Patent ID: 11879088
Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  E | IPC C  E

Claim 11:
12. A method comprising:
mixing at least one additive and a base fluid to form a wellbore fluid such that a viscosity of the wellbore fluid is reducible by a temporary thinning effect of the at least one additive; and introducing the wellbore fluid into a wellbore through an earthen formation, wherein
the base fluid comprising at least one of an oil-based fluid, and
the at least one additive
is a reaction product of a first reactant and a second reactant,
the reaction product comprising at least one cleavable ester bond, the first reactant comprising at least one alcohol, at least one alcohol ethoxylate, or at least one combination thereof, wherein the at least one alcohol is at least one of oleyl alcohol, 2-ethylhexyl alcohol, 2-ethylhexyl cellosolve, 2-ethylhexyl carbitol, hexyl cellosolve, linear alcohol, branched alcohol, Fisher-Tropsch alcohol, or Guerbet alcohol, and wherein the at least one alcohol ethoxylate is at least one of oleyl alcohol having 2 ethoxy units, oleyl alcohol having 3 ethoxy units, benzyl alcohol having 2 ethoxy units, or benzyl alcohol having 4 ethoxy units, and
the second reactant comprising at least one anhydride.