Top Threading Services, Inc. owns and operates a 50 acre pipe facility outside Houston, Texas in Crosby. Top Threading provides quality OCTG end finishing service for tubing and casing ranging from 2 inches O.D. to 13 3/8 inches O.D. We are committed to our Quality Management System that qualifies under the API Q-1 program for our API Spec 5CT License. Additional services include pipe maintenance, ID and OD cleaning, and threading of used tubing, casing and drill pipe.