Method and apparatus for quickly erecting off-shore platforms
US4041711A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 23, 1976 |
| Grant date | Aug 16, 1977 |
| Priority date | — |
| Expiry date | Jan 23, 1996 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02B2017/006
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Method and apparatus for elevating an off-shore well drilling or other platform on a support structure in a minimum of time with maximum safety. The platforms are elevated on one or more caissons, utilizing one or more jacking units. One type of support structure comprises three caissons arranged as a tripod. The platform to be mounted thereon has three open caisson wells and is floated into position, with one caisson received in each well. A caisson locking gate is closed to hold the platform in place. A pre-set-up jacking unit is located near or straddles each caisson well. Each jacking unit includes a jacking head, one or more jacking legs pivotally connected at their upper end to the jacking head, and a jacking mechanism surrounding each jacking leg and connected by a gimbal joint at its lower end to the platform. A stabilizing frame for each jacking unit is mounted on the platform. Trolleys mounted on the opposite sides of the frame, pulleys and tensioned cables initially hold the jacking head centered in the frame. Additional cables hold the jacking head suspended above the upper end of its associated caisson, ready to be lowered onto the caisson to immediately commence the p…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.