| Business | Phone |
| Houghton Offshore 10375 Richmond Ave 1105, Houston 77042 | (713) 532-5300 |
| Ambar Inc 16825 Northchase Dr, Houston 77060 | (281) 873-7600 |
| Ambar Lone Star Fluid Svc 16801 Greenspoint Park Dr 250, Houston 77060 | (281) 877-1200 |
| American Drilling Fluids 16350 Park Ten Pl 260, Houston 77084 | (281) 646-7979 |
| Coastal Drilling Fluids 632 Rancho Bauer Dr, Houston 77079 | (281) 493-9993 |
| Degussa Oil Well Polymers 340 N Sam Houston Pkwy E 268, Houston 77060 | (281) 820-0955 |
| Densimix Inc 13501 Industrial Rd, Houston 77015 | (713) 453-7138 |
| Densimix Inc 3355 W Alabama St, Houston 77098 | (713) 627-1102 |
| Eco Fluids Inc 601 Jefferson St 3770, Houston 77002 | (713) 654-7888 |
| Fluids Management 12102 Almeda Rd, Houston 77045 | (713) 433-0322 |
| Mayco-Wellchem 1525 N Post Oak Rd, Houston 77055 | (713) 688-2602 |
| M-I Swaco 11808 Canemont St, Houston 77035 | (713) 721-1624 |
| M-I Swaco 12000 Aerospace Ave, Houston 77034 | (713) 640-3200 |
| M-I Swaco 5950 N Course Dr, Houston 77072 | (713) 739-0222 |
| Langham Creek Mud 6645 Queenston Blvd, Houston 77084 | (281) 859-0632 |
| Kelco Oil Field Group 3300 Bingle Rd, Houston 77055 | (713) 895-7575 |
| Ibex Chemicals Inc 12950 Emmett Rd, Houston 77041 | (713) 937-4533 |
| Idl Inc 10975 Northwest Fwy, Houston 77092 | (713) 688-5011 |
| Mudsaver Inc 3511 Pinemont Dr, Houston 77018 | (713) 688-0020 |
| N L Industries Inc 2404 Southwest Fwy, Houston 77098 | (713) 527-1100 |