Sub-marine pipe rising/lowering device for use with lay barge, has locking device for locking chain in lower part of tower and another locking device is in open position when mobile carriage is raised

摘要

#CMT# #/CMT# The device has an abandon chain (9) fixed at an upper end of a pipe extending until a mobile carriage (5) by passing around a guiding unit, where the carriage has a locking device (7). The guiding unit guides a pulley (5-1) integrated to the carriage. Another blocking device (8) is mounted on a lower end of a tower (3). The device (7) locks the chain and the device (8) is in open position when the carriage is lowered. The device (8) locks the chain in lower part of the tower and the device (7) is in open position when the carriage is raised. #CMT# : #/CMT# An independent claim is also included for a method for lowering a sub-marine pipe until a bottom of the sea from a lay barge. #CMT#USE : #/CMT# Device for rising or lowering a sub-marine pipe between a lay barge and a bottom of sea. #CMT#ADVANTAGE : #/CMT# The configuration of the device minimizes the encumbrance of a deck or hold of the barge by directly storing the chain on the lay barge. The device is inexpensive, and facilitates the rising/lowering the pipe between the lay barge and the bottom of sea having depth greater than 1000m. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a rear side view of a lay barge with a rising/lowering device comprising a chain supporting tension during lowering. 3 : Tower 5 : Mobile carriage 5-1 : Free pulley 7, 8 : Locking devices 9 : Abandon chain.