UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Notice of Effectiveness
Effectiveness Date: March 25, 2016
Accession Number: 0001193125-16-506687
Submission Type: POS AM
CIK: 0000798949
Company Name: UNIT CORP
File Number: 333-202956
CIK: 0001517153
Company Name: Superior Pipeline Company, L.L.C.
File Number: 333-202956-12
CIK: 0001517367
Company Name: Unit Drilling USA Columbia, L.L.C.
File Number: 333-202956-10
CIK: 0001517369
Company Name: Preston County Gas Gathering, L.L.C.
File Number: 333-202956-09
CIK: 0001517371
Company Name: Unit Texas Co
File Number: 333-202956-08
CIK: 0001517174
Company Name: Superior Pipeline Texas, L.L.C.
File Number: 333-202956-07
CIK: 0001517173
Company Name: Superior Appalachian Pipeline, L.L.C.
File Number: 333-202956-06
CIK: 0000310405
Company Name: UNIT DRILLING & EXPLORATION CO
File Number: 333-202956-05
CIK: 0001517370
Company Name: Petroleum Supply Co
File Number: 333-202956-04
CIK: 0001517368
Company Name: Unit Drilling Columbia, L.L.C.
File Number: 333-202956-03
CIK: 0001517151
Company Name: Unit Drilling Co
File Number: 333-202956-02
CIK: 0001517152
Company Name: Unit Petroleum Co
File Number: 333-202956-01