SU1596129A1 - Deep-well sucker-rod pump - Google Patents

Abstract

The invention relates to a technique for deep well pumped oil production and can be used in the operation of oil wells by sucker-rod well pumps. The purpose of the invention is to increase the efficiency of the pump by reducing the hydraulic resistance of the flow part of the suction valve. The pump contains a cylinder 1, a hollow plunger 2 installed in it, a suction 4 and a discharge 3 ball valves forming the sub-plunger and pre-plunger cavities. The pump is equipped with an assembly that acts on the ball of the suction valve 4, made in the form of a rotary tab 7 and a gel spring 9 located in the housing 10 and installed with the possibility of interaction with the rotary tab 7. The internal cavity 11 of the housing 10 is hydraulically connected to the sub plunger cavity 12, and the internal The cavity 13 of the gelex spring is hydraulically connected by the bypass channel 14 to the cavity of cylinder 1. 2 Il.

Description

The invention relates to the technique of deep-well pumped oil and can be used in the operation of oil wells sucker rod pumps. The purpose of the invention is to increase the efficiency of the pump by reducing the hydraulic resistance of the flow

parts of the suction valve. The pump contains a cylinder 1. installed in it a hollow plunger 2, suction 4 and discharge 3 ball valves, forming a sub-plunger and pre-plunger cavities. The pump is equipped with an impact unit on the ball of the suction valve 4, made in the form of a swivel foot 7 and a telex spring 9 located in the housing 10 and installed with the ability to interact with the rotary foot 7. The internal cavity 11 of the housing 10 is hydraulically connected to the sub-plunger cavity 12, and the internal cavity The 13 spring of the spring is hydraulically connected by the overflow channel 14 to the cavity of the cylinder 1.2 Il.

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.1596129 A1

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1596129

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The invention relates to the technique of downhole oil production and can be

used in the operation of oil

wells sucker rod pumps.

The purpose of the invention is to increase the efficiency of the downhole pump rod by reducing the hydraulic resistance of the flow part of the suction valve.

1 shows a structural diagram of a downhole sucker-rod pump: FIG. 2 shows section A-A in FIG. one.

The downhole sucker-rod pump contains a cylinder 1, a plunger 2 installed therein, and a discharge valve 3 and a suction valve including a ball 4, a saddle 5 and a valve cage 6. The pump is equipped with an impact unit on the ball 4 of a suction valve made in the form of a rotary tab 7 mounted on an axis 8 driven by a telex spring 9. The impact unit is enclosed in a housing 10, the internal cavity 11 of which is hydraulically connected to the sub plunger cavity 12, and the internal cavity 13 of the telex spring 9 is hydraulically connected by a bypass channel 14 the cylinder space 1. The suction valve is located in the casing 15.

The pump works as follows.

At the beginning of the stroke of the plunger 2 down the pressure in the cavity of the cylinder 1 and in the internal cavity of the telex spring 9 is the same, since these cavities are connected by channel 14. In the internal space of the housing 10, the pressure is the same as in the internal cavity of the telex spring 9. In the absence of a pressure drop inside and outside the telex spring, the swivel foot 7 is set aside and does not act on the ball 4.

When the plunger 2 moves downward, the ball 3 of the injection valve is lifted and the fluid from the sub plunger cavity flows into the pre-plunger cavity.

When the plunger 2 moves upward, the discharge valve is closed and the pressure in the sub-plunger cavity decreases. At the same time, it decreases in the associated internal cavity of the housing 10, as a result of which under the action of a pressure drop in the internal cavity of the telex spring 9 and outside it, the latter is deformed and, rotating the axis 8, acts on the raised ball 4 of the suction valve, diverting it to the side from the flow part of the saddle 5 and cage 6. As a result, the hydraulic resistance of the suction valve is reduced.

After the plunger 2 passes through the holes in the wall of the cylinder 1 connecting the cavity of the cylinder to the bypass channel 14, the pressure in the internal cavity of the telex spring 9 decreases to pressure in the sub plunger cavity. As a result, the telex spring 9 returns to its original position and releases the ball 4, allowing it to sink to saddle 5

Claims (1)

Claim A downhole sucker-rod pump comprising a cylinder, a hollow plunger mounted therein and suction and discharge ball valves, respectively, located in the cylinder and plunger, which form the sub-plunger and supra-plunger cavities, in order to increase the efficiency by reducing the hydraulic resistance of the inlet portion valve, the pump is equipped with a node impact on the ball suction valve, made in the form of a swivel foot and a telex spring located in the housing and installed with the ability to interact with the rotary tab, while the internal cavity of the housing is hydraulically connected with the sub plunger cavity, and the internal cavity of the telex spring is hydraulically connected by a bypass channel with the cavity of the cylinder. 1596129 FIG!