SU1601318A1 - Protector for pumping rods - Google Patents

Abstract

The invention relates to an oil production technique and is intended to equip the pumping operation of oil wells. The goal is to increase the durability of the tread. It contains a housing in the form of a flat coil spring 1 with a groove 2 on the outer surface. The side faces 3 and 4 of the grooves 2 are located at an acute angle relative to the bottom of the groove towards each other. The pitch and inner diameter of the spring is selected in accordance with the dependency: H _pr Δ _pcs Δ _pr , where H _pr is the pitch of the spiral spring, mm

D _pcs pump rod diameter, mm

D _pr - internal diameter of the spiral spring. Depending on the length of the body friction of the boom tubing (tubing), you can use several protectors throughout the entire interval of friction, a series of protectors with the right and left windings, which prevents the coils of one protector from approaching the coils of the other. This ensures reliable protection of the body of the rod and the tubing during the interval of training. 1 hp ff, 1 ill.

Description

The invention relates to an oil production technique, in particular, equipment for the downhole operation of oil wells.

; The purpose of the invention is to increase the durability of the tread.

: The drawing shows the protector for pump rods.

i The protector for sucker rods contains k4) rpus in the form of a flat spiral spring 1, on the outer surface of which in | 1 is filled with a groove 2, the lateral faces 3 and 4 of which are located at an acute angle and with respect to the bottom of the groove towards one towards the d).

I In order to install the protector on the rod body, it is necessary to set it n |) at an angle to the rod body and enter the rod body into; the gap between the first and second coils, dley, vrash, and slightly bending n |) the sector, install it on the body of the rod.

 To securely fasten on the body of the pants -Uo

The pitch and inner diameter of the spiral pipe 1 should correspond to the following relationship:

Ihnp cdu T cdnp,

where hnp is the pitch of the spiral spring, mm;

 dujT- sucker rod diameter, mm;

I (j ,, p is the inner diameter of the spiral

; springs, mm.

; The sucker rod protector works in one go, after them.

 During the reciprocating movement of the pump rod rods, the protector jointly HJO with the rods moves in the string of compressive tubing. At each stroke of the rods up and down in the curved sections of the well and during bending to the olon of the pump rods, the tread will touch the walls of the tubing and thereby prevent the wear of the rod of pumps and the tubing. When the fluid moves at the place of installation of the tread, part of it will move along a helical groove between the two side edges of the groove, while ensuring heat removal from the friction zones of the tread to the tubing walls. At the moment of impact of the tread on the tubing walls due to the location of the side edges of the groove at an acute angle and towards each other

friend will be elastic deformation of the side faces 3 and 4 and the displacement of fluid from under them in opposite directions, i.e. the protector will work as a shock absorber, while reducing the vibration of the column of pump rods.

Depending on the length of the friction of the body of the boom tubing, several protectors can be used throughout the entire interval of friction, a series of protectors with right and left windings, which prevents the turn of one protector after the coils of the other. And thus will ensure reliable protection of the body of the rod and the tubing during the interval of training.

To manufacture the tread, it is necessary to use wear-resistant plastics of the polyamide group, since this reduces friction forces and increases the tread life.

The use of a tread in directional and twisted wells will allow an increase in the overhaul period of the well operation by increasing the reliability and durability of the operation of the string of pump rods.

Claims (2)

1. Protector for pump rods, including a case in the form of a flat spiral spring with a groove on the outer surface, characterized in that, in order to increase its durability, the lateral faces of the groove are located at an acute angle relative to the bottom of the groove towards each other . 2. The protector according to claim 1, characterized in that the pitch and inner diameter of the coil spring is selected in accordance with the dependence hnp R, where hip is the pitch of the spiral spring, mm; dmT - sucker rod diameter, mm; dnp - internal diameter of the spiral spring, mm.