Temporary plugging agent for drilling fluid
A technology of temporary plugging agent and drilling fluid, which is applied in the fields of oil-soluble resin temporary plugging agent and drilling fluid temporary plugging agent. , On-site use is convenient, the effect of restoring permeability
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[0074] Example 1
[0075] A temporary plugging agent for drilling fluid is a polymer prepared from the following raw materials by weight:
[0076] Hexadecene 60% Sodium Persulfate 0.5%
[0077] Phenol 20%
[0078] 4% formaldehyde solution 18%
[0079] Cetyl trimethyl ammonium chloride 2%.
[0080] The preparation method of the temporary plugging agent for drilling fluid includes the following steps:
[0081] (1) Add phenol and the catalyst sodium persulfate to hexadecene to carry out the alkylation reaction, the reaction temperature is 80±5℃, and the pressure is 2±0.5MPa;
[0082] (2) Add 4% formaldehyde solution to the reactant obtained in step (1) to carry out grafting aldehyde group reaction to generate resin, the reaction temperature is 40±5℃, and the pressure is 2±0.5MPa;
[0083] (3) Add a cationic surfactant to the resin obtained in step (2) to fully emulsify the resin, the reaction temperature is 40±5°C, and the pressure is 2±0.5MPa;
[0084] (4) Dry the polymer obtained in ...
Example Embodiment
[0085] Example 2
[0086] A temporary plugging agent for drilling fluid is a polymer prepared from the following raw materials by weight:
[0087] Hexadecene 65%
[0088] Sodium persulfate 1%
[0089] Phenol 20%
[0090] 4% formaldehyde solution 12%
[0091] Cetyl trimethyl ammonium chloride 2%.
[0092] The preparation method of this embodiment is the same as that of embodiment 1.
Example Embodiment
[0093] Example 3
[0094] A temporary plugging agent for drilling fluid is a polymer prepared from the following raw materials by weight:
[0095] Hexadecene 70%
[0096] Sodium persulfate 1%
[0097] Phenol 15%
[0098] 4% formaldehyde solution 12%
[0099] Cetyl trimethyl ammonium chloride 2%.
[0100] The preparation method of this embodiment is the same as that of embodiment 1.
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