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Ultralow-temperature drilling fluid base fluid as well as preparation method and application thereof

A drilling fluid and ultra-low temperature technology, applied in chemical instruments and methods, drilling compositions, organic chemistry, etc., can solve the problems of poor low temperature resistance and high irritation, reduce the surface area and pore size, and reduce the preparation method Simple, non-irritating odor effect

Active Publication Date: 2022-08-02
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the deficiencies in the prior art, the main purpose of the present invention is to solve the problems of low temperature resistance and high irritation of the drilling fluid base fluid in the polar drilling process; to provide an ultra-low temperature drilling fluid base fluid and its preparation method and application

Method used

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  • Ultralow-temperature drilling fluid base fluid as well as preparation method and application thereof

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Effect test

Embodiment 1

[0028] A preparation method of ultra-low temperature drilling fluid base fluid, comprising the steps of:

[0029] 1) Dissolve the promoter zinc chloride in ethanol at room temperature (the mass ratio of the promoter zinc chloride to the ethanol volume is 0.05:1 g / mL), then add the main catalyst montmorillonite K-10, montmorillonite K The mass ratio of -10 to zinc chloride is 10:3. After stirring evenly, the ethanol is distilled off under reduced pressure, and the catalyst mixture is obtained after activating it at 120 °C for 4 hours;

[0030] 2) Add the catalyst mixture and hexene with a mass ratio of 0.05:1 into the high temperature and high pressure reaction kettle, seal it, add the pressure of 1.5 MPa and then heat up to 160 ° C, and react for 3 hours to obtain a post-reaction solution;

[0031] 3) Filtering the solution after the reaction, and distilling under reduced pressure to remove unreacted monomers to obtain an ultra-low temperature drilling fluid base fluid for pol...

Embodiment 2

[0033] A preparation method of ultra-low temperature drilling fluid base fluid, comprising the steps of:

[0034] 1) Dissolve the promoter zinc chloride in ethanol at room temperature (the mass ratio of the promoter zinc chloride to the ethanol volume is 0.05:1 g / mL), then add the main catalyst montmorillonite K-10, montmorillonite K The mass ratio of -10 to zinc chloride is 2.5:1. After stirring evenly, the ethanol is distilled off under reduced pressure, and the catalyst mixture is obtained after activating it at 120 °C for 4 hours;

[0035] 2) Add the catalyst mixture and hexene with a mass ratio of 0.05:1 into the high temperature and high pressure reaction kettle, seal it, load the pressure of 1.6 MPa and then heat up to 160 ° C, and react for 3 hours to obtain a post-reaction solution;

[0036] 3) Filtering the solution after the reaction, and distilling under reduced pressure to remove unreacted monomers to obtain an ultra-low temperature drilling fluid base fluid for p...

Embodiment 3

[0038] A preparation method of ultra-low temperature drilling fluid base fluid, comprising the steps of:

[0039] 1) Dissolve the promoter zinc chloride in ethanol at room temperature (the mass ratio of the promoter zinc chloride to the ethanol volume is 0.05:1 g / mL), then add the main catalyst montmorillonite K-10, montmorillonite K The mass ratio of -10 to zinc chloride is 20:9. After stirring evenly, the ethanol is distilled off under reduced pressure, and the catalyst mixture is obtained after activating it at 120 °C for 4 hours;

[0040] 2) Add the catalyst mixture and hexene with a mass ratio of 0.04:1 into the high-temperature and high-pressure reaction kettle, seal it, add the pressure of 1.7 MPa and then heat up to 160° C. After reacting for 2 hours, a post-reaction solution is obtained;

[0041] 3) Filtering the solution after the reaction, and distilling under reduced pressure to remove unreacted monomers to obtain an ultra-low temperature drilling fluid base fluid ...

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Abstract

The invention provides ultralow-temperature drilling fluid base fluid as well as a preparation method and application thereof. The ultralow-temperature drilling fluid base fluid is prepared from alpha-olefin through polymerization reaction under the action of a cocatalyst zinc chloride and a main catalyst montmorillonite K-10. According to the invention, the problems of poor low-temperature resistance, high irritation and the like of the drilling fluid base fluid in the polar region drilling process are solved; the obtained ultralow-temperature drilling fluid base fluid can be used at the ultralow temperature of-55 DEG C in a polar region, has no pungent smell, and provides technical support for research and development of polar region drilling fluid.

Description

technical field [0001] The invention relates to the technical field of polar drilling, in particular to an ultra-low temperature drilling fluid base fluid and a preparation method and application thereof. Background technique [0002] The Antarctic continent is rich in resources, and as many as 220 kinds of minerals have been discovered. During drilling in Antarctica, drilling fluids must be used to maintain wellbore stability, but conventional drilling fluids cannot be used in Antarctica's harsh low-temperature surface environment (average -55°C) and complex subglacial geological environment. Chinese patent document CN103146366A discloses a kind of two-component ester-based ultra-low temperature drilling fluid for polar use. The invention uses environment-friendly low-temperature resistant coconut oil heptyl ester derivatives (ESTISOLTM) as raw materials to prepare drilling fluid; wherein the base fluid is composed of coconut oil heptyl ester 140, and the base weight liqui...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/06C07C2/14C07C11/02
CPCC09K8/06C07C2/14C07C11/02
Inventor 刘敬平王宗轮孙金声吕开河张宪法王金堂白英睿金家锋黎剑黄贤斌史胜龙
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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