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Production method of novel organic rectorite for oil-based drilling fluid

A technology of oil-based drilling fluid and production method, applied in the direction of chemical instruments and methods, drilling composition, etc., can solve the problems of increased drill pipe torque, affecting product performance, and increased fluid loss, etc., reaching a strong market Competitiveness, low material cost, high competitiveness effect

Active Publication Date: 2016-05-11
WUHAN HUAKUANG COLLOID CHEM CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0006] Second, the technology disclosed in patent 201010258856.0 does not heat during the organicization process, and only relies on the heat generated by rolling friction to maintain the cation exchange reaction, and the organicization effect is not good
[0007] Third, the technology disclosed in the patent 201010258856.0 allows the Ca of the final product of the organic reaction ++ Ions, Mg ++ Ions, Cl - Impurities such as ions remain in the product, and the final product is not washed, which affects product performance
On the one hand, due to the effect of these hetero ions, the high temperature stability of the oil system becomes poor, the viscosity of the drilling fluid system tends to thicken after high temperature aging, the torque of the drill pipe increases, and the fluid loss increases
On the other hand, residual hetero ions are impurities, which lead to a decrease in the effective content of organic soil. In order to achieve the same effect, the amount of lipophilic colloids in the whole oil system or water-in-oil system has to be increased.

Method used

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  • Production method of novel organic rectorite for oil-based drilling fluid

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Experimental program
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Effect test

Embodiment 1

[0026]In the reaction vessel, add 100 parts of calcium-based rectorite powder (100 mesh) with a purity of 66% and a water content of 6%, add a mixed solution of 2 parts of sodium carbonate, 1.5 parts of lithium carbonate, and 200 parts of water, and then add 200 parts of Industrial water, heated and stirred at a speed of 120rpm, the temperature was raised to 90°C. Keep stirring for 45 minutes, take 20 parts of cetyltrimethylammonium chloride with a net content of 75% (the rest is mainly water), add it to the container, keep the temperature of the container at 90°C, continue to stir at a speed of 120rpm, and organically React for 90 minutes. Add 200 parts of industrial water at room temperature and stir for 2 minutes to adjust the dilution ratio of the slurry. Subsequently, the slurry is introduced into a vacuum filter for suction filtration, the filter cake is taken out, placed in a cool place for 24 hours, and dried to a water content of 3%. Pulverized to 200 mesh (0.074mm)...

Embodiment 2

[0030] In a sealable reaction vessel, add 100 parts of calcium-based rectorite powder with a purity of 73% and a water content of 6.5%, a mixed solution of 3 parts of sodium carbonate, 2 parts of lithium oxalate, and 200 parts of water, and then add 300 parts of industrial With water, heat and stir at 120 rpm, raise the temperature to 80°C. Keep stirring for 45 minutes, take 28.5 parts of octadecyldimethylbenzyl ammonium chloride with a net content of 75% (the rest is mainly water), add it to the container, keep the temperature of the container at 115 °C and build up the pressure in the closed container, Continue to stir at a speed of 120rpm and keep warm for 60 minutes. Subsequently, the slurry is introduced into a vacuum filter for suction filtration. When about 80% of the filtrate is discharged and the concentration of the remaining slurry in the suction filter funnel increases significantly, add 400 parts of industrial water, and then filter again to dry the water. Take o...

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Abstract

Disclosed is a production method of novel organic rectorite for oil-based drilling fluid. The organic rectorite comprises rectorite and quaternary ammonium salt as main components. The production method includes the steps of A, sodium-modification / lithiation pretreatment; B, organic modification reaction; C, filtering and washing; and D, ageing, drying and grinding. The production method has the advantages that since calcium-based rectorite raw material is subjected to the sodium-modification / lithiation pretreatment according to the sodium salt and lithium salt compound modification technology, colloid rheological property of the organic rectorite product is improved; chemical reaction of organic-modification cation exchange is promoted completely by a controllable high-temperature organic modification process, and thus quality of the organic rectorite is much stable; residual dissoluble ion of products from the organic modification cation exchange reaction is removed by a washing and filtering process, so that high-temperature stability of the products is improved further while content of impurity thereof is reduced.

Description

technical field [0001] The invention relates to a production technology of colloidal materials used in drilling fluids in industries such as petroleum, natural gas, geological mines, and construction engineering, and belongs to the field of drilling compositions. Specifically, it relates to a production method of organic clay for oil-based drilling fluid. Background technique [0002] Oil-based drilling fluid has the advantages of high temperature resistance, salt resistance, wellbore stability, good lubrication and less damage to oil and gas layers. It is the mainstream drilling fluid in the world, and most foreign drilling projects use oil-based drilling fluid. China also recognizes the advantages of oil-based drilling fluids, and is gradually increasing the proportion of oil-based drilling fluids used in combination with the formation conditions of drilling projects. [0003] Organoclay is an indispensable lipophilic colloidal material for oil-based drilling fluids. As ...

Claims

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Application Information

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IPC IPC(8): C09K8/035C09K8/32
CPCC09K8/035C09K8/32
Inventor 汪昌秀梅宏
Owner WUHAN HUAKUANG COLLOID CHEM CO LTD
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