Inventors:
Jack Darryl Payne - Spring TX, US
Tait James Landry - Thibodaux LA, US
James L. Goljenboom - Kenner LA, US
Richard Joseph Ordoyne - Ocean Springs MS, US
Timothy A. Dunbar - Houma LA, US
Assignee:
J. Ray McDermott, S.A. - Houston TX
International Classification:
B66C 1/34
F16G 15/06
US Classification:
59 86, 403324, 294 821, 294 8235
Abstract:
A mechanically releasable shackle pin arrangement that is readily operated by an ROV and is not affected by the hydrostatic pressures encountered at depth. A shackle body having two ends has a shackle pin received through bores at one end of the shackle body. A shackle nut threaded on the shackle pin secures the shackle pin in an installed position through the bores in the shackle body. An anti-rotation link plate is attached to the shackle body. The anti-rotation link plate extends to one end of the side plate. The shackle pin extends through bores at one end of the shackle body and the anti-rotation link plate and is secured in its installed position by a shackle nut threaded on the shackle pin. Means for preventing rotation of the shackle nut and loss of the shackle nut is provided on the anti-rotation link plate such that the shackle pin can be removed by a remotely operated tool on an ROV at depth to release a load without the need for hydraulics on the shackle assembly. The shackle pin is provided with a special plate arrangement designed to allow the shackle pin to be gripped and rotated by a remotely operated tool on an ROV.