WELL · 42-441-32101 · DISTRICT 7
Thornton 57 A #1
Taylor County · Potosi (Cook Sand) field · Vertical
Thornton 57 A #1 (API 42-441-32101) is a plugged well in Taylor County, plugged October 13, 2014, last operated by Robertson Resources Inc..
The RRC has issued one drilling permit, issued January 25, 1982, permitted to 2,000 ft.
It was permitted by Chalmers Operating CO., Inc. and has since transferred to Robertson Resources Inc. on the wellbore schedule.
Its 2 leases have reported 11.7K barrels of oil and 25 mcf of gas since January 1993, last reporting in July 2026. The leases carry 3 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Chalmers Operating Co., Inc.; the EWA schedule now lists a different operator.
- Based in
- Horseshoe Bay, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- Feb 26, 2026
- Permits on file
- 32
- Phone
- (432) 688-5106
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Robertson Resources Inc. |
| Production reports | Quantum Investmentsthrough Oct 2009 |
| Latest permit | Chalmers Operating Co., Inc.Jan 25, 1982 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 2,000
- total depth, ft
- 1
- permits on file
- Jan 25, 1982
- last permit issued
- Jan 29, 1982
- completed
- 11.7K
- cumulative oil, bbl
- 25
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jan 29, 1982
- Shut in
- —
- Plugged
- Oct 13, 2014
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 3 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Thornton, E. L. O-8-18046 | Potosi (Cook Sand) | Quantum Investments | 2 | 2.18K | 21 | Jan 1993 – Jul 2026 |
| Thornton O-8-27211 | Potosi (Cook Sand) | Quantum Investments | 1 | 9.57K | 4 | Jun 1994 – 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.
- 1Robertson Resources, Inc.Jan 1993 → Jul 1993
- 2Gray Oil & Gas Inc.Aug 1993 → Oct 2008
- 3Quantum InvestmentsOct 2009 → Oct 2009
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 148428-99 | Drill | Chalmers Operating Co., Inc. | Jan 25, 1982 | Jan 25, 1982 | — | 2,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-8-18046 | — | — | — | — |
| — | — O-8-27211 | — | — | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 1,922 | 1,923 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 100 | 11 | 85 S |
| 2.375 | 1,910 | — | — |
| 4.5 | 1,980 | 7.875 | 230 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 | Jul 13, 1994 | — | — |
| 00 | Jun 13, 1989 | — | — |
| 00 | Jan 12, 1984 | Feb 1, 1982 | Yes |
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 42-441-32101 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-441-32101 → 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/44132101, documented in the API reference.