Bohetai Oil Field Pumping Eccentric Wear Of Tube And Rod

Partial wear of rod tubing is pumping in the course of the next stroke,tubing and sucker rod always contact,radial pressure tube and rod,and the relative motion,the friction between tubing and sucker rod,which we call the tube and rod pumping well worn.Eccentric wear problem will not only shorten the cycle of pump inspection,also increased the cost of oilfield development.At present,tubing and sucker rod eccentric wear problem has seriously affected the normal operation of pumping wells,is a very serious problem hindering the oil production of oil field.Research on the causes,tube and rod pumping well abrasion mechanism is of great significance,through the study of theory.Guide us to the actual production of everyday,so we used to reasonable anti eccentric worn technology.This paper is mainly to Bohetai oil pumping tube eccentric wear as the research object,through the pump inspection site analysis,we summarized the main factors influencing the tubing and sucker rod.Factors including the deviation,the sucker rod failure,high water cut and scale of 11 effect.Establishing the mechanics model of tubing and sucker rod,through the analysis and calculation.The calculation formula of sucker rod and tubing by all kinds of force.The effects of bending a larger force were between plunger and pump barrel half dry friction and formation fluid produced by the fixed valve force on the tubing;sucker rod bending impact force were between plunger and pump barrel half dry friction and formation fluid produced by moving all my strength.Through the calculation formula is derived to calculate the neutral point heavy oil rod and tubing,the neutral point calculation formula and points of sucker rod and tubing,for the production of the rational disposition of tube and rod provides theoretical basis for the.Bohetai oilfield in the application of anti eccentric wear certain effect achieved technology,this paper analyzes the advantages and disadvantages of application of partial abrasion measures in the prevention of Bohetai oilfield.