Abstract: A subsea equipment operations arrangement for an offshore platform or vessel includes a working deck with an opening to allow passage of subsea operation equipment to and from a position below the working deck, a lifting structure positioned above the opening to lift and handle heavy subsea operation equipment through the opening, and a system for transporting the heavy equipment laterally over the working deck to and from the opening. The system includes a rail structure on the working deck that supports and guides a movable carrier configured to carry the heavy equipment. The opening extends in a lateral direction from a lifting position below the lifting structure to a point aside the lifting position. A first deck section is movably arranged in the opening, covers a portion of the opening, and includes rail members.

Abstract: A mooring system comprising a first and a second object, wherein at least said first object is floating, and wherein said mooring system further comprises a hawser with a first end adapted to be attached to said first object, and a second end adapted to be attached to said second object, wherein the hawser comprises at least two rope segments with an intermediate chafing member arranged between the at least two rope segments, wherein the intermediate chafing member runs via a fairlead and said fairlead is adapted to be arranged adjacent a side of said first object facing the second object and said first end being attached to an attachment point of said first object, which attachment point being distanced to said fairlead.

Abstract: A semi-submersible offshore platform comprises a main structure comprising two longitudinal lower side beam structures, two transverse lower side beam structures and four columns, the longitudinal and transverse lower side beam structures are located between the four columns connecting the four columns with each other such that the semi-submersible offshore platform exhibits a frame shaped submersible pontoon having a lower central opening the four columns extends upwards from the frame shaped submersible pontoon. The main structure of the semi-submersible offshore platform comprises two longitudinal upper side beam structures and two transverse upper side beam structures, the longitudinal and transverse upper side beam structures are located between the four columns connecting the four columns with each other such that the semi-submersible offshore platform exhibits a frame shaped deck box structure having an upper central opening for receiving at least one structural module.

Abstract: A semi-submersible offshore platform comprises a main structure comprising two longitudinal lower side beam structures, two transverse lower side beam structures and four columns, the longitudinal and transverse lower side beam structures are located between the four columns connecting the four columns with each other such that the semi-submersible offshore platform exhibits a frame shaped submersible pontoon having a lower central opening the four columns extends upwards from the frame shaped submersible pontoon. The main structure of the semi-submersible offshore platform comprises two longitudinal upper side beam structures and two transverse upper side beam structures, the longitudinal and transverse upper side beam structures are to located between the four columns connecting the four columns with each other such that the semi-submersible offshore platform exhibits a frame shaped deck box structure having an upper central opening for receiving at least one structural module.

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).