21. American Drilling Fluids
Coordinate: icon:https://i1.ypcdn.com/ypu/images/icons/map-pin.png|29.786877,-95.66537
22. Ambar Lone Star
Coordinate: icon:https://i1.ypcdn.com/ypu/images/icons/map-pin.png|29.95142,-95.422066
23. Anchor Drilling Fluids USA Inc
Coordinate: icon:https://i1.ypcdn.com/ypu/images/icons/map-pin.png|29.958176,-95.54346
Phone: Phone: (832) 688-9452
24. M-I Swaco
Coordinate: icon:https://i1.ypcdn.com/ypu/images/icons/map-pin.png|29.753096,-95.49884
Phone: Phone: (281) 561-1300