Drill-stem Sub, China Drill-stem Sub Supplier

Drill-stem Sub - all

Drill-stem Sub For Sale, Most Competitive Price, Fast Delivery, Custom Service, Wholesale Drill-stem Sub, Made in China, High Quality Products!, China drill-stem sub, drill tools Supplier, Manufacturer.

Drill-stem sub is the essential part during the drilling operation of petroleum, natural gas and geology exploration. It is one of the main parts of drill stem. It performs the function of connection and switching in drills of different specifications.
We can produce diverse ranges of drill-stem subs which are linked with drill collars, drill pipes, kellys and taps. Besides, we can supply connection slip blank. Drill-stem Sub is made from AISI4145H chrome-molybdenum alloy steel. The content of microelement is effectively controlled. Special heat treatment and ultrasonic non-damage inspection are applied. Therefore， our Drill-stem Sub has the advantages of high strength, pretty toughness, long life, and so on. The surface of connector thread has been phosphorized or copperized, which makes its anti-buckle performance excellent. Its mechanical properties have met the standard of API Spec7.
There are three types according to its shapes and functions:
a (same diameter): one sub has only one OD size
b (different diameters): one sub has two OD sizes
c (left hand): sub’s connecting thread is left-handed

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Shanxi Weigao Petroleum Drilling Tools CO., LTD

Address: NO.3, South Industrial Zone of Nanshahe, Songzhuang Shuiyu, Taiyuan, Shanxi, China, 030045
Tel: 0086-0351-2598640
Shanxi Weigao Petroleum Drilling Tools CO., LTD, a private high-tech enterprise with years of history in the production of petroleum drilling collars, square kellys, and other products, produces series of petroleum drilling machineries and non-excavation drills professionally. It assembles scientific research, production and marketing into a whole. We have many kinds of high-precision manufacturing and inspection equipment: special numerical-control pipe thread lathes, large milling machines, deep-hole boring machine drillings, friction welding, heat treatment production line with medium frequency as well as variety of thread gauges, single measuring instruments, thickness gauges, hardness testers, ultrasonic flaw detectors, ballistic work testing machines, universal testing machines with microcomputer displaying hydraulic pressure, and so on. With sophisticated production equipment, strict inspecting ways and strong technology, we have mastered the key technique in nationalizing petroleum drilling tools. API standard is implemented strictly throughout the whole process of production. Our company has already won the Certification of Quality System ISO9001: 2000 and has obtained the product logo licenses of API SPEC 7-1 (certificate No. 7-1-0625) and API Q1 (Certificate No. 0571), which are issued by American Petroleum Institute.