Duffield Sp
Operator of record for 4 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
Duffield Sp is the operator of record for 4 catalogued U.S. oil & gas wells in 1 state. None is listed as active, 0 (0%) are plugged & abandoned. Its largest concentration is in Illinois, with 4 wells (100% of its portfolio).
Wells operated
4
Active
0
Plugged
0
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 Duffield Sp to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Duffield Sp operate?
Duffield Sp'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 Duffield Sp’s wells are active, plugged or orphaned?
0% of Duffield Sp's catalogued wells are active, 29 percentage points below 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 Duffield Sp 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 Dunlap, A. 3 in Lawrence, IL at 1,623 ft.
Notable wells operated by Duffield Sp
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Dunlap, A. 3 | 12-101-08021 | Other status | Other type | Lawrence, IL | Duffield S P | 1,623 ft |
| Dunlap, A. 4 | 12-101-08022 | Other status | Other type | Lawrence, IL | Duffield S P | 1,615 ft |
| Dunlap, A. 2 | 12-101-08020 | Other status | Other type | Lawrence, IL | Duffield S P | 1,613 ft |
| Dunlap, A. 1 | 12-101-08019 | Other status | Other type | Lawrence, IL | Duffield S P | 1,601 ft |
Deepest first where depth is published. See all 4 wells →
Frequently asked questions
How many wells does Duffield Sp operate?
Duffield Sp 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 Duffield Sp's wells are still active?
0 of Duffield Sp's catalogued wells are active; 0 are plugged & abandoned.
In which states does Duffield Sp operate wells?
Duffield Sp is the operator of record for wells in Illinois (4).
Does Duffield Sp operate mostly oil or gas wells?
0 of Duffield Sp's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Duffield Sp's deepest well?
Among wells with a published depth, Dunlap, A. 3 in Lawrence, IL is the deepest at 1,623 ft.
Where Duffield Sp'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, “Duffield Sp — well portfolio”, https://wellcensus.com/operators/duffield-sp-104022 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).