Mammoth Service Group
Operator of record for 23 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
Mammoth Service Group is the operator of record for 23 catalogued U.S. oil & gas wells in 1 state. 22 (96%) are active, 0 (0%) plugged & abandoned. Its largest concentration is in Mississippi, with 23 wells (100% of its portfolio).
Wells operated
23
Active
22
Plugged
0
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Mississippi | 23 |
Well mix
- Oil wells
- 16
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 96%
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Claim Mammoth Service Group to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Mammoth Service Group operate?
Mammoth Service Group's catalogued wells are spread across 1 state: Mississippi (23). Its 23 Mississippi wells are 0.1% of the 34,924 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 Mammoth Service Group’s wells are active, plugged or orphaned?
96% of Mammoth Service Group's catalogued wells are active, 67 percentage points above the national share of 29%. 0% are plugged & abandoned, against 47% nationally. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does Mammoth Service Group operate?
By product class, 16 (70%) 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 Patterson Swd 1 in Jefferson, MS at 10,158 ft. The wells listed below sit in Jefferson (MS), Wilkinson (MS) and Adams (MS).
Notable wells operated by Mammoth Service Group
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Patterson Swd 1 | 23-063-20203 | Active | Injection | Jefferson, MS | Mammoth Service Group, LLC | 10,158 ft |
| Noland Estate Swd 2 | 23-063-00558 | Active | Injection | Jefferson, MS | Mammoth Service Group, LLC | 9,794 ft |
| Deyoung 1 | 23-157-20441 | Active | Injection | Wilkinson, MS | Mammoth Service Group, LLC | 7,206 ft |
| McCurley Unit 1 | 23-157-22142 | Active | Oil | Wilkinson, MS | Mammoth Service Group, LLC | 7,174 ft |
| Craig 3-A | 23-001-22931 | Active | Injection | Adams, MS | Mammoth Service Group, LLC | 6,622 ft |
| Craig 1 | 23-001-23466 | Active | Oil | Adams, MS | Mammoth Service Group, LLC | 6,600 ft |
| Craig 2 | 23-001-23471 | Active | Oil | Adams, MS | Mammoth Service Group, LLC | 6,600 ft |
| Craig 5 | 23-001-23498 | Active | Oil | Adams, MS | Mammoth Service Group, LLC | 6,500 ft |
| Armstrong Cpd 1 | 23-001-03302 | Active | Injection | Adams, MS | Mammoth Service Group, LLC | 6,500 ft |
| Armstrong Cp-D 4 | 23-001-00293 | Active | Oil | Adams, MS | Mammoth Service Group, LLC | 6,360 ft |
| Armstrong-Schuchardt Unit 1 1 | 23-001-20896 | Active | Oil | Adams, MS | Mammoth Service Group, LLC | 6,010 ft |
| Wagner 1-3 | 23-063-00055 | Active | Injection | Jefferson, MS | Mammoth Service Group, LLC | 5,491 ft |
Deepest first where depth is published. See all 23 wells →
Frequently asked questions
How many wells does Mammoth Service Group operate?
Mammoth Service Group is the operator of record for 23 catalogued oil & gas wells, with the largest concentration in Mississippi (23). Only wells in states WellCensus has ingested are counted.
How many of Mammoth Service Group's wells are still active?
22 of Mammoth Service Group's catalogued wells are active; 0 are plugged & abandoned.
In which states does Mammoth Service Group operate wells?
Mammoth Service Group is the operator of record for wells in Mississippi (23).
Does Mammoth Service Group operate mostly oil or gas wells?
16 of Mammoth Service Group's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Mammoth Service Group's deepest well?
Among wells with a published depth, Patterson Swd 1 in Jefferson, MS is the deepest at 10,158 ft.
Where Mammoth Service Group'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, “Mammoth Service Group — well portfolio”, https://wellcensus.com/operators/mammoth-service-group-136747 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).