Oklahoma operator 20257
COWLEY & HALLMARK
On the Oklahoma operator register. No well on this site names it as operator.
Register status CLOSEDNOBLE, OK
No well on this site names this operator
COWLEY & HALLMARK is on the Oklahoma register as number 20257. The state files an operator's name on each well rather than its number, so a company that has never been named on a well — or whose wells predate the register — shows none here.
The Oklahoma register also records this operator’s mailing address, phone number and named contact. This site publishes none of them. Corpus built 2026-08-27.