Our company's drill pipes are in accordance with API 5DP, API SPEC 7-1 Standards. The material of drill pipe body are chosen by the 1&3 group of API 5D. (Group 1-Grade E75; Group 3-Grade X95, G105, S135). The choice of tool joints is according to the customersrequirements, and the tool joints are up to API SPEC7-1 Standards.
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