Abstract: The invention relates to a drill head and a device for drilling a bore in the ground, the drill head having a first unit coupleable with an inner drill pipe of a double drill pipe assembly and a second unit coupleable with the outer drill pipe of the double drill pipe assembly. By means of the inner drill pipe the first unit is rotatable about an axis of rotation relative to the second unit which is drivable by means of the outer drill pipe. The drill head has a sliding contact arrangement for establishing an electrical connection between the first unit and the second unit.

Abstract: In a method and a device for moving a working means in the ground, a coupling means rotatable about an axis of rotation for establishing a drive connection between a push-pull unit and a rod assembly having at least one projection and/or at least one recess is engaged with the projection and/or the recess of the rod assembly such that via a first contact area of the coupling means a first feed force is transmitted from the push-pull unit to the rod assembly. By the counter force opposite to the first feed force a torque acting on the coupling means is generated, which torque presses a second contact area of the coupling means against the rod assembly with a contact force. By the contact force, a non-positive connection is established between the push-pull unit and the rod assembly. Via this non-positive connection, a second feed force is transmitted to the rod assembly. By at least a part of the first and second feed force acting on the rod assembly a linear movement of the rod assembly is caused.

Abstract: A horizontal boring apparatus comprises a traveling framework (10) on which is arranged a boring ramp (18) for guiding a boring rod (19), a rod magazine (22) for receiving individual boring rod sections (19), a drive apparatus (24) for the travelling framework (10) and the boring rod (19). In addition, the horizontal boring apparatus is comprised of an operating station (14, 16), and a mixing apparatus for the preparation of flushing fluid. The mixing apparatus includes a mixing unit (32) having a mixing pump, and is arranged on the traveling framework (10) without a flushing fluid tank. The mixing apparatus has a first inlet port connectable with a flushing fluid source and at least one outlet port releasably connectable with a flushing fluid receiver.

Abstract: A ram device has a cylindrical housing (10) in which is arranged a pressure medium actuated impact piston and a control unit for controlling the pressure medium flow into the housing (10) and which housing (10) at its rearward end is provided with a pressure medium connector (16) and is closable by a closure part (12). The closure part (12) is threadable into an end portion (22) of the housing (10) provided with an internal thread by an externally threaded section (18) and has a second threaded section (20) which stands in engagement with a counter element (22) which abuts a housing surface (40) perpendicular to the housing axis.

Abstract: An earth boring machine 10 with a frame and a linearly movable slide 22 on the frame has an apparatus for holding and rotationally driving a boring rod 24, and a forward feed drive for moving the slide parallel to the boring direction. The machine with especially small space requirement creates a large force for movement of the slide 22 in and opposite to the forward feed direction. Moreover, the forward feed drive of the earth boring machine 10 has a rotationally drivable forward feed spindle 20 arranged on the frame 18, which spindle is received by a spindle nut non-rotationally connected with the slide 22.

Abstract: This invention relates to an earth borer system with a frame (48) incorporating a moveable rotary drive (50, 54) for a drill rod assembly consisting of at least two drill rods which can be detachably connected with one another along a bore axis (58); with a drill rod magazine (44) attached to the frame (48); with a release mechanism positioned on the frame provided with a clamping unit (102, 104, 106, 108, 110) that engages in a first drill rod and a breakaway unit that engages in one section of the rotary drive (50, 54) or in a second drill rod; and with at least one transport arm (66) that is attached to the frame and which can move a drill rod released from the drill rod assembly into a standby position in the drill rod magazine (44) or retrieve a drill rod from its standby position and place it on the drill rod assembly. According to this invention, at least one component unit of the release mechanism is mounted on the transport arm (66).

Abstract: An apparatus for pulling a pipe (12) into an earth bore, especially for replacing a breakable supply conductor laid in the earth, includes an approximately conical displacement head having a cylindrical tubular shaft (18) connected to its large diametered rear end, the outer diameter of which shaft corresponds to the large diameter of the displacement head and the inner diameter of which shaft is larger than the outer diameter of the pipe (12) to be pulled in. Means are provided for connecting the pipe (12) to be pulled in with the shaft (18) and is in the form of at least two clips extending parallel to the axis of the shaft (18) and fixed to the end of the shaft remote from the displacement head and angularly spaced from one another.

Abstract: An in-hole hammer for boring in ground has an elongated hollow housing carrying an internal striking piston in a piston chamber. An exchangeable boring head is threadably connected to the forward end of the housing and the striking piston impacts against the forward wall of the housing defining the piston chamber to transmit forward driving impact energy to the boring head. A boring rod which urges the hammer forwardly and rotates it about the longitudinal axis is connected to the rear end of the housing through a connecting piece non-rotatably fixed, but slidable relative, to the housing so that the axially directed impact energy produced by the striking piston is not transmitted to the boring rod.

Abstract: In a preferably hydraulic control for a preferably hydraulically-driven earth boring mechanism, whereby a boring rod equipped with a boring tool is fed into and out of the earth with simultaneous rotation, the feed speed of the rod is regulated automatically in dependence on the rotational movement applied to the boring rod and/or on the feed force applied to the boring rod to optimize the speed of the boring process and to prevent overload damage to the boring rod, boring tool and other parts of the boring mechanism.

Abstract: For bracing the wagon of a mobile earth boring mechanism, which wagon has a boring rod guide and feed ramp inclined to the surface of the earth when in its working position, at least one anchor is provided having an elongated shaft which is driven into the earth so as to extend generally parallel to the inclined direction of the ramp and which is connectable to the ramp by an associated connecting device. For better resisting loads applied to the anchor, the anchor shaft may have attached to it a helical worm. The anchor or anchors effectively brace the ramp of the boring machine against both tension and compressive forces with substantially no lateral loads being applied to the anchor; and the drive of the boring mechanism which is normally used for rotating and axially moving the boring rod of the mechanism may be used to emplace the anchor or anchors.

Abstract: In a ram boring device with a essentially cylindrical ram housing (10) receiving the ram apparatus, and a displacement head (22) connected with one longitudinal end of the ram housing (10) and whose diameter at its end facing the ram housing (10) has a diameter at least equal to that of the ram housing (10), the ram boring device having a receiving space (24) for a position transmitter (28), a transmitter housing (20) containing the receiving space (24) is arranged between the displacement head (22) and the ram housing (20) with the transmitter housing (20) having an outer diameter at least nearly equal to the outer diameter of the ram housing (10).

Abstract: In an earth boring device with a boring head (14) rotatable about its axis (16), which boring head for the control of its direction has a control surface (18) inclined to its axis (16) and at least one jet (20) for the discharge of a pressurized boring fluid, with the jet openings being arranged on a side of the boring head parallel to the axis of the boring head and facing away from the control surface (18), the axial spacing of the jets from the boring head tip and their stream direction are so chosen that in the use of the boring head the streams escaping from the jets reach essentially only the region of earth lying to the side of the boring head.

Abstract: An apparatus for making earth bores with simultaneous emplacement of pipe, especially for making well bores, includes an earth boring device (10) with a drive device (12) and a displacement head (14) coaxial with the drive device (12). The outer diameter of the displacement head is larger than that of the drive device (12) and of the surrounding pipe (16) with the pipe being connected to the drive device with a releasable force fit connection, wherein at least three pressure fluid jet nozzles (18) are arranged on the displacement head (14) pointing nearly in the boring direction and arranged at least nearly symmetrical to the longitudinal axis of the displacement head (14).

Abstract: A method and apparatus for enlarging a straight or arcuate pilot bore hole and the insertion of tubing in the enlarged bore is disclosed, in which the pilot bore hole 10 is enlarged by advancing a larger diameter housing with a conical enlarging head by impacting of a striking body mounted within a housing against the inside of the enlarging head at the forward end of the housing. Fluid jet cutting action is also employed and the pilot hole boring device may be coupled to exert a steady pull on the housing as it is advanced through the pilot bore. The housing may thus be connected to the pilot bore drilling device, with an interposed cushioning device. The fluid jets may be created by nozzle openings in the enlarging head or in a separate device mounted forward of the enlarging head.

Abstract: In an earth boring device of either the impact ram or static type wherein the device is driven forwardly either by the impacts of an impact piston or by a forward pressure exerted on the device through a rod, directional control of the device is achieved by arranging a plurality of pressure fluid ejecting nozzles on the head of the device symmetrically with respect to its longitudinal axes, and by individually controlling the pressure and/or amount of pressure fluid supplied to each nozzle to deflect the device in one direction away from what would otherwise be its forward drive path.

Abstract: A percussion drill having a control device for controlling its travel forwards and/or backwards is provided with an adjusting and locking device for an axially movable control sleeve (4), this adjustment reversal device being adapted to be controllably operated with compressed air from a control station. A reliable reversal from forward to backward travel of the percussion drill is thus possible even in very long boreholes and even in the event of the collapse of the borehole.