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A kind of water-based drilling fluid lubricant and magnetic polyether used therein and preparation method thereof

A water-based drilling fluid and lubricant technology, which is applied in the field of oil drilling, can solve the problems of continuous lubrication in long horizontal sections, etc., achieve good cycle stability, improve continuous lubrication effect, and improve lubrication effect

Active Publication Date: 2022-05-06
YANGTZE UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the above-mentioned water-based drilling fluid lubricants ignore that the lubricant is preferentially adsorbed to the surface of the solid particles in the drilling fluid during the process of competitive adsorption and film formation of the drilling tool and the solid particles in the drilling fluid, and the effective lubricating components are absorbed by formation minerals such as drilling cuttings. Problems such as excessive consumption after adsorption cannot effectively solve the problem of continuous lubrication in long horizontal sections

Method used

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  • A kind of water-based drilling fluid lubricant and magnetic polyether used therein and preparation method thereof
  • A kind of water-based drilling fluid lubricant and magnetic polyether used therein and preparation method thereof
  • A kind of water-based drilling fluid lubricant and magnetic polyether used therein and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of magnetic polyether: Weigh 6g of hydroxylated nano-Fe 3 o 4 The magnetic particles and 1g of monomethylamine are fully mixed at room temperature, and the reaction system is heated to 70°C under nitrogen protection with a purity of 99.99%. The reaction temperature is maintained and propylene oxide and 1,2-butylene oxide are added separately In the reaction system, after 12-24 hours of mechanical stirring at constant temperature, the stirring was stopped, and the reaction system was naturally cooled to room temperature, and methanol was slowly added to the reaction system to end the polyether chain segment with a methyl group to obtain a magnetic Fe 3 o 4 Polyether crude product;

[0030] Remove the unreacted raw materials and methanol from the crude magnetic polyether product under reduced pressure, add concentrated hydrochloric acid to neutralize the pH value of the system to neutral, wash with deionized water, leave the liquid separation to remove the w...

Embodiment 2

[0034] Preparation of magnetic polyether: Weigh 8g of hydroxylated nano-Ni-Fe magnetic particles and 1.5g of dimethylamine and mix them fully at room temperature, and heat the reaction system to 80°C under nitrogen protection with a purity of 99.99%, and keep the reaction temperature Add 40g of propylene oxide and 30g of 1,2-butylene oxide into the reaction system respectively, and then stop stirring at 80°C for 24 hours with mechanical stirring at a constant temperature, then cool down to room temperature naturally, and slowly add 10g of methanol into the reaction system to make the polymerization The ether segment is terminated with a methyl group to obtain a crude magnetic Ni-Fe polyether product;

[0035] Remove the unreacted raw materials and methanol from the crude magnetic polyether product under reduced pressure, add concentrated hydrochloric acid to neutralize the pH value of the system to neutral, wash with deionized water, leave the liquid separation to remove the wa...

Embodiment 3

[0039] Weigh 14g of hydroxylated nano-cobalt oxide magnetic particles and 2g of liquid basic catalyst trimethylamine and mix them thoroughly at room temperature, heat the reaction system to 90°C under nitrogen protection with a purity of 99.99%, maintain the reaction temperature and mix 30g of epoxy Propane and 30g 1,2-butylene oxide were added to the reaction system respectively, and the reaction was mechanically stirred at a constant temperature at 90°C for 24 hours, then the stirring was stopped, and the reaction system was naturally cooled to room temperature, and 10g of methanol was slowly added to the reaction system to make the polyether chain segment form in form End-capping obtains magnetic polyether crude product;

[0040]Remove the unreacted raw materials and methanol from the crude magnetic polyether product under reduced pressure, add concentrated hydrochloric acid to neutralize the pH value of the system to neutral, wash with deionized water, leave the liquid sepa...

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Abstract

The invention relates to a magnetic polyether for water-based drilling fluid lubricant and its preparation method and application, which is obtained by grafting and copolymerizing hydroxylated magnetic nanoparticles as the initiator and propylene oxide and butylene oxide as structural units; Hydroxylated Fe nanoparticles 3 o 4 Any one or more of Ni-Fe and cobalt oxide nanoparticles, according to parts by weight, the magnetic polyether contains 5% to 20% of magnetic nanoparticles, 20% to 60% of propylene oxide chain segments, ring 10%-20% of oxybutane segment. The magnetic polyether for water-based drilling fluid lubricant provided by the present invention exhibits excellent targeted lubrication, significantly improves the adsorption effect of the lubricant on the surface of the drilling tool, and also has long lubrication duration and good cycle stability. The advantages of good compatibility with different water-based drilling fluids are especially suitable for horizontal wells with long open-hole sections.

Description

technical field [0001] The invention belongs to the technical field of petroleum drilling, in particular to the field of high-performance water-based drilling fluid and high-efficiency lubricant, in particular to a water-based drilling fluid lubricant and a magnetic polyether used therein. Background technique [0002] At present, water-based drilling fluids still have relatively frequent engineering problems such as back pressure, pipe sticking and insufficient water power transmission in the construction process of long horizontal sections of complex structures. The main reason is the lubrication of lubricants in water-based drilling fluids. Insufficient persistence. Therefore, research and development on the continuous lubricity of water-based drilling fluid lubricants and improving the continuous lubrication performance of oil-based lubricants will be an important part of the application of water-based drilling fluids in long open-hole horizontal wells in the future. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/28C09K8/03
CPCC08G65/2606C09K8/03C09K2208/34C09K2208/10
Inventor 卢福伟王静李瑞嵩刘超王越支罗霄赵世贵
Owner YANGTZE UNIVERSITY
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