Deep water lowering apparatus
US5951227A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1998 |
| Grant date | Sep 14, 1999 |
| Priority date | — |
| Expiry date | Jul 28, 2018 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B19/002
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A deep water lowering apparatus that utilizes dual davit structures mounted on a barge. Each davit structure has a pulling wire rope line spooled on a storage winch. Each pulling line is reeved onto a traction winch and through upper and lower sheaves on the davit structure. Corresponding ends of each pulling line are connected together on an equalizer beam. An adaptor box is suspended from a spreader bar provided with a dog leg center portion for effecting the load transfer from the crane. The lowering tool that supports the load is directly received in the adaptor box and transfers the load to the lowering apparatus without the need for rigging work.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.