Lignin-derived environmentally-friendly viscosity reducer for drilling fluid, and preparation method thereof
A lignin and drilling fluid technology, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as increased soaking expansion and collapse, decreased drilling fluid density, and increased fluid loss
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Embodiment 1
[0016] In the first step, the lignin material is mixed with 2 times the quality of water in a reaction vessel at normal temperature, and stirred evenly, the lignin material is industrial-grade sodium lignosulfonate, and the water is industrial-grade pure water;
[0017] In the second step, adding a metal salt having a mass ratio of 1:2 to the lignin material in the reaction vessel, stirring evenly, the metal salt is industrial-grade ferric chloride;
[0018] The third step is to add 5% foam inhibitor of lignin material mass to the above mixed solution in the reaction vessel, then add 3% lignin material mass % formaldehyde therein, stir evenly, and stir for 1 hour at 80° C. The cetylpyridinium chloride of technical grade that said foam suppressor is, and described formaldehyde is the aqueous formaldehyde solution of technical grade;
[0019] In the fourth step, the solvent of the above mixture is evaporated, and the mixture is crushed to below 40 meshes to obtain the lignin-der...
Embodiment 2
[0023] In the first step, the lignin material is mixed with 3 times the quality water in a reaction vessel at normal temperature, and stirred evenly, the lignin material is industrial-grade calcium lignosulfonate, and the water is deionized water;
[0024] In the second step, adding a metal salt having a mass ratio of 1:3 to the lignin material in the reaction vessel, stirring evenly, the metal salt is chemically pure ferric sulfate;
[0025] In the third step, add 3% foam inhibitor of lignin material mass to the above mixed solution in the reaction vessel, then add formaldehyde with 2% lignin material mass, stir evenly, and stir for 2 hours at 60° C. Said foam inhibitor is analytically pure dodecyltrimethylammonium chloride, and said formaldehyde is chemically pure formaldehyde solution;
[0026] In the fourth step, the solvent of the above mixture is evaporated, and the mixture is crushed to below 40 meshes to obtain the lignin-derived environmental-friendly viscosity reduce...
Embodiment 3
[0030]In the first step, the lignin material is mixed with 5 times the quality of water in a reaction vessel at normal temperature, and stirred evenly, the lignin material is chemical soda ash lignin, and the water is industrial grade mineral water;
[0031] In the second step, adding a metal salt with a mass ratio of 1:5 to the lignin material in the above-mentioned reaction vessel, stirring evenly, the metal salt is chemically pure ferrous chloride;
[0032] The third step is to add a foam inhibitor of 2% of the mass of lignin material to the above mixed solution in the reaction vessel, and then add formaldehyde of 1% of the mass of lignin material to it, stir evenly, and stir for 4 hours at 65°C. Said foam inhibitor is analytically pure cetyltrimethylammonium chloride, and said formaldehyde is analytically pure trioxane;
[0033] In the fourth step, the solvent of the above mixture is evaporated, and the mixture is crushed to below 40 meshes to obtain the lignin-derived env...
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Abstract
Description
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Application Information

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