OPERATORS · RRC 925906  · P-5 STATUS Y

Williamson Drilling Co., Inc

Williamson Drilling CO., Inc has filed no drilling permits in the past 12 months; its most recent permit was issued April 21, 1992.

The RRC wellbore file lists 4 wells under its operatorship.

21 drilling permits have been issued to this operator number since 1984; its P-5 organization report was last filed January 11, 2001.

0
permits, last 12 months
—
vs prior 12 months (0)
0
counties, 12 months
0
producing wells, of 4 of record
2
leases it reports
—
horizontal, 12 months

WINDOWS ON THE RRC ISSUE DATE · COMPUTED OCT 29, 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.

33%
spud rate · 7 of 21 mature permits
7
median days permit to spud · middle half 4–32
0
spuds, last 180 days
0%
cancelled · 0 permits
14
expired undrilled
2
permits a year over 9 active years

Where

Counties by permits in the last 12 months, with all-time permits and current wells of record there.

County12 moAll timeWellsLast
Zavala county →—194Apr 21, 1992
Kinney county →—10Sep 3, 1987
Live Oak county →—10Apr 26, 1985

All 21 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 →

FormationWellsPermitted last 3 yrs
Escondido20
Wilcox20
Carrizo20
Olmos10

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 →

0
bbl oil, last 12 reported months
—
vs the 12 months before
0
mcf gas incl. casinghead, last 12
0
bbl oil since reporting began

No lease production reported under this operator number in the last three years.

Beyond the permit record

RRC wellbore file

Wells of record

4
on the schedule
0
producing
0
shut in
0
injection
0
temp. abandoned
4
plugged

How it got them

2
permitted itself
2
acquired from others
8
permitted, now run by others

Acquired means the well's permit names a different operator than the schedule does today. Transfers and operator numbers →

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 →

Type12 moPrior 12All time
Drill0018
Other003

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.

FieldWellsProducing
Gable (Olmos)3359540010
Lyles Ranch (Olmos)5596070010
Richard (Olmos)7639050010
Wildcat200110

P-5 organization report

As registered with the RRC. About the P-5 →

Registration
Status code Y
Last filed Jan 11, 2001
Address
P O Box 1508
Uvalde, TX 78802
Officers and agents
Williamson, John A. · Texas Resident Agent
Griffin, Dan · President
Williamson, John A. · Vice President
Griffin, Warren · Treasurer

Latest permits

NEWEST FIRST BY ISSUE DATE · FILED OR ON WELLS IT NOW OPERATES

PermitSeenIssuedOperatorCountyLease / wellDepthAPI
394849Apr 21, 1992Apr 21, 1992Williamson Drilling Co., Inc.ZavalaCaid #12,00050732157
335515Sep 3, 1987Sep 3, 1987Williamson Drilling Co., Inc.KinneyFrerich Jar #11,40027130227
325878Jan 28, 1987Jan 28, 1987Williamson Drilling Co., Inc.ZavalaCentury Oil & Gas #11,00050732203
303258Jun 16, 1986Jun 16, 1986Williamson Drilling Co., Inc.ZavalaWilliamson-Lyle, Lora #1A2,00050732194
300936Apr 8, 1986Apr 8, 1986Williamson Drilling Co., Inc.ZavalaLyles, Lora -A #52,00050731101
300784Apr 8, 1986Apr 8, 1986Williamson Drilling Co., Inc.ZavalaLyles, Lora #42,00050731041
293487Dec 10, 1985Dec 10, 1985Williamson Drilling Co., Inc.ZavalaDishman #22,00050732083
285972Sep 25, 1985Sep 25, 1985Williamson Drilling Co., Inc.ZavalaCaid #12,00050732157
280935Jul 24, 1985Jul 24, 1985Williamson Drilling Co., Inc.ZavalaRutledge #42,00050732150
280187Jul 15, 1985Jul 15, 1985Mueller Engineering Corp.ZavalaJones Unit #32,00050732149
279537Jul 8, 1985Jul 8, 1985Williamson Drilling Co., Inc.ZavalaPemberton #12,00050732145
273425Apr 26, 1985Apr 26, 1985Williamson Drilling Co., Inc.Live OakWhite #13,50029733576
267930Feb 27, 1985Feb 27, 1985Williamson Drilling Co., Inc.ZavalaRutledge #32,00050732107
265141Jan 25, 1985Jan 25, 1985Williamson Drilling Co., Inc.ZavalaWilliamson-Lyle, Lora #12,00050732101
256250Oct 31, 1984Oct 31, 1984Williamson Drilling Co., Inc.ZavalaMoore, W. D. #12,00050732087

Full permit history →

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 at the last vintage; disposal from UIC permits and H-10 reports. Summary figures are rebuilt nightly.

Developers: this page as JSON is GET /v1/data/operators/tx/925906, documented in the API reference.