Cement set activators for set-delayed cement compositions and associated methods

Patent metadata

Field	Value
Publication number	US-9920235-B2
Application number	US-201615162245-A
Country	US
Kind code	B2
Filing date	May 23, 2016
Priority date	Mar 9, 2012
Publication date	Mar 20, 2018
Grant date	Mar 20, 2018

Abstract

Disclosed herein are cement compositions and methods of using set-delayed cement compositions in subterranean formations. In one embodiment, a method of cementing in a subterranean formation is described. The method may comprise providing a set-delayed cement composition comprising water, pumice, hydrated lime, and a set retarder; activating the set-delayed cement composition with a liquid additive to produce an activated cement composition, wherein the liquid additive comprises a monovalent salt, a polyphosphate, a dispersant, and water; and allowing the activated cement composition to set.

First claim

What is claimed is:

1. A method of making an activated cement composition, the method comprising:
providing a set-delayed cement composition comprising:
water;
pumice;
hydrated lime;
a set retarder selected from the group consisting of diethylenetriaminepentamethylenephosphonate, nitrilotrismethylenetriphosphonate, methylene phosphonates, methylene phosphonic acid derivatives, and combinations thereof; and

adding a liquid activator to the set-delayed cement composition, wherein the liquid activator comprises water, a dispersant, a monovalent salt, and a polymeric metaphosphate salt.

2. The method of claim 1 wherein the polymeric metaphosphate salt comprises sodium hexametaphosphate.

3. The method of claim 1 wherein the monovalent salt comprises sodium sulfate.

4. The method of claim 1 wherein the dispersant comprises a polycarboxylated ether dispersant.

5. A method of making an activated cement composition, the method comprising:
providing a set-delayed cement composition comprising:
water;
pumice;
hydrated lime; and
a set retarder selected from the group consisting of diethylenetriaminepentamethylenephosphonate, nitrilotrismethylenetriphosphonate, methylene phosphonates, methylene phosphonic acid derivatives, and combinations thereof;

storing the set-delayed cement composition in a pumpable fluid state for at least about one day; and
adding a liquid activator to the set-delayed cement composition, wherein the liquid activator comprises water, a dispersant, a polymeric metaphosphate salt and monovalent salt.

6. The method of claim 5 , wherein the dispersant is present in an amount in a range of about 0.01% to about 5% by weight of pumice.

7. The method of claim 5 wherein the set retarder is present in an amount in a range of about 0.01% to about 10% by weight of pumice.

8. The method of claim 5 wherein the hydrated lime is present in a range of about 10% to about 100% by weight of pumice.

9. The method of claim 5 wherein the water is present in an amount in the range of about 33% to about 200% by weight of pumice.

10. The method of claim 5 wherein the polymeric metaphosphate salt comprises sodium hexametaphosphate.

11. The method of claim 5 wherein a pumice-to-hydrated-lime weight ratio of about 10:1 to about 1:1.

12. The method of claim 5 wherein the water is present in an amount sufficient to form a pumpable slurry.

13. The method of claim 5 wherein a ratio of the monovalent salt to the polymeric metaphosphate salt is about 5:1 to about 1:25.

14. An activated cement composition comprising:
water;
pumice;
hydrated lime;
a set retarder selected from the group consisting of diethylenetriaminepentamethylenephosphonate, nitrilotrismethylenetriphosphonate, methylene phosphonates, methylene phosphonic acid derivatives, and combinations thereof; and
a liquid activator, wherein the liquid activator comprises water polymeric metaphosphate salt, a dispersant, and a monovalent salt.

Assignees

• Halliburton Energy Services Inc

Inventors

• Boul Peter James
• Pisklak Thomas Jason
• Lewis Samuel J
• Agapiou Kyriacos
• Brothers Lance Everett
• Otieno Pauline Akinyi
• Morgan Ronnie Glen
• Adams Baya
• Harris Cody Glenn

Classifications

• E21B33/14

  for cementing casings into boreholes · CPC title

• E21B33/138

  Plastering the borehole wall; Injecting into the formation · CPC title

• C09K8/428

  for squeeze cementing, e.g. for repairing · CPC title

• C04B40/0658

  Retarder inhibited mortars activated by the addition of accelerators or retarder-neutralising agents · CPC title

• C04B14/062

  Microsilica, e.g. colloïdal silica (preparing microsilica slurries or suspensions C04B18/148) · CPC title