Flank Oil
Operator of record for 31 catalogued wells across 2 states. Every well below links to its full registry page.
Filed as: FLANK OIL COMPANY · Flank Oil
At a glance
Flank Oil is the operator of record for 31 catalogued U.S. oil & gas wells in 2 states. None is listed as active, 30 (97%) are plugged & abandoned. Its largest concentration is in Montana, with 28 wells (90% of its portfolio).
Wells operated
31
Active
0
Plugged
30
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Montana | 28 |
| Wyoming | 3 |
Well mix
- Oil wells
- 3
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 0%
Is this your company?
Claim Flank Oil to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Flank Oil operate?
Flank Oil's catalogued wells are spread across 2 states: Montana (28) and Wyoming (3). Its 28 Montana wells are 0.1% 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 Flank Oil’s wells are active, plugged or orphaned?
0% of Flank Oil's catalogued wells are active, 29 percentage points below the national share of 29%. 97% are plugged & abandoned, against 47% nationally. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does Flank Oil operate?
By product class, 3 (10%) 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 Cartwright 1 in Musselshell, MT at 7,669 ft. The wells listed below sit in Musselshell (MT), Rosebud (MT), Weston (WY), Big Horn (WY), Park (MT) and Glacier (MT) and other counties. State filings spell the name 2 ways; WellCensus merges exact-normalized spellings only, so subsidiaries and affiliates keep their own pages.
Notable wells operated by Flank Oil
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Cartwright 1 | 25-065-05053 | Plugged & abandoned | Other type | Musselshell, MT | Flank Oil | 7,669 ft |
| Holland Land<>1 | 25-065-05078 | Plugged & abandoned | Other type | Musselshell, MT | Flank Oil | 7,389 ft |
| R P Hauck 1 | 25-087-05222 | Plugged & abandoned | Other type | Rosebud, MT | Flank Oil | 6,643 ft |
| Oscar Linden Patent 1 | 49-045-11240 | Plugged & abandoned | Oil | Weston, WY | Flank Oil Company | 5,575 ft |
| Hoskins 2 | 49-003-06295 | Plugged & abandoned | Oil | Big Horn, WY | Flank Oil Company | 5,469 ft |
| Gjerde 1-X | 25-067-05015 | Plugged & abandoned | Other type | Park, MT | Flank Oil | 5,394 ft |
| Bugsby 1 | 25-035-05829 | Plugged & abandoned | Other type | Glacier, MT | Flank Oil | 5,350 ft |
| Stensvad 1 | 25-087-05414 | Plugged & abandoned | Other type | Rosebud, MT | Flank Oil | 5,194 ft |
| Tribal 475-1 | 25-035-05794 | Plugged & abandoned | Other type | Glacier, MT | Flank Oil | 4,740 ft |
| Goffena 1 | 25-069-05003 | Plugged & abandoned | Other type | Petroleum, MT | Flank Oil | 4,505 ft |
| Magelssen 1 | 25-087-05118 | Plugged & abandoned | Other type | Rosebud, MT | Flank Oil | 4,493 ft |
| Goffena 2 | 25-069-05007 | Plugged & abandoned | Other type | Petroleum, MT | Flank Oil | 4,486 ft |
Deepest first where depth is published. See all 31 wells →
Frequently asked questions
How many wells does Flank Oil operate?
Flank Oil is the operator of record for 31 catalogued oil & gas wells, with the largest concentration in Montana (28). Only wells in states WellCensus has ingested are counted.
How many of Flank Oil's wells are still active?
0 of Flank Oil's catalogued wells are active; 30 are plugged & abandoned.
In which states does Flank Oil operate wells?
Flank Oil is the operator of record for wells in Montana (28) and Wyoming (3).
Does Flank Oil operate mostly oil or gas wells?
3 of Flank Oil's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Flank Oil's deepest well?
Among wells with a published depth, Cartwright 1 in Musselshell, MT is the deepest at 7,669 ft.
Where Flank Oil'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, “Flank Oil — well portfolio”, https://wellcensus.com/operators/flank-oil-29154 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).