What Is A Heavy Weight Drill Pipe?

What Is A Heavy Weight Drill PipeHeavy Weight Drill Pipe?

The heavy weight drill pipe is a basic component of the drill string. It is mainly used to transmit torque and transport drilling fluid. The pipe body and joint of the current drill pipe are connected together by butt friction welding. In order to increase the strength of the joint, the butt friction welding parts at both ends of the pipe body are thickened. The thickening forms are internal thickening, external thickening, and internal and external thickening.

The internal thickening reduces the inner diameter of the two ends of the pipe body to increase the thickness of the pipe wall. The outer diameter of this heavy weight drill pipe is consistent, and the outer diameter of the joint is not too large. When rotating in the well, the joint has less contact with the well wall and less wear. However, because the inner diameter of the thickened part is smaller than the inner diameter of the pipe body, the flow resistance during the circulation of the drilling fluid is increased.

The inner diameter of the external thickened heavy weight drill pipe is consistent, but the outer diameter of the two ends of the pipe body is increased. The outer diameter of this heavy weight drill pipe joint is larger than the outer diameter of the same size drill pipe joint. When rotating in the well, the contact friction between the joint and the well wall is increased, which is easy to wear; because the inner diameter of this heavy weight drill pipe is consistent with the inner diameter of the pipe body, the flow resistance is small when circulating the drilling fluid.

The inner and outer thickened heavy weight drill pipe is to reduce the inner diameter of the two ends of the pipe body and increase the outer diameter to increase the wall thickness of the pipe body at both ends. This structure of heavy weight drill pipe combines the advantages of the above two structures of heavy weight drill pipe.

Heavy Weight drill pipe: For the components on the drill string, the unit length weight of the weighted drill pipe is medium. This drill pipe is a heavy pipe wall with an extended joint.