Disclosed is a power transmission tower having elevatable trusses. The power transmission tower has a tower head, a tower body, and a tower leg. The power transmission tower comprises a truss set symmetrically arranged at both sides of the tower body and an elevating device which is capable of driving the displacement of the truss set. The elevating device comprises a power unit arranged within the tower body, and a linear slide module secured to side of the tower body. The linear slide module is connected to the power unit and the truss set, respectively.

Disclosed are tower erection systems and tower climbing systems and associated methods of operation. A tower erection system, in accordance with various embodiments, includes a ground-installed lifting structure, and a lifting frame configured to latch onto individual tower sections and traveling vertically inside the ground-installed lifting structure, lifted by a winch-and-cable or other lifting mechanism. Using this system, a tower may be assembled from multiple sections from the top down. A tower climbing system, in accordance with various embodiments, includes upper and lower climbers that can latch onto the lateral surface of a tower and a lifting mechanism that can move the climbers vertically relative to each other. The system can be used to carry a crane or other heavy equipment up and down along the tower. A climbing crane may be used, for example, during tower construction, or to reach the top of the tower for maintenance or repair.

A side saddle slingshot drilling rig includes a right substructure and a left substructure, the substructures positioned generally parallel and spaced apart from each other. The right substructure includes a right lower box and a first strut, the first strut pivotably coupled to the drill rig floor and pivotably coupled to the right lower box. The left substructure includes a left lower box and a second strut, the second strut pivotably coupled to the drill rig floor and pivotably coupled to the left lower box. The side saddle slingshot drilling rig also includes a drill rig floor, the drill rig floor including a V-door. The side of the drill rig floor has the V-door defining the V-door side of the drill rig floor, the V-door side of the drill rig floor parallel to the right substructure. The side saddle slingshot drilling rig further includes a mast, the mast including an open side defining a mast V-door side. The open side is oriented to face perpendicular to the right substructure. The mast is pivotably coupled to the drill rig floor by one or more mast pivot points and one or more lower mast attachment points, the mast being pivotable in a direction parallel to the V-door side of the drill rig floor or the mast being pivotable in a direction perpendicular to V-door side of the drill rig floor. The mast includes two or more subunits, wherein the two or more subunits are pinned together.

The invention relates to a movable module and to a method of hoisting telescopic towers, preferably wind turbine towers, an ascending section of the tower being hoisted in relation to a supporting section of the tower immediately outside. The movable module preferably comprises at least one hydraulic jack; at least one hoisting cable pre-installed through the hydraulic jack and which remains connected to the jack throughout the performance of the method of hoisting the telescopic tower; and grouping means arranged at the free end of at least one hoisting cable. Advantageously, during hoisting, the movable module is temporarily fixed to the head of the supporting section, and the grouping means (4) are temporarily fixed to the base of the ascending section.

A system and method are used for transporting a plurality of tower sections of a wind turbine on beds of transport devices, such as flat railcars. Supports affix at support locations on beds to accommodate at least one of the tower sections on each of the transport devices. The supports can include bed supports, such as tabs, extending from the beds, and can include cradle supports with slots that engage on the tabs. A circumferential dimension of a cradle is adjusted on each of the supports against which the tower section rests. Each of the tower sections is then supported with at least two of the supports by loading the tower sections on the transport devices. An end of each of the tower sections is then affixed to a flange on at least one of the supports on each of the transport devices.

A mobile tower for transportation to and rapid deployment at remote sites where the mobile tower can be engaged with the ground, the mobile tower including an extendable and retractable tower secured to a mobile support structure including a frame having a plurality of rapidly deployable outriggers, wherein the tower includes three series of pivotally interconnected tower sections or segments, sections or segments of which engage with segments of each of the other series when the tower is assembled; the mobile tower including a plurality of guy wires secured between the extendable and retractable tower and the respective outriggers to stabilize the tower after the tower is assembled. The guy wires are preferably secured to the extendable and retractable tower at first and second connecting positions that are displaced from one another about an outer perimeter. Methods of deploying the mobile tower are also disclosed.

The disclosed technology includes temporary support structures for use in the repair of a transmission tower. A typical transmission tower includes a tripod that receives the load of the tower and distributes it to piles embedded in the ground. A temporary support structure can temporarily remove the load of the transmission tower from the tripod to enable removal of the tripod and installation of a new tripod. A temporary support system can include a bearing platform system attachable to piles of the transmission tower, a bearing frame supported by the bearing platform system, a lifting system supported by the bearing frame, and a flower pot adapter configured to attach to a portion of the transmission tower, and the temporary support system can thereby be configured to remove the load of the transmission tower from the tripod of the transmission tower.

Tower erecting systems and methods are disclosed. An example method for erecting a tower includes: nesting frusto-conical tower sections within one another and within a frusto-conical tower base; securing the frusto-conical tower base to a tower foundation; lifting each frusto-conical tower section from within the frusto-conical tower base with a lifting apparatus; and securing each frusto-conical tower section to the frusto-conical tower base or to a previously lifted frusto-conical tower section.

A mobile tower for transportation to and rapid deployment at remote sites where the mobile tower can be engaged with the ground, the mobile tower including an extendable and retractable tower secured to a mobile support structure including a frame having a plurality of rapidly deployable outriggers, wherein the tower includes three series of pivotally interconnected tower sections or segments, sections or segments of which engage with segments of each of the other series when the tower is assembled; the mobile tower including a rigging apparatus that generally encircles the tower and a plurality of guy wires secured between the tower and the respective outriggers to stabilize the tower after the tower is assembled. The guy wires are preferably secured to the rigging apparatus at first and second connecting positions that are displaced from one another about an outer perimeter of the rigging apparatus. Methods of deploying the mobile tower are also disclosed.

A self-building tower comprising a plurality of tower sections adapted to be connected in a sequence to form a modular tower, and a tower feeding system having a feeder sleeve block. The feeder sleeve block is elevated above a horizontal surface by a support column, and has a feeder aperture which allows tower sections to be positioned between the feeder aperture to be fed upwardly through the feeder sleeve block. The feeder sleeve block supports the modular tower in a position perpendicular to the horizontal surface. The tower feeding system has a hoist mechanism for raising each tower section through the feeder aperture, allowing additional tower sections to be attached to the lowermost tower section in the sequence.