WELL · 42-435-33412 · DISTRICT 7
Mayer Ranch TTT #159
Sutton County · Sawyer (Canyon) field · Producing · Vertical
Mayer Ranch Ttt #159 (API 42-435-33412) is a well in Sutton County operated by Upp Operating LLC, completed March 13, 1988 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued December 23, 1987, permitted to 8,700 ft.
It was permitted by Sonora Southwest Partnership and has since transferred to Upp Operating LLC on the wellbore schedule.
Completion filings report 3 formation tops, including Canyon, Top Stray Sand, Strawn.
No lease production has been reported under this well’s leases.
Operator of record
Permitted by Sonora Southwest Partnership; the EWA schedule now lists a different operator.
Houston, TX · P-5 Y, filed Dec 4, 2025 · 33 permits on file · (817) 389-2729
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Upp Operating LLC |
| Production reports | Upp Operating, LLCthrough Apr 2026 |
| Latest permit | Sonora Southwest PartnershipDec 23, 1987 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 8,700
- total depth, ft
- 1
- permits on file
- Dec 23, 1987
- last permit issued
- Mar 13, 1988
- completed
- 0
- cumulative oil, bbl
- 295K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Mar 13, 1988
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active
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 |
|---|---|---|---|---|---|---|
| Mayer Ranch TTT G-9-127248 | Sawyer (Canyon) | Upp Operating, LLC | 1 | 0 | 295K | Jan 1993 – Jul 2026 |
Gas, mcf lease total
Last 12 months 2,943 · prior 12 4,089(-28%)
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 |
|---|---|---|---|---|---|---|
| 340622-99 | Drill | Sonora Southwest Partnership | Dec 23, 1987 | Dec 23, 1987 | — | 8,700 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-9-127248 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,297 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,669 | 7,241 | Perforated |
| 7,834 | 7,856 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 1,335 | 12.25 | 550 S |
| 4.5 | 8,311 | 7.875 | 550 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 | Jun 22, 1988 | May 16, 1988 | Yes |
| 00 | Jun 7, 1988 | — | — |
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 42-435-33412 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-435-33412 → 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/43533412, documented in the API reference.