WELL · 42-353-01140 · DISTRICT 7
Cox E. S. #1
Nolan County · Lake Trammel (Strawn Reef) field · Vertical
Cox E. S. #1 (API 42-353-01140) is a plugged well in Nolan County, plugged January 26, 2012, last operated by Grayrock Energy II LLC.
The RRC has issued one drilling permit, issued June 18, 1992, permitted to 6,950 ft.
It was permitted by Eldorado Oil And Gas, Inc. and has since transferred to Grayrock Energy II LLC on the wellbore schedule.
Completion filings report 6 formation tops, including Palo Pinto, Upper Capps, Strawn, Caddo.
Its 2 leases have reported 3.12K barrels of oil and 1.32K mcf of gas since January 1993, last reporting in July 2026. The leases carry 5 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Eldorado Oil and Gas, Inc.; the EWA schedule now lists a different operator.
Fort Worth, TX · P-5 Y, filed Aug 4, 2025 · (214) 234-9115
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Grayrock Energy II LLC |
| Production reports | Brothers Operating Company Inc.through Aug 2001 |
| Latest permit | Eldorado Oil and Gas, Inc.Jun 18, 1992 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 6,950
- total depth, ft
- 1
- permits on file
- Jun 18, 1992
- last permit issued
- Jun 30, 1992
- completed
- 3.12K
- cumulative oil, bbl
- 1.32K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jun 30, 1992
- Shut in
- —
- Plugged
- Jan 26, 2012
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, Evelyn S. O-8-2960 | Lake Trammel (Ellenburger) | Brothers Operating Company Inc. | 2 | 0 | 0 | Jan 1993 – Jul 2026 |
| Cox, E. S. O-8-2972 | Lake Trammel (Strawn Reef) | Grayrock Energy II, LLC | 3 | 3.12K | 1.32K | Jan 1993 – Jul 2026 |
No volumes reported on these leases in the last three years.
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Eldorado Operating Co.Jan 1993 → Feb 1995
- 2Brothers Operating Company Inc.Mar 2001 → Aug 2001
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 400175-99 | Recompletion | Eldorado Oil and Gas, Inc. | Jun 15, 1992 | Jun 18, 1992 | Jun 23, 1992 | 6,950 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-8-2960 | — | — | — | — |
| — | — O-8-2972 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,515 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Palo Pinto | 5,885 | -3,370 |
| Upper Capps | 6,350 | -3,835 |
| StrawnSTRAWN REEF | 6,428 | -3,913 |
| Caddo | 6,893 | -4,378 |
| Mississippian | 6,952 | -4,437 |
| Ellenburger | 6,970 | -4,455 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,428 | 6,448 | Perforated |
| — | 6,970 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 429 | 11 | 375 S |
| 5.5 | 6,975 | 8.75 | 550 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 7, 1992 | Jul 3, 1992 | Yes |
| 00 | Jul 16, 1992 | — | — |
| 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 42-353-01140 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-353-01140 → scanned completion filings
Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward). 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/35301140, documented in the API reference.