A kind of inorganic-organic polymer oil well cement retarder, its preparation method and application
A technology of oil well cement and polymer, which is applied in the field of oil well cement retarder and inorganic-organic polymer oil well cement retarder, can solve the problems that the high temperature resistance needs to be further improved, and achieve moderate price, wide applicable temperature range, Intensity has little influence on the effect
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[0025] The invention provides a kind of preparation method of inorganic-organic polymer oil well cement retarder, comprises the following steps:
[0026] 1) providing an aqueous monomer solution, the aqueous monomer solution comprising itaconic acid, 2-acrylamido-2-methylpropanesulfonic acid and water;
[0027] 2) mixing the monomer aqueous solution with the inorganic non-metallic material and the silane coupling agent, and reacting in the presence of the initiator to obtain the inorganic-organic polymer oil well cement retarder.
[0028] One of the objects of the present invention is to provide a preparation method of a high temperature resistant oil well cement retarder, and the obtained retarder has better high temperature resistance, which is beneficial to application.
[0029] The embodiment of the present invention is realized through the following technical scheme. First, an aqueous monomer solution is prepared. The specific steps are as follows: dissolve itaconic acid ...
Embodiment 1
[0043] Add 19.08g of IA and 100g of water into a 500mL four-neck flask equipped with a thermometer, condenser and stirrer, heat up to 45°C and stir for 30min to dissolve completely, then weigh 70.92g of AMPS and dissolve it in 100g of water, transfer to the four-necked flask, and adjust the pH value of the solution to 5 with NaOH; respectively weigh 4g of SiC micropowder (with a particle size of 3-5μm) and 0.2g of coupling agent KH-570 in the above-mentioned flask, and maintain the temperature at 45°C. After stirring for 30 minutes, the temperature was raised to 60°C, 10 g of an aqueous solution containing 0.90 g of initiator potassium persulfate was added into the flask, and the reaction was carried out at constant temperature for 8 hours to obtain 304.1 g of retarder product.
[0044] The obtained product is carried out infrared and thermogravimetric analysis, the result sees figure 1 with figure 2 . figure 1 It is the infrared spectrogram of embodiment 1 gained retarder,...
Embodiment 2
[0046] In a 500mL four-necked flask equipped with a thermometer, condenser, and stirrer, add 6.66g IA and 100g water, raise the temperature to 45°C and stir for 15min to dissolve completely, then weigh 3.72g AA and 49.62g AMPS and dissolve them in 130g water. Transfer it to the flask, adjust the pH value of the solution to 6 with NaOH; weigh 6g of SiN micropowder (3-5μm in particle size) and 0.6g of KH-550 in the above flask, maintain the temperature at 40°C, and stir for 30min Afterwards, the temperature was raised to 65°C, and 10 g of an aqueous solution containing 0.75 g of initiator ammonium persulfate was added into the flask, and reacted at a constant temperature for 6 hours to obtain 306.1 g of retarder product.
[0047] The resulting product contains the characteristic group in the polymer (-COO - 、-SO 3 ) and good thermal stability.
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