Petrora

OPERATORS · RRC 518499  · P-5 STATUS Y

M & K Oper LLC

Albany, TX

Watch this operator

M & K Oper LLC has filed no drilling permits in the past 12 months; its most recent permit was issued September 23, 2022.

The RRC wellbore file lists 97 wells under its operatorship (30 shut in).

It holds 7 active disposal or injection permits.

11 drilling permits have been issued to this operator number since 2011; its P-5 organization report was last filed September 4, 2025.

0
permits, last 12 months
—
vs prior 12 months (0)
0
counties, 12 months
0
producing wells, of 97 of record
44
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.

64%
spud rate · 7 of 11 mature permits
21
median days permit to spud · middle half 14–32
0
spuds, last 180 days
0%
cancelled · 0 permits
4
expired undrilled
1
permits a year over 11 active years

Permits issued by month

LAST 2 MONTHS · BY ISSUE DATE

Last 12 months 3

012

Where

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

County12 moAll timeWellsLast
Shackelford county →—1181Sep 23, 2022

All 11 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 Creek20

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
179K
bbl oil since reporting began

Oil, barrels

Last 12 months 0 · prior 12 122(-100%)

0200400600202420252026

Gas, mcf

Last 12 months 0 · prior 12 557(-100%)

01K2K3K202420252026

Beyond the permit record

RRC wellbore file

Wells of record

97
on the schedule
0
producing
30
shut in
0
injection
3
temp. abandoned
49
plugged

How it got them

0
permitted itself
73
acquired from others
6
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

7
active UIC permits of 17
3.3K
permitted bbl/day, active
0
bbl injected, last 12 reported months
Jun 2025
reported through

By county

Shackelford7 active3.3K bbl/d
Scurry0 active0 bbl/d
Throckmorton0 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
Drill0011

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
Shackelford County Regular82522001430
Roark (Tannehill)77148500130
Cronk (Tannehill)21797600120
Callahan County Regular1482000160
Throckmorton County Regular8981200160
Alexandria (Cook)143300350
Shackelford County Regular (Gas)8252202540
Tejas (1050)8870870020
Nail Tract 20 (Miss.)6437670020
Throckmorton County Regular(gas)8981202520
Shinnery Bend (Wolfcamp)8328550010
Wolf Camp (Swastika)9837275010

P-5 organization report

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

Registration
Status code Y
Last filed Sep 4, 2025
Gas operatorOil operator
Address
PO Box 3235
Albany, TX 76430
(325) 668-6618
Officers and agents
Tollett, Weldon Lee · Manager,member

Latest permits

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

PermitSeenIssuedOperatorCountyLease / wellDepthAPI
884081Sep 23, 2022Sep 23, 2022M & K Operating LLCShackelfordMatthews -C- #1072,00041739758
884080Sep 23, 2022Sep 23, 2022M & K Operating LLCShackelfordMatthews -C- #1062,00041739757
882671Sep 9, 2022Sep 9, 2022Clavo Oil, LLCShackelfordNail Ranch Block 1 #18031,99941739753
880307May 24, 2022May 24, 2022M & K Operating LLCShackelfordMatthews -C- #1052,00041739744
868403Mar 23, 2021Mar 23, 2021M & K Operating LLCShackelfordNail '151' #15,30041739724
864985Sep 9, 2020Sep 9, 2020M & K Operating LLCShackelfordNail Ranch 150 #15,00041739717
864644Aug 14, 2020Aug 14, 2020M & K Operating LLCShackelfordNail Ranch 106 #1S1,90041739714
860208Dec 20, 2019Dec 20, 2019M & K Operating LLCShackelfordNail Ranch 106 #15,60041739703
860208Dec 20, 2019Dec 20, 2019M & K Operating LLCShackelfordNail Ranch 106 #15,60041739703
811656Nov 3, 2015Nov 3, 2015Bright Hawk Operating CompanyShackelfordElliott, Glenn #196041707829
789668Jul 22, 2014Jul 22, 2014M & K Operating LLCShackelfordAckers Ranch 26 Tannehill Sd.u. #182,00041739501
763966Jun 6, 2013Jun 6, 2013Clavo Oil, LLCShackelfordNail Ranch Block 1 #18022,00041739406
752281Dec 10, 2012Dec 10, 2012Clavo Oil, LLCShackelfordNail Ranch Block 2 #37012,00041739345
734439Mar 5, 2012Mar 5, 2012Clavo Oil, LLCShackelfordNail Ranch Block 4 #94012,00041739262
726348Oct 20, 2011Oct 20, 2011M & K Operating LLCShackelfordDawson & Conway #812,00041739228

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/518499, documented in the API reference.