MULTI-DIRECTION DIRECT CANTILEVER SKIDDING SYSTEM
First Claim
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1. A cantilever skidding system for an offshore drilling system comprising:
- a plurality of aft guides slidably disposed on an aft transverse skidding rail;
a plurality of forward hold down guides slidably disposed on a forward transverse skidding rail;
a plurality of skid driving mechanisms;
a plurality of longitudinal skidding supports slidably attached to a proximate cantilever; and
a plurality of transverse skidding supports slidably attached on the aft and forward transverse skidding rails,wherein the plural aft guides and forward hold down guides accommodate the cantilever and enable the aft and forward transverse rails to support the cantilever, andwherein each of the plurality of the skid driving mechanisms is coupled at one end thereof to one of the plural aft guides or forward hold down guides and coupled at the other end thereof to one of the plural longitudinal or transverse skidding supports to thereby allow both longitudinal and transverse movement of the cantilever.
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Abstract
The present subject matter provides a multi-direction direct cantilever skidding system suitable for an offshore drilling system, where the multi-direction direct cantilever skidding system comprises movable guides accommodating a cantilever of a Jackup drilling unit or other mobile platform and enabling transverse skidding rails to provide direct support for the cantilever so the cantilever may be moved longitudinally and transversely.
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Citations
24 Claims
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1. A cantilever skidding system for an offshore drilling system comprising:
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a plurality of aft guides slidably disposed on an aft transverse skidding rail; a plurality of forward hold down guides slidably disposed on a forward transverse skidding rail; a plurality of skid driving mechanisms; a plurality of longitudinal skidding supports slidably attached to a proximate cantilever; and a plurality of transverse skidding supports slidably attached on the aft and forward transverse skidding rails, wherein the plural aft guides and forward hold down guides accommodate the cantilever and enable the aft and forward transverse rails to support the cantilever, and wherein each of the plurality of the skid driving mechanisms is coupled at one end thereof to one of the plural aft guides or forward hold down guides and coupled at the other end thereof to one of the plural longitudinal or transverse skidding supports to thereby allow both longitudinal and transverse movement of the cantilever. - View Dependent Claims (2, 3, 4, 5)
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6. A drilling rig comprising:
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a rig platform; parallel aft and forward transverse skidding rails each secured on the rig platform; a cantilever skidding system slidably disposed on the parallel transverse skidding rails, the cantilever skidding system comprising; a plurality of aft guides slidably disposed on the aft transverse skidding rail, a plurality of forward hold down guides slidably disposed on the forward transverse skidding rail, a plurality of skid driving mechanisms, a plurality of longitudinal skidding supports slidably attached to the cantilever, and a plurality of transverse skidding supports slidably attached to the aft and forward transverse skidding rails; a cantilever slidably disposed on the transverse skidding rails and slidably engaged by the plurality of aft guides and forward hold down guides; and a drilling floor slidably disposed on the cantilever, wherein the plural aft guides and forward hold down guides accommodate the cantilever and enable the aft and forward transverse rails to support the cantilever, and wherein each of the plurality of the skid driving mechanisms is coupled at one end thereof to one of the plural aft or forward guides and coupled at the other end thereof to one of the plural longitudinal or transverse skidding supports to thereby allow both longitudinal and transverse movement of the cantilever. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An offshore drilling system comprising:
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a Jackup platform with a Jackup deck; and a Jackup drilling unit comprising; parallel aft and forward transverse skidding rails each secured on the Jackup deck; a cantilever skidding system slidably disposed on the parallel transverse skidding rails, the cantilever skidding system comprising; a plurality of aft guides slidably disposed on the aft transverse skidding rail, a plurality of forward hold down guides slidably disposed on the forward transverse skidding rail, a plurality of skid driving mechanisms, a plurality of longitudinal skidding supports slidably attached to the cantilever, and a plurality of transverse skidding supports slidably attached to the aft and forward transverse skidding rails; a cantilever a cantilever slidably disposed on the transverse skidding rails and slidably engaged by the plurality of aft guides and forward hold down guides; and a drilling floor slidably disposed on the cantilever, wherein the plural aft guides and forward hold down guides accommodate the cantilever and enable the aft and forward transverse rails to support the cantilever, and wherein each of the plurality of the skid driving mechanisms is coupled at one end thereof to one of the plural aft or forward guides and coupled at the other end thereof to one of the plural longitudinal or transverse skidding supports to thereby allow both longitudinal and transverse movement of the cantilever. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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Specification