The present invention is an improved apparatus and method for forming a retractable tower or column. The present invention includes pointed hooks wherein the hooks are attached to each section of a section chain, one in a horizontal direction and one in an off-set manner. The section chains are placed on a take up mechanism in an operable position and then raised utilizing a motor. As the section chains are raised, they are guided by a guide tower, rollers, shims, and gear racks into a position whereby hooks from adjacent sections of the section chains form coupled engagements. The coupled engagement of the hooks of the sections of each adjacent section chains thereby form the column.

The present disclosure is directed to

A mobile well drilling apparatus for a drilling site with clustered wells includes a substructure. A mast includes hinging points and fixing points. The mast is hinged to the substructure via the hinging points, about which the mast rotates between a horizontal and a vertical position. A drill floor includes a first portion hinged to the mast, and a second portion fixed to the mast and moving integrally therewith; and a draw-works permanently installed on the substructure. The substructure includes first and second sub-bases. The sub-bases are parallel and spaced apart. The first portion of the drill floor includes a connection portion facing one of the sub-bases. The hinging points are connected to one of the sub-bases. In operation, the fixing points are connected to the opposite sub-base. Each sub-base includes hydraulic walking devices adapted to move the well drilling apparatus between the clustered wells on the drilling site.

An antenna assembly and related methods are described. The antenna assembly (1) comprises an extendible mast (2) constructed and arranged so as to be configurable between a coiled form and an extended form. The extended mast (2) is resiliently biased in the form of an elongate tube having a slit along its length. The coiled mast is wound about an axis extending transversely to the longitudinal extent of the mast. An antenna (6) is integrally coupled to the mast such that when extended, the mast supports and positions the antenna, and when coiled, the mast and antenna are coiled together.

An antenna assembly and related methods are described. The antenna assembly (1) comprises an extendible mast (2) constructed and arranged so as to be configurable between a coiled form and an extended form. The extended mast (2) is resiliently biased in the form of an elongate tube having a slit along its length. The coiled mast is wound about an axis extending transversely to the longitudinal extent of the mast. An antenna (6) is integrally coupled to the mast such that when extended, the mast supports and positions the antenna, and when coiled, the mast and antenna are coiled together.

A sonic drilling apparatus with adapter for emplacing columns includes a sonic drilling apparatus generating vibrational waves and having a fitting. An adapter is coupled to the fitting for removably attaching a column to the sonic drill apparatus. A centering assembly is positioned below the adaptor for receipt of a column therethrough.

A sonic drilling apparatus with adapter for emplacing columns includes a sonic drilling apparatus generating vibrational waves and having a fitting. An adapter is coupled to the fitting for removably attaching a column to the sonic drill apparatus. A centering assembly is positioned below the adaptor for receipt of a column therethrough.

A device configured to support an object above the ground. The device includes a first end and an opposite second end, an axis being defined between the first end and the second end. A body surrounds the axis and extends from the first end to the second end. A mount section of the body is closer to the first end than to the second end. The mount section has a first cross-section and is configured to be coupled to the object. The first cross-section has a circular shape. A main section of the body is located between the mount section and the second end, which has a main cross-section having a hexagonal shape. An indentation in the body is closer to the second end than to the first end. The device is configured to be installed in the ground such that the indentation is below the ground.

A mobile pole for temporary support of one or more electrical lines includes a boom assembly mounted on a wheeled trailer. The boom assembly includes a plurality of segments pivotably attached to one another. Actuators acting between the segments effect pivoting motion to deploy and stow the segments. A utility pole having one or more cross members is mounted on a free end of one of the segments. The utility pole is rotatable about its longitudinal axis to orient the cross members relative to the electrical lines.

The invention relates to a tower section and to a method for raising said section with a complete new or existing wind turbine on the upper part thereof, the assembly being raised to heights greater than 120 meters by means of a raising system that operates at ground level and gradually inserts modular frame structures through the lower part. The modules have heights between 10 and 14 meters and are formed by a trellis of at least three vertical columns and with diagonal elements which react to the twisting moments and shear forces generated by the action of the wind. A transition part with a base sufficient for raising in wind conditions greater than 15 meters/second is disposed on top of the modules. The raising method has several steps, for example: producing and installing a foundation; assembling the transition part on a connection element of a footing; mounting the wind turbine complete with the tubular tower, nacelle and rotor thereof; installing a lifting system and joining structures on a connection element of the footing; lifting a module N; assembling the different modules; and lastly assembling the final module and removing the automatic raising system.