OPERATORS · RRC 350200 · P-5 STATUS Y
Hamman Oil & Refining Co
Houston, TX
Watch this operatorHamman Oil & Refining CO has filed no drilling permits in the past 12 months; its most recent permit was issued April 28, 2023.
The RRC wellbore file lists 314 wells under its operatorship (30 producing, 32 shut in).
Lease reports credit it with 7.31K barrels of oil and 0 mcf of gas in the 12 months reported through April 2026, down 25% on the year before.
It holds 2 active disposal or injection permits, injecting 49K barrels in the 12 months reported through June 2025.
359 drilling permits have been issued to this operator number since 1977; its P-5 organization report was last filed February 4, 2026.
- 0
- permits, last 12 months
- —
- vs prior 12 months (0)
- 0
- counties, 12 months
- 30
- producing wells, of 314 of record
- 107
- 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.
- 66%
- spud rate · 238 of 359 mature permits
- 26
- median days permit to spud · middle half 8–54
- 0
- spuds, last 180 days
- 1%
- cancelled · 2 permits
- 118
- expired undrilled
- 8
- permits a year over 46 active years
Permits issued by month
LAST 1 MONTHS · BY ISSUE DATE
Last 12 months 3
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 |
|---|---|---|---|---|
| Fort Bend county → | — | 102 | 202 | Apr 28, 2023 |
| Harris county → | — | 54 | 13 | Jul 8, 2011 |
| Jim Hogg county → | — | 22 | 13 | Jul 19, 2013 |
| Colorado county → | — | 20 | 6 | Jul 13, 1987 |
| Sterling county → | — | 20 | 5 | Oct 6, 2000 |
| Chambers county → | — | 18 | 9 | Aug 26, 1998 |
| Goliad county → | — | 14 | 30 | Sep 16, 2009 |
| Midland county → | — | 13 | 9 | Nov 21, 2002 |
| Hardin county → | — | 9 | 1 | Apr 25, 2011 |
| Matagorda county → | — | 8 | 2 | Jan 7, 1997 |
| Liberty county → | — | 6 | 2 | May 2, 1986 |
| Polk county → | — | 6 | 2 | Feb 4, 1988 |
| Wharton county → | — | 6 | 1 | Mar 8, 2011 |
| Bee county → | — | 5 | 2 | Nov 5, 1997 |
| Edwards county → | — | 5 | 1 | Dec 15, 2000 |
| Galveston county → | — | 4 | 1 | Dec 1, 1989 |
| Schleicher county → | — | 4 | 0 | Jan 24, 2007 |
| Starr county → | — | 4 | 0 | Nov 29, 2007 |
| Burleson county → | — | 3 | 0 | Jan 13, 2020 |
| Dawson county → | — | 3 | 0 | Dec 19, 2006 |
| Jackson county → | — | 3 | 0 | Sep 29, 1995 |
| Jim Wells county → | — | 3 | 1 | Aug 3, 2011 |
| Karnes county → | — | 3 | 1 | Jul 5, 1991 |
| McMullen county → | — | 3 | 1 | Nov 18, 1982 |
| Bastrop county → | — | 2 | 0 | Feb 2, 1981 |
| Bowie county → | — | 2 | 0 | Oct 10, 1997 |
| Kent county → | — | 2 | 0 | Apr 17, 1980 |
| Milam county → | — | 2 | 0 | Dec 11, 2019 |
| Bexar county → | — | 1 | 2 | Dec 1, 1977 |
| Brazoria county → | — | 1 | 0 | Dec 7, 1981 |
| Brazos county → | — | 1 | 1 | Sep 19, 1985 |
| Gaines county → | — | 1 | 0 | May 8, 1997 |
| Garza county → | — | 1 | 0 | Nov 27, 1996 |
| Grayson county → | — | 1 | 0 | Feb 5, 1997 |
| Hansford county → | — | 1 | 3 | Jun 15, 1992 |
| LA Salle county → | — | 1 | 0 | Nov 20, 1981 |
| Leon county → | — | 1 | 0 | Dec 31, 1982 |
| Montgomery county → | — | 1 | 0 | Sep 26, 1980 |
| Pecos county → | — | 1 | 1 | Jan 13, 1995 |
| Stonewall county → | — | 1 | 0 | Feb 24, 1978 |
| Tyler county → | — | 1 | 0 | Dec 29, 1987 |
All 359 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 →
| Formation | Wells | Permitted last 3 yrs |
|---|---|---|
| Frio | 63 | 0 |
| Miocene (undifferentiated) | 53 | 0 |
| Yegua | 19 | 0 |
| Yates | 16 | 0 |
| Vicksburg | 14 | 0 |
| Queen City | 12 | 0 |
| Dean | 10 | 0 |
| Wilcox | 8 | 0 |
| Wolfcamp | 7 | 0 |
| Spraberry | 7 | 0 |
| Cisco | 4 | 0 |
| Catahoula | 4 | 0 |
| Canyon | 3 | 0 |
| Jackson | 3 | 0 |
| Cook Mountain | 3 | 0 |
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 →
- 7.31K
- bbl oil, last 12 reported months
- -25%
- vs the 12 months before
- 0
- mcf gas incl. casinghead, last 12
- 3.48M
- bbl oil since reporting began
Oil, barrels
Last 12 months 7,311 · prior 12 9,792(-25%)
Gas, mcf
Last 12 months 0 · prior 12 2,907(-100%)
Beyond the permit record
RRC wellbore file
Wells of record
- 314
- on the schedule
- 30
- producing
- 32
- shut in
- 1
- injection
- 2
- temp. abandoned
- 205
- plugged
How it got them
- 145
- permitted itself
- 21
- acquired from others
- 88
- 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
- 2
- active UIC permits of 23
- 6.5K
- permitted bbl/day, active
- 49K
- bbl injected, last 12 reported months
- Jun 2025
- reported through
By county
| Fort Bend | 2 active | 6.5K bbl/d |
| Harris | 0 active | 0 bbl/d |
| Goliad | 0 active | 0 bbl/d |
| Chambers | 0 active | 0 bbl/d |
| Burleson | 0 active | 0 bbl/d |
| Matagorda | 0 active | 0 bbl/d |
| Crosby | 0 active | 0 bbl/d |
| Bee | 0 active | 0 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 →
| Type | 12 mo | Prior 12 | All time |
|---|---|---|---|
| Drill | 0 | 0 | 300 |
| Recompletion | 0 | 0 | 51 |
| Reenter | 0 | 0 | 6 |
| Other | 0 | 0 | 1 |
| Field transfer | 0 | 0 | 1 |
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 |
|---|---|---|
| Big Creek7808001 | 200 | 30 |
| Berclair (2200 Frio)7250540 | 22 | 0 |
| Spraberry (Trend Area)85280300 | 8 | 0 |
| EL Dragon (Cook MTN)27960075 | 6 | 0 |
| Credo E. (Cisco Up.)21598105 | 5 | 0 |
| Jaron (Queen City)45775100 | 5 | 0 |
| Cypress (Y-9)22442575 | 4 | 0 |
| Trinity River Delta (F-14)91284250 | 3 | 0 |
| Cypress (Y-6)22442555 | 3 | 0 |
| Cotton Lake North (MARG.6280)20990500 | 3 | 0 |
| Berclair (1550)7250340 | 2 | 0 |
| Chesterville North (Yegua 6000)17552395 | 2 | 0 |
P-5 organization report
As registered with the RRC. About the P-5 →
- Registration
- Status code Y
- Last filed Feb 4, 2026
- Gas operatorOil operator
- Address
- 3270 W Main St
- Houston, TX 77098
- (713) 254-6982
- Officers and agents
- Hamman, Russell R. · Vice President
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/350200, documented in the API reference.