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 all 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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