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Method of launching long pipelines and retrieving support means therefor

Patent ·
OSTI ID:6384135
;
This patent describes a method of launching a pipeline from an on-shore site into a body of water, the method comprising the steps of: supporting the pipeline at the on-shore site with ground engaging movable support means spaced along a length of the pipe. The support means being connected together by a support connecting line; providing floats, one of the floats being attached to each of the support means, each of the floats having a buoyancy greater than a combined weight of the float plus the support means to which it is attached, so that the support means will float after it is disengaged from the pipeline; positioning a launch vessel to a seaward end of the pipelines; positioning an intermediate floating vessel offshore from the site, deploying a main launching line seaward from a seaward end of the intermediate floating vessel, and providing sufficient buoyancy means to hold such main launching line above the floor of the body of water; connecting a pipeline launch line between a landward end of the intermediate floating vessel and the seaward end of the pipeline; connecting a support means launch line between the landward end of the intermediate floating vessel and the seaward end of the support connecting line; connecting a seaward end of the main launch line to the launch vessel.
Assignee:
Conoco Inc., Ponca City, OK
Patent Number(s):
US 4786207
OSTI ID:
6384135
Country of Publication:
United States
Language:
English

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Related Subjects

02 PETROLEUM
022000* -- Petroleum-- Transport
Handling
& Storage
03 NATURAL GAS
032000 -- Natural Gas-- Transport
Handling
& Storage
42 ENGINEERING
423000 -- Engineering-- Marine Engineering-- (1980-)
ENERGY SOURCES
EQUIPMENT
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
INSTALLATION
MARITIME TRANSPORT
MATERIALS HANDLING
MATERIALS HANDLING EQUIPMENT
MECHANICAL STRUCTURES
NATURAL GAS
OFFSHORE SITES
ONSHORE SITES
PETROLEUM
PIPELINES
SEAS
SHIPS
SUPPORTS
SURFACE WATERS
TRANSPORT