Cornerstne Expl
Operator of record for 8 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
Cornerstne Expl is the operator of record for 8 catalogued U.S. oil & gas wells in 1 state. None is listed as active, 8 (100%) are plugged & abandoned. Its largest concentration is in Illinois, with 8 wells (100% of its portfolio).
Wells operated
8
Active
0
Plugged
8
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Illinois | 8 |
Well mix
- Oil wells
- 1
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 0%
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Claim your operator profileWhere does Cornerstne Expl operate?
Cornerstne Expl's catalogued wells are spread across 1 state: Illinois (8). Its 8 Illinois wells are 0.0% of the 174,478 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 Cornerstne Expl’s wells are active, plugged or orphaned?
0% of Cornerstne Expl'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 Cornerstne Expl operate?
By product class, 1 (13%) 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 Wesselmann, Marvin & Andrew 1 in Clinton, IL at 3,280 ft. The wells listed below sit in Clinton (IL), Marion (IL), Jefferson (IL) and Washington (IL).
Notable wells operated by Cornerstne Expl
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Wesselmann, Marvin & Andrew 1 | 12-027-25811 | Plugged & abandoned | Other type | Clinton, IL | Cornerstne Expl.Co.,Inc. | 3,280 ft |
| Wiehle, Erwin 1-A | 12-121-27454 | Plugged & abandoned | Other type | Marion, IL | Cornerstne Expl.Co.,Inc. | 3,032 ft |
| Molenhour, Rosa 1 | 12-121-27712 | Plugged & abandoned | Other type | Marion, IL | Cornerstne Expl.Co.,Inc. | 2,956 ft |
| Langa, Harold 1 | 12-081-24740 | Plugged & abandoned | Oil | Jefferson, IL | Cornerstne Expl.Co.,Inc. | 2,300 ft |
| Langa, Harold 2 | 12-081-24781 | Plugged & abandoned | Other type | Jefferson, IL | Cornerstne Expl.Co.,Inc. | 2,264 ft |
| Schnute, Ella 2 | 12-189-24322 | Plugged & abandoned | Other type | Washington, IL | Cornerstne Expl.Co.,Inc. | 1,600 ft |
| Wesselmann, M. & A. 2 | 12-027-25838 | Plugged & abandoned | Other type | Clinton, IL | Cornerstne Expl.Co.,Inc. | 1,589 ft |
| Schnute, Ella 1 | 12-189-24310 | Plugged & abandoned | Other type | Washington, IL | Cornerstne Expl.Co.,Inc. | 1,562 ft |
Deepest first where depth is published. See all 8 wells →
Frequently asked questions
How many wells does Cornerstne Expl operate?
Cornerstne Expl is the operator of record for 8 catalogued oil & gas wells, with the largest concentration in Illinois (8). Only wells in states WellCensus has ingested are counted.
How many of Cornerstne Expl's wells are still active?
0 of Cornerstne Expl's catalogued wells are active; 8 are plugged & abandoned.
In which states does Cornerstne Expl operate wells?
Cornerstne Expl is the operator of record for wells in Illinois (8).
Does Cornerstne Expl operate mostly oil or gas wells?
1 of Cornerstne Expl's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Cornerstne Expl's deepest well?
Among wells with a published depth, Wesselmann, Marvin & Andrew 1 in Clinton, IL is the deepest at 3,280 ft.
Where Cornerstne Expl'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, “Cornerstne Expl — well portfolio”, https://wellcensus.com/operators/cornerstne-expl-94864 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).