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Preparation method of coating agent

A technology of coating agent and preparation steps, which is applied in the field of preparation of coating agent, can solve the problems of unsatisfactory salt resistance and low coating effect, and improve the coating ability of thickening, temperature resistance, and film formation good sex effect

Inactive Publication Date: 2019-07-19
褚文慧
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  • Claims
  • Application Information

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Problems solved by technology

[0007] The main technical problem to be solved by the present invention is to provide a preparation method for the defects that the salt resistance of the coating agent on the market is not ideal and the coating effect is low.

Method used

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  • Preparation method of coating agent

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preparation example Construction

[0031] Preparation of mineral composites: mix kaolin, slag, and sodium silicate solution with a mass fraction of 40% according to a mass ratio of 2:2:3, put them into a reactor with a stirrer, and stir for 20 minutes to obtain minerals compound, spare;

[0032] Preparation of modified bamboo fiber:

[0033]The chloroacetic acid solution that is 30% by mass fraction, isopropanol is mixed to obtain mixed solution after being 2: 3 by mass ratio, and the sodium hydroxide solution that bamboo fiber, mixed solution, mass fraction are 10% is 3 by mass ratio: Mix 2:1 and put it into a beaker, and pass nitrogen into the beaker until all the air is replaced, under the protection of nitrogen, heat up to 30°C, stir for 30 minutes, and obtain modified bamboo fiber, which is ready for use;

[0034] Preparation of modified silicic acid gel:

[0035] Mix dilute hydrochloric acid and saturated sodium silicate solution with a mass fraction of 5% at a mass ratio of 1:2, put them in a stirrer, ...

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Abstract

The invention discloses a preparation method of a coating agent, and belongs to the technical field of petroleum and natural gas drilling. According to the preparation method, firstly, an inorganic mineral polymer is synthesized from kaolin, slag and sodium silicate as raw materials, the inorganic mineral forms amorphous bodies of silicon dioxide and aluminum oxide under the excitation of water glass and has relatively strong corrosion resistance, and use of the inorganic mineral greatly enhances the acid and alkali resistance and the stability of the coating agent prepared according to the preparation method provided by the invention; then, bamboo fiber is used as a raw material, and etherified sphagna fiber has the effects of film formation, bonding, water retention, colloid protection and the like and has a good film-forming property; then, seaweed is used as a raw material, the seaweed contains trehalose, and the trehalose is combined with a silicic acid gel through fermentation, so that the components in the coating agent can be firmly bonded together, the molecular weight is greatly increased and the coating performance, the inhibition, the heat stability and the salt pollution resistance of the coating agent are improved; therefore, the preparation method has a broad application prospect.

Description

technical field [0001] The invention discloses a preparation method of a coating agent and belongs to the technical field of oil and gas drilling. Background technique [0002] The coating agent is an important additive used in the drilling fluid system, which can effectively coat the cuttings, prevent the hydration of the cuttings and shale, prevent the collapse of the borehole wall, help the stability of the borehole wall, and increase the drilling speed. It also has the functions of reducing water loss, improving flow pattern and increasing lubricity. [0003] At present, polyacrylic polymer coating agent PAC141, zwitterionic polymer coating agent FA367 and polyacrylamide potassium coating agent K-PAM have been developed and used at home and abroad. It has shown good performance in the system and improved the rheology of the drilling fluid system, but it also showed some shortcomings in the process of field use: it is only suitable for a specific drilling fluid system, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/03C08F220/06C08F220/14C08F220/20
CPCC08F220/06C08F220/20C09K8/03C09K2208/08C09K2208/12C08F220/14
Inventor 褚文慧
Owner 褚文慧
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