WELL · 42-461-41121 · DISTRICT 7
Windham TXL R21 #3005LH
Upton County · Pegasus (Consolidated) field · Producing · Horizontal
Windham Txl R21 #3005LH (API 42-461-41121) is a horizontal well in Upton County operated by Cog Operating LLC, completed March 17, 2020 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued March 1, 2019, permitted to 12,000 ft.
Completion filings report 9 formation tops, including Yates, Grayburg, San Andres, Spraberry.
Its lease has reported 292K barrels of oil and 1.9M mcf of gas since March 2020, last reporting in July 2026.
Operator of record
- 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 | COG Operating LLCMar 1, 2019 |
- 12,000
- total depth, ft
- 2
- permits on file
- Mar 1, 2019
- last permit issued
- Mar 17, 2020
- completed
- 292K
- cumulative oil, bbl
- 1.9M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Mar 2020 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Mar 17, 2020
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active – Extension (X)
Surface location
31.631567, -102.096975
Permit surface location from the RRC GIS record, in Upton County.
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; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Windham TXL R21 O-9-20973 | Pegasus (Consolidated) | COG Operating LLC | 1 | 292K | 1.9M | Mar 2020 – Jul 2026 |
Gas, mcf lease total
Last 12 months 139,780 · prior 12 372,654(-62%)
Oil, barrels lease total
Last 12 months 7,767 · prior 12 15,377(-49%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1COG Operating LLCMar 2020 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 850322-98 | Drill | COG Operating LLC | Apr 22, 2020 | Mar 1, 2019 | Jul 31, 2019 | 12,000 |
| 850322-99 | Drill | COG Operating LLC | Feb 22, 2019 | Mar 1, 2019 | Jul 31, 2019 | 12,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-9-20973 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,853 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Yates | 2,709 | 144 |
| Grayburg | 3,945 | -1,092 |
| San AndresSAN ANDRES - SALTWATER FLOW | 4,775 | -1,922 |
| Spraberry | 7,905 | -5,052 |
| Devonian | — | — |
| Ellenburger | — | — |
| Fusselman | — | — |
| Strawn | — | — |
| Wolfcamp | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,220 | 19,470 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 1,638 | 17.5 | 1,301 S |
| 9.625 | 8,184 | 12.25 | 975 S |
| 5.5 | 19,575 | 8.5 | 2,220 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 | Jul 9, 2020 | Jun 8, 2020 | 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 42-461-41121 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-461-41121 → 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.
Nearby wells and their tops
NEAREST 8 LOCATED WELLS WITH TOPS · WITHIN 16 KM
Draw a cross-section
This well's tops beside its 5 nearest neighbors, subsea-aligned so they line up regardless of surface terrain.
Windham TXL R2242-461-41114
0.0 KM · COG Operating LLC · Section with this well →
| Yates | 2,709 | 144 |
| Grayburg | 3,000 | -147 |
| San Andres | 4,775 | -1,922 |
| Spraberry | 8,662 | -5,809 |
| Wolfcamp | 9,437 | -6,584 |
| Fusselman | — | |
| Ellenburger | — | |
| Strawn | — |
9 TOPS · FIRST 8
Windham B942-461-40690
0.2 KM · COG Operating LLC · Section with this well →
| Yates | 905 | 1,944 |
| Grayburg | 1,662 | 1,187 |
| San Andres | 4,755 | -1,906 |
| Spraberry | 8,667 | -5,818 |
| Wolfcamp | 9,652 | -6,803 |
| Devonian | — | |
| Ellenburger | — | |
| Fusselman | — |
9 TOPS · FIRST 8
Windham B842-461-40689
0.2 KM · COG Operating LLC · Section with this well →
| Yates | 905 | 1,944 |
| Grayburg | 1,200 | 1,649 |
| San Andres | 4,769 | -1,920 |
| Spraberry | 8,670 | -5,821 |
| Wolfcamp | 9,664 | -6,815 |
| Ellenburger | — | |
| Fusselman | — | |
| Devonian | — |
9 TOPS · FIRST 8
Windham B1042-461-40692
0.2 KM · COG Operating LLC · Section with this well →
| Yates | 903 | 1,946 |
| Grayburg | 2,886 | -37 |
| San Andres | 4,769 | -1,920 |
| Spraberry | 8,668 | -5,819 |
| Wolfcamp | 9,664 | -6,815 |
| Devonian | — | |
| Ellenburger | — | |
| Fusselman | — |
9 TOPS · FIRST 8
Windham TXL R2042-461-41098
0.2 KM · COG Operating LLC · Section with this well →
| Yates | 2,712 | 145 |
| Grayburg | 4,066 | -1,209 |
| San Andres | 4,781 | -1,924 |
| Spraberry | 7,703 | -4,846 |
| Wolfcamp | 9,440 | -6,583 |
| Devonian | — | |
| Fusselman | — | |
| Strawn | — |
9 TOPS · FIRST 8
Windham TXL R1942-461-41100
0.2 KM · COG Operating LLC · Section with this well →
| Yates | 2,712 | 145 |
| Grayburg | 4,066 | -1,209 |
| San Andres | 4,781 | -1,924 |
| Spraberry | 8,664 | -5,807 |
| Wolfcamp | 9,151 | -6,294 |
| Ellenburger | — | |
| Fusselman | — | |
| Strawn | — |
9 TOPS · FIRST 8
Windham TXL R1842-461-41101
0.2 KM · COG Operating LLC · Section with this well →
| Yates | 2,712 | 145 |
| Grayburg | 3,000 | -143 |
| San Andres | 4,781 | -1,924 |
| Spraberry | 7,908 | -5,051 |
| Wolfcamp | 9,151 | -6,294 |
| Ellenburger | — | |
| Strawn | — | |
| Fusselman | — |
9 TOPS · FIRST 8
Windham B442-461-40698
0.4 KM · COG Operating LLC · Section with this well →
| Yates | 903 | 1,942 |
| Grayburg | 1,662 | 1,183 |
| San Andres | 4,756 | -1,911 |
| Spraberry | 8,664 | -5,819 |
| Wolfcamp | 9,654 | -6,809 |
| Devonian | — | |
| Strawn | — | |
| Fusselman | — |
9 TOPS · FIRST 8
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/46141121, documented in the API reference.