SU1544955A1 - Gas-lift valve - Google Patents

Abstract

The invention relates to the extraction of oil. The goal is to increase the reliability of the valve by increasing the sealing ability. The valve includes a housing 1 with channels for the passage of a working agent, inside which a bellows 2 is installed. The latter forms with chamber 1 a chamber 3 filled with compressed gas. The stem-bolt 4 is concentrically located in the housing 1 with the possibility of axial movement rigidly connected to the bellows 2. A saddle 5 and a non-return valve 12 are installed under the stem-gate 4. surface 7. The surfaces of the housing 1 and the sleeve 6 in contact with the surface 7, on which the sealing rings 10 are installed, are made of a corresponding spherical shape. Under the action of a shock load from the side of the stem-gate 4, the saddle 5 tends to turn relative to the housing 1 so that the rod-gate 4 takes the position due to the first stroke. Rings 10 prevent leakage of the working agent through the gap between the saddle 5 and the body 1. 1 sludge.

Description

The invention relates to equipment used in oil production, in particular for gas lift installations.

The aim of the invention is to increase the reliability of the valve by increasing the sealing ability.

The drawing shows a diagram of a gas lift valve.

The gas lift valve contains a housing

1c channels for the passage of a working agent, inside which a bellows 2 is installed, forming with the housing 1 a chamber 3 filled with compressed gas concentrically located in the housing 1 with axial movement and rigidly connected with the bellows

2 rod gate M, under which a saddle 5 is installed, a sleeve 6 fixed in housing 1 above saddle 5, which is made self-aligning with a spherical side surface 7, with surfaces 8 and 9 of housing 1

and sleeves 6, in contact with the lateral surface of the seat 5, on which the sealing rings 10 are mounted, are made of a corresponding spherical shape. The sleeve 6, together with the spring ring 11, holds the seat 5 against axial movement. Under the saddle 5 in the housing 1 is installed a check valve 12.

The valve operates as follows.

Before the valve is lowered into the well, chamber 3 is filled with compressed gas. Under the action of gas in chamber 3, the stem-bolt b blocks the bore hole in the seat 5. At the same time, the latter is self-aligning in the housing relative to the stem A, moving spherical surface 7 bushings

0

five

thirty

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45

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6. In this position, the gas-lift valve is lowered into the well.

The agent injected into the annulus through the channels enters the housing 1 and acts on the effective area of the bellows 2. Compressing it, the working agent moves the stem-bolt k up and opens the hole in Seat 5 to allow the passage of the working agent. The working agent from the annulus through the check valve 12 enters the column lifting pipe wells, where it aerates the well fluid and brings it to the surface. When the pressure of the working agent in the annulus decreases, the valve closes. At the same time, the stem-bolt k is lowered onto the saddle 5. Under the action of a shock load from the side of the bolt stem k, the saddle 5 tends to rotate relative to the housing 1 so that the stem-bolt k takes the position due to the first stroke. Sealing rings 10 prevent leakage of the working agent through the gap between the seat 5 and the body 1.

The reliability of the gas-lift valve is enhanced by the fact that the valve has a sleeve with an internal spherical surface that provides self-alignment of the seat with a spherical side surface relative to the stem so that the rod at each stroke takes the position determined by the first blow. This reduces the surface area to be broken and reduces seat wear. Rubber o-rings absorb shock, thereby reducing seat wear.

The tightness of the valve is ensured by the fact that when per 5 1

In the course of the stroke, the contact surface of the seat is formed. As a result, the contact is made over the area, not along the line. The spherical surfaces of the sleeve and the seat provide displacement of the seat so that on subsequent blows the rod will occupy the same position.

Claims (1)

Invention Formula A gas-lift valve comprising a housing with channels for the passage of the working agent, inside which a bellows is installed, which forms with the housing a chamber filled with compressed gas, Y9556 concentrically located in the housing with the possibility of axial movement and rigidly connected with the bellows stem-gate, under which the seat and the check valve are installed, characterized in that, in order to increase its reliability by increasing the sealing capacity, it is equipped with a sleeve fixed in the housing above the seat, made self-aligning with a spherical side surface, with the surfaces of the housing and the sleeves in contact with the lateral surface of the saddle on which the sealing rings are mounted Are made of the corresponding spherical shape. ten 15 Compiled by V. Boryskin Editor N. Rogulich Tehred L. Oliynyk Order Circulation k6k VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR, Moscow, Zh-35, 4/5 Raushsk Nab. Production and Publishing Combine Patent, Uzhgorod, st. Gagarin, 101 Proofreader A. Obruchar Subscription