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Drilling fluid lubricant composition and preparation method thereof and water-based drilling fluid and application thereof

A technology of lubricant composition and water-based drilling fluid, which is applied in the field of drilling fluid, can solve the problems that the lubricant does not have anti-wear and anti-friction properties, and the lubricant does not have high temperature resistance, so as to improve oxidation stability and lubricating performance, lubricate The effect of excellent performance and rich source of raw materials

Inactive Publication Date: 2019-01-04
中石化石油工程技术服务有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects that the lubricants of animal and vegetable oils in the prior art do not have high temperature resistance, or although the lubricants of animal and vegetable oils have the characteristics of high temperature resistance, they do not have good anti-wear and anti-wear properties. friction performance defects, and provide a lubricant composition for drilling fluid and its preparation method and water-based drilling fluid and its application

Method used

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  • Drilling fluid lubricant composition and preparation method thereof and water-based drilling fluid and application thereof
  • Drilling fluid lubricant composition and preparation method thereof and water-based drilling fluid and application thereof
  • Drilling fluid lubricant composition and preparation method thereof and water-based drilling fluid and application thereof

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preparation example Construction

[0032] According to the present invention, the preparation method of the capsule comprises the following steps:

[0033] (a) ultrasonically oscillating sulfonated polyimide, water and a second dispersant to obtain a dispersion;

[0034] (b) mixing and stirring the phenolic resin prepolymer and the dispersion liquid, and then performing microwave curing.

[0035] In step (a), sulfonated polyimide, water and a second dispersant may be added to an emulsifier equipped with an ultrasonic cleaner and a stirrer, and the ultrasonic oscillation may be carried out at room temperature , for example, the temperature is 18-25°C, and the ultrasonic oscillation time can be 20-45min to disperse the sulfonated polyimide in water; preferably, the mass of the amount of sulfonated polyimide, water and the second dispersant The ratio is (2-3):(10-15):1. In addition, the second dispersant can be sodium dodecylbenzenesulfonate, sodium dodecylbenzenesulfate, polyoxyethylene sorbitan monooleate, sod...

Embodiment 1

[0089] This example is used to illustrate the preparation of lubricant composition and water-based drilling fluid by the method of the present invention.

[0090] The lubricant composition of this embodiment includes the following components and parts by weight: 32 parts by weight of modified vegetable oil, 45 parts by weight of biodiesel, 6 parts by weight of extreme pressure antiwear agent, sulfonated polyimide microcapsules coated with phenolic resin ( Capsules) 9 parts by weight, 3 parts by weight of the first dispersant and 7 parts by weight of the defoamer.

[0091] Wherein, modified vegetable oil is epoxy-modified rapeseed oil, and the preparation method of this epoxy-modified rapeseed oil comprises the following steps:

[0092] Step (A): Add 18g of rapeseed oil into the reactor, then dropwise add 6g of potassium hydroxide methanol solution with a mass concentration of 6%, react at 60°C for 1h after the drop, wash until neutral after the reaction, and remove water Drie...

Embodiment 2

[0111] This example is used to illustrate the preparation of lubricant composition and water-based drilling fluid by the method of the present invention.

[0112] The lubricant composition of this embodiment includes the following components and parts by weight: 40 parts by weight of modified vegetable oil, 50 parts by weight of biodiesel, 7 parts by weight of extreme pressure antiwear agent, 12 parts by weight of sulfonated polyimide microcapsules coated with phenolic resin parts by weight, 4 parts by weight of dispersant and 8 parts by weight of defoamer.

[0113] Wherein, modified vegetable oil is epoxy-modified rapeseed oil, and the preparation method of this epoxy-modified rapeseed oil comprises the following steps:

[0114] Step (A): Add 16 g of rapeseed oil into the reactor, then drop 5 g of potassium hydroxide methanol solution with a mass concentration of 7%, react at 62° C. for 1.5 h after the drop, wash until neutral after the reaction, remove Drying with water yie...

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Abstract

The invention belongs to the technical field of drilling fluid for the petroleum and natural gas industry, and relates to a drilling fluid lubricant composition and a preparation method thereof and awater-based drilling fluid and application thereof. The lubricant composition comprises modified vegetable oil, biodiesel, capsule particles, a first dispersant, an extreme pressure antiwear additiveand a defoaming agent, the capsule particles comprise internal materials and capsule materials covering the internal materials, the capsule materials are made of phenolic resin, and the internal materials include sulfonated polyimides, water and a second dispersant. The capsule particles are introduced to the drilling fluid lubricant composition, so that the composition in the drilling fluid is not affected by high temperature, is easy to degrade, has good cloud point, has low influence to rheological property of the drilling fluid, and can meet requirements on lubricating property of the drilling fluid better.

Description

technical field [0001] The invention belongs to the technical field of drilling fluid in the petroleum and natural gas industry, and relates to a lubricant composition for drilling fluid and a preparation method thereof, water-based drilling fluid and application thereof. Background technique [0002] As we all know, in the oilfield development industry, the lubricating performance of drilling fluid has a great influence on drilling work, so the lubricant used in drilling fluid is required to enable the drilling fluid to reduce the torque, wear and fatigue of the drilling tool, and extend the bearing of the drill bit Long service life, while preventing sticking and sticking of drill bits, reducing mud bagging of drill bits, etc. Drilling fluid lubricants can be divided into many categories, including mineral oils and animal and vegetable oils. Among them, mineral oil lubricants have gradually lost their competitive advantage due to their greater environmental pollution and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035B01J13/20
CPCB01J13/206C09K8/035C09K2208/34
Inventor 刘均一陈二丁王宝田宿振国黄维安柴金鹏郭保雨蒋莉李蕾赵红香
Owner 中石化石油工程技术服务有限公司
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