System and method for supporting a riser
AssigneeMaersk Drilling A/S
InventorNikolaj Golovinskij
Life of this patent
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Abstract
A support system (12; 12′) for providing horizontal support to a riser (32) extending downward from a cantilever (18) along a well centre and into a body of water comprising a riser interface (48; 48′) and a tether arrangement (50; 50′). The support system (12; 12′) is configured to permit asymmetric placement of the riser interface (48; 48′) relative to the cantilever (18).
Claims18
A support system for providing horizontal support to a riser extending downward from a drilling cantilever comprising a drilling floor defining a well centre and into a body of water, the support system comprising:
- a riser interface defining a vertical opening for receiving the riser;
- and
- a tether arrangement comprising a plurality of tethers for tethering the riser interface to the drilling cantilever,
- the tether arrangement configured to permit displacement of the riser interface in the X and Y directions of the drilling cantilever,
- wherein the well centre may be different from a centre axis of the cantilever and the support system is mounted to the drilling cantilever and configured to permit asymmetric placement of the riser interface relative to the drilling cantilever.
A bottom supported offshore drilling platform comprising a support system for providing horizontal support to a riser extending downward from a drilling cantilever of the offshore platform along a well centre and into a body of water, said drilling cantilever comprising a drilling floor defining the well centre, the support system comprising:
- a riser interface defining a vertical opening for receiving the riser;
- and
- a tether arrangement comprising a plurality of tethers for tethering the riser interface to a connector arrangement on the drilling cantilever,
- the tether arrangement configured to permit displacement of the riser interface in the X and Y directions of the drilling cantilever,
- wherein the well centre may be off a centre axis of the drilling cantilever and the support system is mounted to said drilling cantilever and configured to provide tensile support to the riser and permit asymmetric placement of the riser interface relative to the drilling cantilever.
A method for supporting a riser using a support system for providing horizontal support to the riser extending downward from a drilling cantilever of an offshore platform along a well centre and into a body of water, said drilling cantilever comprising a drilling floor defining the well centre, the support system comprising:
- a riser interface defining a vertical opening for receiving the riser;
- and
- a tether arrangement comprising a plurality of tethers for tethering the riser interface to a connector arrangement on the drilling cantilever,
- the tether arrangement configured to permit displacement of the riser interface in the X and Y directions of the drilling cantilever,
- wherein the well centre may be off a centre axis of the drilling cantilever and the support system is mounted to said drilling cantilever and configured to provide tensile support to the riser and permit asymmetric placement of the riser interface relative to the drilling cantilever.
Dependencies are inferred from the claim text.