WELL · 42-461-10323 · DISTRICT 7
McElroy Ranch Co. -F- #21
Upton County · Block 42 (Wolfcamp) field · Vertical
Mcelroy Ranch CO. -F- #21 (API 42-461-10323) is a plugged well in Upton County, plugged September 25, 2019, last operated by Firebird Energy LLC.
The RRC has issued one drilling permit, issued July 23, 2015, permitted to 9,450 ft.
It was permitted by Devon Energy Production CO, L.P. and has since transferred to Firebird Energy LLC on the wellbore schedule.
Completion filings report 5 formation tops, including Rustler, Yates, Mcelroy, Strawn.
Its 2 leases have reported 372K barrels of oil and 5.39M mcf of gas since January 1993, last reporting in July 2026. The leases carry 25 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Devon Energy Production Co, L.P.; the EWA schedule now lists a different operator.
- Based in
- Fort Worth, TX
- P-5 status
- Delinquent (D)
- P-5 last filed
- Apr 26, 2023
- Permits on file
- 152
- Phone
- (817) 857-7800
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Firebird Energy LLC |
| Production reports | Diamondback E&P LLCthrough Apr 2026 |
| Latest permit | Devon Energy Production Co, L.P.Jul 23, 2015 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 9,450
- total depth, ft
- 1
- permits on file
- Jul 23, 2015
- last permit issued
- Oct 1, 2015
- completed
- 372K
- cumulative oil, bbl
- 5.39M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Oct 1, 2015
- Shut in
- —
- Plugged
- Sep 25, 2019
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 25 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| McElroy Ranch Co. -F- O-9-2590 | Block 42 (Penn) | Diamondback E&P LLC | 23 | 372K | 5.39M | Jan 1993 – Jul 2026 |
| McElroy Ranch Co. -F- O-9-4416 | Block 42 (Wolfcamp) | Firebird Energy LLC | 2 | 0 | 0 | Jan 1993 – Apr 2020 |
Gas, mcf lease total
Last 12 months 77,914 · prior 12 32,450(+140%)
Oil, barrels lease total
Last 12 months 3,560 · prior 12 1,472(+142%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Pennzoil Petroleum CompanyJan 1993 → Jan 1995
- 2Pennzoil Exploration & Prod. Co.Feb 1995 → Sep 1995
- 3Umc Petroleum CorporationOct 1995 → Jul 1998
- 4Ocean Energy, Inc.Aug 1998 → Aug 2003
- 5Devon Louisiana CorporationSep 2003 → Dec 2005
- 6Devon Energy Production Co, L.P.Jan 2006 → Jul 2016
- 7FDL Operating, LLCAug 2016 → Jun 2019
- 8Firebird Energy LLCJul 2019 → Nov 2022
- 9Diamondback E&P LLCDec 2022 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 808520-99 | Recompletion | Devon Energy Production Co, L.P. | Jul 16, 2015 | Jul 23, 2015 | Aug 19, 2015 | 9,450 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-9-2590 | — | — | — | — |
| — | — O-9-4416 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,663 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,284 | 8,292 | Perforated |
| — | 9,283 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 4,350 | 12.25 | 1,125 S |
| 4.5 | 9,479 | 7.875 | 650 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 | Apr 26, 2016 | Jan 26, 2016 | Yes |
| 00 | Jan 12, 1984 | — | — |
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 42-461-10323 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-461-10323 → scanned completion filings
Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward) and the University Lands library. 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/46110323, documented in the API reference.