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Preparation method of organic bentonite for oil based drilling fluid

A technology of oil-based drilling fluid and sodium-based bentonite, which is applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of poor gelation and viscosity increase and shearing effect, and achieve excellent performance and improved layer quality. Spacing, effect of improving rheology

Inactive Publication Date: 2014-12-17
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 or diesel oil, so the preparation of organic soils for oil-based drilling fluids was studied

Method used

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  • Preparation method of organic bentonite for oil based drilling fluid
  • Preparation method of organic bentonite for oil based drilling fluid

Examples

Experimental program
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Effect test

Embodiment １

[0019] Disperse 50 parts of sodium-based soil 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 dioctadecyldimethylbenzyl Dissolve ammonium chloride in 300 parts of deionized water and stir 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-dried the prepared organic bentonite at 70° C., crush...

Embodiment 2

[0021] Disperse 60 parts of sodium-based soil 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 dioctadecyldimethylbenzyl Dissolve ammonium chloride in 200 parts of ethanol and stir 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 - , filtered, and vacuum-dried the prepared org...

Embodiment 3

[0023] Disperse 65 parts of sodium-based soil 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 dioctadecyldimethylbenzyl Dissolve ammonium chloride in 200 parts of ethanol and stir 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 water - , filtered, and vacuum-dried the prepare...

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Abstract

The invention belongs to the technical field of petrochemical engineering, and relates to a preparation method of organic bentonite for oil based drilling fluid. The method is as folows: 55-75 parts of a sodium bentonite dry material is dissolved in 600-900 parts of deionized water for formation of a suspension system a; 20-35 parts of a quaternary ammonium modifying agent is mixed and dissolved in 100-300 parts of a solvent to form a uniform system b; 10-15 parts of an organic additive is dissolved in 100-150 parts of a solvent to form a uniform system c; the solution b is added into the suspension system a to react for 1-2 hours at 70 to 90 DEG C to form a uniform system d; then the solution c is added into the suspension system d to react for 1-2 hours at 70 to 90 DEG C; a product is cooled to room temperature, excess ions in the product are washed away, the product is filtered, finally, the solid product is dried at 60 to 80 DEG C under the vacuum environment, crushed and sieved to obtain the product. The method can greatly improve the performance of the organic bentonite, and the prepared excellent quality organic bentonite for the drilling fluid is conducive to the improvement of drilling fluid rheology, anti filtration performance and cuttings carrying capacity.

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 high-performance organic bentonite. 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 only been carried out. Organi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/44
Inventor 董天雷祝东红田先国孙远龙
Owner CHINA PETROLEUM & CHEM CORP
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