Temperature-resistant and salt-resistant filtrate reducer for drilling fluid, and preparation method thereof
A technology of fluid loss reducer and drilling fluid, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of poor temperature resistance and difficulty in application, and achieve enhanced rigidity, good salt resistance, and improved thermal stability sexual effect
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[0030] Example 1:
[0031] The temperature-resistant and salt-resistant fluid loss reducer for drilling fluids of this embodiment includes: in parts by weight, 20 parts of modified rice husk powder, 20 parts of modified bagasse, 20 parts of modified sulfonated lignite resin, and 10 parts of acrylamide. Parts, 10 parts of acrylic acid, 10 parts of 2-acrylamido-2-methylpropanesulfonic acid, 10 parts of maleic anhydride, 5 parts of N-vinylpyrrolidone and 10 parts of dimethyldiallylammonium chloride.
[0032] Among them, the preparation steps of the modified rice husk powder include: adding rice husk to the culture solution, adding disodium hydrogen phosphate-citric acid buffer to the culture solution, adjusting the pH to 3 and adding white rot fungi at a temperature of 30°C React for 36h, take out, dry and pulverize to a particle size of 50 meshes to obtain modified rice husk powder; wherein the mass ratio of rice husk, culture solution and white rot fungus is 1:10:3; disodium hydroge...
Example Embodiment
[0045] Example 2:
[0046] The temperature- and salt-resistant fluid loss reducer for drilling fluids of this embodiment includes: in parts by weight, 30 parts of modified rice husk powder, 30 parts of modified bagasse, 30 parts of modified sulfonated lignite resin, and 20 parts of acrylamide. Parts, 20 parts of acrylic acid, 15 parts of 2-acrylamido-2-methylpropanesulfonic acid, 15 parts of maleic anhydride, 10 parts of N-vinylpyrrolidone and 10 parts of dimethyldiallylammonium chloride.
[0047] Among them, the preparation steps of modified rice husk powder, modified bagasse and modified sulfonated lignite resin are the same as in Example 1.
[0048] The preparation method of the temperature-resistant and salt-resistant fluid loss reducer for drilling fluids of this embodiment is the same as the preparation method of the temperature-resistant and salt-resistant fluid loss reducers for drilling fluids of Example 1.
Example Embodiment
[0049] Example 3:
[0050] The temperature- and salt-resistant fluid loss control agent for drilling fluids of this embodiment includes: parts by weight, parts by weight, 35 parts of modified rice husk powder, 35 parts of modified bagasse, and 40 parts of modified sulfonated lignite resin Parts, 25 parts of acrylamide, 25 parts of acrylic acid, 20 parts of 2-acrylamido-2-methylpropanesulfonic acid, 17 parts of maleic anhydride, 15 parts of N-vinylpyrrolidone and dimethyldiallyl chlorination 12 parts of ammonium. .
[0051] Among them, the preparation steps of the modified rice husk powder include: adding rice husk to the culture solution, adding disodium hydrogen phosphate-citric acid buffer to the culture solution, adjusting the pH to 3 and adding white rot fungi at a temperature of 32°C React for 45h, take out, dry and pulverize to a particle size of 50 meshes to obtain modified rice husk powder; wherein the mass ratio of rice husk, culture solution and white rot fungus is 1:11...
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