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Hardness-controllable low-temperature soluble bridge plug sealing element and preparation method thereof

A seal, low temperature technology, used in sealing/isolation, earthmoving, wellbore/well components, etc., can solve the problem of not being able to effectively adjust the hardness of the seal, and achieve ideal solubility, effective preparation, and surface quality. high effect

Pending Publication Date: 2021-11-19
深圳市智远隆材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is currently no method to effectively adjust the hardness of the seal

Method used

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  • Hardness-controllable low-temperature soluble bridge plug sealing element and preparation method thereof

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Effect test

preparation example Construction

[0036] Specifically, the present invention provides a method for preparing a low-temperature soluble bridge plug seal with controllable hardness, comprising the following steps: (1) mixing polyvinyl alcohol resin, plasticizer, acid-binding agent and filler to obtain a raw material mixture ; (2) molding the raw material mixture to obtain a seal body; (3) aging the seal body until the seal body reaches a predetermined hardness to obtain a seal. The present invention uses polyvinyl alcohol resin, plasticizer, acid-binding agent and filler as raw materials, and performs curing treatment on the molded seal body to obtain a seal with flexibly adjustable hardness, so that the seal can reach a suitable hardness and realize Ideal assembly and sealing pressure bearing performance, and the obtained seal has high surface quality and basically no defects. The method can quickly and effectively prepare the sealing member, and has no strict requirements on equipment, operating environment an...

Embodiment 1

[0072] 100 parts by weight of PVA resin, 62 parts by weight of glycerin, 10 parts by weight of glycerin diacetate, 2 parts by weight of bisphenol A, 2 parts by weight of magnesium hydroxide, and 5 parts by weight of carbon black. After mixing the above raw materials, use molding or extrusion The soluble apron green body A1 is made by injection molding, and the Shore hardness is 94A. The apron body was left open and aged at 28 degrees Celsius and 71% humidity for 24 hours to obtain the apron. The Shore hardness of the apron was 75A and the moisture content was 23.74%. The surface quality of the rubber ring body is good, and the surface quality of the rubber ring is good.

Embodiment 2

[0074] The same as in Example 1, the difference is that the apron body A1 is left open and aged at 23.6 degrees Celsius and 58% humidity for 10 hours to obtain an apron with a Shore hardness of 85A and a moisture content of 5.35%. The surface quality of the apron is good.

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Abstract

The invention discloses a hardness-controllable low-temperature soluble bridge plug sealing element and a preparation method thereof, and relates to the technical field of oil and gas well sealing layer equipment. According to the preparation method, the polyvinyl alcohol resin, the plasticizer, the acid-binding agent and the filler are used as raw materials, the formed sealing element blank is cured, the sealing element with the hardness capable of being flexibly adjusted can be obtained, the sealing element reaches the proper hardness, ideal assembling performance and sealing pressure-bearing performance are achieved, the surface quality of the obtained sealing element is high, and basically no defect exists. The method can be used for quickly and effectively preparing the sealing element, and has no harsh requirements on equipment, operation environment and the like. The low-temperature soluble bridge plug sealing element provided by the invention is prepared by the method. The sealing element is high in surface quality, basically free of surface defects, appropriate in hardness, good in assembling performance, ideal in sealing pressure-bearing performance and ideal in dissolving performance.

Description

technical field [0001] The invention relates to the technical field of oil and gas well sealing equipment, in particular to a low-temperature soluble bridge plug seal with controllable hardness and a preparation method thereof. Background technique [0002] Bridge plug is a kind of equipment used for sealing layers in oil and gas wells. It has the characteristics of less construction procedures, periodic intervals, and accurate sealing positions. Therefore, it has been widely used in the fields of oil production and maintenance of oil and gas wells. In actual production operations, bridge plugs are used to block oil and gas wells. After a period of time, the seals of the bridge plugs dissolve to realize full-bore unsealing, which greatly reduces man-hours and operating costs. According to practical application experience, the ideal seal requires certain pressure-bearing tightness, rapid solubility and appropriate hardness. Among them, the hardness in an appropriate range is ...

Claims

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Application Information

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IPC IPC(8): C08L29/04C08K5/053C08K5/103C08K5/13C08K3/22C08K13/02E21B33/134
CPCC08K5/053C08K5/103C08K5/13C08K3/22C08K13/02E21B33/134C08K2003/2224C08L29/04
Inventor 卢敏娟
Owner 深圳市智远隆材料科技有限公司
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