Analysis of Sealing Performance of Cone Reamer

Abstract

When the cone reamer is working, the upper end face of the piston contacts the drilling fluid. The sealing structure is used to isolate the drilling fluid at the upper and lower end faces of the piston, thus ensuring the differential pressure between the upper and lower end faces, so as to realize the axial downward movement of the piston. The sealing between the piston and the body will have a direct impact on the expansion quality of the reamer, and affect the subsequent reaming quality. At the same time, the seal ring may be squeezed into the gap between the body and the piston during the dynamic sealing process, resulting in. Therefore, this section carries out simulation analysis on the sealing structure, discusses its sealing performance and optimizes the structure.