42-461-31396

Final Completion

JAX

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

Permits

Max Depth

10,400 ft

First Permit

1979-01-04

Latest Activity

1984-04-30

Lifespan

5 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

1979-02-12

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.

Oil

production & DCA →

Formation Tops (6) Elevation 2,611 ft (GR)

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
REDBEDS	410 ft	+2,201 ft
UPPER SPRABERRY (Spraberry)	6,650 ft	-4,039 ft
LOWER SPRABERRY (Spraberry)	7,360 ft	-4,749 ft
DEAN	8,100 ft	-5,489 ft
PBTD	8,400 ft	-5,789 ft
BEND	10,145 ft	-7,534 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 (4)

Interval	Type
6,658–6,960 ft	Perforated
7,361–7,797 ft	Perforated
8,117–8,309 ft	Perforated
10,146–10,201 ft	Perforated

Casing (4)

Size	Set Depth	Cement
12.75"	474 ft	450 sx
8.625"	4,510 ft	500 sx
2"	9,583 ft	—
5.5"	10,250 ft	1,100 sx

Permit History (3)

#238387 Recompletion Final Completion

JAX · 8,400 ft

1984-04-30

#49432 Drill Final Completion

JAX · 10,400 ft

1979-05-07

#40212 Drill Final Completion

JAX · 10,400 ft

1979-01-04

Applications (3)

#238387 A COX, JOHN L.

received 1984-03-14

#49432 A COX, JOHN L.

received 1979-05-07

#40212 A COX, JOHN L.

received 1979-01-04

Records & Logs

3 completion filings on record.

W-2/G-1 1984-05-14

W-2/G-1 1979-02-26

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: 1979-02-12

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