Seal assembly for use in earth-boring rotary tools in subterranean boreholes and related methods
US11131148B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 27, 2019 |
| Grant date | Sep 28, 2021 |
| Priority date | — |
| Expiry date | Nov 11, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/3496
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An earth-boring rotary tool includes a body comprising a pin, a roller cone mounted on the pin, and a seal assembly disposed between the pin and the roller cone. The seal assembly includes a seal ring to form a seal between the seal ring and the roller cone. The seal assembly includes a first polymer ring, while compressed, applies a first force on the seal ring that biases the seal ring towards the roller cone. The seal assembly includes a second polymer ring proximate the first polymer ring. The second polymer ring, while compressed, applies a second force on the seal ring to further bias the seal ring towards the roller cone. The second force is greater than the first force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.