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Preparation method of drilling fluid lubricants

A lubricant and drilling fluid technology, which is applied in the field of preparation of drilling fluid lubricants, can solve the problems of easy decomposition of lubricants, reduced lubricating ability, and foaming of drilling fluids, and achieves strong mutual solubility, reduced friction, and aging resistance. good performance

Inactive Publication Date: 2017-08-25
周荣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem mainly solved by the present invention: aiming at the defect that the existing drilling fluid lubricant is easy to decompose under the high-temperature aging environment, and the lubricating ability is greatly reduced, which is easy to cause the drilling fluid to foam, and it provides a method of using a variety of waste oils to prepare The method of the drilling fluid lubricant, the present invention first distills waste oil and dichloromethane after stirring and reacting, heats the obtained reactant and propylene oxide to react, then adds boric acid, carbon tetrachloride, etc. The modifier is obtained by distillation, and then the discarded rapeseed oil frying oil and lard are heated and filtered, and the filtrate is reacted with zeolite, citric acid, etc., and the modified mixed oil obtained is mixed with modifier, coconut oil fatty acid monoethanolamide, etc. The drilling fluid lubricant can be obtained by stirring and discharging the material. The drilling fluid lubricant prepared by the present invention has good high temperature resistance and aging resistance, is not easy to decompose and fail under high temperature environment, and will not cause drilling fluid foaming phenomenon, and Good comprehensive lubrication performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026] According to the mass ratio of 2:1, weigh waste oil and methylene chloride and add them to a three-necked flask, stir and mix for 10 minutes, add phosphorus pentasulfide 2% waste oil quality, continue stirring for 15 minutes, put it into a water bath, heat up to 80 ° C, and keep warm After stirring for 1 hour, the product in the three-necked flask was distilled under reduced pressure at 50 Pa for 20 minutes, and the reactant was obtained after distillation. The reactant and propylene oxide were mixed according to the mass ratio of 1:2, and put into the three-necked flask. Stir and mix at min speed for 20 minutes. After stirring, put it into a water bath and heat to 60°C. Stir and react for 2 hours. After the reaction, cool to room temperature to obtain the reaction solution. The water device is on the three-necked flask, and sequentially add 1 times the mass of boric acid to carbon tetrachloride and 0.3% of the mass of boric acid to 95% sulfuric acid solution, heat to re...

example 2

[0029] According to the mass ratio of 2:1, weigh waste oil and methylene chloride and add them into a three-necked flask, stir and mix for 10-15 minutes, then add 2-5% phosphorus pentasulfide of waste oil, continue stirring for 15-20 minutes, then put it into a water bath, Raise the temperature to 80-85°C, insulate and stir the reaction for 1-2 hours, then distill the product in the three-neck flask under reduced pressure for 20-30 minutes under the condition of 50-100 Pa, and obtain the reactant after distillation. Mix oxypropane and put it into a three-necked flask, stir and mix at a speed of 500-600r / min for 20-30min, put it in a water bath and heat it to 60-70°C after the stirring is completed, stir and react for 2-3h, and cool to To obtain the reaction solution at room temperature, add 20-30% boric acid to the three-necked flask, mix for 10-15 minutes, install the water separator on the three-necked flask, and add 1-2 times the mass of boric acid to the three-necked flask ...

example 3

[0032] According to the mass ratio of 2:1, weigh waste oil and methylene chloride and add them into a three-necked flask, stir and mix for 10-15 minutes, then add 2-5% phosphorus pentasulfide of waste oil, continue stirring for 15-20 minutes, then put it into a water bath, Raise the temperature to 80-85°C, insulate and stir the reaction for 1-2 hours, then distill the product in the three-neck flask under reduced pressure for 20-30 minutes under the condition of 50-100 Pa, and obtain the reactant after distillation. Mix oxypropane and put it into a three-necked flask, stir and mix at a speed of 500-600r / min for 20-30min, put it in a water bath and heat it to 60-70°C after the stirring is completed, stir and react for 2-3h, and cool to To obtain the reaction solution at room temperature, add 20-30% boric acid to the three-necked flask, mix for 10-15 minutes, install the water separator on the three-necked flask, and add 1-2 times the mass of boric acid to the three-necked flask ...

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PUM

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Abstract

The invention discloses a preparation method of drilling fluid lubricants, and belongs to the technical field of drilling fluid additive preparation. The method includes the steps of firstly, stirring swill-cooked dirty oil and dichloromethane to react, distilling, and heating the obtained resultant and propylene oxide to react; secondly, adding boric acid, carbon tetrachloride and the like to heat and undergo reflux reaction, and filtering to collect filtrate for distilling to obtain modifiers; thirdly, heating and filtering waste rapeseed oil and frying oil and lard, and collecting filtrate to react with zeolite, citric acid and the like; finally, mixing the obtained modified mixed oil with the modifiers, monoethanolamine of coconut oil fatty acid and the like, and then obtaining the drilling fluid lubricants. The drilling fluid lubricants prepared by the preparation method has the advantages of having good functions of anti-high temperature, aging resistance and comprehensive lubricating properties, and being difficult to be decomposed and lose efficacy under high temperature environment, so as to not cause foaming phenomenon of drilling fluid.

Description

technical field [0001] The invention discloses a method for preparing a drilling fluid lubricant, and belongs to the technical field of drilling fluid additive preparation. Background technique [0002] Drilling fluid is a working fluid that can carry cuttings, cool and lubricate drill bits, balance formation pressure, protect wellbore stability and protect oil layers from damage during drilling. Its performance directly affects drilling efficiency and downhole safety. And cost control is an important part of drilling engineering technology. [0003] In recent years, directional and horizontal well drilling technologies have been popularized and applied on a large scale, and the problem of drilling friction is particularly prominent. How to reduce drilling friction and improve the lubrication performance of drilling fluid has become the key to directional and horizontal well drilling. The most effective way to improve the lubricity of drilling fluid is to add drilling fluid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035
CPCC09K8/035C09K2208/34
Inventor 周荣葛明月孙冬
Owner 周荣
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