Deepwater subsea lowering/lifting system
US4951924A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 14, 1989 |
| Grant date | Aug 28, 1990 |
| Priority date | — |
| Expiry date | Sep 14, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66D3/006
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Fixed and traveling cable blocks along with first and second cable grip assemblies are supported adjacent the load to be lifted or lowered. A lifting/lowering cable is threaded through the cable grip assemblies before being secured to the load while a separate cable suspends the traveling block from the fixed block. By alternately closing one cable grip and opening the other, the load becomes movable upon the movement of the travelling block. Additionally, by closing the previously opened cable grip and opening the previously closed cable grip, the traveling block may be re-positioned or re-cycled while the load remains stationary. Upon such re-positioning, the lowering/lifting operation of the load can be repeated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.