Dynamics Analysis And Numerical Simulation Of Structures Of Rod String For Cavity Pump System

The main content of this article is taken out with the entirety for rod string supports studying a marriage partner,effect having considered factors such as taking rod string supports structure and gap of tube out and contacting state,borehole curvature,have built an entirety whipping rod string supports nonlinearity Mechanics model,its being able to describe that accepting taking rod string supports out becomes deformed strenuously comparatively accurately state.At the same time,the random on being unlike well-depth and being unlike borehole circumference direction touches friction specifically for whipping rod string supports and tube, the gap applying"the dynamic gap element" with space beam element theory, combines the impulse theorem, have come to describe that rod supports this kind of collision touches a problem drawing oil,has adopt direct integration of Newmark,has built the finite element methods taking rod string supports nonlinearity transient dynamics out,has provided one kind of effective numerical value reckoning to the kinetic methods of analysis taking rod string supports out.Take analytical result of rod string supports Mechanics out according to the entirety, may carry out valuation on to taking the rod string supports intensity out,designing that the rational strengthening the body resistance implement lays location combining with taking rod string supports material and structure characteristic property, the application after north 2-6-41 well indicates,it's the rod supports having designed that result is tend to reasonableness and reliable,avoiding to draw oil happens coming off breaking,insists to grind an accident.Owing to that kinetic methods of analysis theory,combining the floor control device,have brought forward permanent liquid face control method, with experiment for 5 wells of Daqing oil field, the percent of control point liquid face altitude error has satisfied project need without exception within 50 m is 83%, has realized permanent cavity pump liquid controlling purpose face to face.The characteristic property according to topology structure theory and the OpenGL function warehouse artwork treatment,the method having studied coming the 3-D simulates of long and thin rod,connecting rod post oneself geometry structure characteristic,the organic assembling making use of the triangle and the quadrilateral,structural rod supports outer covering,and by the fact that the rod supports axis mounts strategic point's parameterization have realized rod supports deformation under the control of,simulating,have applied the pair of slow exist and animated cartoon to wait for a technology frame, having carried out the animated cartoon simulation on rod supports combining with rod supports dynamics calculation bear fruit.The programming language applying Delphi and OpenGL has worked out the software"Dynamics Analysis and Numerical Simulation of structures of rod string for cavity pump system",may contact state to taking the rod string supports dynamics model out carrying out the motion analysing,but calculating out time domain inner rod supports,accepting force deformation,the collision under various working condition.Have owed a software the altitude designing the face taking rod string supports structure out,designing a centering guide laying location and moving liquid under the control of rationally for science, have provided one kind of pragmatic technology means,has establish a basis for 3-D motion simulates of the long and thin rod of Down-well.