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Blowout-prevention pipe column and technique in water injection well operation pipe

A technology for working pipes and internal blowout prevention, which is applied to wellbore/well components, production fluids, earthwork drilling and production, etc. It can solve problems such as inability to control the liquid in the oil pipe, failure to re-seal the oil pipe, and difficulty in construction

Inactive Publication Date: 2018-07-10
PETROCHINA CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The bridge-type eccentric layered water injection technology has become the main water injection method for water injection wells in Daqing Oilfield. However, this technology can only achieve blowout prevention in the pipe when the string is lowered. Cause construction difficulties and pollute the environment

Method used

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  • Blowout-prevention pipe column and technique in water injection well operation pipe

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specific Embodiment approach

[0012] Specific embodiments: The present invention will be further described in detail below in conjunction with the accompanying drawings. The blowout preventer string in the water injection well operation pipe of the present invention is composed of oil pipe 1, washable well packer 2, anti-backflow bridge type eccentric water distributor 3, two-way anti- Spray ball seat 4, screen pipe 5, wire plug 6 and impact rod 7; among them, the washable packer 2, anti-reflux bridge type eccentric water distributor 3, two-way anti-blowout ball seat 4 pass through the thread and oil pipe 1 in turn Connection, two-way blowout preventer ball seat 4, screen pipe 5, and plug 6 are connected by screws, and the impact rod 7 is inside the two-way blowout preventer ball seat 4; the blowout prevention process in the water injection well operation pipe using the blowout preventer string in the water injection well operation pipe It is achieved through the following steps:

[0013] a. Firstly, conne...

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Abstract

The invention relates to the technical field of oil field oil production engineering and belongs to a blowout-prevention pipe column and technique in a water injection well operation pipe. According to the blowout-prevention pipe column and technique in the water injection well operation pipe, the problem that in-pipe blowout prevention cannot be achieved during pipe column lifting operation of anexisting bridge-type eccentric layered water injection pipe column is solved, and the requirement for environment-friendly construction during water injection well operation is met. After a pipe column tool is downwards put to a water pre-injecting layer section, pressurizing is conducted form the oil pipe (1), a two-way blowout-prevention ball seat (4) is started, and well-washable packers (2) are released, so that functions of layered and segmented water injection and inverse well washing of the water injection pipe column can be achieved; and during pipe column lifting operation, an impactbar (7) is put in from the oil pipe (1), the two-way blowout-prevention ball seat (4) is sealed, and meanwhile reverse-flow-preventing bridge-type eccentric water distributors (3) have the self-sealing function so that in-pipe blowout prevention during pipe column lifting operation can be achieved. The blowout-prevention pipe column and technique in the water injection well operation pipe have the advantages that safety and environmental friendliness are achieved, operation is easy, no additional procedure is added, and the operation and construction efficiency is not affected.

Description

technical field [0001] The invention relates to the technical field of oil production engineering in an oil field, and belongs to a blowout prevention pipe string in a water injection well operation pipe and a blowout prevention technology. Background technique [0002] The bridge-type eccentric layered water injection technology has become the main water injection method for water injection wells in Daqing Oilfield. However, this technology can only achieve blowout prevention in the pipe when the string is lowered. Cause construction difficulties and pollute the environment. The blowout prevention pipe string and blowout prevention technology in the water injection well operation solve the problem caused by the liquid ejection in the pipe during the pipe string operation, realize the blowout prevention in the whole process of the pipe string operation and the pipe string operation, and meet the normal water injection of the process pipe string And backwash function. Cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/12E21B33/122E21B43/20
Inventor 王凤山刘崇江张广超宋兴良岳庆峰孙江王鹏程朱振坤刘仁勇王琦
Owner PETROCHINA CO LTD
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