Mobile, offshore, jack-up, marine platform adjustable for sloping sea floor
First Claim
Patent Images
1. A mobile, offshore, jack-up marine platform adjustable for sloping sea floor comprising:
- (a) a mat;
(b) a tiltable column formed from 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;
(d) 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;
each jack-up means including;
(i) a first and second vertically spaced pair of pin boxes spanning a portion of each leg;
(ii) a plurality of vertically-oriented piston and cylinder assemblies located on each side of said leg column for interconnecting said first and second pairs of pin boxes; and
(iii) each pin box carrying a plurality of vertically spaced, horizontally-oriented piston and cylinder assemblies, each of which serves to selectively engage every alternately vertically-spaced aperture in the leg with a reciprocating anchor pin.
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Accused Products
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/or offset ballasting of the work platform.
28 Citations
20 Claims
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1. A mobile, offshore, jack-up marine platform adjustable for sloping sea floor comprising:
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(a) a mat; (b) a tiltable column formed from 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; (d) 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;
each jack-up means including;(i) a first and second vertically spaced pair of pin boxes spanning a portion of each leg; (ii) a plurality of vertically-oriented piston and cylinder assemblies located on each side of said leg column for interconnecting said first and second pairs of pin boxes; and (iii) each pin box carrying a plurality of vertically spaced, horizontally-oriented piston and cylinder assemblies, each of which serves to selectively engage every alternately vertically-spaced aperture in the leg with a reciprocating anchor pin. - View Dependent Claims (2, 3, 4, 10, 11)
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5. A mobile, offshore, jack-up, marine platform adjustable for sloping sea floor comprising:
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(a) a mat; (b) a tiltable column formed from 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 including an end portion extending outwardly from the central portion and a ballastable portion opposite the end portion; (d) a skid unit movably mounted on the end portion 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;
each jack-up means including;(i) a first and second vertically spaced pair of pin boxes spanning a portion of each leg; (ii) a plurality of vertically-oriented piston and cylinder assemblies located on each side of said leg for interconnecting said first and second pair of pin boxes; and (iii) each pin box carrying a plurality of verticall-spaced, horizontally-oriented piston and cylinder assemblies, each of which serves to selectively engage every alternately vertically-spaced aperture in the leg with a reciprocating anchor pin. - View Dependent Claims (6, 7, 8, 9, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification