A kind of instant salt-resistant high-viscosity drag-reducing agent and preparation method thereof
A drag-reducing agent, instant technology, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as emissions, and achieve the effects of reducing usage, improving viscosity-increasing properties, and reducing costs
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Embodiment 1
[0027] An instant salt-resistant drag-reducing agent prepared by a method comprising the following steps:
[0028] S1. Add 20 parts by weight of oil phase and 2 parts by weight of emulsifier into a reactor with a stirring device, and stir and mix at 600r / min; add 30 parts by weight of acrylamide, 3 parts by weight of salt-tolerant monomer, 2.4 parts by weight of emulsifying aid and 1 part by weight of chelating agent are dissolved in water to obtain solution A;
[0029] S2. The reactor is fed with nitrogen at a constant temperature of 20°C, and solution A is added dropwise to the reactor at a rate of 10 mL / min;
[0030] S3. After the reactor is stirred and mixed for 30 minutes, add 0.9 parts by weight of an initiator to the reactor, and react at a constant temperature of 20° C. for 5 hours;
[0031] S4, adding 7 parts by weight of polymethacryloyloxyethyltrimethylammonium chloride into the reactor, and reacting for 1 hour to obtain a finished product;
[0032] Wherein, the o...
Embodiment 2
[0034] An instant salt-resistant drag-reducing agent prepared by a method comprising the following steps:
[0035] S1. Add 25 parts by weight of oil phase and 2.5 parts by weight of emulsifier into a reactor with a stirring device, and stir and mix at 700r / min; add 35 parts by weight of acrylamide, 2 parts by weight of salt-tolerant monomer, 2.6 parts by weight of emulsifying aid and 1.2 parts by weight of chelating agent are dissolved in water to obtain solution A;
[0036] S2. Nitrogen gas was passed into the reactor at a constant temperature of 20°C, and solution A was added dropwise to the reactor at a rate of 5 mL / min;
[0037] S3. After the reactor is stirred and mixed for 30 minutes, add 0.5 parts by weight of an initiator to the reactor, and react at a constant temperature of 20° C. for 5 hours;
[0038] S4, then add 6 parts by weight of polymethacryloyloxyethyltrimethylammonium chloride into the reactor, and react for 1 hour to obtain the finished product;
[0039] ...
Embodiment 3
[0041] An instant salt-resistant drag-reducing agent prepared by a method comprising the following steps:
[0042] S1. Add 18 parts by weight of oil phase and 1.8 parts by weight of emulsifier into a reactor with a stirring device, and stir and mix at 650r / min; add 38 parts by weight of acrylamide, 3.2 parts by weight of salt-tolerant monomer, The emulsifying aid of 2 weight parts, the chelating agent of 1.4 weight parts are dissolved in water, obtain solution A;
[0043] S2. Nitrogen gas was passed into the reactor at a constant temperature of 20°C, and solution A was added dropwise to the reactor at a rate of 15 mL / min;
[0044] S3. After the reactor is stirred and mixed for 30 minutes, add 0.6 parts by weight of initiator to the reactor, and react at a constant temperature of 20° C. for 5 hours;
[0045] S4, then add 8 parts by weight of polymethacryloyloxyethyltrimethylammonium chloride into the reactor, and react for 1 hour to obtain the finished product;
[0046] Where...
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