Marine riser protector for use on offshore oil drilling rigs in icy waters
US4505618A · kind A · utility
11Cited by
6References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 29, 1983 |
| Grant date | Mar 19, 1985 |
| Priority date | — |
| Expiry date | Apr 29, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63B2211/06
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An apparatus for protecting a marine riser extending downwardly from a platform of an offshore station above a sea level toward a sea bottom. A tubular protector is removably mounted on the underside of the platform in surrounding relation to the marine riser in the vicinity of the sea level. According to another embodiment, a tubular protector has an upper portion in the shape of a truncated cone for contact with ice floes and a lower portion shaped as a grid-like truncated cone flaring downwardly for diverting ice floes away from the tubular protector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.