SU1656160A1 - Sucker-rod well pump - Google Patents

Abstract

The invention relates to the oil industry, in particular to the technique of oil production, and is intended primarily for pumping viscous liquids from wells. The purpose of the invention is to improve the efficiency of the pump when pumping viscous liquids. The borehole sucker-rod pump contains a plunger mounted in the cylinder — the suction and discharge valve assemblies provided with an upper diameter, the outer diameter of which is larger than the diameter of the working part of the plunger. The valve assemblies are made in the form of cylindrical spools, the discharge spool is equipped with a shock absorber installed in its upper part, and the intake valve is equipped with two shock absorbers installed in its upper and lower parts. The cylinder is provided with a drain channel located in its upper part. The cylindrical valve is provided with a threaded hole for securing a removable load. 2 hp f-ly, 3 ill.

Description

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The invention relates to the oil industry, to the technique of oil production, and is intended primarily for pumping a viscous fluid from a well.

The purpose of the invention is to increase the efficiency of the pump when pumping a viscous liquid.

Figure 1 shows the downhole sucker rod pump, cross-section, upper part; 2 - the same, middle part; on fig.Z - the same, the bottom part.

The downhole sucker-rod pump includes a cylinder 1 connected to a column of pump-compressor tubing 2 by a transfer coupling 3. In the upper part of cylinder 1 there is a drain channel 4 for removing fluid from the cavity of the pump-compressor tubing 2. A column of rods (not shown) is connected by a 5 cc housing 6 of the discharge valve assembly 7. in which

there is a cylindrical spool 8. In its upper part there is a shock absorber 9, and in the side walls of the housing 6 there are channels 10 and apertures 11. A plunger 12 is attached to the lower part of the housing 6 by means of a threaded connection, and there are 13 on the housing 6, the outer diameter of which is larger the working diameter of the plunger 12. To the lower part of the cylinder 1 by means of a transfer sleeve 14 is attached the housing 15 of the suction valve assembly 16, consisting of a sleeve 17 with side channels 18, inside of which is a cylindrical slide 19, fitted the upper 20 and lower 21 spring shock absorbers. The parts of the suction valve 16 are kept in working position by the cap 22 with side channels 23. In the lower part of the spool 19 there is a threaded hole 24. into which a removable load can be screwed.

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25. In the housing 15 is installed a rod 26, limiting the movement of the spool 19 up.

Well sucker rod pump works as follows.

As the plunger 12 moves upward, the spool 8 is in the lower position and closes the channels 10. The fluid above the discharge valve moves up through the tubing string 2. At the same time, the suction valve 16 opens, its spool 19 moves up and opens the side channels 18. The formation fluid through the side channels 23 and the side channels 18 enters the cavity of cylinder 1 under the plunger 12. When the suction valve 16 is opened, the valve 19 moves upwards, when it hits the rod 26, the absorber 20 absorbs kinetic my energy

As the plunger 12 moves downward, the suction valve 16 closes, its spool 19 moves downward under the action of the spring of the upper shock absorber 20, the pressure drop across the valve and the force of gravity of the load 25. The shock absorber 21 serves to absorb shock when the valve closes. the spool 8 is moved upwards, opening the side channels 10. The reservoir fluid from the cavity of the cylinder 1 through the hollow plunger 12 and the side channels 10, the holes 11 enters the internal cavity of the tubing string 2. When the valve cover 7 energy impact

spool 8 on sub 5 is absorbed by shock absorber 9.

If it is necessary to lift the tubing string 2, the plunger 12 is removed from the cylinder 1 with the help of the rod string. As a result, the channel 4 opens and the fluid filling the internal cavity of the pump-compressor pipes 2 flows out into the annular space.

Claims (3)

1. A borehole sucker-rod pump for raising the viscosity of the reservoir fluid containing a plunger mounted in the cylinder, provided in the upper part with a bore, the outer diameter of which is larger than the diameter of the plunger working part, suction and discharge valve assemblies, which are different in that increase pump efficiency when pumping a viscous fluid, valve assemblies are made in the form of cylindrical spools, the discharge spool is equipped with a shock absorber installed in its upper part, and the suction is provided with two shock absorber installed in its upper and lower parts. 2. Pump according to Claim 1, characterized in that the pump cylinder is provided with a drain channel located in its upper part 3. Pump according to Claim 1, characterized in that the spool of the receiving valve is provided with a threaded hole for securing a removable load. 1 J-k FIG. 2 23-21 25 hell fflsteJ