WELL · 42-383-37580 · DISTRICT 7
Rocker B -F- #10
Reagan County · Spraberry (Trend Area) field · Vertical
Rocker B -F- #10 (API 42-383-37580) is a well in Reagan County operated by Discovery Natural Resources LLC, completed February 16, 2012.
The RRC has issued one drilling permit (amended once), issued November 22, 2011, permitted to 10,000 ft.
It was permitted by JM Cox Resources, L.P. and has since transferred to Discovery Natural Resources LLC on the wellbore schedule.
Completion filings report 5 formation tops, including Spraberry, Dean, Wolfcamp, Cline.
Its 2 leases have reported 7.59M barrels of oil and 55.1M mcf of gas since January 1993, last reporting in July 2026. The leases carry 142 wells, so these are lease totals, not this well alone.
Operator of record
Discovery Natural Resources LLC
Permitted by JM Cox Resources, L.P.; the EWA schedule now lists a different operator.
- Based in
- Denver, CO
- P-5 status
- Active (A)
- P-5 last filed
- Jan 12, 2026
- Permits on file
- 451
- Phone
- (303) 893-5073
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Discovery Natural Resources LLC |
| Production reports | Discovery Natural Resources LLCthrough Apr 2026 |
| Latest permit | JM Cox Resources, L.P.Nov 22, 2011 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 10,000
- total depth, ft
- 2
- permits on file
- Nov 22, 2011
- last permit issued
- Feb 16, 2012
- completed
- 7.59M
- cumulative oil, bbl
- 55.1M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Feb 16, 2012
- 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 142 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Bullhead O-9-20070 | Spraberry (Trend Area) | Discovery Natural Resources LLC | 132 | 7.48M | 54.2M | Nov 2018 – Jul 2026 |
| Rocker B -F- O-9-4577 | Spraberry (Trend Area) | Discovery Natural Resources LLC | 10 | 103K | 885K | Jan 1993 – Jan 2019 |
Gas, mcf lease total
Last 12 months 10,311,743 · prior 12 10,722,552(-4%)
Oil, barrels lease total
Last 12 months 1,333,222 · prior 12 1,525,825(-13%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Graham Royalty, Ltd.Jan 1993 → Oct 1993
- 2Cox, John L.Nov 1993 → Sep 2003
- 3JM Cox Resources, L.P.Oct 2003 → Jul 2018
- 4Discovery Natural Resources LLCOct 2018 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 728710-98 | Drill | JM Cox Resources, L.P. | Apr 30, 2013 | Nov 22, 2011 | Nov 23, 2011 | 10,000 |
| 728710-99 | Drill | JM Cox Resources, L.P. | Nov 21, 2011 | Nov 22, 2011 | Nov 23, 2011 | 10,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-9-4577 | — | — | — | — |
| — | — O-9-20070 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,588 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,045 | 7,246 | Perforated |
| 7,316 | 7,520 | Perforated |
| 7,595 | 7,816 | Perforated |
| 7,922 | 8,114 | Perforated |
| 8,216 | 8,417 | Perforated |
| 8,494 | 8,699 | Perforated |
| 8,882 | 9,451 | Perforated |
| 9,230 | 9,440 | Perforated |
| 9,460 | 9,504 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 624 | 17.5 | 620 S |
| 8.625 | 4,020 | 11 | 835 S |
| 5.5 | 9,666 | 7.875 | 1,200 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 | Jan 27, 2022 | Jan 25, 2022 | — |
| 00 | Dec 13, 2018 | May 15, 2012 | Yes |
| 00 | May 16, 2013 | May 15, 2012 | 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 42-383-37580 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-383-37580 → 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/38337580, documented in the API reference.