A lift system for performing operations on a structure includes a base and rack assembly mounted on the base. The rack assembly includes at least two legs. A carriage is engaged with the rack assembly, and is configured to travel vertically along the legs of the rack assembly. A crane is configured for transverse movement on the carriage. In some implementations, the base is moved under self-propulsion. In some implementations, the base includes a leveling assembly that is operable to adjust an orientation of the rack assembly with respect to the structure.

A pole cradle is disclosed. The pole cradle including a first leg; a second leg; a third leg positioned between and pivotally connected to the first and second legs by a pivot connector extending through the first, second, and third legs; and wherein the third leg pivots relative to the first and second legs between a first position where the first, second, and third legs lie in plane to form a flat surface and a second position where the first, second, and third legs form a V-shaped receiving section.

A pole cradle is disclosed. The pole cradle including a first leg; a second leg; a third leg positioned between and pivotally connected to the first and second legs by a pivot connector extending through the first, second, and third legs; and wherein the third leg pivots relative to the first and second legs between a first position where the first, second, and third legs lie in plane to form a flat surface and a second position where the first, second, and third legs form a V-shaped receiving section.

A multi-purpose bolt unit for fixing an object to a drilled hole formed in a soft construction structure. The multi-purpose bolt unit including: a cylindrical body inserted into the drilled hole; a front end tip formed at a lower end of the cylindrical body and having a larger outer diameter than an outer diameter of the cylindrical body; an upper thread surface formed in an upper side of the cylindrical body while spaced apart from the front end tip; an elastic packing pipe inserted into the cylindrical body and placed on the front end tip; an upper washer inserted into the cylindrical body and placed on the elastic packing pipe; a compression nut screwed to the upper thread surface and pressurizing the upper washer so that the elastic packing pipe expands; and a fastening screw groove formed inside the cylindrical body and opened upward through the compression nut.

Assembly process of a telescopic tower (100) including at least one prefabricated concrete section, comprising the following steps: providing sections (2,4,6,8,10) in an initial position wherein superimposed sections are disposed coaxially within a base section (10); providing assembly means (14,16,18); providing operator support means (20) on the external surface of said base section (10) essentially vertically in correspondence with the upper edge of said base section (10); lifting the innermost superimposed section (2,4,6,8) radially from those that are in the initial position forming a joint between the lower end portion of said superimposed section (2,4,6,8) which is being lifted and the upper end portion of the radially external and immediately adjacent section (4,6,8,10); providing in said joint anchoring devices for immobilizing at least provisionally the corresponding sections (2,4,6,8,10) between one another.

Assembly process of a telescopic tower (100) including at least one prefabricated concrete section, comprising the following steps: providing sections (2,4,6,8,10) in an initial position wherein superimposed sections are disposed coaxially within a base section (10); providing assembly means (14,16,18); providing operator support means (20) on the external surface of said base section (10) essentially vertically in correspondence with the upper edge of said base section (10); lifting the innermost superimposed section (2,4,6,8) radially from those that are in the initial position forming a joint between the lower end portion of said superimposed section (2,4,6,8) which is being lifted and the upper end portion of the radially external and immediately adjacent section (4,6,8,10); providing in said joint anchoring devices for immobilizing at least provisionally the corresponding sections (2,4,6,8,10) between one another.

The present disclosure, in one or more embodiments, relates to a drilling rig with a self-elevating drill floor. The drilling rig may have one or more jacking systems that may operate to raise the drill floor. The one or more jacking systems may raise the drill floor to a height sufficient to accommodate a substructure such as a substructure box. A substructure box may be placed, and the one or more jacking systems may lower the drill floor onto the substructure box. Substructure boxes may be placed beneath the drill floor, using the one or more jacking systems, until a desired drill floor height is reached. In some embodiments, the one or more jacking systems may additionally operate to move the drilling rig, for example between adjacent wells on a pad drilling site. The jacking systems may operate to move the drilling rig using walking feet or another mechanism.

A utility pole setting trailer includes a horizontal frame configured to carry utility poles to remote locations, a set of wheels supporting the horizontal frame, a hydraulic boom coupled to the horizontal frame and configured to load and unload the utility poles on to the horizontal frame, and a motor coupled to the hydraulic boom and configured to power the hydraulic boom. The hydraulic boom includes a first arm and a second arm, and a grapple is coupled to a distal end of the second arm. The grapple is configured to grasp a respective utility pole. In addition, the horizontal frame includes a front portion and a rear portion that are configured to extend apart from each other to increase a length of the horizontal frame.

A drilling rig includes a base section, a first section, a second section, a third section and a fourth section. For the base section upper region, a fixed pulley block and a guide pulley are installed. Except for the fourth section-crown block section, each section lower region is installed with a lifting lug for a movable pulley block installation for substantially vertical lifting. The crown block section is installed substantially vertical; the subsequent section is located substantially horizontal with the section front pillar upper region connecting to the previous section front pillar lower region. The previous section is substantially vertical lifted to draw the next section skidding into the base section and lifting substantially vertical with the previous section pillar lower region connected to the next section pillar upper region. Dismount the movable pulley block from the previous section and installed the movable pulley block with the adjacent section lifting lug.

A drilling rig includes a base section, a first section, a second section, a third section and a fourth section. For the base section upper region, a fixed pulley block and a guide pulley are installed. Except for the fourth section-crown block section, each section lower region is installed with a lifting lug for a movable pulley block installation for substantially vertical lifting. The crown block section is installed substantially vertical; the subsequent section is located substantially horizontal with the section front pillar upper region connecting to the previous section front pillar lower region. The previous section is substantially vertical lifted to draw the next section skidding into the base section and lifting substantially vertical with the previous section pillar lower region connected to the next section pillar upper region. Dismount the movable pulley block from the previous section and installed the movable pulley block with the adjacent section lifting lug.