MECHANICALLY RELEASABLE SHACKLE PIN

• Main Authors: JAMES L. GOLJENBOOM, TIMOTHY A. DUNBAR, TAIT JAMES LANDRY, JACK DARRYL PAYNE, RICHARD JOSEPH ORDOYNE
• Format: Patent
• Language: English
• Published: 29.01.2015
• Subjects: CRANES; HAULING; HOISTING; LIFTING; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS,WINCHES, OR TACKLES; PERFORMING OPERATIONS; TRANSPORTING

A MECHANICALLY RELEASABLE SHACKLE (10) 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 (18, 46) RECEIVED THROUGH BORES AT ONE END OF THE SHACKLE BODY. A SHACKLE NUT (32, 48) 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 (22, 44) IS ATTACHED TO THE SHACKLE BODY. THE ANTI-ROTATION LINK PLATE (22, 44) EXTENDS TO ONE END OF THE SIDE PLATE. THE SHACKLE PIN (18, 46) EXTENDS THROUGH BORES AT ONE END OF THE SHACKLE BODY AND THE AND-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 (32, 48) IS PROVIDED ON THE ANTI-ROTATION LINK PLATE (22, 44) 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 (18, 46) 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.