Grannell Drilling
Operator of record for 10 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
Grannell Drilling is the operator of record for 10 catalogued U.S. oil & gas wells in 1 state. None is listed as active, 10 (100%) are plugged & abandoned. Its largest concentration is in Montana, with 10 wells (100% of its portfolio).
Wells operated
10
Active
0
Plugged
10
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Montana | 10 |
Well mix
- Oil wells
- 0
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 0%
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Claim your operator profileWhere does Grannell Drilling operate?
Grannell Drilling's catalogued wells are spread across 1 state: Montana (10). Its 10 Montana wells are 0.0% of the 42,011 catalogued in that state — its largest share of any state. Counts cover only states whose registries WellCensus has ingested with operator names; wells in Nebraska and Texas (location indexes) and in states without a registry ingest are not yet attributed to any operator.
How many of Grannell Drilling’s wells are active, plugged or orphaned?
0% of Grannell Drilling's catalogued wells are active, 29 percentage points below the national share of 29%. 100% are plugged & abandoned, against 47% nationally. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does Grannell Drilling operate?
By product class, 0 (0%) are oil wells and 0 (0%) gas wells; nationally the shares are 43% and 17%. The deepest of its wells with a published depth is Enneberg 22-6 in Toole, MT at 4,641 ft. The wells listed below sit in Toole (MT) and Blaine (MT).
Notable wells operated by Grannell Drilling
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Enneberg 22-6 | 25-101-21208 | Plugged & abandoned | Other type | Toole, MT | Grannell Drilling | 4,641 ft |
| Toney 1 | 25-005-21029 | Plugged & abandoned | Other type | Blaine, MT | Grannell Drilling | 4,191 ft |
| Cl. & Be. 15-8 | 25-101-21078 | Plugged & abandoned | Other type | Toole, MT | Grannell Drilling | 2,865 ft |
| A. Fey 13-13 | 25-101-21111 | Plugged & abandoned | Other type | Toole, MT | Grannell Drilling | 2,740 ft |
| Clark Bea<>14-6 | 25-101-21077 | Plugged & abandoned | Other type | Toole, MT | Grannell Drilling | 2,660 ft |
| Federal 35-1 | 25-101-07817 | Plugged & abandoned | Other type | Toole, MT | Grannell Drilling | 2,630 ft |
| Cl. & Be. 16-5 | 25-101-21082 | Plugged & abandoned | Other type | Toole, MT | Grannell Drilling | 2,588 ft |
| J. Fey #3 3 | 25-101-07763 | Plugged & abandoned | Other type | Toole, MT | Grannell Drilling | 2,480 ft |
| Christman 1 | 25-101-08644 | Plugged & abandoned | Other type | Toole, MT | Grannell Drilling | 1,803 ft |
| Wilson 1 | 25-101-21011 | Plugged & abandoned | Other type | Toole, MT | Grannell Drilling | 1,690 ft |
Deepest first where depth is published. See all 10 wells →
Frequently asked questions
How many wells does Grannell Drilling operate?
Grannell Drilling is the operator of record for 10 catalogued oil & gas wells, with the largest concentration in Montana (10). Only wells in states WellCensus has ingested are counted.
How many of Grannell Drilling's wells are still active?
0 of Grannell Drilling's catalogued wells are active; 10 are plugged & abandoned.
In which states does Grannell Drilling operate wells?
Grannell Drilling is the operator of record for wells in Montana (10).
Does Grannell Drilling operate mostly oil or gas wells?
0 of Grannell Drilling's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Grannell Drilling's deepest well?
Among wells with a published depth, Enneberg 22-6 in Toole, MT is the deepest at 4,641 ft.
Where Grannell Drilling's wells are
About this data
Source: State oil & gas regulator registries (operator of record as filed, exact-normalized across states) plus the USGS United States Documented Orphaned Well Database (2026), as published October 10, 2026 — WellCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.
Cite as: WellCensus, “Grannell Drilling — well portfolio”, https://wellcensus.com/operators/grannell-drilling-129794 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).