SU1028887A1 - Well bore-hole pump - Google Patents

Description

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sj The invention relates to a nautical construction, a submersible borehole pump, and can be used in oil production fields, in animal husbandry, and other public goods for pumping fluids from wells. Well pumps are known that contain a housing with a cylinder and a piston, suction and injection valves, and the suction valve is installed in the side flap of housing 13. There are drawbacks of this pump with lateral arrangement of the valve, and the possibility of accumulation in the upper part of the cylinder, the gas released from the liquid, which forms an air cushion and, consequently, leads to a decrease in pump performance. Also known is a deep well pump, comprising a cylinder with a plunger, injection and suction valves, the latter of which has a guide bushing and a subvalvular cavity communicated by means of channels located in the wall of the cylinder with a well, and a tubing column 2. The disadvantage A known pump is that gas released from a liquid enters the cylinder and, accumulating in its upper part, forms a gas cushion, which, occupying a part of the working volume, reduces the efficiency of the pump. In addition, when dismantling the pump, it is difficult to drain the liquid remaining in the tubing string. As a result, the efficiency of the pump is reduced. The purpose of the invention is to increase the efficiency of the pump. The goal is achieved by the fact that in a deep borehole pump containing a cylinder with a plunger, an injection and a suction valve, the latter of which has a guide sleeve and a subvalvate cavity, communicated with channels located in the wall of the cylinder, with a well and a tubing The pipes, together the subvalvular cavity with the borehole, are located in the upper part of this cavity and are formed by circular holes. In addition, the suction valve is provided with a retainer for engagement in the extreme upper position with the guide sleeve. The drawing shows the described pump. The pump contains a cylinder 1 with a plunger 2, discharge and suction valves 3 and 4, respectively. The last of them has a guide sleeve 5 and a sub-valve cavity 6, communicated with channels 7 located in the wall of cylinder 1 with a well (not shown, and tubing string (not shown). Channels 7, indicating the subvalvular cavity 6 with a well is located in the upper part of this cavity 6 and is formed by radial holes. The suction valve 4 is provided with a locking device 8 for interacting in its extreme upper position with the guide sleeve 5. The suction valve 4 is equipped with a bore 9. In the cavity and 1, the working chamber 10 is executed. The pump operates as follows: Plunger 2 performs reciprocal movements in the cylinder 1. A periodic change in the volume of the working chamber 10 occurs. The pumped liquid is sucked into it from the well through the suction valve 4 with increasing volume and is pumped to the consumer through The discharge valve 3, when the volume of the chamber 10 decreases. At the discharge stroke, when the suction valve 4 is closed, gas evolving from the pumped liquid accumulates in the cavity 6 under it. This gas rises into the upper part of cavity b and is removed from it through the channels 7 back into the well. Thus, during the suction stroke at the time of opening the suction valve 4, the gas does not enter the chamber 10, which is almost completely filled with the pumped liquid. As a result, a gas cushion is not formed in the working chamber 10. The harmful deformation of the liquid and the gas during the injection stroke is reduced, which reduces the volume flow of the pump. Thereby, an increase in the volume feed is achieved. When a pump is dismantled into the well from a special priming pump (the drawing does not show pumping fluid with a flow rate greater than the maximum instantaneous flow rate developed by the pump. Under the effect of the increased pressure drop that occurs with a larger flow rate through the suction valve 4, it rises to the extreme upper position, where it is fixed to direction 1; sleeve 5 with the help of clamp 8, the liquid from the tubing string is discharged into the well, and the pump is easily removed without additional belt, the energy effort

to drain the fluid and dismantled by noso-compressor tubes.

To bring the pump into operation, the plunger 2 is gently lowered below the lower operating position.

at the same time it presses on the firing pin and releases the intake valve 4.

Increasing the volumetric flow and simplifying the dismantling of the pump generally improves its efficiency.

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Claims (2)

(57) '1. DEPTH WELL PUMP, containing a cylinder with a plunger, discharge and suction valves, the last of which has a guide sleeve and a subvalve cavity communicated by means of channels located in the cylinder wall with a borehole and a tubing string, characterized in that, In order to increase efficiency, the channels communicating the subvalvular cavity with the well are located in the upper part of this cavity and are formed by radial holes. 2. Pump pop. ^ characterized in that the suction valve is provided with a latch for interaction in the highest position with the guide sleeve.