Cement admixture including polymers

• US 10,717,916 B2
• Filed: 09/04/2013
• Issued: 07/21/2020
• Est. Priority Date: 09/04/2013
• Status: Active Grant

• Current Assignee: Halliburton Energy Services Incorporated (Halliburton Company)
• Original Assignee: Halliburton Energy Services Incorporated (Halliburton Company)
• Inventors: Pisklak, Thomas J., Lewis, Sam J., Boul, Peter James, Otieno, Pauline Akinyi, Agapiou, Kyriacos
• Primary Examiner(s): Harlan, Robert D
• Application Number:
  US14/907,436
• Publication Number:
  US 20160186036A1
• Time in Patent Office: 2,512 Days
• CPC Class Codes: C04B 2103/0079 Rheology influencing agents
• CPC Class Codes: C04B 24/163 obtained by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: C04B 24/2647 containing polyether side chains
• CPC Class Codes: C04B 24/2652 Nitrogen containing polymers, e.g. polyacrylamides, polyacrylonitriles
• CPC Class Codes: C04B 24/283 Polyesters
• CPC Class Codes: C04B 24/38 Polysaccharides or derivatives thereof C04B24/243 takes precedence
• CPC Class Codes: C04B 24/383 Cellulose or derivatives thereof
• CPC Class Codes: C04B 28/02 containing hydraulic cements other than calcium sulfates
• CPC Class Codes: C09K 8/467 containing additives for specific purposes
• CPC Class Codes: E21B 33/14 for cementing casings into boreholes

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).

Claims

1. A composition for modifying rheology of a cement slurry, comprising:

one or more polycarboxylate ethers;

one or more functionalized acrylamide co-polymers; and

one or more polysaccharide biopolymers, wherein each of the one or more polysaccharide biopolymers is a viscosifier;

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; and

wherein the composition mitigates settling of solids and gelation in the cement slurry.

2. The composition of claim 1, further comprising the cement slurry, wherein the composition mitigates settling of solids and gelation in the cement slurry for at least 24 hours, wherein the cement slurry is 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 one or more polysaccharide biopolymers are selected from the group consisting of:

scleroglucan, carrageenan, xanthan, welan, diutan gum, cellulose, hydroxyl ethyl cellulose, and combinations thereof.

6. A method of servicing a wellbore, comprising:

combining an admixture composition and a cement slurry to produce a cement composition, wherein the admixture composition comprises;

one or more polycarboxylate ethers;

one or more functionalized acrylamide co-polymers; and

one or more polysaccharide biopolymers, wherein each of the one or more polysaccharide biopolymers is a viscosifier;

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; and

wherein the admixture composition mitigates settling of solids and gelation in the cement slurry; and

placing the cement composition in the wellbore.

7. The method of claim 6, further comprising allowing the cement composition to set in the wellbore.

8. The method of claim 6, wherein the one or more functionalized acrylamide co-polymers is an acrylamido-methyl-propane sulfonate polymer-N-functionalized acrylamide co-polymer.

9. The method of claim 6, wherein the one or more functionalized acrylamide co-polymers is a co-polymer of acrylamide-methyl-propane and dimethylacrylamide.

10. The method of claim 6, 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.

11. The method of claim 6, wherein the one or more polysaccharide biopolymers are selected from the group consisting of:

scleroglucan, carrageenan, xanthan, welan, diutan gum, cellulose, hydroxyl ethyl cellulose, and combinations thereof.

12. The method of claim 6, wherein the admixture composition mitigates settling of solids and gelation in the cement slurry for at least 24 hours, wherein the cement slurry is an extended life cement slurry.