OPERATORS · RRC 536110 · P-5 STATUS Y
Mayfield Engineering Service
Tulsa, OK
Watch this operatorMayfield Engineering Service has filed no drilling permits in the past 12 months; its most recent permit was issued August 29, 1991.
The RRC wellbore file lists 8 wells under its operatorship.
24 drilling permits have been issued to this operator number since 1977; its P-5 organization report was last filed April 6, 2007.
- 0
- permits, last 12 months
- —
- vs prior 12 months (0)
- 0
- counties, 12 months
- 0
- producing wells, of 8 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.
- 21%
- spud rate · 5 of 24 mature permits
- 41
- median days permit to spud · middle half 36–44
- 0
- spuds, last 180 days
- 0%
- cancelled · 0 permits
- 19
- expired undrilled
- 2
- permits a year over 14 active years
Where
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 |
|---|---|---|---|---|
| Knox county → | — | 9 | 2 | Apr 7, 1982 |
| Jack county → | — | 6 | 1 | Sep 25, 1984 |
| Goliad county → | — | 3 | 4 | Jan 9, 1989 |
| Jim Wells county → | — | 3 | 1 | Mar 2, 1979 |
| Baylor county → | — | 1 | 0 | Aug 29, 1991 |
| Duval county → | — | 1 | 0 | Sep 27, 1977 |
| Runnels county → | — | 1 | 0 | Sep 5, 1980 |
All 24 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 →
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
- 7.96K
- 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
- 8
- on the schedule
- 0
- producing
- 0
- shut in
- 0
- injection
- 0
- temp. abandoned
- 7
- plugged
How it got them
- 1
- permitted itself
- 1
- acquired from others
- 7
- 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 2
- 0
- permitted bbl/day, active
- 0
- bbl injected, last 12 reported months
- Jun 2025
- reported through
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 | 16 |
| Recompletion | 0 | 0 | 5 |
| Other | 0 | 0 | 3 |
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 |
|---|---|---|
| Knox City North (Strawn)50009500 | 2 | 0 |
| Premont NW. (4850)72949700 | 1 | 0 |
| Hordes Creek (Yegua #3)42575568 | 1 | 0 |
| Soleberg (Frio 2380)84546300 | 1 | 0 |
| Terrell Point E. (4030)88881498 | 1 | 0 |
| Terrell Point E. (4050)88881664 | 1 | 0 |
| Sam Easter (Congl)80024750 | 1 | 0 |
P-5 organization report
As registered with the RRC. About the P-5 →
- Registration
- Status code Y
- Last filed Apr 6, 2007
- Address
- 1924 S Utica Ave Ste 805
- Tulsa, OK 74104
- Officers and agents
- Mayfield, Marjorie · Trustee
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 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/536110, documented in the API reference.