H Mack Cox
Operator of record for 5 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
H Mack Cox is the operator of record for 5 catalogued U.S. oil & gas wells in 1 state. None is listed as active, 5 (100%) are plugged & abandoned. Its largest concentration is in North Dakota, with 5 wells (100% of its portfolio).
Wells operated
5
Active
0
Plugged
5
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| North Dakota | 5 |
Well mix
- Oil wells
- 5
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 0%
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Claim H Mack Cox to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does H Mack Cox operate?
H Mack Cox's catalogued wells are spread across 1 state: North Dakota (5). Its 5 North Dakota wells are 0.0% of the 43,680 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 H Mack Cox’s wells are active, plugged or orphaned?
0% of H Mack Cox'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 H Mack Cox operate?
By product class, 5 (100%) 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 Arthur Arneson 1 in Ward, ND at 5,821 ft. The wells listed below sit in Ward (ND), Renville (ND) and Bottineau (ND).
Notable wells operated by H Mack Cox
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Arthur Arneson 1 | 33-101-00016 | Plugged & abandoned | Oil | Ward, ND | H. Mack Cox | 5,821 ft |
| M. F. Kotasek 1 | 33-101-00017 | Plugged & abandoned | Oil | Ward, ND | H. Mack Cox | 5,478 ft |
| John A. Southam 1 | 33-075-00022 | Plugged & abandoned | Oil | Renville, ND | H. Mack Cox | 5,112 ft |
| Feland-State 1 | 33-009-00077 | Plugged & abandoned | Oil | Bottineau, ND | H. Mack Cox | 4,380 ft |
| O. A. Anderson 1-A | 33-009-00076 | Plugged & abandoned | Oil | Bottineau, ND | H. Mack Cox | 4,230 ft |
Deepest first where depth is published. See all 5 wells →
Frequently asked questions
How many wells does H Mack Cox operate?
H Mack Cox is the operator of record for 5 catalogued oil & gas wells, with the largest concentration in North Dakota (5). Only wells in states WellCensus has ingested are counted.
How many of H Mack Cox's wells are still active?
0 of H Mack Cox's catalogued wells are active; 5 are plugged & abandoned.
In which states does H Mack Cox operate wells?
H Mack Cox is the operator of record for wells in North Dakota (5).
Does H Mack Cox operate mostly oil or gas wells?
5 of H Mack Cox's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is H Mack Cox's deepest well?
Among wells with a published depth, Arthur Arneson 1 in Ward, ND is the deepest at 5,821 ft.
Where H Mack Cox'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, “H Mack Cox — well portfolio”, https://wellcensus.com/operators/h-mack-cox-18893 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).