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Plugging agent composition, plugging agent and preparation method and application of the plugging agent

A technology of composition and plugging agent, applied in the direction of drilling composition, chemical instruments and methods, etc., can solve the problems of low pressure bearing capacity, insufficient adhesion of plugging agent, poor plugging effect, etc., and achieve strong The effect of pressure bearing ability, good underwater adhesion ability and enhanced plugging ability

Inactive Publication Date: 2020-01-31
ZHANJIANG BRANCH OF CHINA NATIONAL OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a plugging agent composition, which is prepared from the plugging agent composition, in order to overcome the problems of insufficient adhesion, low pressure bearing capacity and poor plugging effect in the prior art. The lost circulation agent of the present invention and its application in the anti-leakage and plugging aspects of drilling, the lost circulation agent prepared by the lost circulation agent composition of the present invention is a kind of bionic mussel strong adhesion supramolecular gel stoppage agent, which has extremely Good underwater adhesion ability, and strong anti-pollution ability, anti-pressure ability and high temperature resistance ability

Method used

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  • Plugging agent composition, plugging agent and preparation method and application of the plugging agent

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preparation example Construction

[0043] According to the second aspect of the present invention, there is provided a method for preparing a lost circulation agent, the method comprising: mixing the components of the lost circulation agent composition of the present invention and performing a polymerization crosslinking reaction.

[0044] According to the method of the present invention, the method of mixing the components of the lost circulation agent composition of the present invention is not particularly limited, for example, the components can be mixed together to perform a polymerization crosslinking reaction; water can also be mixed with any After one or two ingredients are mixed, the other ingredients are mixed together or separately. Preferably, after the first mixing of the biomimetic mussel adhesive, the nanoclay and water, the second mixing with the vinyl monomer and the crosslinking agent is performed.

[0045] The first mixing method is preferably as follows: firstly mix the water with the biomim...

Embodiment 1

[0059] Add 0.5 parts of dopamine to 100 parts of distilled water at 25°C, stir for 10 minutes with a magnetic stirrer, add 2 parts of nanoclay laponite RD, use a magnetic stirrer, stir at 25°C for 16 hours, then add 5 parts of vinyl to the above mixture A monomer (specifically acrylamide), 0.1 part of a crosslinking agent (specifically N,N-dimethylbisacrylamide), and stirred at 25°C for 10 min until the monomer and crosslinking agent are fully dissolved. Then pour the mixture into a three-necked flask, pass nitrogen gas for 30 minutes, heat to 60°C using a water bath, and heat while stirring with an electric mixer. After the temperature of the mixture reaches 60°C, add 0.1 part of initiator (specifically azobisisobutyl Amidine hydrochloride), a white gel product was obtained after 8 hours of reaction. After cooling, take out the gel, wash it, and dry it in an oven at 70°C for 16 hours to obtain a white solid product. The solid product is crushed into granules, which is the bio...

Embodiment 2

[0061] Add 1 part of dopamine to 100 parts of distilled water at 25°C, stir for 12 minutes with a magnetic stirrer, add 2.5 parts of nanoclay laponite RD, use a magnetic stirrer, stir at 25°C for 18 hours, and then add 7.5 parts of vinyl to the above mixture A monomer (specifically acrylamide), 2.5 parts of a crosslinking agent (specifically N,N-dimethylbisacrylamide), and stirred at 25°C for 15 minutes until the monomer and the crosslinking agent are fully dissolved. Then pour the mixture into a three-necked flask, pass nitrogen gas for 30 minutes, heat to 60°C using a water bath, and heat while stirring with an electric mixer. After the temperature of the mixture reaches 60°C, add 1 part of initiator (specifically azobisisobutyl Amidine hydrochloride), a white gel product was obtained after 8 hours of reaction. After cooling, take out the gel, wash it, and dry it in an oven at 70°C for 16 hours to obtain a white solid product. The solid product is crushed into granules, whic...

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Abstract

The invention relates to the field of drilling fluid leakage prevention and plugging, and discloses a plugging agent composition, a plugging agent and a preparation method and an application of the plugging agent. The plugging agent composition provided by the invention contains a bionic mussel adhesive, nano clay, a vinyl monomer, a cross-linking agent and water. The plugging agent prepared fromthe plugging agent composition disclosed by the invention is a bionic mussel strong-adhesion polymer gel plugging agent, has excellent underwater adhesion capability, and is relatively strong in pollution resistance, pressure bearing resistance and high-temperature resistance.

Description

technical field [0001] The invention relates to the field of drilling fluid leakage prevention and plugging, in particular to a plugging agent composition, a plugging agent and a preparation method and application thereof. Background technique [0002] Lost circulation has always been a difficult problem for field engineers all over the world. The occurrence of lost circulation should generally meet the conditions that the working fluid pressure in the wellbore is greater than the pore pressure of the liquid in the formation pores, fractures or caves, and there is a loss channel and a large space for containing the liquid in the formation. Conventional plugging materials are generally divided into four categories: granular, flake, fiber and a mixture of two or more of the above materials. Commonly used plugging methods are divided into eight categories: (1) adjusting drilling fluid properties; (2) static plugging method; (3) bridging material plugging method; (4) high fluid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/467
CPCC09K8/467
Inventor 李中郭永宾黄熠蒋官澄胡永堂陈浩东杜威颜帮川管申吴旭东李磊胡文军向雄邓正强吴怡
Owner ZHANJIANG BRANCH OF CHINA NATIONAL OFFSHORE OIL CORP
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