Analysis of Energy Dissipation on the Sealing Surface of Premium Connection Based on a Microslip Shear Layer Model

In high production gas wells, premium connections are subject to alternating loads and vibration excitation due the change of fluid pressure exerted on tubing string. The energy dissipation sealing surface affects performance connections. present study proposes a new analysis method for using microslip shear layer mode, novel technique overcome improve limitations existing this paper, based model, equilibrium equation connection was established with constraints taper surface, thread, torque shoulder. Then, control equations stick were derived, critical tangential force force–displacement hysteresis curves under different interface parameters obtained by solving equations. influence discussed standardized regression coefficient method. It found that friction influenced both minimum maximum forces, while stiffness only force. greater layer, smaller relative displacement contact which made it easier generate dissipation. much than layer. There positive correlation between While, there negative results can provide theoretical guide micro failure mechanism dynamic expand metal seals.