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Preparation method of high-performance organic bentonite for oil-based drilling fluid

A technology of oil-based drilling fluid and sodium-based bentonite, applied in drilling compositions, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of poor gelation and viscosity-increasing and cutting-lifting effects, and improve rheology Performance, rheology enhancement, performance enhancement effects

Inactive Publication Date: 2017-03-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, organic soils for drilling fluids on the market are generally poor in gelation and viscosity-increasing and cutting effects in white oil. Therefore, the preparation of organic soils for high-performance oil-based drilling fluids was studied.

Method used

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  • Preparation method of high-performance organic bentonite for oil-based drilling fluid

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Experimental program
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Effect test

Embodiment １

[0021] Disperse 50 parts of sodium base soil with an alkalinity coefficient of 3.5 into 700 parts of deionized water, stir at high speed to obtain a stable suspension, adjust the pH value of the suspension to 7~8, and set aside; 20 parts of dioctadecane Dimethyl benzyl ammonium chloride was dissolved in 300 parts of deionized water, and stirred evenly to make it a clear and transparent solution for later use. 10 parts of fatty acid polyoxyethylene ester RCOO (CH 2 CH 2 O) n H (n=9) was dissolved in 100 parts of deionized water and stirred evenly to make it a clear and transparent solution for later use. Under high-speed stirring, quickly add dioctadecyl dimethyl benzyl ammonium chloride solution to the suspension, react at 75°C for 1.5 hours, continue to add fatty acid polyoxyethylene ester solution, and stir for 1 hour . The product was cooled to room temperature, and the residual Cl in the product was repeatedly removed with deionized water - , filtered, and vacuum-drie...

Embodiment 2

[0023] Disperse 60 parts of sodium base soil with an alkalinity coefficient of 5 into 800 parts of deionized water, stir at high speed to obtain a stable suspension, adjust the pH value of the suspension to 7~8, and set aside; 22 parts of dioctadecane Dimethyl benzyl ammonium chloride was dissolved in 200 parts of ethanol, and stirred evenly to make it a clear and transparent solution for later use. 11 parts fatty acid polyoxyethylene ester RCOO (CH 2 CH 2 O)nH (n=12) was dissolved in 100 parts of deionized water and stirred evenly to make it a clear and transparent solution for later use. In the state of high-speed stirring, quickly add the dioctadecyldimethylbenzyl ammonium chloride solution to the suspension, react at 70°C for 1.5 hours, and continue to add fatty acid polyoxyethylene ester RCOO (CH 2 CH 2 O) nH (n=12) solution, stirred for 1 hour. The product was cooled to room temperature, and the residual Cl in the product was repeatedly removed with deionized water ...

Embodiment 3

[0025] Disperse 65 parts of sodium base soil with an alkalinity coefficient of 6 into 800 parts of deionized water, stir at high speed to obtain a stable suspension, adjust the pH value of the suspension to 7~8, and set aside; 24.8 parts of dioctadecane Dimethyl benzyl ammonium chloride was dissolved in 200 parts of ethanol, and stirred evenly to make it a clear and transparent solution for later use. 10.5 parts of fatty acid polyoxyethylene ester RCOO (CH 2 CH 2 O)nH (n=20) was dissolved in 100 parts of deionized water and stirred evenly to make it a clear and transparent solution for later use. In the state of high-speed stirring, quickly add the dioctadecyldimethylbenzyl ammonium chloride solution to the suspension, react at 70°C for 1.5 hours, and continue to add fatty acid polyoxyethylene ester RCOO (CH 2 CH 2 O) nH (n=20) solution, react for 1 hour. The product was cooled to room temperature, and the residual Cl in the product was repeatedly removed with deionized wa...

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Abstract

The invention belongs to the technical field of petroleum chemical industry, and relates to a preparation method of high-performance organic bentonite for an oil-based drilling fluid. The preparation method comprises the steps: dissolving 55-75 parts of a sodium-based bentonite dry material in 600-900 parts of deionized water, to form a suspension system a; mixing and dissolving 15-35 parts of a quaternary ammonium organic modifier in 100-300 parts of a solvent, to form a uniform system b; dissolving 10-15 parts of an organic auxiliary agent in 100-150 parts of a solvent, to form a uniform system c; adding the system b to the suspension system a, carrying out a reaction for 1-2 h at the temperature of 70-90 DEG C, to form a uniform system d; adding the system c to the suspension system d, and carrying out a reaction for 1-2 h at the temperature of 70-90 DEG C; and cooling the product to room temperature, washing off excess ions in the product, filtering, finally, drying the solid product in a 60-80 DEG C vacuum environment, and crushing and sieving to obtain the product. The performance of the organic bentonite can be greatly improved, and the good-quality organic bentonite for the oil-based drilling fluid is obtained and is favorable for improving the rheological property, the filtration loss resistant performance and the cuttings carrying capacity of the drilling fluid.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, relates to the technical field of organic soil for drilling fluid, in particular to a preparation method of organic bentonite for high-performance oil-based drilling fluid. Background technique [0002] Bentonite is a hydrous clay mineral mainly composed of montmorillonite, molecular formula: Na x (H 2 O) 4 (Al 2-X Mg 0.83 ) Si 4 o 10 )(OH) 2 , due to its special properties, such as: swelling, cohesiveness, adsorption, catalytic, thixotropy, suspension and cation exchange, etc., it is used in various fields. my country's bentonite mineral resources are very rich, and its content is second only to the United States, ranking second in the world. However, its deep processing and utilization are far behind foreign countries. It has been in the initial stage of development and application. In recent years, the research work on the deep processing and utilization of bentonite has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/44C09K8/32
Inventor 董天雷魏士新田先国祝东红
Owner CHINA PETROLEUM & CHEM CORP
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