High retraction marine thruster
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Aug 27, 2002
Grant Date -
N/A
app pub date -
Aug 28, 2001
filing date -
Feb 29, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
A floating marine structure, such as a drillship (10 ) includes at least one thruster (14, e.g.) which includes a thruster head (22) having a propeller (102) which is adjustable to vary the angular relation to the drillship hull (11) of the horizontal direction of thrust produced by operation of the thruster. The thruster includes an enclosure (23) above the propeller for a propeller drive motor (49). The thruster has a deployed position in which the propeller (102) is submerged below adjacent exterior surfaces of the hull. The thruster is retractable vertically into the hull to retracted position where the propeller is below the floating waterline (50) of the hull. Further, the thruster has a more elevated service position to which the thruster is movable vertically from its retracted position. At the service position, the propeller (102) is accessible at a location above the floating waterline so that maintenance and repair of the thruster can be performed efficiently and the thruster can be returned quickly to its deployed position.
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