Abstract: A semi-submersible drilling vessel has a deckbox structure and a shaker room. A downward sloping mud return line is provided that passes mud from the diverter to the shaker room. In the shaker room there are one or more shale shaker devices, one or more upstream mud tanks arranged to receive gas cut mud from the one or more shale shaker devices, and a vacuum degasser having an inlet pipe extending into an upstream mud tank, a vacuum tank, a vacuum pump, and an outlet, and a degassed mud tank receiving degassed mud from the outlet of the vacuum degasser. The degassed mud tank has an effective height between the bottom thereof to the operational mud level in said degassed mud tank that is greater than the corresponding effective height of said one or more upstream mud tanks. The degassed mud tank is mounted so that—in operation—the operational mud level in said degassed mud tank is at least 1.

Abstract: A pile holding system is to be mounted on a deck of a vessel, e.g. for installation of a pile adapted to support an offshore wind turbine. The pile holding system is configured to support the pile in an upright position at a pile installation location next to the vessel. A vessel is provided with such a pile holder system. A method for installation of a pile and a pile holder are also disclosed.

Abstract: A pile holding system configured to support the pile in an upright position at a pile installation location next to the vessel. The pile holding system includes a pile holder and a pile holder support system. The pile holder support system is configured to be mounted on the deck of the vessel, to moveably support the pile holder, and to move the pile holder in a first direction between an inboard position and an outboard position. The pile holder, when in the outboard position, is located outside the contour of the vessel, for holding the pile in the upright position at the installation location. The pile holder, when in the inboard position with the first and second jaw in the open position, is located within the contour of the vessel.

Abstract: A vessel and method to perform subsea wellbore related operations, e.g. slim hole technique drilling of a subsea wellbore are disclosed. The vessel has a hull with at least one moonpool defining first and second moonpool areas. A vertical tower is mounted on a tower supporting hull structure and has a vertical operative face. A hoisting device has a winch and winch driven cable, and is adapted to suspend a load from said vertical tower via said at least one winch driven cable and to manipulate the suspended load in a firing line of the tower that extends along and outside of said vertical operative face of the tower. The tower is slewable about a vertical slew axis by means of a slewing drive at least into first and second operative positions wherein the firing line extends through the first and second moonpool areas respectively.

Abstract: A marine knuckle boom crane includes a crane housing which is rotational relative to a pedestal about a vertical rotation axis and a knuckle boom assembly attached to the crane housing. The knuckle boom assembly includes a main boom, the inner end of which is connected pivotably about a first horizontal pivot axis to the crane housing; and a jib, the inner end of which is connected pivotably about a second horizontal pivot axis to the outer end of the main boom, wherein the jib is pivotable at least between an extended position in which the tip extends mainly forward from the main boom, and a folded position in which the jib is folded back, essentially parallel along the main boom. In order to position the jib with respect to the main boom, a tensioning member is provided extending between the crane housing and a guide structure connected to the jib.

Abstract: A method for handling of an offshore wind turbine component includes using a vessel having a hull on which a motion compensating crane is mounted. The crane includes a main boom; a main boom luffing assembly; a mobile hoist cable suspension member; and a hoist winch and a hoist cable driven by the hoist winch. An object suspension device is suspended from the hoist cable. The mobile hoist cable suspension member is supported by a motion compensating support device that is fitted to the tip end of the main boom, the motion compensating support device including one or more motor powered motion displacement actuator assemblies and a motion compensating support device controller. The method includes connecting the offshore wind turbine component to the object suspension device; and operating the motion compensating support device to provide motion compensation in at least one direction of the object suspension device and the connected offshore wind turbine component.

Abstract: A radiation facility includes a radiation assembly, preferably for irradiating a patient and, more particularly, to a novel and highly-effective method and apparatus for radiation therapy for patients. The radiation assembly includes a radiation device and a moveable radiation device gantry whereupon the radiation device is mounted. The radiation device includes an accelerator and a projector for irradiating patients. The radiation assembly is movable relative to multiple patient preparation rooms.

Abstract: A hoisting crane for use on an offshore vessel, such a vessel and a method for hoisting an offshore wind turbine component wherein use is made of such a crane and/or vessel. The hoisting crane includes a base structure, a superstructure, a boom having a longitudinal axis and a length of 80-200 meters. The boom includes a proximal portion connected to the boom connection member, formed integral via a joint structure with a single distal leg, wherein the length of the distal leg between the joint and the boom head structure exceeds 30 meters.

Abstract: A power tong includes a lower tong and an upper tong, each with multiple grippers distributed around a tubular passage, for gripping a lower tubular and ripping an upper tubular respectively. A torque actuator includes a first hydraulic drive and a second hydraulic drive, for rotating the upper tong relative to the lower tong. The first hydraulic drive and the second hydraulic drive each have a drive shaft that supports a guide wheel for cooperating with a guide track, and a pinion for cooperating with a rack, which guide wheel and pinion are concentrically, mounted on the drive shaft of the hydraulic drive. The hydraulic drives are mounted with the drive shafts parallel to the main axis, and the upper tong or the lower tong comprises a guide track receiving the guide wheel and a rack cooperating with the pinion.

Abstract: A motion compensating crane for use on an offshore vessel having a hull with a design waterline, wherein the crane includes a revolving superstructure, a main boom mounted to the revolving superstructure and pivotally connected at an inner end thereof about a substantially horizontal boom pivot axis to the revolving superstructure, the main boom having a tip end remote from the inner end, a main boom luffing assembly adapted to set an angle of the main boom relative to the superstructure within a main boom working angle range, a rigid jib frame pivotally connected to the tip end of the main boom about a substantially horizontal jib frame pivot axis, and a level setting assembly adapted to set the rigid jib frame in a levelled position whilst the main boom has an angle within the main boom working angle range. The rigid jib frame is provided with a set of parallel X-direction tracks which are substantially horizontal in the levelled position of the rigid jib frame.

Abstract: An offshore wind turbine installation vessel includes a crane provided with a computerized crane control system. The computerized crane control system is linked to the slew drive, the luffing drive, and the hoisting winch of the crane, and is programmed to perform a foundation pile installation routine providing a coordinated pattern of slew motion of the superstructure and of luffing motion of the boom structure, as well as operation of the hoisting winch so that the load connector of the crane moves from a foundation pile pick up position thereof, where the load connector is connected to the top end of a horizontally oriented foundation pile stored on a storage deck, to a foundation pile overhoarding position thereof, wherein the foundation pile is in vertical suspended from the load connector, outside of the hull.

Abstract: An offshore subsea wellbore activities system and method wherein use is made of a tower and a motion arm assembly with vertical drive adapted to move the motion arm along a vertical motion arm rail relative to the tower. Also use is made of a wellbore activities device comprising a riser tension frame having an upper frame section, a lower frame section provided with a riser attachment device adapted to attach a riser to said lower frame section so as to extend in a firing line, and a vertical riser load bearing structure, e.g. formed by struts. The wellbore activities device further comprises a coiled tubing injector, a wireline lubricator, and one or more pressure control devices associated with the coiled tubing injector and/or the wireline lubricator received by and individually movable within the riser tension frame.

Abstract: A method for handling and/or testing an in-riser landing string assembly onboard a floating vessel, which method comprises the use of an in-riser landing string assembly cart, e.g. a skiddable in-riser landing string assembly cart, having a cart base, e.g. a cart base configured to be skidded over skid rails on a deck of the vessel, and having a support tower erected on said cart base. The in-riser landing string assembly is arranged and retained in vertical orientation on said cart with the support tower providing lateral support for the in-riser landing string assembly, e.g. the in-riser landing string assembly being temporarily secured to the tower at different elevations along the height of the support tower.

Abstract: A method for installation of a pile adapted to support an offshore wind turbine in which the piles are transported horizontally, positioned in a pile holder, rotated to a vertical orientation while being held by the pile holder, and subsequently lowered into the water while being held by the pile holder. The installation vessel is in a floating condition, and the pile holder is compensated for wave-induced motion of the vessel to maintain a predetermined X-Y location independent of the wave-induced motion of the vessel. A pile holding system, a pile holder, and a vessel comprising a pile holding system are also disclosed.

Abstract: An offshore drilling vessel includes a floating hull subjected to heave motion. The hull includes a moonpool and a drilling tower near the moonpool. A drilling tubulars storage rack is provided for storage of drilling tubulars. The vessel includes a heave motion compensation support that is adapted to support a slip device whilst performing heave compensation motion relative to the heaving motion of the vessel. A racking device is provided with a heave motion synchronization system that is adapted to bring a tubular retrieved from the storage rack in heave motion into a vertical motion that is synchronous with the heave compensation motion of the string slip device. The racking device includes vertical rails and at least two separate motion arm assemblies mounted on said vertical rails. Each separate motion arm assembly includes its own vertical drive which is electrically connected to the heave motion synchronization system.

Abstract: The invention relates to a drilling rig comprising: a tubular stand support tower, tubular stand storage rack, slip device for supporting multiple tubular stands, and a tubular stand connecting device. According to the invention the rig is provided with a tubular stand handling system, adapted to move a tubular stand between the storage rack and a position in the firing line above the tubular string slip device, and adapted to rotatable support the tubular stand in the firing line during spinning in, to allow for connecting the tubular stand with the tubular string, and during spinning out, to allow for disconnecting the tubular stand from the tubular string, the tubular stand handling system comprising. The tubular stand handling system comprises vertical rails and a lower motion arm assembly and an upper motion arm assembly comprising grippers, mounted on said vertical rails. Also provided is a weight compensation control system.

Abstract: A crane housing having a substantially cylinder-shaped circumferential wall with a lower section and lower end mounted to a slew bearing of substantially the same diameter includes a boom support structure to support an inner end of a pivotal boom arranged at a front side of the crane housing. The boom support structure includes at least two box elements of each of which an end portion overlaps with and is integrated with the upper section of the circumferential wall. Oblique strengthening ribs are mounted onto and integrated with a side of the circumferential wall and extend from a respective box element end portion in an oblique downwards direction towards the lower end of the wall.

Abstract: A drill rig includes a drilling tower, a drill floor with a well center, a slip device arranged at the well center, a tubulars connection makeup and breaking device, and a top drive system. The top drive system includes a traveling carriage that is vertically mobile along vertical rails of the drilling tower by means of a vertical motion drive. The system also includes a top drive unit supported by the carriage and including a top drive motor and a rotary torque output member. The system further includes a tripping operation elevator adapted to be engaged with the drill string in order to perform tripping operations. The top drive unit and the tripping operation elevator are each mobile relative to the traveling carriage, and the top drive system is provided with actuators adapted to cause the relative motion of the top drive unit and of the tripping operation elevator so as to provide a drilling mode, a tripping mode and bypassing mode.

Abstract: A method for drilling a wellbore, wherein use is made of a top drive device including: multiple electric top drive motors each having a rotor, a transmission to which the rotors of the multiple top drive motors are operatively connected, a rotary stem or quill operatively connected to the transmission allowing the rotary stem or quill to be driven by the top drive motors in order to impart rotary torque to a drilling tubulars string connected to the rotary stem or quill of the top drive device, wherein at least one, preferably each, of the top drive motors has an operable clutch device configured to selectively connect and disconnect upon command the rotor relative to the transmission. The method includes providing a command to the one or more top drive motors having a clutch so as to selectively connect and disconnect the rotor thereof relative to the transmission by operating the clutch.

Abstract: The invention relates to a pile holding system to be mounted on a deck of a vessel, e.g. for installation of a pile adapted to support an offshore wind turbine, which pile holding system is configured to support the pile in an upright position at a pile installation location next to the vessel. The invention furthermore relates to a vessel provided with such a pile holder system, and to a method. The invention furthermore provide a pile holder.