TEXAS · WELLS · GLASSCOCK COUNTY · CALVERLEY 36S LEASE · API 42-173-31827 · DISTRICT 7B
Calverley 36S #5
Glasscock County · Spraberry (Trend Area) field · Vertical
Calverley 36s #5 (API 42-173-31827) is a plugged well in Glasscock County, plugged February 25, 2018, last operated by Cog Operating LLC.
The RRC has issued one drilling permit, issued March 22, 1985, permitted to 9,000 ft.
It was permitted by Cox, John L. and has since transferred to Cog Operating LLC on the wellbore schedule.
Completion filings report 3 formation tops, including Cretaceous, Spraberry, Dean.
Its lease has reported 157K barrels of oil and 534K mcf of gas since January 1993, last reporting in July 2026. The lease carries 7 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Cox, John L.; the EWA schedule now lists a different operator.
- Based in
- Midland, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- Jun 2, 2026
- Permits on file
- 4,568
- Phone
- (432) 683-7443
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | COG Operating LLC |
| Production reports | COG Operating LLCthrough Apr 2026 |
| Latest permit | Cox, John L.Mar 22, 1985 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 9,000
- total depth, ft
- 1
- permits on file
- Mar 22, 1985
- last permit issued
- Aug 12, 1985
- completed
- 157K
- cumulative oil, bbl
- 534K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Aug 12, 1985
- Shut in
- —
- Plugged
- Feb 25, 2018
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 7 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Calverley 36S O-10-22021 | Spraberry (Trend Area) | COG Operating LLC | 7 | 157K | 534K | Jan 1993 – Jul 2026 |
Oil, barrels lease total
Last 12 months 3,047 · prior 12 2,507(+22%)
Gas, mcf lease total
Last 12 months 8,841 · prior 12 4,675(+89%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Cox, John L.Jan 1993 → Sep 2003
- 2JM Cox Resources, L.P.Oct 2003 → Aug 2014
- 3RSP Permian, LLCSep 2014 → Jul 2018
- 4COG Operating LLCAug 2018 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 270212-99 | Drill | Cox, John L. | Mar 15, 1985 | Mar 22, 1985 | — | 9,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Aug 12, 1985 | Calverley 36S O-10-22021 | Spraberry (Trend Area) | COG Operating LLC | Plugged | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,705 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,634 | 6,945 | Perforated |
| 7,243 | 7,588 | Perforated |
| 8,026 | 8,200 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 341 | 17.5 | 400 S |
| 8.625 | 4,200 | 11 | 1,000 S |
| 4.5 | 8,400 | 7.875 | 1,400 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 | Sep 24, 1985 | Aug 19, 1985 | — |
| 00 | Sep 14, 1985 | — | — |
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 42-173-31827 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-173-31827 → 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/17331827, documented in the API reference.