Pipelaying in artic offshore waters
US4553879A · kind A · utility
9Cited by
14References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 24, 1984 |
| Grant date | Nov 19, 1985 |
| Priority date | — |
| Expiry date | Apr 24, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L1/168
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention provides a method and apparatus for constructing pipelines in Arctic offshore waters by a directional drilling technique, thereby minimizing exposure to ice gouging and eliminating the hazards associated with unstable permafrost. A special drilling-pipeline construction vessel is also provided which has a conical shape with reinforced outer walls to resist ice forces, which vessel includes means to install deep underground pipeline segments and means to connect and protect the pipe ends.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.