42-461-31370

Final Completion

LYNCH

UPTON County · District 7 · COX JOHN L. · OLD UPLAND (WOLFCAMP)

Permits

Max Depth

10,400 ft

First Permit

1978-10-19

Latest Activity

1980-09-03

Lifespan

2 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

1979-01-15

Shut-In

—

Plugged

—

EWA / Production operator mismatch

Scheduling: COX JOHN L. ≠ Production: PIONEER NATURAL RES. USA, INC. (reported 2026-04)

Resolved via: production → PIONEER NATURAL RES. USA, INC.

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

1993-01

Last Production

2026-07

Operator History

Chain of Custody

COX, JOHN L. 1993-2003→ JM COX RESOURCES, L.P. 2003-2018→ DE3 OPERATING LLC 2018-2021→ PIONEER NATURAL RES. USA, INC. 2021-2026

Lease Production

Production is reported at the lease level. View production data, decline curves, and history on the lease page.

Gas

production & DCA →

Formation Tops (4) Elevation 2,607 ft (GR)

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
REDBEDS	385 ft	+2,222 ft
SPRABERRY	6,944 ft	-4,337 ft
WOLFCAMP	8,394 ft	-5,787 ft
BEND	10,000 ft	-7,393 ft

As reported by operators on W-2/G-1 completion filings (RRC wellbore records). Depths are measured depth; names appear as filed. Subsea = reported elevation − measured depth (negative = below sea level; vertical wellbores only). View filings & logs at RRC ↗

Perforations (2)

Interval	Type
8,966–9,068 ft	Perforated
10,006–10,192 ft	Perforated

Casing (5)

Size	Set Depth	Cement
12.75"	425 ft	400 sx
8.625"	4,515 ft	500 sx
2"	8,784 ft	—
2"	9,761 ft	—
5.5"	10,250 ft	850 sx

Permit History (2)

#91357 Recompletion Final Completion

LYNCH · 10,250 ft

1980-09-03

#35046 Drill

LYNCH · 10,400 ft

1978-10-19

Applications (2)

#91357 A COX, JOHN L.

received 1980-09-03

#35046 A COX, JOHN L.

received 1978-10-19

Records & Logs

5 completion filings on record.

W-2/G-1 1987-01-06

W-2/G-1 1986-07-16

W-2/G-1 1986-09-03

W-2/G-1 1980-09-10

W-2/G-1 1979-02-02

Completion packets + logs ↗ Wellbore filings ↗

Completion packets open directly (post-2011 filings include attached logs). Log images and the UL library can't be deep-linked — clicking copies the API for you to paste.

No GPS coordinates yet

Coordinates come from the RRC GIS backfill and usually appear within days of permit issuance. Located in UPTON County.

Well Details

Well Number: 1
Max Depth: 10,400 ft
Drill Type: Vertical
County: UPTON
District: 7
Operator: COX JOHN L.
Completed: 1979-01-15

Operator

Name: COX, JOHN L
Location: MIDLAND
P-5 Status: Inactive (filed 2003-03-21)
Cum Oil (all leases): 15,795,687 bbl
Cum Gas (all leases): 2,577,420 mcf
Total Permits: 1,123