Metal expandable element back-up ring for high pressure/high temperature packer
First Claim
Patent Images
1. An expandable backup ring comprising:
- an outer surface;
an inner surface having a plurality of protrusions projecting radially inwardly; and
a plurality of segments, the segments defined by a plurality of outer surface cuts, wherein each sequential pair of outer cuts defines a segment,wherein the plurality of outer surface cuts extends radially inwardly from the outer surface and partially into each of the plurality of protrusions.
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Abstract
An expandable backup ring includes an outer surface, an inner surface having a plurality of protrusions projecting radially inwardly, and a plurality of segments, the segments defined by a plurality of outer surface cuts. The plurality of outer surface cuts extends radially inwardly from the outer surface and partially into each of the plurality of protrusions.
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Citations
20 Claims
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1. An expandable backup ring comprising:
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an outer surface; an inner surface having a plurality of protrusions projecting radially inwardly; and a plurality of segments, the segments defined by a plurality of outer surface cuts, wherein each sequential pair of outer cuts defines a segment, wherein the plurality of outer surface cuts extends radially inwardly from the outer surface and partially into each of the plurality of protrusions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A expandable downhole system comprising:
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a packer element having an upper end and a lower end; an upper backup ring disposed adjacent the upper end of the packer element; an upper expandable backup ring configured to engage the upper backup ring, wherein the upper expandable backup ring comprises; an outer surface; an inner surface having a plurality of protrusions projecting radially inwardly; and a plurality of segments, the segments defined by a plurality of outer surface cuts, wherein each sequential pair of outer surface cuts defines one segment, wherein the plurality of outer surface cuts extends radially inwardly from the outer surface and partially into each of the plurality of protrusions; and an upper guide ring configured to engage the upper expandable backup ring. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A method of setting an expandable downhole system, the method comprising:
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positioning the expandable downhole system in a wellbore, the expandable downhole system comprising; a packer element having an upper end and a lower end; an upper backup ring disposed adjacent the upper end of the packer element, and a lower backup ring disposed adjacent the lower end of the packer element; an upper expandable backup ring configured to engage the upper backup ring, and a lower expandable backup ring configured to engage the lower backup ring, wherein the upper expandable backup ring and the lower expandable backup ring each comprise; an outer surface; an inner surface having a plurality of protrusions projecting radially inwardly; and a plurality of segments, the segments defined by a plurality of outer surface cuts, wherein each sequential pair of the outer surface cuts defines one segment, wherein the plurality of outer surface cuts extends radially inwardly from the outer surface and partially into each of the plurality of protrusions; and an upper guide ring configured to engage the upper expandable backup ring and a lower guide ring configured to engage the lower expandable backup ring; applying an axially compressive force against the expandable downhole system; radially expanding the packer element; and radially expanding the upper expandable backup ring and the lower expandable backup ring. - View Dependent Claims (17, 18, 19, 20)
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Specification