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U.S. Department of Energy
Office of Scientific and Technical Information

Pipelaying in artic offshore waters

Patent ·
OSTI ID:5909569
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-pipe-line 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.
Assignee:
Shell Oil Company
Patent Number(s):
US 4553879
OSTI ID:
5909569
Country of Publication:
United States
Language:
English