Additive composition for water-based drilling fluid containing supramolecular material, water-based drilling fluid and application thereof
A technology for water-based drilling fluid and composition, which is applied in the field of water-based drilling fluid and additive composition for water-based drilling fluid, can solve the problems of reducing shear force, suspension of drilling fluid, and reduced carrying capacity, and achieves low viscosity, good High temperature and high salt resistance, high shear effect
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preparation example Construction
[0031] According to the present invention, preferably, the preparation method of the supramolecular material comprises:
[0032] (1) in an aqueous solvent, and under alkaline conditions, the calcium source, the carbon source and the silicon source are mixed;
[0033] (2) Aging the resulting mixture, followed by solid-liquid separation, and drying the resulting solid phase;
[0034] Wherein, the calcium source is calcium oxide and / or calcium hydroxide, the carbon source is one or more of graphite, graphene, graphite oxide and graphene oxide, and the silicon source is silicon dioxide;
[0035] The aging conditions include: the temperature is above 100°C, and the time is above 10h.
[0036]According to the present invention, the amount of the calcium source, carbon source and silicon source can be properly adjusted according to the composition of the desired supramolecular material, preferably, the calcium source in terms of CaO, the carbon source in terms of C and the SiO 2 T...
preparation example 1
[0121] This preparation example is used to illustrate the supramolecular material and its preparation method of the present invention.
[0122] (1) Add calcium oxide powder, graphite powder and silicon dioxide powder (the molar ratio of calcium oxide, graphite and silicon dioxide is 1:0.75:1.6, the total amount is 100mmol) into 200mL of water, and then pass through sodium hydroxide Adjust the pH of the system to 10 with sodium bicarbonate buffer solution, and stir and mix at 800rpm for 30min;
[0123] (2) Transfer the mixture into an airtight reaction vessel, and leave it to age at 180°C for 24 hours, then centrifuge, wash the obtained solid phase with water, and dry it at 60°C for 1 hour until it is dried, and grind to obtain the supramolecular material A1 , among them, CaO, C, SiO 2 The molar ratio to bound water is 1:0.75:1.6:0.1.
[0124] The supramolecular material of gained is dispersed in water, through TEM observation (see figure 1 As shown), the supramolecular mate...
preparation example 2
[0126] This preparation example is used to illustrate the supramolecular material and its preparation method of the present invention.
[0127] (1) Add calcium oxide powder, graphite powder and silicon dioxide powder (the molar ratio of calcium oxide, graphite and silicon dioxide is 1:0.65:1.3, the total amount is 200mmol) into 200mL of water, and then pass through sodium hydroxide Adjust the pH of the system to 9.5 with sodium bicarbonate buffer solution, and stir and mix at 650rpm for 40min;
[0128] (2) Transfer the mixture into an airtight reaction vessel, and leave it to age at 170°C for 20 hours, then centrifuge, wash the obtained solid phase with water, and dry it at 60°C for 1 hour until it is dried, and grind to obtain the supramolecular material A2 , among them, CaO, C, SiO 2 The molar ratio to bound water is 1:0.65:1.3:0.2.
[0129] The obtained supramolecular material is dispersed in water, and observed by TEM, the supramolecular material forms a three-dimensiona...
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