WELL · 42-055-32271 · DISTRICT 1
Sun Mark Exploration -B- #B 1
Caldwell County · Salt Flat West field · Vertical
Sun Mark Exploration -B- #B 1 (API 42-055-32271) is a well in Caldwell County operated by Petro-Guard Company Inc., completed January 26, 1982.
The RRC has issued one drilling permit, issued September 4, 1981, permitted to 3,000 ft.
It was permitted by Barrow, William R. Interests and has since transferred to Petro-Guard Company Inc. on the wellbore schedule.
Its lease has reported 20.9K barrels of oil and 24.6K mcf of gas since January 1993, last reporting in July 2026. The lease carries 6 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Barrow, William R. Interests; the EWA schedule now lists a different operator.
Houston, TX · P-5 Y, filed Feb 5, 1999 · 3 permits on file
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Petro-Guard Company Inc. |
| Production reports | Castillo Oil Company LLCthrough Apr 2026 |
| Latest permit | Barrow, William R. InterestsSep 4, 1981 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 3,000
- total depth, ft
- 1
- permits on file
- Sep 4, 1981
- last permit issued
- Jan 26, 1982
- completed
- 20.9K
- cumulative oil, bbl
- 24.6K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jan 26, 1982
- 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 lease this well is completed on; they carry 6 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Sun Mark Exploration O-1-7875 | Salt Flat, West | Castillo Oil Company LLC | 6 | 20.9K | 24.6K | Jan 1993 – Jul 2026 |
Oil, barrels lease total
Last 12 months 234 · prior 12 524(-55%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Polo Petroleum, Inc.Jan 1993 → Jul 1993
- 2Mitchell Production, Inc.Aug 1993 → Jan 1997
- 3Thomas Oil & Gas CompanyFeb 1997 → Apr 2003
- 4LTS Energy, L.P.Aug 1998 → Nov 2006
- 5Castillo Oil Co.Dec 2006 → Feb 2007
- 6Castillo Oil Company LLCMar 2007 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 132268-99 | Drill | Barrow, William R. Interests | Sep 4, 1981 | Sep 4, 1981 | — | 3,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-1-7875 | — | — | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 2,345 | 2,555 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 2.375 | 2,300 | — | — |
| 4.5 | 2,682 | 7.875 | 500 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 | Jun 23, 1989 | Mar 25, 1982 | — |
| 00 | Jun 21, 1989 | — | — |
| 00 | Jan 12, 1984 | Mar 25, 1982 | — |
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 42-055-32271 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-055-32271 → 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/05532271, documented in the API reference.