Guiding and positioning device for the block and hook of a derrick on a ship
US3955798A · kind A · utility
3Cited by
6References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 28, 1973 |
| Grant date | May 11, 1976 |
| Priority date | — |
| Expiry date | Nov 28, 1993 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B19/02
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Improved guiding and positioning device for the block and hook of a derrick installed on board a ship, enabling dual speed boring, which, as an assembly formed by the block and the hook, is connected to a carriage sliding on two rails parallel to the axis of the well by two indentical mechanisms ensuring horizontal linear movement of the block and the hook.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.