Theoretical Analysis and Simulation on Rotation Failure of Kelly Cock

Kelly cock when used in high-pressure environment,there is valve ball immovability,the main reason is cock sealing contact with the friction caused by excessive torque.The friction torque is calculated in this paper,and Using ABAQUS simulation method is ob tained under high-pressure kelly cock sealing contact analysis results,Two results coincide.Have built a set of the method making use of finite element method to come to analyse high-pressure kelly cock sealing contact problem.