| Business | Phone |
| Standard Oil & Gas Inc 1200 Smith St, Houston 77002 | (713) 752-2100 |
| Baker Oil Tools 7000 Hollister St A200, Houston 77040 | (713) 625-6860 |
| Petrovalve 7030 Empire Central Dr, Houston 77040 | (713) 466-9881 |
| Arbol Resources Inc 10777 Westheimer Rd, Houston 77042 | (713) 784-1675 |
| Flare Resources Inc 820 Gessner Rd, Houston 77024 | (713) 973-1820 |
| Sicom 10375 Richmond Ave, Houston 77042 | (832) 252-7656 |
| National Oilwell Varco 1530 W Sam Houston Pkwy S, Houston 77042 | (713) 960-5201 |
| Statoil Gulf Svc Llc 2101 Citywest Blvd 4-7, Houston 77042 | (713) 918-8200 |
| Thomas Energy Svc 10370 Richmond Ave 990, Houston 77042 | (713) 977-1845 |
| Trans-Global Petroleum Inc 10260 Westheimer Rd, Houston 77042 | (713) 975-0555 |
| Alamo Resources Llc 808 Travis St, Houston 77002 | (713) 224-2500 |
| Altinex 14760 Memorial Dr, Houston 77079 | (281) 759-5808 |
| Black Stone Energy Co 1001 Fannin St 2020, Houston 77002 | (713) 658-0398 |
| Blanco Oil & Gas 2630 Fountain View Dr, Houston 77057 | (713) 266-1355 |
| Bpk Resources Inc 1600 Smith St, Houston 77002 | (713) 978-7991 |
| Cardinal Resources 808 Travis St, Houston 77002 | (713) 278-7951 |
| James Fitzpatrick Potosky Inc 1800 Bering Dr, Houston 77057 | (713) 266-7790 |
| Coral Oil & Gas Inc 909 Texas St 202, Houston 77002 | (713) 222-7304 |
| Cymri Corp 5718 Westheimer Rd 1251, Houston 77057 | (713) 244-9405 |
| Desco Oil Co 2200 Post Oak Blvd 525, Houston 77056 | (713) 522-1901 |
| Eagle Geophysical 2603 Augusta Dr, Houston 77057 | (713) 243-6100 |
| Prime Operating Co 9821 Katy Fwy 1050, Houston 77024 | (713) 735-0000 |
| Eland Energy 350 N Sam Houston Pkwy E 204, Houston 77060 | (281) 445-5552 |
| Entech Enterprises Inc 4900 Woodway Dr 800, Houston 77056 | (713) 552-9696 |
| Escopeta Oil & Gas Corp 5005 Riverway Dr 440, Houston 77056 | (713) 623-2219 |
| Explorer Investments 6206 Terwilliger Way, Houston 77057 | (713) 785-4880 |
| Millenium Offshore Group Inc 5300 Memorial Dr 1070, Houston 77007 | (713) 652-0137 |
| Chevron Corp 1301 Mckinney St, Houston 77010 | (713) 754-2000 |
| Rutherford Oil 5 E Greenway Plz 220, Houston 77046 | (713) 622-5555 |
| John L Welsh 5005 Woodway Dr, Houston 77056 | (713) 626-8985 |
| Energy Exploration Inc 1770 Saint James Pl, Houston 77056 | (713) 622-7900 |
| Imperial Venture Intl 9888 Bissonnet St, Houston 77036 | (713) 777-0028 |
| Barnhart Co 2121 Sage Rd 333, Houston 77056 | (713) 622-4750 |
| National Energy Group Inc 1300 N Sam Houston Pkwy E 310, Houston 77032 | (281) 986-8800 |
| N S Neidell & Assoc 121 N Post Oak Ln, Houston 77024 | (713) 522-9922 |
| National Oilwell Varco 16211 Air Center Blvd, Houston 77032 | (281) 784-4360 |
| O'sullivan Oil & Gas 1021 Main St 2600, Houston 77002 | (713) 759-2030 |
| Vaquero Energy Co Inc 2121 Sage Rd 125, Houston 77056 | (713) 960-1350 |
| New Age Energy Inc 7500 San Felipe St, Houston 77063 | (713) 266-9963 |
| New Fluid Solutions Inc 6200 Savoy Dr, Houston 77036 | (713) 780-3600 |
| Newgulf Exploration 2828 Bammel Ln, Houston 77098 | (713) 812-7300 |
| Strata Management 2500 Tanglewilde St 250, Houston 77063 | (713) 975-1900 |
| Northstar Interests Lc 11 E Greenway Plz, Houston 77046 | (713) 626-9696 |
| Comstock Offshore Llc 600 Travis St, Houston 77002 | (713) 223-7125 |
| Erg Operating Co Inc 600 Travis St 7050, Houston 77002 | (713) 812-1800 |
| Fidelity Exploration Prod 1021 Main St, Houston 77002 | (713) 351-1950 |
| Linear Energy Management 1100 Louisiana St, Houston 77002 | (713) 654-4443 |
| Ocean Energy Houston 77002 | (713) 265-6000 |
| Panther Resources Corp 1201 Main St, Houston 77002 | (713) 759-6827 |
| Perenco 1021 Main St, Houston 77002 | (713) 276-2900 |
| Pingora Exploration Co 405 Main St, Houston 77002 | (713) 237-0777 |
| Playa Minerals & Energy Inc 600 Travis St, Houston 77002 | (713) 223-5600 |
| Pringle Resources Inc 1200 Smith St, Houston 77002 | (713) 651-1130 |
| Pure Resources Inc 1600 Smith St 4600, Houston 77002 | (713) 951-7800 |
| Rio Vista Resources 333 Clay St, Houston 77002 | (713) 654-4145 |
| Pacific Operating Co 600 Jefferson St, Houston 77002 | (713) 759-0450 |
| San Saba Energy 1001 Mckinney St, Houston 77002 | (713) 759-6841 |
| Scout Petroleum 1021 Main St, Houston 77002 | (713) 654-0080 |
| Southern Mineral Corp 1201 Louisiana St, Houston 77002 | (713) 308-5250 |
| Tana Exploration Co 1600 Smith St, Houston 77002 | (713) 571-2265 |
| Tempest Energy Resources Lp 1200 Smith St, Houston 77002 | (713) 276-2000 |
| Tri-Union Development Corp 530 Lovett Blvd, Houston 77006 | (713) 533-4000 |
| Transcontinental World Consult 440 Louisiana St 900, Houston 77002 | (713) 236-7716 |
| Sabine Energy Co Llc 1100 Louisiana St, Houston 77002 | (713) 659-1794 |
| Ventum Energy 815 Walker St, Houston 77002 | (713) 224-9500 |
| Weststar Exploration Co 811 Rusk St 708, Houston 77002 | (713) 223-5837 |
| Whittier Energy Corp 333 Clay St 700, Houston 77002 | (713) 850-1880 |
| Rose & Assoc 4203 Yoakum Blvd, Houston 77006 | (713) 528-8422 |
| Touchstone Energy Ventures 4617 Montrose Blvd, Houston 77006 | (713) 520-1767 |
| Vision Gas Ltd 550 Westcott St 430, Houston 77007 | (713) 861-7187 |
| Terra Firma Ventures Llc 6106 Hurst St, Houston 77008 | (713) 880-9189 |
| Texas Americas Energy Devmnt 3025 Maxroy St, Houston 77008 | (713) 622-2481 |
| Trispec Offshore Corp 1225 North Loop W 1055, Houston 77008 | (713) 453-7143 |
| Unicorp Inc 1117 Herkimer St, Houston 77008 | (713) 802-2944 |
| Petro Gulf Corp 909 Fannin St, Houston 77010 | (713) 659-8800 |
| Source Rock Resources Inc 1301 Mckinney St, Houston 77010 | (713) 654-1500 |
| Petrolink Svc Inc 2916 W T C Jester Blvd 106, Houston 77018 | (713) 686-3443 |
| X-Apc Energy Inc 3727 Pinemont Dr, Houston 77018 | (713) 688-0844 |
| Copano Energy 2727 Allen Pkwy 1200, Houston 77019 | (713) 621-2171 |
| West Gray Nail & Spa 1909 W Gray St, Houston 77019 | (713) 524-3577 |
| Ancell Energy 952 Echo Ln, Houston 77024 | (713) 467-9876 |
| Challenge Oil & Gas 952 Echo Ln, Houston 77024 | (713) 468-1105 |
| Empresa Energy 9821 Katy Fwy, Houston 77024 | (713) 468-0119 |
| Mcx Exploration 800 Gessner Rd 800, Houston 77024 | (713) 953-9292 |
| Nowsco Well Svc Inc 9821 Katy Fwy, Houston 77024 | (713) 932-7214 |
| Proton Operating Co 952 Echo Ln, Houston 77024 | (713) 463-8992 |
| Rocky Mountain Gas Inc 840 Gessner Rd, Houston 77024 | (713) 973-6969 |
| Sabco Oil & Gas 100 Carnarvon Dr, Houston 77024 | (713) 688-4132 |
| Skyline Oil & Gas 820 Gessner Rd, Houston 77024 | (713) 467-2861 |
| Sparta Exploration Llc 9545 Katy Fwy, Houston 77024 | (713) 827-9702 |
| Summit Gulf Venture Llc 820 Gessner Rd, Houston 77024 | (713) 365-7200 |
| Synergy Oil & Gas Lp 9821 Katy Fwy, Houston 77024 | (713) 827-9988 |
| Wapiti Energy Llc 840 Gessner Rd, Houston 77024 | (713) 468-6866 |
| Xpronet Usa Inc 9821 Katy Fwy, Houston 77024 | (713) 365-0011 |
| Petro Vest Inc 4615 Southwest Fwy 735, Houston 77027 | (713) 626-0303 |
| Sovereign Oil & Gas Co 3555 Timmons Ln 1500, Houston 77027 | (713) 961-0096 |
| Suman Technology 50 Briar Hollow Ln, Houston 77027 | (713) 961-3351 |
| Tatham Offshore Inc 4400 Post Oak Pkwy 1610, Houston 77027 | (713) 621-3996 |
| Transatlantic Petroleum Corp 1900 West Loop S, Houston 77027 | (713) 626-9373 |
| W Craig Chiders 3405 Marquart St, Houston 77027 | (713) 963-9193 |
| Weaver Oil & Gas 1233 West Loop S, Houston 77027 | (713) 623-8267 |
| Westside Energy 4400 Post Oak Pkwy, Houston 77027 | (713) 979-2660 |
| Williams & Co 3104 Edloe St 210, Houston 77027 | (713) 552-0344 |
| Patin Oil & Gas Co Inc 2426 Watts St, Houston 77030 | (713) 975-9885 |
| Petro Invest Llc 2222 Maroneal St, Houston 77030 | (713) 667-5692 |
| Holly D Grissom 9322 Stroud Dr, Houston 77036 | (713) 988-6711 |
| Sowsco Well Svc 6201 Bonhomme Rd, Houston 77036 | (713) 975-7092 |
| Trc Advanced Technologies 8700 Commerce Park Dr, Houston 77036 | (713) 592-5663 |
| Watson Manufacturing 12021 Proctor St, Houston 77038 | (281) 448-3643 |
| Electrowave Usa Inc 6125 W Sam Houston Pkwy N, Houston 77041 | (713) 896-7799 |
| Speedwell 12243 Fm 529 Rd A, Houston 77041 | (713) 983-1700 |
| National Oilwell Varco 10011 Meadowglen Ln, Houston 77042 | (713) 267-8600 |
| Orton Oil & Gas Llc 11000 Richmond Ave, Houston 77042 | (713) 785-5322 |
| Petrobras America Emergency 10777 Westheimer Rd 1200, Houston 77042 | (713) 782-0627 |
| Petroedge Resources Llc 10375 Richmond Ave, Houston 77042 | (713) 954-3650 |
| Subsurface Coneultants & Assoc 10255 Richmond Ave 300, Houston 77042 | (713) 953-0375 |
| Kaminski Enterprises 11931 Wickchester Ln, Houston 77043 | (281) 556-1375 |
| Phoenix International 10801 Hammerly Blvd, Houston 77043 | (713) 467-4200 |
| So Ho Resources Corp 10801 Hammerly Blvd, Houston 77043 | (713) 464-5729 |
| Key Energy Svc 512 Highway 90, Houston 77044 | (281) 456-8041 |
| Petrosin Inc 12221 Almeda Rd, Houston 77045 | (713) 383-7777 |
| Petrosin Inc 12234 Robin Blvd, Houston 77045 | (713) 413-3763 |
| Sichem Inc 11 E Greenway Plz, Houston 77046 | (713) 888-3540 |
| Sino-American Energy Corp 8 E Greenway Plz, Houston 77046 | (713) 355-2900 |
| Texas Standard Oil Co 9 E Greenway Plz 3040, Houston 77046 | (713) 655-1195 |
| W & T Offshore Inc 8 E Greenway Plz 1330, Houston 77046 | (713) 626-8525 |
| Tejas Casing Ltd 8740 Miller Road 2, Houston 77049 | (281) 215-1500 |
| Oilog Inc 2646 South Loop W, Houston 77054 | (832) 778-8811 |
| United Wellhead Svc 7135 Ardmore St, Houston 77054 | (713) 670-8600 |
| Regency Gas Svc 1431 Wirt Rd, Houston 77055 | (713) 812-9004 |
| Bhp Petroleum Americas Inc 1360 Post Oak Blvd, Houston 77056 | (713) 985-8000 |
| Opicoil America Inc 3040 Post Oak Blvd 800, Houston 77056 | (713) 297-8100 |
| Peregrine Gas & Oil 3 Riverway, Houston 77056 | (713) 589-6800 |
| Roemer-Swanson Energy Corp 35 N Wynden Dr, Houston 77056 | (713) 623-2183 |
| Schlumberger Companies 5599 San Felipe St, Houston 77056 | (713) 621-1124 |
| Staton Ventures Llc Houston 77056 | (713) 960-0330 |
| Woodside Energy 5151 San Felipe St 1200, Houston 77056 | (713) 963-8490 |
| Xplor Energy Inc 1980 Post Oak Blvd, Houston 77056 | (713) 960-1077 |
| Gray Wakefield 2323 S Voss Rd, Houston 77057 | (713) 465-6462 |
| Matagorda Production Co 675 Bering Dr, Houston 77057 | (713) 334-1238 |
| Optimal Energy Inc 1616 S Voss Rd, Houston 77057 | (713) 622-1110 |
| Paxco International Inc 510 Bering Dr 300, Houston 77057 | (713) 572-7300 |
| Roil Production Co 5851 San Felipe St 850, Houston 77057 | (713) 622-6750 |
| Sable Energy Corp 5701 Woodway Dr, Houston 77057 | (713) 621-3137 |
| Sharon Resources Inc 675 Bering Dr 860, Houston 77057 | (713) 789-5395 |
| South Bay Resources Llc 510 Bering Dr, Houston 77057 | (713) 785-8700 |
| Sterling Exploration & Prdctn 675 Bering Dr, Houston 77057 | (713) 780-9200 |
| Travelers Exploration & Drill 2401 Fountain View Dr 802, Houston 77057 | (713) 266-4131 |
| W R Brinkoeter & Assoc 2630 Fountain View Dr, Houston 77057 | (713) 783-8880 |
| Westpark Resources Inc 1616 S Voss Rd 870, Houston 77057 | (713) 526-2001 |
| Woodstone Resources Llc 6420 Richmond Ave, Houston 77057 | (713) 706-3090 |
| Zimmerman Resources Co 1616 S Voss Rd 875, Houston 77057 | (713) 952-0705 |
| Elk Resources 16801 Greenspoint Park Dr 340, Houston 77060 | (281) 453-9500 |
| Opus Oil & Gas 16800 Imperial Valley Dr, Houston 77060 | (281) 931-8933 |
| Petro-Hunt 16801 Greenspoint Park Dr, Houston 77060 | (281) 873-8410 |
| Petrospros 363 N Sam Houston Pkwy E, Houston 77060 | (281) 820-7801 |
| Proton Energy Llc 650 N Sam Houston Pkwy E, Houston 77060 | (281) 447-3443 |
| Rainier Exploration 340 N Sam Houston Pkwy E, Houston 77060 | (281) 931-5177 |
| Reliant Exploratin Ltd 333 N Sam Houston Pkwy E, Houston 77060 | (281) 931-9396 |
| Savannah Oil & Gas Co Llc 16800 Imperial Valley Dr, Houston 77060 | (281) 931-4200 |
| Superior Energy & Well Svc 523 N Sam Houston Pkwy E 200, Houston 77060 | (281) 999-0047 |
| Transmeridian Exploration Inc 397 N Sam Houston Pkwy E 300, Houston 77060 | (281) 999-9091 |
| Tubacex Inc 12707 North Fwy 100, Houston 77060 | (281) 875-8660 |
| Ultra Petroleum Corp 363 N Sam Houston Pkwy E 1200, Houston 77060 | (281) 876-0120 |
| Well Flow 600 Kenrick Dr B14, Houston 77060 | (281) 448-2900 |
| Fronterra Integrated 7310 Brace St, Houston 77061 | (713) 634-0777 |
| Enron Corp 8700 Woodway Dr, Houston 77063 | (713) 783-0496 |
| Spx Oil & Gas 2500 Tanglewilde St 120, Houston 77063 | (713) 789-0292 |
| Wave Energy Corp 7700 San Felipe St 125, Houston 77063 | (713) 278-8334 |
| Mcrae Exploration & Production 7904 N Sam Houston Pkwy W, Houston 77064 | (281) 664-2700 |
| Potential Energy 17314 Tomball Pkwy 350, Houston 77064 | (281) 970-2769 |
| Panattoni Development 450 Gears Rd 120, Houston 77067 | (281) 872-0343 |
| Texaco Asc Joint Venture 12700 Northborough Dr, Houston 77067 | (281) 874-3800 |
| Onager Energy Co 2611 Fm 1960 Rd W, Houston 77068 | (281) 440-9965 |
| Upland Exploration Inc 3303 Fm 1960 Rd W 145, Houston 77068 | (281) 444-7569 |
| Petrovista 12777 Jones Rd 240, Houston 77070 | (281) 807-7350 |
| Tammany Oil & Gas 8300 Fm 1960 Rd W, Houston 77070 | (281) 517-0770 |
| Spn Resources Llc 2202 Oil Center Ct 200, Houston 77073 | (281) 784-7949 |
| Cabot Oil & Gas Gulf Coast Reg 1200 Enclave Pkwy, Houston 77077 | (281) 272-8500 |
| Parker Drilling Co 1401 Enclave Pkwy 600, Houston 77077 | (281) 406-2000 |
| Petro Solution Ltd 1880 S Dairy Ashford St, Houston 77077 | (281) 496-3530 |
| Tile Design Studio 16305 Westheimer Rd, Houston 77082 | (281) 497-3700 |
| Rodel Oil & Gas Co 1830 S Kirkwood Rd 102, Houston 77077 | (281) 496-7141 |
| Sbm Imodco 1255 Enclave Pkwy, Houston 77077 | (281) 848-6000 |
| Shobal United Oil & Gas Corp 11655 Briar Forest Dr, Houston 77077 | (281) 497-7000 |
| St Croix Resources Inc 1880 S Dairy Ashford St, Houston 77077 | (281) 558-1121 |
| Complete Production Svc Inc 11700 Old Katy Rd 300, Houston 77079 | (281) 372-2300 |
| Global Energy Development Plc 580 Westlake Park Blvd, Houston 77079 | (281) 504-6400 |
| Intermoor Inc 900 Threadneedle St, Houston 77079 | (832) 399-5000 |
| Offshore Energy Ctr 200 N Dairy Ashford St, Houston 77079 | (281) 679-8040 |
| Orient Petroleum 15995 N Barkers Landing Rd, Houston 77079 | (281) 582-0500 |
| Petro Alliance Svc Co 580 Westlake Park Blvd 700, Houston 77079 | (281) 368-8400 |
| Pioneer Natural Resources Usa 12012 Wickchester Ln, Houston 77079 | (281) 293-7267 |
| Rodeo Resources Llc 800 Tully Rd, Houston 77079 | (281) 531-6363 |
| Victor J Marsico & Assoc 14125 Memorial Dr, Houston 77079 | (281) 759-6200 |
| Willrich Energy Inc 11757 Katy Fwy, Houston 77079 | (281) 759-1655 |
| Miden Systems 6300 Hillcroft St, Houston 77081 | (713) 271-7300 |
| Chevron Texaco Pipeline Co 2811 Hayes Rd, Houston 77082 | (281) 596-2103 |
| Atlas Petroleum Exploration 18000 Groeschke Rd 100, Houston 77084 | (713) 554-8900 |
| Gulf Geophysical 16360 Park Ten Pl 113, Houston 77084 | (281) 599-3002 |
| Oft Group 4007 Hawick Dr, Houston 77084 | (281) 238-9216 |
| Palace Exploration Co 15115 Park Row 110, Houston 77084 | (281) 829-6336 |
| Papco Inc 15835 Park Ten Pl 106, Houston 77084 | (281) 829-3313 |
| Rem Solutions Inc 17171 Park Row, Houston 77084 | (281) 492-8562 |
| Schlumberger 16223 Park Row 170, Houston 77084 | (281) 829-2225 |
| Tema Oil & Gas Co 16430 Park Ten Pl, Houston 77084 | (281) 829-3206 |
| Trinity Energy Resources Inc 16420 Park Ten Pl 450, Houston 77084 | (281) 829-9910 |
| Universal Seismic Assoc Inc 16420 Park Ten Pl, Houston 77084 | (281) 578-8081 |
| Weatherford Completion Systems 16600 Park Row, Houston 77084 | (281) 646-7184 |
| Well Head Welders Inc 7123 Romona Blvd, Houston 77086 | (281) 847-1106 |
| Sierra Pine Resources Inc 110 Cypress Station Dr, Houston 77090 | (832) 375-0300 |
| Sierra Petroleum Inc 2950 North Loop W, Houston 77092 | (713) 341-7549 |
| Solutions For Oil & Gas 2855 Mangum Rd 563, Houston 77092 | (713) 680-0401 |
| Woodside Energy 2950 North Loop W, Houston 77092 | (713) 341-7573 |
| Roberts Oil & Gas 3000 Richmond Ave, Houston 77098 | (713) 520-8798 |
| Roxanna Oil Co 3701 Kirby Dr, Houston 77098 | (713) 520-1153 |
| United Production Exploration 3000 Richmond Ave 400, Houston 77098 | (713) 333-5808 |
| J P & E Minerals 9555 W Sam Houston Pkwy S, Houston 77099 | (713) 995-7520 |
| Murphy Oil 9450 W Sam Houston Pkwy S, Houston 77099 | (281) 933-2500 |
| Wayne W Hardin & Assoc Po Box 571750, Houston 77257 | (713) 827-7696 |
| Mc Cord Production Ltd 1021 Main St, Houston 77002 | (713) 651-1414 |
| Petrie Parkman & Co 600 Travis St 7400, Houston 77002 | (713) 650-3383 |
| Petrohawk Energy Corp 1100 Louisiana St 4400, Houston 77002 | (832) 204-2700 |
| Petrospect Oil & Gas Corp 1201 Louisiana St 3350, Houston 77002 | (713) 658-9167 |
| Pine Ridge Operating 333 Clay St 3025, Houston 77002 | (713) 659-4140 |
| Plains Marketing Lp 333 Clay St 1600, Houston 77002 | (713) 646-4100 |
| Plains Exploration & Prdctn 700 Milam St 3100, Houston 77002 | (713) 654-1414 |
| Probe Resources Inc 700 Louisiana St 4250, Houston 77002 | (713) 222-9500 |
| Quintana Minerals Corp 601 Jefferson St 3600, Houston 77002 | (713) 751-7500 |
| Roy M Huffington Inc 700 Louisiana St 2400, Houston 77002 | (713) 753-1001 |
| S P Hartzell Inc 1001 Mckinney St 805, Houston 77002 | (713) 651-9100 |
| Sanchez Oil & Gas Corp 1111 Bagby St 1600, Houston 77002 | (713) 783-8000 |
| Sarita Energy Resources Ltd 808 Travis St 920, Houston 77002 | (713) 224-1681 |
| Shore Energy 1001 Mckinney St 520, Houston 77002 | (713) 655-1280 |
| Spinnaker Exploration Co 1200 Smith St 800, Houston 77002 | (713) 759-1770 |
| Strago Petroleum Corp 811 Dallas St 1407, Houston 77002 | (713) 652-5064 |
| Strand Energy Lc 910 Travis St, Houston 77002 | (713) 658-8096 |
| Texia Energy Management Inc 1100 Louisiana St 4700, Houston 77002 | (713) 655-0291 |
| Thorp Petroleum Corp 1001 Mckinney St 2200, Houston 77002 | (713) 759-0556 |
| Trace Oil & Gas Co 811 Dallas St 922, Houston 77002 | (713) 757-7883 |
| Transworld Oil Usa Inc 919 Milam St 800, Houston 77002 | (713) 428-7800 |
| Trek Oil & Gas 1001 Mckinney St 2000, Houston 77002 | (713) 651-1466 |
| Tribo Petroleum Corp 801 Travis St 2102, Houston 77002 | (713) 659-7551 |
| Veritas Exploration 815 Walker St 1001, Houston 77002 | (713) 650-0311 |
| Walter Oil & Gas Corp 1100 Louisiana St 200, Houston 77002 | (713) 659-1221 |
| Whitmar Exploration Inc 1021 Main St 1105, Houston 77002 | (713) 739-7300 |
| Wilcox Oil & Gas Inc 811 Dallas St 927, Houston 77002 | (713) 650-3060 |
| T/X Resources 4028 Marlowe St, Houston 77005 | (713) 665-5449 |
| Thunder Exploration Inc 1710 Bolsover St, Houston 77005 | (713) 529-2233 |
| Zinn Petroleum Co 3400 Bissonnet St, Houston 77005 | (713) 838-2900 |
| Sandefer Oil & Gas Co 5300 Memorial Dr, Houston 77007 | (713) 757-9605 |
| Southhampton Mineral Corp 550 Westcott St 430, Houston 77007 | (713) 861-2931 |
| Tauber Exploration 55 Waugh Dr 601, Houston 77007 | (713) 869-5656 |
| Stone Mountain Petroleum Llc 1404 Arlington St, Houston 77008 | (713) 224-3388 |
| Key Energy Svc Inc 1301 Mckinney St 1800, Houston 77010 | (713) 651-4300 |
| S G Interests Inc 909 Fannin St 2600, Houston 77010 | (713) 951-0100 |
| Seisgen Exploration Inc 1221 Lamar St 1177, Houston 77010 | (713) 756-7047 |
| Torch Energy Advisors Inc 1221 Lamar St 1175, Houston 77010 | (713) 650-1246 |
| Wagner & Brown 1331 Lamar St 1370, Houston 77010 | (713) 951-9200 |
| Wadi Petroleum Inc 4355 Sylvanfield Dr 200, Houston 77014 | (281) 583-2888 |
| Smith Petroleum Co 2040 North Loop W 302, Houston 77018 | (713) 956-5995 |
| Penn Virginia Oil & Gas Corp 840 Gessner Rd 800, Houston 77024 | (713) 722-6500 |
| Pete Dailey & Assoc 8705 Katy Fwy, Houston 77024 | (713) 464-3699 |
| Security Energy Co 10000 Memorial Dr 440, Houston 77024 | (713) 956-7900 |
| Seismic Micro-Technology 8584 Katy Fwy 400, Houston 77024 | (713) 464-6188 |
| Sierra Resources Llc 952 Echo Ln 290, Houston 77024 | (713) 464-8183 |
| Tradewinds 8811 Gaylord St, Houston 77024 | (713) 465-3523 |
| Tradewinds Oil & Gas Inc 8811 Gaylord St 200, Houston 77024 | (713) 465-7590 |
| Tri-C Resources 909 Wirt Rd, Houston 77024 | (713) 685-3600 |
| Pendragon Production Co 3826 Tartan Ln, Houston 77025 | (713) 669-9810 |
| Pel-Tex Oil Co 520 Post Oak Blvd, Houston 77027 | (713) 439-1530 |
| Pierce Junction Petroleum Inc 17 S Briar Hollow Ln 200, Houston 77027 | (713) 627-1979 |
| Rupertsland Resources 3405 Edloe St, Houston 77027 | (713) 629-6643 |
| Santa Rosa Resources Inc 3405 Edloe St, Houston 77027 | (713) 629-0699 |
| Texas Southeastern Gas Co 1177 West Loop S 700, Houston 77027 | (713) 968-7000 |
| Vaalco Energy Inc 4600 Post Oak Place Dr 309, Houston 77027 | (713) 623-0801 |
| W C Exploration 4208 Richmond Ave 200, Houston 77027 | (713) 877-8338 |
| Wabon Management Inc 2900 Weslayan St 430, Houston 77027 | (713) 871-1106 |
| Southwestern Energy Production 2350 N Sam Houston Pkwy 300, Houston 77032 | (281) 618-4700 |
| Well Test Solutions 1416 N Sam Houston Pkwy E 140, Houston 77032 | (281) 987-2244 |
| Tag Operating Co Inc 7447 Harwin Dr 145, Houston 77036 | (713) 789-5538 |
| Wilbanks Energy Corp 6161 Savoy Dr 1105, Houston 77036 | (713) 780-1267 |
| Oceaneering International Inc 11911 Fm 529 Rd, Houston 77041 | (713) 329-4500 |
| Perkins Drilling Tools Inc 11626 Tanner Rd, Houston 77041 | (713) 849-9155 |
| Unit Petroleum Co 24 E Greenway Plz 501, Houston 77046 | (713) 960-8870 |
| Stable Energy Lp 1717 Bingle Rd, Houston 77055 | (713) 468-7999 |
| Davis Gulf Coast Inc 1 Riverway 2020, Houston 77056 | (713) 961-8050 |
| Davis Petroleum Corp 1360 Post Oak Blvd 2400, Houston 77056 | (713) 626-7766 |
| Pathfinder Oil & Gas Inc 3 Riverway 650, Houston 77056 | (713) 623-4400 |
| Pluspetrol International Inc 5599 San Felipe St 1000, Houston 77056 | (713) 961-1095 |
| Purcell Interests Inc 1980 Post Oak Blvd 1585, Houston 77056 | (713) 961-4383 |
| Pursuit Exploration Co 777 Post Oak Blvd, Houston 77056 | (713) 650-1102 |
| R & R Resources Corp 203 Wynden Crescent Ct, Houston 77056 | (713) 621-1310 |
| Sabco Oil & Gas Inc 1360 Post Oak Blvd 2300, Houston 77056 | (713) 840-1980 |
| Schlumberger 5599 San Felipe St 1700, Houston 77056 | (713) 513-2000 |
| Shabuta Oil Corp 35 N Wynden Dr, Houston 77056 | (713) 626-7972 |
| Ske & P 1300 Post Oak Blvd 780, Houston 77056 | (713) 871-1178 |
| Tartan Exploration Inc 161 Sage Rd, Houston 77056 | (713) 960-8995 |
| Tgx Oil & Gas Inc 1330 Post Oak Blvd, Houston 77056 | (713) 965-9400 |
| Univation Technologies 5555 San Felipe St 1950, Houston 77056 | (713) 892-3700 |
| Usa Information Systems Inc 5333 Westheimer Rd 100, Houston 77056 | (713) 840-8282 |
| Ziegler Operating Co 5075 Westheimer Rd 795, Houston 77056 | (713) 850-0960 |
| Paladin International Corp 2630 Fountain View Dr, Houston 77057 | (713) 529-9394 |
| Penwell Energy Inc 6363 Woodway Dr, Houston 77057 | (713) 782-1311 |
| Petro Santander Colombia Inc 6363 Woodway Dr 350, Houston 77057 | (713) 784-8700 |
| Rio Bravo Exploration & Prod 2000 Bering Dr 210, Houston 77057 | (713) 781-6055 |
| Sandalwood Oil & Gas Inc 1220 Augusta Dr 400, Houston 77057 | (713) 759-6095 |
| Saxet Petroleum Inc 5847 San Felipe St 2050, Houston 77057 | (713) 783-4883 |
| Sutherland Resources Inc 675 Bering Dr 100, Houston 77057 | (713) 914-9610 |
| Teal Energy Usa Inc 1616 S Voss Rd 875, Houston 77057 | (713) 781-4350 |
| Texas Petroleum Investment Co 5850 San Felipe St 250, Houston 77057 | (713) 789-9225 |
| Thomson-Barrow Corp 6363 Woodway Dr 630, Houston 77057 | (713) 789-0090 |
| Triad Energy Corp 1616 S Voss Rd 650, Houston 77057 | (713) 783-2291 |
| Robert B Mitchell Trust 16815 Royal Crest Dr 190, Houston 77058 | (713) 975-6100 |
| Raedejon Oil & Gas Co 350 N Sam Houston Pkwy E 106, Houston 77060 | (281) 999-3300 |
| Rocksource Energy Corp 333 N Sam Houston Pkwy E, Houston 77060 | (281) 260-0700 |
| Stone Energy Corp 16800 Greenspoint Park Dr, Houston 77060 | (281) 872-1999 |
| Swift Energy Marketing Co 16825 Northchase Dr 400, Houston 77060 | (281) 874-2700 |
| San Felipe Oil & Gas Ltd 7500 San Felipe St, Houston 77063 | (713) 783-0232 |
| Shannon Exploration 3030 S Gessner Rd 262, Houston 77063 | (713) 785-2599 |
| Skh Management 7700 San Felipe St 500, Houston 77063 | (713) 782-1108 |
| Petroquest Energy 450 Gears Rd 330, Houston 77067 | (713) 784-8300 |
| Phinn W Townsend 13518 Glen Erica Dr, Houston 77069 | (281) 444-4060 |
| Prospect Energy 5629 Fm 1960 Rd W 354, Houston 77069 | (832) 249-8800 |
| Service Oil Co 14520 Wunderlich Dr 220, Houston 77069 | (281) 876-4100 |
| Unimar Co 4606 Fm 1960 Rd W 400, Houston 77069 | (281) 315-8860 |
| Primal Energy Corp 211 Highland Cross Dr, Houston 77073 | (281) 821-5600 |
| Canadian Triton Intl Ltd 2000 S Dairy Ashford St 550, Houston 77077 | (281) 556-5077 |
| Oil & Gas Consultants Intl 950 Threadneedle St, Houston 77079 | (281) 293-0832 |
| Petro Tech Assoc 11767 Katy Fwy, Houston 77079 | (281) 558-3996 |
| Petroleum Revenue Svc 10807 Saint Marys Ln 200, Houston 77079 | (713) 647-7677 |
| Spartan Petroleum Corp 14302 Apple Tree Rd, Houston 77079 | (281) 493-1022 |
| Swanson Consulting 1160 Dairy Ashford St 300, Houston 77079 | (281) 558-7999 |
| Texas Onshore Energy Inc 13615 Saint Marys Ln, Houston 77079 | (713) 827-7979 |
| Tom D Mooney Consulting Glgst 14623 Oak Bend Dr, Houston 77079 | (281) 493-2702 |
| Tondu Corp 14701 Saint Marys Ln 625, Houston 77079 | (832) 379-4222 |
| Sabre Oil & Gas Corp 2600 Gessner Dr 320, Houston 77080 | (713) 781-9216 |
| Petro Acquisition 6200 Highway 6 S 201, Houston 77083 | (281) 530-1909 |
| Oceaneering Advanced Tech 16203 Park Row 160, Houston 77084 | (281) 492-0047 |
| Pioneer Exploration Co 15603 Kuykendahl Rd 221, Houston 77090 | (281) 893-9400 |
| Stallion Energy 411 Richey Rd, Houston 77090 | (281) 872-1982 |
| U S Emerald Energy Co 616 Fm 1960 Rd W 600, Houston 77090 | (281) 872-9900 |
| Pan American Exploration Co 5005 Mitchelldale St, Houston 77092 | (713) 785-5255 |
| Premiere Inc 2813 Ferndale St, Houston 77098 | (713) 524-2240 |
| Ram Energy 3730 Kirby Dr 1000, Houston 77098 | (713) 974-5428 |
| Rwk Interest 3701 Kirby Dr 790, Houston 77098 | (713) 522-5518 |