RU72268U1 - Borehole Centrifugal Pump Valve - Google Patents

Abstract

1. Valve of a borehole centrifugal pump, comprising a housing with an internal and external connecting thread and a saddle fixed in it, as well as a ball locking element located in the cylindrical channel of the axial displacement limiter, characterized in that the valve seat is provided with a seating groove under the sealing ring and is fixed relative to the body with a cylindrical sleeve and a washer with holes for the passage of formation fluid, and a pipe with a pipe screwed into it is installed in the upper part of the valve body sludge trap, provided with radial holes for the passage of formation zhidkosti.2. The downhole centrifugal pump valve according to claim 1, characterized in that the washer with holes for the passage of formation fluid is fixed from axial movement relative to the valve body by means of a spring ring. The downhole centrifugal pump valve according to claim 1, characterized in that the nozzle is mounted in the housing by means of a key with a spring ring.

Description

The utility model relates to hydraulic engineering and can be used in oil production by submersible pumps.

Known ball check valve for borehole centrifugal pumps, comprising a housing with an upper internal and lower external thread for connection to the tubing and to the fishing head of the pump. A cylindrical channel is formed in the valve body with a limiter of axial movement of the shut-off element, made integrally with the body and containing holes for the passage of fluid in the pressure pipe. The ball locking element is locked in the valve seat rigidly fixed in the housing by means of a nut and a threaded sleeve. (Utility Model Patent No. 56940, “Check Valve,” Bull. No. 27, 09/27/06.)

During operation of this non-return valve in the pump unit, the upper pump section becomes clogged with mechanical impurities when the pump stops.

The purpose of the utility model is to increase the operational reliability of a centrifugal pump by eliminating the reverse rotation of the impellers of a centrifugal pump and clogging with mechanical impurities.

This goal is achieved by the fact that in the valve of a borehole centrifugal pump containing a housing with an internal and external connecting thread and a saddle fixed in it and a ball locking element located in the channel of the axial displacement limiter, according to a useful model, the valve seat is provided with a seating groove under the o-ring and fixed relative to the housing with a cylindrical sleeve and a washer with holes for the passage of formation fluid, and in the upper part of the valve body there is a pipe with screwed buried in it by a sludge trap pipe provided with radial holes for the passage of formation fluid. A washer with holes for the passage of formation fluid is fixed from axial movement relative to the valve body by means of a spring ring, and the nozzle is mounted in the body by means of a key with a spring ring.

Figure 1 shows the valve of a borehole centrifugal pump, a longitudinal section.

The borehole centrifugal pump valve comprises a housing 1 with an internal and external tapered thread for connection to the tubing in the upper part and to the fishing head of the pump in the lower. A seat 2 is installed in the housing 1 with a landing groove under the o-ring 3. The seat 2 is fixed relative to the housing 1 by a cylindrical sleeve 4 and a washer 5 with holes 6 for the passage of formation fluid. The spring ring 7 fixes the washer 5 from axial movement relative to the housing 1. The ball locking element is made with the possibility of movement in the cylindrical channel of the sleeve 4. In the upper part of the housing 1 there is a pipe 9 mounted in the housing 1 by means of a key 10 with a spring ring 11. In the pipe 9 by means of a thread, the sludge trap pipe 12 is screwed with the top end plugged. Radial holes 13 made in the upper part of the pipe of the sludge trap 12 serve for the passage of formation fluid.

The valve downhole centrifugal pump operates as follows.

When you turn on the installation under the influence of the flow of formation fluid, the ball 8 rises above the seat 2, opening the annular channel of the valve for the passage of formation fluid. When the pump stops under the action of a column of formation fluid, the ball 8 is lowered onto the seat 2, holding the column of fluid in the tubing string and preventing reverse rotation of the pump bodies (not shown) Mechanical inclusions contained in the reservoir fluid accumulate in the annular gap 14 formed by the housing 1 and a sludge trap pipe 12. This prevents clogging of the valve shutoff element and the upper pump section docked with it.

This design of the check valve improves the operational reliability of the borehole centrifugal pump.

Claims (3)

1. Valve of a borehole centrifugal pump, comprising a housing with an internal and external connecting thread and a saddle fixed in it, as well as a ball locking element located in the cylindrical channel of the axial displacement limiter, characterized in that the valve seat is provided with a seating groove under the sealing ring and is fixed relative to the body with a cylindrical sleeve and a washer with holes for the passage of formation fluid, and a pipe with a pipe screwed into it is installed in the upper part of the valve body sludge trap, provided with radial holes for the passage of formation fluid. 2. The downhole centrifugal pump valve according to claim 1, characterized in that the washer with holes for the passage of formation fluid is fixed from axial movement relative to the valve body by means of a spring ring. 3. The borehole centrifugal pump valve according to claim 1, characterized in that the pipe is mounted in the housing by means of a key with a spring ring.