Preparation method for macromolecule emulsion coating agent for drilling fluid

A technology of polymer emulsion and coating agent, which is applied in the direction of drilling composition, chemical instruments and methods, etc., can solve the problems that cannot meet the requirements of on-site construction, achieve obvious oil layer protection, reduce friction coefficient, and use convenient effect

Active Publication Date: 2014-04-09
北京奥凯立科技发展股份有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The original conventional coating agent can no longer meet the requirements of on-site construction

Method used

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  • Preparation method for macromolecule emulsion coating agent for drilling fluid
  • Preparation method for macromolecule emulsion coating agent for drilling fluid
  • Preparation method for macromolecule emulsion coating agent for drilling fluid

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Embodiment Construction

[0019] In order to illustrate the technical solution of the present invention more clearly, the following specific examples further illustrate the present invention in detail.

[0020] The preparation method of polymer emulsion coating agent for drilling fluid of the present invention comprises the following steps:

[0021] (1) Preparation of raw materials: Under the condition that the temperature does not exceed 35°C, adjust the pH value of acrylic acid to 8.5 with 50% (wt%) potassium hydroxide to form an aqueous solution of potassium acrylate for later use, and take 2-acrylamide-2-methyl Propanesulfonic acid is formulated into a 50% (wt%) aqueous solution and the pH value is adjusted to 8.5 with 50% (wt%) potassium hydroxide to form a 2-acrylamide-2-methylpropanesulfonic acid potassium salt aqueous solution for subsequent use, and acrylamide Prepared into 50% (wt%) aqueous solution for later use,

[0022] (2) Potassium acrylate aqueous solution, 2-acrylamide-2-methylpropane...

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Abstract

The invention discloses a preparation method for a macromolecule emulsion coating agent for a drilling fluid. The mass ratio of a potassium acrylate aqueous solution, a 2-acrylamide-2-methpropanesulfonic acid potassium salt aqueous solution, a 50% acrylamide aqueous solution, white oil, an emulsifying agent SP-80 and a 8% ethylene diamine tetraacetic acid (EDTA) aqueous solution is (25-30): (5-10): (30-40): (23-28): (2.5-3.0): (0.5-1.0). The potassium acrylate aqueous solution, the 2-acrylamide-2-methpropanesulfonic acid potassium salt aqueous solution, the 50% acrylamide aqueous solution, the white oil, the emulsifying agent SP-80 and the 8% ethylene diamine tetraacetic acid (EDTA) aqueous solution are emulsified in a reacting kettle, the reacting kettle is placed in water bath to be subjected to water-bath heating until the temperature reaches to 40 DEG C, and 0.5%o hydrogen peroxide is dropwise added in the reacting kettle until the reaction is finished. The macromolecule emulsion coating agent prepared by the method has the advantages that the macromolecule emulsion coating agent has good coating capability, inhibitive capability, thermostability, salt-resistant and anti-pollution capabilities and lubricating capacity, the coefficient of friction resistance of a mud cake can be effectively reduced, the emulsion particle size is equal to the size of general pore space of low-permeability and ultra-low permeability oil fields, the plugging is effective, the protective effect on an oil layer is evident, the discharge is easy, damage to the oil layer is absent, and the macromolecule emulsion coating agent is suitable for water base and oil base drilling fluid systems.

Description

technical field [0001] The invention relates to a preparation method of a polymer emulsion coating agent for drilling fluid. Background technique [0002] With the development of drilling technology, various high-difficulty well positions such as high-angle wells, horizontal wells, expansion wells, extension wells, and directional deflection wells are also increasing. There are also higher requirements in terms of decentralization and increased drilling speed. The original conventional coating agent can no longer meet the requirements of on-site construction. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a preparation method of a polymer emulsion coating agent for drilling fluid; the prepared polymer emulsion coating agent has good inhibitory and lubricating properties, good thermal stability and no environmental pollution. [0004] In order to solve the problems of the technologies described above, the prese...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F220/06C08F220/58C08F2/24C09K8/035
Inventor 王雷周文欣卢丙朵韩晓华卢胜娟王欣王文瑞张晓坡王铁林黄海军
Owner 北京奥凯立科技发展股份有限公司
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