Hydrophobic membrane structure wall fixing agent as well as preparation method and application thereof
A technology of hydrophobic membrane and wall-fixing agent, applied in the field of petroleum drilling fluid, can solve the problems of limited hydrophobicity and salt-resistance ability of wall-fixing agent, reduce filtration loss, etc., so as to reduce hydration, enhance temperature resistance and performance. excellent effect
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Embodiment 1
[0053] This embodiment prepares a kind of hydrophobic membrane structure wall-fixing agent, comprises the following steps:
[0054] 1) Preparation of hydrophobically modified acrylamide:
[0055] Slowly add 10g of acrylamide and 36g of lauryl acrylate into a beaker containing 120mL of ethylene glycol, stir for 40min at a magnetic stirring speed of 400r / min, and then transfer to a three-necked flask equipped with a stirring and temperature measuring device , put the three-neck flask in a water bath, set the stirring speed to 400r / min, wait for the temperature to rise to 50°C, add 5g of 25wt% ammonium persulfate aqueous solution, raise the temperature to 70°C, and react at constant temperature and speed for 6h. After the reaction is completed Centrifuge, wash the solid with ethanol several times, place it in a vacuum drying oven at 92°C and dry it to constant weight, and grind it into a powder of no less than 150 mesh.
[0056] 2) Preparation of pre-fluid A:
[0057] Slowly ad...
Embodiment 2
[0063] This embodiment prepares a kind of hydrophobic membrane structure wall-fixing agent, comprises the following steps:
[0064] 1) Preparation of hydrophobically modified acrylamide:
[0065] Slowly add 10g of acrylamide and 36g of lauryl acrylate into a beaker containing 120mL of ethylene glycol, stir for 40min at a magnetic stirring speed of 400r / min, and then transfer to a three-necked flask equipped with a stirring and temperature measuring device , put the three-neck flask in a water bath, set the stirring speed to 400r / min, wait for the temperature to rise to 50°C, add 5g of 25wt% ammonium persulfate aqueous solution, raise the temperature to 70°C, and react at constant temperature and speed for 6h. After the reaction is completed Centrifuge, wash the solid with ethanol several times, place it in a vacuum drying oven at 92°C and dry it to constant weight, and grind it into a powder of no less than 150 mesh.
[0066] 2) Preparation of pre-fluid A:
[0067] Slowly ad...
Embodiment 3
[0073] This embodiment prepares a kind of hydrophobic membrane structure wall-fixing agent, comprises the following steps:
[0074] 1) Preparation of hydrophobically modified acrylamide:
[0075] Slowly add 10g of acrylamide and 36g of lauryl acrylate into a beaker containing 120mL of ethylene glycol, stir for 40min at a magnetic stirring speed of 400r / min, and then transfer to a three-necked flask equipped with a stirring and temperature measuring device , put the three-neck flask in a water bath, set the stirring speed to 400r / min, wait for the temperature to rise to 50°C, add 5g of 25wt% ammonium persulfate aqueous solution, raise the temperature to 70°C, and react at constant temperature and speed for 6h. After the reaction is completed Centrifuge, wash the solid with ethanol several times, place it in a vacuum drying oven at 92°C and dry it to constant weight, and grind it into a powder of no less than 150 mesh.
[0076] 2) Preparation of pre-fluid A:
[0077] Slowly ad...
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