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Water injection pipe string and method for feeding and pulling water injection pipe string

A water injection pipe and water outlet pipe technology, which is applied in the direction of earthwork drilling, mining fluid, wellbore/well parts, etc., can solve the problems of steel oil pipes such as corrosion, scaling, and pipe jamming, so as to improve construction efficiency and service life Long, prevent random swing and channeling effect

Pending Publication Date: 2018-11-20
河北恒安泰油管有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, steel oil pipes are prone to corrosion, and scaling and pipe jamming will occur

Method used

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  • Water injection pipe string and method for feeding and pulling water injection pipe string
  • Water injection pipe string and method for feeding and pulling water injection pipe string
  • Water injection pipe string and method for feeding and pulling water injection pipe string

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Embodiment Construction

[0037] The invention discloses a water injection pipe string. The water injection pipe string is corrosion-resistant, has a long service life, is convenient for construction, and can ensure smooth water injection.

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0039] The water injection pipe string includes, from top to bottom, a first water injection pipe 2, a hydraulic anchor 5, a packer 6, a second water injection pipe 7, a water injection sliding sleeve 8 and a water outlet pipe head. ...

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Abstract

The invention discloses a water injection pipe string. The water injection pipe string comprises a first water injection pipe, a hydraulic anchor, a packer, a second water injection pipe, a water injection sliding sleeve and a water outlet pipe head, and the first water injection pipe and the second water injection pipe are flexible composite coiled tubing; the lower portion of the first water injection pipe is connected with the hydraulic anchor, the lower portion of the hydraulic anchor is connected with the packer, the lower portion of the packer is connected with the second water injectionpipe, the water injection sliding sleeve is connected to the lower portion of the second water injection pipe, and the lower portion of the water injection sliding sleeve is connected with the wateroutlet pipe head. Accordingly, the first water injection pipe is the flexible composite coiled tubing, and thus the first water injection pipe is resistant to corrosion and long in service life; the length of the first water injection pipe is long enough, then the process of connecting multiple short pipes is avoided, and the construction efficiency is improved. Anchor jaws of the hydraulic anchorcan clamp the inner wall of a sleeve in the water injection process, the anchorage force is provided for the water injection pipe string, the phenomenon that the water injection pipe string swings freely is prevented, and it is guaranteed that water injection is conducted smoothly. The invention further discloses a method for feeding and pulling the water injection pipe string.

Description

technical field [0001] The invention relates to the field of oil and gas field exploitation, and more specifically relates to a water injection pipe string and a method for lowering and pulling out the water injection pipe string. Background technique [0002] In the process of oil and gas extraction, it is necessary to inject water into the formation through the water injection pipe string. Traditional water injection strings consist of multiple sections of steel tubing and downhole tools such as packers. However, steel oil pipes are prone to corrosion, and phenomena such as scaling and pipe jamming may occur. Therefore, flexible composite coiled tubing is used instead of steel tubing. Flexible composite coiled tubing has the characteristics of corrosion resistance, no fouling, and long service life. However, how to design the string structure of flexible composite coiled tubing and packer to simplify the construction difficulty and ensure the smooth progress of water in...

Claims

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Application Information

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IPC IPC(8): E21B43/20
CPCE21B43/20
Inventor 孟庆义李召勇张金刚
Owner 河北恒安泰油管有限公司
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