Mobile, offshore, self-elevating (jackup) support system with adjustable leg inclination and fixation

Patent · Tue Apr 14 04:00:00 EDT 1987

OSTI ID:6503559

Breedon, J O

This patent describes a marine jack-up platform apparatus with adjustable inclination leg supports comprising: a. a platform providing a deck structure with an upper work area thereon; b. at least three support legs, each movably affixed to the vessel platform at varying elevations so that extension of the legs can elevate the vessel platform above a water surface; c. powered jacking means pivotally mounted on the deck structure in the work area for elevating the vessel platform with respect to the legs; d. adjustable inclination support means including a pivotal connection of the jacking means with the deck structure for forming a structural support between the vessel platform and at least one of the legs at variable angles of the leg inclination when the platform is being supported by the legs; e. including extensible means spaced laterally from the pivot and having a longitudinal axis generally parallel to the leg for elevating one lower edge portion of the jacking means generally opposite the pivotal connection so that an axial load path transfers load between the leg and the platform.

• Assignee: NOV; NOV-87-059021; EDB-87-101347
• Patent Number(s): US 4657437
• OSTI ID: 6503559
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
42 ENGINEERING
420206 -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
423000 -- Engineering-- Marine Engineering-- (1980-)
CONDUCTOR DEVICES
CONNECTORS
DESIGN
ELECTRICAL EQUIPMENT
EMPLACEMENT
EQUIPMENT
INCIDENCE ANGLE
INCLINATION
MECHANICAL STRUCTURES
MOORINGS
NATURAL GAS WELLS
OFFSHORE PLATFORMS
OIL WELLS
POSITIONING
SPACE DEPENDENCE
SUPPORTS
WELLS