china hot slae spiral heavy weight drill pipe wholesale

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Integral heavy weight drill pipe is made from AISI 4145H alloy steel.acc.to API Spec.7 and SY/T5144. It is formed by hot forged and fully heat-treated.There is wear resistance hard banding on tool joints connections and central upset.The types of hard banding include Arno 100XT and 300XT. All threads are phosphated,copperized or cold worked. All connections are equipped with pressed steel thread protectors. All threads are machined with CNC Lathes-Double-Shouldered and special threads. if you want to know more information as spiral heavy weight drill pipe size,please see: http://www.petroleum-drilling.com/petroleum-drilling-tools/heavy-weight-drill-pipe.html

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HENAN WEIN INDUSTRY CO.,LTD

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