SU1665079A1 - Sucker-rod pump - Google Patents

Abstract

The invention makes it possible to increase the efficiency in the operation of a downhole sucker-rod pump by improving the cleaning of the filter surface. In the lower part of the cylinder 1 is placed a suction valve 2. In the cylinder 1 there is a hollow plunger 3 with an injection valve 4. Under the valve 2, an anti-sandwich filter 5 is installed. a plunger 3 with the possibility of a return bypass of a part of the suction fluid for washing the filter 5. The sleeve 6 is made in the form of a plunger 8 installed with the possibility of limited axial movement. On the plunger 8 is installed element 7. 1 Il.

Description

(21) 4733010/29 (22) 25 08 89 (45) 07.23.91. B yul N 27

(71) Kazakh State Research and Design Institute of the Petroleum Industry

(72) V.K. Arapinsky, VF Troitsky, V.V. Ulanov and B. Kh. Akopov (53) 621.651 (088.8)

(56) Copyright USSR No. 383875, cl. F 04 B 47/00, 1970.

(54) WELL BAR PUMP

(57) The invention improves the efficiency in operation of a downhole sucker-rod pump by improving the cleaning of the filter surface. In the lower part of cylinder 1 a suction valve 2 is placed. In cylinder 1 there is a hollow plunger 3 with a discharge valve 4. 2 is made in the form of a sleeve 6 and a ball-type closure element 7 placed under the cylinder 1, mounted under the plunger 3 with the possibility of a reverse bypass of a part of the intake fluid for washing the filter 5. The sleeve 6 is made ena in the form of a plunger 8. installed with the possibility of limited axial movement. On the plunger 8 mounted element 7, 1, or

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The invention relates to a technique for oil production, in particular, to well pump pumps, and can be used in the oil and gas industry when pumping formation fluids from a well.

The purpose of the invention is to increase the efficiency in operation by improving the cleaning of the filter surface of the filter.

The drawing schematically shows a downhole sucker rod pump, a general view.

The borehole pump contains a cylinder 1 with a suction valve 2 located in its lower part, a hollow plunger 3 located in a cylinder 1 with a discharge valve 4 and an anti-sand filter 5 installed under the suction valve2 and the suction valve 2 is designed as a sleeve in the cylinder 2 6 and a ball-type locking element 1 installed under the hollow plunger 3 with the possibility of bypassing a part of the suction fluid for flushing the sand screen 5. The boom 6 is made as an additional plun A tire 8 installed with limited axial movement between two - lower and upper ring stops 9 located in the cavity of the cylinder 1 along its ends, the locking element 7 of the ball type being placed on an additional plunger 8. The cylinder 1 is connected to the column of pump tubes 10, and a hollow plunger 3 - with a column of pump rods 11.

The pump works as follows. When the hollow plunger 3 moves upward, the discharge valve A is closed, a vacuum is created in the cylinder 1. Under the action of the pressure differential, the additional plunger 8 rises to the extreme upper position of interaction with the upper annular stop 9 of the cylinder. At this moment, the suction valve 2 opens and the formation fluid through the sump sand filter 5, the lower part of the cylinder 1, the cavity of the additional plunger 8 and the opened suction valve 2, the locking element 7

ball type which is placed on the additional plunger 8, enters the sub-plunger cavity of the main plunger 3 of the cylinder 1.

When the hollow plunger 3 moves downward, the discharge valve 4 remains closed until the additional plunger 8 descends to the lower annular abutment 9. A reverse flow occurs.

the reservoir fluid from the pumping chamber of the cylinder 1 of the pump, the volume of which is equal to the volume described by the additional plunger 8 as it moves down through the sandwich filter 5. After fitting the additional plunger 8 to the lower stop 9 of the cylinder 1, the discharge valve 4 opens and the formation fluid from the sub-plunger cavity the cylinder 1 of the pump is bypassed into the pumping column

pipes 10.

The performance of the downhole sucker-rod pump should be set higher than necessary by the amount of performance loss spent on

washing the sand screen 5.

Claims (1)

The Invention Formula the valve is made in the form of a spherical-type sleeve and a locking element in the cylinder, mounted under the hollow plunger with the option of bypassing a part of the intake fluid washing the pre-sand filter, which is based on the fact that, in order to increase operational efficiency by improving the cleaning of the filter surface of the filter, the sleeve is made in the form of an additional plunger installed with limited axial movement on which the ball-type locking element is located.