Abstract: Described herein is a bit (9) for excavation and compaction equipment (1) for erecting piles, the bit (9) being provided with a central body (21), an excavation screw (24) fixed to the central body (21), and a dislocating element (40) for compaction of the walls of the excavation, a retention device (25) that can be selectively re-closed being associated to the central body (21) for preventing fall of debris beyond a leading edge (27) of the screw (24) during extraction of the bit (9), and the dislocating element (40) being mounted on a fixed portion (28) of the retention device (25), and presenting a radial development, which decreases with respect to a rotation of excavation of the excavation screw (24) for compaction of the walls (3a) of the excavation (3) during extraction of the bit (9).

Abstract: In a device, which is suspended from cables or other flexible or articulated structures, for the mixing in situ of earth for the formation of underground walls or diaphragms presenting in its lower part disaggregating means (1) for the disaggregation of the earth, above the disaggregating means are positioned correcting means (5, 13) for the direction of the excavation being able to rotate around substantially vertical axes.

Abstract: A system for high-depth drilling of the ground aimed at reaching hot rocks for extraction of geothermal energy by means of introduction of a heat-conveying fluid and extraction thereof after adequate heating uses just one borehole containing two coaxial tubes: an internal tube (3, 11, 13), through which the cold fluid is introduced, and an external or coating tube (4, 6), through which said fluid returns to the surface after it has been heated by the hot rocks either directly or through said coating tube.

Abstract: Described herein is a method and equipment for making an impermeable diaphragm of secant piles, based upon the execution of parallel holes with constant distances between centres, said method and equipment being of the type that uses a drill rod (5) equipped, at the bottom end, with a bit (16) for making adjacent holes (1, 1?, 2) of substantially circular cross section, in which the equipment is constituted by a guide (6, 7), constrained to the drill rod (5), and made up of two elements shaped so as to press against the walls of two adjacent holes (1, 2); the two elements are connected to one another through a slider (20) passing through a vertical opening (21) made between the two holes (1, 2).

Abstract: Described herein is excavation equipment for mixing in loco excavated soil and for the formation of diaphragms within the excavated hole of the type constituted by a plurality of rods for drilling soil (10) arranged alongside one another; each rod performs a rotary and translational motion about and along its own axis; supplied along the rods is a thickening fluid that exits with high kinetic energy through nozzles (23 and 24) made in positions corresponding to bits of a set of bits (11) located at the free ends of the rods (10) and rendered fixed in rotation and translation therewith; the bits are interconnected and separated by means of fixed structures (16, 16?) that guarantee non-interference and maintenance of the distance between them; the bit of each rod (10) is equipped, at its ends, with disgregating means (14) and, at the centre, with means (18, 21) for mixing the soil and said aggregating fluid; the bits are enclosed at least partially within a quadrilateral caisson (12), designed to line the walls

Abstract: Equipment (1) for stowing and handling drill pipes (2), the equipment being provided with a device for transporting the drill pipes (2) from a service well (9) to a rack container (11); the transport device being defined by a central control tower (23) located in front of the container (11) and being able to rotate around an axis of vertical rotation (A) and by a grip device (24) supported by the central tower (23) and movable together with, and in relationship to, the central tower itself from a working grip position at the well (9) to a working release position at the bin (12) of the container (11).

Abstract: Boring unit for pile foundations presenting a tracked vehicle facing the mouth of a hole, a mast (5) which is supported by the tracked vehicle, a rotary table (6) which is slidingly mounted along the mast (5), and at least one excavation element (7) which is connected to the table (6) and which presents a boring tool (8) at its own lower end. The boring unit may also include a handling device (11) which provides for moving the excavation element (7) and for moving further auxiliary excavation elements (19, 20) and which is also provided with a head (12) mounted on a top end of the mast (5) that is equipped with a hoist (13) and a central cable (14) which can be alternatively connected to the excavation element (7) via a drive unit (40) which is suitable for co-operating with the hoist (13) in order to rapidly move the auxiliary excavation elements.

Abstract: A locking device has a lower concave housing suitable to receive and hold an upper end of an element to be attached to a drill stem. The housing forms a conical surface. A number of blocks slides along the conical surface. Each block has an outside sliding surface that is parallel to the conical surface and has an inside surface suitable to engage the elements to be held. The blocks are mounted to slide along the conical surface. The blocks are moveable from a first, free position in which the blocks are pushed toward the lower, outside surface of the conical surface to a second, locked position in which the blocks are radially clamped against the element to be hold.

Abstract: A device for joining an element to a string of elements already mounted, including threaded rods and tubular casing elements covering the walls of a borehole, for use in drilling equipment including a rotary head driving said string with a combined movement of rotation about a substantially vertical axis and translation along said axis. The device includes a clamping device for clamping and guiding a single element, coupled to a friction screwing device (18). The clamping and guiding device is adapted for holding the single element in an axially aligned position relative to the elements already mounted. The clamping and guiding device is idly mounted to, and suspended from the rotary head. The friction screwing device has a rotating portion and a non-rotating portion. The rotating portion is provided with a lower friction device sliding along and rotating about an output rotary shaft of the rotary head.

Abstract: A system for stowing and handling rods (50) for use in drilling rigs (110) comprising a drilling tower (122) with a driving head (130) movable between a borehole and a service well (151) for taking up and depositing the drilling rods. The system comprises:a rigid base (62) provided with a plurality of hinging seats (78);a plurality of rod containers (61), each provided at its foot (73) with hinge pins (73,79) for its rapid hinging to the base (62);a jib crane (63), a cable (80) and a coupling device (81) for rotating the containers (61) in a vertical plane between a substantially vertical operating position and a lying-down position (61') for their assembly and disassembly. The crane (63), cable (80) and coupling device (81) are mounted on the drilling rig (110), for withdrawing the rods (50) from the containers (61).

Abstract: An underground circular and non circular parking place where vehicle parking areas are obtained and arranged radius-like on several underground stories.