Backup and packer
A backup including a capture ring, and a backup ring articulated to the capture ring.
1. A backup comprising:
a capture ring including a support member having a root and a distal end, the member extending from the capture ring between but not including an inside diameter of the capture ring and an outside diameter of the capture ring; and
a backup ring articulated to the capture ring.
2. The backup as claimed in claim 1 wherein the capture ring includes a load brace.
3. The backup as claimed in claim 1 wherein the support member is cantilevered from the capture ring.
4. The backup as claimed in claim 1 wherein the support member extends from the capture ring to an extent that when deformed radially outwardly during use, a distal end of the support member falls between a gauge diameter of a packer in which the backup is installed and an inside diameter surface of a tubular member in which the packer is set.
5. A backup comprising:
a capture ring including a support member wherein at an intersection between the support member and the capture ring there is a stress reduction opening; and
a backup ring articulated to the capture ring.
6. The backup as claimed in claim 1 wherein the backup ring includes a bulbous base.
7. The backup as claimed in claim 6 wherein the bulbous base is received in a recess of the capture ring, the bulbous base and the recess forming the articulation between the backup ring and the capture ring.
8. The backup as claimed in claim 1 further including a resilient member disposed adjacent the capture ring and configured to maintain the backup in contact with a packer element during use.
9. A packer comprising:
a mandrel;
an element disposed about the mandrel; and
a backup as claimed in claim 1 disposed about the mandrel and adjacent the element.
10. The packer as claimed in claim 9 further comprising an intensifier configuration.
11. The packer as claimed in claim 10 wherein the intensifier configuration is a reduced annular area radially outward of the mandrel.
12. The backup as claimed in claim 10 wherein the intensifier configuration is a ramp.
13. A packer comprising:
a mandrel;
an element disposed about the mandrel;
a backup having a capture ring;
a backup ring articulated to the capture ring disposed about the mandrel and adjacent the element,
an intensifier configuration disposed at the mandrel, wherein the intensifier configuration is a step.
14. A wellbore comprising:
a borehole in a subsurface formation;
a string in the borehole including a backup as claimed in claim 1 .
15. The wellbore as claimed in claim 14 wherein the backup is a part of a packer.