METHOD OF ANCHORING TUBING IN WELLS OPERATED BY SUCKER-ROD PUMPING UNITS Russian patent published in 2019 - IPC E21B23/01 F04B47/02 

FIELD: engines and pumps.

SUBSTANCE: invention relates to methods for anchoring tubing with hydraulic anchors in wells operated by sucker-rod pumping units. Method includes running of a flow column – tubing with an anchor into a well at a specified interval, creating an overpressure due to pumping a fluid into the tubing string from a wellhead. At the same time, preliminarily calculate the value of a wellhead overpressure, which determines the tension of the tubing string during anchoring, and anchoring is carried out by creating a calculated wellhead overpressure, such as so that, after the well has reached the steady state of operation, a resulting axial load acting on a casing from the anchor slips created by the fluid pressure in an annulus and the tubing string, as well as the elastic force of the tubing string, took the minimum possible value for the entire cycle of well sucker-rod pump operation, including the plunger stroke up and down, and the calculated wellhead overpressure is determined by the formula.

EFFECT: technical result is to increase the efficiency of anchoring tubing in wells.

1 cl