RU2712567C1 - Downhole sucker-rod pump for production of products with gas factor - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil industry and can be used for oil production at high content of gas in pumped liquid. Pump for product extraction with gas factor includes cylinder with hollow plunger in it, in lower part of which there is installed a pressure valve. Suction valve is arranged at pump chamber bottom. Gas valve consists of case with seat and ball. From below the cylinder is equipped with a shank with a packer installed above the productive formation. Valve body is installed with a seat outside in the radial channel of the shank under the packer. Ball is pressed to seat by spring, and seat is made with possibility of longitudinal tight movement relative to housing with controlled pressing through spring ball so that at stroke of plunger upwards relative to cylinder valve passes gas into shank end and further into cylinder of pump in volume of not more than ¼ of working volume of cylinder.

EFFECT: invention allows removing gas from under-packer space by means of an adjustable valve, simplifying the design.

1 cl, 2 dwg

Description

The invention relates to the oil industry and can be used for oil production with a high gas content in the pumped liquid.

A well-known sucker-rod pump (patent for IM RU No. 125270, IPC F04B 47/00, published on February 27, 2013 in Bull. No. 6), comprising a cylinder with a hollow plunger located in it, in the lower part of which there is a discharge valve, a pump chamber with a suction valve and a gas bleed valve, wherein a gas valve is used as a gas bleed valve equipped with a delay unit for closing it, while the delay valve for closing the discharge valve is made in the form of a pusher interacting with a shut-off element of the pressure valve and connected to the hollow plunger with the possibility of longitudinal movement relative to the hollow plunger.

The disadvantages of this pump are the low coefficient of performance (Efficiency) associated with the uncontrolled opening of the discharge valve using the delay unit and the difficulty of adjusting the pusher, since the properties of the pumped liquid may differ during operation of the pump.

The closest in technical essence and the achieved result is a borehole sucker rod pump (patent RU No. 2440513, IPC F04B 47/00, published on January 20, 2012 in Bull. No. 2), containing a cylinder with a hollow plunger placed in it, in the lower part of which is installed a discharge valve, a pump chamber with a suction valve in the lower part, while the pump is equipped with a bypass channel with a float valve, made with a shut-off float element and a seat located above it, while the cylinder is stepped on the side of the inner surface, a transfer channel with a locking float element is made in the lower part of the lower stage of the cylinder above the pump chamber, moreover, one channel hole is connected to the upper part of the pump chamber, and the other channel hole is connected to the well.

The disadvantages of this pump are the difficulty of manufacturing a stepped cylinder from the inner surface of the cylinder with a precisely placed channel, a narrow scope, since there is no possibility of gas removal from the under-packer space, and for each well a special stepped cylinder must be made.

The technical task of the proposed invention is the creation of a simple and universal design of a borehole sucker-rod pump for production of products with a gas factor, allowing to divert gas from the tanning space using an adjustable valve.

The technical problem is solved by a borehole sucker rod pump for production of products with a gas factor, including a cylinder with a hollow plunger placed in it, at the bottom of which a pressure valve is installed, a pump chamber with a suction valve at the bottom and a gas valve consisting of a body with a seat and a ball.

рабочего объема цилиндра.What is new is that the cylinder is equipped with a shank from the bottom with a packer installed above the reservoir, and the valve body is mounted with the saddle outward in the radial channel of the shank under the packer, the ball being spring-tightened to the seat and the seat made with longitudinal tight movement relative to the body with adjustable compression through the spring ball so that when the plunger moves upward relative to the cylinder, the valve passes gas into the liner and then into the pump cylinder in a volume of not more than

cylinder displacement.

In FIG. 1 shows a diagram of a valve installation as part of a borehole sucker rod pump.

In FIG. 2 shows a diagram of a gas valve - View A of FIG. 1.

A well sucker-rod pump for extraction of products with a gas factor, including cylinder 1 (Fig. 1) with a hollow plunger placed in it, at the bottom of which a discharge valve is installed, a pump chamber with a suction valve at the bottom (not shown) and a gas valve, consisting from the housing 2 with the seat 3 and the ball 4. The cylinder 1 is equipped with a liner 5 with a packer 6 installed in the bore 7 above the reservoir 8. The valve housing 2 is mounted with the saddle 3 outward in the radial channel 9 of the liner 5 under the packer 6. Ball 4 (Fig. . 2) pulled to the saddle 3. a spring 10. The seat 3 is made with the possibility of longitudinal tight movement (for example, using thread 11) relative to the housing 2 with adjustable compression through the ball 4 of the spring 10 (selected empirically) so that when the plunger moves upward relative to the cylinder, the valve passes gas into the shank 5 ( Fig. 1) and further into the cylinder 1 of the pump in a volume of not more than Va of the working volume of the cylinder 1.

Structural elements and technological connections that do not affect the operability of the device, in FIG. 1 and 2 are not shown or shown conventionally.

The device operates as follows.

рабочего объема цилиндра 1 (фиг. 1), то он легко выводится из цилиндра 1 в при ходе плунжера вниз через нагнетательный клапан практически не мешая дальнейшей работе насоса (выбрано эмпирическим путем) до следующего поступления газа из подпакерного пространства скважины 7. При необходимости работы на других месторождениях газовый клапан можно регулировать под необходимы условия сжатием или ослаблением пружины 10 (фиг. 2).To the cylinder 1 (Fig. 1) of the pump, a shank 5 with a packer 6 and a gas valve is connected from below. Based on the experience of operating such wells 7 with a longitudinal displacement of the seat 3 (Fig. 2) along the thread 11 relative to the housing 2, the spring 10 is pressed through the ball 4 so that during the operation of the pump, the gas enters the cylinder 1 (Fig. 1) no more than no more than Va of cylinder displacement 1. Assembled, the pump with the liner is lowered into the well 7, after which the packer 6 is installed above the reservoir 8. The pump is started using the wellhead drive and rods (not shown) for production of the formation 8 with the gas factor . During production, gas is released from the product and accumulated in the well under the packer 6, exerting pressure on the ball 4 of the gas valve, which does not allow unauthorized supply of gas from the shank 5 to the inlet of the pump cylinder 1 by pressing the ball 4 (Fig. 2) by a spring 10 to the saddle 3. After accumulation of a critical volume of gas under the packer 6 (Fig. 1), during the plunger stroke upward relative to the cylinder, a negative pressure is created in the liner caused by the selection of products into cylinder 1. At the same time, due to pressure drop, spring 10 (Fig. 2) under the action of ball 4 shrinks, ball 4 away um from the seat 3 by passing the necessary amount of gas into the liner 5. As the gas enters the volume of no more than no more than

of the working volume of cylinder 1 (Fig. 1), it is easily removed from cylinder 1 during plunger downward through the discharge valve practically without interfering with further pump operation (empirically chosen) until the next gas flow from the sub-packer space of the well 7. If necessary, work on in other fields, the gas valve can be adjusted to the necessary conditions by compressing or loosening the spring 10 (Fig. 2).

The proposed downhole sucker rod pump for gas production is simple and versatile, as it allows gas to be removed from the tanning space using an adjustable valve.

Claims (1)

A downhole sucker rod pump for extraction of products with a gas factor, including a cylinder with a hollow plunger placed in it, at the bottom of which a pressure valve is installed, a pump chamber with a suction valve at the bottom and a gas valve consisting of a housing with a seat and a ball, characterized in that the bottom cylinder is equipped with a shank with a packer installed above the reservoir, and the valve body is mounted with the saddle outward in the radial channel of the shank under the packer, and the ball is spring-loaded to the seat, and the seat is made but with the possibility of longitudinal movement relative to the sealed housing with an adjustable spring preload through the ball, so that when the plunger during upward relative to the cylinder valve allows gas to the shank and further to the pump cylinder in a volume of not more than ⅟4 stroke volume.

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