WELL · 42-301-31513 · DISTRICT 8
CBR 4 #21
Loving County · Red Bluff (Brushy Canyon) field · Vertical
Cbr 4 #21 (API 42-301-31513) is a well in Loving County operated by Rki Exploration & Production LLC, completed March 12, 2010.
The RRC has issued one drilling permit (amended once), issued October 20, 2009, permitted to 7,500 ft.
Completion filings report 3 formation tops, including Delaware, Brushy Canyon, Bone Spring.
Its 2 leases have reported 496K barrels of oil and 820K mcf of gas since January 2010, last reporting in July 2026. The leases carry 10 wells, so these are lease totals, not this well alone.
Operator of record
RKI Exploration & Production LLC
Tulsa, OK · P-5 Y, filed Feb 4, 2026 · 424 permits on file · (800) 667-6958
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | RKI Exploration & Production LLC |
| Production reports | WPX Energy Permian, LLCthrough Mar 2026 |
| Latest permit | RKI Exploration & Production LLCOct 20, 2009 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 7,500
- total depth, ft
- 2
- permits on file
- Oct 20, 2009
- last permit issued
- Mar 12, 2010
- completed
- 496K
- cumulative oil, bbl
- 820K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 2010 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Mar 12, 2010
- 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 10 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| CBR 4 O-10-43188 | Red Bluff (Consolidated) | WPX Energy Permian, LLC | 7 | 370K | 710K | Jun 2013 – Jul 2026 |
| CBR 4 O-10-41736 | Red Bluff (Brushy Canyon) | RKI Exploration & Production LLC | 3 | 126K | 110K | Jan 2010 – Nov 2013 |
Oil, barrels lease total
Last 12 months 4,350 · prior 12 10,972(-60%)
Gas, mcf lease total
Last 12 months 3,392 · prior 12 18,209(-81%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1RKI Exploration & Production LLCJan 2010 → Apr 2018
- 2WPX Energy Permian, LLCMay 2018 → Mar 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 686337-98 | Drill | RKI Exploration & Production LLC | Mar 18, 2010 | Oct 20, 2009 | Oct 30, 2009 | 7,500 |
| 686337-99 | Drill | RKI Exploration & Production LLC | Oct 20, 2009 | Oct 20, 2009 | Nov 10, 2009 | 7,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-41736 | — | — | — | — |
| — | — O-10-43188 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,971 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Delaware | 3,435 | -464 |
| Brushy Canyon | 5,589 | -2,618 |
| Bone Spring | 7,314 | -4,343 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,307 | 6,331 | Perforated |
| 6,333 | 6,374 | Perforated |
| 6,581 | 6,602 | Perforated |
| 6,608 | 6,635 | Perforated |
| 6,640 | 6,680 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 987 | 17.5 | 770 S |
| 8.625 | 3,395 | 11 | 1,445 S |
| 5.5 | 7,586 | 7.875 | 525 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 | Oct 9, 2013 | Aug 25, 2011 | Yes |
| 00 | Feb 20, 2013 | Aug 25, 2011 | 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 42-301-31513 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-301-31513 → 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/30131513, documented in the API reference.