5Gregoli A A. Low - temperature pipeline emulsion transportation enhancement [ P] . U. S. Patent, No. 5156652, Oct , 20,1992.
6Jamaluddln AKM, et al. Controlling sand production during down hole emulsification[J] .JCPT,34(7), 1995:22 - 28.
7Gifford G, Mc Clafin, et al.The replacement of hydrocarbon diluent with surfactant and water for the production of heavy,viscous crude oil[ J]. JPT, October, 1982.