Chemical plugging rubber plug, preparation method and application thereof

A chemical and rubber plug technology, applied in the field of oil and gas field exploration and development, can solve the problems of low viscosity of blasthole plugging fluid, limited use range, poor expansion performance and elastic toughness, etc., and achieve excellent corrosion resistance, irreversible plugging, flow good effect

Active Publication Date: 2019-06-28
JINGZHOU JIAHUA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The blasthole plugging fluid provided by the invention has a low viscosity, which can be as low as 7mPa·s at 80°C, has good fluidity, and can be cleaned well after entering the wellbore without hanging on the casing wall and polluting the wellbore; High strength, the compressive strength after curing for 48 hours can reach 120MPa, strong pressure bearing capacity; water, oil, acid and alkali resistance, good temperature resistance, in 15% hydrochloric acid solution or 1% sodium hydroxide solution, 120 ℃ environment 48h weight loss is 0%, but this invention is only suitable for plugging oil and water well blastholes, the application range is limited, and the expansion performance and elastic toughness are not good

Method used

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  • Chemical plugging rubber plug, preparation method and application thereof
  • Chemical plugging rubber plug, preparation method and application thereof
  • Chemical plugging rubber plug, preparation method and application thereof

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preparation example Construction

[0032] The present invention provides a method for preparing the chemical plugging rubber plug described in the above technical solution, comprising the following steps: mixing various preparation raw materials for the chemical plugging rubber plug to obtain the chemical plugging rubber plug. In the present invention, the mixing is preferably carried out under stirring conditions, and the stirring speed is preferably 500 r / min.

[0033] In the present invention, when no accelerator is included in the preparation raw materials of the chemical plugging plug, it is preferable to sequentially add a flow regulator, a liquid phase expansion agent, a thickener and a solid phase expansion agent into the resin base liquid Mix to obtain a chemical plugging rubber stopper. In the present invention, the stirring time after mixing the resin base liquid with the flow regulator is preferably 30-60 minutes; the stirring time after mixing with the liquid phase expansion agent is preferably 5 m...

Embodiment 1

[0039] (1) In parts by weight, 40 parts of flow regulators are added to 60 parts of resin base liquid, and stirred for 40 min at a speed of 500 r / min; the resin base liquid consists of 55 parts of epoxy resin and 5 parts of hydantoin Epoxy resin composition; The flow regulator is 1,4-butanediol diglycidyl ether;

[0040] (2) Add 1.8 parts of liquid-phase expansion agent and stir for 5min at a speed of 500r / min; the preparation method of the liquid-phase expansion agent is to add sodium hydroxide to water, add monobutyl ether after fully dissolving, and the water , the mass ratio of monobutyl ether and sodium hydroxide is 100:50:5;

[0041] (3) Add 16 parts of thickening agent and stir for 5 minutes at a speed of 500r / min; the thickening agent is dihydroxyethylethylenediamine;

[0042] (4) Add 0.1 part of accelerator and stir for 5min at a speed of 500r / min; the model of the accelerator is DMP-30;

[0043] (5) Add 0.2 part of solid-phase expansion agent and stir for 5 minutes...

Embodiment 2

[0045] (1) In parts by weight, 40 parts of flow regulators are added to 60 parts of resin base liquid, and stirred for 40 min at a speed of 500 r / min; the resin base liquid consists of 55 parts of epoxy resin and 5 parts of hydantoin Epoxy resin composition; The flow regulator is 1,4-butanediol diglycidyl ether;

[0046] (2) Add 1.8 parts of liquid-phase expansion agent and stir for 5min at a speed of 500r / min; the preparation method of the liquid-phase expansion agent is to add sodium hydroxide to water, add monobutyl ether after fully dissolving, and the water , the mass ratio of monobutyl ether and sodium hydroxide is 100:50:5;

[0047] (3) Add 18 parts of thickening agent and stir for 5 minutes at a speed of 500r / min; the thickening agent is dihydroxyethylethylenediamine;

[0048] (4) Add 0.1 part of accelerator and stir for 5min at a speed of 500r / min; the model of the accelerator is DMP-30;

[0049] (5) Add 0.2 part of solid-phase expansion agent and stir for 5 minutes...

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Abstract

This invention provides a chemical plugging rubber plug, a preparation method and application thereof, and belongs to technical field of oil and gas exploration and development. The chemical pluggingrubber plug comprises the following preparation raw materials by weight: 100 parts of a basic liquid including a resin base liquid and a flow pattern regulator; 1-5 parts of an expansion agent including a liquidoid expansion agent and a solidoid phase expansion agent; 1-25 parts of a gelatinizer. The chemical plugging rubber plug takes the base liquid composed of resin base liquid and flow pattern regulator as the main body, and cooperates with the expansion agent and the thickener, so the obtained chemical sealing rubber plug has the advantages of good rheological properties, excellent expansion property and elastic toughness, high bearing strength, strong corrosion resistance to acid, alkali, salt and hydrogen sulfide, irreversible sealing and long validity period.

Description

technical field [0001] The invention relates to the technical field of oil and gas field exploration and development, in particular to a chemical plugging rubber plug and a preparation method and application thereof. Background technique [0002] At present, coiled tubing is more and more used in oil and gas field drilling and washing operations, which can greatly save construction time and cost. However, it is not ruled out that coiled tubing check valve failure and ground pipeline puncture leakage may occur during construction. At this time, if the wellbore is already under pressure, there will be a well control risk, resulting in the coiled tubing not being able to be pulled out of the wellhead directly. This requires A material can form a good plugging slug in the coiled tubing to meet the pressure bearing requirements, and at the same time have good toughness to meet the deformation requirements during the pulling out of the coiled tubing. In addition, for lost formati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/467E21B33/134
Inventor 许明标杨洋陈侃
Owner JINGZHOU JIAHUA TECH
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