Composite segmenting backup ring for a subterranean plug
US9828827B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2014 |
| Grant date | Nov 28, 2017 |
| Priority date | — |
| Expiry date | Jan 29, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/1291
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A composite plug that can be used in fracturing has backup rings for the seal that are preferably made of a composite material. The backup rings are essentially connected segments that allow the connections to break when the plug is set and the cones are brought closer together. When the rings break to form gaps between segments in a specific ring, the adjacent ring has offset gaps so that as a whole there are no extrusion gaps that would allow the seal element to pass. The rings can be rotationally locked to each other initially at the adjacent segments that are formed when the plug is set to maintain their relative positions so that gaps between segments adjacent the seal are overlapped with segments from the adjacent ring. The segmenting backup rings can be used on one or on both sides of a sealing element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.