HAMMACK #5B
API 3503921797 · Custer County, Oklahoma
ACGAS
Drilling permit
Oklahoma files 1 application to drill this well, naming 6 target formations. A permit records what an operator asked to do, not what it did. A target formation is where the operator aimed, and the hole may have missed it, stopped short of it or never been drilled.
Filed 1999-01-13
WRADRPermit API
35039217970000
Operator
CHESAPEAKE OPERATING LLC
Well type
GAS
Approved
1999-01-13
Expires
1999-07-13
Proposed depth
11,700 ft
Surface casing
475 ft
Ground elevation
1,920 ft
Target formations
| Formation | Expected top (ft) |
|---|---|
| DOUGLAS (TONKAWA UP) | 7,660 |
| TONKAWA | 8,310 |
| COTTAGE GROVE | 8,910 |
| CLEVELAND | 9,790 |
| MARMATON | 10,310 |
| PRUE | 10,920 |
An expected top is the depth the operator predicted before drilling, on the application it filed with Oklahoma. It is not a measurement of where the formation was found.
Location
35.799767, -99.356486
35.79977, -99.35649 · Surface location as filed with Oklahoma⌘ or Ctrl + scroll to zoom
Every well in Custer County, Oklahoma
Oklahoma state record, from OK_wells_rbdms-wells.parquet. Corpus built 2026-09-11.