SU1214912A1 - Apparatus for controlling the work of intermittent gas-lift installation - Google Patents

Description

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The invention relates to the oil production industry, namely to devices for controlling and controlling the operation of gas-lift wells,

FIG. 1 shows the proposed device in the well a general view, in FIG. 2 (a, b) - node I in FIG. 1 (operating valve) J in FIG. 3 (c, d) node II in FIG. 1 (ejection sensor).

The device consists of a check valve 1, a packer 2, an accumulation chamber 3, a second row A of the accumulation chamber, a working gas-lift valve 5, lift pipes 6, gas-start starting valves 7, a diaphragm actuator (MIM) 8, a gear 9 for reducing discharge gas pressure, discharge sensor with valve 10 and nozzle 11.

The working gas-lift valve consists of the valve body 12 of the valve body 13 of the valve 13, which is activated by the pressure of fluid in the lift pipes 14, the second node (bellows) of the valve 15, which is activated by the pressure of the pressure gas, the radial hole

16 for gas intake under valve bellows, ball 17, radial orifice 18 for fluid to enter under valve bellows of a valve assembly, triggered by fluid pressure, ball

17 nodes of a valve actuated by fluid pressure.

The ejection sensor consists of a gas injection line 19, a ball 20, a rod 21, a bellows 22, a spring 23, a base 24 for the flap of the adjusting nut 25, a housing 26 for the ejection sensor 27, a flap 28, a nozzle 29, for a gas tube 30.

The device works as follows.

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After the equipment has been lowered into the well, if there is a sufficient level of fluid in it, the valve 3 of the unit actuated by the pipe pressure is opened. As the pressure of the injected gas in the annulus increases, the valve 15 of the gas pressure unit also opens, bypassing the gas from the annulus to the installation accumulation chamber. Under the pressure of the injected gas, the liquid from the accumulation chamber 3 is displaced into the riser 6 to the mouth. When a wellbore appears at the wellhead, the pressure in the discharge line rises, which affects the discharge sensor. In this case, the bellows 22 is opened and the shutter 28 closes the gas outlet

from the nozzle 29, as a result of which the pressure on the diaphragm of MIM 8, the stem of which moves downwards, closes the shut-off unit. Thus, the intake of the working agent into the well is cut off.

At this time, the pressure in the annulus decreases slightly, as a result of which the valve assembly 15, which is triggered by the pressure of the injected gas, blocks the gas access to the accumulation chamber, the discharge of pressure in which through the lifting pipes causes the second valve assembly 13 to close ( see figure 2). At this time

force, the spring 23 opens the safety valve of the bellows 22, and the latter returns to its original position. When this valve 28 moves away from the nozzle 29, the discharge pressure

in the cavity of MIMA. Thus, the access of the working agent to the well (5) is reopened and the cycle is repeated.

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Liquid

Editor S. Lisin

Compiled by I. Karbachinsk

Tehred I. Gaidoga Proofreader E. Sirohman

Order 2530 Circulation 548 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod5 st. Project, 4

Claims (1)

DEVICE FOR CONTROLLING THE OPERATION WORK OF THE PERIODIC GAS LIFT INSTALLATION, containing an elevator pipe, starting and working gas lift valves located on it, a membrane-actuating mechanism connected to the gearbox, characterized in that, in order to improve the reliability of controlling the operation of the installation, it is equipped with an emission sensor with a shutter and nozzle, internal and external accumulation chambers, and the operating valve is made in the form of two bellows c placed in the housing against one another. balls mounted on them, while the accumulation chambers are rigidly connected to the elevator pipe, which is connected to the emission sensor. 12.