WELL · 42-105-35491 · DISTRICT 7
Shannon J. M. Estate -C- #5
Crockett County · Shannon (San Andres) field · Vertical
Shannon J. M. Estate -C- #5 (API 42-105-35491) is a well in Crockett County operated by Sundown Energy LP, completed April 20, 1990.
The RRC has issued one drilling permit, issued January 14, 1988, permitted to 2,600 ft.
It was permitted by Cox, Robert G. & Associates,Inc. and has since transferred to Sundown Energy LP on the wellbore schedule.
Completion filings report 4 formation tops, including Soma, Queen, B/Anhydrite, San Andres.
Its 2 leases have reported 57.1K barrels of oil and 15 mcf of gas since January 1993, last reporting in July 2026. The leases carry 80 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Cox, Robert G. & Associates,inc.; the EWA schedule now lists a different operator.
Dallas, TX · P-5 Y, filed May 4, 2026 · 300 permits on file · (866) 580-2434
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Sundown Energy LP |
| Production reports | Clark Oil Co.through Apr 2026 |
| Latest permit | Cox, Robert G. & Associates,inc.Jan 14, 1988 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 2,600
- total depth, ft
- 1
- permits on file
- Jan 14, 1988
- last permit issued
- Apr 20, 1990
- completed
- 57.1K
- cumulative oil, bbl
- 15
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Apr 20, 1990
- 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 80 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Shannon Waterflood Unit O-9-17487 | Shannon (San Andres) | Clark Oil Co. | 74 | 50.4K | 0 | Jun 2011 – Jul 2026 |
| Shannon, J. M., Estate -C- O-9-3502 | Shannon (San Andres) | Sundown Energy LP | 6 | 6.73K | 15 | Jan 1993 – May 2012 |
Oil, barrels lease total
Last 12 months 4,035 · prior 12 3,238(+25%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Cox, Robert G. & Associates,inc.Jan 1993 → Mar 1993
- 2Hawkeye Transmission CompanyMay 1993 → Feb 2000
- 3Sundown Energy, Inc.Apr 2004 → Jan 2005
- 4Sundown Energy LPFeb 2005 → Jun 2017
- 5Clark Oil Co.Jul 2017 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 341050-99 | Drill | Cox, Robert G. & Associates,inc. | Jan 6, 1988 | Jan 14, 1988 | — | 2,600 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-9-3502 | — | — | — | — |
| — | — O-9-17487 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,632 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Soma | 1,946 | 686 |
| Queen | 2,010 | 622 |
| B/Anhydrite | 2,134 | 498 |
| San Andres | 2,260 | 372 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 2,360 | 2,436 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 811 | 12.5 | 365 S |
| 5.5 | 2,525 | 7.875 | 308 S |
| 5.5 | 2,530 | 7.875 | 308 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 | May 8, 2012 | Apr 26, 1990 | — |
| 00 | May 18, 1990 | Apr 26, 1990 | — |
| 00 | Aug 21, 1989 | Jun 21, 1989 | Yes |
| 00 | Aug 12, 1989 | — | — |
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 42-105-35491 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-105-35491 → 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/10535491, documented in the API reference.