Strictly required by Api processing, and processing according to customer requirements.OD:88.9mm,73mm

Drill wells for the 88.9mm diameter, threaded at both ends, you need to use the tool joint connection with, the material is divided into DZ40, DZ50, R780, DZ40 material for drilling depth of 400 meters below, DZ50 material applied to the depth of 600 meters Following drilling, R780 material for the following drilling depth of 1,200 meters, DZ40, DZ50 40Cr material with material of the tool joint, R780 35CrMo material with material of the tool joint.

Our factory has the largest drill in northern China, joint production line, has been certified by API, equipment including 1250T large flat forging machine, C-120A type friction welding machine, 250KW frequency heat through the furnace, 10m straightening machine, 100T tensile testing machine and a number of CNC lathes, special testing equipment, manufacture of drill pipe to meet the geological, geothermal, wells, oil drilling and other trenchless technology requirements.Welcome to our factory tours.