Shamrock Drilling
Operator of record for 58 catalogued wells across 4 states. Every well below links to its full registry page.
Filed as: SHAMROCK DRILLING INC · Shamrock Drilling · Shamrock Drilling Co. · Shamrock Drilling Corp.
At a glance
Shamrock Drilling is the operator of record for 58 catalogued U.S. oil & gas wells in 4 states. 6 (10%) are active, 39 (67%) plugged & abandoned and 7 flagged as orphaned. Its largest concentration is in Illinois, with 50 wells (86% of its portfolio).
Wells operated
58
Active
6
Plugged
39
Orphaned
7
Portfolio by state
| State | Wells |
|---|---|
| Illinois | 50 |
| Mississippi | 4 |
| California | 2 |
| Kansas | 2 |
Well mix
- Oil wells
- 24
- Gas wells
- 1
- Shut-in
- 0
- Active share
- 10%
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Claim your operator profileWhere does Shamrock Drilling operate?
Shamrock Drilling's catalogued wells are spread across 4 states: Illinois (50), Mississippi (4), California (2) and Kansas (2). Its 50 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 Shamrock Drilling’s wells are active, plugged or orphaned?
10% of Shamrock Drilling's catalogued wells are active, 19 percentage points below the national share of 29%. 67% are plugged & abandoned, against 47% nationally. 7 wells filed under this name are flagged as orphaned — unplugged, with no operator able to plug them.
What kinds of wells does Shamrock Drilling operate?
By product class, 24 (41%) are oil wells and 1 (2%) gas wells; nationally the shares are 43% and 17%. The deepest of its wells with a published depth is Parker 1 1 in Adams, MS at 7,455 ft. The wells listed below sit in Adams (MS), Jefferson (IL), Hamilton (IL), Marion (IL) and Wayne (IL). State filings spell the name 4 ways; WellCensus merges exact-normalized spellings only, so subsidiaries and affiliates keep their own pages.
Notable wells operated by Shamrock Drilling
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Parker 1 1 | 23-001-22706 | Plugged & abandoned | Other type | Adams, MS | Shamrock Drilling Inc | 7,455 ft |
| Vaught Maxine Unit 1 1 | 23-001-23161 | Plugged & abandoned | Other type | Adams, MS | Shamrock Drilling Inc | 6,760 ft |
| Hoit 1 | 12-081-24485 | Plugged & abandoned | Other type | Jefferson, IL | Shamrock Drilling Corp. | 3,700 ft |
| Gray Estates 36-87 | 12-065-24945 | Plugged & abandoned | Other type | Hamilton, IL | Shamrock Drilling Corp. | 3,540 ft |
| Timm, Alan 1 | 12-121-26973 | Plugged & abandoned | Oil | Marion, IL | Shamrock Drilling Corp. | 3,300 ft |
| Fleenor 1 | 12-191-30277 | Plugged & abandoned | Other type | Wayne, IL | Shamrock Drilling Corp. | 3,275 ft |
| Spangler 1 | 12-121-26359 | Plugged & abandoned | Oil | Marion, IL | Shamrock Drilling Corp. | 3,230 ft |
| Andre 1 | 12-081-24321 | Plugged & abandoned | Other type | Jefferson, IL | Shamrock Drilling Corp. | 3,100 ft |
| Timm, Alan 2 | 12-121-27019 | Plugged & abandoned | Oil | Marion, IL | Shamrock Drilling Corp. | 3,050 ft |
| Timm-Laurence Comm. 1 | 12-121-27003 | Plugged & abandoned | Oil | Marion, IL | Shamrock Drilling Corp. | 2,990 ft |
| Ramsey, Roy 1-A | 12-081-01732 | Plugged & abandoned | Other type | Jefferson, IL | Shamrock Drilling Corp. | 2,920 ft |
| Heck - Dalby 2 | 12-081-24081 | Active | Oil | Jefferson, IL | Shamrock Drilling Corp. | 2,852 ft |
Deepest first where depth is published. See all 58 wells →
Frequently asked questions
How many wells does Shamrock Drilling operate?
Shamrock Drilling is the operator of record for 58 catalogued oil & gas wells, with the largest concentration in Illinois (50). Only wells in states WellCensus has ingested are counted.
How many of Shamrock Drilling's wells are still active?
6 of Shamrock Drilling's catalogued wells are active; 39 are plugged & abandoned and 7 are flagged as orphaned.
In which states does Shamrock Drilling operate wells?
Shamrock Drilling is the operator of record for wells in Illinois (50), Mississippi (4), California (2) and Kansas (2).
Does Shamrock Drilling operate mostly oil or gas wells?
24 of Shamrock Drilling's catalogued wells are oil wells and 1 are gas wells; the rest are injection, service or unclassified wells.
What is Shamrock Drilling's deepest well?
Among wells with a published depth, Parker 1 1 in Adams, MS is the deepest at 7,455 ft.
Where Shamrock Drilling'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, “Shamrock Drilling — well portfolio”, https://wellcensus.com/operators/shamrock-drilling-10906 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).