Drilling fluid and preparation method thereof
A drilling fluid and particle technology, used in chemical instruments and methods, drilling compositions, etc., can solve the problems of stable dispersion, difficult stable dispersion, and difficult asphalt particles.
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Embodiment 1
[0026] The oxidized asphalt with a softening point of 154.0°C accounts for 35% of the base asphalt, and the deasphalt with a softening point of 155.2°C accounts for 65% of the base asphalt, and graphite accounts for 16% of the total material and bentonite accounts for 4% of the total material. , put it into a high-speed pulverizer, mix for 5 seconds, put it in a freezer at a freezing temperature of -25°C, freeze for 8 hours, grind for 25 seconds, add water-soluble acrylic resin accounting for 1.2% of the total amount of materials, and mix for 4 seconds to obtain high softening Point bituminous composition particles with an average particle size of 80 μm.
[0027]According to 2% of the total mass of the drilling fluid, the high softening point asphalt composition particles were placed in 400ml of the prepared drilling fluid base slurry (the base slurry mainly consists of: adding 2.75g of anhydrous sodium carbonate per 1000mL of water, and then adding 60g of calcium bentonite, S...
Embodiment 2
[0032] The oxidized asphalt with a softening point of 168.4°C accounts for 55% of the base asphalt, and the dissolved asphalt with a softening point of 165.9°C accounts for 45% of the base asphalt, and graphite accounts for 12% of the total material and Mongolian material accounts for 6%. Remove the soil, add it to a high-speed pulverizer, mix for 5 seconds, put it in a freezer at a freezing temperature of -30°C, freeze for 6 hours, and pulverize for 20 seconds, add polyvinylpyrrolidone accounting for 1.0% of the total material, and mix for 5 seconds to obtain a high The softening point bituminous composition particles have an average particle size of 62 μm.
[0033] According to 3% of the total mass of drilling fluid, put high softening point asphalt composition particles into 400ml of prepared drilling fluid base slurry, add sulfonated phenolic resin accounting for 16% of asphalt mass, shear at high speed for 15 minutes, and then add Sodium lauryl sulfate with a liquid mass ...
Embodiment 3
[0038] The oxidized asphalt with a softening point of 181.6°C accounts for 70% of the base asphalt, and the dissolved asphalt with a softening point of 180.2°C accounts for 30% of the base asphalt, and graphite accounts for 12% of the total material, and Mongolian material accounts for 4%. Desoiling and bentonite, which accounts for 4% of the total material, are added to a small high-speed pulverizer, mixed for 5s, placed in a freezer at a freezing temperature of -20°C, frozen for 9 hours, crushed for 30s, and 1.5% of the total material is added. Alkyd resin was mixed for another 5 seconds to obtain high softening point asphalt composition particles with an average particle size of 106 μm.
[0039] By 2.5% of the total mass of the drilling fluid, the high softening point asphalt composition particles are placed in 400ml of the prepared drilling fluid base slurry, add sulfonated phenolic resin accounting for 16% of the asphalt composition particle quality, shear at high speed fo...
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