TEXAS · WELLS · SUTTON COUNTY · CAUTHORN, MACK "129" LEASE · API 42-435-32066 · DISTRICT 6E
Cauthorn Mack 129 #2
Sutton County · Sawyer (Canyon) field · Producing · Vertical
Cauthorn Mack 129 #2 (API 42-435-32066) is a well in Sutton County operated by Upp Operating LLC, completed April 26, 1978 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued March 20, 1978, permitted to 6,819 ft.
It was permitted by Perlman, William and has since transferred to Upp Operating LLC on the wellbore schedule.
No lease production has been reported under this well’s leases.
Operator of record
Permitted by Perlman, William; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active (A)
- P-5 last filed
- Mar 6, 2026
- Permits on file
- 33
- Phone
- (713) 495-5300
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Upp Operating LLC |
| Production reports | Upp Operating, LLCthrough Apr 2026 |
| Latest permit | Perlman, WilliamMar 20, 1978 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 6,819
- total depth, ft
- 1
- permits on file
- Mar 20, 1978
- last permit issued
- Apr 26, 1978
- completed
- 0
- cumulative oil, bbl
- 275K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Apr 26, 1978
- 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.
Lease production
PDQ LEASE REPORTS · REPORTED THROUGH APR 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 |
|---|---|---|---|---|---|---|
| Cauthorn, Mack "129" G-9-76622 | Shurley Ranch (Canyon) | Upp Operating, LLC | 1 | 0 | 275K | Jan 1993 – Jul 2026 |
Gas, mcf lease total
Last 12 months 3,472 · prior 12 2,845(+22%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Graham Royalty, Ltd.Jan 1993 → Oct 1993
- 2Dreyfus, Louis Natural Gas CorpNov 1993 → Nov 2001
- 3Dominion Oklahoma Texas E&P, IncDec 2001 → Dec 2007
- 4Highmount Expl & Prod Texas LLCJan 2008 → Sep 2014
- 5Enervest Operating, L.L.C.Oct 2014 → Mar 2019
- 6Upp Operating, LLCApr 2019 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 20370-99 | Drill | Perlman, William | Mar 20, 1978 | Mar 20, 1978 | Apr 10, 1978 | 7,600 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Apr 26, 1978 | Cauthorn Mack 129 G-9-76622 | Sawyer (Canyon) | Upp Operating LLC | Producing | 6,819 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,810 | 6,819 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 1,051 | 11 | 500 S |
| 2.875 | 6,733 | — | — |
| 5.5 | 6,810 | 7.875 | 450 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 12, 1984 | May 26, 1978 | — |
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 42-435-32066 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-435-32066 → scanned completion filings
Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward). 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/43532066, documented in the API reference.