WELL · 42-163-33406 · DISTRICT 1
Calkins-Kothmann Unit No. 2 #1
Frio County · Backdraft (Olmos) field · Directional
Calkins-Kothmann Unit NO. 2 #1 (API 42-163-33406) is a plugged well in Frio County, plugged January 22, 2020, last operated by Javelin Energy Partners Mgmt LLC.
The RRC has issued 2 drilling permits (amended once) between 2010 and 2014, permitted to 8,240 ft.
It was permitted by EF Energy, L.L.C. and has since transferred to Javelin Energy Partners Mgmt LLC on the wellbore schedule.
Completion filings report 3 formation tops, including Olmos, Eagle Ford, Buda.
Its 2 leases have reported 75.4K barrels of oil and 248 mcf of gas since March 2010, last reporting in May 2024. The leases carry 2 wells, so these are lease totals, not this well alone.
Operator of record
Javelin Energy Partners Mgmt LLC
Permitted by EF Energy, L.L.C.; the EWA schedule now lists a different operator.
Houston, TX · P-5 Y, filed Jan 4, 2026 · 233 permits on file · (888) 973-7780
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Javelin Energy Partners Mgmt LLC |
| Production reports | Venado Operating Company LLCthrough Apr 2019 |
| Latest permit | EF Energy, L.L.C.Mar 19, 2014 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 8,240
- total depth, ft
- 3
- permits on file
- Mar 19, 2014
- last permit issued
- Oct 29, 2013
- completed
- 75.4K
- cumulative oil, bbl
- 248
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Mar 2010 THROUGH May 2024
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Oct 29, 2013
- Shut in
- —
- Plugged
- Jan 22, 2020
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 |
|---|---|---|---|---|---|---|
| Calkins-Kothmann Unit No. 2 O-1-17606 | Backdraft (Olmos) | Javelin Energy Partners Mgmt LLC | 1 | 67.3K | 248 | Jan 2011 – May 2024 |
| Calkins-Kothmann O-1-15201 | Pearsall (Austin Chalk) | Venado Operating Company LLC | 1 | 8.06K | 0 | Mar 2010 – Jul 2020 |
No volumes reported on these leases in the last three years.
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Manti Exploration Operating LLCApr 2010 → Dec 2010
- 2EF Energy, L.L.C.Jan 2011 → Sep 2014
- 3Cabot Oil & Gas CorporationOct 2014 → Jan 2018
- 4Venado Operating Company LLCFeb 2018 → Apr 2019
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 779725-99 | Recompletion | EF Energy, L.L.C. | Feb 13, 2014 | Mar 19, 2014 | Jan 12, 2011 | 7,445 |
| 690394-98 | Drill | Manti Exploration Operating LLC | Jul 19, 2010 | Feb 5, 2010 | Feb 5, 2010 | 8,240 |
| 690394-99 | Drill | Manti Operating Company | Jan 27, 2010 | Feb 5, 2010 | Feb 5, 2010 | 8,200 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-1-15201 | — | — | — | — |
| — | — O-1-17606 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 443 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Olmos | 5,782 | -5,339 |
| Olmos | 5,787 | -5,344 |
| Eagle Ford | 7,819 | -7,376 |
| Eagle FordEAGLEFORD | 7,819 | -7,376 |
| Eagle FordEAGLEFORD | 7,825 | -7,382 |
| Buda | 7,985 | -7,542 |
| Buda | 7,991 | -7,548 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 5,804 | 5,816 | Perforated |
| 5,804 | 5,830 | Perforated |
| 7,525 | 7,538 | Perforated |
| 7,550 | 7,570 | Perforated |
| 7,588 | 7,601 | Perforated |
| 7,639 | 7,648 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 835 | 12.25 | 313 S |
| 5.5 | 8,216 | 8.5 | 462 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 | Feb 18, 2015 | Jul 19, 2014 | — |
| 00 | Jun 20, 2014 | Mar 25, 2014 | — |
| 00 | Oct 13, 2010 | Apr 28, 2010 | Yes |
| 00 | Oct 4, 2010 | — | — |
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 42-163-33406 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-163-33406 → 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/16333406, documented in the API reference.