Magnetically controlled delivery of subterranean fluid additives for use in subterranean applications

• US 8,424,598 B2
• Filed: 09/21/2010
• Issued: 04/23/2013
• Est. Priority Date: 09/21/2010
• Status: Expired due to Fees

• Current Assignee: Halliburton Energy Services Incorporated (Halliburton Company)
• Original Assignee: Halliburton Energy Services Incorporated (Halliburton Company)
• Inventors: Roddy, Craig W.
• Primary Examiner(s): Bates, Zakiya W
• Application Number:
  US12/887,175
• Publication Number:
  US 20120067577A1
• Time in Patent Office: 945 Days
• Field of Search: None
• US Class Current: 166/248
• CPC Class Codes: C04B 40/0641 Mechanical separation of ingredients, e.g. accelerator in breakable microcapsules
• CPC Class Codes: C04B 40/0658 Retarder inhibited mortars activated by the addition of accelerators or retarder-neutralising agents
• CPC Class Codes: C09K 8/42 Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells compositions for plastering C09K8/50
• CPC Class Codes: C09K 8/467 containing additives for specific purposes

Abstract

Methods for providing controlled delivery of subterranean fluid additives to a well bore treatment fluid and/or a surrounding subterranean environment using intelligent materials that respond to a magnetic stimulus to release subterranean fluid additives downhole in a subterranean environment. The methods include releasing a subterranean fluid additive in a subterranean formation including providing a magnetically-sensitive component that includes a subterranean fluid additive; providing a magnetic source; and releasing the subterranean fluid additive in the subterranean formation from the magnetically-sensitive component using a magnetic force generated from the magnetic source.

Claims

1. A method of releasing a subterranean fluid additive in a subterranean formation comprising:

providing a magnetically-sensitive component that comprises a subterranean fluid additive;

providing a magnetic source; and

releasing the subterranean fluid additive in the subterranean formation from the magnetically-sensitive component using a magnetic force generated from the magnetic source,

wherein the magnetically-sensitive component is a ferrogel.

2. The method of claim 1 wherein the magnetically-sensitive component is a mechanically activated device.

3. The method of claim 1 wherein the ferrogel comprises a polymer matrix and a magnetic species.

4. The method of claim 3 wherein the polymer matrix comprises poly(vinyl alcohol).

5. The method of claim 1 wherein the subterranean fluid additive is selected from the group consisting of:

a cement activator, a crosslinking agent, and a curing agent.

6. The method of claim 1 wherein the magnetic source is located on a wireline placed in a well bore penetrating the subterranean formation.

7. The method of claim 1 wherein the magnetic source comprises an electromagnet.

8. The method of claim 1 wherein the magnetic source is located within a plug that is placed in a well bore penetrating the subterranean formation.

9. The method of claim 8 wherein the plug is a cementing plug.

10. A method comprising:

using a magnetic source to release a subterranean fluid additive in a subterranean formation,

wherein the subterranean fluid additive is released from a ferrogel.

11. The method of claim 10 wherein the subterranean fluid additive is released from a mechanically activated device.

12. The method of claim 10 wherein the ferrogel comprises a polymer matrix and a magnetic species.

13. The method of claim 12 wherein the polymer matrix comprises poly(vinyl alcohol).

14. The method of claim 10 wherein the subterranean fluid additive is selected from the group consisting of:

a cement activator, a crosslinking agent, and a curing agent.

15. The method of claim 10 wherein the magnetic source comprises an electromagnet.

16. A method of cementing comprising:

providing a cement composition that comprises a magnetically-sensitive component;

providing a magnetic source;

releasing a cement activator from the magnetically-sensitive component using a magnetic force generated from the magnetic source; and

allowing the cement composition to set,

wherein the magnetically-sensitive component is a ferrogel.

17. The method of claim 16 wherein the magnetically-sensitive component is a mechanically activated device.

18. The method of claim 16 wherein the ferrogel comprises a polymer matrix and a magnetic species.

19. The method of claim 18 wherein the polymer matrix comprises poly(vinyl alcohol).

20. The method of claim 16 wherein the magnetic source comprises an electromagnet.

21. The method of claim 16 wherein the cement composition comprises a hydraulic cement selected from the group consisting of:

Portland cement, pozzolana cement, gypsum cement, high-alumina-content cement, slag cement, silica cement, and any combination thereof.

22. The method of claim 16 wherein the cement activator activates hydration of a cement composition.

23. The method of claim 16 further comprising:

placing the cement composition in a subterranean formation.