«Equipment and technologies for oil and gas complex»

Calculation of parameters of the torsional oscillation shock absorber of the rod column of the screw pumping unit

UDC: 622.276.53.054.4
DOI: 10.33285/1999-6934-2023-5(137)-24-28

Authors:

¹ Ufa State Petroleum Technological University, Oktyabrsky, Russia

Keywords: screw pump unit, string of rods, torsional oscillations, shock absorber

Annotation:

During the operation of surface-driven screw pumping units, oscillatory processes of downhole equipment start beginning, which reduce the durability of the unit elements, cause the breakdown of the rod string, worsen the parameters of the screw pumping units. To eliminate oscillating processes, it is proposed to install a torsional shock absorber specially designed for this purpose in the rod string assembly. The procedure for calculating the operating parameters of the torsional oscillation shock absorber is given. Optimum parameters of torsional oscillation shock absorber are found by solving the problem of torsional oscillations of downhole equipment of screw pumping units with surface drive resulting from falling characteristic of pump screw friction coefficient against rubber holder of the stator. The mathematical model of operation of the torsional oscillation shock absorber, which is a structure with an elastic element made of rubber, is described by the equations of the viscoelastic model. The analysis of the obtained equations proved the fact that the best way to solve them will be to develop a solution algorithm as well as spell a computer program in the Delphi programming language, which will allow obtaining the results of calculations in a readable graphical and tabular form.

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