Organic bentonite for white oil-based drilling fluid and preparation method thereof

A technology of white oil-based drilling fluid and bentonite, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as poor high temperature resistance, high product cost, and poor hydrophobicity and lipophilicity

Inactive Publication Date: 2014-09-10
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a white oil-based drilling fluid in order to solve the complex organic bentonite preparation process, high product cost, poor hydrophobicity and lipophilicity, poor high temperature resistance, high system viscosity and low dynamic shear force. Organic bentonite and its preparation method

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  • Organic bentonite for white oil-based drilling fluid and preparation method thereof

Examples

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Effect test

Embodiment 1

[0007] Example 1: Put 30 g of sodium bentonite through a 200-mesh sieve into the reactor, then add 800 mL of deionized water, and stir with an electric mixer for 1 hour at a temperature of 80 ° C to disperse the bentonite in deionized water to form Suspension; then weigh 9g cetyltrimethylammonium chloride, add 40mL deionized water to be mixed with cetyltrimethylammonium chloride solution, the cetyltrimethylammonium chloride solution Add it to the above-mentioned bentonite suspension, and in a water bath at 80°C, ion exchange reaction occurs under stirring conditions for 3 hours to obtain a modified suspension; then weigh 1.8g of sodium dodecylsulfonate, add 40mL Prepare sodium dodecylsulfonate solution with deionized water, add the sodium dodecylsulfonate solution to the above-mentioned primary modified suspension, and react in a water bath at a temperature of 80°C for 1 hour to obtain a secondary Modified suspension; finally put the above secondary modified suspension in a co...

Embodiment 2

[0008] Example 2: Put 20 g of sodium bentonite through a 200-mesh sieve into the reactor, then add 600 mL of deionized water, and stir with an electric mixer for 1 hour at a temperature of 90 ° C to disperse the bentonite in deionized water to form Suspension; Then take by weighing 6g tetradecyl trimethyl ammonium chloride, add 20mL deionized water and be mixed with tetradecyl trimethyl ammonium chloride solution, this tetradecyl trimethyl ammonium chloride solution Add it to the above bentonite suspension, and in a water bath at a temperature of 80°C, an ion exchange reaction occurs under stirring conditions for 2 hours to obtain a primary modified suspension; then weigh 1.2g of sodium lauryl sulfate, add 40mL to remove Ionized water is prepared into a sodium lauryl sulfate solution, and the sodium lauryl sulfate solution is added to the above-mentioned primary modified suspension, and reacted in a water bath at a temperature of 80°C for 2 hours to obtain a secondary modified ...

Embodiment 3

[0009] Example 3: first put 25g of sodium bentonite through a 200-mesh sieve into the reactor, then add 700mL of deionized water, and stir with an electric mixer for 1 hour at a temperature of 70°C to disperse the bentonite in deionized water to form Suspension; Then take by weighing 7.5g octadecyltrimethylammonium chloride, add 30mL deionized water and be mixed with octadecyltrimethylammonium chloride solution, the octadecyltrimethylammonium chloride The solution was added to the above-mentioned bentonite suspension, and the ion exchange reaction occurred under stirring conditions for 1 hour in a water bath at a temperature of 80°C to obtain a primary modified suspension; then weigh 1.5g of sodium dodecylbenzenesulfonate, Add 40mL of deionized water to prepare a sodium dodecylbenzenesulfonate solution, add the sodium dodecylbenzenesulfonate solution to the above-mentioned primary modified suspension, and react in a water bath at a temperature of 80°C for 3 hours. Obtain a sec...

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Abstract

The invention relates to organic bentonite for white oil-based drilling fluid of the petroleum industry, the natural gas industry and the like, and a preparation method of the organic bentonite. The hydrophobicity, the lipophilicity and the high-temperature resistance of the organic bentonite are improved, and the organic bentonite is good in compatibility, high in system viscosity and moderate in dynamic shearing force. According to the technical scheme, the organic bentonite comprises the following raw materials in percentage by mass: 60-80 parts of sodium bentonite as the bentonite, 10-30 parts of m-alkyl trimethyl ammonium halide as quaternary ammonium salt, 2-10 parts of sodium lauryl sulfate, sodium dodecyl sulfate or sodium dodecyl benzene sulfonate as an anionic surfactant. The preparation method comprises the following steps: screening the bentonite, adding water to prepare bentonite suspension, adding a quaternary ammonium salt solution into the bentonite suspension for once modification, further adding an anionic surfactant solution into the suspension for secondary modification, and finally aging, drying, crushing and screening so as to prepare the organic bentonite. The product is simple in production process and convenient to operate, and is used as drilling fluid as the hydrophobicity, the lipophilicity and the high-temperature resistance are all improved.

Description

technical field [0001] The invention relates to an organobentonite for white oil-based drilling fluid used in petroleum, natural gas and other industries for producing drilling fluid and a preparation method thereof. Background technique [0002] Bentonite is a non-metallic mineral with montmorillonite as the main mineral component. It is a 2:1 crystal structure material composed of two silicon-oxygen tetrahedral wafers sandwiching an aluminum-oxygen octahedral wafer. Therefore, it has special swelling properties, adsorption properties and strong cation exchange properties. Organic bentonite is a deep-processed product of bentonite after ion exchange or other treatment. It has good hydrophobicity and lipophilicity, so it is widely used in petrochemical, paint and other industrial fields. [0003] Chinese patent CN1263132A discloses the use of dodecyl-octadecyl quaternary ammonium salt as an organic modifier to prepare organobentonite through extrusion modification on an ext...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/32
CPCC09K8/32
Inventor 张瑞周金位杨磊涂锐陈大钧
Owner SOUTHWEST PETROLEUM UNIV
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