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Particle-stabilized nanoemulsion lubricant for water-based drilling fluid and preparation method thereof

A water-based drilling fluid and nano-emulsion technology, which is applied in chemical instruments and methods, drilling compositions and other directions, can solve the problems of oil treatment agents being difficult to disperse, unable to achieve effective lubrication, and easy to separate out oil, etc. Synergy, lowering the coefficient of sliding friction, and stabilizing the adsorption film

Active Publication Date: 2020-12-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, commonly used drilling fluid lubricants include liquid lubricants such as mineral oil or vegetable oil, but oil treatment agents have the disadvantages of being difficult to disperse and easily separating out the oil phase
In addition, under high-load conditions, the oil film formed by the lubricant on the surface of the drill bit and the drill tool will be destroyed, and it will not be able to effectively lubricate

Method used

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  • Particle-stabilized nanoemulsion lubricant for water-based drilling fluid and preparation method thereof
  • Particle-stabilized nanoemulsion lubricant for water-based drilling fluid and preparation method thereof
  • Particle-stabilized nanoemulsion lubricant for water-based drilling fluid and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0014] The composition of the particle-stabilized nanoemulsion lubricant: 30 parts of methyl oleate, 10 parts of polyoxyethylene ether fatty alcohol AEO9, 20 parts of dodecyltrimethylammonium chloride, 20 parts of graphite oxide, and 20 parts of water.

[0015] Preparation method of particle-stabilized nanoemulsion lubricant: (1) Weigh each raw material according to the above mass fraction; (2) Add the weighed graphite oxide into methyl oleate, stir at room temperature at a stirring speed of 600rpm for 1h ; (3) Add the weighed polyoxyethylene ether fatty alcohol AEO9 and dodecyltrimethylammonium chloride into water, and stir for 1 hour at room temperature at a stirring speed of 600rpm; (4) Prepare in step 2 Add the oil phase to the water phase prepared in step 3, and stir at room temperature for 1 hour at a stirring speed of 600 rpm to prepare a particle-stabilized nanoemulsion lubricant.

Embodiment 2

[0017] The composition of the particle-stabilized nanoemulsion lubricant: 60 parts of ethyl oleate, 5 parts of polyoxyethylene ether fatty alcohol AEO20, 10 parts of octadecyltrimethylammonium chloride, 5 parts of expandable graphite, and 20 parts of water.

[0018] The preparation method of the particle-stabilized nanoemulsion lubricant is the same as in Example 1.

Embodiment 3

[0020] The composition of the particle-stabilized nanoemulsion lubricant: 40 parts of oleic acid, 25 parts of polyoxyethylene ether fatty alcohol AEO25, 10 parts of dodecyl dimethyl benzyl ammonium chloride, 5 parts of graphene, and 20 parts of water.

[0021] The preparation method of the particle-stabilized nanoemulsion lubricant is the same as in Example 1.

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Abstract

The invention relates to a particle-stabilized nanometer emulsion lubricant for water-based drilling fluids, and a preparation method thereof, wherein the particle-stabilized nanometer emulsion lubricant comprises 30-60% of fatty acids and ester derivatives thereof, 5-25% of a nonionic surfactant, 10-20% of a cationic surfactant, 5-20% of a solid lubricant, and 15-40% of water. According to the present invention, the particle-stabilized nanometer emulsion lubricant has good dispersibility in water-based drilling fluids, can overcome the disadvantages of difficult dispersion and easy oil phaseprecipitation of mineral oil or vegetable oil or other conventional liquid lubricants, can form the stable adsorption film on drill bits, drilling rods and well walls, can effectively reduce the friction coefficient of the friction surface, improve the lubrication performance and reduce the wear, and further can maintain good lubrication performance under extreme pressure or high load.

Description

technical field [0001] The invention designs a particle-stabilized nanoemulsion lubricant for water-based drilling fluid used in petroleum drilling engineering and a preparation method thereof. Background technique [0002] In recent years, with the increasing difficulty and complexity of oil exploration and development, the number of complex wells such as deep wells, ultra-deep wells, and extended-reach horizontal wells has continued to increase. The number of accidents is increasing, and higher requirements are placed on the lubrication performance of drilling fluids. [0003] The improvement of drilling fluid lubrication performance is mainly by adding lubricants to the drilling fluid to reduce the frictional resistance between the drill bit and the rock surface, the drilling tool and the casing or the well wall, and reduce the occurrence of accidents such as pipe sticking. [0004] At present, the commonly used drilling fluid lubricants include liquid lubricants such as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/03C09K8/035
CPCC09K8/032C09K8/035C09K2208/34
Inventor 王康封心领袁俊秀靳志超徐冬梅杨智中
Owner CHINA PETROLEUM & CHEM CORP
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