A kind of hydrate kinetic inhibitor and its application
A kinetic inhibitor and hydrate technology, which is applied in drilling compositions, chemical instruments and methods, etc., can solve the problems such as large influence of water content, large influence of supercooling, and low inhibitory activity on polymerization inhibition performance. Hydrate blockage, high degree of supercooling, and the effect of prolonging the formation time
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Embodiment 1
[0054] This example provides a novel hydrate kinetic inhibitor, which is obtained by mixing polyvinylcaprolactam, 4-acetylpyridine and ethanol at a mass ratio of 1:1:2.
[0055] In this example, the above-mentioned high-pressure fully transparent sapphire reactor is used for evaluation, and 15ml of deionized water is prepared, and the above-mentioned new hydrate kinetic inhibitor of 0.5% of the system water quality is added, the experimental pressure is 5.0MPa, and the experimental temperature is 277.2K , through the sapphire reactor, it was found that the time to inhibit hydrate nucleation was 987min, and the time to inhibit hydrate growth was 1440min.
Embodiment 2
[0057] This example provides a new type of hydrate kinetic inhibitor, which is obtained by mixing Inhibex 501, 4-acetylpyridine and ethylene glycol at a mass ratio of 1:1:2.
[0058] In this example, the above-mentioned high-pressure fully transparent sapphire reactor is used for evaluation, and 15ml of deionized water is prepared, and the above-mentioned new hydrate kinetic inhibitor of 0.5% of the system water quality is added, the experimental pressure is 5.0MPa, and the experimental temperature is 277.2K , through the sapphire reactor, it was found that the time to inhibit the nucleation of hydrate was 987min, and the time to inhibit the growth of hydrate was more than 1440min.
Embodiment 3
[0060] This example provides a novel hydrate kinetic inhibitor, which is obtained by mixing VC-713, 5-acetyl-2-picoline and diethylene glycol monobutyl ether in a mass ratio of 2:1:1.
[0061] In this example, the above-mentioned high-pressure fully transparent sapphire reactor is used for evaluation, and 15ml of deionized water is prepared, and the above-mentioned new hydrate kinetic inhibitor of 1.0% of the system water quality is added, the experimental pressure is 5.0MPa, and the experimental temperature is 277.2K , found through the sapphire reactor, the time to inhibit hydrate nucleation is 1209min, and the time to inhibit hydrate growth is more than 1440min.
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