Drill bit with extended life seal
US9677341B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 2010 |
| Grant date | Jun 13, 2017 |
| Priority date | — |
| Expiry date | Jan 11, 2032 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/25
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An extended life seal is incorporated into a drill bit used for drilling a wellbore. The drill bit can include a seal surface, a seal which engages the seal surface, and a groove which compresses the seal greater on opposite axial sides than at a central portion of the seal. The drill bit may include the seal having a cylindrical surface which engages the seal surface, and another cylindrical surface opposite the first surface, and the groove having a third cylindrical surface which engages the second surface, and wherein the groove simultaneously biases the seal toward the seal surface on opposite axial sides of the third surface. The drill bit may include the seal having right cylindrical shaped inner and outer surfaces, and a contact pressure between the seal surface and the seal being greater at each opposite side of the seal than at a central portion of the seal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.