WELL · 42-211-31845 · DISTRICT 10
Piper O. S. #1
Hemphill County · Sparks (Tonkawa) field · Vertical
Piper O. S. #1 (API 42-211-31845) is a well in Hemphill County operated by Granite Operating Company, completed May 22, 1987.
The RRC has issued one drilling permit (amended once), issued October 27, 1986, permitted to 11,300 ft.
It was permitted by Mobil Producing TX. & N.M. Inc. and has since transferred to Granite Operating Company on the wellbore schedule.
Completion filings report 2 formation tops, including Tonkawa, Morrow.
Its 2 leases have reported 6.45K barrels of oil and 139K mcf of gas since January 1993, last reporting in July 2026. The leases carry 2 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Mobil Producing TX. & N.M. Inc.; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Inactive (I)
- P-5 last filed
- Nov 14, 2023
- Permits on file
- 84
- Phone
- (713) 296-6000
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Granite Operating Company |
| Production reports | Apache Corporationthrough Mar 2016 |
| Latest permit | Mobil Producing TX. & N.M. Inc.Oct 27, 1986 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 11,300
- total depth, ft
- 2
- permits on file
- Oct 27, 1986
- last permit issued
- May 22, 1987
- completed
- 6.45K
- cumulative oil, bbl
- 139K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- May 22, 1987
- 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 2 leases this well is completed on; they carry 2 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Piper, O. S. O-14-8186 | Feldman (Tonkawa) | Upland Resources LLC | 1 | 1.07K | 24.6K | Oct 2009 – Jul 2026 |
| Piper, O. S. O-14-6441 | Sparks (Tonkawa) | Granite Operating Company | 1 | 5.38K | 115K | Jan 1993 – Apr 2011 |
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.
- 1Upland Resources, Inc.Jan 1993 → Nov 2007
- 2Granite Operating CompanyJan 2008 → Apr 2012
- 3Apache CorporationMay 2012 → Mar 2016
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 322254-98 | Drill | Mobil Producing TX. & N.M. Inc. | Mar 23, 1987 | Oct 27, 1986 | — | 11,300 |
| 322254-99 | Drill | Mobil Producing TX. & N.M. Inc. | Oct 23, 1986 | Oct 27, 1986 | — | 11,300 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-14-6441 | — | — | — | — |
| — | — O-14-8186 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,638 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,541 | 7,550 | Perforated |
| 7,552 | 7,557 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 20 | 40 | — | — |
| 13.375 | 1,219 | 17.5 | 1,305 S |
| 9.625 | 5,600 | 12.25 | 2,400 S |
| 5.5 | 11,276 | 8.75 | 1,930 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 | Mar 15, 2011 | Jun 3, 1987 | Yes |
| 00 | Jun 15, 1987 | Jun 3, 1987 | Yes |
| 00 | Jun 9, 1987 | — | — |
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 42-211-31845 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-211-31845 → 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/21131845, documented in the API reference.