Abstract: A percussion boring device with an impact piston is mounted within a housing and driven in a cyclic back and forth movement. In a first switch position, the impact piston strikes a front impact surface, in order to drive the percussion boring device in a first movement direction, and, in a second switch position, the impact piston strikes a rear impact surface, in order to drive the percussion boring device in a second movement direction. For the reversal of the movement directions, a guide tube fixed to the housing, and a control sleeve which can be axially shifted on the guide tube, are provided, and the impact piston can be axially shifted on the control sleeve. The control sleeve includes two sections which are connected to one another by a movable connection.

Abstract: The invention relates to a drive of a slide of an earth drilling device having a rotary drive and a pinion that is driven by the rotary drive and can be engaged with a rack, wherein the rotary drive is engaged with another pinion which can be engaged with the rack.

Abstract: An earth drilling device includes a frame and a slide which is movable forward in the feed direction and backwards away from the feed direction. The frame includes a tilting device which causes the slide to incline relative to the frame and the feed axis when the slide is moved backward to the feed direction. An additional drill section may be inserted into the slide when it is inclined, then the slide may be moved forward in the feed direction to feed the additional drill section into the soil. A method for moving a drill section includes moving a slide opposite a feed direction in a frame. A tilting device causes the slide to incline relative to the frame and the feed direction, and an additional drill section is introduced into the slide. Then the slide is moved in the feed direction, feeding the additional drill section into the soil.

Abstract: A rod section having an electrical conductor which is arranged such that it is centered at the end and has an insulating sleeve and is fixed in the rod section such that when the rod section is joined to a further rod section having a fixed conductor, both conductors are joined together in a forcibly guided manner and the join is sealed by the sleeve in a forcibly guided manner.

Abstract: A ram boring device has a pressurized-fluid driven striking piston in a device housing and a rotating reversing device configured to urge the striking piston from a forward operation to a reverse operation, in order to create oblique or horizontal bores in the ground. A piston chamber of a rotary piston drive is connected to a control fluid line.

Abstract: A method for introducing a borehole into the ground includes advancing at least two drill heads, detecting one of the two drill heads is detected by a detection unit on the other drill head, and adapting the direction of advance of at least one of the drill heads relative to the other drill head.

Abstract: A drill string section includes at least one plug-and-rotate seat (bayonet seat) for interacting with a (bayonet) catch, wherein the seat allows an additional plug-in step for fixing the catch in a connection secure against rotation in both directions of rotation about the longitudinal axis of the drill string section.

Abstract: The invention relates to an apparatus for inserting a new pipe into an old pipe by means of a self-driven impact device, which simplifies the insertion of a new pipe into an old pipe, and wherein blocking elements of an apparatus according to the invention engage with the inside wall of an old pipe in order to prevent any movement of the self-driven impact device in a direction opposite the direction of advance, as well as a method for using the device. The apparatus according to the invention has blocking elements, which are disposed on at least one base body, but preferably four base bodies, which are in turn releasably mounted on the self-driven impact device. This method is characterized in that the base bodies together with the blocking elements and the self-driven impact device are salvaged by the new pipe.

Abstract: A method for producing a horizontally drilled bore hole in the ground includes the steps of producing a pit having a circular cross-section; lowering a horizontal drilling device into the pit, the horizontal drilling device having a circular cross-section in at least part of the section in which it is positioned once it is lowered into the pit; and producing a horizontally drilled bore hole using the horizontal drilling device.

Abstract: A transmitter housing for a drilling device having a drilling fluid feed line comprises a collector space formed in the interior of the transmitter housing for accommodating a pressure sensor of a locating probe.

Abstract: A horizontal drilling device according to the invention includes a linear drive, a rotary drive that can be displaced by means of the linear drive, a drill rod assembly and a rod assembly pipe receiver, the drill rod assembly being hollow and the rod assembly receiver being designed as a receiving mandrel, which allows the drill rod assembly to be placed on the receiving mandrel.

Abstract: A ground-drilling device includes a basic body and a drill head movably mounted in relation thereto in the longitudinally axial direction, wherein a free space, which is variable in its size owing to the movable mounting, is formed between the drill head and the basic body, and a sealing element for sealing the free space with respect to the environment, wherein the sealing element is designed as a valve element which opens when an overpressure is present inside the clearance, in order to produce a pressure compensation, and which is closed when a negative pressure is present inside the clearance, in order to prevent a pressure compensation.

Abstract: A rod magazine for accommodating rod linkages for a drilling device having a frame including elongated bars connected so as to define a quadrangular space. First and second end plates are attached to respective ends of the frame. A first head is releasably attached to the first end plate and includes a plurality of separating elements. A second head is releasably attached to the second end plate and comprises a plurality of separating elements. Each of the plurality of separating elements of the first and second heads are variably positioned relative to an adjacent one so as to define a plurality of separating rows, wherein each separating row is configured to receive one or more ends of rod linkages within the interior of the frame.

Abstract: A dual pipe rod assembly section includes an inner rod section and an outer rod section, with a probe which is arranged in the dual pipe rod assembly section, a horizontal drilling device and a probe housing. The probe is arranged in the inner rod section and rotationally coupled to the outer rod section.

Abstract: A plug connection for connecting two pipe sections of a drill pipe has a connecting plug on one end of a first of the pipe sections and a connecting bushing on one end of the second pipe section. The connecting plug and the connecting bushing have helical meshing guide projections and/or guide grooves. A pipe section for a drill pipe has on one of its ends a corresponding connecting plug and on the other end a corresponding connecting bushing.

Abstract: The invention relates to an earth drilling device (1) for boring a borehole into the soil and/or for drawing a line (9) into an underground passage, comprising at least one system line (4, 6) extending from the earth drilling device to a start region, wherein the system line is designed in an electrically insulating manner.

Abstract: A method for operating a horizontal drilling device includes the steps of fixing a rod assembly section within a through-opening formed by a rotational drive of the horizontal drilling device, and connecting the rod assembly section to a rear end of a drill rod assembly of the horizontal drilling device or releasing the rod assembly section from the drill rod assembly by a linear and/or rotational movement of the rotational drive, wherein force transmission means for transmitting compressive and/or pulling forces and/or a rotational torque to the drill rod assembly are provided in the through-opening, wherein the rotational drive is displaceable by a linear drive of the horizontal drilling device, and wherein the drill rod assembly is configured as rod assembly string and is composed of a plurality of interconnected rod assembly sections.

Abstract: A boring element of a ground boring device includes a housing having a receptacle, a transmitter arranged in the receptacle of the housing and supported in the receptacle for movement in a longitudinal-axial direction of the boring element, and a front buffer connecting the transmitter with the housing. The transmitter moves towards a rear in the receptacle as a result of a deformation of the front buffer, when a rear percussive impulse is applied to the boring element, without the transmitter coming directly into contact with another part of the boring element.

Abstract: The invention relates to a guide device for a drilling device, comprising a housing having deflection means for generating a side force, and a shaft rotatably supported within the housing, wherein the shaft comprises connection means at a first end for connecting to a drilling rod, and connection means at a second end for connecting to a drilling head, and wherein coupling means are provided for connecting the shaft to the housing in a rotationally fixed manner as needed.

Abstract: A connecting device with a drive section having a thread on the end, wherein the connecting device can be used to screw a shaft element to a thread corresponding to the thread of the drive section, wherein, in addition to the thread, at least one positive-locking element forming a positive-locking connection with the shaft element is provided.