Dual hardness sealing elements for blowout preventer
US11761287B2 · kind B2 · utility
0Cited by
9References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2020 |
| Grant date | Sep 19, 2023 |
| Priority date | — |
| Expiry date | Jan 31, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2003/1053
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to sealing elements for blowout preventers comprising a sealing interface region, and a second region, wherein said sealing interface region is formed of a first polymer and said second region is formed of a second polymer, the first and second polymers having different Shore A hardnesses, including sealing elements made of dual hardness polyurethane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.