Brennan Engineering & Instrumentation
Operator of record for 8 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
Brennan Engineering & Instrumentation 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 Wyoming, with 8 wells (100% of its portfolio).
Wells operated
8
Active
0
Plugged
8
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Wyoming | 8 |
Well mix
- Oil wells
- 0
- Gas wells
- 8
- Shut-in
- 0
- Active share
- 0%
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Claim your operator profileWhere does Brennan Engineering & Instrumentation operate?
Brennan Engineering & Instrumentation's catalogued wells are spread across 1 state: Wyoming (8). Its 8 Wyoming wells are 0.0% of the 129,957 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 Brennan Engineering & Instrumentation’s wells are active, plugged or orphaned?
0% of Brennan Engineering & Instrumentation'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 Brennan Engineering & Instrumentation operate?
By product class, 0 (0%) are oil wells and 8 (100%) gas wells; nationally the shares are 43% and 17%. The deepest of its wells with a published depth is State Vignaroli 5-29w-5380 in Johnson, WY at 2,911 ft. The wells listed below sit in Johnson (WY) and Sheridan (WY).
Notable wells operated by Brennan Engineering & Instrumentation
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| State Vignaroli 5-29w-5380 | 49-019-24649 | Plugged & abandoned | Gas | Johnson, WY | Brennan Engineering & Instrumentation | 2,911 ft |
| State Ucross 15-11c 5380 | 49-033-25191 | Plugged & abandoned | Gas | Sheridan, WY | Brennan Engineering & Instrumentation | 2,550 ft |
| State Ucross 13-11c 5380 | 49-033-25179 | Plugged & abandoned | Gas | Sheridan, WY | Brennan Engineering & Instrumentation | 2,500 ft |
| State Vignaroli 1-32a-5380 | 49-019-24652 | Plugged & abandoned | Gas | Johnson, WY | Brennan Engineering & Instrumentation | 1,558 ft |
| State Ucross 5-13c | 49-033-23511 | Plugged & abandoned | Gas | Sheridan, WY | Brennan Engineering & Instrumentation | 269 ft |
| State Ucross 15-14c | 49-033-24081 | Plugged & abandoned | Gas | Sheridan, WY | Brennan Engineering & Instrumentation | 251 ft |
| State Ucross 15-14a | 49-033-24067 | Plugged & abandoned | Gas | Sheridan, WY | Brennan Engineering & Instrumentation | 170 ft |
| State Ucross 5-13a | 49-033-25095 | Plugged & abandoned | Gas | Sheridan, WY | Brennan Engineering & Instrumentation | 136 ft |
Deepest first where depth is published. See all 8 wells →
Frequently asked questions
How many wells does Brennan Engineering & Instrumentation operate?
Brennan Engineering & Instrumentation is the operator of record for 8 catalogued oil & gas wells, with the largest concentration in Wyoming (8). Only wells in states WellCensus has ingested are counted.
How many of Brennan Engineering & Instrumentation's wells are still active?
0 of Brennan Engineering & Instrumentation's catalogued wells are active; 8 are plugged & abandoned.
In which states does Brennan Engineering & Instrumentation operate wells?
Brennan Engineering & Instrumentation is the operator of record for wells in Wyoming (8).
Does Brennan Engineering & Instrumentation operate mostly oil or gas wells?
0 of Brennan Engineering & Instrumentation's catalogued wells are oil wells and 8 are gas wells; the rest are injection, service or unclassified wells.
What is Brennan Engineering & Instrumentation's deepest well?
Among wells with a published depth, State Vignaroli 5-29w-5380 in Johnson, WY is the deepest at 2,911 ft.
Where Brennan Engineering & Instrumentation'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, “Brennan Engineering & Instrumentation — well portfolio”, https://wellcensus.com/operators/brennan-engineering-instrumentation-31777 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).