Method for preparing solid dosage form from viscous salt-resistant fluid loss agent solution, solid dosage form fluid loss agent and application of solid dosage form fluid loss agent
A technology of fluid loss reducer and solid dosage form, applied in chemical instruments and methods, drilling compositions, etc., can solve the problem of inconvenient storage and transportation of liquid fluid loss reducer, high viscosity of liquid fluid loss reducer, and performance of cement slurry. Instability and other problems, to achieve good salt resistance, reduce filtration loss, and facilitate transportation and storage.
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[0054] Wherein, the preparation method of the viscous anti-salt fluid loss reducing agent may comprise the following steps:
[0055] The preparation method of the viscous anti-salt fluid loss reducing agent refers to the preparation method of Example 1 in Chinese Patent CN 108929405 A, which may include the following steps: weighing 40 parts by weight of 2-acrylamido-2-methylpropanesulfonate acid (AMPS), 30 parts by weight N,N'-dimethylacrylamide (DMAA), 1 part by weight acrylic acid (AA), 1 part by weight 3-allyloxy-2-hydroxy-1-propanesulfonic acid (AHPS), 1 part by weight of acrylonitrile (AN), dissolved in 100 parts by weight of deionized water. The pH value was adjusted to 7 by adding a 40% sodium hydroxide solution. Add the solution into the reactor, put the reactor in a constant temperature water bath at 60°C for 1 to 1.5 hours; feed nitrogen into the reactor to remove oxygen, and when the temperature of the aqueous solution in the reactor reaches 60°C, add 0.1 parts by...
Embodiment 1
[0057] The method for making the viscous anti-salt dehydration agent solution into a solid dosage form comprises the following steps:
[0058] Step 1. Measure 500 g of the viscous anti-salt dehydration agent 1# solution with an effective concentration of 40 wt%, place it in a beaker with a capacity of 1 L, and place it in a constant temperature water bath with a temperature of 85°C.
[0059] Step 2, taking 300g of anhydrous sodium acetate and mixing it with the fluid loss reducer solution heated to a specified temperature to form a uniform mixed solution;
[0060] Step 3. Stir the mixed solution at 85°C for 3 hours to fully disperse and dissolve anhydrous sodium acetate in the fluid loss reducer solution;
[0061] Step 4: Pour the uniformly stirred mixed solution on the plastic cloth prepared in advance, and let it cool naturally in the air, fully and quickly, and after 20 minutes, the mixed solution is basically cooled to obtain a polymer product in solid dosage form.
[006...
Embodiment 2
[0064] The method for making the viscous anti-salt dehydration agent solution into a solid dosage form comprises the following steps:
[0065] Step 1. Measure 1000g of a commercially available liquid fluid loss reducer product (a polymer fluid loss reducer with AMPS and AA as the main monomers, with an apparent viscosity of 530mPa·s and a solid phase content of 35%), and place it in In a beaker with a capacity of 2L, place it in a constant temperature water bath at a temperature of 90°C.
[0066] Step 2, taking 400g of anhydrous sodium carbonate and mixing it with the fluid loss reducer solution heated to a specified temperature to form a uniform mixed solution;
[0067] Step 3. Stir the mixed solution at 90°C for 2 hours to fully disperse and dissolve the anhydrous sodium carbonate in the fluid loss reducer solution;
[0068] Step 4: Pour the uniformly stirred mixed liquid onto the plastic cloth prepared in advance, and fully and rapidly cool it in the air. After 20 minutes,...
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