WELL · 42-317-34246 · DISTRICT 8
Cox 9 #1
Martin County · Tarzan (Dean-Wolfcamp) field · Vertical
Cox 9 #1 (API 42-317-34246) is a plugged well in Martin County, plugged November 3, 2022, last operated by Endeavor Energy Resources L.P..
The RRC has issued 2 drilling permits between 1999 and 2000, permitted to 11,000 ft.
It was permitted by Stephens, Autry C. and has since transferred to Endeavor Energy Resources L.P. on the wellbore schedule.
Completion filings report 4 formation tops, including Spraberry, Dean, Wolfcamp, Strawn.
Its 2 leases have reported 237K barrels of oil and 329K mcf of gas since March 2000, last reporting in July 2026. The leases carry 5 wells, so these are lease totals, not this well alone.
Operator of record
Endeavor Energy Resources L.P.
Permitted by Stephens, Autry C.; the EWA schedule now lists a different operator.
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 | Endeavor Energy Resources L.P. |
| Production reports | Diamondback E&P LLCthrough Jan 2025 |
| Latest permit | Stephens, Autry C.Jun 9, 2000 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 11,000
- total depth, ft
- 2
- permits on file
- Jun 9, 2000
- last permit issued
- Feb 27, 2000
- completed
- 237K
- cumulative oil, bbl
- 329K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Mar 2000 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Feb 27, 2000
- Shut in
- —
- Plugged
- Nov 3, 2022
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 5 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Cox "9" O-10-36430 | Spraberry (Trend Area) | Diamondback E&P LLC | 4 | 236K | 329K | Apr 2000 – Jul 2026 |
| Cox "9" O-10-36269 | Tarzan (Dean-Wolfcamp) | Endeavor Energy Resources L.P. | 1 | 1K | 0 | Mar 2000 – Jul 2003 |
Oil, barrels lease total
Last 12 months 0 · prior 12 1,478(-100%)
Gas, mcf lease total
Last 12 months 0 · prior 12 2,381(-100%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Stephens, Autry C.Mar 2000 → Apr 2000
- 2Endeavor Energy Resources L.P.Apr 2000 → Dec 2024
- 3Diamondback E&P LLCJan 2025 → Jan 2025
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 516263-99 | Recompletion | Stephens, Autry C. | May 9, 2000 | Jun 9, 2000 | Jun 13, 2000 | 11,000 |
| 489805-99 | Drill | Stephens, Autry C. | Nov 23, 1999 | Nov 23, 1999 | Nov 30, 1999 | 11,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-36269 | — | — | — | — |
| — | — O-10-36430 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,839 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,860 | 9,974 | Perforated |
| 10,814 | 11,083 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 12.75 | 370 | 17.5 | 220 S |
| 8.625 | 5,080 | 11 | 425 S |
| 4.5 | 11,165 | 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 | Aug 14, 2003 | May 20, 2003 | Yes |
| 00 | Jul 28, 2003 | Apr 5, 2000 | Yes |
| 00 | May 4, 2000 | Apr 5, 2000 | Yes |
| 00 | Apr 27, 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 42-317-34246 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-317-34246 → 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/31734246, documented in the API reference.