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US 5,207,534 AGranted
Method for conducting offshore well operations
AssigneeShell Oil Company
InventorsLee K. Brasted, David A. Huete, George Rodenbush
Life of this patent
Estimating the term…
Abstract
A method is disclosed for conducting offshore well operations from an auxiliary vessel in support of a compliant platform. The auxiliary offshore drilling vessel is restrained with respect to the compliant platform in position adjacent the well bay of the compliant platform and vertically aligned with a selected well site for conducting well operations.
Claims44
A method for conducting well operations in support of a compliant platform, comprising:
- positioning a derrick on an offshore drilling vessel substantially over a surface well bay supported by the compliant platform which is in substantially vertical alignment with a well pattern on the ocean floor;
- temporarily restraining the offshore drilling vessel with respect to the compliant platform;
- and
- conducting well operations from the offshore drilling vessel through a substantially vertical drilling riser while the offshore drilling vessel is temporarily restrained with respect to the compliant platform.
1 more element
A method for conducting offshore well operations, comprising:
- positioning a derrick on an offshore drilling vessel in substantially vertical alignment with both a surface well bay supported by a compliant platform and a well pattern on the ocean floor;
- restraining the offshore drilling vessel with respect to the compliant platform;
- conducting well operations from the offshore drilling vessel through a riser;
- and
- disengaging the offshore drilling vessel from restrainment with regard to the compliant platform.
2 more elements
A method for conducting well operations, comprising:
- positioning a non-dedicated auxiliary offshore drilling vessel over a selected well site of a well pattern adjacent a compliant platform;
- restraining the offshore drilling vessel with respect to the compliant platform which is maintained in its normal position in which a surface well bay is presented substantially over the well pattern;
- and
- conducting well operations through a substantially vertical riser using facilities on the offshore drilling vessel.
1 more element
A method for conducting well operations in support of a compliant platform, comprising:
- positioning a derrick on an offshore drilling vessel substantially over a surface well bay on the compliant platform in substantially vertical alignment with a well pattern on the ocean floor;
- temporarily restraining the offshore drilling vessel with respect to the compliant platform;
- conducting well operations from the offshore drilling vessel through a substantially vertical drilling riser;
- and
- disengaging the offshore drilling vessel from restrainment with the compliant platform.
2 more elements
A method for conducting offshore well operations, comprising:
- positioning a derrick on an offshore drilling vessel in substantially vertical alignment with both a surface well bay presented by a compliant platform and a well pattern on the ocean floor;
- temporarily restraining the offshore drilling vessel with respect to the compliant platform;
- and
- conducting well operations from the offshore drilling vessel through a riser while the offshore drilling vessel is restrained with respect to the compliant platform.
1 more element
A method for conducting well operations, comprising:
- positioning a non-dedicated auxiliary offshore drilling vessel in alignment with a selected well site of a well pattern at a base of a compliant platform;
- temporarily restraining the offshore drilling vessel with respect to the compliant platform which is maintained in its normal position in which a surface well bay is presented substantially over the well pattern;
- conducting well operations through a riser using facilities on the offshore drilling vessel while the offshore drilling vessel is temporarily restrained with respect to the compliant platform;
- and
- disengaging the offshore drilling vessel from restrainment with regard to the compliant platform.
2 more elements
A method for conducting well operations in support of a compliant platform, comprising:
- positioning a derrick supported on an offshore drilling vessel substantially over a laterally accessible well bay presented by the compliant platform in substantially vertical alignment with a well pattern on the ocean floor;
- restraining the offshore drilling vessel with respect to the compliant platform;
- and
- conducting well operations from the offshore drilling vessel through a substantially vertical drilling riser.
1 more element
A method for conducting offshore well operations, comprising:
- positioning a derrick supported on an offshore drilling vessel in substantially vertical alignment with both a laterally accessible well bay presented by a compliant platform and a well pattern on the ocean floor;
- restraining the offshore drilling vessel with respect to the compliant platform;
- and
- conducting well operations from the offshore drilling vessel through a riser.
1 more element
A method for conducting well operations, comprising:
- positioning an offshore drilling vessel over a selected well site of a well pattern adjacent a compliant platform;
- restraining the offshore drilling vessel with respect to the compliant platform which is maintained in its normal position substantially over a well pattern;
- and
- conducting well operations through a substantially vertical riser suspended through a laterally accessible surface well bay presented by the compliant platform using facilities on the offshore drilling vessel.
1 more element
Dependencies are inferred from the claim text.