WELL · 42-219-34989 · DISTRICT 8
Cobb Tom A #12
Hockley County · Yellowhouse field · Vertical
Cobb Tom A #12 (API 42-219-34989) is a plugged well in Hockley County, plugged July 11, 1989, last operated by Hilcorp Energy Company.
The RRC has issued one drilling permit, issued August 18, 1986, permitted to 4,800 ft.
It was permitted by Hanover Energy Inc. and has since transferred to Hilcorp Energy Company on the wellbore schedule.
Completion filings report 3 formation tops, including Rustler, Yates, San Andres.
Operator of record
Permitted by Hanover Energy Inc.; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- Mar 27, 2026
- Permits on file
- 3,454
- Phone
- (713) 209-2400
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Hilcorp Energy Company |
| Production reports | none |
| Latest permit | Hanover Energy Inc.Aug 18, 1986 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 4,800
- total depth, ft
- 1
- permits on file
- Aug 18, 1986
- last permit issued
- Oct 15, 1986
- completed
- —
- cumulative oil, bbl
- —
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Oct 15, 1986
- Shut in
- —
- Plugged
- Jul 11, 1989
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.
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 305361-99 | Drill | Hanover Energy Inc. | Aug 18, 1986 | Aug 18, 1986 | — | 4,800 |
Formation tops
As filed on W-2/G-1. Subsea from 3,576 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| RustlerRUSTLER ANHYDRITE | 1,928 | 1,648 |
| YatesYATES SAND | 2,432 | 1,144 |
| San AndresSAN ANDRES ZONE VIII | 4,580 | -1,004 |
| San AndresSAN ANDRES ZONE IX | 4,616 | -1,040 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 4,558 | 4,688 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 420 | 12.25 | 250 S |
| 5.5 | 4,558 | 7.875 | 1,100 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 | Dec 8, 1986 | Nov 17, 1986 | Yes |
| 00 | Nov 27, 1986 | — | — |
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 42-219-34989 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-219-34989 → 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/21934989, documented in the API reference.