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Single-tube jet pump liquor drainage technology method for normal-pressure shale gas well

A technology of shale gas wells and process methods, which is applied in the direction of production fluid, earthwork drilling, wellbore/well components, etc., and can solve the problems of easy erosion damage of hydraulic jet pumps, low drainage efficiency of electric submersible pumps, power fluid Problems such as high injection pressure, to achieve the effect of improving the efficiency of liquid drainage and gas production, reducing the problem of liquid level commissioning, and large liquid drainage

Inactive Publication Date: 2018-11-23
中国石油化工股份有限公司华东油气分公司采油气工程服务中心
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  • Claims
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AI Technical Summary

Problems solved by technology

[0002] Atmospheric pressure shale gas wells cannot produce spontaneously after they are completed and put into production. In the prior art, liquid drainage by electric submersible pumps or double-pipe jet pumps is used to produce gas, but the drainage of electric submersible pumps has the disadvantages of low drainage efficiency and difficult maintenance ;Double-pipe jet pump drainage has the disadvantages of high power fluid injection pressure, high requirements for ground equipment, and the hydraulic jet pump is easy to be damaged by erosion

Method used

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  • Single-tube jet pump liquor drainage technology method for normal-pressure shale gas well

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Embodiment Construction

[0020] The following non-limiting examples are used to further illustrate the present invention and understand the present invention.

[0021] The present invention is an atmospheric shale gas well single-tube jet pump drainage process method, which includes the following steps:

[0022] 1) Determine the working parameters, running depth, nozzle size, string components, etc. of the jet pump according to the well condition, preliminary operation and discharge conditions, and production requirements; figure 1 As shown, the pipe string assembly includes a packer assembly 6, a jet pump working barrel 3, and an oil pipe 2;

[0023] 2) Connect the ground assembly tools, run in the casing 1, the packer assembly 6, the jet pump barrel 5, and the tubing 2 in sequence; the packer assembly 6 is located below the jet pump barrel 5;

[0024] Among them, the jet pump barrel 5 includes a lifting system, a jet pump barrel sealing joint, a jet pump barrel tailstock, and a check valve assembly that are...

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Abstract

The invention discloses a single-tube jet pump liquor drainage technology method for a normal-pressure shale gas well. In the method, firstly, a packer assembly and a jet pump cylinder are lowered into the well through an oil tube; then a jet pump core is put into the oil tube and pushed into the jet pump cylinder through well flushing, direct-cycle well flushing production is performed, and a single-tube jet pump liquor drainage device is formed. With the oil tube being a power liquor injecting tube, an annulus is formed between the oil tube and a production casing to be used as a mixed liquor discharging tube; in this way, rapid liquor drainage is realized for the normal-pressure shale gas well.

Description

Technical field [0001] The invention relates to a process method for discharging liquid from a single-tube jet pump in an atmospheric shale gas well. Background technique [0002] After normal pressure shale gas wells are completed and put into production, they cannot spontaneously produce gas. In the prior art, electric submersible pump discharge or double-pipe jet pump discharge is used to produce gas. However, electric submersible pump discharge has the disadvantages of low discharge efficiency and difficult maintenance. ; Double-tube jet pump discharge has the disadvantages of high power fluid injection pressure, high requirements for ground equipment, and easy erosion and damage of the hydraulic jet pump. Summary of the invention [0003] The purpose of the present invention is to provide an atmospheric shale gas well single-tube jet pump discharge process method that can meet the requirements of rapid discharge of atmospheric shale gas wells. [0004] The technical scheme of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/00
CPCE21B43/00
Inventor 卓吉高宋其仓孙忠明夏苏疆陈建军夏志鹏喻刘稀徐伟徐永黄红成龚明峰樊开赟高启国
Owner 中国石油化工股份有限公司华东油气分公司采油气工程服务中心
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