WELL · 42-185-30433 · DISTRICT 3
McDuffie Unit #1 #1
Grimes County · Iola (Georgetown) field · Producing · Horizontal · Sidetrack
Mcduffie Unit #1 #1 (API 42-185-30433) is a horizontal well in Grimes County operated by Cml Exploration LLC, completed May 12, 1995 and listed as producing on the RRC schedule.
The RRC has issued 2 drilling permits (amended twice) between 1993 and 1995, permitted to 12,700 ft.
It was permitted by Patterson Petroleum, Inc. and has since transferred to Cml Exploration LLC on the wellbore schedule.
Completion filings report 4 formation tops, including Austin Chalk, Buda, Georgetown, Goergetown.
Its lease has reported 129K barrels of oil and 368K mcf of gas since May 1993, last reporting in July 2026.
Operator of record
Permitted by Patterson Petroleum, Inc.; the EWA schedule now lists a different operator.
- Based in
- Austin, TX
- P-5 status
- Active (A)
- P-5 last filed
- Oct 20, 2025
- Permits on file
- 514
- Phone
- (512) 328-8085
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | CML Exploration LLC |
| Production reports | CML Exploration, LLCthrough Apr 2026 |
| Latest permit | Patterson Petroleum, Inc.Apr 7, 1995 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 12,700
- total depth, ft
- 4
- permits on file
- Apr 7, 1995
- last permit issued
- May 12, 1995
- completed
- 129K
- cumulative oil, bbl
- 368K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · May 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- May 12, 1995
- 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 |
|---|---|---|---|---|---|---|
| McDuffie Unit #1 O-3-22148 | Iola (Georgetown) | CML Exploration, LLC | 1 | 129K | 368K | May 1993 – Jul 2026 |
Oil, barrels lease total
Last 12 months 372 · prior 12 525(-29%)
Gas, mcf lease total
Last 12 months 818 · prior 12 2,045(-60%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Patterson Petroleum, Inc.May 1993 → Feb 2000
- 2Patterson Petroleum LPMar 2000 → Jul 2007
- 3Patterson Petroleum LLCAug 2007 → Oct 2007
- 4CML Exploration, LLCNov 2007 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 434617-99 | Recompletion · sidetrack | Patterson Petroleum, Inc. | Apr 7, 1995 | Apr 7, 1995 | Apr 16, 1995 | 12,700 |
| 409671-97 | Drill | Patterson Petroleum, Inc. | May 21, 1993 | Mar 9, 1993 | Mar 14, 1993 | 12,700 |
| 409671-98 | Drill | Patterson Petroleum, Inc. | May 6, 1993 | Mar 9, 1993 | — | 11,900 |
| 409671-99 | Drill | Patterson Petroleum, Inc. | Mar 9, 1993 | Mar 9, 1993 | — | 12,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-3-22148 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 257 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Austin Chalk | 8,138 | -7,881 |
| Buda | 9,326 | -9,069 |
| Georgetown | 9,443 | -9,186 |
| Goergetown | 9,443 | -9,186 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,311 | 10,200 | Open hole |
| 9,476 | 12,510 | Open hole |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 1,660 | 12.25 | 540 S |
| 7 | 8,173 | 8.75 | 270 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 | Jul 28, 1995 | May 30, 1995 | — |
| 00 | Oct 11, 1993 | Aug 10, 1993 | Yes |
| 00 | Sep 29, 1993 | — | — |
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 42-185-30433 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-185-30433 → 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/18530433, documented in the API reference.