Plug-free cement filling method for well fixing

A technology for cementing and cementing, which is used in earth-moving drilling, wellbore/well components, sealing/packaging, etc., can solve problems affecting the progress of the project, etc. Actionable effect

Inactive Publication Date: 2008-08-20
北京华油鼎力兴科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This not only affects the progress of the project, but also has certain construction risks.

Method used

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  • Plug-free cement filling method for well fixing
  • Plug-free cement filling method for well fixing
  • Plug-free cement filling method for well fixing

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Experimental program
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Embodiment Construction

[0016] Such as figure 1 As shown, the present invention includes the following steps: A, lower completion string: install casing 1 in the wellbore 7 to be cemented, and install cement injector 6 and outer casing packer 8 at the lower part of the casing; Casing packers seal the annular space between the lower portion of the casing and the wellbore; e.g. figure 2 As shown, the cement injector includes a cement injector body 6-1, and the cement injector circulation hole 6-2 is evenly arranged on the body, the upper end of the cement injector body is connected with the cement injector upper joint 6-3, and the lower end is connected with There is a lower joint 6-4 of the cementing device, and the cementing device is installed in the casing through the upper and lower joints. The opening sleeve 6-5 and the closing sleeve 6-6 that can move downstream are arranged in the cementing device body. A ring of grooves 6-7-1 and 6-7-2 are uniformly arranged on the inner walls of the opening...

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Abstract

This invention discloses one method to strengthen well without concrete injection, which comprises the following steps: a, setting well column; b, putting injection concrete tube into well column; c, processing the well strengthening without concrete injection under well; d, sealing recycled hole. The invention can accurately compute concrete volume without concrete piston for clearing and recycling operation.

Description

technical field [0001] The invention relates to the technical field of oil recovery, in particular to a plug-free cementing well cementing method. Background technique [0002] In the drilling engineering of the petroleum industry, the completion and cementing technology is to cement the drilled open hole to form a well that can be used for development equipment. Good cement slurry is injected into the annular space between the wellbore and the casing, and waits to set to form a solid cement sheath. Its main function is to isolate oil, gas, and water layers, prevent inter-formation fluid from crossing each other, and protect production layers; isolate serious leakage layers or other complex formations such as collapse; support casing and prevent underground fluid from corroding casing . The quality of cementing directly affects subsequent oil recovery engineering and oil recovery. For a well that contains multiple oil layers, how to effectively protect the oil and gas lay...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): E21B33/13
Inventor李雷祥李新国
Owner北京华油鼎力兴科技发展有限公司