SU1555531A1 - Hydraulic drive of submerged piston-type pump - Google Patents

Abstract

This invention relates to a pumping technology. The aim of the invention is to simplify the design, increase reliability and reduce energy costs. The hydraulic actuator of a submersible piston pump contains a housing 2 mounted on the wellhead 1 with a hydraulic cylinder 3, in which the piston 5 with a rod 6 is located with the formation of a drive cavity 4, kinematically connected through a flexible rod 22 to a downhole piston of the submersible pump. With the ability to interact with the piston rod 6 of the piston 5 by means of the stops 9 and 10, a two-position spool valve 7 is installed, the spool 8 of which is made of a four-stroke type with the formation of upper, lower and additional flow cavities in the distributor 7. The drive cavity 4 through the outlet channel 11 of the distributor 7, its upper and lower flow cavities, the inlet and outlet channels are connected with the possibility of periodic communication with the pressure and drain lines 16 and 17. The pressure line 16 is connected via an additional input channel to the additional flow cavity of the spool valve 7 with the possibility of adjustable communication, and the additional flow cavity is connected via an additional outlet channel 21 to the drain line 17. 3 sludge.

Description

The invention relates to a pump engineering technique.

The purpose of the invention is to simplify the design, increase reliability and reduce energy costs.

Fig. 1 is a schematic diagram of the hydraulic drive of a submersible piston pump; Fig 2 - spool valve with the upper position of its spool; fig.Z - the same, with the lower position of the spool.

The hydraulic actuator of a submersible piston pump contains a housing 2 installed at the wellhead 1 with a hydraulic cylinder 3, in which the piston 5 with a rod 6 is located with the formation of a drive cavity 4, kinematically associated with a lower piston of a submersible pump in the borehole 1 (not shown).

The two-way spool valve 7 is installed vertically with the possibility of its spool 8 interacting with the piston rod 6 of the hydraulic cylinder 3 with the help of 6 stops 9 and 10 located on the rod with its extreme positions and periodically communicating the drive cavity 4 through the outlet channel 11 of the distributor 7, its upper and the lower flow lanes 12 and 13, the inlet and outlet channels 14 and 15, respectively, with pressure and discharge lines 16 and 17.

A cavity 18 located above the piston 5 of the cylinder section 3 of the cylinder 3 is in communication with the atmosphere.

The spool valve 7 is made with spool 8 of the four-way type with the formation in the distribution

five

0

35

0

d5 50

40

55

body 7 additional flow cavity 19 and additional input and exhaust channels 20 and 21.

The delivery line 16 is connected via an additional input channel 20 to the additional flow cavity 19 of the spool valve 7 with the possibility of adjustable communication, the additional passageway 19 is connected via an additional outlet channel 21 to the drain line 17 (not shown), and the piston rod 6 of the piston 5 is kinematically connected It is connected with the pump piston using flexible cable 22. The message of the submersible pump with the consumer is presented in a simplified form.

The piston 7 may have a pointer 23 of its position in the hydraulic cylinder 3.

The spool 8 of the distributor 7 has a retainer 24 of its extreme positions, and can also be made with interchangeable washers 25 of adjustable total thickness.

The pump piston can be adapted to change its total weight with, for example, removable piston-mounted weights (not shown).

Hydraulic submersible piston pump works as follows.

When filling the drive cavity 4 of the hydraulic cylinder 3 with the working fluid and moving the piston 5 with the rod 6 to their upper position, the valve 7 of the distributor 7 moves together with the rod 6 of the stop 10 and interacts with the spool 8 of the distributor, which then switches to the upper position.

As a result of the movement of the spool 8 in the distributor 7 to the upper

The position of the drive cavity 4 through the outlet channel 11, the lower flow cavity 13 and the outlet channel 15 communicates with the drain line 17. At the same time, the pressure line 16 through the additional input channel 20, the additional flow cavity 19 and the additional outlet channel 21 are also connected to the drain line 17 .

At this time, the working fluid from the drive cavity 4 of the hydraulic cylinder 3 is displaced by the piston 5 into the drain line 17, and the piston of the submersible pump, together with the rod 6 and the flexible pull 22, are lowered in the borehole 1.

The pressure arising in the register 4 cavity, as a result of which the working fluid is displaced into the drain line 17, as well as the speed of lowering the piston of the submersible pump in the borehole 1 down can be adjusted by using replaceable loads mounted on the piston of the submersible pump.

When approaching the piston 5 with the rod 6 to their lower position, the interaction of the valve 7 with the valve 6 of the stop 9 and the valve 8 of the distributor 7 takes place.

switches to the down position.

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As a result of the movement of the spool 8 in the distributor 7 to the lower position, the drive cavity 4 through the output channel 11, the upper flow cavity 12 and the input channel 14 communicates with the pressure line 16. At the same time, the pressure line 16 can be in parallel communicated, if necessary, via an additional input channel 20 , an additional flow cavity 19 and an additional outlet channel 21 with a drain line 17. The connection of the drain line 17 to the pressure line 16 and the flow through bypass

ten

15

20

with the displacement of the pumped liquid to the consumer.

When the piston 5 approaches the rod 6 to their upper position, the valve 10 of the stop 10 with the valve 8 of the distributor 7, which is moved together with the rod 6, interacts and again switches to the upper position. Further, the cycle of operation of the hydraulic drive is repeated.

Claims (1)

Invention Formula A hydraulic actuator of a submersible piston pump containing a housing installed at the wellhead with a power hydraulic cylinder in which are located a pore with a rod forming a drive cavity, kinematically connected with a submersible pump piston located downhole in the well, installed a vertically two-way spool valve, 25 and a drain line, wherein the valve is made with the upper and lower flow cavities, inlet, outlet and outlet channels and is installed with the possibility of the spool interacting with the piston rod of the hydraulic cylinder with the stops located on the rod at its extreme positions and periodically. messages of the drive cavity through the outlet channel, the upper and lower flow cavities 35 of the distributor, inlet and outlet channels, respectively, with pressure and drain lines, and the cavity located above the piston of the hydraulic cylinder communicates with the atmospheric one, characterized in that, in order to simplify the design, increase reliability of operation and reduce energy costs, the spool valve has four-way valve a lottery with the formation of an additional flow cavity and with additional inlet and outlet channels, the pressure pipe is connected through an additional inlet channel to thirty 40 This is through an additional entrance - 50 additional flow cavity eo0 five 0 with the displacement of the pumped liquid to the consumer. When the piston 5 approaches the rod 6 to their upper position, the valve 10 of the stop 10 with the valve 8 of the distributor 7, which is moved together with the rod 6, interacts and again switches to the upper position. Further, the cycle of operation of the hydraulic drive is repeated. Invention Formula A hydraulic actuator of a submersible piston pump containing a housing installed at the wellhead with a power hydraulic cylinder in which a piston with a rod is arranged to form a drive cavity, kinematically associated with a lower displacement pump piston located in a well, installed a vertically double-slide spool valve 5 and a drain line, wherein the distributor is made with upper and lower flow cavities, inlet, outlet and outlet channels and is installed with the possibility of the spool interacting with the piston rod of the hydraulic cylinder with the stops located on the rod at its extreme positions and periodically communicating the drive cavity through the output channel, the upper and lower flow cavities 5 of the distributor, inlet and outlet channels respectively with pressure and drain lines, and the cavity located above the piston of the hydraulic cylinder communicates with the atmospheric one, characterized in that, in order to simplify the design, increase reliability of operation and reduce energy costs, the spool valve is made with a four-way valve 5 with a lanyard with the formation of an additional flow cavity and with additional inlet and outlet channels, the pressure pipe being connected through an additional inlet channel to 0 0 The working fluid supply 20 can be adjusted by using replacement washers 25. When piston 5 moves in hydraulic 3 upward, simultaneous displacement of 1 piston of a submersible pump located in the borehole occurs. a gutter distributor with the possibility of adjustable communication, an additional flow cavity is connected via an additional outlet channel to the drain line, and the piston rod is kinematically connected with the pump piston using a flexible rod. 9 (11.2