Patent ID: 7348297
Filing Date: 2008-03-25
Classification: B01D

Abstract:
1. Method of controlling foaming or emulsifying in a subterranean formation treatment fluid in a subterranean hydrocarbon-producing formation comprising including in said formation treatment fluid at least 1% by weight of the foaming or emulsifying constituent therein of a compound of the formula H(CH 2 ) z COO—[C 2 H 4 O] x C y H 2y+1 , or of the formula H(CH 2 ) z COO—[C 2 H 4 O] x C 6 H 5 , where z is 0-2, x is an integer from 1 to 5 and y is an integer from 4-9, wherein the foaming or emulsifying constituent comprises an amine oxide.