Downhole swivel sub
US8191639B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 2006 |
| Grant date | Jun 5, 2012 |
| Priority date | — |
| Expiry date | Jun 15, 2026 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/05
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention provides a swivel sub for connection in a work string between a workstring and a downhole apparatus. The swivel sub includes a first substantially cylindrical body, including a sleeve portion having one or more teeth and a second substantially cylindrical body being partially located within the sleeve portion. The bodies are arranged to rotate relative to each other. The swivel sub also includes a sliding sleeve, having one or more teeth arranged mutually engage with the first teeth is axially moveable between disengaged and engaged positions, in one embodiment by a pressure differential being created in the sub. Further, the present invention provides methods for of running the tool, with particular application to setting and hanging of liners and screens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.