SU1370302A1 - Borehole sucker-rod pump - Google Patents

Abstract

The invention can be used in the operation of oil wells in conditions complicated by sand conditions. The purpose of the invention is to increase the operational reliability and feed rate. The saddle of the cone 8 of the cylinder 1 of the pump is made with a cylindrical extension 11 with the formation of two coaxial chambers 12 and 13 with the nozzle-shank 10. When pumping liquid from the well, gas from

Description

7

Aj- - "

Do

9

WITH

is made through the radial channels 14 of the extension, located above the radial channels 14 of the nozzle-shank. Settling in chambers 12 and 13 to

the lower level of the channels 14 p p tube-shank mechanical impurities are discharged into the well through spring-loaded valves 15 and 16, 2, or less.

one

The invention relates to an oil production technique, in particular, to well sucker-rod pumps, and can be used in the operation of oil wells in conditions complicated by sand formation.

The purpose of the invention is to increase the operational reliability and feed rate.

FIG. 1 shows a well pump; a general view; FIG. 2 — node I in FIG. one.

The downhole sucker-rod pump contains a cylinder 1 mounted in cylinder 1 of a plunger 2 with a plunger tube 3 placed respectively in cylinder 1 and the plunger nozzle 3 of a hollow plunger 2 suction valve 4 with a tip-cone 5, a discharge valve 6 and a device 7 for lifting the suction valve 4 from the seat of the cone 8 of the cylinder 1 of the pump by rotating it along the thread 9.

The tip-cone 5 is additionally equipped with a shank 10. The cone 8 of the cylinder 1 of the pump is made with a cylindrical extension 11 to form two coaxial chambers 12 and 13 with the nozzle shank 10, each of which is provided with radial channels 14 in the side walls (not labeled) and the bottom is blocked, respectively, by spring-loaded valves 15 and 16.

The running thread 9 is made on the cone tip 5 and the tail pipe 10 and is placed under the suction valve 4. The cone 8 saddle is mounted on the pipe 17 connected to the cylinder 1. The cylindrical extension 11 is made with a base 18 and the tail 10 is rigidly connected to the pipe Spring-loaded valve 16 is installed in the housing 19. The suction valve 4

installed in a cylindrical extender 11 by means of a sealing disc 20 placed directly under the windows (not marked) for liquid to exit, the edges of the sealing disc rigidly adhering to the inner surface of the cylindrical extension, protecting its lower chamber 21 from sedimentation of mechanical impurities.

Well sucker rod pump works as follows.

During the course of the plunger 2 upwardly pumped liquid from the well through the radial channels 14 of the cylindrical extension 11 of the cone seat 8 enters the chamber 12, and then through similar radial channels 14 of the nozzle 10, into the chamber 13 and through the suction valve 4 into the cylinder 1 of the pump. In this case, when the jet of liquid turns, the gas is separated through the radial channels 14 of the cylindrical

an extension 11 located above the radial channels 14 of the nozzle 10J as the plunger moves downward returns to the annulus of the well (not shown). I settle down

in chambers 12 and 13 to the lower level of the holes 14 in the nozzle, mechanical impurities are discharged into the well through actuated spring-loaded valves 15 and 16. I

Before lifting the borehole sucker-rod pump from the well and when flushing it with the aid of a device 7 for raising the suction valve 4, the latter together with the tip-cone

5 is lifted by several threads along a running thread 9 of the nozzle 10, forming a gap (not marked) between the cone tip 5 and the cone seat 8.

After removing the plunger 2 with the device 7 for lifting the suction

3I

the valve 4 from the cylinder 1 of the pump, the fluid located in the column of pumping pipes is poured into the well through the said gap. In this case, the flexible edges of the sealing disc 20 are folded down and the liquid flows behind them.

Claims (1)

Invention Formula A downhole sucker-rod pump containing a cylinder, a hollow plunger installed in the cylinder, placed in the cylinder and the hollow plunger, respectively, suction and discharge valves, the suction valve being designed with a cone tip, and a device for lifting the suction 70302 the valve from the seat of the pump cylinder cone by rotating it along the drive thread, characterized in that, in order to increase operational reliability and feed rate, the tip-cone is additionally equipped with a tail piece, the seat of the pump cylinder cone is made with a cylindrical extension to form a connecting piece with the shank of two coaxial chambers, each of which is provided with radial channels in the side walls and the bottom is covered with a spring-loaded valve, the thread is made on the tip-end mustache and nozzle-shank and placed under the suction valve.  FIG. 2