Petrora

OPERATORS · RRC 142425  · P-5 STATUS Y

Chalmers Expl Co

Abilene, TX

Watch this operator

Chalmers Expl CO has filed no drilling permits in the past 12 months; its most recent permit was issued May 30, 1996.

The RRC wellbore file lists 64 wells under its operatorship.

85 drilling permits have been issued to this operator number since 1984; its P-5 organization report was last filed July 3, 1997.

0
permits, last 12 months
—
vs prior 12 months (0)
0
counties, 12 months
0
producing wells, of 64 of record
4
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.

51%
spud rate · 43 of 85 mature permits
25
median days permit to spud · middle half 12–36
0
spuds, last 180 days
0%
cancelled · 0 permits
42
expired undrilled
7
permits a year over 13 active years

Where

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

County12 moAll timeWellsLast
Jones county →—4522May 30, 1996
Taylor county →—2827Nov 18, 1993
Fisher county →—62Jul 9, 1991
Palo Pinto county →—43Aug 3, 1993
Callahan county →—13Jan 12, 1996
Coleman county →—12Nov 21, 1985

All 85 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
Saddle Creek80
Ellenburger20
Tannehill20
Coleman Junction20
Caddo10
Mississippian10
Marble Falls10

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
81.7K
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

64
on the schedule
0
producing
0
shut in
0
injection
0
temp. abandoned
63
plugged

How it got them

4
permitted itself
23
acquired from others
55
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 11
0
permitted bbl/day, active
0
bbl injected, last 12 reported months
Jun 2025
reported through

By county

Jones0 active0 bbl/d
Taylor0 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
Drill0070
Reenter0011
Other002
Recompletion002

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
Taylor County Regular88520001200
Jones County Regular47113001110
Doty (Bluff Creek)2563033370
Potosi (Cook Sand)7263850050
Palo Pinto Co. Reg. (Gas)6870733330
Diana (Swastika Sand)2457650020
Shackelford County Regular8252200120
Mittie (Marble Falls)6222966610
Plowman (Goen Limestone)7195950010
Rotan (Hope Lime Upper)7845975010
Saturday East (Canyon Sand)8121230010
Tony (Strawn)9070250010

P-5 organization report

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

Registration
Status code Y
Last filed Jul 3, 1997
Address
P O Box 7396
Abilene, TX 79608
Officers and agents
Chalmers, John H. · President
Foster, Linda · Secretary

Latest permits

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

PermitSeenIssuedOperatorCountyLease / wellDepthAPI
448458May 30, 1996May 30, 1996Chalmers Exploration CompanyJonesThrockmorton, Susan #12,20025334335
448458May 30, 1996May 30, 1996Chalmers Exploration CompanyJonesThrockmorton, Susan #13,50025334335
443909Jan 26, 1996Jan 26, 1996Staley Oil CompanyJonesDoty, J. H. #101,89925333650
443628Jan 12, 1996Jan 12, 1996Chalmers Exploration CompanyCallahanShoultz, V. H. #11,90005936399
434591Apr 10, 1995Apr 10, 1995Chalmers Exploration CompanyJonesReeves Estate #22,30025330519
431991Jan 25, 1995Jan 25, 1995Chalmers Exploration CompanyJonesReeves Estate #12,30025334221
431890Jan 25, 1995Jan 25, 1995Chalmers Exploration CompanyJonesBitter Creek Ranch #42,30025334218
427570Sep 2, 1994Sep 2, 1994Chalmers Exploration CompanyJonesBittercreek Ranch "A" #62,30025334178
418264Nov 18, 1993Nov 18, 1993Chalmers Exploration CompanyTaylorBlackwell, Freddie A #12,30044133662
417479Oct 27, 1993Oct 27, 1993Chalmers Exploration CompanyTaylorBoyett, James #82,95044133659
416062Sep 20, 1993Sep 20, 1993Chalmers Exploration CompanyTaylorKnaus-Rehab #12,95044133656
416061Sep 20, 1993Sep 20, 1993Chalmers Exploration CompanyTaylorBlackwell, Freddie #12,30044133655
416060Sep 20, 1993Sep 20, 1993Chalmers Exploration CompanyJonesVinson "A" #11,95025334096
415223Aug 26, 1993Aug 26, 1993Chalmers Exploration CompanyJonesSteele, J.J. Trust #52,15025334091
414384Aug 3, 1993Aug 3, 1993Chalmers Exploration CompanyPalo PintoSanders "A" #13,90036334201

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/142425, documented in the API reference.