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Fully dissolvable slips

A technology of slips and water-soluble magnesium, which is applied in coating, metal material coating technology, earthwork drilling and mining, etc., can solve problems such as increasing difficulty, damaging casing wall, casing deformation and damage, etc., and achieves simple structure and high efficiency. Promotion value, easy-to-operate effect

Pending Publication Date: 2021-02-19
中石化石油工程技术服务有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of traditional slips will not only damage the casing wall, cause casing deformation and damage, but may also leave fragments of slip teeth in the well, causing accidents, increasing the difficulty of subsequent well construction, and becoming a safety hazard. It is necessary to drill and grind the lower string to clean the casing

Method used

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Embodiment Construction

[0028] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0029] refer to figure 1 and Figure 10 , the present invention provides a fully soluble slip, comprising: a water-soluble magnesium-aluminum alloy body 101 and a nickel-based alloy thin layer 102 .

[0030] Among them, the material of the water-soluble magnesium-aluminum alloy body 101 is water-soluble magnesium-aluminum alloy, which is composed of the following components by weight percentage: a preferred material composition is 25-80% magnesium, 19-74% aluminum, and other contents≤1 %; another preferred material formula is, magnesium 42-68%, aluminum 31-57%, other content ≤ 1%. According to the requirements of application environment and complete dissolution time, technicians adjust the formula of water-soluble mag...

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Abstract

The invention discloses fully dissolvable slips and belongs to the technical field of downhole tools, and is suitable for tool design needing deblocking anchoring structure such as a packer and a bridge plug. A preparation method of the fully dissolvable slips comprises coating a 0.5-1 mm thick nickel-based alloy thin layer which is high in wear resistance and coefficient of friction on a specially designed and processed water soluble magnesium aluminum alloy by means of a special process method. An application method of the fully dissolvable slips comprises the steps of matched with a slips cone and a slips back ring, in a tool sealing process, stretching the fully dissolvable slips uniformly and attaching the same to a bushing; and enabling the tool to be anchored to the bushing withoutmovement, and unblocking the tool automatically after the fully dissolvable slips is dissolved. Compared with conventional slips, the fully dissolvable slips does not damage the busing and is free ofimpurities in the bushing after being dissolved, so that follow-up construction is not affected and a construction flow is simplified.

Description

technical field [0001] The invention relates to the technical field of downhole tools, in particular to a fully soluble slip. Background technique [0002] A wide variety of downhole tools are required in the oil and gas development process, some of which require unsealable anchoring structures. Typical cases include: packer tools required in special operations such as testing, workover, and separate layer injection and production; In the fracturing operation of oil and gas wells, the bridge plug tool is used to temporarily seal the wellbore. The slips in the traditional anchoring structure are prepared by hardened surface teeth or inlaid carbide teeth, inlaid ceramic teeth and other processes. The slip teeth can be embedded in the casing wall so that the tool cannot be moved. When it needs to be unsealed, it can be recovered with a specially designed structure. Slip teeth. This kind of traditional slips will not only damage the casing wall, cause casing deformation and da...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B19/10C22C23/02C22C21/06C23C4/06C23C4/129
CPCC22C21/06C22C23/02C23C4/06C23C4/129E21B19/10
Inventor 袁发勇陈龙徐帮才江强杨洁赵鹏
Owner 中石化石油工程技术服务有限公司
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