Petrora

OPERATORS · RRC 306400  · P-5 STATUS Y

Gillring Oil Co

Fort Worth, TX

Watch this operator

Gillring Oil CO has filed no drilling permits in the past 12 months; its most recent permit was issued March 31, 1994.

The RRC wellbore file lists 65 wells under its operatorship.

115 drilling permits have been issued to this operator number since 1977; its P-5 organization report was last filed February 3, 1995.

0
permits, last 12 months
—
vs prior 12 months (0)
0
counties, 12 months
0
producing wells, of 65 of record
6
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.

39%
spud rate · 45 of 115 mature permits
19
median days permit to spud · middle half 6–34
0
spuds, last 180 days
0%
cancelled · 0 permits
70
expired undrilled
7
permits a year over 17 active years

Where

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

County12 moAll timeWellsLast
Nueces county →—7760Sep 19, 1991
Victoria county →—102Nov 1, 1993
Brooks county →—90Mar 4, 1987
Wharton county →—50Apr 1, 1993
Fisher county →—31Mar 13, 1979
Duval county →—20Mar 31, 1994
Knox county →—20Sep 24, 1980
Coke county →—11Jul 30, 1979
Colorado county →—10Jul 12, 1991
DE Witt county →—10Jul 6, 1992
Hidalgo county →—10Feb 22, 1978
Jackson county →—10Sep 14, 1992
McMullen county →—10Mar 31, 1994
San Patricio county →—10Aug 5, 1993

All 115 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
Frio210
Vicksburg180
Miocene (undifferentiated)10
Jackson10

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
23.4K
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

65
on the schedule
0
producing
0
shut in
0
injection
0
temp. abandoned
26
plugged

How it got them

15
permitted itself
3
acquired from others
26
permitted, now run by others

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

RRC UIC permits · H-10 reported volumes

Disposal and injection

0
active UIC permits of 1
0
permitted bbl/day, active
0
bbl injected, last 12 reported months
Jun 2025
reported through

By county

Nueces0 active0 bbl/d

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 →

Type12 moPrior 12All time
Drill0065
Recompletion0045
Reenter003
Other002

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
Agua Dulce (Dabney)83211540
Agua Dulce (Winfield -A-)83243030
Agua Dulce83200130
Agua Dulce (8300)83292030
Agua Dulce (8400)83293530
Agua Dulce (Frio 6860)83219020
Agua Dulce (5600)83262020
Agua Dulce (Comstock -A-)83207020
Agua Dulce (6800)83281020
Agua Dulce (7800)83289520
Agua Dulce (Comstock -B-)83207520
Brayton (Balzer Seg. Simmons)1154607620

P-5 organization report

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

Registration
Status code Y
Last filed Feb 3, 1995
Address
500 Throckmorton St Ste 2104
Fort Worth, TX 76102
Officers and agents
Canfield, Charles L. · President
Boening, Terry L. · Vice President
Crowsey, Charles M. · Vice President/Controller

Latest permits

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

PermitSeenIssuedOperatorCountyLease / wellDepthAPI
422615Mar 31, 1994Mar 31, 1994Gillring Oil CompanyMcMullenFagan, H.F. #57,82931180467
422614Mar 31, 1994Mar 31, 1994Gillring Oil CompanyDuvalHagist Ranch "A" #149,99013133181
417642Nov 1, 1993Nov 1, 1993Gillring Oil CompanyVictoriaSmith Unit #16,24046932885
415704Sep 23, 1993Sep 23, 1993Gillring Oil CompanyDuvalFoster, J. R. #458,01913131667
414578Aug 5, 1993Aug 5, 1993Gillring Oil CompanySan PatricioWelder, R. H. "H" #17,60040932426
410233Apr 1, 1993Apr 1, 1993Gillring Oil CompanyWhartonSorrel #13,40048133625
407500Dec 23, 1992Dec 23, 1992Gillring Oil CompanyVictoriaStubblefield, E. P. #16,81546932780
405243Oct 29, 1992Oct 29, 1992Gillring Oil CompanyWhartonCullers #13,50048133594
405070Oct 23, 1992Oct 23, 1992Gillring Oil CompanyWhartonSwanson #15,30048133593
404140Oct 9, 1992Oct 9, 1992Gillring Oil CompanyVictoriaStubblefield, E. P. #24,30046902138
404187Oct 8, 1992Oct 8, 1992Gillring Oil CompanyWhartonOtto Unit #15,10048133590
403101Sep 14, 1992Sep 14, 1992Gillring Oil CompanyJacksonKotlar #15,10023932660
400674Jul 6, 1992Jul 6, 1992Gillring Oil CompanyDE WittMurphree #13,60012331710
399399May 21, 1992May 21, 1992Gillring Oil CompanyWhartonLocke, Leon #14,80048133574
398428Apr 17, 1992Apr 17, 1992Gillring Oil CompanyVictoriaPerez Unit #17,00046932905

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/306400, documented in the API reference.