SU1550101A1 - Arrangement for removing liquid from gas well - Google Patents

Abstract

The invention relates to mining and can be used in the gas industry. The goal is to increase the productivity of work by providing the possibility of operating the well through the tube and annulus spaces. The device contains concentrically arranged perforated along the length of the casing string 1 and lifting 2 pipes. Between pipes 1 and 2 consistently installed dispersants in the form of closed volumes. The lateral surface of the volumes has the shape of a cone-shaped cuff 3. Each of the cuffs 3 has a perforation zone 4. Installing the cuffs not only in the interval of the productive formation and up the wellbore eliminates the contact of the pipes 2 with the pipes 1 and increase the effect of gas twisting along the wellbore. The distance between the cuffs 3 in the interval of the reservoir is selected based on the limits of the permeable intervals. 4 hp f-ly. 1 il.

Description

The invention relates to mining, in particular, to devices for removing liquid and can be used in the gas industry in the operation of watering production wells.

The purpose of the invention is to increase the productivity of work by providing the possibility of operating wells in the tube and annulus spaces.

The drawing shows schematically a device for removing fluid from a gas well.

The device contains concentrically arranged perforated along the length of the casing string 1 and lifting 2 pipes, installed successively along the length of the lifting column 2 pipes, and between the casing columns 1 and lifting 2 pipes dispersers in the form of closed volumes, the lateral surface of which has the shape of a cone-shaped cuff 3, each of which has a perforation zone 4.

The perforated zone 4 can be placed on one of the sides of each cone-shaped cuff 3.

The perforation zone 4 of each of the subsequent cone-shaped cuffs 3 is disposed relative to each other.

In addition, the offset of the perforation zone 4 of each of the subsequent cone-shaped cuffs 3 is made along a spiral forming lifting column 2 to the axis of the column.

The perforation zone 4 of each of the cone-shaped cuffs 3 is located in the middle of it.

The cuffs 3 are located in the interval of the reservoir 5.

The device works as follows.

The gas together with the fluid from the reservoir 5 through the perforated holes of 6 columns of casing 1 enters the cavity of sections 7 formed by cuffs 3, the perforated zone of which is changed on one of the halves of cuff 3, the lower part of the lifting column 2 pipes and casing string 1. Part gas and liquid through the holes 6 of the reservoir 5, passes through the annular space, is fixed and spiral enters the surface.

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Another part of the liquid and gas flows through the openings into the column of the 2 lifting pipes and is carried to the surface by the gas flow through the lifting column 2.

At the same time, due to the ejection effect, the condensed part of the liquid is dispersed to obtain aerosols. By arranging the openings of the perforation zone 4 along a spiral formation, a rotating gas flow is created, which promotes the dispersion of the liquid and its removal to the surface.

The presence of holes in the cuffs allows the surfactant surfactant to be pumped through the annulus as well. The injected surfactant, the passage through the perforation zone 4, partially remains in the non-perforated part of the cuff 3, where the incoming fluid is affected by the gas flow, dispersed, and the liquid is carried to the surface in the form of foam.

In addition, the presence of the perforation zone 4 in the cuffs 3 allows the well to be influenced both through the tube space and the annulus space. The passage of gas with liquid through the perforation zone 4 in the cuff 3 creates their vibration, which also improves the dispersion of the liquid, cleaning from various sludge deposited on the bottom.

The installation of the cuffs 3 not only in the interval of the productive formation 5, but also up the wellbore eliminates the contact of the lifting pipe 2 with the casing string and increase the effect of gas twisting along the wellbore.

The distances between the cuffs 3 in the interval of the productive formation 5 are selected from the calculation of the boundaries of the permeable intervals, i.e. installed at the boundaries of permeable intervals, and above the reservoir is selected based on the curvature of the borehole and the bend of the tubing and varies from 50-150 m, and is refined experimentally.

Claims (5)

1. A device for removing liquid from a gas well, containing concentrically arranged perforated along the length of the casing and lifting pipe columns and dispersers arranged in series between the casing and lifting pipe columns in the form of closed volumes, the lateral surface of which has the shape of a cone-shaped cuff, characterized by the fact that The goal of increasing productivity is by ensuring that the well can be operated through pipe and eatpipe spaces, each cone-shaped cuff has rforatsionnuyu Zone. 2. A device according to claim 1, characterized in that the perforation 50101b This zone is located on one of the halves of each cone-shaped cuff. 3. The device according to paragraphs. 1 and 2, characterized in that the perforation zone of each of the subsequent cone-shaped cuffs is offset relative to one another. 4. Device on PP. t-3, characterized in that the offset of the perforation zone of each of the subsequent cone-shaped cuffs is made along a spiral generatrix to the axis of the column lifting pipes. 5. The device according to claim 1, characterized in that the perforation zone of each of the cone-shaped cuffs is located in its middle part. ten T5