TEXAS · WELLS · MARTIN COUNTY · UNIVERSITY "40-B"#1 LEASE · API 42-317-33913 · DISTRICT 7B
University 40-B #1 #1
Martin County · Spraberry (Trend Area) field · Producing · Vertical
University 40-B #1 #1 (API 42-317-33913) is a well in Martin County operated by Diamondback E&P LLC, completed March 12, 2026 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued June 17, 1992, permitted to 13,400 ft.
It was permitted by Cox, John L. and has since transferred to Diamondback E&P LLC on the wellbore schedule.
Completion filings report 9 formation tops, including Redbeds, Grayburg, Spraberry, Dean.
Its lease has reported 27.9K barrels of oil and 64.9K mcf of gas since the record begins in January 1993, last reporting volume in August 2026.
Operator of record
Permitted by Cox, John L.; the EWA schedule now lists a different operator.
- Based in
- Midland, TX
- P-5 status
- Active (A)
- P-5 last filed
- May 4, 2026
- Permits on file
- 5,254
- Phone
- (432) 221-7400
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Diamondback E&P LLC |
| Production reports | Diamondback E&P LLCthrough May 2020 |
| Latest permit | Cox, John L.Jun 17, 1992 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 13,400
- total depth, ft
- 1
- permits on file
- Jun 17, 1992
- last permit issued
- Mar 12, 2026
- completed
- 27.9K
- cumulative oil, bbl
- 64.9K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · ON RECORD FROM JAN 1993, THE RECORD'S FIRST MONTH, THROUGH AUG 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Mar 12, 2026
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active (A)
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.
Wells nearby
Every well with a location on file around this well, in any state, nearest first.
Texas locations come from drilling permits, so most older Texas wells have none and are not listed.
Lease production
PDQ LEASE REPORTS · REPORTED THROUGH AUG 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 |
|---|---|---|---|---|---|---|
| University "40-B"#1 O-10-33553 | Spraberry (Trend Area) | Diamondback E&P LLC | 1 | 27.9K | 64.9K | by Jan 1993 – Aug 2026 |
Oil, barrels lease total
Last 12 months 370 · prior 12 0
Gas, mcf lease total
Last 12 months 323 · prior 12 0
Wells named University 40-B #1
Diamondback E&P LLC's other wells filed under this lease name in Martin County, newest permit first. The RRC gives a gas well its own lease number, so the name is what joins the wells of a unit.
Loading the lease's wellsChain of custody
Every operator that reported production on this well's lease, in order.
- 1Cox, John L.Jan 1993 → Jun 2000
- 2Alpine Resources, Inc.Jul 2000 → Jun 2001
- 3Endeavor Energy Resources L.P.Jul 2001 → May 2019
- 4QEP Energy CompanyJun 2019 → May 2020
- 5Diamondback E&P LLCJun 2026 → Aug 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 400260-99 | Drill | Cox, John L. | Jun 16, 1992 | Jun 17, 1992 | Jul 6, 1992 | 13,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Mar 12, 2026 | University 40-B #1 O-10-33553 | Spraberry (Trend Area) | Diamondback E&P LLC | Producing | 13,400 |
Formation tops
As filed on W-2/G-1. Subsea from 2,934 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,952 | 9,248 | Perforated |
| 9,479 | 9,872 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 400 | 17.5 | 420 S |
| 8.625 | 5,280 | 11 | 1,200 S |
| 4.5 | 10,310 | 7.875 | 1,600 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. The record date is the RRC's own date on the record, not the day the report was filed: 462,034 of the state's filings carry 1984-01-12. About these reports →
| Suffix | RRC record date | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Aug 12, 2026 | Jun 15, 2026 | — |
| 00 | Feb 12, 2024 | Nov 28, 2023 | — |
| 00 | Oct 29, 1992 | Sep 18, 1992 | Yes |
| 00 | Sep 25, 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 42-317-33913 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-317-33913 → scanned completion filings
Log images filed since 2004 open from the RRC's log search for this well; none are loaded here for it. The University Lands library has no per-well link: then paste it into its 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/31733913, documented in the API reference.