WELL · 42-503-40930 · DISTRICT 9
Knox Estate #4
Young County · Young County Regular field · Vertical
Knox Estate #4 (API 42-503-40930) is a plugged well in Young County, plugged June 25, 2021, last operated by Jdl Operating LLC.
The RRC has issued 2 drilling permits between 1999 and 2005, permitted to 5,400 ft.
It was permitted by Lindemann, James D. and has since transferred to Jdl Operating LLC on the wellbore schedule.
Completion filings report 4 formation tops, including Caddo, Conglomerate, Marble Falls, Mississippian.
Its 3 leases have reported 45.4K barrels of oil and 83K mcf of gas since January 1993, last reporting in July 2026. The leases carry 5 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Lindemann, James D.; the EWA schedule now lists a different operator.
Holliday, TX · P-5 Y, filed Nov 4, 2025 · 48 permits on file · (940) 691-1344
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | JDL Operating LLC |
| Production reports | JDL Operating, LLCthrough Apr 2026 |
| Latest permit | Lindemann, James D.Mar 16, 2005 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 5,400
- total depth, ft
- 2
- permits on file
- Mar 16, 2005
- last permit issued
- Aug 12, 1999
- completed
- 45.4K
- cumulative oil, bbl
- 83K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Aug 12, 1999
- Shut in
- —
- Plugged
- Jun 25, 2021
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 3 leases this well is completed on; they carry 5 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Knox Estate O-13-26934 | Young County Regular | JDL Operating, LLC | 3 | 44.7K | 21 | Jan 1993 – Jul 2026 |
| Knox Estate O-13-33515 | Clark (Marble Falls) | JDL Operating, LLC | 1 | 745 | 0 | Feb 2016 – Oct 2021 |
| Knox Estate G-13-209732 | Clark (Marble Falls) | JDL Operating, LLC | 1 | 0 | 83K | Mar 2005 – Feb 2016 |
Oil, barrels lease total
Last 12 months 292 · prior 12 281(+4%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Ramco Oil & Gas, Inc.Jan 1993 → Jan 1994
- 2Lindemann, James D.Feb 1994 → Mar 2007
- 3JDL Operating, LLCApr 2007 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 558928-99 | Recompletion | Lindemann, James D. | Mar 11, 2005 | Mar 16, 2005 | — | 5,400 |
| 482273-99 | Drill | Lindemann, James D. | Jan 26, 1999 | Jan 26, 1999 | Jan 27, 1999 | 5,400 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-13-209732 | — | — | — | — |
| — | — O-13-26934 | — | — | — | — |
| — | — O-13-33515 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Download CSV →
| Formation | MD ft |
|---|---|
| Caddo | 4,276 |
| Conglomerate | 4,680 |
| Marble Falls | 4,698 |
| MississippianMISSISSIPPI | 5,160 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 4,740 | 4,750 | Perforated |
| 5,159 | 5,170 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 12.25 | 560 | 8.625 | 300 S |
| 8.625 | 560 | 12.25 | 300 S |
| 7.875 | 5,159 | 4.5 | 200 S |
| 4.5 | 5,159 | 7.875 | 200 S |
| 4.5 | 5,160 | 7.875 | 200 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 9, 2016 | Apr 27, 2016 | — |
| 00 | Sep 29, 2005 | Mar 24, 2005 | Yes |
| 00 | Aug 2, 2005 | — | — |
| 00 | Sep 17, 1999 | Sep 2, 1999 | Yes |
| 00 | Sep 9, 1999 | — | — |
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 42-503-40930 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-503-40930 → 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/50340930, documented in the API reference.