Tubular coupling with metal to metal seal
US5423579A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 17, 1983 |
| Grant date | Jun 13, 1995 |
| Priority date | — |
| Expiry date | Jan 17, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L15/04
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Metal-to-metal seals for pin and box member tubular joints are disclosed where mating annular surfaces are machined at slightly different angles such that the bearing load from initial contact is entirely on the leading edge of the pin annular surface and the trailing edge of the box annular surface. The mismatch of the sealing surfaces is selected for any particular seal geometry such that at final make-up, the bearing load has a relatively even distribution across the entire sealing surface in contact, thus broadly distributing make-up bearing stresses and minimizing any resulting tendency for galling that may occur, in particular for joints having relatively thick walls for both pin and box members.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.