Multi-activity offshore exploration and/or development drill method and apparatus
Patent 6085851 Issued on July 11, 2000. Estimated Expiration Date: 
May 3, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 3, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorsAssigneeApplicationNo. 642417 filed on 05/03/1996US Classes:175/7, Boring from floating support with submerged independent anchored guide base405/195.1MARINE STRUCTURE OR FABRICATION THEREOFExaminersPrimary: Bagnell, DavidAttorney, Agent or FirmForeign Patent References
International ClassesE21B 015/02B63B 035/44 AbstractA multi-activity driliship, or the like, method and apparatus having a single derrick and multiple tubular activity stations within the derrick wherein primary drilling activity may be conducted from the derrick and simultaneously auxiliary drilling activity may be conducted from the same derrick to reduce the length of the primary drilling activity critical path.Other References
Field of SearchBORING A SUBMERGED FORMATIONBoring with underwater tool drive prime mover Boring from floating support with submerged independent anchored guide base Boring from submerged buoyant support Boring from nonbuoyant support MARINE STRUCTURE OR FABRICATION THEREOF With anchoring of structure to marine floor Tension leg platform | |
