Mcr
Operator of record for 570 catalogued wells across 2 states. Every well below links to its full registry page.
Filed as: M.C.R. Limited · MCR, LLC
At a glance
Mcr is the operator of record for 570 catalogued U.S. oil & gas wells in 2 states. 285 (50%) are active, 36 (6%) plugged & abandoned and 1 flagged as orphaned. Its largest concentration is in Montana, with 568 wells (100% of its portfolio).
Wells operated
570
Active
285
Plugged
36
Orphaned
1
Portfolio by state
| State | Wells |
|---|---|
| Montana | 568 |
| Illinois | 2 |
Well mix
- Oil wells
- 299
- Gas wells
- 185
- Shut-in
- 239
- Active share
- 50%
Is this your company?
Claim Mcr to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Mcr operate?
Mcr's catalogued wells are spread across 2 states: Montana (568) and Illinois (2). Its 568 Montana wells are 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 Mcr’s wells are active, plugged or orphaned?
50% of Mcr's catalogued wells are active, 21 percentage points above the national share of 29%. 6% are plugged & abandoned, against 47% nationally. 239 wells (42%) are shut-in — unplugged but idle. 1 wells filed under this name are flagged as orphaned — unplugged, with no operator able to plug them.
What kinds of wells does Mcr operate?
By product class, 299 (52%) are oil wells and 185 (32%) gas wells; nationally the shares are 43% and 17%. The deepest of its wells with a published depth is Erickson-Ruby 1-A in Pondera, MT at 4,250 ft. The wells listed below sit in Pondera (MT), Liberty (MT), Toole (MT) and Glacier (MT). 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 Mcr
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Erickson-Ruby 1-A | 25-073-05210 | Shut-in | Oil | Pondera, MT | Mcr, LLC | 4,250 ft |
| Dull 22-24 | 25-051-21639 | Shut-in | Oil | Liberty, MT | Mcr, LLC | 4,094 ft |
| Mahoney 1 | 25-051-05199 | Active | Gas | Liberty, MT | Mcr, LLC | 4,068 ft |
| Sasu 42x-26 | 25-101-23993 | Active | Oil | Toole, MT | Mcr, LLC | 3,878 ft |
| Sasu 19 | 25-101-23994 | Active | Injection | Toole, MT | Mcr, LLC | 3,766 ft |
| State W8-8 | 25-051-21114 | Active | Injection | Liberty, MT | Mcr, LLC | 3,700 ft |
| I. Wallace 12X-11 | 25-051-21242 | Active | Other type | Liberty, MT | Mcr, LLC | 3,450 ft |
| Federal 1-12 | 25-051-05460 | Shut-in | Oil | Liberty, MT | Mcr, LLC | 3,313 ft |
| State 34-36 | 25-035-21113 | Shut-in | Oil | Glacier, MT | Mcr, LLC | 3,305 ft |
| State 11-12 | 25-051-21832 | Active | Oil | Liberty, MT | Mcr, LLC | 3,280 ft |
| State 12X-12 | 25-051-21240 | Active | Oil | Liberty, MT | Mcr, LLC | 3,252 ft |
| State 1 | 25-051-05269 | Active | Injection | Liberty, MT | Mcr, LLC | 3,250 ft |
Deepest first where depth is published. See all 570 wells →
Frequently asked questions
How many wells does Mcr operate?
Mcr is the operator of record for 570 catalogued oil & gas wells, with the largest concentration in Montana (568). Only wells in states WellCensus has ingested are counted.
How many of Mcr's wells are still active?
285 of Mcr's catalogued wells are active; 36 are plugged & abandoned and 1 are flagged as orphaned.
In which states does Mcr operate wells?
Mcr is the operator of record for wells in Montana (568) and Illinois (2).
Does Mcr operate mostly oil or gas wells?
299 of Mcr's catalogued wells are oil wells and 185 are gas wells; the rest are injection, service or unclassified wells.
What is Mcr's deepest well?
Among wells with a published depth, Erickson-Ruby 1-A in Pondera, MT is the deepest at 4,250 ft.
Where Mcr'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, “Mcr — well portfolio”, https://wellcensus.com/operators/mcr-93107 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).