ropes Canyon Reef Unit #2502 | 11,500 | 21936395 |
| 471067 | Dec 10, 1997 | Dec 10, 1997 | Springfield Oil Services Inc. | Hockley | Ropes Canyon Reef Unit #504 | 11,500 | 21936394 |
| 470352 | Nov 20, 1997 | Nov 20, 1997 | Springfield Oil Services Inc. | Hockley | Harper, J. C. #1301D | 11,500 | 21901480 |
| 467364 | Sep 9, 1997 | Sep 9, 1997 | Springfield Oil Services Inc. | Scurry | Criswell Estate #501 | 2,000 | 41533621 |
| 465658 | Jul 30, 1997 | Jul 30, 1997 | Springfield Oil Services Inc. | Hockley | Schoepf, E. T. #805AH | 8,000 | 21931051 |
| 463124 | Jun 30, 1997 | Jun 30, 1997 | Springfield Oil Services Inc. | Hockley | Underwood #405 A | 8,000 | 21931107 |
| 463883 | Jun 24, 1997 | Jun 24, 1997 | Springfield Oil Services Inc. | Hockley | Harper, J. C. #1302A | 8,000 | 21901481 |
| 456868 | Dec 30, 1996 | Dec 30, 1996 | Springfield Oil Services Inc. | Hockley | Owen, J. E. #2401A | 8,000 | 21901289 |
| 456744 | Dec 27, 1996 | Dec 27, 1996 | Springfield Oil Services Inc. | Hockley | Harper, J.C. #1303 | 11,500 | 21936311 |
| 456743 | Dec 27, 1996 | Dec 27, 1996 | Springfield Oil Services Inc. | Hockley | Newsome, L.D. #504 | 11,500 | 21936312 |
| 456741 | Dec 27, 1996 | Dec 27, 1996 | Springfield Oil Services Inc. | Hockley | Arnes, W. T. Etal #2001A | 8,000 | 21900746 |
| 456739 | Dec 27, 1996 | Dec 27, 1996 | Springfield Oil Services Inc. | Hockley | Matthews, T. H. #1104 | 11,500 | 21936313 |
| 456353 | Dec 16, 1996 | Dec 16, 1996 | Springfield Oil Services Inc. | Clay | Spikes #3A | 9,000 | 07734724 |
| 456353Amendment | Dec 16, 1996 | Dec 16, 1996 | Springfield Oil Services Inc. | Clay | Spikes #3A | 9,000 | 07734724 |
| 456353Amendment | Dec 16, 1996 | Dec 16, 1996 | Springfield Oil Services Inc. | Clay | Spikes #3A | 9,000 | 07734724 |
| 453951 | Nov 12, 1996 | Nov 12, 1996 | Springfield Oil Services Inc. | Hockley | Ropes Canyon Reef Unit #1012 | 10,000 | 21936295 |
| 453951Amendment | Nov 12, 1996 | Nov 12, 1996 | Springfield Oil Services Inc. | Hockley | Armes #1012 | 11,500 | 21936295 |
| 454430 | Oct 28, 1996 | Oct 28, 1996 | Springfield Oil Services Inc. | Hockley | Ropes Canyon Reef Unit #405A | 10,000 | 21931107 |
| 454429 | Oct 28, 1996 | Oct 28, 1996 | Springfield Oil Services Inc. | Hockley | Ropes Canyon Reef Unit #502 | 10,000 | 21900680 |
| 453548 | Oct 9, 1996 | Oct 9, 1996 | Springfield Oil Services Inc. | Hockley | Underwood #401A | 7,750 | 21900944 |
| 453369 | Oct 2, 1996 | Oct 2, 1996 | Springfield Oil Services Inc. | Hockley | Schoepf, E.T. #803A | 7,700 | 21901484 |
| 445058 | Feb 23, 1996 | Feb 23, 1996 | Springfield Oil Services Inc. | Hockley | Conatser, C. J. #901A | 7,725 | 21900758 |
| 443290 | Dec 28, 1995 | Dec 28, 1995 | Springfield Oil Services Inc. | Archer | Climax #3S | 3,750 | 00941005 |
| 443289 | Dec 28, 1995 | Dec 28, 1995 | Springfield Oil Services Inc. | Archer | Climax #2S | 3,750 | 00941175 |
| 443288 | Dec 28, 1995 | Dec 28, 1995 | Springfield Oil Services Inc. | Archer | Climax #1S | 3,750 | 00941004 |
| 443287 | Dec 28, 1995 | Dec 28, 1995 | Springfield Oil Services Inc. | Hockley | Sullivan #S 1 | 10,200 | 21936399 |
| 443286 | Dec 28, 1995 | Dec 28, 1995 | Springfield Oil Services Inc. | Archer | Climax #8S | 3,750 | 00941176 |
| 443285 | Dec 28, 1995 | Dec 28, 1995 | Springfield Oil Services Inc. | Archer | Climax #7S | 3,750 | 00941180 |
| 443284 | Dec 28, 1995 | Dec 28, 1995 | Springfield Oil Services Inc. | Archer | Climax #6S | 3,750 | 00941178 |
| 443283 | Dec 28, 1995 | Dec 28, 1995 | Springfield Oil Services Inc. | Archer | Climax #5S | 3,750 | 00941177 |
| 443282 | Dec 28, 1995 | Dec 28, 1995 | Springfield Oil Services Inc. | Archer | Climax #4S | 3,750 | 00941179 |
| 443250 | Dec 28, 1995 | Dec 28, 1995 | Springfield Oil Services Inc. | Hockley | Armes "A" #S 1 | 10,200 | 21936199 |
| 443249 | Dec 28, 1995 | Dec 28, 1995 | Springfield Oil Services Inc. | Hockley | Schoepf #S 1 | 10,200 | 21936197 |
| 443248 | Dec 28, 1995 | Dec 28, 1995 | Springfield Oil Services Inc. | Hockley | Schoepf "A" #S 1 | 10,200 | 21936400 |
| 443233 | Dec 28, 1995 | Dec 28, 1995 | Springfield Oil Services Inc. | Hockley | Armes #S 1 | 10,200 | 21936198 |
| 438159 | Jul 25, 1995 | Jul 25, 1995 | Springfield Oil Services Inc. | Hockley | Conatser, C.J. #1001A | 7,700 | 21901474 |
| 438159Amendment | Jul 25, 1995 | Jul 25, 1995 | Springfield Oil Services Inc. | Hockley | Conatser, C.J. #1001AH | 8,000 | 21901474 |
| 438159Amendment | Jul 25, 1995 | Jul 25, 1995 | Springfield Oil Services Inc. | Hockley | Conatser, C.J. -B- #1001A | 7,860 | 21901474 |
| 437924 | Jul 18, 1995 | Jul 18, 1995 | Springfield Oil Services Inc. | Hockley | Owen, J.E. #2501A | 7,700 | 21900876 |
| 435823 | May 12, 1995 | May 12, 1995 | Springfield Oil Services Inc. | Hockley | Ropes (Canyon Reef) Unit #601A | 10,000 | 21936165 |
| 435823Amendment | May 12, 1995 | May 12, 1995 | Springfield Oil Services Inc. | Hockley | Lamberth #601A | 11,500 | 21936165 |
| 434985 | Apr 18, 1995 | Apr 18, 1995 | Springfield Oil Services Inc. | Hockley | Matthews, T.H. #1102A | 7,600 | 21900867 |
| 411708Amendment | May 24, 1993 | May 24, 1993 | Springfield Oil Services Inc. | Hockley | Armes, J. E. #106A | 7,700 | 21900751 |
| 407646 | Dec 23, 1992 | Dec 23, 1992 | Springfield Oil Services Inc. | Clay | Spikes, Emma #3A | 6,700 | 07734542 |
| 293889 | Dec 31, 1985 | Dec 31, 1985 | Springfield Oil Services Inc. | Wilbarger | Waggoner, W. T. Est. "C" #3 | 2,500 | 48731993 |
| 293890 | Dec 31, 1985 | Dec 31, 1985 | Springfield Oil Services Inc. | Wilbarger | Waggoner, W. T. Est. "C" #4 | 2,500 | 48731994 |
| 293887 | Dec 31, 1985 | Dec 31, 1985 | Springfield Oil Services Inc. | Wilbarger | Waggoner, W. T. Est. "C" #5 | 2,500 | 48731992 |
| 293783 | Dec 30, 1985 | Dec 30, 1985 | Springfield Oil Services Inc. | Wilbarger | Waggoner, W. T. Est. "D" #11 | 2,050 | 48731978 |
| 293782 | Dec 30, 1985 | Dec 30, 1985 | Springfield Oil Services Inc. | Wilbarger | Waggoner, W. T. Est. "D" #10 | 2,050 | 48731977 |
| 293784 | Dec 30, 1985 | Dec 30, 1985 | Springfield Oil Services Inc. | Wilbarger | Waggoner, W. T. Est. "C" #8 | 2,500 | 48731979 |
| 293789 | Dec 30, 1985 | Dec 30, 1985 | Springfield Oil Services Inc. | Wilbarger | Waggoner, W. T. Est. "C" #9 | 2,500 | 48731981 |
| 293799 | Dec 30, 1985 | Dec 30, 1985 | Springfield Oil Services Inc. | Wilbarger | Waggoner, W. T. Est. "E" #2 | 2,500 | 48731989 |
| 293797 | Dec 30, 1985 | Dec 30, 1985 | Springfield Oil Services Inc. | Wilbarger | Waggoner, W. T. Est. "E" #3 | 2,500 | 48731987 |
| 293798 | Dec 30, 1985 | Dec 30, 1985 | Springfield Oil Services Inc. | Wilbarger | Waggoner, W. T. Est. "E" #4 | 2,500 | 48731988 |
| 293796 | Dec 30, 1985 | Dec 30, 1985 | Springfield Oil Services Inc. | Wilbarger | Waggoner, W. T. Est. "E" #5 | 2,500 | 48731986 |
| 293794 | Dec 30, 1985 | Dec 30, 1985 | Springfield Oil Services Inc. | Wilbarger | Waggoner, W. T. Est. "E" #6 | 2,500 | 48731985 |
| 293800 | Dec 30, 1985 | Dec 30, 1985 | Springfield Oil Services Inc. | Wilbarger | Waggoner, W. T. Est. "D" #4 | 2,050 | 48731990 |
| 293777 | Dec 30, 1985 | Dec 30, 1985 | Springfield Oil Services Inc. | Wilbarger | Waggoner, W. T. Est. "D" #5 | 2,050 | 48731972 |
| 293778 | Dec 30, 1985 | Dec 30, 1985 | Springfield Oil Services Inc. | Wilbarger | Waggoner, W. T. Est. "D" #6 | 2,050 | 48731973 |
| 293779 | Dec 30, 1985 | Dec 30, 1985 | Springfield Oil Services Inc. | Wilbarger | Waggoner, W. T. Est. "D" #7 | 2,050 | 48731974 |
| 293780 | Dec 30, 1985 | Dec 30, 1985 | Springfield Oil Services Inc. | Wilbarger | Waggoner, W. T. Est. "D" #8 | 2,050 | 48731975 |
| 293781 | Dec 30, 1985 | Dec 30, 1985 | Springfield Oil Services Inc. | Wilbarger | Waggoner, W. T. Est. "D" #9 | 2,050 | 48731976 |