Anti-rotation device
US6041859A · kind A · utility
11Cited by
12References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 30, 1997 |
| Grant date | Mar 28, 2000 |
| Priority date | — |
| Expiry date | Dec 30, 2017 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/043
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An anti-rotation device for use with concentric tubing hangers is disclosed. The anti-rotation device can be used as part of the emergency release system that provides for manually releasing and removing the tubing hanger running tool in the event the hydraulic release mechanism fails. The anti-rotation device can be retrofitted into existing tubing hangers without modification to the surrounding casing or spool body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.