| Anadarko Petroleum Corporation The Woodlands, TX (832) 636-8721
Basic Energy Pearsall, TX 78061 (830) 334-4010
Big "6" Drilling Company Houston, TX 77063 (713) 783-2300
Blake Energy Operating LLC Raymondville, TX 78580
Bronco Oilfield Services Corpus Christi, TX (361) 289-7088
C C Forbes, LLC Alice, TX 78333 (361) 396-1898
Cabot Oil & Gas Corporation Houston, TX (281) 589-4600
Camden Resources Dallas, TX (972) 488-0444
Chesapeake Operating, Inc. (405) 879-9334
Chevron Drilling Odessa, TX 79760
Citation Oil & Gas Houston, TX 77069 (281) 891-1000
Dewbre Petroleum Corporation Corpus Christi, TX (361) 888-7978
El Paso Energy El Paso Production Oil & Gas Company Corpus Christi, TX (361) 887-3805
Fidelity E&P Company of Texas, LLC (720) 931-6445
Grey Wolf Drilling Company Alice, TX 78333 (361) 661-7724
Halliburton Energy Services St Louis, MO 63178 (314) 506-5500
Hilcorp Energy Company Jeanerette, LA (337) 276-7676
I E Miller Services, LP Eunice, LA 70535 (361) 664-3436
Kerr-McGee Oil & Gas Onshore, LP (832) 636-8721
Key Energy Detroiit, MI (432) 571-7106
Mortimer Exploration Company San Antonio, TX (210) 821-6168
Patterson UTI Drilling LLC Corpus Christi, TX (361) 576-6896
Pioneer Drilling Services, LTD Alice, TX 78333 (361) 664-2629
Smith Production Company Houston, TX (281) 296-5600
Total E&P USA, Inc. McAllen, TX 78501 (956) 686-7446
XTO Energy Midland, TX (432) 682-8873
Xtreme Coil Drilling Corporation Casper, WY (307) 234-3600
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