Cement Admixture Including Polymers

Patent metadata

Field	Value
Publication number	US-2016186036-A1
Application number	US-201314907436-A
Country	US
Kind code	A1
Filing date	Sep 4, 2013
Priority date	Sep 4, 2013
Publication date	Jun 30, 2016
Grant date	—

Abstract

Systems and methods for modifying rheology of a cement slurry are described. Systems and methods may include a composition including at least one of: one or more polycarboxylate ethers (PCEs); one or more functionalized polyacrylamide co-polymers; and one or more polysaccharide biopolymers (BP).

First claim

What is claimed is:

1 . A composition for modifying rheology of a cement slurry, the composition comprising:
one or more polycarboxylate ethers (PCEs); and one or more functionalized acrylamide co-polymers.

2 . The composition of claim 1 , further comprising an extended life cement slurry.

3 . The composition of claim 1 , wherein the one or more functionalized acrylamide co-polymers is an acrylamido-methyl-propane sulfonate polymer-N-functionalized acrylamide co-polymer.

4 . The composition of claim 1 , wherein the one or more functionalized acrylamide co-polymers is a co-polymer of acrylamide-methyl-propane and dimethylacrylamide.

5 . The composition of claim 1 , wherein the ratio of the one or more polycarboxylate ethers to the one or more functionalized acrylamide co-polymers is greater than or equal to 1.

6 . The composition of claim 5 , wherein the ratio of the one or more polycarboxylate ethers to the one or more functionalized acrylamide co-polymers is between approximately 1:1 and approximately 10:1.

7 . A composition for modifying rheology of a cement slurry, the composition comprising:
one or more polycarboxylate ethers (PCEs); one or more functionalized acrylamide co-polymers; and one or more polysaccharide biopolymers (BP).

8 . The composition of claim 7 , further comprising an extended life cement slurry.

9 . The composition of claim 7 , wherein the one or more functionalized acrylamide co-polymers is an acrylamido-methyl-propane sulfonate polymer-N-functionalized acrylamide co-polymer.

10 . The composition of claim 7 , wherein the one or more functionalized acrylamide co-polymers is a co-polymer of acrylamide-methyl-propane and dimethylacrylamide.

11 . The composition of claim 7 , wherein the one or more polysaccharide biopolymers are selected from the group consisting of: scleroglucan, carragenans, xanthan, welan, diutan gums, celluloses, hydroxyl ethyl celluloses, and combinations thereof.

12 . The composition of claim 7 , wherein the amount of the one or more polycarboxylate ethers is greater than the amount of the one or more functionalized acrylamide co-polymers, which is in turn greater than the amount of the one or more polysaccharide biopolymers.

13 . The composition of claim 7 , wherein the ratio of the one or more polycarboxylate ethers to the one or more functionalized acrylamide co-polymers to the one or more polysaccharide biopolymers is between approximately 9:3:1 and approximately 20:2:1.

14 . A method of servicing a wellbore comprising:
providing an admixture composition comprising one or more polycarboxylate ethers (PCEs) and one or more functionalized acrylamide co-polymers to an extended life cement slurry; and placing the cement composition in the subterranean formation.

15 . The method of claim 14 , further comprising allowing the cement composition to set in the subterranean formation.

16 . The method of claim 14 , wherein the one or more functionalized acrylamide co-polymers is an acrylamido-methyl-propane sulfonate polymer-N-functionalized acrylamide co-polymer.

17 . The method of claim 14 , wherein the one or more functionalized acrylamide co-polymers is a co-polymer of acrylamide-methyl-propane and dimethylacrylamide.

18 . The method of claim 14 , wherein the ratio of the one or more polycarboxylate ethers to the one or more functionalized acrylamide co-polymers is greater than or equal to 1.

19 . The method of claim 14 , wherein the admixture composition further comprises one or more polysaccharide biopolymers selected from the group consisting of: scleroglucan, carragenans, xanthan, welan, diutan gums, celluloses, hydroxyl ethyl celluloses, and combinations thereof.

20 . The method of claim 19 , wherein the ratio of the one or more polycarboxylate ethers to the one or more functionalized acrylamide co-polymers to the one or more polysaccharide biopolymers is between approximately 9:3:1 and approximately 20:2:1.

Assignees

• Halliburton Energy Services Inc

Inventors

• Pisklak Thomas J
• Lewis Sam J
• Boul Peter James
• Otieno Pauline Akinyi
• Kyriacos Agapiou

Classifications

• E21B33/14

  for cementing casings into boreholes · CPC title

• C04B24/2652

  Nitrogen containing polymers, e.g. polyacrylamides, polyacrylonitriles · CPC title

• C04B2103/0079

  Rheology influencing agents · CPC title

• C04B24/283

  Polyesters · CPC title

• C09K8/467 Primary

  containing additives for specific purposes · CPC title