Abstract: A crane with a pivotal boom. The crane has a first and a second main hoisting system, which main hoisting system are configured for independent operation. Each system comprises a hoisting cable, an upper sheave block, a hoisting block assembly suspended from the upper sheave block by the hoisting cable in a multiple fall configuration, and a hoisting winch. The upper sheave blocks of the first and second main hoisting systems are each independently pivotable about a common pivot axis relative to the boom. Each hoisting block assembly comprises a hoisting block body, multiple fixed sheaves that are fixed on the hoisting block body, and multiple disconnectable sheave members, each disconnectable sheave member comprising a frame and at least one sheave rotatably supported by the frame.

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: The present invention relates to a tubular product clamp for supporting a tubular product, e.g. a drilling pipe, in a firing line of a drilling rig, and a method for supporting a tubular product in a firing line. The clamp comprises multiple clamping devices with a base part and a clamp part. According to the invention, an insert carrier is provided for each clamp part. The insert carriers each have an insert carrier body with one or more recesses for holding one or more inserts for engaging the tubular product supported by the product clamp.

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: The invention relates to a tubular product clamp for clamping a tubular product, such as a drilling pipe, and to thus support for example a string of drilling pipes. The product clamp has a ring frame and three or more clamping devices mounted along the inside of that ring frame and around a central product passage. According to the invention each clamping device comprises a base part and a clamp part and two load transfer rollers carried by a trolley frame. The trolley frame positions the base part, the clamp part and the load transfer rollers relative to each other. The base part and clamp part define between them a track, along which the load transfer rollers roll when the clamp part is moved relative to the base part.

Abstract: The present invention relates to a tubular product clamp for supporting a tubular product, e.g. a drilling pipe, in a firing line of a drilling rig, and a method for supporting a tubular product in a firing line. The clamp comprises multiple clamping devices with a base part and a clamppart. According to the invention, an insert carrier is provided for each clamp part. The insert carriers each have an insert carrier body with one or more recesses for holding one or more inserts for engaging the tubular product supported by the product clamp.

Abstract: The invention relates to a tubular product clamp for clamping a tubular product, such as a drilling pipe, and to thus support for example a string of drilling pipes. The product clamp has a ring frame and three or more clamping devices mounted along the inside of that ring frame and around a central product passage. According to the invention each clamping device comprises a base part and a clamp part and two load transfer rollers carried by a trolley frame. The trolley frame positions the base part, the clamp part and the load transfer rollers relative to each other. The base part and clamp part define between them a track, along which the load transfer rollers roll when the clamp part is moved relative to the base part.

Abstract: A crane vessel including a revolving hoist crane and a method of using such a vessel are provided. The hoist crane includes a jib, main hoisting means and auxiliary hoisting means for raising and lowering a load. The main hoisting means include a main hoisting tackle with a main hoist upper block connected to the jib and a main hoist lower block. The main hoist lower block is assembled from a sheave block including the sheaves of the main hoist lower block and a load attachment assembly having the lowering weight and the main load attachment device. The crane vessel is provided with a load attachment assembly storage device for storage of the disassembled load attachment assembly and displacement means capable of engaging with and displacing the load attachment assembly while it is assembled to the sheave block and when the jib is supported by a jib rest.

Abstract: An offshore wind turbine installation vessel, wherein the wind turbine is of the type to be installed on a foundation that is installed on the seabed prior to the installation of the wind turbine on the foundation, wherein the wind turbine is of the type with a vertical mast to be fitted with its lower end onto the foundation, wherein the vessel includes a non-jack-up type floating hull; and a crane structure extending upward from said hull. The crane structure is provided with a hoisting device having one or more wind turbine suspension elements and a wind turbine engagement device supported by the suspension elements and adapted to engage with said wind turbine. The hoisting device is adapted to support and to raise and lower in controllable manner at least the mast of the wind turbine while in vertical orientation.

Abstract: An offshore wind turbine installation vessel, wherein the wind turbine is of the type to be installed on a foundation that is installed on the seabed prior to the installation of the wind turbine on the foundation, wherein the wind turbine is of the type with a vertical mast to be fitted with its lower end onto the foundation, wherein the vessel includes a non-jack-up type floating hull; and a crane structure extending upward from said hull. The crane structure is provided with a hoisting device having one or more wind turbine suspension elements and a wind turbine engagement device supported by the suspension elements and adapted to engage with said wind turbine. The hoisting device is adapted to support and to raise and lower in controllable manner at least the mast of the wind turbine while in vertical orientation.

Abstract: This invention relates to a crane vessel (1, 100) comprising a revolving hoist crane (20, 120) and a method of using such a vessel. The hoist crane comprises a jib (24, 124), main hoisting means and auxiliary hoisting means for raising and lowering a load. The main hoisting means comprise a main hoisting tackle (3, 130) with a main hoist upper block (38, 138) connected to the jib of the hoist crane and a main hoist lower block (39, 139). The vessel comprises a jib rest (10, 110) for supporting the jib when the crane is not in operation. According to the invention the main hoist lower block is assembled from a sheave block (163) comprising the sheaves (132) of the main hoist lower block and a load attachment assembly (133) comprising the lowering weight (137) and the main load attachment device (34, 134).