RU135017U1 - DOUBLE ACTION BELL PUMP - Google Patents

Abstract

1. Double-acting sucker-rod pump containing a cylinder in which a hollow plunger is installed with the possibility of reciprocating movement, forming a sub-plunger and supra-plunger cavity, lower suction and discharge valves are installed in the sub-plunger cavity, and upper suction and discharge valves are different in the supra-plunger, characterized the fact that the upper and lower discharge valves are poppet type, the locking elements of which are installed on the plunger. 2. The sucker rod pump according to claim 1, characterized in that it is equipped with a whipping valve installed in the sub-plunger cavity between the latter and the annulus.

Description

The utility model relates to volumetric displacement machines used in the oil industry, in particular to double-acting sucker rod pumps for lifting liquids from great depths.

Known:

borehole sucker-rod installation with a double-acting pump (patent RU 2364708, IPC E21B 43/00 (2006.01), publ. 08.20.2009), consisting of a cylinder with a lower discharge valve, upper and lower suction valves, a plunger installed in the cylinder with the possibility of return - progressive movement and having an upper discharge valve;

double-acting sucker-rod pump (patent RU 2436996, IPC F04B 47/00 (2006.01), publ. 12/20/2011), comprising a cylinder in which a hollow plunger is installed with the possibility of reciprocating movement, forming a sub-plunger and supra-plunger cavity, in the sub-plunger cavity lower suction and discharge valves are installed, and in the supraplunger, upper suction and discharge valves are installed.

The disadvantage of such pumps is their low reliability, which is explained by the possibility of failure of pressure valves during operation of the pump in wells, complicated by the formation of asphalt-tar and paraffin deposits.

The closest to the claimed and adopted as a prototype is a double-acting sucker rod pump (patent RU 2436996).

The objective of the proposed utility model is to increase the reliability of the pump by ensuring the reliability of operation of the discharge valves.

The problem is solved by improving the double-acting sucker-rod pump containing a cylinder, in which a hollow plunger is installed with the possibility of reciprocating movement, forming a sub-plunger and supra-plunger cavity, lower suction and discharge valves are installed in the sub-plunger cavity, and upper suction and discharge are installed in the sub-plunger valves.

This improvement consists in the fact that the upper and lower discharge valves are disk-shaped, the locking elements of which are installed on the plunger, which ensures reliable opening and closing of the discharge valves and their coordinated operation during the reciprocating movement of the plunger, because forced valve data.

In addition, the sucker rod pump can be equipped with a whipping valve installed in the sub-plunger cavity between the latter and the annulus, which allows draining the liquid from the tubing string during pump disassembly and thereby improves the ease of disassembly.

The utility model is illustrated by drawings, in which Fig. 1 shows a diagram of the proposed pump at the lowermost position of the plunger, Fig. 2 - the same when the plunger moves upward, Fig. 3 - the same with the extreme upper position of the plunger, Fig. 4 - the same when the plunger moves down.

The double-acting sucker rod pump contains a cylinder 1, in which a hollow plunger 2 is installed with the possibility of reciprocating movement, forming a sub-plunger 3 and a supra-plunger 4 cavity. In the subplunger cavity 3, the lower suction 5 and pressure 6 valves are installed, and in the subplunger cavity 4, the upper suction 7 and pressure 8 valves are installed. The upper 8 and lower 6 discharge valves are poppet type, the locking elements 9 and 10 of which are installed on the plunger 2. Position 11 denotes the lower side openings of the plunger 2, position 12 - the hollow stem, position 13 - the pressure valve, position 14 - the tubing string, position 15 - the upper lateral openings of the plunger 2. The valve 13 serves to exclude the influence of the liquid column on the operation of the pump valves (by cutting off the liquid column in the tubing above the pump), as well as to prevent mechanical impurities from entering the hollow plunger when stopped at wasp.

The sucker rod pump is equipped with a whipping valve 16 mounted in the sub-plunger cavity 3 between the last and annular space for draining the liquid from the tubing string when lifting the pump. Position 17 denotes a cylinder for sealing the hollow rod 12, position 18 - anchor device for fixing the cylinder 17.

The proposed sucker rod pump operates as follows.

The sucker rod pump is installed in the well at the required installation interval. The plunger 2 is moved by a column of rods connected to the drive (not shown). When the rod string moves up, the lower suction valve 5 opens, the produced fluid enters the sub-plunger cavity 3, the lower discharge poppet valve 6 is closed (Figure 2). The upper suction valve 7 is closed. After reaching the upper point (Figure 3), the rod string moves down (Figure 4), the suction valve 5 closes, the lower discharge poppet valve 6 opens, the produced fluid through the lower side holes 11 of the plunger 2 enters the hollow rod 12 and then through the open discharge valve 13 enters the tubing string 14. In this case, the upper discharge poppet valve 8 is closed and the upper suction valve 7 is open, the produced fluid enters the plunger cavity 4. When the rod string moves up, the plunger 2 moves up, the lower The fifth suction valve 5 opens, the lower pressure poppet valve 6 closes, the upper pressure poppet valve 8 opens, and the produced fluid is displaced from the supraplunger cavity 4 by the plunger 2 and flows through the upper holes 15 of the plunger 2 into the hollow rod 12. Then, when the rod string moves down through open discharge valve 13, the produced fluid is forced into the tubing string 14 and onto the surface.

Thus, during operation of the sucker rod pump, the produced fluid is supplied, both during the course of the rod string and the associated plunger 2 upward, and during the downward stroke. At the same time, due to the installation of locking elements 9 and 10 on the plunger 2 and execution of the discharge valves 6 and 8 plate-shaped, they are reliably opened and closed when the plunger 2 is moved.

During dismantling, the internal part of the pump, consisting of a hollow rod 12 and a plunger 2, is removed along with the column of pump rods when moving up. The anchor device 18 of the cylinder 17 is disconnected. A metal bar “scrap” is thrown into the tubing string from the mouth, which flies through the internal cavity of the pump and breaks the hollow pin of the pin valve 16. After breaking the pin, the borehole fluid is drained from the tubing string into the annulus when the pump is lifted.

Claims (2)

1. Double-acting sucker rod pump containing a cylinder in which a hollow plunger is installed with the possibility of reciprocating movement, forming a sub-plunger and supra-plunger cavity, lower suction and discharge valves are installed in the sub-plunger cavity, and upper suction and discharge valves are different in the supra-plunger, characterized the fact that the upper and lower discharge valves are poppet type, the locking elements of which are installed on the plunger. 2. The sucker rod pump according to claim 1, characterized in that it is equipped with a whipping valve installed in the sub-plunger cavity between the latter and the annulus.

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