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Environmentally-friendly microemulsion lubricant used for well drilling fluid and preparation method of lubricant

A microemulsion lubricant and drilling fluid technology, which is applied in the field of drilling industry chemical industry, can solve the problems of no environmental protection performance evaluation, no microemulsion lubricant research, poor compatibility of water-based drilling fluid, etc., to achieve good compatibility, The effect of reducing the adhesion coefficient of mud cake and reducing the friction coefficient

Inactive Publication Date: 2017-12-12
SINOPEC SSC +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But the inventor finds in the course of further research, the prior art still exists following defective: 1. do not carry out research on the microemulsion lubricant that oil industry drilling fluid is used; 2. the lubricant cost of stable emulsion system is higher, and water-based drilling The compatibility of the solution is not good; ③ All studies do not involve environmental protection performance evaluation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Prepare the raw materials required for the preparation of environmental protection microemulsion lubricants for drilling fluids with the following weight percentages, specifically: the weight percentage of refined waste oil is 10%~30%, the weight percentage of surfactant is 10%~15%, n-butanol The weight percentage is 10%~20%, the weight percentage of the inorganic salt is 2%~4%, and the balance is water.

[0016] After the preparation of raw materials is completed, the microemulsion lubricant is prepared according to the following steps: first pour water into the reaction kettle, and then slowly mix sodium dodecylbenzenesulfonate and Span 80 at a stirring speed of 2000r / min-3000r / min Ratio 5:2 Add to the reaction kettle, the total amount is 10%. After mixing evenly, slowly add 2% sodium chloride, but after it is completely dissolved, add 20% n-butanol and 30% refined waste oil, static Leave on for 5-10 hours.

Embodiment 2

[0018] Prepare the raw materials required for the preparation of environmental protection microemulsion lubricants for drilling fluids with the following weight percentages, specifically: the weight percentage of refined waste oil is 10%~30%, the weight percentage of surfactant is 10%~15%, n-butanol The weight percentage is 10%~20%, the weight percentage of the inorganic salt is 2%~4%, and the balance is water.

[0019] After the preparation of the raw materials is completed, the microemulsion lubricant is prepared according to the following steps: first pour water into the reaction kettle, and then slowly mix sodium lauryl sulfate and Span 80 at a stirring speed of 2000r / min-3000r / min in proportion to 4 : 1 into the reaction kettle, the total amount is 15%, after mixing evenly, slowly add 4% sodium chloride, but after completely dissolving, add 10% n-butanol and 30% refined waste oil, let stand for 5 -10 hours.

Embodiment 3

[0021] Prepare the raw materials required for the preparation of environmental protection microemulsion lubricants for drilling fluids with the following weight percentages, specifically: the weight percentage of refined waste oil is 10%~30%, the weight percentage of surfactant is 10%~15%, n-butanol The weight percentage is 10%~20%, the weight percentage of the inorganic salt is 2%~4%, and the balance is water.

[0022] After the preparation of raw materials is completed, the microemulsion lubricant is prepared according to the following steps: first pour water into the reaction kettle, and then slowly mix sodium dodecylbenzenesulfonate and Span 80 at a stirring speed of 2000r / min-3000r / min The proportion is 4:1, add it into the reaction kettle, the total amount is 15%, after mixing evenly, slowly add 4% sodium chloride, but after it is completely dissolved, add 10% n-butanol and 10% refined waste oil, static Leave on for 5-10 hours.

[0023] Further utilizing the LB550 type ...

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Abstract

The invention relates to the technical field of well drilling industry chemical engineering, and especially relates to an environmentally-friendly microemulsion lubricant used for a well drilling fluid and a preparation method of the lubricant. The micro emulsion lubricant can match with the water-based well drilling fluid, and influences on a well drilling fluid rheological property is relatively small, so that a lubricating property of a well drilling fluid system is improved, frictional drag and a sticking coefficient are effectively reduced, and a drilling speed is improved. The environmentally-friendly microemulsion lubricant used for the well drilling fluid is composed of refined illegal cooking oil, a surfactant, an inorganic salt, n-butyl alcohol and water, wherein the weight content of the refined illegal cooking oil is 10%-30%, the weight content of the surfactant is 10%-15%, the weight content of the n-butyl alcohol is 10%-20%, the weight content of the inorganic salt is 2%-4%, and the balance of the water.

Description

technical field [0001] The invention relates to the field of drilling industry chemical technology, in particular to an environment-friendly microemulsion lubricant for drilling fluid and a preparation method thereof. Background technique [0002] Water-based drilling fluid is the most widely used type of drilling fluid and has always occupied a dominant position in actual field applications. However, in the construction process of horizontal wells and highly deviated wells, it is very necessary to develop a high-efficiency and stable lubricant for water-based drilling fluid because the friction coefficient of the well body is difficult to control. [0003] At present, a lot of research work has been done on improving the lubricity of drilling fluids in China, but there is a lack of research on microemulsion lubricants with stable thermodynamic properties that can be widely used in a wide temperature range. In "Research on LDZ~1 Water-Soluble Microemulsion Lubricant", Li De...

Claims

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Application Information

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IPC IPC(8): C09K8/03C09K8/035
CPCC09K8/03C09K8/035C09K2208/34
Inventor 夏晔蓝强黄志远王俊涛张敬辉陈健于雷周晓蕾李卉
Owner SINOPEC SSC
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