Cahill Drlg
Operator of record for 4 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
Cahill Drlg is the operator of record for 4 catalogued U.S. oil & gas wells in 1 state. None is listed as active, 4 (100%) are plugged & abandoned. Its largest concentration is in Illinois, with 4 wells (100% of its portfolio).
Wells operated
4
Active
0
Plugged
4
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Illinois | 4 |
Well mix
- Oil wells
- 0
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 0%
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Claim your operator profileWhere does Cahill Drlg operate?
Cahill Drlg's catalogued wells are spread across 1 state: Illinois (4). Its 4 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 Cahill Drlg’s wells are active, plugged or orphaned?
0% of Cahill Drlg'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 Cahill Drlg operate?
By product class, 0 (0%) 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 Schaller-Wilson 1 in Randolph, IL at 909 ft. The wells listed below sit in Randolph (IL), Madison (IL), Montgomery (IL) and Macoupin (IL).
Notable wells operated by Cahill Drlg
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Schaller-Wilson 1 | 12-157-01979 | Plugged & abandoned | Other type | Randolph, IL | Cahill Drlg. Co. | 909 ft |
| Werzel 1 | 12-119-01097 | Plugged & abandoned | Other type | Madison, IL | Cahill Drlg. Co. | 648 ft |
| Cruthis 1 | 12-135-01108 | Plugged & abandoned | Other type | Montgomery, IL | Cahill Drlg. Co. | 618 ft |
| Philip, Walter 1 | 12-117-00752 | Plugged & abandoned | Other type | Macoupin, IL | Cahill Drlg. Co. | 568 ft |
Deepest first where depth is published. See all 4 wells →
Frequently asked questions
How many wells does Cahill Drlg operate?
Cahill Drlg is the operator of record for 4 catalogued oil & gas wells, with the largest concentration in Illinois (4). Only wells in states WellCensus has ingested are counted.
How many of Cahill Drlg's wells are still active?
0 of Cahill Drlg's catalogued wells are active; 4 are plugged & abandoned.
In which states does Cahill Drlg operate wells?
Cahill Drlg is the operator of record for wells in Illinois (4).
Does Cahill Drlg operate mostly oil or gas wells?
0 of Cahill Drlg's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Cahill Drlg's deepest well?
Among wells with a published depth, Schaller-Wilson 1 in Randolph, IL is the deepest at 909 ft.
Where Cahill Drlg'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, “Cahill Drlg — well portfolio”, https://wellcensus.com/operators/cahill-drlg-105416 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).