supply api Short Drill PipeZJTG can supply short drill pipe with all kinds of specification and length. They adopt AISI4145H whole alloy steel and are produced according to dri
API drill pipeZJSB heavy weight drill pipe is made of whole of AIS14145H after whole-length heat treatment, and all physical properties is subject to SY/T5146-1997
API 7-1 drill pipeZJSB heavy weight drill pipe is made of whole of AIS14145H after whole-length heat treatment, and all physical properties is subject to SY/T5146-1997
zjsb brand whole spiral stabilizerZJSB whole spiral stabilizer adopts high–quality chrome molybdenum alloy steel production (except non–magnetic), and is up to prospective
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