Heat-resistant seal material, endless seal member using heat-resistant seal material, and downhole apparatus including endless seal member
US7919554B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 3, 2008 |
| Grant date | Apr 5, 2011 |
| Priority date | — |
| Expiry date | May 4, 2029 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/1208
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A heat-resistant seal material includes 100 parts by weight of a ternary fluoroelastomer, 1 to 30 parts by weight of vapor-grown carbon fibers having an average diameter of more than 30 nm and 200 nm or less, and carbon black having an average particle diameter of 25 to 500 nm. The heat-resistant seal material contains the vapor-grown carbon fibers and the carbon black in an amount of 20 to 40 parts by weight in total. The heat-resistant seal material has a compression set when subjected to a compression set test at a compression rate of 25% and a temperature of 200° C. for 70 hours of 0 to 15% and a dynamic modulus of elasticity at 200° C. (E′/200° C.) of 30 to 100 MPa.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.