contact Al cohen at 713-480-7777

1. 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
sides.
Approved by:

2. Shackle – Principle
Release Operation
Lock Plate is lifted Main body ROV Grab Ring
(in ”U”position)
Pin is retracted by the Lock Plate
Retraction Wire Spring
loaded Pin
Pin automatically and retained
by the Push Head
Push Head Retraction wire loop
Approved by:

3. ROV Shackle – Principle
Locking Operation
Push Head is forced up
(by entering a lifting ring)
Pin will automatically engage
by spring action
Lock plate pushed down
(”L” position)
Approved by:

4. Locking Operation - Step by step
1 2
Shackle located Link ring
over lifting entered and
sling/ master forcing Push
link Head upwards
3 4
Pin released and Pin fully entered
partly entered and locked (Lock
(link secured from Plate in ”L”pos.
falling out)
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5. Release Operation - Step by step
1 2
Release the load Lift Lock Plate to
on the shackle Unlock pos. ”U”
(remaining weight
of link/slings only)
3 4
Pin retraction Pin fully retracted
by pulliing the and retained,
retraction Wire link free
Approved by:

6. Shackle Pin Lock Indicator
Indicator for Lock Plate
position (in ”L” position)
Pin fully engaged
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7. Stress Analysis Example
ANSYS FEM Von Mises stress at 50Te test load (2x SWL) for 25Te ROV shackle
Fig.1 von Mises stress plot - outer surfaces Fig.2 von Mises stress plot –mid section
Conclution
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.
Approved by:

8. Top Shackle/ Link – clearances/ROV Grab
Ring Access
Stop plates to limit tilting
angle of the shackle
(ensure access to the
ROV Grab Ring)
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9. Available from 6,5 T WLL to 150 T WLL
Approved by: