SU1458562A1 - Arrangement for lifting liquid from well - Google Patents

Abstract

The invention relates to the oil and gas industry and M. b. used in the extraction of fluid from watered gas wells during their development. The goal is to increase work efficiency by allowing the automatic adjustment of the pressure of the sealing element depending on the column of fluid being lifted. For this, in the hollow plunger 2 a piston 5 is installed with a spring-loaded stem 6. Plunger 2 is made at the bottom

Description

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The invention relates to the oil and gas industry and can be used to extract fluids from watered gas wells during their development.

The purpose of the invention is to increase work efficiency by allowing the automatic adjustment of the pressure of the sealing element, depending on the column of fluid being lifted.

The drawing shows schematically a device for lifting fluid from wells, a general view.

A device for lifting fluid from wells includes a column of lifting pipes 1, a hollow plunger body 2, an elastic seal 3 with a cavity a. In the hollow plunger 2 there is a cylinder 4 in which the piston 5 with the bis rod is mounted with a movable stop 7 for the spring 8. The housing 2 is provided with a conical cap 9 with a ynojjoM 10 for the spring 8. The end of the rod 6 is connected through the stand of the stopper unit 11 to the drain cable 12. Sub piston space b is communicated through a channel in with cavity a, supra piston space d through channel d is communicated with superplunger space e.

In order to prevent damage to the elastic element 3 when the plunger is stuck in the lifting pipes 1 and the drain cable 12 is broken when lifting the device, a safety element 14 is provided in the cover 13 of the cylinder 4. 17 of the plunger 2, and with elements (not shown) that allow the brake roller 16 to rotate freely when the device is lowered. The pressure roller 16 is pressed against the inner surface of the column of the lifting pipes 1 by a spring 18, the tension force of which is adjusted to the ving volume 19.

The device works as follows.

During the descent of the device, the piston 5 under the influence of the spring 8 moves in the cylinder 4 to the lower extreme position, with

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This sealing fluid (the device is filled with sealing fluid prior to operation) from the cavity a flows into the cavity b through the channel b under the influence of the elastic forces of the elastic seal 3, which assumes a cylindrical shape. During the descent of the device, liquid flows through the gap between the wall of the lifting tubes 1 and the elastic seal 3 above the device (i.e., the device is immersed), while the pressure roller 16 rotates freely.

After the required immersion depth is reached, the device is raised, the pressure roller 16 in this case creates a braking effect, and the force on the release cable 12 increases. The braking force through the rod 6 and the piston 5 is transferred to the fluid, which through the channel enters the cavity a, and the elastic seal 3 takes a barrel shape. The gap between the wall of the lifting pipes 1 and the elastic seal 3 decreases, the force on the discharge cable 12 increases, which leads to an increase in the pressing force and, consequently, to the expansion of the elastic seal 3 to completely cover the gap. When the fluid rises to the wellhead, the fluid enters the flow line, the force on the drain cable 12 decreases, and when the fluid is completely removed, the elastic seal 3 takes on a cylindrical shape and the cycle repeats.

The application of the invention provides for lifting a large volume of fluid in one cycle, reduces the load on the cable and reduces the degree of wear of the seal.

Claims (1)

Invention Formula A device for lifting fluid from wells, comprising a hollow plunger with an elastic sealing element with a cavity, a stop assembly and a connection assembly of a plunger with a drain cable, characterized in that, in order to increase the efficiency 34 operation due to the possibility of through-slotting bridges for automatic adjustment of the rollers and with a channel for communication of the sealing element podporshzhat in the dependency -new cavity of the plunger with the space bridges from the column of the fluid being lifted, ononad him, with the nadporshnev cavity fitted with a plunger 5 mounted in the plunger hydraulically connected to the cavity a piston with a spring-loaded source and pri-sealing element, and the assembly with connecting rollers placed in the plunger under the drain cable is placed at the end gere, and the latter is made in the lower part of the stock.