SU987175A1 - Well sucker rod pump - Google Patents

Description

(54) WELL BAR PUMP

one

The invention relates to technology for the extraction of oil, in particular borehole sucker-rod pumps, and can be used in the petroleum industry.

a well pump is known, which contains a stationary shaft connected to a column of pump tubes and covered by a movable cylinder associated with a column of pump rods, as well as suction and discharge valves 1.

The disadvantages of the known downhole sucker-rod pump with a movable cylinder are the limited internal diameter of the tubing, the cross-sectional dimensions of the pump and the through holes of the suction and discharge valves, which create high flow resistances of high-viscosity and bitumen oil, without ensuring that the pump chamber is filled only due to the vacuum created in the pump chamber during the course of the rolling cylinder upwards, which makes it impossible to extract viscous and bituminous oils known m pump.

The purpose of the invention is to increase the filling ratio during well operation, with viscous and bituminous oil.

This goal is achieved by the fact that the plunger is made with diametrically opposed slots, and the connection of the cylinder to the column of pump rods is made in the form of a stationed canal in the plunger with a fixed diameter across the slots. The cylinder is made of composite, and its individual parts are connected by a coupling in which the diameter is fixed.

1Q. In the drawing a schematic representation of a borehole sucker-rod pump, general view, section.

The downhole sucker-rod pump comprises a stationary plunger 1 associated with the column of pump tubes 2 and covered

15 by a movable cylinder 3 connected to a column of pump rods 4, as well as a suction valve 5 placed in the cylinder 3 and a pressure valve 6 placed in the plunger 1. Plunger I is made with

2Q are diametrically oppositely located by the slits 7, and the connection of the cylinder 3 with the column of pump shtang 4 is made as a glass 8 placed in the plunger I with a diameter 9 installed in it, passed through the slits 7. Cylinder 3 with libino.ineii pump , and its terms 11) 1st part 10 II and are connected by a clutch 12, in which is fixed the nickle 9 -.

Cylinder 3 with a suction valve 5 on the lower cylinder is provided with an orifice 13, supporting service; 1 in the cylinder cavity and in its lower position with the annulus of the well (not shown) directly below the plunger m 1 and the openings 14, indicating the bottom of the pump pipes 2 with the annular space of the well with the extreme lower position of qi; 11 ndra 3.

The connecting rod of the pump rod 4 for the movement of the cylinder 3 downwards is composed of the cargo rod.

The centralizers 15 mounted on the sleeves 12 II mu () max 16 serve to ensure the operation of the pump without friction against the casing joint / union (not shown).

(well bore shtangovy pump works with, .1 cm1

 As the cylinder 3 moves downward under the force of gravity of the column of cargo rods 4, iodine ram 1 forms a rarefied space, the suction clan 5 is opened and fluid from the well naste into the rarefied space. Alternately) the change of movement of the cy.shndra 3 with the suction open to / 1 ananano.m 5 towards the flow of the fluid from the well into the bottom of the well 3.

This connection of the cylinder 3 n pumping 1 ntangam 4, nrn of which is the initial movement of the valve with the open suction valve 5 towards the horniness of the well into the rarefied space under the plunger 1 at a downward stroke, (Provides a slower flow rate of fluid (rpm in shchinchdr 3 its better filling is due both to the rarefaction of the node n; | unzhe | 1о.m I, and due to the movement of the cylinder against the flow of the liquid but from the well into the rarefied space. Also, the counter-movement of the cylinder 3 to the flow of the liquid into the cavity of the cylinder, eliminates the long-term effect of vacuum on the intake fluid and those.m most reduces its degassing in the cavity of the cylinder, which also improves the operation of the pump.

IIi) ii the lower position of the cylinder 3, the cavity of the cylinder 3 is communicated with the well pipe space below the well, below: 1) dr1.1 1 through the holes 13. The slit fluid through the holes 13 enters the floor of the cylinder 3, ensures its filling and unstressed pumping installation n nasemnogo equipment.

When the cylinder 3 moves downwardly, the valve 6 of the plunger 1 is closed.

1 || during the course of the cylinder 3 upward the suction clan 5 under the pressure of the liquid in the cylinder 3 is closed. Hole 13 is closed by an iplug 1, the discharge valve 6 of the plunger 1 opens. The fluid drops to the nudity of the plunger 1 n from there through the openings of the glass 8 into the pump-compressor pipes 2.

The connection of the rolling cylinder 3 of the pump with a column of pumping shtangs 4 transversely 9 and passing through the fixed plunger 1 allows the well cross sections not limited to the borehole pump to be used for the operation of wells with viscous and bituminous oil. known sucker rod pumps, the internal diameter of the pump tubes, and the movement of the cylinder 3, due to the specified connection of the cylinder with the pump column

the boom boosts the speed of the nostril into the cylinder bed of viscous and bituminous oil and thereby contributes to the increase in the filling ratio of the pump. - The presence of an aperture 13 communicated with the cavity of the cylinder 3 with the annular space directly at the node by the plunger 1 at the lower position of the cylinder contributes directly to the cavity of the cylinder cavity with the annular fluid, which achieves unstressed operation of the pump unit, surface equipment and an increase in the interval of the well period.

The presence of holes 14 in the cylinder 3, coinciding in the lowest position with the slot 7 in the plunger 1 and ensuring the discharge of fluid from the column of pump tubes

without the use of additional devices, it improves the working conditions of workers in capital overhaul and borehole repair services when lifting pumping pipes.

Claims (2)

1. A borehole sucker-rod pump containing a stationary plunger associated with the tubing string and encompassing a movable cylinder, associated with a pumping column, as well as suction and discharge valves, characterized in that, in order to increase the filling ratio in the operation of viscous and bituminous oil wells, it is complied with the cutter, many diametrically opposite, and the connection of the cy.chinder with the column of pump rods is made in the form of a glass placed in a plunger with a diameter of through norezn. 2. Pump p. I, characterized in that the cylinder is made integral, and its individual parts are connected by a coupling in which the diameter is fixed. Sources of information taken into account in the examination I. Muravev I.M., and Mishchenko I.T. Nasosna well operation abroad. M., “Nedra, 1967, p. 17-18, fig. 15.