WELL · 42-135-43573 · DISTRICT 8
Ratliff K Unit #4407LH
Ector County · Spraberry (Trend Area) field · Producing · Horizontal
Ratliff K Unit #4407LH (API 42-135-43573) is a horizontal well in Ector County operated by Cog Operating LLC, completed December 3, 2018 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued July 18, 2018, permitted to 9,100 ft.
Completion filings report 10 formation tops, including Santa Rosa, Yates, San Andres, Grayburg.
Its lease has reported 1.7M barrels of oil and 7.31M mcf of gas since April 2018, last reporting in July 2026. The lease carries 6 wells, so these are lease totals, not this well alone.
Operator of record
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 | COG Operating LLCthrough Apr 2026 |
| Latest permit | COG Operating LLCJul 18, 2018 |
- 9,100
- total depth, ft
- 1
- permits on file
- Jul 18, 2018
- last permit issued
- Dec 3, 2018
- completed
- 1.7M
- cumulative oil, bbl
- 7.31M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Apr 2018 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Dec 3, 2018
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: X
Surface location
31.926954, -102.323512
OpenStreetMap → · Google Maps →
Permit surface location from the RRC GIS record, in Ector County.
Lease production
PDQ LEASE REPORTS · REPORTED THROUGH APR 2026
Texas reports oil by lease, not by well. These are the lease this well is completed on; they carry 6 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Ratliff K Unit O-10-50476 | Spraberry (Trend Area) | COG Operating LLC | 6 | 1.7M | 7.31M | Apr 2018 – Jul 2026 |
Gas, mcf lease total
Last 12 months 1,192,779 · prior 12 899,506(+33%)
Oil, barrels lease total
Last 12 months 83,039 · prior 12 85,024(-2%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1COG Operating LLCMay 2018 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 837746-99 | Drill | COG Operating LLC | Mar 20, 2018 | Jul 18, 2018 | Aug 11, 2018 | 9,100 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-50476 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,957 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Santa RosaSANTA ROSA BASE | 1,350 | 1,607 |
| Yates | 2,000 | 957 |
| San AndresSAN ANDRES - HIGH FLOWS, H2S, CO | 3,400 | -443 |
| Grayburg | 3,550 | -593 |
| Seven Rivers | 3,970 | -1,013 |
| Queen | 4,253 | -1,296 |
| Holt | 5,000 | -2,043 |
| Glorieta | 5,581 | -2,624 |
| Tubb | 6,100 | -3,143 |
| Clear ForkCLEARFORK | 7,357 | -4,400 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,274 | 19,250 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 1,690 | 17.5 | 1,335 S |
| 9.625 | 8,305 | 12.25 | 2,250 S |
| 5.5 | 19,359 | 8.5 | 1,995 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 | Aug 2, 2019 | Mar 8, 2019 | Yes |
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 42-135-43573 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-135-43573 → 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.
Nearby wells and their tops
NEAREST 8 LOCATED WELLS WITH TOPS · WITHIN 16 KM
Draw a cross-section
This well's tops beside its 5 nearest neighbours, subsea-aligned so they line up regardless of surface terrain.
Ratliff K Unit42-135-43574
0.0 KM · COG Operating LLC · Section with this well →
| Santa Rosa | 1,350 | 1,607 |
| Yates | 2,000 | 957 |
| San Andres | 3,400 | -443 |
| Grayburg | 3,550 | -593 |
| Seven Rivers | 3,970 | -1,013 |
| Queen | 4,253 | -1,296 |
| Holt | 5,000 | -2,043 |
| Glorieta | 5,581 | -2,624 |
10 TOPS · FIRST 8
Ratliff K Unit42-135-43580
0.1 KM · COG Operating LLC · Section with this well →
| Santa Rosa | 1,352 | 1,606 |
| Yates | 2,002 | 956 |
| San Andres | 3,403 | -445 |
| Grayburg | 3,551 | -593 |
| Seven Rivers | 3,971 | -1,013 |
| Queen | 4,246 | -1,288 |
| Holt | 5,006 | -2,048 |
| Glorieta | 5,574 | -2,616 |
10 TOPS · FIRST 8
Ratliff K Unit42-135-43579
0.2 KM · COG Operating LLC · Section with this well →
| Santa Rosa | 1,058 | 1,901 |
| Yates | 3,088 | -129 |
| Seven Rivers | 3,970 | -1,011 |
| Queen | 4,246 | -1,287 |
| Grayburg | 4,276 | -1,317 |
| San Andres | 5,065 | -2,106 |
| Holt | 5,665 | -2,706 |
| Glorieta | 6,365 | -3,406 |
10 TOPS · FIRST 8
Ratliff K Unit42-135-43533
0.3 KM · COG Operating LLC · Section with this well →
| Yates | 2,000 | 952 |
| San Andres | 3,400 | -448 |
| Grayburg | 3,550 | -598 |
| Seven Rivers | 3,970 | -1,018 |
| Queen | 4,256 | -1,304 |
| Holt | 5,000 | -2,048 |
| Glorieta | 5,584 | -2,632 |
| Tubb | 6,100 | -3,148 |
10 TOPS · FIRST 8
Ratliff K Unit42-135-43534
0.3 KM · COG Operating LLC · Section with this well →
| Santa Rosa | 1,350 | 1,602 |
| Yates | 2,000 | 952 |
| Grayburg | 3,550 | -598 |
| Seven Rivers | 3,970 | -1,018 |
| Queen | 4,256 | -1,304 |
| Holt | 5,000 | -2,048 |
| San Andres | 5,075 | -2,123 |
| Glorieta | 5,584 | -2,632 |
10 TOPS · FIRST 8
Ratliff I Unit42-135-43532
0.3 KM · COG Operating LLC · Section with this well →
| Santa Rosa | 1,350 | 1,602 |
| Yates | 2,000 | 952 |
| Grayburg | 3,550 | -598 |
| Seven Rivers | 3,970 | -1,018 |
| Queen | 4,256 | -1,304 |
| Holt | 5,000 | -2,048 |
| San Andres | 5,075 | -2,123 |
| Glorieta | 5,584 | -2,632 |
10 TOPS · FIRST 8
Ratliff J Unit42-135-43767
1.0 KM · COG Operating LLC · Section with this well →
| Santa Rosa | 1,350 | 1,595 |
| Yates | 3,139 | -194 |
| Seven Rivers | 3,380 | -435 |
| Queen | 4,059 | -1,114 |
| Grayburg | 4,501 | -1,556 |
| Holt | 5,000 | -2,055 |
| San Andres | 5,096 | -2,151 |
| Glorieta | 5,640 | -2,695 |
10 TOPS · FIRST 8
Headlee 5G42-135-44018
1.1 KM · Ovintiv USA Inc. · Section with this well →
| Yates | 3,148 | -216 |
| Grayburg | 4,542 | -1,610 |
| San Andres | 4,897 | -1,965 |
| Clear Fork | 7,370 | -4,438 |
| Spraberry | 8,170 | -5,238 |
| Queen | — | |
| Holt | — | |
| Santa Rosa | — |
10 TOPS · FIRST 8
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/13543573, documented in the API reference.