Heave compensator

A method and device for withdrawing an element fastened to a mobile installation (1) while compensating for the movements of this installation, comprises at least one actuating cylinder (21, 22), at least one accumulator (26) and several pulleys (12, 13, 14, 16), arranged so that the mechanical and...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	MICHEL CHATARD
Format:	Patent
Sprache:	eng
Schlagworte:	CAPSTANS CRANES EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS HAULING HOISTING HOISTS LIFTING LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS,WINCHES, OR TACKLES MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PERFORMING OPERATIONS TACKLES, e.g. PULLEY BLOCKS TRANSPORTING WINCHES
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Beschreibung
Zusammenfassung:	A method and device for withdrawing an element fastened to a mobile installation (1) while compensating for the movements of this installation, comprises at least one actuating cylinder (21, 22), at least one accumulator (26) and several pulleys (12, 13, 14, 16), arranged so that the mechanical and oloepneumatic forces are substantially equal. The pulleys are mounted on levers (19, 23, 24, 25) and a cable passes from a winch (7) over the pulleys to a fixed anchorage (8). The cable extends over a block (4) which is immobile with respect to the sea bed 5 and a movable block located between the pulleys.