Clean temporary plugging agent and preparation method thereof
A temporary plugging agent and cleaning technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of long dissolution time, poor compression resistance, high solid phase content, etc., and achieve simple use and high insoluble residue rate The effect of low and low dosage
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Embodiment 1
[0030] The purpose of this embodiment is to provide a cleaning temporary plugging agent, the preparation process of which is as follows:
[0031] (1) Dissolve acrylamide in water. In order to speed up the dissolution rate, heat up to 45-50°C. After complete dissolution, cool to room temperature, then add caustic soda and stir to dissolve to obtain intermediate solution 1.
[0032] (2) Heat the solution obtained in step (1) to 35-40°C, slowly add acrylic acid under stirring conditions, and after mixing completely, slowly add initiator ammonium persulfate under stirring conditions, and fully React for 50 minutes, cool to room temperature, then adjust the pH to 1-2 with a small amount of concentrated sulfuric acid, and let stand to obtain intermediate liquid 2.
[0033] (3) Heat the epoxy resin of the low-temperature-resistant glue to above 70°C to melt it completely to obtain the intermediate liquid 3.
[0034] (4) Quickly pour the intermediate liquid 3 into the intermediate li...
Embodiment 2
[0039] The purpose of this embodiment is to provide a cleaning temporary plugging agent, the preparation process of which is as follows:
[0040] (1) Dissolve acrylamide in water. In order to speed up the dissolution rate, heat up to 45-50°C. After complete dissolution, cool to room temperature, then add caustic soda and stir to dissolve to obtain intermediate solution 1.
[0041] (2) Heat the solution obtained in step (1) to 35-40°C, slowly add acrylic acid under stirring conditions, and after mixing completely, slowly add initiator ammonium persulfate under stirring conditions, and fully React for 50 minutes, cool to room temperature, then adjust the pH to 1-2 with a small amount of concentrated sulfuric acid, and let stand to obtain intermediate liquid 2.
[0042] (3) Heat the epoxy resin of the low-temperature-resistant glue to above 70°C to melt it completely to obtain the intermediate liquid 3.
[0043] (4) Quickly pour the intermediate liquid 3 into the intermediate li...
Embodiment 3
[0048] The purpose of this embodiment is to provide a cleaning temporary plugging agent, the preparation process of which is as follows:
[0049] (1) Dissolve acrylamide in water. In order to speed up the dissolution rate, heat up to 45-50°C. After complete dissolution, cool to room temperature, then add caustic soda and stir to dissolve to obtain intermediate solution 1.
[0050] (2) Heat the solution obtained in step (1) to 35-40°C, slowly add acrylic acid under stirring conditions, and after mixing completely, slowly add initiator ammonium persulfate under stirring conditions, and fully React for 50 minutes, cool to room temperature, then adjust the pH to 1-2 with a small amount of concentrated sulfuric acid, and let stand to obtain intermediate liquid 2.
[0051] (3) Heat the epoxy resin of the low-temperature-resistant glue to above 70°C to melt it completely to obtain the intermediate liquid 3.
[0052] (4) Quickly pour the intermediate liquid 3 into the intermediate li...
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