Arrangement for raising and lowering a floating offshore platform

Patent · Tue Aug 23 00:00:00 EDT 1983

OSTI ID:5675199

Lietzke, H; Mayr, H K

An arrangement is disclosed for raising and lowering a floating offshore platform having legs which are movable relative to the platform. The legs, in the operating condition, are supported on the bottom of the sea, and a jacking device is blocked against downward movement whenever the floating platform is at a highest point of sea wave motion in a touched-down position of the legs. The jack device may be in the form of rope winches, with the drive of one jacking device being switched off the rope winch of the other jacking device being released in take-up direction, while being blocked in payout direction in touched-down position of the legs.

• Assignee: Deutsche Babcock Aktiengesellschaft (Germany, Federal Republic of); Schiess-Defries Hebezeug-und Transporteinrichtungen GMBH (Germany, Federal Republic of)
• Patent Number(s): US 4400111
• OSTI ID: 5675199
• Resource Relation: Patent File Date: Filed date 27 Feb 1981; Other Information: PAT-APPL-239117
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
OFFSHORE PLATFORMS
POSITIONING
OFFSHORE DRILLING
OFFSHORE OPERATIONS
OIL WELLS
SUPPORTS
DRILLING
MECHANICAL STRUCTURES
WELLS
020300* - Petroleum- Drilling & Production