WELL · 42-329-38955 · DISTRICT 8
Armstrong 36 #4
Midland County · Spraberry (Trend Area) field · Vertical
Armstrong 36 #4 (API 42-329-38955) is a plugged well in Midland County, plugged April 29, 2026, last operated by Diamondback E&P LLC.
The RRC has issued one drilling permit, issued November 21, 2013, permitted to 12,000 ft.
It was permitted by Breitburn Operating L.P. and has since transferred to Diamondback E&P LLC on the wellbore schedule.
Completion filings report 3 formation tops, including Spraberry, Strawn, Atoka.
Its lease has reported 292K barrels of oil and 964K mcf of gas since May 2012, last reporting in July 2026. The lease carries 4 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Breitburn Operating L.P.; the EWA schedule now lists a different operator.
- Based in
- Midland, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- May 4, 2026
- Permits on file
- 5,237
- Phone
- (432) 221-7400
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Diamondback E&P LLC |
| Production reports | Diamondback E&P LLCthrough Apr 2026 |
| Latest permit | Breitburn Operating L.P.Nov 21, 2013 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 12,000
- total depth, ft
- 1
- permits on file
- Nov 21, 2013
- last permit issued
- Feb 25, 2014
- completed
- 292K
- cumulative oil, bbl
- 964K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · May 2012 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Feb 25, 2014
- Shut in
- —
- Plugged
- Apr 29, 2026
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 4 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Armstrong 36 O-10-43442 | Spraberry (Trend Area) | Diamondback E&P LLC | 4 | 292K | 964K | May 2012 – Jul 2026 |
Oil, barrels lease total
Last 12 months 9,199 · prior 12 19,230(-52%)
Gas, mcf lease total
Last 12 months 47,545 · prior 12 46,688(+2%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Crownquest Operating, LLCMay 2012 → Nov 2012
- 2Breitburn Operating L.P.Dec 2012 → Mar 2018
- 3Birch Operations, Inc.Apr 2018 → Oct 2019
- 4Endeavor Energy Resources L.P.Nov 2019 → Dec 2024
- 5Diamondback E&P LLCJan 2025 → Mar 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 771920-99 | Drill | Breitburn Operating L.P. | Oct 16, 2013 | Nov 21, 2013 | Dec 19, 2013 | 12,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Feb 25, 2014 | Armstrong 36 O-10-43442 | Spraberry (Trend Area) | Diamondback E&P LLC | Plugged | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,695 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,032 | 10,605 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 280 | 17.5 | 350 S |
| 8.625 | 5,104 | 11 | 1,150 S |
| 5.5 | 11,556 | 7.875 | 1,900 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 | Aug 27, 2014 | Aug 2, 2014 | 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 42-329-38955 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-329-38955 → 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/32938955, documented in the API reference.