| Business | Phone |
| Atlas Petroleum 1100 Nasa Pkwy, Houston 77058 | (281) 335-3348 |
| Peter Paul Petroleum 1221 Mckinney St 3700, Houston 77010 | (713) 209-1111 |
| Itochu International Inc 1300 Post Oak Blvd 900, Houston 77056 | (713) 843-6500 |
| Aspen Technology Inc 2500 Citywest Blvd 1600, Houston 77042 | (713) 584-1000 |
| Total Petrochemicals Usa Inc 1201 Louisiana St 1800, Houston 77002 | (713) 483-5000 |
| United Petroleum Transports 2700 Appelt Dr, Houston 77015 | (281) 457-1750 |
| A3im Inc 8866 Gulf Fwy, Houston 77017 | (713) 378-7600 |
| Petroleum Technology Transfer 2916 W T C Jester Blvd, Houston 77018 | (713) 688-0900 |
| Petroleum Advisors 10409 Town And Country Way, Houston 77024 | (713) 821-0062 |
| Sea Petroleum & Gas Co 800 Gessner Rd 900, Houston 77024 | (281) 440-4822 |
| Nynas Usa Inc 1800 E Loop Fwy S 1700, Houston 77027 | (713) 586-3831 |
| Select Environmental Petroleum 223 Mccarty St, Houston 77029 | (713) 675-7376 |
| Petroleum Open Projects Po Box 36025, Houston 77236 | (713) 783-2155 |
| Ram Tray Svc Inc 14419 Henry Rd, Houston 77060 | (281) 999-3774 |
| Vestex Oil & Gas Inc 505 N Belt Dr E, Houston 77060 | (281) 445-5001 |
| Sunmart Inc 3648 Fm 1960 Rd W, Houston 77068 | (281) 444-2266 |
| American Petroleum Llc 12260 Westheimer Rd, Houston 77077 | (281) 598-1060 |
| Petroleum Wholesale 15303 Ella Blvd, Houston 77090 | (281) 875-0248 |
| Ronco Petroleum Inc 17024 Butte Creek Rd, Houston 77090 | (281) 397-8444 |
| Petroleum Wholesale 9140 Eastex Fwy, Houston 77093 | (713) 692-8562 |
| Petroval Us 2901 Bammel Ln, Houston 77098 | (713) 527-9575 |
| Society Of Petroleum 811 Dallas St, Houston 77002 | (713) 651-1639 |
| Sterling Chemicals Holdings 333 Clay St 3600, Houston 77002 | (713) 650-3700 |
| Valero Refining Co 9701 Manchester St, Houston 77012 | (713) 923-6641 |
| Onyx Petroleum 11811 North Fwy, Houston 77060 | (281) 591-4720 |
| Shell Oil Products Us 12700 Northborough Dr, Houston 77067 | (281) 874-7000 |
| Riley Electric Log Inc 5151 Mitchelldale St, Houston 77092 | (713) 957-0490 |
| Saudi Refining Inc 9009 West Loop S, Houston 77096 | (713) 432-4505 |