Dual activity off-shore drilling rig
US9834998B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 20, 2014 |
| Grant date | Dec 5, 2017 |
| Priority date | — |
| Expiry date | May 20, 2034 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B19/084
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An offshore drilling rig configured for lowering and/or raising a string of tubular equipment into a subsea borehole. The drilling rig includes a drill deck; a first hoisting system being adapted for raising or lowering a first load carrier along a vertical first hoisting axis, wherein the first hoisting system is supported by a first support structure extending upwardly relative to the drill deck; a second hoisting system being adapted for raising or lowering a second load carrier along a vertical second hoisting axis located apart from the first hoisting axis, wherein the second hoisting system is supported by a second support structure extending upwardly relative to the drill deck; and a joint operations well center on the drill deck. During joint operations, the first and second hoisting axes are preferably located apart from the joint operations well center.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.