OPERATORS · TEXAS · P-5 NUMBER 139586
Cass Oil Company
- P-5 status
- Inactive (I)
- P-5 last filed
- Jun 6, 1990
- Based in
- Dallas, TX
Cass Oil Company has filed no drilling permits in the past 12 months; its most recent permit was issued November 26, 1990.
The RRC wellbore file lists 22 wells under its operatorship.
160 drilling permits have been issued to this operator number since 1981; its P-5 organization report was last filed June 6, 1990.
- 0
- permits, last 12 months
- —
- vs prior 12 months (0)
- 0
- counties, 12 months
- 0
- producing wells, of 29 of record
- 0
- leases it reports
- —
- horizontal, 12 months
WINDOWS ON THE RRC ISSUE DATE · COMPUTED NOV 10, 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.
- 33%
- spud rate · 52 of 160 mature permits
- 20
- median days permit to spud · middle half 8–72
- 0
- spuds, last 180 days
- 0%
- canceled · 0 permits
- 108
- expired undrilled
- 18
- permits a year over 9 active years
Permits issued by month
LAST 60 MONTHS · BY ISSUE DATE
Last 12 months 0 · prior 12 0
Counties
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 |
|---|---|---|---|---|
| Reagan county → | — | 74 | 5 | Jan 9, 1989 |
| Sutton county → | — | 45 | 14 | Apr 30, 1984 |
| Irion county → | — | 27 | 1 | Nov 16, 1990 |
| Concho county → | — | 3 | 0 | Nov 26, 1990 |
| Upton county → | — | 3 | 0 | Jun 18, 1985 |
| Glasscock county → | — | 2 | 1 | Jan 25, 1985 |
| Mitchell county → | — | 2 | 1 | May 31, 1988 |
| Crane county → | — | 1 | 0 | Mar 23, 1990 |
| Howard county → | — | 1 | 0 | Jan 26, 1988 |
| Midland county → | — | 1 | 0 | Apr 22, 1985 |
| Tom Green county → | — | 1 | 0 | Feb 17, 1989 |
All 160 permits, searchable → · Leases it reported on → · On the map →
Formations in wells it permitted
Tops reported on completion filings for wells permitted under this operator number, including wells others run today. RRC wellbore file. About tops →
| Formation | Wells | Permitted last 3 yrs |
|---|---|---|
| Spraberry | 57 | 0 |
| Dean | 41 | 0 |
| Canyon | 24 | 0 |
| Clear Fork | 10 | 0 |
| Wolfcamp | 5 | 0 |
| San Angelo | 5 | 0 |
| Cisco | 4 | 0 |
| Santa Rosa | 2 | 0 |
| Base Cretaceous (marker) | 2 | 0 |
| Ellenburger | 1 | 0 |
| Strawn | 1 | 0 |
Production by month
PDQ LEASE REPORTS · REPORTED THROUGH AUG 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
- 0
- bbl oil since reporting began
No lease production reported under this operator number in the last ten years.
Beyond the permit record
Operator of record and permit operator
A well's operator of record is the RRC's, and its permit operator is the one on its latest drilling permit; neither fills in for the other. Its wellbores of record are counted as its wells, with its live permits; a well it permitted that another operator runs, or that the RRC lists with no operator at all, is not. Each count opens the wells it counts. Transfers and operator numbers →
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 | 157 |
| Recompletion | 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 |
|---|---|---|
| Sawyer (Canyon)81267333 | 13 | 0 |
| Calvin (Dean)14937333 | 4 | 0 |
| Spraberry (Trend Area)85279200 | 2 | 0 |
| Brooks (Canyon K)12244075 | 1 | 0 |
| Phyllis Sonora (Canyon Lower)71285300 | 1 | 0 |
| Westbrook (Ellenburger)96563525 | 1 | 0 |
P-5 organization report
As registered with the RRC. About the P-5 →
- Registration
- Status Inactive (I)
- Last filed Jun 6, 1990
- Address
- 5950 Berkshire LN Ste 530
- Dallas, TX 75225
- (214) 871-6000
- Officers and agents
- Cass, Frank W. · President
- Cass, William G. · 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 by the operator that filed them, through the statewide reported-through month; disposal from UIC permits and H-10 reports. Oil includes condensate from gas leases and gas includes casinghead gas from oil leases, as the RRC totals them. Summary figures are rebuilt nightly. Nothing is estimated.
Developers: this page as JSON is GET /v1/data/operators/tx/139586, documented in the API reference.