Acryloyl-based copolymers, terpolymers, and use as hydrate inhibitors

A method for inhibiting formation of clathrate hydrates in a fluid capable of forming the clathrate hydrates, the method comprising:

• contacting the fluid with at least one copolymer of General Formula (I) under conditions suitable for forming the clathrate hydrates:
• in which:
• R1 and R3 are each independently chosen from divalent C4-C7 aliphatic groups and divalent C4-C7 heteroaliphatic groups, optionally substituted with one or more C1-C6 aliphatic groups, heteroatoms independently chosen from O, N, and S, or combination thereof, where:
• the divalent C4-C7 heteroaliphatic groups of R1 and R3 comprise one or two heteroatoms independently chosen from O, N, and S, and
• the maximum number of heteroatoms in R1 or R3 is two;
• R2 is chosen from Q1 and Q2:
• in which:
• R4 and R5 are each independently chosen from divalent C4-C7 aliphatic groups and divalent C4-C7 heteroaliphatic groups, optionally substituted with one or more C1-C6 aliphatic groups, heteroatoms independently chosen from O, N, and S, or combination thereof, where:
• the divalent C4-C7 heteroaliphatic groups of R4 and R5 comprise one or two heteroatoms independently chosen from O, N, and S, and
• the maximum number of heteroatoms in R4 or R5 is two;
• x is a molar fraction range chosen from 0.1 to 0.9;
• y is a molar fraction range chosen from 0.1 to 0.9;
• and
• z is a molar fraction range chosen from 0 to 0.8, where the summation of x, y, and z equals 1.