OPERATORS · TEXAS · P-5 NUMBER 902609
WB Mullin Operating LLC
- P-5 status
- Active (A)
- P-5 last filed
- Oct 27, 2025
- Based in
- Graham, TX
WB Mullin Operating LLC has filed no drilling permits in the past 12 months; its most recent permit was issued June 20, 2018.
The RRC wellbore file lists 77 wells under its operatorship (44 producing, 3 shut in).
Lease reports credit it with 10.8K barrels of oil and 36.9K mcf of gas in the 12 months reported through April 2026, up 60% on the year before.
It holds 14 active disposal or injection permits, injecting 330K barrels in the 12 months reported through June 2025.
12 drilling permits have been issued to this operator number since 2013; its P-5 organization report was last filed October 27, 2025.
- 0
- permits, last 12 months
- —
- vs prior 12 months (0)
- 0
- counties, 12 months
- 44
- producing wells, of 77 of record
- 36
- leases it reports
- —
- horizontal, 12 months
WINDOWS ON THE RRC ISSUE DATE · COMPUTED NOV 8, 2026
From permit to spud
FROM THE DATES ON ITS W-1 PERMITS · ALL TIME
A permit is a plan, not a well. These figures count only permits old enough to have spudded, six months and more, and read the spud, cancel, and expiry dates the RRC records on each one.
- 75%
- spud rate · 9 of 12 mature permits
- 151
- median days permit to spud · middle half 15–302
- 0
- spuds, last 180 days
- 0%
- canceled · 0 permits
- 3
- expired undrilled
- 2
- permits a year over 6 active years
Permits issued by month
LAST 60 MONTHS · BY ISSUE DATE
Last 12 months 0 · prior 12 0
Counties
Counties by permits in the last 12 months, with all-time permits and current wells of record there.
| County | 12 mo | All time | Wells | Last |
|---|---|---|---|---|
| Throckmorton county → | — | 10 | 31 | Jun 20, 2018 |
| Young county → | — | 2 | 19 | Mar 20, 2013 |
All 12 permits, searchable → · Leases it reports → · On the map →
Formations in its completed wells
Tops reported on completion filings for wells it operates. RRC wellbore file. About tops →
| Formation | Wells | Permitted last 3 yrs |
|---|---|---|
| Gunsight | 2 | 0 |
Production by month
PDQ LEASE REPORTS · REPORTED THROUGH APR 2026
Barrels on leases where this operator filed the production report. Lease-level by design; the latest months are revised upward as late reports arrive. How production is reported →
- 10.8K
- bbl oil, last 12 reported months
- +60%
- vs the 12 months before
- 36.9K
- mcf gas incl. casinghead, last 12
- 40.2K
- bbl oil since reporting began
12 months through Apr 2026 36,895 · prior 12 61,405(-40%)
WB Mullin Operating LLC: Gas by month.
Beyond the permit record
RRC wellbore file
Wells of record
How it got them
Each count opens the wells it counts. Acquired means the well's permit names a different operator than the schedule does today; wells it permitted that others now run are in its permit history, marked with who runs them now. Transfers and operator numbers →
RRC UIC permits · H-10 reported volumes
Disposal and injection
- 3.93K
- permitted bbl/day, active
- 330K
- bbl injected, last 12 reported months
- Jun 2025
- reported through
By county
| Young | 5 active | 1.8K bbl/d |
| Throckmorton | 8 active | 1.38K bbl/d |
| Jack | 1 active | 750 bbl/d |
All 19 permits, with volumes → · On the map →
Permitted volume is a ceiling, not throughput. How to read it →
Permit types
Last 12 months against the prior 12, and all time. A type opens the permit history filtered to it. What the types mean →
| Type | 12 mo | Prior 12 | All time |
|---|---|---|---|
| Drill | 0 | 0 | 12 |
Fields
RRC regulatory fields with the most wells of record under this operator. The field opens its page; the count opens this operator's wells in it.
| Field | Wells | Producing |
|---|---|---|
| Throckmorton County Regular89812001 | 30 | 17 |
| Woodkirk (Strawn)98535666 | 9 | 6 |
| Serendipity (Strawn)82268500 | 8 | 4 |
| Langston-Kleiner (Strawn)51982332 | 6 | 0 |
| Jack County Regular (Gas)45274025 | 6 | 6 |
| Bartons Chapel S. (Strawn 3600)5974550 | 4 | 3 |
| Serendipity (Congl)82268200 | 3 | 1 |
| Palo Pinto Co. Reg. (Gas)68707333 | 3 | 2 |
| Young County Regular99480001 | 1 | 0 |
| Brad SW. (Big Saline Congl.)11197500 | 1 | 1 |
| Garvey (3700)34076900 | 1 | 0 |
| Irwin (Mississippi)44780500 | 1 | 0 |
P-5 organization report
As registered with the RRC. About the P-5 →
- Registration
- Status Active (A)
- Last filed Oct 27, 2025
- Gas operatorOil operator
- Address
- PO Box 1925
- Graham, TX 76450
- (940) 549-0131
- Officers and agents
- Mullin, William B · Managing Member,member
- Palmour, Vicki · Filing Agent
Latest permits
NEWEST FIRST BY ISSUE DATE · FILED OR ON WELLS IT NOW OPERATES
About this data
Registration from the RRC P-5 organization report, refreshed weekly. Permits from the OGA049M master and daily daf420 files; wells of record from the EWA wellbore schedule; production from PDQ lease reports by the operator that filed them, through the statewide reported-through month; disposal from UIC permits and H-10 reports. Oil includes condensate from gas leases and gas includes casinghead gas from oil leases, as the RRC totals them. Summary figures are rebuilt nightly. Nothing is estimated.
Developers: this page as JSON is GET /v1/data/operators/tx/902609, documented in the API reference.