Well tool having a metal seal and bi-directional lock
US4588030A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 27, 1984 |
| Grant date | May 13, 1986 |
| Priority date | — |
| Expiry date | Sep 27, 2004 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/01
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A well tool, for setting in a nipple having a locking notch, including a body with initially retracted first and second locking dogs with a threaded actuator for moving the first and second dogs axially relative to each other and into engagement with the top and bottom of the locking notch for preventing axial movement of the body in the nipple. A plurality of metal cup sealing rings positioned about the body and expandable into a sealing relationship between the body and the nipple by a piston. A tapered expander extends into each of the sealing cups and at least one of the rings is positioned with the cups directed oppositely to the cup in another ring for holding pressure in both directions. The cup rings are shaped for setting in a sequential order starting with the rings furthest from the piston. A protector sleeve is releasably connected to the body and initially encloses the locking dogs and the sealing rings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.