The drill pipe is the basic part of the drill string. It is made of seamless steel pipe (the wall thickness is generally 9~11mm). Its main function is to transmit torque and transport drilling fluid. deepen. Therefore, drill pipe occupies a very important position in oil drilling.
Drill pipe structure and specification
The drill pipe is composed of seamless steel pipe, the wall thickness is generally 9~11mm, and it is composed of two parts: the drill pipe body and the drill pipe joint. There are two ways to connect the drill pipe body joint: one is to connect with a thin thread, that is, there are thin male buckles at both ends of the pipe body, which are connected with the female thin buckle at one end of the joint, which is called a thin thread. The drill pipe is buckled; the other is that the pipe body and the joint are butt welded together by friction welding, which is called the butt welding drill pipe. Drill pipes with fine buckles have been basically eliminated at present, and all drill pipes produced or imported in my country are butt welded drill pipes (drill pipes without fine buckles).
