DE102012204496A1 - Drilling device for producing well bore, has conduit emerged from rear end of drilling element, which comprises primary cable end arranged in drilling element and secondary cable end arranged outside the drilling element - Google Patents

Abstract

The drilling device has a tubular drilling element (10) having an axis of rotation (13), with a forward end (15) in direction of advancement (14) and a rear end (40) in the advance direction. A drive unit (30) is provided for driving the drill element about the axis of rotation. A conduit (50) emerged from the rear end of drilling element, which is provided with a primary cable end (51) arranged in the drilling element and the secondary cable end (52) arranged outside the drilling element. An independent claim is included for drilling method.

Description

The invention relates to a drilling device for producing a ground hole comprising an at least partially tubular drill element having a rotation axis, a front end in a forward drive direction and a rear end in the drive direction, and a drive unit for driving the drilling element about the rotation axis.

The invention further relates to a drilling method comprising the step of: driving an at least partially tubular drill element having a rotation axis, a front end in a propulsion direction and a rear end in the propulsion direction, by means of a drive unit about the axis of rotation.

Drilling and drilling methods of the initially mentioned are used in particular for producing and producing, also referred to as Abteufen, of earth bores. Wells are usually round wells (holes) in the ground, such as soil, rocky soil or ground. Erdbohrungen can z. B. be executed as deep holes and can be both vertically in the underground reaching holes as well as inclined or oblique or horizontal holes (for example in walls of excavation pits). Ground bores can be embodied, for example, as cased and uncased bores, press, displacement bores, clearing bores, vibratory, vibratory or driven bores, and are preferably introduced into the underground using beating or rotating drilling methods or combinations of both. Well drilling is often done in the context of construction, earthworks or mining, for example, prior to or during drilling, drilling or drilling of structural elements such as bored piles, ground anchors, injection piles, steel and concrete piles or piping into the wells. Furthermore, earth bores are inevitably carried out in the course of the production of soil consolidations, Hochdruckinjektions- or jet radiators and water impermeability in soils; z. For example, for building underpinnings, excavation walls, building foundations, buoyancy protection, Hohlraumverfüllungen and injections, etc .. Often, earth boreholes under difficult conditions in non-accessible or hard to reach areas of a built and / or undeveloped terrain, such. B. below buildings, structures, components, traffic or water surfaces are made.

A drilling element may preferably be designed as a drill pipe, drill pipe or auger. The drilling element may be formed as an element or comprise a plurality of detachable part drilling elements, which are so firmly connected to each other or detachable from each other that they define a common axis of rotation in the connected state. For example, screw connections between the partial drilling elements are preferred, wherein corresponding threads are preferably formed on the ends of the partial drilling elements. In a drilling element, which is designed as a drill pipe, this may mean that the respective ends of the tubes are connected to each other, so that the sub-drilling elements, for. B. in the form of partial pipes, connected together form an elongated drill pipe or a drill string. At its front end in the direction of advance, a drilling element may preferably have a drill bit with force-fit recessed drill pins. The rear end of the drilling element is opposite to the front end and is usually located outside the borehole.

The term rotation axis is to be understood as a centrally in the drilling element and in the direction of extension of the drilling element extending axis of rotation. The drilling element may preferably be formed substantially rotationally symmetrical about the axis of rotation. The advancing direction of the drilling element is the direction in which the drilling element moves during drilling in the borehole along the axis of rotation.

The drive unit serves for driving the drilling element, in particular in a rotational movement. That is, the drive unit preferably rotates the drilling element about the axis of rotation so that the forward end of the drilling element generates a borehole. The ground in the area of the drill bit (overburden or excavation) is preferably conveyed through the borehole (in or around the drilling element) against the advancing direction to the surface, for example by means of a drilling screw, air pressure or a rinsing liquid. Preferably, the drive unit can drive the drilling element also in the advancing direction, d. H. drive the rotating drilling element in the advancing direction to exert additional pressure in the advancing or advancing direction to the ground. The drive unit can also be preferred for generating both a rotational and a propulsion movement (eg percussion drilling method). The drive unit may be formed, for example, as a diesel-hydraulic, diesel-mechanical, electro-hydraulic or electric drive.

In the context of earth drilling, preparatory and / or accompanying work is often required, such as the extraction of soil samples and explosive ordnance, as well as locations of metallic underground pipelines and tanks (gas, water and oil pipelines, electrical, signaling, data transmission and control) Communication lines, as well as oil, gas and water tanks, etc.). In particular, ordnance are on territories, eg. As in certain states, necessary where warlike events partially defused or not detonated ordnance below a terrain or earth surface in the ground are left. In some states, according to the local legal and regulatory requirements before the start of (earth) construction work, eg. B. before drilling into the ground, first to clarify the actual presence of ordnance by means of certain investigation methods. If ordnance is detected in a soil, it must often be cleared by a clearing service prior to the commencement of earthworks.

Such preparatory and / or accompanying work, especially for combat probe sounding, is time consuming and complex. Since the range of, for example, measurements taken in the course of preparatory and / or accompanying work is often limited, it may be necessary to repeat the measurements as the depth of the wells progresses. Only after a measurement has been taken at a certain depth can the wells be sunk to a further depth, in which measurements must be taken before the well can be lowered further. In particular, in deep wells may therefore be necessary to interrupt wells often for measurements. Such punctual soundings may be sufficient, for example, for pile foundations of radio signal and power mast systems or for components inclined or drilled in the ground or rock, such as injection piles, ground anchors, steel and reinforced concrete piles. In other cases, preparatory and / or accompanying work must be carried out on larger areas of a suspected area. This can mean that a multiplicity of bores, for example in a grid, are created, in which, as described above, measurements at different depths have to be made several times. The performance of such preparatory and / or accompanying work may therefore, for example, significantly increase the overall duration of construction projects.

The invention is therefore based on the object to provide an improved drilling apparatus for the production of earth bores and a corresponding improved drilling method, which reduce or eliminate one or more of the above-mentioned disadvantages. In particular, it is an object of the invention to provide an improved drilling apparatus for the production of earth bores and a corresponding improved drilling method, with which or with the implementation of preparatory and / or accompanying work is simplified.

This object is achieved according to the invention by a boring device for producing a borehole, comprising an at least sectionally tubular boring element having a rotation axis, a front end in a forward drive direction and a rear end in the advancing direction, a drive unit for driving the boring element about the axis of rotation and a pipe, the first conduit end of which is disposed in the drilling element, the conduit exiting the rear end of the drilling element and a second conduit end being disposed outside the drilling element.

In a boring device according to the invention, a partial section of a conduit thus runs in the drilling element, preferably in a hollow inner region of the boring element, for example in the interior of a hollow drill pipe. More preferably, two, three or more conduits may run in the hollow interior of the drilling element and exit from the rear end of the drilling element. If embodiments and advantages in relation to a line are described below, they also apply analogously to two, three or more lines.

In particular, the first end of the line and a portion of the line is arranged in the drilling element. The line runs from the line end from opposite to the direction of advance toward the rear end of the drilling element, exits there (for example, from the interior of a hollow drill pipe) and extends outside of the drilling element on to the second line end.

The first line end and the section of the line running in the drilling element can preferably run essentially centrally in the drilling element, for example substantially along the axis of rotation. In particular, in a tubular section of the drilling element, the line preferably extends in the interior of the tubular portion along the axis of rotation from the first line end to the rear end of the drilling element, which may be formed in particular as an open pipe end, and there emerges from the drilling element. "Essentially centrally in the drilling element" is to be understood in the context of the present invention such that the line does not have to be guided exactly centric on the axis of rotation, but only positively guided in the cavity of the drilling element such that it itself undergoes no rotation.

As an alternative to guiding the line centrally substantially on the axis of rotation of the drilling element, the line can also be arranged in the region between the axis of rotation and the inner wall of the drilling element. Especially when Provision of two, three or more lines may be arranged together, preferably bundled, centrally substantially on the axis of rotation of the drilling element or in the region between the axis of rotation and the inner wall of the drilling element or individually at different locations in the cross section of the drilling element.

Preferably, one, two or more retaining elements are provided in the drilling element in order to guide the line (s) within the drilling element, preferably without force.

A holding element may for example be annular and connected to the inner wall of the drilling element, for example by means of welding or gluing. This variant is particularly preferred in the case of conduits running centrally substantially on the axis of rotation of the drilling element.

A holding element may for example also be designed as a perforated disc. The perforated disc is preferably arranged in a plane orthogonal to the axis of rotation or to the advancing direction of the boring element. In order to enable positive guidance within the boring element, the diameter of the perforated discs is preferably less, for example approximately 2 mm, than the inner diameter of the boring element. In this case, preferably one line is guided through a respective hole of the perforated disc. There may be provided a plurality of holes through which a respective line is guided. However, two, three or more lines can be passed through a hole of the perforated discs. The line (s) is or are preferably with the perforated disc, z. B. by gluing or welding, connected.

It is further preferred that a plurality of holding elements are provided, which are each arranged at a distance from one another along the axis of rotation or in the advancing direction of the drilling element or which are each connected at a distance from one another to the line or lines.

The second line end arranged outside the drilling element is preferably also arranged outside the drive unit. This second line end may be connected to other lines or connection elements. At the first (generally lower) end of the line may preferably be arranged a measuring unit or a probing means.

The drilling device according to the invention thus enables a line connection from outside into the drilling element - and thus into a borehole - into it. In this way, preparatory and / or accompanying work, for example, the probing of ordnance suspected areas, can be simplified, since a separate introduction of a corresponding line can be omitted. This makes it possible, for example, without removing the drilling element - completely or partially - to remove from the well, to introduce a line in the borehole by the line sections in the drilling element. At the same time, the connection of the line, in particular with its second end, outside the drilling element and preferably also outside the drive unit is possible, so that the line can be connected to facilities, for example, for controlling or evaluating transmitted data.

With the drilling device according to the invention, the first end of the line can parallel and successively with the sinking of the drilling element in depth, at the same time a continuous, uninterrupted data transmission by a continuous guidance of the line from the drilling element and preferably also the drive unit out to the second line end, for example to a On the second end of the line arranged terrain surface standing meter is enabled.

The invention is particularly advantageous in earth drilling under difficult conditions in non-accessible or hard to reach areas of a built and / or undeveloped terrain, z. B. below buildings, structures, components, traffic areas, water bodies, since a further device or a separate step for introducing a conduit can be omitted in a well, since the line or a line section according to the invention can be introduced with the drilling element in the well ,

The advantages of the drilling device according to the invention come in both punctual preparatory and / or accompanying work as well as in flat applications with grid-like arranged Erdbohrungen to advantage.

A preferred embodiment of the drilling apparatus according to the invention is characterized in that the conduit, in particular the first conduit end and preferably a conduit section arranged in the drilling element, is arranged to be movable relative to the drilling element, preferably substantially along the axis of rotation.

As a result, for example, the first line end can be positioned at different locations within the drilling element or the borehole or moved into different regions of the boring element. In this way, the first line end and the subsequent line section can be brought into the areas or in the depth at which preparatory and / or accompanying Working, for example, a measurement to be performed.

In addition, especially during drilling, the first end of a line from a drill head area, i. H. a front region of the drilling element viewed in the advancing direction, in a region which is arranged opposite to the advancing direction at a distance from the drill head, are moved. This has the advantage that, for example, sensitive devices arranged at the first line end, for example measuring probes, are not damaged during drilling.

In a further preferred embodiment of the drilling device according to the invention, the latter has a drilling fluid unit for introducing a flushing fluid into the drilling element, wherein the drilling fluid unit encloses the rear end of the drilling element and is arranged and configured such that a rotation of the drilling element takes place relative to the drilling fluid unit, the drilling fluid unit a conduit port through which the conduit exits the drilling mud unit, and wherein the second conduit end is located outside the drilling mud unit. The drilling fluid may preferably have a plurality of line connections through which a line exits from the drilling fluid. It can also emerge two, three or more lines from a common line connection from the Bohrspüleinheit.

In this embodiment, a drilling fluid unit, for example a flushing head, is provided, via which a flushing fluid is admitted into the drilling element. The flushing fluid used is preferably a liquid which is pumped through the drilling element into the borehole during the drilling process. The rinsing liquid preferably also serves to support the borehole (in particular in the case of uncased bores) and drilled soil and construction material (drill cuttings, overburden, excavation), for example via an annular space which is formed in the borehole around the boring element, from the borehole unsubscribe. Preferably, the rinsing liquid also carries off the frictional heat at the drill bit at the forward end of the drilling element in the advancing direction, reduces the frictional resistance and dampens vibrations occurring at the drilling element. The flushing fluid may comprise or consist of water and / or a suspension. Often suspensions of a clay flour, rock flour, cement or bentonite-water mixture are used.

The drilling fluid is preferably located at the rear end of the drilling element and encloses the rear end. This can for example be implemented so that a flushing head sits on the rear end of the drilling element. Such an arrangement may also be referred to as a central flushing head. In an interior of a housing of the drilling fluid is the flushing fluid, which penetrates from there via the rear end in the drilling element or is pumped. If the rear end of the drilling element is designed, for example, as a hollow tube, surrounds the Bohrläüleinheit this hollow tube so that flushing fluid from the interior of the Bohrspüleinheit penetrates into the open end of the hollow tube and thus enters the interior of the drilling element. The drilling fluid can be connected via a hose which serves as a Bohrspülleitung with a rinsing pump. The flushing pump serves, for example, to introduce the flushing fluid at a high pressure via the hose into the drilling element. The rinsing fluid can for example be sucked in from a rinsing tank by the rinsing pump.

As already described, the drilling element is preferably driven by a drive unit, in particular set in rotation. This rotation of the drilling element is preferably carried out in this embodiment relative to the drilling fluid, d. H. however, the drilling element rotates, but the drilling fluid does not rotate.

The drilling fluid unit preferably comprises a line connection. It is preferred that the line passes through the conduit connection in the interior of the Bohrspüleinheit and there enters the drilling element, for example in the open end of a hollow tube. The first end of the conduit is thus in the drilling member, the second end of the conduit outside the drilling fluid and the conduit extends between these ends in at least a portion of the drilling member, exiting the rear end of the drilling member into the interior of the drilling mud unit and exiting the drilling mud unit through the line connection. The line connection may preferably be formed as a tubular, lateral access.

Since the drilling fluid does not rotate with respect to the drilling element and the line runs in the interior of the drilling element and is preferably not connected to the drilling element, rotation of the line preferably also occurs when the drilling element is rotating. Also the line connection does not turn with. In this way, it is possible to introduce a line in the drilling element, which also during drilling, d. H. can be arranged with driven, rotating drilling element in this drilling element, without causing a co-rotation of the line or the line connection.

This embodiment is based on the finding that in known drilling devices, the drilling fluid units are so connected to the drilling element that the Bohrspülgehäuse co-rotates with the drilling element and an arrangement of a Conduction within the drilling element and a guide through a pipe connection in the drilling fluid would not be possible during the drilling process, as this would lead to a twisting of the line.

The embodiment according to the invention thus permits a rotation-free access of the line into the drilling element, in which the drilling fluid unit does not rotate during a rotation of the drilling element and consequently the line which passes into the drilling element via the line connection of the drilling fluid is not twisted. In this way, the line can remain in the drilling element during the drilling process, d. H. also while the drilling element is being driven and rotating.

The line connection is preferably made fluid-tight. For this purpose, the line connection may, for example, have a sealing element in the form of a sealing ring extending inwardly from the housing of the drilling fluid and surrounding the line, so that a fluid-tight sliding transition between the line and the Bohrspülgehäuse is formed, the same time pushing or pulling the line into or out of the Bohrspülgehäuse out into the Bohrspülgehäuse.

At the point of entry of the drilling element into the drilling fluid, d. H. in the end region of the drilling element, which is enclosed by the drilling fluid, a sealing element is preferably arranged, which forms a fluid-tight transition between the drilling fluid and the drilling element. Further preferably, a sliding construction is arranged at the entry point of the drilling element in the Bohrspüleinheit, which allows a disconnection of the Bohrspüleinheit from the rotational movement of the drilling element. Preferably, the sealing element is designed as a sealing ring and / or the sliding element as a sliding ring.

According to a further preferred development of the drilling device, the drive unit surrounds a tubular portion of the drilling element, wherein the drilling fluid is arranged in the advancing direction behind the drive unit.

Such a construction of a drive unit, for example as a turntable, allows a penetration of the drilling element by the drive unit in such a way that the rear end of the drilling element is not enclosed by the drive unit, but emerges therefrom. As a result, it is realized in a particularly constructive manner that the drilling fluid unit can surround the rear end of the drilling element.

The Bohrläüleinheit can be attached to the drive unit, for example by means of a flange.

In order to enable a pushing through of the drilling element by the drive unit in any length, for example up to about 30 m in length, the drilling fluid is preferably arranged relatively movable to the drive unit. The Bohrläüleinheit is thus preferably not firmly attached to the drive unit. The drilling fluid can be arranged for example on a carriage relatively movable to the drive unit. The carriage is preferably guided on a drill carriage. The carriage may also be guided on an extension element of the drill carriage. The guide of the carriage is preferably carried out by means of clamping on Gleitleisten parallel to the axis of rotation, so that a positive guidance of the carriage is formed. By the possibility of a relative movement, preferably a translational relative movement along the axis of rotation between Bohrspüleinheit and drive unit, among other things, the following advantage can be achieved: Teilbohrelemente a Bohrelements, which are usually 1 to 5 m long, can be pushed independently of length by the drive unit and be clamped anywhere on the drive unit.

In a further embodiment of the drilling device according to the invention, the line comprises an electrical line or signal line.

This enables, in particular, transmission of electrical energy and / or transmission of electrical signals in the line. In particular, an exploratory means arranged at the first line end can thereby be supplied with electrical energy within the drilling element, or signals, for example signals received or generated by the probing means, can be transmitted to the second end of the line.

The electrical line or signal line may be formed as a coaxial cable, which may be formed both for energy transmission or supply and for signal transmission.

A further preferred embodiment of the drilling device according to the invention provides that the line, preferably the first line end, is connected to a probe unit, which is movably arranged in the drilling element. This provides a particularly expedient embodiment of a probing means which is arranged, for example, at the first line end in the drilling element. The probe unit may preferably be arranged and movable substantially along the axis of rotation of the drilling element.

The probe unit may preferably be designed to detect objects located in the ground by means of reflection of electromagnetic waves or electromagnetic radiation. The probe unit may comprise, for example, a metal detector, a magnetometer, a temperature sensor, an (ultrasonic) sound sensor and / or a gas sensor.

It is further preferred that an evaluation unit and / or a control unit is arranged outside the drilling element and more preferably outside the drilling fluid unit and the drive unit. The evaluation unit and / or control unit may preferably be connected to the line, in particular to the electrical line and / or the signal line, at the second line end. For evaluation of signals received by means of the probe unit, the evaluation unit and / or control unit can preferably be connected via the line to a probe unit arranged at the first line end.

Further preferably, the evaluation unit and / or control unit can have a human-machine interface, for example a display unit, by means of which the information obtained from the probe unit and / or control information is reproduced. For example, a signal detected by a metal detector that indicates a metal object in the suspect area may be optically displayed on the display unit. In addition, an acoustic signal can be output by the evaluation unit if the metal detector detects a relevant object. An operator of the evaluation unit can thus close on a relevant object and initiate appropriate measures, such as evacuation measures. Furthermore, a probe unit can preferably be controlled via the control unit, for example by an operator being able to prescribe control measures via a human-machine interface of the control unit.

A further preferred embodiment of the drilling device according to the invention is characterized in that the line comprises an injection line for introducing a medium into the inner region of the drilling element.

Thus, a further possibility of use of the line is provided, so that a medium can be injected by means of the line in the drilling element and outside the same in the wellbore. For example, a medium injected into the drilling element can enter the ground together with or as an alternative to the flushing fluid and develop a desired effect there. Such media include, for example, air, compressed air, water, liquid plastics, plastic blends, suspensions, pastes, contrast agents that may facilitate probing or soil testing in general, pest control media, or neutralizing pollutants present in deeper soil layers. Through the injection of air, especially compressed air, the cuttings can be supported in a simple cased Drehspülverfahren with water flushing. The compressed air accelerates the transport of the soil released from the drill head through the annulus, which is formed by the borehole wall and the outer wall of the drilling element, to the borehole mouth or to the earth's surface. The compressed air also allows the transport of heavy materials, such as gravel and small stones, to the earth's surface, which would not be possible or only with difficulty in a pure water rinse. The same applies mutatis mutandis to a double-cased Drehspülverfahren, in which the dissolved soil but through the annulus, which is formed by two drilling elements, emerges through an ejection opening of the outer tube below the drive unit.

Before, during and after pulling the drilling elements out of a borehole can be through the injection line, for. As an injection tube, compressed air, water or injection means are pumped into a predetermined region of the wellbore. This area may be covered by an injection stocking, an unfoldable sheet, an annular or spherical inflatable bladder, or by a squeezable material, such as plastic. As rubber or plastic limited. As a result, for example, a sealing of the borehole against oppressive groundwater can be achieved, so that it does not get into the borehole or parts of the same and / or can not get out of the borehole to the surface of the earth or come to light. Furthermore, a sealing of the borehole in targeted areas can be made possible so that a separation of the different injection means between the filling, compressing or injecting different areas can take place. Furthermore, it can be made possible by sealing a borehole in a targeted area, so that the injected there, injected or injected injection agent remains and can not escape again, for. B. in other areas of the borehole or from the borehole mouth to the earth's surface. This applies in particular to drill holes that are slightly inclined downwards (≤ 15 ° to the horizontal), horizontally or upwards. The method described here allows different forms of sealing, for example, without prior removal and subsequent replacement of the drill pipes. The method described here is also suitable for the use of electrical lines.

More preferably, the injection tube may be connected to an inflatable rubber ring or rubber stopper. When the drilling element is pulled against the advancing direction, the rubber ring or plug may exit the bit. Then compressed air can be pumped into the rubber ring or stopper until the cavity of the borehole is filled or closed. Only then, for example, the remaining part of the drilling element is pulled. In this way, a limitation of a filling, injection or injection section of the borehole or a separation between several sections can be made possible.

The use of an inflatable rubber ring is particularly useful for limiting a Verspresskörpers of a grout anchor to the air side, so that the force is applied to the ground or rock only where it is intended after the stability calculations, d. H. on a given length, in particular 4 to 10 m, in the lower part of the borehole. In addition, by the use of an inflatable rubber ring, a cavity between the support member of an anchor or pile and the borehole wall or the wall of a recess element can be sealed. Thus, with flat inclined upwards or horizontally directed boreholes filled, injected or injected mass, z. As a cement suspension, remain in the planned area of the borehole or be prevented from escaping from the borehole mouth in the hydraulic gradient. This also applies mutatis mutandis to the sealing of the borehole or recess element against oppressive groundwater, which otherwise emerges from the borehole mouth, rinsing the soil and causing cavities, subsidence and damage.

The conduit and / or the injection tube are always guided within the drilling element. Both can be moved at any time, including during the forward and backward thrust as well as during simultaneous rotation of the drilling element in or opposite to the direction of advance. In this case, they can also be held in their position or moved in the advancing direction during the pulling of the drilling element in or opposite to the advancing direction, for example by means of a unwinding device which is arranged outside the drilling element.

The drilling device may preferably also comprise two or more lines. The two or more lines may be the same type or different types. For example, a drilling device can have or lead an injection line and at the same time an electrical line and / or signal line. A drilling device may also have or lead a plurality of electrical lines and / or signal lines or a plurality of injection lines for the same or different media.

According to a further advantageous embodiment of the drilling device according to the invention, the drilling element at the front end on a drill bit with frictionally recessed drill pins, wherein the drill bit a non-ferromagnetic material and the drill pins comprise a ceramic material or consist thereof.

The use of a non-ferromagnetic material reduces the influence of the drilling element on a probe unit and significantly improves the measurement results or makes them possible. As a result, in particular, a probe unit can be used for the detection of weapons which receives and / or emits electromagnetic waves or radiation.

Preferably, the non-ferromagnetic material may comprise or consist of a non-ferromagnetic metal. More preferably, the non-ferromagnetic material may comprise or consist of a ceramic material, in particular zirconium dioxide.

According to a further advantageous embodiment of the drilling device according to the invention, the drilling element has a non-ferromagnetic material at least in a partial region or consists thereof. In particular, it is preferable to provide a ceramic material in the foremost area.

Thus, a portion of the drilling element is provided in which a probe unit, which operates by means of electromagnetic waves or radiation, is not disturbed by ferromagnetic material. Preferably, in particular that part region (or several subregions) of the drilling element is non-ferromagnetic, in which or in which measurements are to be carried out by means of electromagnetic waves or radiation.

It is particularly preferred that the drilling element comprises or consists of a non-ferromagnetic material in a front region in the advancing direction, the front region preferably comprising a length of 4 to 6 m of the drilling element.

Thus, a portion of the drilling element is provided, which extends from the drill head opposite to the advancing direction and forms a front portion in which the probe unit can be advantageously used during the probing. The preferred order of magnitude of 4 to 6 m is suitably adapted to the probing order of magnitude, ie the usual range of probing elements. At the same time a drilling element is created, which can be produced inexpensively, since only the probing orders of magnitude adapted front portion of the drilling element consists of a non-ferromagnetic material or has this.

Preferably, the non-ferromagnetic material may comprise or consist of a non-ferromagnetic metal. More preferably, the non-ferromagnetic material may comprise or consist of a ceramic material, in particular zirconium dioxide. More preferably, the drill bit and the drill pins, which are recessed there force-fit, the front end of the drilling element and the front portion of a non-ferromagnetic material such as the material designated SBS-A300-W. No. 1.4571-EN10216-5TC1 of the steel plant "Schoeller-Bleckmann Austria". The drilling pins may preferably also consist of a ceramic material, in particular zirconium dioxide.

It is possible, with the use of a boring device with a non-ferromagnetic drill bit and / or a non-ferromagnetic portion of the drilling element, to make measurements with a probing tool in the boring element without having to withdraw the boring element from the borehole for trouble-free measurements to carry out. In particular, this is in cased holes in unstable soils of advantage in which previously - to prevent soil into the well - had to be threaded before retraction of the metal tube, a plastic tube in which the probe unit could be performed.

In this laborious and time-consuming pulling the drilling element from the wellbore (and possibly threading a plastic tube) for each about 0.7 to 0.9 meters drilling depth - depending on the ranges of the probe units used and measurement methods - can when using the preferred training the drilling device are dispensed with. Instead, the drilling element can be left in the borehole and the measurement can be carried out in the area of the non-ferromagnetic drill bit and / or in the non-ferromagnetic portion of the drill element. This can be done during the drilling standstill and particularly advantageous during the drilling drive.

The above-mentioned object is also achieved by a drilling method comprising the steps of: driving an at least partially tubular boring element having an axis of rotation, a front end in a propulsion direction and a rear end in the propulsion direction by means of a drive unit about the axis of rotation and arranging a first line end of a line in the drilling element, guiding the conduit out of the rear end of the drilling element and disposing a second conduit end outside the drilling element.

In the drilling method according to the invention, the drive of the drilling element preferably serves to set a forward end of the drilling element, preferably a drill bit, into a rotation which is required for drilling and the associated removal of drilling material. The placing and guiding of the line allows a line connection from outside into the drilling element - and thus into a borehole - into it. In this way, preparatory and / or accompanying work, for example, the probing of ordnance suspected areas, can be simplified, since a separate introduction of a corresponding line can be omitted. This makes it possible, for example, without removing the drilling element - completely or partially - to remove from the well, to introduce a line in the borehole by the line sections in the drilling element. At the same time the connection of the line, in particular with its second end - outside the drilling element and preferably also outside the drive unit is possible, so that the line can be connected to facilities, for example, for controlling or evaluating transmitted data.

The drilling method according to the invention can, among other things, be developed according to claims 11 to 15.

A preferred embodiment of a drilling method according to the invention comprises the step of moving the conduit, in particular the first conduit end and preferably a conduit section arranged in the drilling element, relative to the drilling element, preferably substantially along the axis of rotation.

More preferably, the method according to the invention comprises the step of moving the conduit in the drilling element during the driving of the drilling element or during a standstill of the drilling element.

According to a further preferred embodiment of the drilling method according to the invention, the method comprises the step of introducing a flushing fluid into the drilling element by means of a drilling fluid unit, wherein the drilling fluid unit encloses the rear end of the drilling element and is arranged and configured such that a rotation of the drilling element takes place relative to the drilling fluid unit the Drilling purging unit has a line connection through which the line exits the Bohrspüleinheit, and wherein the second line end is disposed outside the Bohrspüleinheit.

A further advantageous embodiment of the drilling method according to the invention comprises the steps of moving the line out of a partial area in which a partial drilling element is arranged before the partial drilling element is detached from the drilling element and / or moving the line out of an interface area where a partial drilling element is inserted is before the Teilbohrelement is used.

This embodiment of the drilling method according to the invention is particularly advantageous for use in a drilling apparatus in which the drilling element can be composed of a plurality of partial boring elements. It is in the context of the drilling process usually necessary to solve part of the drilling element and / or partial drilling elements insert into the drilling element, d. H. Connect partial drilling elements to the drilling element or insert partial drilling elements between two sections of the drilling element. The sub-drilling elements are preferably joined together at separation points, preferably by screwing, wherein at the ends of the sub-drilling preferably corresponding threaded portions are formed.

Often, a portion of the drilling element is drilled into the ground in an initial phase of the drilling operation. Once a predetermined portion of the portion is recessed in the ground, a sub-bore member is inserted between two portions of the drilling member to extend the overall bore and continue the bore. When pulling the drilling element out of the borehole, it may be necessary to detach part boring elements from the boring element, i. H. To remove part of the drilling elements between two sections of the drilling element, and thus to facilitate the extraction of the drilling element from the wellbore. During the loosening and / or insertion of partial boring elements, it is preferred that the duct is not located in that portion of the boring element in which the partial boring element to be released or the separating point at which a partial boring element is to be inserted is arranged.

A further preferred embodiment of the drilling method according to the invention comprises the step of probing a bottom region by means of a probe unit preferably arranged on the first line end, in particular during driving of the drilling element or during standstill of the drilling element.

In a preferred development of the aforementioned drilling method, the information obtained by the probing, in particular during the driving of the drilling element or during a standstill of a drilling element, evaluated.

According to a further preferred development of the above-mentioned drilling method, a medium is introduced into the inner region of the drilling element by means of the line, preferably in the form of an injection line, in particular during driving of the drilling element or during standstill of the drilling element.

The drilling method according to the invention and its further developments enable efficient and time-saving probing processes, for example during a drilling operation.

The drilling method according to the invention and its further developments have features or method steps which make them particularly suitable for being used for a drilling device according to the invention and its further developments. For advantages, design variants and details of this drilling method and the further developments of the method, reference is also made to the preceding description of the corresponding device features.

A preferred embodiment of the invention will be described by way of example with reference to the accompanying drawings. Show it:

1 a first embodiment of a drilling device according to the invention,

2 a second embodiment of a drilling device according to the invention and

3 : A schematic flow diagram of a drilling method according to the invention.

1 shows a first exemplary embodiment 1 a boring device according to the invention for producing a borehole, 2 a second exemplary embodiment 1 a drilling device according to the invention for the production of a bore hole. Essentially the same, functionally identical or similar elements are in the 1 and 2 provided with the same reference numerals.

An essentially tubular drilling element 10 is as a hollow drill pipe 11 formed and extends vertically into a borehole 12 , During drilling, the drill pipe rotates 11 around a rotation axis 13 and also moves linearly in a propulsion direction 14 in the borehole 12 into it. This is the borehole 12 through an in drive direction 14 front end 15 of the drill segment 10 deepened or extended.

At the in the direction of advance 14 front end 15 has the drilling element 10 a drill bit 16 on. The drill bit 16 can be open as a tubular body on both sides, ie in and opposite to the direction of advance 14 , namely as a ring bit, as well as in the direction of advance as a closed body, namely as a full drill bit, made of non-ferromagnetic material. In a forward direction of the drill bit in the advancing direction 16 are drilling pins 17 made of non-magnetic material, preferably ceramic material such as zirconia, frictionally embedded. The drilling element 10 exists in a forward direction 14 front area 20 made of a non-magnetic material. Preferably, the front area 20 of the drilling element 10 consist of a non-ferromagnetic material. The front area 20 , which consists of the non-ferromagnetic material, facing from the front end (drill bit 16 ) of the drilling element 10 seen opposite to the direction of advance preferably a length of about 4 m. In particular, it is preferred that also at the front end 15 of the drilling element 10 arranged drill bit 16 made of a non-ferromagnetic material and the non-ferromagnetic inserted there drilling pins 17 preferably of a non-magnetic ceramic material, namely zirconia.

A drive unit 30 surrounds a subarea 31 of the drilling element 10 , This one from the drive unit 30 surrounded subarea 31 forms a tubular portion of the drilling element 10 , The drive unit 30 serves to drive the drilling element 10 around the axis of rotation 13 , That is the drive unit 30 causes the drilling element 10 in a rotational movement about the axis of rotation 13 is offset. In addition, drives the drive unit 30 the drilling element 10 preferably also in the direction of advance 14 on, which causes the drilling element 10 linear in the direction of advance 14 and rotating in the borehole 12 moved into it.

In the in 2 illustrated embodiment, the drive unit comprises 30 a power turret 32 as a hollow drill head and a clamping head 33 , The drive unit 30 is on a sled 34 stored.

The drilling element 10 indicates in the direction of advance 14 rear end 40 on, which in the direction of advance 14 behind the drive unit 30 protrudes from this. The end 40 of the drilling element 10 is an open end.

A drilling fluid 70 encloses the rear end 40 of the drilling element 10 (in the in 2 illustrated embodiment by means of a drill pipe adapter 87 ) with a Bohrspülgehäuse 71 Having an interior of the drilling fluid 70 surrounds. Inside the drilling fluid 70 there is a flushing fluid 72 , preferably a rinsing liquid. The drilling fluid 70 is designed here as a flushing head and has according to the in 2 illustrated embodiment, a purge ring 82 , a flushing ring seal 83 and a ball bearing 84 on. The drilling fluid 70 serves to introduce a flushing fluid 72 in the drilling element 10 , over the open end 40 of the drilling element 10 into the interior of the drilling fluid 70 protrudes. This is the Bohrspülgehäuse 71 with a hose 73 connected. That is the Bohrspülgehäuse 71 has an upper opening 74 on, in which the hose 73 empties. For this purpose the hose is by means of a cuff 75 with an opening nozzle 76 of the Bohrspülgehäuses 71 firmly connected. At one of the Bohrspülgehäuse 71 opposite end of the hose 73 is a flushing pump 77 arranged and with the hose 73 firmly connected. The flushing pump 77 serves to the flushing fluid 72 with high pressure over the hose 73 and the open end 40 of the drilling element 10 in the drilling element 10 contribute. The flushing pump 77 sucks the flushing fluid 72 for example, from a rinsing tank, not shown.

The drilling fluid 70 also has a line connection 85 on, through which a lead 50 from the drilling fluid 70 exit. The fluid-tight outlet of the pipe 50 from the line connection 85 is about a slip ring and a seal 88 (only in 2 shown) between the line 50 and the line connection 85 realized. The administration 50 has a first line end 51 which is in the drilling element 10 is arranged. The administration 50 runs inside the drilling element 10 essentially along the axis of rotation 13 from the first end of the line 51 towards the back end 40 of the drilling element 10 , At the rear end 40 of the drilling element 10 joins the line 50 from the drilling element 10 out into the interior of the drilling fluid 70 and leaves it through the line connection 85 , The line then runs to a second end of the line 52 , The pipe connection 85 is in the range of an upper wall 86 of the Bohrspülgehäuses 71 arranged so that the line 50 suitable from above into the drilling fluid 70 and in the back, open end 40 of the drilling element 10 can be introduced.

That means the first line end 51 the line 50 is in the drilling element 10 arranged. The administration 50 enters from the back end 40 of the drilling element 10 out. The second end of the line 52 is outside the drilling element 10 and outside the drilling fluid 70 arranged. The first line end 51 and one in the drilling element 10 arranged line section 53 are movable in the drilling element 10 arranged and can relative to the drilling element 10 essentially along the axis of rotation 13 to be moved.

The administration 50 is as an electrical line 55 designed to transmit electrical energy and electrical signals. At the first end of the line 51 is the lead 50 with a probe unit 60 connected. By the movement of the line within the drilling element 10 can also use the probe unit 60 be moved within the drilling element substantially along the axis of rotation. The probe unit 60 can be designed as a metal detector for detecting objects made of ferromagnetic material. Furthermore, the probe unit may comprise a temperature sensor, gas sensor or ultrasonic sensor. As a result, objects in the environment, in particular in the direction of advance 14 in front of the front end 15 of the drilling element 10 located objects to be detected. An evaluation unit 65 is with the second end 52 the line 50 connected. The evaluation unit 65 has a display unit 66 on, which by means of the probe unit 60 obtained information reproduces. For example, a detected by means of the probe unit signal via the line 50 to the evaluation unit 65 be transferred and on the display unit 66 be reproduced optically and / or acoustically. An operator of the drilling device 1 This information is provided which allows the operator to decide whether a drilling operation should be canceled and an object, such as a weapon, to be cleared.

The evaluation unit 65 may comprise a control unit, by means of which the probe unit 60 can be controlled. In addition, the control unit can have an actuator, which controllably extends or extends the line, so that the position of the first line end 51 and thus also the probe unit 60 in the drilling element 10 can be adjusted. This can both in the idle state of the drilling unit 10 , as well as during rotation and forward and backward thrust of the drilling unit 10 happen.

The administration 50 can be in addition to the electrical line 55 an injection line 56 comprising, by means of a medium in the inner region of the drilling element 10 can be introduced.

Between the Bohrspülgehäuse 71 and the drilling element 10 are a sealing ring and a sliding ring 80 arranged. The sealing ring forms a fluid-tight transition from the Bohrspülgehäuse 71 to the drilling element 10 , The sliding ring 80 allows disconnection of the drilling fluid 70 from the rotational movement of the drilling element 10 , Thus, the Bohrspülgehäuse encloses 71 the back end 40 of the drilling element 10 such that a rotation of the drilling element 10 relative to the flushing unit 70 takes place, ie while the drilling element 10 rotating and linear in the direction of advance 14 moves, the Bohrspülgehäuse rotates 71 and thus the drilling fluid 70 not with. By means of a flange 81 can the Bohrspülgehäuse 71 and thus the drilling fluid 70 on the drive unit 30 be attached. The drilling fluid 70 is in the direction of advance 14 thus behind the drive unit 30 arranged.

The drilling element 10 consists at least of the partial boring elements 90 and 91 which can be firmly connected together to the drilling element 10 to build. During the drilling process it may be necessary to have partial boring elements, for example the partial boring element 90 to disengage from the drilling element or to insert additional sub-drilling elements into the drilling element or to the drilling element 10 to join. This connection or release is preferably done with the drill element stationary 10 ,

During drilling, the at least partially tubular drilling element is formed 10 from the drive unit 30 driven so that it is about the axis of rotation 13 rotates and also linear in the direction of advance 14 in the borehole 12 moved into it. While drilling, the probe unit can 60 for example, within a drilling element in the front region 10 arranged portion 20 be guided in order to perform measurements near the drill head during drilling. The probe unit 60 For example, in another, in the direction of advance 14 further back arranged portion of the drilling element 10 be arranged, for example, when the probe unit 60 is very sensitive and should not be damaged (say by cuttings) or if the range of the probe unit 60 can bridge such a distance well.

Because the drilling element 10 in a direction of advance 14 front area 20 and preferably also the drill bit arranged there 16 with the inserted drill pins 17 each consist of a non-magnetic material, by means of the probe unit 60 Measurements can be made with electromagnetic radiation without making these measurements through the material of the drilling element 10 or the drill bit 16 with the drill pins 17 to be influenced.

The second end of the line 52 is preferably always outside the drilling element 10 , the drive unit 30 and the drilling fluid 70 arranged. During drilling or during a standstill of the drilling element 10 For example, the conduit may be connected to the first conduit end relative to the drilling element 10 essentially along the axis of rotation 13 to be moved. In addition, especially during drilling, the flushing fluid 72 in the drilling element 10 by means of the drilling fluid 70 introduced, wherein the rotation of the drilling element 10 relative to the drilling fluid 70 takes place, ie the drilling fluid 70 stands still or without rotation moves in or opposite direction of advance.

Before a part of the drilling element 10 is solved, the line becomes 50 , in particular the first line end 51 and the probe unit disposed thereon 60 , preferably from the portion of the drilling element 10 out moves, in which the partial drilling element to be solved is arranged. Before a partial drilling element with the drilling element 10 is connected or in the drilling element 10 is used, the line becomes 50 , in particular the first line end 51 and the probe unit disposed thereon 60 , preferably from an interface area 92 In which the sub-drilling elements are connected, moved out.

A probing of the soil by means of the probe unit can take place while the drilling element 10 from the drive unit 30 is driven or while the drilling element 10 stationary.

2 shows an embodiment of a drilling method according to the invention 100 , Here is the drilling method 100 schematically shown as a flowchart. The method is described with reference to a in 1 shown drilling device 1 for carrying out the drilling method according to the invention. In the 2 shown and described here below steps need not be performed in this order, but can also be done in a different order. In particular, steps may be continued, interrupted, resumed, or repeated as other steps are taken.

In one step 110 becomes an in 1 shown tubular trained drilling element 10 around a rotation axis 13 driven. The driving takes place by means of a in 1 shown drive unit 30 which the drilling element 10 in a rotational movement about the axis of rotation 13 and a linear propulsion movement in a propulsion direction 14 added.

In a further process step 120 becomes an in 1 shown first line end 51 a line 50 in the drilling element 10 , especially in an interior of a hollow drill pipe 11 arranged. In addition, in the process step 120 The administration 50 from one in 1 shown rear end 40 of the drilling element 10 brought out and one in 1 shown second line end 52 outside the drilling element 10 and outside the drive unit 30 arranged.

In a further process step 130 will the in 1 shown line 50 relative to the drilling element 10 essentially along the axis of rotation 13 emotional. In particular, the in 1 shown first line end 51 and one in the drilling element 10 arranged line section 53 relative to the drilling element 10 emotional.

In another process step 140 becomes an in 1 shown flushing fluid 72 in the drilling element 10 by means of a drilling fluid 70 brought in. This encloses a Bohrspülgehäuse 71 (Flushing head) of the drilling fluid 70 the back end 40 of the drilling element 10 , The drilling fluid 70 is arranged and configured such that a rotation of the drilling element 10 relative to the drilling fluid 70 he follows. This means, for example, that the drilling fluid 70 does not rotate while the drilling element 10 rotating and moving linearly in the direction of advance. The drilling fluid 70 has a line connection 85 on, through which the line 50 from the drilling fluid 70 exit. In addition, the second line end 52 outside the drilling fluid 70 arranged.

In a further process step 160 will the in 1 shown line 50 from a partial area in which a partial drilling element 90 is arranged, moved out before the part drill 90 from the drilling element 10 is solved.

In a further process step 170 will the in 1 shown line 50 from an interface area 92 on which a partial drilling element is inserted, moved out before the partial drilling element is inserted.

In a further process step 180 is a floor area by means of a in 1 shown probe unit 60 probed. The probing may in particular during the in step 110 successive driving of the drilling element 10 or during a standstill of the drilling element. The term "probing" is to be understood in particular as meaning that the probe unit detects or detects objects which are in the advancing direction 14 in front of the drill bit 16 are located. These are in particular objects which have a ferromagnetic material or consist of this, z. As ammunition, bombs, metallic ground wires or other metallic objects in the underground such as gas and oil tanks, water tanks, etc.

Hereinafter, a preferred embodiment as a variant of the in 1 shown embodiment, in which the Bohrspüleinheit 70 preferably relatively movable to the drive unit 30 is arranged to push through the drilling element 10 through the drive unit 30 in any length, for example, up to about 30 m in length. Equally on this Variant applicable reference numerals of in 1 shown embodiment are used. The features and advantages mentioned herein may be implemented individually or in combination with one or more other features.

An extension of the drilling element 10 by means of screwing or locking with further partial boring elements 90 and or 91 , in particular up to a length of 30 m, takes place, for example, in the following steps:
First, this is done by the drive unit 30 pushed partial drilling element 91 by means of a clamping head 33 within the drive unit 30 clamped. Then, the rear end of the Teilbohrelements 91 in the direction of advance 14 seen through the slip ring 80 with seal in the Bohrspülgehäuse 71 guided. During subsequent drilling, the sub-drill becomes 91 with the drilling fluid 70 and the drive unit 30 in the direction of advance 14 along the axis of rotation 13 rotated by a length of a Teilbohrelements while producing a hole rotating and flushing. This will be the Bohrläüleinheit 70 and the drive unit 30 each guided separately on a carriage and preferably by means of non-positive connection. The two slides are in turn by means of clamping on Gleitleisten a drill mount 93 guided, preferably positively guided. The drill carriage 93 has an upper end 96 and a lower end 97 on.

The sled 34 the drive unit 30 is preferably by means of a console with a piston of a forward and retraction unit, in particular a hydraulic cylinder, which is located between two equipped with wear strips U-profiles 98 the drill carriage 93 is, positively connected. The piston, which can be pushed in and out hydraulically on the cylinder, enables the carriage to be pushed back and forth 34 with the drive unit 30 on the drill rig 93 , This can alternatively be done electromechanically or electro-hydraulically by means of an endless link chain.

As in particular in 2 It can be seen, is the sled 35 the drilling fluid 70 along the drill carriage 93 or the extension elements 95 same led. In this case, the carriage 35 about the connection of drilling fluid 70 , Drilling element 10 , Drive unit 30 and carriages are connected to a fore and aft unit. The pre-and retraction unit can the carriage 35 the drilling fluid 70 on the drill rig 94 and the extension elements 95 the drill carriage 93 over a length of up to approx. 30 m in the direction of advance 14 or opposite to the direction of advance 14 move. This is for the drive unit 30 with the sledge 34 on the drill rig 93 only an arbitrarily short feed travel, for example, about 1 to 5 m, required.

A clamping device at the bottom 97 the drill carriage 93 serves to the drilling element 10 while holding the chuck 33 is solved and the drive unit 30 in the direction of advance 14 or opposite to the direction of advance 14 for example, 1 to 5 m above the drilling element 10 moved and there by means of clamping head again with the drilling element 10 is positively connected. The aforementioned steps, ie the extension of the drilling element 10 , can be repeated several times until the total feed path of the drilling fluid 70 by means of the carriage on the drill carriage 94 and the extension elements 95 the drill carriage 93 is reached or until the largest possible length of the drilling element 10 comprising the partial boring elements 90 and or 91 is reached.

Will become a drilling element through the steps described above 10 made, which serves to create a borehole of a certain length, this drilling element 10 for producing equal or shorter borehole lengths without altering the boring element 10 be reused. For shorter borehole lengths then projects a corresponding excess length of the drilling element 10 or the partial drilling elements 90 and or 91 from the borehole. The removal of partial drilling elements 90 and or 91 ) and the drilling fluid 70 as well as the line 50 is not necessary in such cases for the production of additional holes. The use of the line 50 is with all movements of the drilling element 10 , ie rotation and forward and reverse thrust, simultaneously with and without supplying a flushing fluid possible.

Removing or shortening a drilling element 10 or partial drilling element 90 and or 91 can accordingly in reverse order to install or extend a drilling element 10 or partial drilling element 90 respectively.

The extension elements 95 the drill carriage 93 can be made in lightweight construction. These only carry the sled 35 the drilling fluid 70 during forward and reverse thrust and hold the drilling fluid 70 simultaneously from the rotational movement of the drilling element 10 from. In addition, the extension elements lead 95 the drilling elements 10 in a linear axis of rotation parallel to the drill carriage. The of the drive unit 30 on the drilling element 10 and the partial drilling elements 90 and or 91 transmitted rotational and forward and backward forces and the resulting reaction forces need only from the carriage 34 the drive unit 30 and taken up by the lower part of the drill carriage. Only this part of the drill rig must be designed and manufactured with sufficient stability. For example, this part of the drill rig depending on the requirements and spatial conditions of the site a length of about 2 to 7 m in general and in some rare special cases a length of up to about 50 m.

LIST OF REFERENCE NUMBERS

1

execution

10

drilling element

11

drill pipe

12

well

13

axis of rotation

14

drive direction

15

Front end of the drilling element 10

16

drill bit

17

Drill bit

20

front portion of the drilling element

30

drive unit

31

Part of the drilling element

32

Top drive

33

clamping head

34

Carriage of the drive unit

35

Sledge of the drilling fluid

40

rear end of the drilling element

50

management

51

first line end

52

second line end

53

line section

55

electrical line

56

injection line

60

probe unit

65

evaluation

66

display unit

70

Bohrspüleinheit

71

Bohrspülgehäuse

72

flushing fluid

73

tube

74

upper opening

75

cuff

76

opening socket

77

irrigation pump

80

sliding ring

81

flange

82

flushing ring

83

Spülringdichtung

84

ball-bearing

85

line connection

86

wall

87

Drill pipe adapter

88

Slide ring and seal

90

Teilbohrelement

91

Teilbohrelement

92

Interface Area

93

drill mount

94

drill mount

95

extension element

96

Upper end of the drill carriage

97

lower end of the drill carriage

98

U-profile of the drill carriage

Claims (15)

Drilling device for producing a ground hole, comprising: - an at least partially tubular drill element ( 10 ) with a rotation axis ( 13 ), one in a forward direction ( 14 ) front end ( 15 ) and a rear end in the advancing direction ( 40 ), - a drive unit ( 30 ) for driving the drilling element ( 10 ) around the axis of rotation ( 13 ), and - a line ( 50 ) whose first line end ( 51 ) in the drilling element ( 10 ), the line ( 50 ) from the rear end ( 40 ) of the drilling element ( 10 ) and a second line end ( 52 ) outside the drilling element ( 10 ) is arranged. Drilling device according to the preceding claim, wherein the line ( 50 ), in particular the first line end ( 51 ) and preferably in the drilling element ( 10 ) arranged line section ( 53 ), relative to the drilling element ( 10 ), preferably substantially along the axis of rotation ( 13 ), is movably arranged. Drilling device according to one of the preceding claims, with a drilling fluid ( 70 ) for introducing a flushing fluid ( 72 ) in the drilling element ( 10 ), the drilling fluid unit ( 70 ) the rear end ( 40 ) of the drilling element ( 10 ) and arranged and configured such that a rotation of the drilling element ( 10 ) relative to the drilling fluid ( 70 ), whereby the drilling fluid unit ( 70 ) a line connection ( 85 ), through which the line ( 50 ) from the drilling fluid ( 70 ), and wherein the second line end ( 52 ) outside the drilling fluid ( 70 ) is arranged. Drilling device according to the preceding claim, wherein the drive unit ( 30 ) a tubular section ( 31 ) of the drilling element ( 10 ), and wherein the drilling fluid ( 70 ) in the advancing direction ( 14 ) behind the drive unit ( 30 ) is arranged. Drilling device according to one of the preceding claims, wherein the line ( 50 ) an electrical line ( 55 ) or signal line. Drilling device according to one of the preceding claims, wherein the line ( 50 ) with a probe unit ( 60 ), which in the drilling element ( 10 ) is movably arranged. Drilling device according to one of the preceding claims, wherein the line ( 50 ) an injection line ( 56 ) for introducing a medium into the inner region of the drilling element ( 10 ). Drilling device according to one of the preceding claims, in which the drilling element ( 10 ) at the front end ( 15 ) a drill bit ( 16 ) with non-positively inserted drilling pins ( 17 ), wherein the drill bit ( 16 ) comprises a non-ferromagnetic material and the drilling pins ( 17 ) in particular comprise or consist of a ceramic material. Drilling device according to one of the preceding claims, in which the drilling element ( 10 ) at least in a subarea ( 20 ) comprises or consists of a non-ferromagnetic material and in particular a ceramic material in the foremost region. Drilling device according to the preceding claim, wherein the drilling element ( 10 ) in a forward direction ( 14 ) front area ( 20 ) comprises or consists of a non-ferromagnetic material, preferably the front region ( 20 ) a length of 4 to 6 m of the drilling element ( 10 ). Drilling method comprising the steps of: - driving ( 110 ) of an at least partially tubular drill element ( 10 ) with a rotation axis ( 13 ), one in a forward direction ( 14 ) front end ( 15 ) and in a forward direction ( 14 ) rear end ( 40 ), by means of a drive unit ( 30 ) around the axis of rotation ( 13 ), and - arranging ( 120 ) of a first line end ( 51 ) of a line ( 50 ) in the drilling element ( 10 ), Leading the line ( 50 ) from the rear end ( 40 ) of the drilling element ( 10 ) and arranging a second line end ( 52 ) outside the drilling element ( 10 ). Drilling method according to the preceding claim, comprising the step: - moving ( 130 ) of the line ( 50 ), in particular the first line end ( 51 ) and preferably one in the drilling element ( 10 ) arranged line section ( 53 ), relative to the drilling element ( 10 ), preferably substantially along the axis of rotation ( 13 ). Drilling method according to one of the two preceding claims, with the step: - introducing ( 140 ) of a rinsing fluid ( 72 ) in the drilling element ( 10 ) by means of a drilling fluid ( 70 ), the drilling fluid unit ( 70 ) the rear end ( 40 ) of the drilling element ( 10 ) and arranged and configured such that a rotation of the drilling element ( 10 ) relative to the drilling fluid ( 70 ), whereby the drilling fluid unit ( 70 ) a line connection ( 85 ), through which the line ( 50 ) from the drilling fluid ( 70 ), and wherein the second line end ( 52 ) outside the drilling fluid ( 70 ) is arranged. Drilling method according to one of the two preceding claims, comprising the step: - moving ( 160 ) of the line ( 50 ) out of a partial area in which a partial drilling element ( 90 ) is arranged before the sub-drilling element ( 90 ) of the drilling element ( 10 ) is solved and / or - moving ( 170 ) of the line ( 50 ) out of an interface area ( 92 ) to which a partial drilling element is inserted before the partial drilling element is inserted. Drilling method according to one of the preceding claims 11 to 14, comprising the step: - probing ( 180 ) of a bottom region by means of a, preferably at the first end of the line ( 51 ), probe unit ( 60 ), in particular during the driving of the drilling element ( 10 ) or during a standstill of the drilling element ( 10 ).

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