Oil well string member with static seal
US4421323A · kind A · utility
5Cited by
8References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 30, 1982 |
| Grant date | Dec 20, 1983 |
| Priority date | — |
| Expiry date | Aug 30, 2002 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/48
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An oil well string member has a cylindrical outer periphery having first and second cylindrical surfaces axially spaced and connected by a tapered ramp. The surfaces are radially inwardly of the outer periphery. The first surface has a smaller diameter than the second surface. A seal assembly is provided along the first surface and arranged to respond to fluid pressure for moving the assembly across the ramp to the second surface to a sealing position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.