Stress Analysis and Optimum Design of PDC Die for Offshore Drilling Engineering

摘要

The maximum internal tangential stress is a critical parameter for the design of the PDC (polycrystalline diamond compact) die that has been widely applied to offshore oil drilling. A simple equation for the calculation of the stress is proposed, and verified by the test data from Kingdream Corp. of China, the largest bit Company in China. An optimum method for the design of the PDC die is presented and demonstrated in detail, and software for the design and FEM analysis of the die is developed on the basis of the method. This software has been used in oil industry in recent years.