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High temperature resistant shear strength improving agent for water-based drilling fluid and preparation method thereof

A technology of water-based drilling fluid and cutting agent, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of excessive viscosity increasing effect and low temperature resistance, and increase the probability of effective interaction , low apparent viscosity, rich variety of effects

Active Publication Date: 2019-07-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of excessive viscosity increasing effect and low temperature resistance (<150°C) in the existing water-based drilling fluid cutting agent products, the present invention proposes a high-temperature resistant water-based drilling fluid cutting agent, specifically The invention relates to a high temperature resistant water-based drilling fluid cutting agent and its preparation method

Method used

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  • High temperature resistant shear strength improving agent for water-based drilling fluid and preparation method thereof
  • High temperature resistant shear strength improving agent for water-based drilling fluid and preparation method thereof
  • High temperature resistant shear strength improving agent for water-based drilling fluid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Add 800 parts of deionized water to the reaction kettle equipped with stirrer, temperature controller, air duct and reflux condenser, add 110 parts of acrylamide (monomer A), 30 parts of N-vinylpyrrolidone (monomer B), 30 parts of C18PEGMA macromer, produced by Evonik Industrial Group (monomer D) and 30 parts of methacryloyloxyethyltrimethylammonium chloride (monomer C), stirred with 30% hydrogen The sodium oxide solution adjusted the pH value of the monomer solution to 9, and finally added 2 parts of pentaerythritol and stirred until the pentaerythritol was completely dissolved.

[0050] Start the temperature control device, control the temperature of the monomer solution to 50°C, and at the same time, pass nitrogen gas under stirring for 40 minutes, then add 7 parts of ammonium persulfate, and react for 5 hours. After the reaction is finished, cool to room temperature, discharge, cut, dry, and pulverize, and the obtained powder product is the temperature-resistant wat...

Embodiment 2

[0052] Add 800 parts of deionized water to the reaction kettle equipped with stirrer, temperature controller, air duct and reflux condenser, add 110 parts of acrylamide (monomer A), 30 parts of N-vinylpyrrolidone (monomer B), 30 parts of C18PEGMA macromer (monomer D) and 30 parts of methacryloxyethyltrimethylammonium chloride (monomer C), after stirring evenly, adjust the monomer with 30% sodium hydroxide solution The pH value of the solution was 9, and finally 2 parts of dipentaerythritol was added and stirred until the dipentaerythritol was completely dissolved.

[0053] Start the temperature control device, control the temperature of the monomer solution to 50°C, at the same time, pass nitrogen gas under stirring for 40 minutes, then add 8 parts of ammonium persulfate, and react for 5 hours. After the reaction is finished, cool to room temperature, discharge, cut, dry, and pulverize, and the obtained powder product is the temperature-resistant water-based drilling fluid cut...

Embodiment 3

[0055] Add 800 parts of deionized water to the reaction kettle equipped with stirrer, temperature controller, air duct and reflux condenser, add 160 parts of acrylamide (monomer A), 20 parts of N-vinylpyrrolidone (monomer B), 10 parts of C18PEGMA macromer (monomer D) and 10 parts of methacryloyloxyethyltrimethylammonium chloride (monomer C), after stirring evenly, adjust the monomer with 30% sodium hydroxide solution The pH value of the solution was 9, and finally 2 parts of pentaerythritol was added and stirred until the pentaerythritol was completely dissolved.

[0056] Start the temperature control device, control the temperature of the monomer solution to 50°C, and at the same time, pass nitrogen gas under stirring for 40 minutes, then add 7 parts of ammonium persulfate, and react for 5 hours. After the reaction is finished, cool to room temperature, discharge, cut, dry, and pulverize, and the obtained powder product is the temperature-resistant water-based drilling fluid ...

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Abstract

The invention relates to a high temperature resistant shear strength improving agent for a water-based drilling fluid and a preparation method thereof in the field of petroleum drilling working fluids. The high temperature resistant shear strength improving agent for a water-based drilling fluid comprises the following copolymerized components in percentage by weight: (1) 40%-80% of monomer A; (2)10%-20% of monomer B; (3) 5%-20% of monomer C; (4) 5%-20% of monomer D, wherein the monomer A is at least one selected from acrylamide, N, N-dimethylacrylamide, isobutyl acrylamide and acrylonitrile;the monomer B is selected from N-vinyl pyrrolidone; the monomer C is at least one selected from methacryloyloxyethyl trimethyl ammonium chloride and dimethyl diallyl ammonium chloride; and the monomer D is selected from amphiphilic macromolecular monomer C18PEGMA. The high temperature resistant shear strength improving agent for a water-based drilling fluid disclosed in the invention has good shear strength improving performance and good temperature resistance, with the capability of resisting a temperature of up to 150 DEG C, and thus can be used as the shear strength improving agent for a petroleum drilling working fluid so as to improve the suspension stabilizing capability of the working fluid on a lightening admixture or a weighting admixture and enhance the cuttings carrying capacity and the borehole cleaning capability of the system.

Description

technical field [0001] The invention relates to the field of petroleum drilling working fluids, and more particularly relates to a high-temperature-resistant water-based drilling fluid cutting agent and a preparation method thereof. Background technique [0002] Cutting agent is a core treatment agent for drilling fluid. Its main function is to increase the shear force of the drilling fluid system, enhance the cuttings carrying capacity of the drilling fluid, and improve the wellbore purification effect of the drilling fluid. In addition, in low-density or high-density drilling fluids, it is often necessary to add solid-phase materials such as hollow microbead lightening agents or barite weighting agents. Due to the density difference between the solid-phase materials and the drilling fluid, in order to prevent the lightening agent from floating or For the weighting agent to settle, it is necessary to increase the shear force of the drilling fluid to enhance the suspension p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035C08F283/06C08F220/56C08F220/54C08F220/48C08F226/10C08F220/34C08F226/04C08F2/10C08F4/40
CPCC08F2/10C08F4/40C08F283/065C09K8/035C08F220/56C08F220/54C08F220/48C08F226/10C08F220/34C08F226/04
Inventor 赵素丽杨小华林永学陈铖杨帆
Owner CHINA PETROLEUM & CHEM CORP
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