Water pumping and draining and gas producing system of horizontal gas well machine

A technology for pumping drainage and gas wells, which is applied in the fields of fluid extraction, earthwork drilling, wellbore/well components, etc. It can solve problems that have not been seen in other reports, and achieve the effects of optimizing gas well productivity, increasing service life, and simple maintenance

Inactive Publication Date: 2016-11-23
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] After literature research, no other reports have been found on the downhole devices and related principles and technologies of the drainage and gas recovery system of horizontal gas wells.

Method used

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  • Water pumping and draining and gas producing system of horizontal gas well machine
  • Water pumping and draining and gas producing system of horizontal gas well machine
  • Water pumping and draining and gas producing system of horizontal gas well machine

Examples

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Effect test

example 1

[0033] This set of drainage gas recovery system is installed for horizontal gas wells with high sulfur content and high production water. The depth of the horizontal production well section is 3050m, and the output gas-liquid ratio varies between 1500-1750. .

[0034] like figure 1 In the horizontal production well section, the gas-water separator 1 and the linear motor pump 3 are sequentially fixed and installed with the fixer 2, connected with the intelligent coiled tubing 4, and the gas tree 5, the related surface processing device 6, and the intelligent control terminal 7 are installed on the ground.

[0035] After the entire drainage and gas recovery system is put into operation, the high-sulfur formation water and natural gas produced in the production layer enter the gas-water separator 1, and the natural gas is connected to the annulus of the casing for output, and enters the surface treatment device 6 through the gas tree 5 for processing. For desulfurization purific...

example 2

[0039] For highly deviated wells and concave wells in cluster wells, such as Figure 4 (1) and Figure 4 (2) The gas-water separator 1 and the linear motor pump 3 are sequentially fixed and installed in the downhole production section with the fixture 2 at the maximum vertical depth of the well section, connected to the intelligent coiled tubing 4, and the ground equipment installation is consistent with Example 1.

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Abstract

The invention relates to a water pumping and draining and gas producing system of a horizontal gas well machine, which is used for underground water drainage and gas production. By adopting the system, normal production of a gas well can be kept, the productivity of the gas well is increased, and the lifting capacity of a pump to formation water is increased. The system adopts the technical scheme that in an underground gas-liquid separation lifting part, a gas-water separator is connected and fixed with a linear motor pump by a fixator at a production interval of the well; in a ground treatment operation part, the linear motor pump is connected with a gas producing tree by an intelligent coiled tubing, and then the gas producing tree is connected with a ground treatment device by a pipeline; in an intelligent control device, a cable is arranged in the intelligent coiled tubing, one end of the cable is connected with the linear motor pump and the inlet cross section of the gas-water separator, the other end of the cable is connected with a ground intelligent control terminal, and a set of intelligent control program and microcomputer equipment are installed in the intelligent control terminal. The water draining and gas producing system has the functions of preventing sand jamming, increasing the lifting capacity to the formation water and optimizing the productivity of the gas well and is used for water drainage and gas production operation, and maintenance is convenient.

Description

technical field [0001] The invention relates to a horizontal gas well pumping and drainage gas recovery system used in the field of downhole drainage and gas recovery. Background technique [0002] In most of the horizontal gas wells currently developed, there are different degrees of water production, sand production in the production zone, and equipment corrosion by high-sulfur substances. In severe cases, it will cause adverse consequences such as gas well productivity decline and huge economic losses. [0003] Aiming at the problem of water production from production layers, well sites often use mechanical pumping methods such as installing pumps downhole to solve the problem of discharging the produced formation water. However, the current conventional drainage and gas recovery system does not take into account the changing water production of the production layer. The working parameters of pumps and other equipment are fixed. When the water output is small, it is easy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/16E21B43/12E21B43/00
CPCE21B43/16E21B43/00E21B43/12
Inventor 谭晓华王杰刘建仪赖梅李雪向晶黄永智
Owner SOUTHWEST PETROLEUM UNIV
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