Back to results
US 10,240,083 B2Granted
Thickening of fluids
AssigneeSchlumberger Technology Corporation
InventorsGary John Tustin, Valerie Lafitte, Bruno Drochon
Life of this patent
Estimating the term…
Abstract
An aqueous fluid, possibly a wellbore fracturing fluid, comprises an aqueous solution or dispersion of a first polymer, which may be polysaccharide, as a thickener and a cross linking agent to enhance the viscosity of the fluid by crosslinking the first polymer, wherein the crosslinking agent is a second polymer comprising at least one polymer chain with phenyl boronate groups distributed along the polymer chain and the phenyl boronic acid groups have nitrogen attached to the phenyl group at a position which is meta relative to the boronate group.
Claims21
A wellbore treatment fluid comprising:
- an aqueous solution or dispersion of a first polymer to thicken the fluid;
- a cross-linking agent to increase viscosity of the fluid by cross-linking the first polymer, wherein the cross-linking agent is a second polymer comprising at least one polymer chain with phenyl boronate groups distributed along the polymer chain, and wherein each phenyl boronate group comprises a phenyl group and a boronate group and has a nitrogen atom attached to the phenyl group at a position which is meta relative to the boronate group;
- and
- a viscosity breaker to reduce viscosity of the fluid after a period of time.
1 more element
A method of treatment of a wellbore or a formation penetrated by a wellbore, the method comprising:
- pumping into the wellbore a fluid comprising:
- an aqueous solution or dispersion of a first polymer;
- and
- a cross-linking agent to increase viscosity of the fluid by cross-linking the first polymer, wherein the cross-linking agent is a second polymer comprising at least one polymer chain with phenyl boronate groups distributed along the polymer chain, and wherein each phenyl boronate group comprises a phenyl group and a boronate group and has a nitrogen atom attached to the phenyl group at a position which is meta relative to the boronate group.
1 more element
A wellbore treatment fluid comprising:
- an aqueous solution or dispersion of a first polymer to thicken the fluid;
- and
- a cross-linking agent to increase viscosity of the fluid by cross-linking the first polymer, wherein the cross-linking agent is a second polymer comprising at least one polymer chain with phenyl boronate groups distributed along the polymer chain, and wherein each phenyl boronate group comprises a phenyl group and a boronate group and has a nitrogen atom attached to the phenyl group at a position which is meta relative to the boronate group;
- wherein the wellbore treatment fluid is a gravel packing fluid and contains gravel.
1 more element
A wellbore treatment fluid comprising:
- an aqueous solution or dispersion of a first polymer to thicken the fluid;
- a cross-linking agent to increase viscosity of the fluid by cross-linking the first polymer, wherein the cross-linking agent is a second polymer comprising at least one polymer chain with phenyl boronate groups distributed along the polymer chain, and wherein each phenyl boronate group comprises a phenyl group and a boronate group and has a nitrogen atom attached to the phenyl group at a position which is meta relative to the boronate group;
- and
- one or more of a corrosion inhibitor, a chelating agent, an electrolyte, or a friction reducer.
1 more element
A wellbore treatment fluid comprising:
- an aqueous solution or dispersion of a first polymer to thicken the fluid;
- and
- a cross-linking agent to increase viscosity of the fluid by cross-linking the first polymer, wherein the cross-linking agent is a second polymer comprising at least one polymer chain with phenyl boronate groups distributed along the polymer chain, and wherein each phenyl boronate group comprises a phenyl group and a boronate group and has a nitrogen atom attached to the phenyl group at a position which is meta relative to the boronate group;
- wherein the wellbore treatment fluid is an energized fluid formed by injecting gas into a wellbore concomitantly with the wellbore treatment fluid.
1 more element
A wellbore treatment fluid comprising:
- an aqueous solution or dispersion of a first polymer to thicken the fluid;
- and
- a cross-linking agent to increase viscosity of the fluid by cross-linking the first polymer, wherein the cross-linking agent is a second polymer comprising at least one polymer chain with phenyl boronate groups distributed along the polymer chain, and wherein each phenyl boronate group comprises a phenyl group and a boronate group and has a nitrogen atom attached to the phenyl group at a position which is meta relative to the boronate group;
- wherein the wellbore treatment fluid contains plugs to achieve zonal isolation or to prevent fluid loss.
1 more element
A wellbore treatment fluid comprising:
- an aqueous solution or dispersion of a first polymer to thicken the fluid;
- a cross-linking agent to increase viscosity of the fluid by cross-linking the first polymer, wherein the cross-linking agent is a second polymer comprising at least one polymer chain with phenyl boronate groups distributed along the polymer chain, and wherein each phenyl boronate group comprises a phenyl group and a boronate group and has a nitrogen atom attached to the phenyl group at a position which is meta relative to the boronate group;
- and
- a fiber component to improve one or more of particle suspension, particle transport capabilities, or gas phase stability.
1 more element
Dependencies are inferred from the claim text.