Process to reduce the tendency to agglomerate of hydrates in production effluents containing paraffinic oils

摘要

The method for inhibiting or slowing the formation, the growth and/or agglomeration of hydrates in a fluid containing water, a gas and a paraffin oil is claimed. It consists of incorporating a sequenced polyisobutene-polyethylene glycol copolymer and an alkyl(meth)acrylate-nitrogenated monomer copolymer in the fluid. The sequenced polyisobutene-polyethylene glycol copolymer contains sequenced anhydride polyisobutenyl-succinic derivatives and sequenced polyethylene glycol or monoalkylether of polyethylene glycol. The sequenced polyisobutene-polyethylene glycol copolymer derives from an anhydride polyisobutenyl-succinic derivative with mean molecular mass of 500-5000 and a polyethylene glycol or monoalkylether of polyethylene glycol of mean molecular mass of 100-1000. The alkyl(meth)acrylate-nitrogenated monomer copolymer has formula (A)n(B)m of mean molecular mass 10000-100000, where A is -(-CH2C(R1)(COOR2)-, where R1 is a hydrogen atom or a methyl radical and R2 is an alkyl radical with at least 10 carbon atoms and R3 is a group containing nitrogen, and is chosen from acrylates or alkyl methacrylates with 18, 20, 22, 24 carbon atoms, and B is -(-CH2C(R1)(R3)-, where R1 is as above and R3 is a group containing nitrogen, and is chosen from N-vinyl-pyrrolidinone, vinyl-pyridines, N-vinyl-imidazole, etc..