Traffic Capacity Of Electric Submersible Pump Unit In Deviated Hole And Vulnerable Component Research

This article according to rely on its own gravity into down hole string of four criterion: stiffness, contact, strength, friction conditions and because ESP unit to receive hole the curvature change in the deviated hole to cause the unit to have the mechanical resistance which the big distortion as well as the unit down received, proposed used the intensity condition and friction condition appraises the electric pump unit deviated hole the traffic capacity, and the establishment of an electric submersible pump deviated hole stress deformation analysis by the 3-D finite element model.Using the ANSYS software big distortion, the contact non-linearized theory have carried on the analysis to the electric pump unit's deviated hole stress, calculates the WIDD-C17 well, 130 electric pump units, when Well pass through an angle of 30°can through the limit curvature for 6°/30m, this time the thrust of the decentralization is 1.75kN. Finally established using ANSYS software re-development function APDL has electric submersible pump unit deviated hole the traffic capacity appraisal specific program, might act according to the hole track, the electric pump unit which assigned, might simulation state of the unit in different curvature force deformation, and graphical display the results of electric pump unit compound stress and so on, and has carried on the appraisal to the unit in the different hole curvature the traffic capacity again. In electric pump unit after deviated section, because electric submersible pump axis and the pump joint bolt is extremely easy to expire, therefore this article has carried on the finite element analysis to the electricity pump axis and the pump joint bolt. Through finite element analysis which contacts to the electricity pump axis and the spline set, obtained the electricity pump axis stress distribution situation, spline axis with the maximum stress in the transition of the junction. Pump axis and Spline set into the same materials MonelK-500 from different materials, spline root stress concentration factor dropped 13.72%; Key spline axis adjacent to the root change into the inside circular arc from the outside arc design, spline root stress concentration factor decreased by 10.77%. It has provided the basis for the design of the spline axis and material selection of spline sets. In view of stress situation of the electric submersible pump unit to join the bolt when it is in withstanding different torque function, as well as bolt can transmit the torque and various bolts stress situation analysis when they are different arrangement, obtained the rule of the joint bolt of the electric submersible pump connection transfer torque, for judged the expiration and the unit of the bolt has provided the theory method.