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: