Offshore drilling system comprising a drilling tower (10), a tubular string hoisting device with a crown block (23) and a travelling block (24) suspended from said crown block in a multiple fall arrangement, a heave compensation system adapted to provide heave compensation of the travelling block (24). The heave compensation system comprises a hydraulic sheave compensator (32, 33). The system further comprises a mobile working deck (70) which is movable with respect to the drilling tower (10) within a motion range including a heave compensation motion range (72). The heave compensation system is further adapted to provide heave compensation of the mobile working deck (70) by a hydraulic deck compensator (60), which is hydraulically connected via a hydraulic conduit (65,66) to the hydraulic sheave compensator (32, 33), such that in operation the deck compensator (60) moves synchronously with the sheave compensator (32, 33) of the heave compensation system.
OFFSHORE DRILLING SYSTEM, VESSEL AND METHOD
OFFSHORE-BOHRSYSTEM, SCHIFF UND VERFAHREN
SYSTÈME DE FORAGE EN MER, RÉCIPIENT ET PROCÉDÉ
2021-04-21
Patent
Electronic Resource
English