WELL · 42-383-34157 · DISTRICT 7

Rocker B -M- #M 43

Reagan County · Spraberry (Trend Area) field · Vertical

Rocker B -M- #M 43 (API 42-383-34157) is a well in Reagan County operated by Discovery Natural Resources LLC, completed March 23, 1992.

The RRC has issued 2 drilling permits between 1991 and 2021, permitted to 8,500 ft.

Completion filings report 3 formation tops, including Spraberry, Dean, Wolfcamp.

Its 2 leases have reported 8.58M barrels of oil and 60.4M mcf of gas since January 1993, last reporting in July 2026. The leases carry 179 wells, so these are lease totals, not this well alone.

Operator of record

Discovery Natural Resources LLC

Denver, CO · P-5 Y, filed Oct 4, 2025 · 449 permits on file · (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	Discovery Natural Resources LLCDec 30, 2021

8,500: total depth, ft
2: permits on file
Dec 30, 2021: last permit issued
Mar 23, 1992: completed
8.58M: cumulative oil, bbl
60.4M: cumulative gas, mcf

PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026

Regulatory status · RRC wellbore file

Schedule: OFF SCHEDULE
Completed: Mar 23, 1992
Shut in: —
Plugged: —

Surface location

31.316375, -101.376766

OpenStreetMap → · Google Maps →

Permit surface location from the RRC GIS record, in Reagan County.

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 179 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 -M- O-9-4855	Spraberry (Trend Area)	Discovery Natural Resources LLC	47	1.1M	6.21M	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 → Aug 2018
4Discovery Natural Resources LLCSep 2018 → Apr 2026

Permits

Permit	Type	Operator	Received	Issued	Spud	Depth
875530-99	Recompletion	Discovery Natural Resources LLC	Dec 21, 2021	Dec 30, 2021	Dec 17, 2021	8,500
394424-99	Drill	Graham Royalty, Ltd.	Dec 5, 1991	Dec 12, 1991	Jan 4, 1992	6,950

Completions

Completed	Lease	Field	Operator	Status	Depth
—	— O-9-4855	—	—	—	—
—	— O-9-20070	—	—	—	—

Formation tops

As filed on W-2/G-1. Subsea from 2,476 ft elevation.Download CSV →

Formation	MD ft	Subsea
SpraberryUPPER SPRABERRY	5,248	-2,772
SpraberryMIDDLE SPRABERRY	5,700	-3,224
SpraberryLOWER SPRABERRY	6,238	-3,762
Dean	6,688	-4,212
Wolfcamp	6,798	-4,322
Wolfcamp	6,852	-4,376
WolfcampMIDDLE WOLFCAMP	7,150	-4,674
WolfcampLOWER WOLFCAMP	7,498	-5,022

Perforations

Perforated and open-hole intervals.

From	To	Type
5,275	5,293	Perforated
5,850	6,185	Perforated
6,711	6,844	Perforated
7,230	7,458	Perforated

Casing

Strings as reported, shallowest first.

Casing in	Set at	Hole in	Cement
8.625	606	11	295 S
4.5	6,950	7.875	1,385 S
3.5	7,966	7.875	50 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 →

Filed	W-2 / G-1 date	Logs referenced
Dec 28, 2022	Sep 19, 2022	Yes
Dec 13, 2018	Apr 13, 1992	Yes
Apr 28, 1992	Apr 13, 1992	Yes
Apr 23, 1992	—	—

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 42-383-34157 → W-2, G-1, plugging reports, as PDFs
Completion packets for 42-383-34157 → 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 neighbours, subsea-aligned so they line up regardless of surface terrain.

Open the cross-section →

Rocker B "M"42-383-33271

0.9 KM · Discovery Natural Resources LLC · Section with this well →

Santa Rosa	550	1,912
Spraberry	5,260	-2,798
Spraberry	5,870	-3,408
Dean	6,690	-4,228
Wolfcamp	6,798	-4,336
Wolfcamp	7,215	-4,753
Wolfcamp	7,460	-4,998

Chili42-383-40739

3.1 KM · Discovery Natural Resources LLC · Section with this well →

Queen	1,891	590
Grayburg	2,105	376
San Andres	2,658	-177
Clear Fork	3,699	-1,218
Spraberry	5,193	-2,712
Dean	6,564	-4,083
Wolfcamp	6,717	-4,236
Fusselman	—

10 TOPS · FIRST 8

Chili A42-383-40741

3.1 KM · Discovery Natural Resources LLC · Section with this well →

Queen	1,882	599
Grayburg	2,103	378
San Andres	2,618	-137
Clear Fork	3,966	-1,485
Spraberry	5,168	-2,687
Dean	6,568	-4,087
Wolfcamp	6,721	-4,240
Strawn	—

10 TOPS · FIRST 8

Chili42-383-40740

3.1 KM · Discovery Natural Resources LLC · Section with this well →

Queen	1,891	590
Grayburg	2,096	385
San Andres	2,587	-106
Clear Fork	3,939	-1,458
Spraberry	5,168	-2,687
Fusselman	—
Ellenburger	—
Strawn	—

Chili B42-383-41242

3.1 KM · Discovery Natural Resources LLC · Section with this well →

Queen	1,902	579
Grayburg	2,103	378
San Andres	2,661	-180
Clear Fork	3,939	-1,458
Spraberry	5,161	-2,680
Dean	6,562	-4,081
Wolfcamp	6,715	-4,234
Ellenburger	—

10 TOPS · FIRST 8

Bullhead42-383-41431

3.7 KM · Discovery Natural Resources LLC · Section with this well →

Queen	2,070	519
Grayburg	2,344	245
San Andres	2,904	-315
Clear Fork	4,217	-1,628
Spraberry	5,464	-2,875
Strawn	—
Ellenburger	—
Fusselman	—

Bullhead42-383-41382

3.7 KM · Discovery Natural Resources LLC · Section with this well →

Queen	2,065	524
Grayburg	2,338	251
San Andres	2,896	-307
Clear Fork	4,234	-1,645
Spraberry	5,474	-2,885
Strawn	—
Ellenburger	—
Fusselman	—

Bullhead42-383-41383

3.7 KM · Discovery Natural Resources LLC · Section with this well →

Queen	2,075	514
Grayburg	2,343	246
San Andres	2,889	-300
Clear Fork	4,232	-1,643
Spraberry	5,470	-2,881
Strawn	—
Ellenburger	—
Fusselman	—

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/38334157, documented in the API reference.