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HALLMARK UNIT #1-9

API 3504350121 · Dewey County, Oklahoma

ACGAS
API
3504350121
Operator
DIVERSIFIED PRODUCTION LLC
County
Dewey
Location
Sec 9 18N 18W (IM)

Drilling permits

Oklahoma files 2 applications to drill this well, naming 2 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 2003-02-28

WRARC
Permit API
35043501210001
Operator
CHESAPEAKE OPERATING LLC
Well type
GAS
Approved
2003-02-28
Expires
2004-02-28
Proposed depth
10,478 ft
Surface casing
399 ft
Ground elevation
2,000 ft

Target formation

FormationExpected top (ft)
OSWEGO8,742

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.

Filed 2004-01-07

WRARC
Permit API
35043501210002
Operator
CHESAPEAKE OPERATING LLC
Well type
GAS
Approved
2004-01-07
Expires
2004-07-07
Proposed depth
10,478 ft
Surface casing
417 ft
Ground elevation
2,000 ft

Target formation

FormationExpected top (ft)
BIG LIME8,742

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

36.049011, -99.126191

36.04901, -99.12619 · Surface location as filed with Oklahoma

Every well in Dewey County, Oklahoma

Oklahoma state record, from OK_wells_rbdms-wells.parquet. Corpus built 2026-09-11.