Operated Shackle
For safe and efficient
subsea connection
The grab ring allow the
shackle to be handled by the
ROV manipulator arm–
providing access from all
Approved by:
providing access from all
sides.
Shackle Shackle –– Principle Principle
Release OperationRelease Operation
Lock Plate is lifted
(in ”U”position)
Pin is retracted by the
Retraction WireLock Plate
ROV Grab RingMain body
Approved by:
Retraction Wire
Pin automatically and retained
by the Push Head
Push Head
Spring
loaded Pin
Retraction wire loop
ROV Shackle ROV Shackle –– Principle Principle
Locking OperationLocking Operation
Push Head is forced up
(by entering a lifting ring)
Pin will automatically engage
by spring action
Approved by:
by spring action
Lock plate pushed down
(”L” position)
1
Locking Operation Locking Operation -- Step by step Step by step
Shackle located
over lifting
sling/ master
link
Link ring
entered and
forcing Push
Head upwards
2
Approved by:
Pin released and
partly entered
(link secured from
falling out)
Pin fully entered
and locked (Lock
Plate in ”L”pos.
3 4
1
Release Operation Release Operation -- Step by step Step by step
Release the load
on the shackle
(remaining weight
of link/slings only)
Lift Lock Plate to
Unlock pos. ”U”
2
Approved by:
Pin retraction
by pulliing the
retraction Wire
Pin fully retracted
and retained,
link free
3 4
Shackle Pin Lock Indicator Shackle Pin Lock Indicator
Indicator for Lock Plate
position (in ”L” position)
Pin fully engaged
Approved by:
Stress Analysis ExampleStress Analysis ExampleANSYS FEM Von ANSYS FEM Von MisesMises stress at 50Te test load (2x SWL) for 25Te ROV shacklestress at 50Te test load (2x SWL) for 25Te ROV shackle
Approved by:
Pin:Highest stress abt. 705 Mpa at testing (uses standard 25T shackle pin material)
Main body: Stresses are generally low; max. Abt 325 Mpa at test load.
Fig.1 von Mises stress plot - outer surfaces Fig.2 von Mises stress plot –mid section
Conclution
Top Shackle/ Link Top Shackle/ Link –– clearances/ROV Grab clearances/ROV Grab
Ring AccessRing Access
Stop plates to limit tilting
angle of the shackle
(ensure access to the
ROV Grab Ring)
Approved by:
AvailableAvailable from 6,5 T WLL to 150 T WLLfrom 6,5 T WLL to 150 T WLL
Approved by:
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