Cable Landings
MariPro
has been responsible for landing of cable systems using a
variety of technologies. These range from standard trenched
approaches with heavy armor or split-pipe to innovative use
of drill-pipe or existing oil or gas lines, and horizontal
directional drilling.
Cable Crossings
L-3 MariPro
developed the procedures and performed 123 cable crossings
of pipelines and cables during the installation of 850 kilometers
of fiber-optic telecommunication cables linking 7 oil platforms
in the Gulf of Mexico. In order to protect and separate
the cables from the pipelines, a very high density polyurethane
segmented covering was applied to the fiber-optic cables
as they were deployed over the pipelines
Shore
Landings
MariPro
pioneered the application of split-pipe on the system cable
aboard the installation vessel while deploying cable and
floating it to shore. This methodology precludes the need
for a near-shore joint or splice; decreasing installation
time, risk and cost. L-3 MariPro has also successfully utilized
reconditioned oil drill-pipe assembled on shipboard or shore
side and pulled or floated into position for a number of
installations. Further, L-3 MariPro has installed cables
in abandoned gas pipelines. On the first such project 16
km of cable was successfully installed in two different pipelines
(8 km per pipe).
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Shore
landing split-pipe
Chile 2003 |
Shore
landing split-pipe
Indian Ocean 2000 |
Shore
landing directional drilling
Wake 2007 |
Horizontal
Directional Drilling
Horizontal
directional drilling (HDD), or directional boring, provides
a trenchless method of installing conduits from shore to
off-shore. The system cable is then pulled through
the conduit to shore for connection to the system’s
on-shore equipment. HDD is used when trenching or excavation
is not practical or environmentally desirable. HDD
is often the preferred method for landing submarine cables
onto shore.
L-3 MariPro
often works with our customers and qualified HDD suppliers
to oversee the shore landing process to insure overall marine
installation and project success of the cabled undersea sensor
system.
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Example
of HDD in progress |
Ditch
Winch used in Directional Drilling |
Offshore
Platform Cable Landings
L-3 MariPro
has experience in offshore platform cable landings in water
depths from 60 to 300 meters. L-3 MariPro has developed
a unique offshore platform cable landing procedure that conforms
to API standards utilizing standard platform cable landing
hardware such as J-Tube cable riser systems combined with
novel underwater cable storage bins and shipboard deployment
rigging.
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Tube
Construction and installation of Platform Landing |
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Sea
Floor Tube Turn J Tube Section |
Design
and Fabrication Straight Four Cable J Tube Section |
Lower
Trumpet Section |
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