Sierra Drilling
Operator of record for 57 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
Sierra Drilling is the operator of record for 57 catalogued U.S. oil & gas wells in 1 state. None is listed as active, 57 (100%) are plugged & abandoned. Its largest concentration is in Kansas, with 57 wells (100% of its portfolio).
Wells operated
57
Active
0
Plugged
57
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Kansas | 57 |
Well mix
- Oil wells
- 28
- Gas wells
- 6
- Shut-in
- 0
- Active share
- 0%
Is this your company?
Claim Sierra Drilling to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Sierra Drilling operate?
Sierra Drilling's catalogued wells are spread across 1 state: Kansas (57). Its 57 Kansas wells are 0.0% of the 473,140 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 Sierra Drilling’s wells are active, plugged or orphaned?
0% of Sierra Drilling'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 Sierra Drilling operate?
By product class, 28 (49%) are oil wells and 6 (11%) gas wells; nationally the shares are 43% and 17%. The deepest of its wells with a published depth is Chinn 1 in Pratt, KS at 4,900 ft. The wells listed below sit in Pratt (KS), Sedgwick (KS), Sumner (KS) and Stafford (KS).
Notable wells operated by Sierra Drilling
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Chinn 1 | 15-151-21083 | Plugged & abandoned | Gas | Pratt, KS | Sierra Drilling Company | 4,900 ft |
| Hay 'B' 2 | 15-173-20558 | Plugged & abandoned | Injection | Sedgwick, KS | Sierra Drilling Company | 4,595 ft |
| Friess 'A' 2 | 15-191-21415 | Plugged & abandoned | Injection | Sumner, KS | Sierra Drilling Company | 4,478 ft |
| Weishaar 'A' 1 | 15-191-20285 | Plugged & abandoned | Gas | Sumner, KS | Sierra Drilling Company | 4,354 ft |
| Phillips 1 | 15-191-20146 | Plugged & abandoned | Gas | Sumner, KS | Sierra Drilling Company | 4,346 ft |
| Walrod 'A' 1 | 15-185-20844 | Plugged & abandoned | Oil | Stafford, KS | Sierra Drilling Company | 4,320 ft |
| Wellington Unit 137-Inj | 15-191-19022 | Plugged & abandoned | Injection | Sumner, KS | Sierra Drilling Company | 3,705 ft |
| Wellington Unit 31-INJ | 15-191-10051 | Plugged & abandoned | Injection | Sumner, KS | Sierra Drilling Company | 3,704 ft |
| Wellington Unit 98-INJ | 15-191-10256 | Plugged & abandoned | Injection | Sumner, KS | Sierra Drilling Company | 3,703 ft |
| Wellington Unit 12-1 | 15-191-10062 | Plugged & abandoned | Injection | Sumner, KS | Sierra Drilling Company | 3,700 ft |
| Wellington Unit 95 | 15-191-10253 | Plugged & abandoned | Injection | Sumner, KS | Sierra Drilling Company | 3,699 ft |
| Wellington Unit 27-Inj | 15-191-10071 | Plugged & abandoned | Injection | Sumner, KS | Sierra Drilling Company | 3,699 ft |
Deepest first where depth is published. See all 57 wells →
Frequently asked questions
How many wells does Sierra Drilling operate?
Sierra Drilling is the operator of record for 57 catalogued oil & gas wells, with the largest concentration in Kansas (57). Only wells in states WellCensus has ingested are counted.
How many of Sierra Drilling's wells are still active?
0 of Sierra Drilling's catalogued wells are active; 57 are plugged & abandoned.
In which states does Sierra Drilling operate wells?
Sierra Drilling is the operator of record for wells in Kansas (57).
Does Sierra Drilling operate mostly oil or gas wells?
28 of Sierra Drilling's catalogued wells are oil wells and 6 are gas wells; the rest are injection, service or unclassified wells.
What is Sierra Drilling's deepest well?
Among wells with a published depth, Chinn 1 in Pratt, KS is the deepest at 4,900 ft.
Where Sierra 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, “Sierra Drilling — well portfolio”, https://wellcensus.com/operators/sierra-drilling-76423 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).