Borehole reinforcement shielding agent and preparation method thereof

[0027] A wellbore reinforced shielding agent, consisting of the following components by weight:

[0028] 40 parts of polyalkyl silicone resin, 10 parts of methyl acrylate, 6 parts of glycidyl epoxy resin, 0.5 part of nano calcium carbonate, 10 parts of hydroxy silicone oil, 0.1 part of dibutyl tin trilaurate stannous octoate, Tween 80 0.5 parts, 80 parts deionized water.

[0029] A method for preparing a wellbore strengthening shielding agent includes the following steps:

[0030] (1) Put polyalkyl silicone resin, methyl acrylate, glycidyl ester type epoxy resin, hydroxy silicone oil and deionized water into the reaction kettle in order according to the direction, stir evenly, add appropriate amount of caustic soda to adjust the pH value in the range of 7-9;

[0031] (2) Add Tween 80, inject nitrogen gas during the period, and stir for 2 hours;

[0032] (3) Add nano calcium carbonate, start the stirring state, stir for 3h, and heat up to 80°C under the stirring state;

[0033] (4) Add d...

[0036] A wellbore reinforced shielding agent, consisting of the following components by weight:

[0037] 68 parts of polyaryl silicone resin, 22 parts of ethyl acrylate, 22 parts of bisphenol A epoxy resin, 1.0 part of nano silica, 18 parts of vinyl silicone oil, 0.5 part of dibutyl tin diacetate, Tween 80 1 Parts, 100 parts deionized water.

[0038] A method for preparing a wellbore strengthening shielding agent includes the following steps:

[0039] (1) Put polyaryl silicone resin, ethyl acrylate, bisphenol A type epoxy resin, vinyl silicone oil and deionized water into the reaction kettle according to the direction, stir evenly, add appropriate amount of caustic soda to adjust the pH value in the range of 7-9 ;

[0040] (2) Add Tween 80, during which nitrogen is introduced, and stirred for 2h;

[0041] (3) Add nano-silica, start the stirring state, stir for 3h, and heat up to 90℃ under the stirring state;

[0042] (4) Add dibutyl tin diacetate and react for 5 hours at 120°C;

[0043]...

[0045] A wellbore reinforced shielding agent, consisting of the following components by weight:

[0046] Epoxy modified silicone resin 20 parts, polyester modified silicone resin 34 parts, 2-methyl methacrylate 16 parts, bisphenol F type epoxy resin 14 parts, nano-magnesium oxide 0.8 parts, amino silicone oil 14 parts , 0.3 parts of tin diethyl dioctanoate, 0.75 parts of Tween 80, and 90 parts of deionized water.

[0047] Another object of the present invention is to provide a method for preparing a wellbore reinforced shielding agent, which includes the following steps:

[0048] (1) Put epoxy-modified silicone resin, polyester-modified silicone resin, 2-methyl methacrylate, bisphenol F epoxy resin, amino silicone oil and deionized water into the reaction kettle in sequence according to the direction, and stir. Evenly, add proper amount of caustic soda to adjust the pH value in the range of 7-9;

[0049] (2) Add emulsifier, during which nitrogen is introduced and stirred for 2h;

[00...