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US 4,583,881 AGranted
Mobile, offshore, jack-up, marine platform adjustable for sloping sea floor
AssigneeBethlehem Steel Corporation
InventorJames E. Steele
Life of this patent
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Abstract
A mobile, offshore, jack-up, marine platform, adjustable for sloping sea floor having a mat, a multilegged column pivotally connected thereto and a work platform slidably mounted on the column. Means are included for independently vertically adjusting at least one leg and for selectively cantilevering a drilling unit on the work platform, with offset ballasting of the work platform.
Claims14
A mobile, offshore, jack-up, marine platform adjustable for sloping sea floor comprising:
- (a) a mat;
- (b) a tiltable column having a plurality of hollow tubular legs, each leg pivotally attached to the mat;
- (i) means on at least one leg for independently vertically raising and lowering such leg with respect to the mat, to tilt the column;
- (c) a jack-up work platform slidably mounted through its central portion on the column, the work platform having a pair of parallel fixed cantilevered arms extending outwardly from the central portion and a ballastable portion opposite the cantilevered arms;
- (d) a skid unit movably mounted on the cantilevered arms of the work platform;
- and
- (e) a jack-up means interconnected between the work platform and each leg of the column for vertically moving the work platform with respect to the mat.
4 more elements
Dependencies are inferred from the claim text.