supply api drill collar ZYTGS Drill Collars are manufactured from 4145H modified alloy steel . The full length of heat treatment adopts the original medium frequency inducta
supply 4145H drill collar Heat treatment of ZJSB drill collar adopts unique medium frequency inductance heating method for hardening and tempering, during which steel parts ro
supply ZJSB spiral drill collar Spiral drill collars are one kind of the products of our company. Spiral grooves make mud circulate freely around the drill collar to equalize pressu
supply ZJSB brand spiral drill collar ZJSB Sprial Drill Collars are manufactured from 4145H modified alloy steel . The full length of heat treatment adopts the original medium frequency i
drilling sub DrillingSub is applied in transfer and connection among drill parts in the artesian well operation. ZJSB'Sdrilling Subs are made from 4145 H modified
drill collar blank ZYTG'S Drill Collar blankis manufactured from 4145H modified alloy steel . The full length of heat treatment adopts the original medium frequency ind
API drill collar blank ZYTGS Drill Collars are manufactured from 4145H modified alloy steel . The full length of heat treatment adopts the original medium frequency inducta
pup joint ZJSBcan supplypup joint with all kinds of specification and length. They adopt AISI4145H whole alloy steel and are produced according to drill collar
Heavy Weight Drill Pipe ZYTG's heavy weight drill pipe is made of whole rod of AISI 4145H after whole-length heat treatment and all physical properties is subject to API. SI
Non-magnetic Heavy Weight Drill Pipe ZYTG's heavy weight drill pipe is made of whole rod of AISI 4145H after whole-length heat treatment and all physical properties is subject to API. SI
