Methods and compositions for use in oil and/or gas wells
First Claim
Patent Images
1. A method of preventing, reducing, or eliminating a crude oil emulsion in an oil and/or gas well having a wellbore, comprising:
- injecting a solution comprising an emulsion or a microemulsion into the wellbore of an oil and/or gas well,wherein the crude oil emulsion is prevented, reduced, or eliminated following injection of the solution; and
wherein the emulsion or the microemulsion comprises a surfactant, a first solvent, and a silicone solvent, wherein the silicone solvent is a volatile linear or cyclic siloxane having the chemical formula (CH3)3SiO—
((CH3)2SiO)n—
Si(CH3)3 or cyclic [(CH3)2SiO]m, wherein n is 0 to 5 and m is 4 or 5, wherein the silicone solvent has a molecular weight less than about 800 g/mol, wherein the surfactant comprises a nonionic, an anionic, or a cationic surfactant, wherein the cationic surfactant comprises a quaternary ammonium salt.
2 Assignments
0 Petitions
Accused Products
Abstract
Methods and compositions comprising an emulsion or a microemulsion for use in various aspects of the life cycle of an oil and/or gas well are provided. In some embodiments, the emulsion or the microemulsion comprises water, a solvent, and a surfactant, and optionally, one or more additives. In some embodiments, methods for preventing, reducing, or eliminating a crude oil emulsion in an oil and/or gas well are provided.
-
Citations
30 Claims
-
1. A method of preventing, reducing, or eliminating a crude oil emulsion in an oil and/or gas well having a wellbore, comprising:
-
injecting a solution comprising an emulsion or a microemulsion into the wellbore of an oil and/or gas well, wherein the crude oil emulsion is prevented, reduced, or eliminated following injection of the solution; and wherein the emulsion or the microemulsion comprises a surfactant, a first solvent, and a silicone solvent, wherein the silicone solvent is a volatile linear or cyclic siloxane having the chemical formula (CH3)3SiO—
((CH3)2SiO)n—
Si(CH3)3 or cyclic [(CH3)2SiO]m, wherein n is 0 to 5 and m is 4 or 5, wherein the silicone solvent has a molecular weight less than about 800 g/mol, wherein the surfactant comprises a nonionic, an anionic, or a cationic surfactant, wherein the cationic surfactant comprises a quaternary ammonium salt. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
-
Specification