Drill pipe is
the basic part of drill stem, used for deepening well bore,
transmitting the torque and shaping the recirculation channel of
drilling fluid. It�s composed by tube and connection, which are
welded together by friction welding process. The mechanical
properties of tube, connection and welding seam are ball meeting
the requirements of API 5D and API 7. In the light of the minimum
yield strength, it can be divided into two groups: first, grade E
drill pipe; second, all high-strength grade X**5, G***5, S***5
drill pipe. Our company can manufacture all specifications of drill
pipes according to customers� needs.
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