Method of preparing and using drag-reducing dispersion polymer compositions

Patent metadata

Field	Value
Publication number	US-10144865-B2
Application number	US-201815907226-A
Country	US
Kind code	B2
Filing date	Feb 27, 2018
Priority date	Nov 10, 2008
Publication date	Dec 4, 2018
Grant date	Dec 4, 2018

Abstract

A method of preparing a drag-reducing composition that includes a dispersion polymer includes steps for preparing the dispersion polymer, steps for incorporating the dispersion polymer into a drag-reducing composition, and steps for using the drag-reducing composition. The step of preparing a dispersion polymer includes preparing an aqueous mixture by adding a water-soluble salt and at least one polymeric dispersant to water and polymerizing one or more water-soluble monomers in the aqueous mixture. Once the dispersion polymer has been combined with the drag-reducing additive, the combination is injected into a subterranean formation, a pipeline or a gathering line.

First claim

It is claimed:

1. A method comprising the steps of:
preparing a dispersion polymer, wherein the step of preparing the dispersion polymer comprises:
preparing an aqueous mixture by adding a water-soluble salt, at least one polymeric dispersant, and one or more water-soluble monomers to water; and
polymerizing the one or more water-soluble monomers in the aqueous mixture;

preparing a drag-reducing additive by mixing the dispersion polymer with a surfactant and a solvent;
forming a drag-reducing composition by combining the drag-reducing additive with an aqueous treatment fluid; and
injecting the drag-reducing composition into a subterranean formation, a pipeline or a gathering line.

2. The method of claim 1 , wherein the step of forming the drag-reducing composition with the aqueous treatment fluid further comprises the step of adding the drag-reducing additive into the aqueous treatment fluid on-the-fly as the aqueous treatment fluid is pumped into the subterranean formation, pipeline or gathering line.

3. The method of claim 1 , wherein the step of forming the drag-reducing composition further comprises the step of adding the drag-reducing additive to the aqueous treatment fluid before the drag-reducing composition is pumped into the subterranean formation, pipeline or gathering line.

4. The method of claim 1 , wherein the step of forming the drag-reducing composition further comprises adding from about 0.01 gallons to about 50 gallons of drag-reducing additive per 1,000 gallons of the aqueous treatment fluid.

5. The method of claim 1 , wherein the step of preparing the drag-reducing additive further comprises mixing 40-85% by weight of the dispersion polymer with 10-35% by weight of a surfactant with an HLB greater than 8 and 5-30% by weight of a solvent.

6. A method comprising the steps of:
preparing a dispersion polymer, wherein the step of preparing the dispersion polymer comprises:
preparing an aqueous mixture by adding a water-soluble salt, at least one polymeric dispersant, and one or more water-soluble monomers to water; and
polymerizing the one or more water-soluble monomers in the aqueous mixture;

preparing a drag-reducing additive by mixing 40-85% by weight of the dispersion polymer with 10-35% by weight of a surfactant with an HLB greater than 8 and 5-30% by weight of a solvent;
forming the drag-reducing composition by combining the drag-reducing additive with an aqueous treatment fluid; and
injecting the drag-reducing composition into a subterranean formation, a pipeline or a gathering line.

7. The method of claim 6 , wherein the step of forming the drag-reducing composition with the aqueous treatment fluid further comprises the step of adding the drag-reducing additive into the aqueous treatment fluid on-the-fly as the aqueous treatment fluid is pumped into the subterranean formation, pipeline or gathering line.

8. The method of claim 6 , wherein the step of forming the drag-reducing composition further comprises the step of adding the drag-reducing additive to the aqueous treatment fluid before the drag-reducing composition is pumped into the subterranean formation, pipeline or gathering line.

9. The method of claim 6 , wherein the step of forming the drag-reducing composition further comprises adding from about 0.01 gallons to about 50 gallons of drag-reducing additive per 1,000 gallons of the aqueous treatment fluid.

10. A method comprising the steps of:
preparing a dispersion polymer;
preparing a drag-reducing additive by mixing the dispersion polymer with a surfactant and a solvent;
forming a drag-reducing composition by combining the drag-reducing additive with an aqueous treatment fluid; and
injecting the drag-reducing composition into a subterranean formation, a pipeline or a gathering line.

11. The method of claim 10 , wherein the step of preparing the dispersion polymer comprises:
preparing an aqueous mixture by adding a water-soluble salt, at least one polymeric dispersant, and one or more water soluble monomers to water; and
polymerizing the one or more water-soluble monomers in the aqueous mixture.

12. The method of claim 10 , wherein the step of preparing the drag-reducing additive further comprises mixing 40-85% by weight of the dispersion polymer with 10-35% by weight of a surfactant with an HLB greater than 8 and 5-30% by weight of the solvent.

13. The method of claim 10 , wherein the step of forming the drag-reducing composition by combining the drag-reducing additive with the aqueous treatment fluid further comprises the step of adding the drag-reducing additive into the aqueous treatment fluid on-the-fly as the aqueous treatment fluid is pumped into the subterranean formation, pipeline or gathering line.

14. The method of claim 10 , wherein the step of forming the drag-reducing composition by combining the drag-reducing additive with the aqueous treatment fluid further comprises the step of adding the drag-reducing additive to the aqueous treatment fluid before the drag-reducing composition is pumped into the subterranean formation, pipeline or gathering line.

15. The method of claim 10 , wherein the step of forming the drag-reducing composition by combining the drag-reducing additive with the aqueous treatment fluid further comprises the step of adding from about 0.01 gallons to about 50 gallons of drag-reducing additive per 1,000 gallons of the aqueous treatment fluid.

Assignees

• Flotek Chemistry Llc

Inventors

• Zelenev Andrei
• Champagne Lakia
• Philpot David

Classifications

• E21B43/20

  Displacing by water · CPC title

• C09K8/68 Primary

  containing organic compounds · CPC title

• C09K8/82

  Oil-based compositions (C09K8/64 takes precedence) · CPC title

• C09K8/528

  inorganic depositions, e.g. sulfates or carbonates · CPC title

• C09K8/584

  characterised by the use of specific surfactants · CPC title