Treatment plug, method of anchoring and sealing the same to a structure and method of treating a formation

Patent metadata

Field	Value
Publication number	US-10012053-B2
Application number	US-201414502203-A
Country	US
Kind code	B2
Filing date	Sep 30, 2014
Priority date	Jan 25, 2012
Publication date	Jul 3, 2018
Grant date	Jul 3, 2018

Abstract

A treatment plug includes, an anchor runnable and settable within a structure having, at least one slip movably engaged with the anchor to move radially into engagement with the structure in response to longitudinal movement of the at least one slip relative to surfaces of the treatment plug, at least one seal having a deformable metal member configured to radially deform into sealing engagement with the structure in response to being deformed radially outwardly, and a seat that is sealingly receptive to a plug.

First claim

What is claimed is:

1. A treatment plug comprising:
an anchor runnable and settable within a structure;
a collar connected to the anchor;
at least one slip movably disposed as a part of the anchor to move radially into engagement with the structure in response to longitudinal movement of the at least one slip relative to at least one second slip or a finger abutting the at least one slip, the at least one second slip or finger causing setting of the at least one slip due to longitudinal shortening of a combined length of the at least one slip and the at least one second slip or finger relative to an unset longitudinal combined length of the at least one slip and the at least one second slip or finger;
at least one seal disposed on the collar, the collar having a region radially inwardly of the at least one seal, the region defining a deformable metal member configured to radially outwardly deform into sealing engagement with the structure, the collar having an axial length that is reduced upon radially outwardly deforming the region; and
a seat that is sealingly receptive to a drop plug, the seat drawing nearer the anchor pursuant to the shortening of the collar.

2. The treatment plug of claim 1 , wherein each of the at least one slip have a first perimetrical edge that is perimetrically tapered relative to a second perimetrical edge, the first perimetrical edge being perimetrically opposite to the second perimetrical edge.

3. The treatment plug of claim 1 , wherein each of the at least one slip is perimetrically wedged between fingers of the treatment plug that are not radially movable.

4. The treatment plug of claim 3 , wherein perimetrical wedging causes a radial dimension defined by surfaces of the at least one slip to alter when the at least one slip is urged longitudinally relative to the fingers.

5. The treatment plug of claim 4 , wherein alteration of the radial dimension includes an increase thereof.

6. The treatment plug of claim 5 , wherein the increase of the radial dimension causes the at least one slip to fixedly engage with the structure to thereby anchor the treatment plug to the structure.

7. The treatment plug of claim 3 , wherein the first perimetrical edge of each of the at least one slip has a tongue engagable with a groove on a perimetrical edge of one of the fingers.

8. The treatment plug of claim 1 , wherein engagement of the at least one slip with the structure maintains the at least one slip in relative longitudinal position with others of the at least one slip.

9. The treatment plug of claim 1 , further comprising a polymeric member in operable communication with the deformable metal member configured to sealingly engage with both the deformable metal member and the structure when the deformable metal member is in a deformed configuration.

10. The treatment plug of claim 1 , wherein the deformable metal member once deformed is configured to remain substantially in a deformed position without external forces being applied thereto.

11. The treatment plug of claim 1 , wherein the treatment plug is configured to treat an earth formation through one or more of stimulating, fracturing, and acid treating.

12. The treatment plug of claim 1 , wherein the plug is a ball.

13. The treatment plug of claim 1 , wherein pressure built against a plug seated at the seat urges the at least one slip to longitudinally move relative to fingers of the treatment plug to maintain the anchor in a set position.

14. The treatment plug of claim 1 , wherein pressure built against a plug seated at the seat generates forces to longitudinally compress the at least one seal.

15. The treatment plug of claim 1 , wherein the at least one seal is positioned upstream of the seat in a direction defined by pressure to seat a plug against the seat.

16. The treatment plug of claim 1 , wherein a minimum through bore of the treatment plug is in the range of about 80% to 85% of the minimum radial dimension of the structure where the treatment plug is positioned.

17. The treatment plug of claim 1 , wherein the treatment plug is configured to produce through a minimum bore dimension therethrough without having to be milled or drilled to increase a size thereof.

18. A method of anchoring and sealing a treatment plug to a structure, comprising:
longitudinally moving at least one slip relative to surfaces of the treatment plug;
altering a radial dimension defined by at least one slip;
anchoring the at least one slip to a structure by moving the at least one slip relative to at least one second slip or a finger abutting the at least one slip, the at least one second slip or finger causing setting of the at least one slip due to longitudinal shortening of a combined length of the at least one slip and the at least one second slip or finger relative to an unset longitudinal combined length of the at least one slip and the at least one second slip or finger;
radially deforming at least one deformable member of a collar of the treatment plug and shortening the collar;
reducing an axial dimension of the plug; and
sealingly engaging the structure with the at least one deformable member.

19. The method of anchoring and sealing a treatment plug to a structure of claim 18 , further comprising longitudinally compressing the at least one deformable member between a drop plug seated at a seat and the at least one slip.

20. A method of treating a formation, comprising:
longitudinally compressing at least one slip relative to other portions of a treatment plug containing the at least one slip;
radially moving the at least one slip;
anchoring the treatment plug to a structure within a formation by moving the at least one slip relative to at least one second slip or a finger abutting the at least one slip, the at least one second slip or finger causing setting of the at least one slip due to longitudinal shortening of a combined length of the at least one slip and the at least one second slip or finger relative to an unset longitudinal combined length of the at least one slip and the at least one second slip or finger;
reducing an axial length of the plug by shortening a collar of the plug;
radially deforming a seal related to shortening of the collar;
sealing the seal to the structure;
seating a drop plug against a seat;
pumping a fluid against the seated plug; and
treating the formation with the pumped fluid.

21. The method of treating a formation of claim 20 , further comprising stimulating the formation with the pumped fluid.

22. The method of treating a formation of claim 20 , further comprising fracturing the formation with the pumped fluid.

23. The method of treating a formation of claim 20 , further comprising longitudinally compressing the seal with pressure against the seated drop plug.

Assignees

• Xu Yingqing
• Kelbie Graeme Michael
• Baker Hughes A Ge Co Llc

Inventors

• Xu Yingqing
• Kelbie Graeme Michael

Classifications

• E21B23/01

  for anchoring the tools or the like (E21B23/02 - E21B23/06 take precedence; anchoring of drives in the borehole E21B4/18) · CPC title

• E21B33/129

  with mechanical slips for hooking into the casing (E21B33/122, E21B33/124 take precedence) · CPC title

• E21B33/134 Primary

  Bridging plugs · CPC title