| Young #1HHZ42-197-31771 | Echo Production Inc. only | HardemanReprieve (Chappel) | PluggedOil | 9,500 | Jul 18, 2019 | 1 | Mar 2020 |
| Sloan-Everett #142-429-36676 | Echo Production Inc. only | StephensCrystal Falls (Miss.) | PluggedOil | 5,000 | May 24, 2011 | 1 | Nov 2020 |
| Saunders #142-441-33893 | Echo Production Inc. only | TaylorAudas-Graham (Fry Sand) | PluggedOil | 4,650 | Oct 27, 1998 | 1 | — |
| U.L. 39-6 #242-105-38105 | Echo Production Inc. only | CrockettWildcat | PluggedOil | 1,800 | Mar 24, 1998 | 1 | — |
| Shoemate Unit #iu42-503-40366 | Echo Production Inc. only | YoungYoung County Regular | PluggedOil | 5,000 | May 4, 1995 | 3 | Jun 1996 |
| Rhoades #4B42-503-39306 | Echo Production Inc. only | YoungYoung County Regular | PluggedOil | 4,700 | Aug 16, 1994 | 3 | Jun 2001 |
| Kunkel Unit #142-009-40818 | Echo Production Inc. only | ArcherMegargel NE. (Miss) | PluggedOil | 5,200 | Dec 15, 1993 | 1 | Jun 1997 |
| Griffin Unit #142-009-40804 | Echo Production Inc. only | ArcherParkey (Miss.) | PluggedOil | 5,700 | Oct 12, 1993 | 1 | Jan 1994 |
| Jackson Trust #142-237-38026 | Echo Production Inc. only | JackBryson East | PluggedOil | 3,300 | Mar 9, 1993 | 1 | — |
| Schnelle #142-503-39386 | Echo Production Inc. only | YoungYoung County Regular (Gas) | PluggedGas | 4,999 | Feb 24, 1993 | 2 | Apr 1994 |
| Rhine #342-497-33766 | Echo Production Inc. only | WiseBoonsville (Bend Congl. Gas) | PluggedGas | 6,500 | Nov 4, 1992 | 1 | Mar 2004 |
| Shoemate #142-503-40330 | Echo Production Inc. only | YoungWiley West (Miss.) | PluggedOil | 4,999 | Jul 6, 1992 | 2 | Aug 2002 |
| Horn John #a 142-077-30142 | Echo Production Inc. only | ClayDougs West (Shannon Strawn Up.) | PluggedOil | 3,299 | Oct 23, 1991 | 1 | Jul 1994 |
| Sitta a #142-197-31180 | Echo Production Inc. only | HardemanThrash (Chappel) | PluggedOil | 9,000 | Jul 17, 1991 | 1 | Apr 2019 |
| Pcsl 29 #142-447-34781 | Echo Production Inc. only | ThrockmortonThrockmorton County Regular | PluggedOil | 4,950 | Jun 4, 1990 | 2 | Sep 1997 |
| Trammell #142-151-32224 | Echo Production Inc. only | FisherPardue (Canyon) | PluggedOil | 4,700 | Jun 28, 1989 | 1 | — |
| McNutt a #542-447-32848 | Echo Production Inc. only | ThrockmortonThrockmorton County Regular | PluggedOil | 5,000 | Jun 3, 1988 | 2 | May 1995 |
| Chandler E.T. #342-447-31138 | Echo Production Inc. only | ThrockmortonThrockmorton County Regular | PluggedOil | 4,850 | May 26, 1988 | 2 | Aug 1995 |
| Prideaux #442-009-39934 | Echo Production Inc. only | ArcherArcher County Regular | PluggedOil | 4,000 | Apr 15, 1988 | 1 | Mar 1994 |
| Hearne #142-503-39764 | Echo Production Inc. only | YoungYoung County Regular (Gas) | PluggedGas | 4,999 | Apr 12, 1988 | 1 | — |
| Prideaux #342-009-39923 | Echo Production Inc. only | ArcherArcher County Regular | PluggedOil | 4,000 | Apr 1, 1988 | 1 | Mar 1994 |
| Gardner-Simms #142-503-39747 | Echo Production Inc. only | YoungNewcastle NE. (Miss.) | PluggedOil | 4,999 | Mar 28, 1988 | 1 | — |
| Rock Orchard #142-503-39746 | Echo Production Inc. only | YoungBayex (Congl.) | PluggedGas | 4,999 | Mar 24, 1988 | 2 | — |
| Prideaux D #342-009-39910 | Echo Production Inc. only | ArcherArcher County Regular | PluggedOil | 2,990 | Mar 7, 1988 | 1 | Oct 2001 |
| Prideaux D #142-009-39874 | Echo Production Inc. only | ArcherArcher County Regular | PluggedOil | 2,999 | Dec 2, 1987 | 1 | Oct 2001 |
| Prideaux #242-009-39808 | Echo Production Inc. only | ArcherArcher County Regular | PluggedOil | 4,800 | Sep 4, 1987 | 2 | Mar 1994 |
| Prideaux C #242-009-39782 | Echo Production Inc. only | ArcherArcher County Regular | PluggedOil | 2,990 | Aug 6, 1987 | 1 | Nov 2001 |
| Horn John Unit #542-077-31007 | Echo Production Inc. only | ClayJames Henderson (Ellen) | PluggedOil | 6,300 | Jun 17, 1987 | 3 | Sep 1995 |
| Prideaux Unit #242-009-39738 | Echo Production Inc. only | ArcherArcher County Regular | PluggedOil | 2,990 | May 20, 1987 | 1 | May 1999 |
| Sun #142-503-39505 | Echo Production Inc. only | YoungWiley (Miss.) | PluggedOil | 4,999 | May 11, 1987 | 1 | Mar 1996 |
| Cochran #1A42-151-32112 | Echo Production Inc. only | FisherCamp Springs SE. (Strawn) | PluggedOil | 6,600 | Oct 17, 1986 | 1 | — |
| Owens #142-503-39348 | Echo Production Inc. only | YoungGooseneck (Miss.) | PluggedOil | 4,999 | Sep 30, 1986 | 2 | Dec 2007 |
| Cann #342-363-32379 | Echo Production Inc. only | Palo PintoMineral Wells South (Strawn UP) | PluggedGas | 5,000 | May 20, 1986 | 2 | Oct 2013 |
| Young K #542-197-30924 | Echo Production Inc. only | HardemanWalser (Miss) | PluggedOil | 8,100 | Jan 21, 1986 | 1 | Apr 2015 |
| Sartain #142-237-36742 | Echo Production Inc. only | JackSartain Draw (Bryson) | PluggedOil | 4,999 | Dec 13, 1985 | 2 | — |
| McNutt a #1A42-447-34489 | Echo Production Inc. only | ThrockmortonThrockmorton County Regular | PluggedOil | 4,800 | Oct 11, 1985 | 1 | May 1995 |
| Calvin-McClure #242-363-33642 | Echo Production Inc. only | Palo PintoBrazos River (Atoka D ) | PluggedGas | 4,400 | Sep 27, 1985 | 1 | May 2002 |
| Ramzy #142-237-36864 | Echo Production Inc. only | JackSartain Draw (Bryson) | PluggedOil | 4,999 | Jul 19, 1985 | 1 | — |
| Graham National Bank #242-503-38799 | Echo Production Inc. only | YoungYoung County Regular | PluggedOil | 4,999 | Jun 6, 1985 | 1 | — |
| Watson I.W. a #342-447-31192 | Echo Production Inc. only | ThrockmortonThrockmorton County Regular | PluggedOil | 4,860 | May 17, 1985 | 2 | Jun 1995 |
| Sartain #1 A42-237-36788 | Echo Production Inc. only | JackSartain Draw (Bryson) | PluggedOil | 2,900 | May 15, 1985 | 1 | — |
| Brown R.A. Unit #142-447-34205 | Echo Production Inc. only | ThrockmortonManning-Harrington (Caddo) | PluggedOil | 5,400 | Sep 21, 1984 | 1 | — |
| Young Barnett a #242-197-30736 | Echo Production Inc. only | HardemanWalser (Miss) | PluggedOil | 8,800 | Jul 23, 1984 | 1 | Aug 2004 |
| Rodgers #142-237-36130 | Echo Production Inc. only | JackDearing (Caddo) | PluggedOil | 5,300 | Jun 5, 1984 | 1 | — |
| Calvin-McClure Unit #142-363-33315 | Echo Production Inc. only | Palo PintoBrazos River (Atoka D ) | PluggedGas | 4,600 | May 8, 1984 | 1 | — |
| Bare #142-237-35998 | Echo Production Inc. only | JackKinder N. (Atoka Congl. Up.) | PluggedGas | 4,950 | Apr 20, 1984 | 1 | Dec 2010 |
| Car #342-363-33217 | Echo Production Inc. only | Palo PintoPalo Pinto Co. Reg. (Gas) | PluggedGas | 1,500 | Oct 26, 1983 | 1 | — |
| Marley #242-237-35358 | Echo Production Inc. only | JackPearl Mosley (Congl. Upper) | PluggedGas | 4,900 | Aug 4, 1983 | 1 | — |
| Moren #442-503-37211 | Echo Production Inc. only | YoungYoung County Regular (Gas) | PluggedGas | 2,900 | Jul 26, 1983 | 1 | — |
| Polk-Patton #342-237-34970 | Echo Production Inc. only | JackBoonsville (Bend Congl. Gas) | PluggedGas | 5,650 | Jan 27, 1983 | 1 | Aug 1996 |