pipelay solutions - National Oilwell Varco

PIPELAY SOLUTIONS
Downhole Solutions
Tensioner Systems (continued)
Drilling Solutions
Corporate Headquarters
7909 Parkwood Circle Drive
Houston, Texas 77036
United States
Phone: 713 375 3700
Fax: 713 346 7687
Rig Solutions
7 Kirkshaws Road, Coatbridge
Lanarkshire ML5 5 EY
Scotland
United Kingdom
Phone: + 44 0 1236 428774
Fax: 44 0 1236 428166
10000 Richmond Avenue
Houston, Texas 77042
United States
Phone: 713 346 7500
Fax: 713 435 2195
Engineering and Project Management Solutions
Industrial Solutions
Lifting and Handling Solutions
240 East Plato Boulevard
Saint Paul, Minnesota
United States
Phone: 651 293 4646
Fax: 651 293 4648
Production Solutions
Supply Chain Solutions
For a complete list of NOV’s Rig Solutions locations, visit us online:
www.nov.com/RigSolutionsLocations
Tubular and Corrosion Control Solutions
National Oilwell Varco has produced this brochure for general information only, and it is not
intended for design purposes. Although every effort has been made to maintain the accuracy and
reliability of its contents, National Oilwell Varco in no way assumes responsibility for liability for any
loss, damage or injury resulting from the use of information and data herein. All applications for the
material described are at the user’s risk and are the user’s responsibility.
Well Service and Completion Solutions
One Company . . . Unlimited Solutions
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D391005888-MKT-001 Rev. 02
PIPELAY SOLUTIONS
Rigid Solutions
Cable and Flex Lay Solutions
NOV’s line of AmClyde Norson products provide pipelay
systems for rigid and flexible pipes. Each system is
designed to suit the product handling requirements
and the vessel deck area. Pipelay systems can be J-lay
utilizing a tower, S-lay with a stinger or a combination
of both when layed from a ramp at varying angles. The
product can be stored on a reel, in a carousel or as pipe
stalks (lengths) on the vessel deck.
NOV provides lay systems for tube and hose umbilicals,
power cables and other offshore and subsea products.
Each system is designed to suit the product handling
requirements or the lay vessel deck area.
Lay systems can be J-lay utilizing a tower or S-lay with a
stern sheave or over boarding chute. The product can be
stored on a horizontal reel, in a carousel or on a number
of smaller vertical reels used in conjunction with standard
reel drive systems.
Shown on the right is a Pipelay System for rigid steel
pipe with vertical reel, piggyback reel and fleeting ramp.
The ramp is designed to fleet over the width of the reel
allowing product to be spooled on off accurately. The
ramp can operate through 20 - 90° allowing product to
be laid in both shallow and deep water. The ramp and
reel are modular and can be lifted to / from the vessel in
a single lift allowing the complete system to be mobbed /
de-mobbed within 48 hours.
Shown on the right is a Power Cable and Umbilical Lay
System with horizontal reel, fleeting spooling tower,
compensator and deck tensioner.
The fleeting spooling tower allows accurate loading /
unloading of product to and from the reel.
The system shown above has 8” NB pipe on the reel.
The vessel shown on the left has a Pipelay System
for rigid and flexible pipe with horizontal reel, spooling
system and fixed position ramp. The spooling system
maintains the tension at the reel to keep the product
from slackening around the core. A horizontal reel
keeps the lay system C of G low on the vessel allowing
more products to be carried. The system is shown
laying 6” flexible pipe.
Whatever your pipelay requirements, AmClyde Norson
can provide the right solution for you. With many
years’ experience in large turnkey projects we have
the engineering expertise and project management
skills to ensure you get the right equipment on
schedule and within budget. This supported by our
extensive service and after sales network ensures
that you have total confidence in your equipment. We
have successfully supplied equipment and systems
into the pipelay market since 1989. All our equipment
continues to work to this day proving its design and
reliability.
The compensator allows automatic speed matching
between the reel and tensioner without the danger of
system or product overload.
The full equipment spread is modular and can be mobbed/
de-mobbed to/from the vessel within 24/48 hours.
The lay system can be designed to handle standard
offshore products or special one off materials. Capacity
of the system can be tailored to the vessel size or the
installation requirements. Systems can be provided as
modular for vessels of convenience or as permanent
equipment installations. Regenerated power can be
supplied back into the vessels’ power system to reduce
operating costs or burned off on resistor banks.
Power Cable and Umbilical Lay System
Tensioner Systems
Track type tensioners are used to provide the force
needed to move a product from one area to another.
In a product loading system the tensioner is used
to pull the weight of the product from the quayside
onto the vessel storage unit. Whereas, in pipelay
operations tensioners are used to support the
outboard weight of the pipe catenary between the
vessel and the seabed.
Tensioners consist of a number of caterpillar type
track units mounted on a common support structure.
The tracks are powered against the product by
hydraulic cylinders or similar, thus providing the grip
force. The amount of grip force required is dependent
on the friction coefficient between the product and
the pad material on the tracks. The tracks can be
driven by electric or hydraulic motors.
Tensioner System
Tensioner
The Tensioner is mounted on a load measurement system
that provides accurate information on the outboard lay
tension. Typical pipelay systems monitor the outboard
pipe tension as part of the lay process with feedback
going to the lay speed setting or vessel DP system.
Main features include:
• Tensioners are provided in 2, 3 or 4 track formats to
suit project requirements; grip force is provided to
suit a wide range of product applications
• Typical pad material is natural rubber to prevent
product coating damage, however steel can be
provided if required; operating speeds are provided
to suit the lay application
• PLC control of grip force and payout speeds
• Large range of product diameters can be
accommodated
• Grip force and track drive fail safe systems
• Single unit or in-series operational set-up options
• Large range of standard designs available to cover
range of pipe diameters and tension capacity i.e.
1Te to 275Te
• Individual and conceptual designs also available
275Te S-lay tensioner
VLS Tensioner opens to allow product to be removed by crane as shown above
S-lay barge with storage reel, 550Te tension capacity and deployment stinger
J-lay system where pre-welded pipe stalks (lengths) are lifted into the
tower and field welded prior to laying
Tensioner System
Tensioner System
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