Cable Floation Projects
Al Khalij Cable Shore Approach Project
As part of the Al Khalij
oilfield offshore Qatar, Elf Petroleum Qatar (EPQ) required the
installation of a submarine power cable between Halul Island and
the DP1 platform, as well as DP1 platform to the wellhead platform.
Through EPQ’s main contractor, NPCC, HAMSTO was awarded the
contract for the loading, transport and installation of the submarine
cables. All cable operations were undertaken from the DP cable lay
vessel ‘HAM602’. The cables were manufactured by ABB
Norsk Kabel AS, Tongsberg, Norway.
Seaflex Ltd. supplied the patented cable flotation system, SeaSerpent,
for the vessel to beach cable pull-in operation. The SeaSerpent
flexible buoyancy, complete with deployment/recovery system, was
delivered to the vessel ready for immediate use. The complete system
was seafastened in position before the vessel loaded the cable in
Norway.
Once on location the SeaSerpent was successfully used to float the
cable from the HAM602 in to the shallow water with the assistance
of the lay vessel’s MOB boat. Once at the landfall site the
pulling wire was attached to the cable and pull-in operations commenced.
On completion of the pull-in, positioning and controlled lay-down
was executed using SeaSerpent. The cable was positioned above the
trench, running parallel to the pipeline, and by venting of the
buoyancy from the shore end a controlled S-lay was performed.
SEAFLEX EQUIPMENT
Type 2650/6/15 SeaSerpent
- Length : 500m (2 section of 250m)
- Linear Buoyancy : 11kg per metre (cable @ 6.5kg/m)
- Total Buoyancy : 5,500kg
DRS System
Seaflex Ltd. designed and fabricated the DRS (Deployment, Recovery
and Storage) System in-house to the project requirements of the
client. Steel drums with manual brake solution was provided to take
a minimum deck footprint.
More project overview sheets are available from Seaflex, if you have a SeaSerpent requirement or question which is not answered within this section please do not hesitate to contact us using the email link below, or use your browsers 'back' button to return to the general Cable & Pipeline Buoyancy Overview.
Back
to previous page
