WELL · 42-003-05241 · DISTRICT 8
Lockhart #4
Andrews County · Martin (Second Simpson Sd.) field · Producing · Vertical
Lockhart #4 (API 42-003-05241) is a well in Andrews County operated by Winn Operating LLC, completed December 5, 1986 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued September 12, 1986, permitted to 8,857 ft.
It was permitted by Shell Western E&P Inc. and has since transferred to Winn Operating LLC on the wellbore schedule.
Completion filings report 3 formation tops, including McKee, Simpson, Ellenburger.
Its 2 leases have reported 352K barrels of oil and 89.9K mcf of gas since January 1993, last reporting in July 2026. The leases carry 4 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Shell Western E&P Inc.; the EWA schedule now lists a different operator.
- Based in
- Kilgore, TX
- P-5 status
- Active (A)
- P-5 last filed
- Jan 23, 2026
- Permits on file
- 1
- Phone
- (903) 984-3443
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Winn Operating LLC |
| Production reports | Winn Operating, LLCthrough Apr 2026 |
| Latest permit | Shell Western E&P Inc.Sep 12, 1986 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 8,857
- total depth, ft
- 1
- permits on file
- Sep 12, 1986
- last permit issued
- Dec 5, 1986
- completed
- 352K
- cumulative oil, bbl
- 89.9K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Dec 5, 1986
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active (A)
Surface location
No coordinates on the permit record yet. The RRC's GIS record usually lands within days of issuance; historical master-file permits never carry one.
Lease production
PDQ LEASE REPORTS · REPORTED THROUGH APR 2026
Texas reports oil by lease, not by well. These are the 2 leases this well is completed on; they carry 4 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Lockhart O-10-4077 | Martin (Ellenburger) | Winn Operating, LLC | 3 | 0 | 0 | Jan 1993 – Jul 2026 |
| Lockhart O-10-31036 | Martin (Second Simpson Sd.) | Winn Operating, LLC | 1 | 352K | 89.9K | Jan 1993 – Jul 2026 |
Oil, barrels lease total
Last 12 months 9,861 · prior 12 9,197(+7%)
Gas, mcf lease total
Last 12 months 1,349 · prior 12 2,432(-45%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Cross Timbers Operating CompanyJan 1993 → May 2000
- 2Huntington Energy, L.L.C.Jun 2000 → Nov 2012
- 3Saber Oil & Gas Ventures, LLCDec 2012 → Feb 2018
- 4Mammoth Exploration LLCMar 2018 → May 2022
- 5Winn Operating, LLCJun 2022 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 320244-99 | Recompletion | Shell Western E&P Inc. | Sep 8, 1986 | Sep 12, 1986 | — | 8,857 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-4077 | — | — | — | — |
| — | — O-10-31036 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 3,293 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| McKee | 8,103 | -4,810 |
| SimpsonSECOND SIMPSON SAND | 8,335 | -5,042 |
| Ellenburger | 8,474 | -5,181 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,344 | 8,430 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 284 | 17.5 | 400 S |
| 8.625 | 3,744 | 12.25 | 3,600 S |
| 5.5 | 8,475 | 7.875 | 100 S |
Completion filings
W-2 and G-1 reports on record in the RRC wellbore file, newest first. The suffix identifies the wellbore or completion event. About these reports →
| Suffix | Filed | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Feb 6, 1987 | Jan 22, 1987 | Yes |
| 00 | Jan 30, 1987 | — | — |
| 00 | Jan 12, 1984 | — | — |
The source documents
Petrora holds the structured record. The scanned filings live at the RRC; these links open its search already filled in for this API.
- Wellbore filings for 42-003-05241 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-003-05241 → scanned completion filings
Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward) and the University Lands library. then paste it into their search.
About this data
Permits from the RRC OGA049M master and daily daf420 files; wellbore and operator of record from the EWA schedule, weekly; completions, formation tops, casing, and perforations from the dbf900 wellbore file; production from PDQ lease reports, which lag two to three months; injection from UIC permits, H-10 reports, and TexNet daily volumes; earthquakes from the TexNet catalog.
New to these records? How to read a well page · API numbers · completion reports and tops · why production is by lease
Developers: this page as JSON is GET /v1/data/wells/00305241, documented in the API reference.