What is the working principle and stress analysis of grooved drill pipe
Grooved drill pipes are still widely used in the coal mining industry, because a lot of excavation and exploration are required, so the requirements for drill pipes are high. Today, the editor will tell you about the working principle and stress analysis of grooved drill pipe?
Grooved drill pipe
The grooved drill pipe is a spiral transport groove set on the surface layer of the drill pipe. Under the premise that it does not interfere with the application of the gripper under normal conditions and does not increase the driving force requirement of the drilling machine, the small strength of the drill pipe is kept unchanged. , Add a basic function of spiral transportation to the drill pipe, that is, the basic function of drilling holes. When coal cannons or hole plugging occurs, and the hydraulic powder discharge safety channel blocks the coal ash and cannot be discharged, the spiral chute makes the coal ash on the surface layer of the drill pipe in a flowing state from beginning to end during the rotation of the drill pipe, and the discharge collapses. The coal ash formed by the hole, and then the slag discharge function of the drill pipe is changed from fluid slag discharge to fluid and mechanical equipment cooperative slag discharge, which reasonably and effectively solves the stuck drilling situation of drilling blockage.
According to the design characteristics of the manufacturing process of the grooved drill pipe, the manufacturing process is to do the production and processing of the double helical groove on the surface layer of the bright drill pipe. Therefore, when selecting metal materials, the changes in the mechanical properties of the material should be fully considered. Better increase the design idea speed and save cost, and use the mathematical model to do a good job of numerical calculation method estimation. The boundary conditions are the fixed position on the left side, and the rotation torque N=1000N m on the right end, and the torque value is the size of the drill Rod is the normal drilling torque when the common drilling machine is drilling.
The above is the whole content of "What is the working principle and stress analysis of grooved drill pipe?", I hope you can understand.
