TEXAS · WELLS · MARTIN COUNTY · CARLTON "44" LEASE · API 42-317-35226 · DISTRICT 7B
Carlton 44 #1
Martin County · Spraberry (Trend Area) field · Producing · Vertical
- Fields on the latest permit · any of 3
- Hill Ranch (Miss) · Mon Bak (Strawn) · Spraberry (Trend Area)
- Not one formation; the well must be completed in one of them, and no target formation is stated.
Carlton 44 #1 (API 42-317-35226) is a well in Martin County operated by Diamondback E&P LLC, completed October 15, 2013 and listed as producing on the RRC schedule.
The RRC has issued 2 drilling permits between 2008 and 2013, permitted to 10,843 ft.
It was permitted by Endeavor Energy Resources L.P. and has since transferred to Diamondback E&P LLC on the wellbore schedule.
Completion filings report 6 formation tops, including Yates, Spraberry, Wolfcamp, Pennsylvanian.
Its lease has reported 36.4K barrels of oil and 53.4K mcf of gas since September 2008, last reporting volume in August 2026.
Operator of record
Permitted by Endeavor Energy Resources L.P.; the EWA schedule now lists a different operator.
- Based in
- Midland, TX
- P-5 status
- Active (A)RRC P-5 file of Oct 22, 2026
- P-5 last filed
- May 4, 2026
- Permits on file
- 5,263
- Phone
- (432) 221-7400
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Diamondback E&P LLC |
| Production reports | Diamondback E&P LLCthrough Aug 2026 |
| Latest permit | Endeavor Energy Resources L.P.Nov 8, 2013 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 10,843
- total depth, ft
- 2
- permits on file
- Nov 8, 2013
- last permit issued
- Oct 15, 2013
- completed
- 36.4K
- cumulative oil, bbl
- 53.4K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · SEP 2008 THROUGH AUG 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Oct 15, 2013
- 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.
Wells nearby
Every well with a location on file around this well, in any state, nearest first.
Texas locations come from drilling permits, so most older Texas wells have none and are not listed.
Lease production
PDQ LEASE REPORTS · REPORTED THROUGH AUG 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 |
|---|---|---|---|---|---|---|
| Carlton "44" O-10-38988 | Spraberry (Trend Area) | Diamondback E&P LLC | 1 | 36.4K | 53.4K | Sep 2008 – Aug 2026 |
Oil, barrels lease total
Last 12 months 661 · prior 12 782(-15%)
Gas, mcf lease total
Last 12 months 0 · prior 12 146(-100%)
Wells named Carlton 44
Diamondback E&P LLC's other wells filed under this lease name in Martin County, newest permit first. The RRC gives a gas well its own lease number, so the name is what joins the wells of a unit.
Loading the lease's wellsChain of custody
Operator on the lease's P-4
Each operator named on the P-4 filings for this well's lease (a gas well is its own lease), from the date its filing took effect. The P-4 is filed by lease, so a date before the well was drilled is the lease's.
| Operator | From | To |
|---|---|---|
| Diamondback E&P LLC | Jan 1, 2025 | today |
| Endeavor Energy Resources L.P. | Sep 12, 2008 | Jan 1, 2025 |
Reporting production
Every operator that reported production on this well's lease, in order.
- 1Endeavor Energy Resources L.P.Sep 2008 → Dec 2024
- 2Diamondback E&P LLCJan 2025 → Aug 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 772275-99 | Recompletion | Endeavor Energy Resources L.P. | Oct 22, 2013 | Nov 8, 2013 | Oct 13, 2013 | 10,843 |
| 658543-99 | Drill | Endeavor Energy Resources L.P. | Apr 1, 2008 | Apr 12, 2008 | May 11, 2008 | 12,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Oct 15, 2013 | Carlton 44 O-10-38988 | Spraberry (Trend Area) | Diamondback E&P LLC | Producing | 10,843 |
| Oct 15, 2013 | Carlton 44 O-10-38988 | Spraberry (Trend Area) | Diamondback E&P LLC | Producing | 10,843 |
Formation tops
As filed on W-2/G-1. Subsea from 2,646 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Yates | 2,075 | 571 |
| Spraberry | 6,875 | -4,229 |
| WolfcampWOLFCAMP LIME | 8,450 | -5,804 |
| PennsylvanianPENN LIME | 9,500 | -6,854 |
| StrawnSTRAWN LIME | 9,950 | -7,304 |
| MississippianLOWER MISS LIME | 10,450 | -7,804 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,887 | 9,791 | Perforated |
| 6,887 | 10,700 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 12.75 | 360 | 17.5 | 350 S |
| 8.625 | 4,535 | 11 | 700 S |
| 4.5 | 10,843 | 7.875 | 1,555 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. The record date is the RRC's own date on the record, not the day the report was filed: 462,034 of the state's filings carry 1984-01-12. About these reports →
| Suffix | RRC record date | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Sep 30, 2014 | Jan 31, 2014 | — |
| 00 | Jan 30, 2009 | Oct 24, 2008 | Yes |
| 00 | Jan 6, 2009 | — | — |
Well logs
1 log loaded from the RRC's log index, the latest received Jul 2, 2009. Neutron.
Click a log to get its files from the RRC (free account). It opens in a new tab on the RRC's log search for this well, which lists each file to view or download; the RRC has no address for a single file.
| Logas described | Files | Intervalft, as filed | Datereceived | SizeMB |
|---|---|---|---|---|
| NEUTRON POROSITYSpans Yates, Spraberry, Wolfcamp, Pennsylvanian, Strawn, Mississippian | TIFF | 5,500 to 10,783 | Jul 2, 2009run Jun 11, 2008 | 3.27 |
"Spans" is by this well's own filed formation tops: a formation runs from its top to the next deeper top filed, and the deepest runs to the bottom of the log. Depths are measured along the wellbore, so on a horizontal the lateral counts in the formation it was landed in.
These are the logs loaded into Petrora from the Railroad Commission's inventories, not necessarily every log run on the well. The RRC holds the files; each opens from its log search for the well. The kind is the RRC's description of the log; the interval is the one filed for it.
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 42-317-35226 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-317-35226 → scanned completion filings
The logs loaded for this well are under Well logs, with the RRC's log search for it. The University Lands library has no per-well link: then paste it into its 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/31735226, documented in the API reference.