WELL · 42-135-35629 · DISTRICT 8
Ratliff H #1
Ector County · Headlee N. (Devonian) field · Vertical
Ratliff H #1 (API 42-135-35629) is a well in Ector County operated by Cog Operating LLC, completed May 9, 1988.
The RRC has issued 3 drilling permits between 1987 and 1988, permitted to 14,000 ft.
It was permitted by Sun Expl. & Prod. CO.-Midland and has since transferred to Cog Operating LLC on the wellbore schedule.
Completion filings report 5 formation tops, including Wichita-Albany, Devonian, Fusselman, Simpson.
Its 2 leases have reported 21.7K barrels of oil and 588K mcf of gas since January 1993, last reporting in July 2026. The leases carry 2 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Sun Expl. & Prod. Co.-Midland; the EWA schedule now lists a different operator.
Midland, TX · P-5 Y, filed May 4, 2026 · 4,568 permits on file · (432) 853-2355
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | COG Operating LLC |
| Production reports | Diamondback E&P LLCthrough Apr 2026 |
| Latest permit | Sun Expl. & Prod. Co.-MidlandApr 20, 1988 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 14,000
- total depth, ft
- 3
- permits on file
- Apr 20, 1988
- last permit issued
- May 9, 1988
- completed
- 21.7K
- cumulative oil, bbl
- 588K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- May 9, 1988
- Shut in
- —
- Plugged
- —
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 2 leases this well is completed on; they carry 2 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Ratliff "H" G-10-273204 | Headlee, N. (Devonian) | Diamondback E&P LLC | 1 | 0 | 71.2K | Aug 2013 – Jul 2026 |
| Ratliff "H" O-10-31558 | Headlee, N. (Devonian) | COG Operating LLC | 1 | 21.7K | 517K | Jan 1993 – Sep 2014 |
Gas, mcf lease total
Last 12 months 19,389 · prior 12 158(+12172%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Antelope Production Co.Jan 1993 → May 1993
- 2Amoco Production CompanyJun 1993 → Feb 1997
- 3Altura Energy Ltd.Mar 1997 → Feb 1998
- 4Union Pacific Resources CompanyMar 1998 → Jan 2001
- 5Rme Petroleum CompanyFeb 2001 → Nov 2002
- 6Anadarko E&P Company LPDec 2002 → Nov 2004
- 7Merit Energy CompanyDec 2004 → Jun 2010
- 8PDC-WV-Co CorporationAug 2010 → Aug 2010
- 9PDC EnergySep 2010 → Jan 2012
- 10COG Operating LLCFeb 2012 → Jan 2019
- 11Torch Operating LLCFeb 2019 → Jun 2020
- 12Firebird Energy LLCJul 2020 → Nov 2022
- 13Diamondback E&P LLCDec 2022 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 345470-99 | Recompletion | Sun Expl. & Prod. Co.-Midland | Apr 20, 1988 | Apr 20, 1988 | — | 13,720 |
| 341665-99 | Recompletion | Sun Expl. & Prod. Co.-Midland | Jan 20, 1988 | Jan 20, 1988 | — | 13,720 |
| 335121-99 | Drill | Sun Expl. & Prod. Co.-Midland | Aug 26, 1987 | Aug 26, 1987 | Sep 16, 1987 | 14,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-10-273204 | — | — | — | — |
| — | — O-10-31558 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,995 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Wichita-AlbanyWICHITA ALBANY | 7,815 | -4,820 |
| Devonian | 11,876 | -8,881 |
| DevonianUPPER DEVONIAN | 12,150 | -9,155 |
| DevonianLOWER DEVONIAN | 12,243 | -9,248 |
| Fusselman | 12,806 | -9,811 |
| Simpson | 13,145 | -10,150 |
| Ellenburger | 13,600 | -10,605 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,820 | 7,894 | Perforated |
| 12,082 | 12,211 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 457 | 17.5 | 500 S |
| 9.625 | 6,000 | 12.25 | 2,600 S |
| 5.5 | 12,391 | 8.75 | 1,625 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 | Sep 2, 2014 | Oct 14, 2013 | — |
| 00 | Jun 17, 1988 | May 20, 1988 | — |
| 00 | Feb 12, 1988 | Jan 29, 1988 | — |
| 00 | Feb 6, 1988 | — | — |
| 00 | Jan 15, 1988 | Jan 4, 1988 | Yes |
| 00 | Jan 9, 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 42-135-35629 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-135-35629 → scanned completion filings
Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward) and the University Lands library. 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/13535629, documented in the API reference.