Abstract: A drilling derrick (1) for offshore drilling operations arranged to be a protecting enclosure (3) accommodating a drill pipe device adapted to perform drilling operations and allowing a pipe section to be moved to and from the drilling derrick (1), the drilling derrick (1) accommodating a pipe racking structure for stacking and retaining pipe sections for use in drilling operations, the drilling derrick (1) is adapted to be mounted on a deck (2). The drilling derrick (1) comprising a stressed-skin structure having external load carrying panels (3). The invention also relates to an offshore platform comprising at least one drilling derrick (1).

Abstract: The present embodiments relate to systems for building and/or handling a tubular string of a drilling device. The drilling device comprises a drill floor and a drilling derrick extending from the drill floor. The drill floor has an extension in a first plane (P1) being substantially perpendicular to a first direction (N). The system comprises a suspension device being fixedly attached to the drilling derrick, wherein a projection of the suspension device, in the first direction, onto the first plane (P1), is situated outside the drill floor. The present embodiments also relate to drilling device trolleys arranged to transport a component to and from a drilling center of a drilling device. The present embodiments relate to a use of a drilling device having a drill floor, wherein the drilling device has a suspension device being situated outside the drill floor.

Abstract: The present embodiments relate to systems for building and/or handling a tubular string of a drilling device. The drilling device comprises a drill floor and a drilling derrick extending from the drill floor. The drill floor has an extension in a first plane (P1) being substantially perpendicular to a first direction (N). The system comprises a suspension device being fixedly attached to the drilling derrick, wherein a projection of the suspension device, in the first direction, onto the first plane (P1), is situated outside the drill floor. The present embodiments also relate to drilling device trolleys arranged to transport a component to and from a drilling centre of a drilling device. The present embodiments relate to a use of a drilling device having a drill floor, wherein the drilling device has a suspension device being situated outside the drill floor.

Abstract: A semi-submersible vessel 10 adapted to resist heave motion that includes a plurality of support columns 16, each of which has an upper end 19 and a lower end 23. A deck 39 is interconnected between the plurality of support columns 16 at locations upon the columns 16 proximate the upper ends 19 thereof. The deck 39 is a box-shaped structure. A ring-pontoon 43 is connected to the plurality of support columns 16 at locations proximate the lower ends 23 of each of the columns 16. Each support column 16 has a longitudinal axis 29 that is inclined upwardly and inwardly from the ring-pontoon 43 to the deck 39 and the longitudinal axis is oriented substantially radially from a center point 13 of the vessel 10. An angle of columnar inclination of the support columns 16 approaches at least five degrees from vertical. The ring-pontoon 43 is rectangular-shaped, and in one variation, is substantially square-shaped and has corner pontoon portions 49 interconnected by elongate pontoon portions 56.

Abstract: A method for converting a semi-submersible drilling or accommodation rig into a dynamically positioned vessel in which the rig has pontoon bodies submergible below a surface of a body of water for producing displacement, support columns extending upright from the pontoon bodies and oriented for intersecting the surface of the body of water to define a waterline area for the rig, and a work deck supported on the support columns and arranged to be disposed at a position above the surface of the body of water. The conversion method includes prefabricating a rig extension in which the rig extension has a pontoon body extension, a work deck extension and a supplemental support structure connecting the work deck extension to the pontoon body extension. The rig extension is then connected to the semi-submersible rig at locations proximate one of the pontoon bodies and at the work deck. Thruster(s) may be optionally added at the pontoon body extension.