Analysis Method of Sucker Rod Centralizer Spacing in Three-dimensional Hole

Abstract

The usage rate of sucker rod centralizer more and more broad with the development of a sucker rod pump , adding sucker rod centralizer is very effective to reduce the impact of rod and tubing wear, increase the sucker rod and tubing service life, reduce the frequency of maintenance and the production cost .Starting from the actual borehole parameters, comprehensively considering bending stress condition of sucker rod string in the three-dimensional hole, analyzing of the axial load of sucker rod and lateral loads, and use the lateral deformation of the sucker rod equal annular space between tubing and sucker rod as the basic principle of centralizer allocation, to calculate and analysis of the spacing configuration of the stabilizer. The example analyzed shows that optimization design of sucker rod centralizer spacing has a certain reference value.

Analytical Study of Operational Properties of a Plate Shock Absorber of a Sucker-Rod String

“…A failure of suck rod strings leads to long and expensive underground well repair [5][6][7]. Some modern methods of increasing sucker-rod string's life solve only part of the problems, for example, preventing rod's corrosion [8], protecting rod's frictional actuation [9], and self-unscrewing. Irregular dynamic and vibration loads are the serious problems of sucker-rod string's operation [10].…”