WELL · 42-317-34240 · DISTRICT 8
Cox '12' #1
Martin County · Vertical
Cox '12' #1 (API 42-317-34240) is a permitted well in Martin County filed by Endeavor Energy Resources L.P.; no completion report is on file yet.
The RRC has issued 4 drilling permits (amended once) between 1999 and 2017, permitted to 11,075 ft.
Completion filings report 5 formation tops, including Spraberry, Dean, Wolfcamp, Strawn.
Its 3 leases have reported 250K barrels of oil and 474K mcf of gas since January 2000, last reporting in July 2026. The leases carry 9 wells, so these are lease totals, not this well alone.
Operator of record
Endeavor Energy Resources L.P.
Midland, TX · P-5 Y, filed Apr 4, 2026 · 6,190 permits on file · (855) 247-5920
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | none |
| Production reports | Diamondback E&P LLCthrough Apr 2026 |
| Latest permit | Endeavor Energy Resources L.P.Apr 26, 2017 |
- 11,075
- total depth, ft
- 5
- permits on file
- Apr 26, 2017
- last permit issued
- —
- completed
- 250K
- cumulative oil, bbl
- 474K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 2000 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- —
- Shut in
- —
- Plugged
- —
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 3 leases this well is completed on; they carry 9 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Cox "12A" O-10-41447 | Spraberry (Trend Area) | Diamondback E&P LLC | 7 | 250K | 474K | Jan 2000 – Jul 2026 |
| Cox "12" O-10-36215 | RK (Strawn) | Endeavor Energy Resources L.P. | 1 | 0 | 0 | Jan 2000 – Aug 2017 |
| Cox '12' O-10-48411 | Mon Bak (Strawn) | Endeavor Energy Resources L.P. | 1 | 0 | 0 | Apr 2015 – May 2017 |
Oil, barrels lease total
Last 12 months 1,483 · prior 12 2,210(-33%)
Gas, mcf lease total
Last 12 months 5,462 · prior 12 2,341(+133%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Endeavor Energy Resources L.P.Jan 2000 → Dec 2024
- 2Diamondback E&P LLCMar 2025 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 825660-99 | Field transfer | Endeavor Energy Resources L.P. | Apr 19, 2017 | Apr 26, 2017 | Oct 20, 1999 | 11,075 |
| 822681-98 | Recompletion | Endeavor Energy Resources L.P. | Mar 9, 2017 | Feb 7, 2017 | Oct 20, 1999 | 11,075 |
| 822681-99 | Recompletion | Endeavor Energy Resources L.P. | Jan 31, 2017 | Feb 7, 2017 | — | 11,075 |
| 493986-99 | Reclass | Stephens, Autry C. | Apr 11, 2000 | May 17, 2000 | — | 11,000 |
| 488608-99 | Drill | Stephens, Autry C. | Oct 18, 1999 | Oct 18, 1999 | Oct 20, 1999 | 11,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-36215 | — | — | — | — |
| — | — O-10-41447 | — | — | — | — |
| — | — O-10-48411 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,847 | 11,015 | Perforated |
| 10,802 | 11,015 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 12.75 | 360 | 17.5 | 340 S |
| 8.625 | 5,050 | 11 | 425 S |
| 4.5 | 11,075 | 7.875 | 1,270 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 | May 4, 2017 | Mar 24, 2017 | — |
| 00 | May 3, 2017 | May 1, 2017 | Yes |
| 00 | Apr 10, 2000 | Feb 3, 2000 | Yes |
| 00 | Mar 16, 2000 | — | — |
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 42-317-34240 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-317-34240 → 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/31734240, documented in the API reference.