EXPANDABLE STRUCTURE FOR DEPLOYMENT IN A WELL

• US 20100243274A1
• Filed: 02/26/2010
• Published: 09/30/2010
• Est. Priority Date: 12/21/2007
• Status: Active Grant

• Current Assignee: Schlumberger Technology Corporation (Schlumberger NV)
• Original Assignee: Schlumberger Technology Corporation (Schlumberger NV)
• Inventors: Munro, Logan, Robisson, Agathe, Guerrero, Julio C., Wicks, Nathan
• Granted Patent: US 8,733,453 B2
• Time in Patent Office: Days
• US Class Current: 166/382
• CPC Class Codes: E21B 23/001 Self-propelling systems or apparatus, e.g. for moving tools within the horizontal portion of a borehole
• CPC Class Codes: E21B 23/14 for displacing a cable or a cable-operated tool, e.g. for logging or perforating operations in deviated wells
• CPC Class Codes: E21B 4/18 Anchoring or feeding in the borehole
• CPC Class Codes: E21B 43/103 of expandable casings, screens, liners, or the like

Abstract

An expandable structure for passive deployment in a well. The structure may be locked in a position determined by the inner dimensions of the well in which it is deployed. Practical uses for the structure may include production tubing or a host of other devices for affixing downhole with a final diameter as determined by the inner diameter of the well. Additionally, the structure may be configured for advancement to a targeted well location while in a collapsed state. Thus, upon deployment, subsequent structures may be advanced through the expanded/deployed structure. As such, affixed structures may be deployed downhole in both top-down and bottom-up fashions without concern over a prior deployed structure obstructing subsequent structure deployment downhole thereof.

Claims

1. An expandable structure for deployment in a well, the structure comprising a plurality of linked modules configured for dynamically defining an outer diameter of the structure based on an inner diameter of the well upon deployment.

2. The expandable structure of claim 1 wherein the defining includes locking the outer diameter of the structure in place.

3. The expandable structure of claim 1 wherein the outer diameter of the structure takes on a configuration that is one of circumferential, elliptical, and polygonal.

4. The expandable structure of claim 1 wherein the deployment is in the form of one of a production tubing segment, a packer, a restriction and a downhole support structure.

5. The expandable structure of claim 1 wherein each module comprises a forward member jointed to a rearward member about a central pivot.

6. The expandable structure of claim 5 configured for transitioning between a collapsed state for mobility and an expanded state for the deployment.

7. The expandable structure of claim 6 wherein said members are configured for synchronized rotation about the pivot for the transitioning.

8. The expandable structure of claim 6 wherein an outer diameter of the structure in the collapsed state is smaller than an inner diameter of the structure in an expanded state.

9. The expandable structure of claim 6 wherein an expansion ratio between the structure in the collapsed state and the structure in the expanded state is between about 5% and about 500%.

10. The expandable structure of claim 1 further comprising one of a compliant material layer and a plurality of structural compliant members disposed about said plurality to interface a wall of the well upon the deployment.

11. The expandable structure of claim 10 wherein said compliant material layer is of a conformable material for sealing at the interface and selected from a group consisting of a polymer, a rubber, an elastomer and foam.

12. The expandable structure of claim 10 wherein the compliant material layer is a conformable material multi-wrapped about said plurality in a collapsed state of the structure.

13. The expandable structure of claim 12 wherein the conformable material is configured for unraveling to allow an expanded state of the structure during the deployment.

14. The expandable structure of claim 13 further comprising anti-friction material at an underside of said conformable material to promote the unraveling.

15. The expandable structure of claim 14 wherein said anti-friction material is a thermoplastic polymer.

16. The expandable structure of claim 10 wherein said plurality is configured as an arch-like main body to transition force through said compliant material layer to the wall upon the deployment.

17. The expandable structure of claim 16 wherein the body is of a plurality of bodies occupying substantially an entire underside of said complaint material layer.

18. The expandable structure of claim 1 wherein said plurality is a first plurality, the structure further comprising a second plurality, said pluralities defining opposite ends of the structure.

19. The expandable structure of claim 18 further comprising at least one support bar disposed between said pluralities and coupled thereto.

20. The expandable structure of claim 19 wherein said at least one support bar is configured to aid in actuation of the deployment.

21. An expandable structure comprising:

a plurality of linked modules configured to transition the structure between a collapsed state for mobility and an expanded state for deployment in a well; and

at least one locking mechanism of the module to ensure maintenance of at least a minimum state of expansion for the structure upon the deployment.

22. The expandable structure of claim 21 wherein a module of the plurality comprises a first member jointed to a second member about a central pivot.

23. The expandable structure of claim 22 wherein said first member comprises a pawl of said locking mechanism and said second member accommodates a tooth at a face thereof, the pawl configured for engagement of the tooth for the maintenance.

24. The expandable structure of claim 23 wherein the engagement occurs as said members rotate about the pivot to induce the expanded state.

25. The expandable structure of claim 23 further comprising a biasing component of the first member to direct the engagement.

26. The expandable structure of claim 23 wherein the face is ratcheted with the tooth as a first tooth and further including at least one other tooth, the minimum state of expansion being an initial minimum state of expansion, a greater minimum state of expansion maintained as the pawl engages the at least one other tooth.

27. A method of deploying an expandable structure in a well, the method comprising:

advancing the structure in a collapsed state to a location in the well; and

passively expanding a plurality of linked modules for transitioning of the structure to an expanded state at the location, a level of expansion for the expanded state defined by the well thereat.

28. The method of claim 27 wherein advancing comprises inchworm advancement through a series of collapsible structures for maintaining pressure control.

29. The method of claim 27 wherein passively expanding comprises locking the structure at least a minimum level of expansion.

30. The method of claim 29 wherein passively expanding further comprises ratcheting the structure up to a level of expansion beyond the minimum level.

31. The method of claim 27 wherein the structure is a first structure, the method further comprising advancing a second expandable structure in a collapsed state into the first structure.

32. The method of claim 31 further comprising advancing the second structure through the first structure to a location downhole thereof for deployment.

33. The method of claim 29 further comprising performing at least one wellbore operation in the well.