SU393474A1 - DEEP ROLL PUMP - Google Patents

Description

one

Submersible sucker rod pumps are known for pumping fluid from bypassing and sanding wells, in the gap of a pair of plunger-cylinder of which lubricating fluid is fed from the oil chamber.

However, in known devices, after oil has been consumed from the oil chamber, it is not possible to lubricate the rubbing pair. As a result, their durability and endowment are reduced.

The purpose of the invention is to reduce the consumption of lubricating fluid.

To achieve this goal, the plunger of the pump is provided with two rows of working pair of holes with annular grooves extending into the gap zone. The upper row of holes is connected to the oil chamber, and the lower one is in communication with the upper part of the pressure chamber for introducing liquid purified from sand and water. The ratio of the flow sections of the upper and lower holes should be such that the pressure of the pumped liquid, which is injected into the gap of the working pair, is lower than the pressure of the lubricant introduced into the gap from the oil chamber.

This reduces the flow rate of the lubricant.

The drawings depict the described sucker rod pump.

The pump consists of an oil chamber 1, a hydraulic shutter jacket 2, a castle support 3, a lock 4, a cylinder 5, a hollow brush 6, a plunger 7 with two rows of holes 8 and 9, nms circular grooves, an oil separator W, a pipe L for the plunger disconnecting the - an effective ring 12, an injection 13 and a suction 14 valves. In the pipe 11 of the plunger, a window 15j is made and in the oil feeder - channel 16. With the plunger 7 running upwards the suction

the valve 14 opens and the delivery 13 closes. Fluid from the well enters the lower cavity of the pump cylinder. At this time, the lubricating fluid from the oil chamber 1 through the hollow brush 6, the oil feedwater 10 and the opening 8 and the pressure of the hydrostatic liquid column in the pipes enters the gap between the plunger and the cylinder. Since the differential pressure is L1 between the upper end of the plunger and the first row of holes

is absent, and the plunger pair of contaminated fluid located above the plunger is excluded from the gap. As the plunger moves downward, the suction valve 14 closes and the discharge valve 13 opens. The liquid from the lower cavity of the cylinder through the pipe 11 of the plunger through the window 15 and the longitudinal channels 16 enters the upper cavity of the pump cylinder, and then into the pumping

pipes. During the next stroke of the plunger

upwardly separated from water and sand, the oil under pressure from the hydrostatic liquid column from the cavity between the plunger and the pipe 11 enters the gap of the plunger pair through the holes 9 on the plunger and, together with the lubricating fluid, lubricates its rubbing surface. The oil pressure at the exit from the holes 9, due to the appropriate selection of their sizes, will be somewhat less than the pressure of the hydrostatic liquid column in the pipes.

Subject nor

A submersible sucker-rod pump for pumping liquid from watered and sand-bore wells with a supply to the desired zone of clearance of the working pair of the plunger-cylinder of lubricating fluid from the oil chamber, characterized in that, in order to reduce the flow of lubricating fluid, the plunger of the pump is equipped

two rows of holes with annular grooves extending into the gap zone of the working pair, the upper row of holes being connected to the oil chamber, and the lower row communicating with the upper part of the pump discharge chamber for

supplying the pumped liquid to the gap area of the working pair, and the ratio of the flow cross sections of the upper and lower rows of holes must be such that the pressure of the pumped liquid entering the gap

the working pair was lower than the pressure of the lubricant flowing into the gap.

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