Method for inhibiting hydrate formation

Details Method for inhibiting hydrate formation Method for inhibiting hydrate formation

C - Chemistry, Metallurgy

07

C

C07C 7/20 (2006.01) C08F 226/02 (2006.01) C08F 226/06 (2006.01) C09K 8/52 (2006.01) C10G 33/04 (2006.01) C10L 3/06 (2006.01) C10L 3/10 (2006.01) E21B 37/06 (2006.01) F17D 1/05 (2006.01)

Patent

CA 2178367

A method for inhibiting the formation of clathrate hydrates in a fluid having hydrate-forming constituents is disclosed. More specifically, the method can be used in treating a petroleum fluid stream such as natural gas conveyed in a pipe to inhibit the formation of a hydrate restriction in the pipe. The hydrate inhibitor used for practicing the method is selected from the family of substantially water solublecopolymers formed from N-methyl-N-vinylacetamide (VIMA) and one of three comonomers, vinylpyrrolidone (VP), vinylpiperidone (VPip), or vinylcaprolactam (VCap). VIMA/VCap is the preferred copolymer. These copolymers may be used alone or in combination with each other or other hydrate inhibitors. Preferably, a solvent, such as water, brine, alcohol, or mixtures thereof, is used to produce an inhibitor solution or mixture to facilitate treatment of the petroleum fluid stream.

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