WELL · 42-135-35372 · DISTRICT 8
Cowden Ranch -7- #4
Ector County · Cowden (Cisco) field · Vertical
Cowden Ranch -7- #4 (API 42-135-35372) is a well in Ector County operated by Rust Oil Corp., completed February 19, 1987.
The RRC has issued one drilling permit (amended once), issued December 9, 1986, permitted to 9,000 ft.
Completion filings report 2 formation tops, including San Andres, Clear Fork.
Its 2 leases have reported 579K barrels of oil and 750K mcf of gas since January 1993, last reporting in July 2026. The leases carry 11 wells, so these are lease totals, not this well alone.
Operator of record
Fort Worth, TX · P-5 X, filed Nov 17, 2025 · 317 permits on file · (817) 732-9383
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Rust Oil Corp. |
| Production reports | Rust Oil Corp.through Apr 2026 |
| Latest permit | Rust Oil Corp.Dec 9, 1986 |
- 9,000
- total depth, ft
- 2
- permits on file
- Dec 9, 1986
- last permit issued
- Feb 19, 1987
- completed
- 579K
- cumulative oil, bbl
- 750K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Feb 19, 1987
- 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 2 leases this well is completed on; they carry 11 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Cowden Ranch -7- O-10-30181 | Cowden (Cisco) | Rust Oil Corp. | 8 | 398K | 542K | Jan 1993 – Jul 2026 |
| Cowden Ranch -7- O-10-32581 | Cowden (Penn Detrital) | Rust Oil Corp. | 3 | 182K | 208K | Jan 1993 – Jul 2026 |
Oil, barrels lease total
Last 12 months 2,817 · prior 12 3,470(-19%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Rust Oil Corp.Jan 1993 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 323948-98 | Field transfer | Rust Oil Corp. | Mar 26, 1990 | Dec 9, 1986 | — | 9,000 |
| 323948-99 | Drill | Rust Oil Corp. | Dec 5, 1986 | Dec 9, 1986 | — | 9,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-30181 | — | — | — | — |
| — | — O-10-32581 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,995 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| San Andres | 4,398 | -1,403 |
| Clear ForkCLEARFORK | 5,607 | -2,612 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,399 | 8,405 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 320 | 17 | 325 S |
| 8.625 | 3,705 | 12.25 | 1,200 S |
| 5.5 | 9,000 | 7.875 | 1,140 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 2, 1990 | Mar 2, 1987 | — |
| 00 | Apr 20, 1990 | — | — |
| 00 | Apr 6, 1987 | Mar 20, 1987 | Yes |
| 00 | Apr 2, 1987 | — | — |
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 42-135-35372 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-135-35372 → 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/13535372, documented in the API reference.