Provided is a modular tool for installing a platform into a tower section of a wind turbine tower, comprising a first body element, a second body element, wherein each body element has a first base plate, on which the tower section rests in use of the modular tool, and a second base plate, which rests on a foundation in use of the modular tool, wherein the base plates are spaced apart from each other and are arranged parallel to each other, and at least one connecting beam that detachable connects the body elements to each other and that defines a width of a gap between the body elements. Due to the fact that the at least one connecting beam detachable connects the body elements to each other, the modular tool can be easily adapted to different tower diameters by replacing the at least one connecting beam.

This application concerns a frame for a pump package for connecting to a liquid storage tank, the frame comprising a mounting frame portion and a transport frame portion. The mounting frame portion has an installation side for securing the mounting frame portion to the outside of a liquid storage tank and a mounting side for securing a pump package to the mounting frame portion. The transport frame portion has one or more lifting points for lifting the pump package when secured to the mounting frame portion. Together, the mounting frame portion and the transport frame portion form an enclosed space for containing the pump package when the mounting frame portion and the transport frame portion are attached.

A repair system for a gearbox of a wind turbine includes for removably coupling to the first portion of the gearbox housing of the gearbox. The lifting apparatus is adapted for lifting the first portion of the gearbox housing relative to the second portion gearbox housing. The repair system also includes at least one gearbox housing support member for mounting to the second portion of the gearbox housing. The at least one gearbox housing support member provides a support surface for the first portion of the gearbox housing during a repair procedure of the gearbox. The support surface is offset from the second portion of the gearbox housing.

A method for mounting or dismounting a wind turbine component of an energy generating unit in a multirotor wind turbine is disclosed. The multirotor wind turbine comprises a tower configured to support one or more load carrying structures each arranged for supporting at least two energy generating units arranged at or near its ends and at opposite sides of the tower. The method comprises positioning or dispositioning a first wind turbine component at a first end of the load carrying structure, yawing the load carrying structure approximately 180 degrees, and positioning or dispositioning a second wind turbine component at the second end of the load carrying structure opposite the first end. The method may be used in erecting or servicing a multirotor wind turbine.

An offshore platform device comprising a platform and a docking device which has a vertically oriented longitudinal axis (L) and is designed to be raised along its longitudinal axis (L) relative to the platform (3) into a transport position and to be lowered into an operational position, the docking device (4) having at its lower end at least one docking point (8a, 8b, 8c, 8d) which is accessible from a boat (11) in the operational position.

A system for enabling servicing of a rotor of a wind turbine has a rotor blade sling with at least one strap configured to be placed over the top of a rotor blade in a ten o'clock position or a two o'clock position. One or more rigid bars extend from the hub and out away from the hub, and the one or more rigid bars are coupled to the at least one strap. One or more support straps are coupled to the at least one strap, and the one or more support straps are configured to couple and support a rotor blade in a six o'clock position.

A system for assembling/disassembling a windmill in a supporting tower, comprising a intermediate fixing structure with hydraulic supports for attachment, by pressure, to the tower; a main structure capable of being attached to the tower at various working positions by absorbing the diametral differences of the latter; two pivoting arms hinged to the main structure and capable of being positioned by hydraulic actuators; a secondary structure for hoisting tower segments, equipped with four cranes of a minor size for handling the main structure and the pivoting arms during hoisting/descent, and a counterbalancing group adjustable in height by means of capstans. The main structure and the intermediate structure include a detachable side for their withdrawal and separation from the tower during disassembly.

A hoisting system for the installation of a wind turbine wherein said hoisting system comprises measures to achieve a load bearing connection to the tower of the wind turbine and comprises measures to move the hoisting system up and down along the tower wherein the hoisting system, when it is fixed to an already installed part of the wind turbine tower with said load bearing connection, is arranged to install or remove any of a tower segment, a nacelle, a generator, a hub, and a blade in one or more combined hoists or in a single hoist.

A device for removal and installation of a pitch bearing on a wind turbine having a plurality of blades is provided, comprising a platform having a frame, wherein the platform includes a first bearing attachment member on a first side of the frame, and having a first pair of opposing bearing connectors matably engageable to the pitch bearing; a second bearing attachment member on a second side of the frame, and having a second pair of opposing bearing connectors matably engageable to the pitch bearing; and a rigging member attached to the frame, wherein the rigging member includes at least one cable bracket adapted to receive a lifting cable. A method of removal and installing a pitch bearing using the platform is also provided.

A repair system for a gearbox of a wind turbine includes for removably coupling to the first portion of the gearbox housing of the gearbox. The lifting apparatus is adapted for lifting the first portion of the gearbox housing relative to the second portion gearbox housing. The repair system also includes at least one gearbox housing support member for mounting to the second portion of the gearbox housing. The at least one gearbox housing support member provides a support surface for the first portion of the gearbox housing during a repair procedure of the gearbox. The support surface is offset from the second portion of the gearbox housing.