Drill pipe, and system and method for laying a pipeline

Abstract

The invention relates to a drill pipe for use in creating a borehole in soil from a starting point to a target point along a predetermined borehole line, in particular for laying underground cables or underground conduits near the surface in the soil, wherein the borehole is driven by means of a drilling device with a drilling tool for loosening the soil when advancing the drill pipes, wherein the drill pipe has at least one connection section at each of its ends for a tensile-resistant detachable connection with a further element of a drill string, that the drill pipe has at least one element for establishing a tensile-resistant connection with a corresponding element of a feed device for advancing and / or retracting the drill pipe into the borehole, and that an outer wall of the drill pipe is made in one piece.Furthermore, the invention relates to a device for moving at least one drill pipe into or out of a borehole, as well as a system and a method for doing so.

Description

[0001] The invention relates to a drill pipe for use in creating a borehole in the ground from a starting point to a target point along a predetermined bore line, in particular for laying underground cables or underground lines near the surface in the ground, wherein the borehole is opened by means of a drilling device with a drilling tool for loosening the ground as the drill pipes are advanced. Furthermore, the invention relates to a device for moving at least one drill pipe into or out of a borehole, in particular when creating a borehole near the surface in the ground from a starting point to a target point and / or when inserting a pipeline or underground line or an underground cable into the ground from a starting point to a target point or in the opposite direction, comprising at least one base, at least one abutment, and at least one actuator for moving the at least one drill pipe, which is operatively connected to the base.with a transmission element that is operatively connected to the actuator for transmitting the movement caused by the at least one actuator to the at least one drill pipe, as well as a system and a method for creating a borehole from a starting point to a target point in the ground along a predetermined borehole line, in particular for laying underground cables or underground lines near the surface in the ground, wherein the borehole is opened by means of a drilling device with a drilling tool for loosening the ground by advancing drill pipes.

[0002] When constructing a power grid, for example when building a 380 kV line, it is necessary not only to build overhead lines but also to lay these lines underground.

[0003] Open trench construction is used for the near-surface laying of underground cables, underground lines, and also pipes (such as pipelines). This sometimes leads to considerable interventions along the route and is associated with a considerable amount of work in excavating and backfilling the trench. For the construction of a 380 kV cable route, for example, two trench profiles, each 5.5 m wide and 2.15 m deep, have to be created. Separating the individual soil layers has proven to be particularly complex, requiring several separate piles. This is necessary in order to restore the soil quality to its original state when the trench is later backfilled. Furthermore, an area of ​​approximately 40 m must be kept clear for construction work, while a cable protection strip of approximately 23 m must be kept accessible after completion of the construction work.These interventions during the construction phase and the impacts after completion of the work within the framework of open installation justify the need to develop a needs-based underground installation method.

[0004] To minimize environmental impacts during the construction phase and minimize construction costs, it is necessary to achieve long trench lengths. Trench lengths of up to 1,500 m or more are desirable. Problems with near-surface installation include the limited cover of the pipeline and, in some cases, the short distance between the individual boreholes (both may be as little as 2 to 6 m each). The diameter of the pipelines to be installed here is in the range of less than 500 mm, often even less than 300 mm.

[0005] Trenchless drilling methods from pipeline construction (microtunneling, HDD) are already available, but it has not yet been readily possible to cover the necessary parameters with these methods.

[0006] Drilling techniques already exist that can cover the desired diameter range. However, for technical reasons, these methods are limited to much shorter distances, primarily due to the supply of drilling fluid. For example, microtunneling techniques up to 300 mm are used. For a section length of up to 1.5 km, microtunneling techniques with a diameter of approximately 1000 mm would currently be required. However, the space required for site equipment and costs increase significantly with increasing diameters. Therefore, this technique has not been economically viable to date. Furthermore, microtunneling pipes are simply plugged in, meaning they can only transmit compressive forces, not tensile forces.

[0007] Using the Horizontal Directional Drilling (HDD) method, a laydown would be conceivable in terms of the diameter and length requirements. This method is already used specifically for crossing rivers or roads. With this method, a pilot bore is first created using a rotating drill head and drill rod from the starting point towards the target point. Positional accuracy is ensured by a surveying system installed behind the drill head. The excavated material is brought to the surface with a bentonite slurry. The bentonite slurry is pumped through the drill rod directly to the nozzles attached to the drill head. The slurry mixes with the loosened soil and flows back to the starting point through the annular space between the drill rod and the ground. However, high flushing pressures are required to ensure the clean removal of the loosened soil.To prevent unwanted mud leakage at the surface, the HDD method requires installation depths and thus overburden of more than 30m. The drill pipes of the pilot drill string are coupled together via a force-locking connection, whereby the drill pipes are directly screwed together via a screw thread connection. This also connects the drive of the so-called HDD rig. Screwing the drill string elements together requires a corresponding setup time.

[0008] Developments in drilling and pumping technology with regard to supplying the drilling rig with drive and flushing fluid have made it possible to overcome the 1000 mm diameter barrier for the use of microtunneling techniques, for example. However, the gradual installation of drill pipes is problematic due to the regular extension of the supply lines for the drilling rig and the removal of drill cuttings. For installation lengths of up to or more than 1500 m, this results in significant performance losses due to setup times.

[0009] Furthermore, with regard to the installation of near-surface lines, it is necessary to insert a pipeline, particularly advantageously made of plastic (other materials such as polymer concrete, GRP, or similar are also possible), into the ground after or during the borehole, in order to then lay the line into it. The problem here is that it is not possible to create the borehole directly by inserting plastic pipes into the ground, as the plastic pipe is not suitable for transmitting the necessary forces without damage, especially when laid over long lengths. It is therefore necessary to use drill pipes that are suitable for providing the necessary forces required for drilling. Here, too, the successive insertion described above is problematic.

[0010] Once the target point is reached, the drilling rig is removed. The installed drill pipes are then removed, and the plastic pipe is inserted into the ground at the same time or at a later time. This requires transferring tensile forces to and through the drill pipes, and, accordingly, after removing a drill pipe from the borehole, separating it from the drill string for reuse.

[0011] The object of the invention is therefore to overcome the aforementioned disadvantages, in particular to reduce the set-up times and to make tensile forces transferable in the drill string.

[0012] This object is achieved with regard to a first solution by a drill pipe in a first embodiment in that the drill pipe has at least one connection section at each of its ends for a tensile, releasable connection to another element of a drill string, that the drill pipe has at least one element for establishing a tensile connection to a corresponding element of a feed device for advancing and / or retracting the drill pipe into the borehole, and that an outer wall of the drill pipe is designed in one piece.

[0013] It has been surprisingly shown that such a drill pipe can be used to easily provide a tensile drill string that is designed for advancement and / or retraction.

[0014] A further solution to the problem provides, with regard to the drill pipe in a second embodiment, that the drill pipe has at least one connection section at each of its ends for tensile, releasable connection to another element of a drill string, that the drill pipe has at least one element for establishing a tensile connection to a corresponding element of a feed device for advancing and / or retracting the drill pipe into the borehole, and that the drill pipe consists of at least two formwork elements which can be connected axially to the drill pipe.

[0015] By dividing the drill pipe into formwork elements, it is possible to lay the supply lines of the drilling device in a hose package in a lower section of the formwork elements and to close them off with the other formwork elements like a lid. The supply lines can therefore be arranged, for example, on a reel along the entire bore length. Splitting the supply lines in microtunneling is eliminated or reduced, significantly reducing setup times.

[0016] A further teaching of the invention provides that at least one connecting region of a formwork element is provided with at least one seal. This makes it easy to ensure pressure tightness of the drill pipe.

[0017] A further teaching of the invention provides that the connection via the respective connecting sections of the drill pipe to another element of the drill string takes the form of a positive and / or non-positive connection. A further teaching of the invention provides that the drill pipe has a first connecting section at its first end and a second connecting section corresponding to the first connecting section at its opposite second end.

[0018] It is advantageous that the first connecting section and the second corresponding connecting section form a flange connection in the assembled state, which has connecting elements and / or holes for attaching a bolt connection. This allows a tensile-resistant connection between the drill pipes to be created simply and cost-effectively.

[0019] Alternatively, it is advantageous for the first connecting section and the second corresponding connecting section to form a tensile-resistant plug-in socket connection, wherein one connecting section is a spigot end and the other connecting section is a corresponding socket, each of which has at least one corresponding recess in the opposing surface, which, when assembled, forms a groove into which at least one shear element can be inserted to establish the tensile-resistant connection. In this way, it is possible to easily provide a tensile-resistant connection between the drill pipes. Surprisingly, it has been shown that such a connection can also be used with drill pipes.

[0020] A further teaching of the invention provides that the element for establishing a tensile connection with the corresponding element of the feed device is a recess in the outer wall of the drill pipe. This makes it easy to enable the drill pipe to be moved in a tensile manner using a moving device such as a press frame, with a significant reduction in setup time.

[0021] A further teaching of the invention provides that the recess can be provided with a cover. This is advantageous for preventing stones and the like from becoming stuck in the recess in the ground.

[0022] A further teaching of the invention provides that the element for establishing a tensile connection with the corresponding element of the feed device is an element of a tensile push-in socket connection. This makes it easy to enable the drill pipe to be moved in a tensile manner via a movement device such as a press frame, with a significant reduction in setup time.

[0023] A further teaching of the invention provides that the drill pipe has at least one line section arranged in the outer wall and / or in the interior of the drill pipe on the outer wall and running parallel along the outer wall, wherein the at least one line section has a connecting element at its ends for establishing a connection between line sections of interconnected drill pipes or elements of the drill string. The lines serve, for example, to transport bentonite, as a drive line for driving a pump, as a feed line for the removal of drilling cuttings, for the introduction of electrical lines, as a high-pressure line or as a delivery line for the mixture of drilling fluid and drilling cuttings / loose soil. The lines have, for example, a plug-in sleeve system with seals if necessary, so that the lines can be plugged into one another.This allows the setup times for the supply lines to be reduced considerably.

[0024] Advantageously, the drill pipes according to the invention have a length of more than 8m. This also significantly reduces setup times.

[0025] A further teaching of the invention provides that the drill pipe has at least one recess in its wall for establishing a connection with a feed device for advancing and / or retracting the drill pipe into the borehole. This can create a positive connection for easier transmission of feed forces to the outer surface.

[0026] A further teaching of the invention provides that at least one handling element has an element for establishing a connection with a formwork element, for example in the form of a gripping element that preferably engages in a recess in the surface of the formwork element, a magnetic element, or a suction or vacuum element. This allows a simple way to provide a holding connection for lifting the formwork element.

[0027] A further solution of the invention provides with regard to the device for moving that a guide element is provided which is movable relative to the base and operatively connected to the transmission element, that the transmission element has at least one form-locking element for transmitting the movement, which is designed such that a tensile-resistant, detachable connection exists between the transmission element and the drill pipe.

[0028] In this way, it is easily possible to transfer tensile forces to a drill string consisting, among other things, of drill pipes, in particular as described above.

[0029] A further teaching of the invention provides that the at least one actuator is a hydraulic cylinder and / or a rack and pinion drive. These are advantageously simple actuators that are capable of providing the required forces with low maintenance.

[0030] A further teaching of the invention provides that the form-locking element has at least one engagement element which provides the tensile-resistant, releasable connection by engaging in an engagement section of the drill pipe, preferably on its outer wall. It is advantageous that the at least one engagement element is designed such that it encompasses the drill pipe, with the form-locking element preferably having at least two engagement elements which are particularly preferably arranged to be movable horizontally and / or vertically in the form-locking element. This makes it possible to easily provide a releasable connection for power transmission with minimal setup time. In particular, horizontal / vertical movement of the engagement elements allows considerable setup time savings.

[0031] A further teaching of the invention provides that the at least one engagement element is a connection section corresponding to a connection section of the drill pipe. It is advantageous in this case that the connection sections form a tensile-resistant plug-in socket connection, wherein the engagement element is either a spigot end or a socket corresponding to the spigot end, each of which has at least one corresponding recess in the opposing surfaces, which, when assembled, form a groove into which at least one shearing element can be inserted to establish the tensile-resistant connection. This makes it easy to provide a detachable connection for power transmission with little setup time. In particular, the insertion and removal of the at least one shearing element allows considerable setup time to be saved.

[0032] A further teaching of the invention provides that a starting seal is provided, preferably in connection with the base.

[0033] A further solution of the invention provides a device for assembling a previously described drill pipe for use in creating a borehole from a starting point to a target point in the ground along a predetermined bore line, in particular for laying underground cables or underground lines close to the surface in the ground, wherein the borehole is opened by means of a drilling device with a drilling tool for loosening the ground by advancing the drill pipes, with a feed area for the formwork elements, with an assembly area for connecting the formwork elements, with handling elements for receiving, moving and positioning the formwork elements in the assembly area, with at least one feed element and / or at least one rotating element for positioning the formwork elements in the assembly area.

[0034] A further teaching of the invention provides that the formwork elements can be positioned around a supply line of the drilling device.

[0035] A further teaching of the invention provides that at least one handling element has a gripping element for establishing a connection with a formwork element, which preferably engages in a recess in the surface of the formwork element.

[0036] A further teaching of the invention provides that the handling elements are movable horizontally and vertically so that the formwork elements can be moved from the feed area to the assembly area.

[0037] A further solution of the invention provides with regard to the system that the drill pipes are the drill pipes described above, and that a feed device as described above is provided for moving the drilling device via the advancement of the drill string.

[0038] When using the two-part drill pipes, it is advantageous that a previously described device for mounting a drill pipe is provided.

[0039] A further teaching of the invention provides that the drill pipes are arranged in the drill string in such a way that the axial connecting areas of the formwork elements are offset from one another.

[0040] A further solution of the invention provides with regard to the method that the previously described drill pipes are used, which are mounted to a drill string and moved in the borehole by means of a previously described feed device.

[0041] When using the two-part drill pipes, it is advantageous that a previously described device for assembling a drill pipe is used.

[0042] A further teaching of the invention provides that the drill pipes are arranged in the drill string in such a way that the axial connecting areas of the formwork elements are offset from one another.

[0043] The above-described inventive solutions are not limited to the near-surface installation of pipelines, underground cables, or underground lines in the ground. Rather, the aforementioned task can also be applied to conventional microtunneling with larger diameters, for example, with concrete pipes. Here, too, the inventive solutions can reduce setup times and essentially eliminate the problems of extending supply lines and installing thrust pipes in the drilling area with regard to installations and supply lines.

[0044] Furthermore, the drill pipe can also be a product pipe that remains in the ground as such and is not removed from the ground again to pull in the product pipe.

[0045] The invention is explained in more detail below using an exemplary embodiment in conjunction with a drawing. The drawings show: Figure 1A, 1B a side view of a first embodiment of a drill pipe according to the invention, Figure 2A a first connecting section of the drill pipe according to the invention, Figure 2B a second connecting section of the drill pipe according to the invention, Figure 2C the connecting section to Figure 2A without cover, Figure 2D a side view to Figure 2C , Figure 3A the connecting section of two interconnected drill pipes according to the invention, Figure 3B a sectional view of Figure 3A , Figure 4Aa spatial view of a first embodiment of a device according to the invention for moving a drill pipe in a first position, Figure 4B a spatial view of the device according to the invention for moving a drill pipe in a second position, Figure 5A a spatial view analogous Figure 4A with the first embodiment of the drill pipe according to the invention, Figure 5B a spatial view analogous Figure 4B with the first embodiment of the drill pipe according to the invention Figure 5C a top view of Figure 5A , Figure 5D a top view of Figure 5B , Figure 6A a side view of a first transmission element according to the invention of the first embodiment of the device according to the invention with engagement elements in a first position, Figure 6B an analogous view to Figure 6A with engagement elements according to the invention in a second position, Figure 7a schematic representation of a first system according to the invention in a spatial view after completion of the drilling process, Figure 8 a schematic representation in spatial view at the beginning of the pulling in of the cable, and Figure 9 a sectional view of a second embodiment of the invention of two interconnected drill pipes according to the invention in a second embodiment. Fig. 10 a schematic representation of a second embodiment of the system according to the invention in side view, Fig. 11 a top view of Fig. 10 , Fig. 12 a spatial view of Fig. 10 , Fig. 13 to 19 a schematic representation of an embodiment of an assembly device according to the invention with the individual assembly steps, Fig. 20 a spatial schematic representation of a third embodiment of a drill pipe according to the invention, Fig. 21 a spatial schematic representation of two connected drill pipes, Fig. 22a side view to Fig. 21 , and Fig. 23 a spatial schematic representation of a formwork element.

[0046] Figure 1A, 1B show a side view of a first embodiment of a drill pipe 10 according to the invention. The drill pipe 10 has a first connection section 11 at its first end and a second connection section 12 at its opposite second end, wherein the first connection section 11 corresponds to the second connection section 12 in that they can be connected to one another or inserted into one another. The first connection section 11 and the second connection section 12 are provided such that, in a first embodiment according to the invention, they form a flange connection, wherein the first connection section 11 has a support section 13 in which bores 14 are provided. Behind the support section 13, a recess 15 is provided in the outer wall 16 of the drill pipe 10. (See Figures 2A to 2D ). Corresponding to the holes 14, recesses 17 are provided in the recess 15. Furthermore, holes 18 are provided in the support section 13, which are designed so that centering pins 19, which are provided on the second connecting section 12, can engage in them.

[0047] The second connection section 12 also has a support element 20 on which bolts 21 are either fixedly arranged or in which bores 31 are provided which contain a thread into which loose bolts 21 are screwed into the recesses 17 through the bores 14 into the threaded bores 31 in the support section 20.

[0048] The recess 15 can be closed with a cover 22. The cover 22 is secured in the recess 15, for example, by means of screws. The cover serves to prevent objects from accumulating in the recess 15 or in the recesses 17 while the drill pipe 10 moves in the borehole.

[0049] Several lines are permanently arranged inside the drill pipe 10. These are a conveyor line 23 for transporting loosened soil or drilling cuttings in conjunction with drilling fluid / drilling / bentonite suspension, a grouting line 24, with which, for example, a bentonite suspension is introduced for introduction as a lubricant between the drill pipes and the borehole wall, a drive line 25, with which, for example, drive fluid is transported to the drilling device in order to drive any jet pump (not shown) present there, a feed line 26, with which, for example, a bentonite suspension is transported to the drill head, with which the drilling cuttings or loosened soil is then transported out of the borehole and the working face is supported in front of the drilling tool, and a channel 27, in which, for example, high-pressure lines for spraying the cutting tools or electrical lines for supplying power to the drilling device are provided.

[0050] The lines are connected via a plug-in sleeve system, whereby the first connection section 11 has spigot ends 28 provided with seals, whereas the second connection section 12 has sleeves 29 into which the spigot ends 28 of the lines 23-26 and, if applicable, 27 engage. This is made, for example, of Figure 3B visible.

[0051] Figure 3A and Figure 3B show a first drill pipe 10 connected to a second drill pipe 10' via a flange connection 30. The first connection section 11 of the first drill pipe 10 is connected to the second connection section 12 of the drill pipe 10'. The support section 13 and the support section 20 touch each other. The bolts 21 are screwed through the bores 14 into the threaded bores 31. For this purpose, the bolts 21 are inserted into the recesses 17 and into the bores 14 of the support section 13 of the first connection section 11.

[0052] To connect the first connection section 11 to the second connection section 12, the drill pipes 10, 10' are arranged relative to one another so that the centering pins 19 can be inserted into the corresponding bores 18. In this case, the spigot ends 28 of the lines 23-27 should also correspond to the sockets 29 of the lines 23-26 and 27, respectively. The drill pipes 10, 10' are then pushed toward one another so that the spigot ends 28 snap into the socket 29. The bolts 21 are then inserted into the recesses 17 and pushed into the bores 14. The bolts 21 are then screwed into the threaded bores 31 of the support section 20 of the second connection section 12.

[0053] The drill pipe 11' is then detached from the drill pipe 10 by unscrewing the bolts 21 from the threaded holes 31 and removing the bolts 21 from the recesses 17. The drill pipe 10' can then be removed from the drill string, whereby the spigot ends 28 of the lines 23-26 and 27 are separated from the socket 29 of the lines 23-26 and 27, respectively.

[0054] Figure 4A and Figure 4Bshow a spatial view of a device 40 according to the invention for moving at least one drill pipe into or out of a borehole, in particular when creating a borehole near the surface in a ground 100 from a starting point 101 to a target point 102 and / or when inserting a pipeline, underground line, or underground cable 105 into the ground 101 from a starting point 101 to a target point 102 or in the opposite direction. This is referred to below as press frame 40. The press frame 40 has a base 41 having a frame-shaped structure. Rails 42 are provided on the base 41, on which guide elements 43 are provided, which can be moved on the rails 42. The transmission element 44 is arranged on the guide elements 43.

[0055] An abutment 45 is arranged on the abutment 45, directly or operatively connected to the base 41. Two actuators 46, which here are designed as double-stroke cylinders 47, are connected to this. A double-stroke cylinder 47 has two hydraulic cylinders 48, which are connected to one another via a plate 49. The cylinders 48 are designed here as telescopic cylinders. The plate 49 is also connected to a guide element 43, so that the plate 49 can be moved and guided on the rails 42. The double-stroke cylinders 47 are designed such that, when fully extended, they can move the transmission element 44 essentially to the front end of the base 41 on the opposite side of the abutment 45.

[0056] Supports 50 are provided on the base 41, on which a drill pipe 10 or another element of the drill string can be placed. The supports 50 are vertically erected when a drill pipe 10 is to be placed thereon. During the movement of the transmission element 44 with respect to the base 41, the supports 50 are folded away horizontally. (See Figure 4B ).

[0057] Figure 5A to Figure 5D show a drill pipe 10 with its second connection section 12 pointing toward the borehole. Here, a starting seal (not shown) would also be provided at the end of the base 41 facing the borehole. The first connection section 11 or its recess 15 forms a positive connection with an engagement element 53 of the transmission element 44, in that the engagement element 53 engages in the recess to enable movement of the drill pipe 10.

[0058] The transmission element 44 has a connecting plate 51, which is engaged by the double cylinders 47. The transmission element 44 has an opening 52 into which the drill pipe 10 is inserted. Furthermore, a form-locking element is provided, which in this case has two engagement elements 53. The engagement elements 53 are each connected to a hydraulic cylinder 54, which are aligned horizontally. The engagement elements 53 are provided to be horizontally movable with respect to the transmission element 44. Here, the movement is preferably carried out by the hydraulic cylinders 54. The engagement elements 53 can be moved from an open position ( Figure 6A ) into a closed engagement position ( Figure 6B). In the engagement position shown here, the engagement elements 53 engage in the recesses 15 of the drill pipe 10 and thus create a positive connection between the drill pipe 10 and the press frame 40. The actuators 46 can move the transmission element 44 along the rails 42 towards or away from the borehole. The positive connection of the engagement elements 53 with the recess 15 allows both compressive and tensile forces to be applied so that the drill pipe 10 can be moved out of or into the borehole. Alternatively, the engagement elements 53 can also consist of several elements that are moved spatially, or with two engagement elements 53, a vertical movement is also possible.

[0059] On the rear side of the transmission element 44, connections 55 are provided for the lines 23-26 and 27, respectively, which function as quick connectors with the lines 23-26 and 27, respectively. With regard to the channel 27, it may be necessary to manually insert hoses or lines into a new drill pipe to be connected before connecting and to couple them with the hoses or lines of the previous drill pipe 10' in the channel 27. It is also possible to keep couplings to a minimum by making these lines or hoses longer than a drill pipe 10.

[0060] Figure 7shows a schematic representation of the system according to the invention in a spatial representation. A starting pit 101 is provided in the ground 100, from which a bore (not shown) is created to a target pit 102. A press frame 40 is provided in the starting pit 101. The distance between a starting pit 101 and a target pit 102 can be up to 1500 m or more. Figure 7it can be seen how a drilling device 103 has arrived in the target pit 102. The drilling device 103 is then detached from the drill string and removed from the target pit 102. An adapter 104 is arranged on the first drill pipe 10 of the drill string, which adapter is connected to a protective pipe 105 to be laid or, if this is not necessary, directly to the underground line or cable. In the starting pit, in this embodiment, the press frame 40 is turned over so that the abutment 45 is located at the borehole starting point (not shown) and is supported there. Alternatively, it is also possible for the press frame 40 to be designed so that the necessary forces are available both in the extension direction of the hydraulic cylinders 48 and in the retraction direction of the hydraulic cylinders 48, so that the press frame does not have to be turned.

[0061] During the drilling process, individual drill pipes 10 or several already connected drill pipes are connected to the drill string and pushed into the ground 100 through the press frame 40. The drill pipes 10 are removed by being pulled out of the borehole by the press frame 40. Once a drill pipe 10 has been completely pulled out, it is separated from the drill string and removed, for example, as previously described. Alternatively, several drill pipes connected to form a drill string section can also be disassembled. When the drill pipes are pulled out, the protective pipe 105 or the ground line or the ground cable is simultaneously inserted directly into the borehole in the ground 100.

[0062] As an alternative to the flange connection 30, a tensile socket connection 32 for connecting two drill pipes 10, 10' in a second embodiment is Figure 9The tensile socket connection 32 has a spigot end 33 and a socket 34. These are Figure 9shown connected. The spigot end 33 has a connecting surface 35 and the socket 34 has a connecting surface 36. At least one recess 37 is provided in the connecting surface 35 and at least one corresponding recess 38 is also provided in the connecting surface 36. When the spigot end 33 is pushed into the socket 34, the connecting surfaces 35, 36 touch and the recesses 37, 38 form a groove 39. A shear element 60 is inserted in the groove 39 to create the tensile connection. Alternatively, several grooves 39 and shear elements 60 can be provided. Additionally, if necessary, it is possible to provide at least one seal 61 between the connecting surfaces 35, 36. Fixed lines / channels 23 - 27 can also be provided accordingly inside the drill pipes 10, 10' with tensile plug-in socket connection 32.

[0063] Depending on which connection section 11, 12 is to be connected to the transmission element 44, an alternative embodiment in connection with the press frame 40 provides that either a spigot end 33 or a sleeve 34 is provided as the transmission element 44 or its engagement element 53 for producing a tensile plug-in sleeve connection 32.

[0064] Fig. 10 to 12 show a schematic representation of another embodiment of the system according to the invention in side view. A starting pit 101' is provided in the ground 100', from which a bore 102' is created from a starting point to a target point (not shown) using the microtunneling method. A scaffold 104' is provided in the starting pit, which may function as a support for the starting pit 101' and in which the components of the system according to the invention are provided.

[0065] A feed unit 103', for example a pipe thruster or a press frame 40, is arranged in the starting pit 101', with which a drill string 110 is pushed or shoved into the borehole 102'. A drilling device 106, with which the borehole 102' is created, is provided at the front end 105' of the drill string 110. The drilling device 106 is supplied with energy and drilling slurry for transporting the loosened cuttings via supply lines 108. The supply lines 108 are provided outside the starting pit 101', for example, on reels (not shown), and are unwound, bundled (position 109), and inserted into the borehole as the drilling progresses.

[0066] The drill string here consists of 10" drill pipes in the third design, which are Fig. 20 to 23 are shown.

[0067] The drill pipe 10" shown here as an example consists of two formwork elements 11', 12', which are preferably identical in design. It is easily possible to use more than two formwork elements 11', 12' if this would be advantageous.

[0068] At its front end 13' and at its rear end 14', the drill pipe 10" has a connecting flange 15'. For this purpose, recesses 17' are recessed into a wall 16' of the formwork element 11', 12'. Corresponding to the recesses 17', bores 18' are provided, into which connecting bolts 20' can be inserted. These are screwed with nuts 19'. This creates a force-locking connection between the individual drill pipes 10". A seal (not shown) can be inserted into a recess 21' provided in the flange 15' in the area of ​​the bores 18'. Alternatively, the drill pipes 10" can be connected in a form-fitting manner, for example using engagement elements (not shown). A material connection is also possible, although in this case, simple separation of the drill pipes from one another after removal is not possible.

[0069] Furthermore, a recess 22' is provided in the wall 16', which serves as an application point for the force introduction for advancing or retracting the drill string 110 via the feed unit 103'.

[0070] Furthermore, recesses 23' are provided in the wall 16', which are bordered on one side by a web 24'. Bores 25' are provided in the recesses 23' and the web 24'. This also represents a flange-like connection option for the formwork elements 11', 12', which are arranged on top of one another. Bolts 26' can also be used here, which are screwed together with nuts 27'. This creates an axial connection of the formwork elements 11', 12' along a connecting line 28'. A recess 29' is also provided in the web 24', into which a seal (not shown) can also be inserted.

[0071] In order to enable a better positioning of the drill pipes 10" relative to each other or of the formwork elements 11', 12' relative to each other, bores 30' and positioning pins 31' are arranged on or at the web 24' or the front or rear end 13', 14' of the drill pipe 10", which engage with each other when correctly positioned.

[0072] In order to achieve better stability of the drill string 110, the drill pipes 10" are arranged offset from each other by 90 degrees, for example, as shown in Fig. 21 , 22 is shown.

[0073] The assembly of the 10" drill pipes and the subsequent connection of the 10" drill pipes to each other to form the drill string 110 takes place in an assembly device 400. This includes, as shown in the Fig. 13 to 19 , a frame 410 in which a feed area 430 and an assembly area 420 are provided. The supply lines 108 run through the assembly area 420.

[0074] The feed area 430 comprises an outer area 440 and an inner area 450. In the outer area 440, as shown here by way of example, a drill pipe 10", which is composed of two formwork elements 11', 12' but is not yet locked, is arranged on a carriage 460, which can be moved on guide elements 470 from the outer area 440 into the inner area. This position is in Fig. 13 shown.

[0075] The assembly device 400 comprises, for example, two handling elements 500, 510. The upper handling element 500 and the lower handling element 510 are each arranged vertically movable on the frame 410. The upper handling element 500 comprises gripping elements 520 that grip the upper formwork element 12. The lower handling element 510 comprises a support 530 on which the lower formwork element 11' rests.

[0076] In Fig. 14The upper handling element 500 is lowered onto the upper formwork element 12' and the grippers 520 are engaged. At the same time, the lower handling element 510 is raised so that the drill pipe 10" emerges from the carriage 460 so that it can be moved back into the outer area 440. Subsequently, the upper handling element 500 is raised together with the upper formwork element 12' and the lower handling element 510 is lowered ( Fig. 15 ). Both handling elements 500, 510 are then moved from the feed area 430 into the assembly area 420 and moved so that the formwork elements 11', 12' are seated on top of each other again. ( Fig. 16). The shell elements 11', 12' of the drill pipe 10" are locked and then connected to each other. The drill pipe 10" is then rotated if necessary, moved toward the borehole 102' against the drill string 110, and connected to it. All components of the device 400 then release the drill pipe 10", and the drill string 110 is pushed into the borehole 102' by the feed unit 103'.

[0077] Further preferred embodiments with regard to the production plant, the process and the control system are listed below: 1. A drill pipe for use in drilling a borehole in the ground from a starting point to a target point along a predetermined drilling line, in particular for laying underground cables or underground lines close to the surface. The borehole is drilled by means of a drilling device with a drilling tool for loosening the ground as the drill pipes are advanced. The drill pipe has at least one connecting section at each of its ends for a tensile, releasable connection to another element of a drill string. The drill pipe has at least one element for establishing a tensile connection to a corresponding element of a feed device for advancing and / or retracting the drill pipe into the borehole. An outer wall of the drill pipe is constructed in one piece. 2. A drill pipe for use in drilling a borehole in the ground from a starting point to a target point along a predetermined drilling line.in particular for the near-surface laying of underground cables or underground lines in the ground, wherein the borehole is opened by means of a drilling device with a drilling tool for loosening the ground as the drill pipes are advanced, characterized in that the drill pipe has at least one connecting section at each of its ends for a tensile, releasable connection to another element of a drill string, that the drill pipe has at least one element for establishing a tensile connection to a corresponding element of a feed device for advancing and / or retracting the drill pipe into the borehole, and that the drill pipe consists of at least two formwork elements that can be connected axially to the drill pipe. 3. Drill pipe according to embodiment 2, characterized in that at least one connecting region of a formwork element is provided with at least one seal. 4. Drill pipe according to one of embodiments 1 to 3, characterized in thatthat the connection via the respective connecting sections of the drill pipe to another element of the drill string is made in the form of a positive and / or non-positive connection. 5. Drill pipe according to one of embodiments 1 to 4, characterized in that the drill pipe has a first connecting section at its first end and a second connecting section corresponding to the first connecting section at its opposite second end. 6. Drill pipe according to embodiment 5, characterized in that the first connecting section and the second corresponding connecting section, in the assembled state, form a flange connection which has connecting elements and / or bores for attaching a bolt connection. 7. Drill pipe according to embodiment 5, characterized in that the first connecting section and the second corresponding connecting section form a tensile-resistant plug-in socket connection.wherein one connection section is a spigot end and the other connection section is a corresponding sleeve, each having at least one corresponding recess in the opposite surface, which in the assembled state forms a groove into which at least one shear element can be inserted to establish the tensile-resistant connection. 8. Drill pipe according to one of the embodiments 1 to 7, characterized in that the element for establishing a tensile-resistant connection with the corresponding element of the feed device is a recess in the outer wall of the drill pipe. 9. Drill pipe according to embodiment 8, characterized in that the recess can be provided with a cover. 10. Drill pipe according to one of the embodiments 1 to 7, characterized inthat the element for establishing a tensile connection with the corresponding element of the feed device is an element of a tensile plug-in socket connection. 11. Drill pipe according to one of embodiments 1 to 10, characterized in that the drill pipe has at least one line section arranged in the outer wall and / or in the interior of the drill pipe on the outer wall and running parallel along the outer wall, wherein the at least one line section has a connecting element at its ends for establishing a connection between line sections of interconnected drill pipes or elements of the drill string. 12. Device for moving at least one drill pipe, in particular in the form of a drill pipe according to one of embodiments 1 to 11, into or out of a borehole,in particular when drilling a borehole close to the surface in the ground from a starting point to a target point and / or when installing a pipeline, underground line or underground cable into the ground from a starting point to a target point or in the opposite direction, with at least one base, with at least one abutment, with at least one actuator for moving the at least one drill pipe, which is operatively connected to the base, with a transmission element which is operatively connected to the actuator, for transmitting the movement caused by the at least one actuator to the at least one drill pipe, characterized in that a guide element is provided which is movable relative to the base and operatively connected to the transmission element, that the transmission element has at least one form-fitting element for transmitting the movement, which is designed in such a way thatthat a tensile, releasable connection exists between the transmission element and the drill pipe. 13. Device according to embodiment 12, characterized in that the at least one actuator is a hydraulic cylinder and / or a rack and pinion drive. 14. Device according to embodiment 12 or 13, characterized in that the form-locking element has at least one engagement element that provides the tensile, releasable connection by engaging in an engagement section of the drill pipe. 15. Device according to embodiment 14, characterized in that the at least one engagement element is designed such that it encompasses the drill pipe, wherein the form-locking element preferably has at least two engagement elements, which are particularly preferably arranged to be movable horizontally and / or vertically in the form-locking element. 16. Device according to embodiment 14, characterized inthat the at least one engagement element is a connection section corresponding to a connection section of the drill pipe. 17. Device according to embodiment 16, characterized in that the connection sections form a tensile-resistant plug-in sleeve connection, wherein the engagement element is either a spigot end or a sleeve corresponding to the spigot end, each of which has at least one corresponding recess in the opposing surfaces, which in the assembled state form a groove into which at least one shear element can be inserted to establish the tensile-resistant connection. 18. Device according to one of embodiments 12 to 17, characterized in that a starting seal, preferably in connection with the base,is provided. 19. Device for assembling a drill pipe according to one of the embodiments 2 to 11 for use in creating a borehole from a starting point to a target point in the ground along a predetermined bore line, in particular for laying underground cables or underground lines close to the surface in the ground, wherein the borehole is opened by means of a drilling device with a drilling tool for loosening the ground by advancing the drill pipes, with a feed area for the formwork elements, with an assembly area for connecting the formwork elements, with handling elements for receiving, moving, and positioning the formwork elements in the assembly area, with at least one feed element and / or at least one rotating element for positioning the formwork elements in the assembly area, wherein the formwork elements can be positioned around a supply line of the drilling device. 20. Device according to embodiment 20, characterized in thatthat at least one handling element has an element for establishing a connection with a formwork element, for example in the form of a gripping element, which preferably engages in a recess in the surface of the formwork element, a magnetic element, or a suction or vacuum element. 21. Device according to embodiment 19 or 20, characterized in that the handling elements are horizontally and vertically movable, so that the formwork elements can be moved from the feed area to the assembly area. 22. System for use in creating a borehole from a starting point to a target point in the ground along a predetermined bore line, in particular for laying underground cables or underground lines close to the surface in the ground, wherein the borehole is opened by means of a drilling device with a drilling tool for loosening the ground by advancing drill pipes, characterized inthat the drill pipes are drill pipes according to one of the embodiments 1 to 11, and that a feed device is provided for moving the drilling device via the advancement of the drill string according to one of the embodiments 12 to 18. 23. System according to embodiment 22, characterized in that a device for assembling a drill pipe according to one of the embodiments 19 to 21 is provided. 24. System according to embodiment 23, characterized in that the drill pipes are arranged in the drill string such that the axial connecting regions of the formwork elements are offset from one another. 25. Method for creating a borehole from a starting point to a target point in the ground along a predetermined bore line, in particular for the near-surface laying of underground cables or underground lines in the ground,wherein the borehole is opened by means of a drilling device with a drilling tool for loosening the ground by advancing drill pipes, characterized in that drill pipes according to one of the embodiments 1 to 11 are used, which are mounted to a drill string and moved in the borehole by means of a feed device according to one of the embodiments 12 to 18. 26. Method according to embodiment 25, characterized in that a device for assembling the drill pipe according to one of the embodiments 19 to 21 is used. 27. Method according to embodiment 26, characterized in that the drill pipes are arranged in the drill string such that the axial connecting regions of the formwork elements are offset from one another. List of reference symbols 10, 10', 10" drill pipe 27 channel 11 first connecting section 27' Mother 1 1'Formwork element 28 spiky end 12 second connection section 28' connecting line 12' Formwork element 29 sleeve 13 Carrier section 29' Deepening 13' front end 30 flange connection 14 drilling 30' drilling 14' rear end 31 threaded hole 15 Deepening 31 'Positioning pins 15' connecting flange 32 tensile socket connection 16 exterior wall 33 spiky end 16' wall 34 sleeve 17 recess 35 connecting surface 17' Deepening 36 connecting surface 18, 18` bore 37 Deepening 19 Centering pin 38 Deepening 19' Mother 39 Nut 20 Carrier section 40 Device / press frame 20' Connecting bolt 41 base 21 bolt 42 rail 21' Deepening 43 Guide element 22 cover 44 transmission element 22' Deepening 45 abutment 23 conveyor line 46 Actuator 23' Deepening 47 Double-stroke cylinder 24 Injection line 48 cylinder 24' web 49 plate 25 Drive line 50 Support 25' drilling 51 Connection plate 26 feed line 52 opening 26' bolt 53 engagement element 54 hydraulic cylinder 55 Connection 60 Shear element 100, 100' Floor 101, 101' Starting pit 102 Target pit 102' borehole 103 drilling device 103' feed unit 104 adapter 104' scaffolding 105 Protective pipe / underground cable / underground line 105' front 106 drilling device 108 supply lines 109 position 110 drill string 400 Mounting device 410 frame, frame 420 Assembly area 430 Feeding area 440 outer area 450 inner area 460 Dare 470 Guide element 500 upper handling element 510 lower handling element 520 gripping element 530 Edition

Claims

1. Drill pipe for use in creating a borehole in a ground from a starting point (101) to a target point (102) along a predetermined bore line, in particular for laying underground cables or underground lines (105) close to the surface in the ground (100), wherein the borehole is opened by means of a drilling device (103) with a drilling tool for loosening the ground (100) when advancing the drill pipes (10), wherein the drill pipe (10) has at least one connecting section (11, 12) at each of its ends for a tensile, releasable connection to a further element of a drill string, wherein the drill pipe (10) has at least one element for establishing a tensile connection with a corresponding element of a feed device (40) for advancing and / or retracting the drill pipe (10) into the borehole, and wherein an outer wall (16) of the drill pipe (10) is designed in one piece, and wherein the connection via the respective Connecting sections (11,12) of the drill pipe (10) with a further element of the drill string in the form of a positive connection, wherein the drill pipe (10) has at its first end a first connection section (11) and at its opposite second end a second connection section (12) corresponding to the first connection section, , characterized in thatthe first connecting section (11) and the second corresponding connecting section (12) form a tensile-resistant plug-in sleeve connection (32), wherein one connecting section is a spigot end (33) and the other connecting section is a corresponding sleeve (34), each of which has at least one corresponding recess (36, 37) in the opposite surface (35, 36), which in the assembled state forms a groove (39) into which at least one shearing element (60) can be inserted to produce the tensile-resistant connection, and that the drill pipe (10) has at least two line sections (23, 24, 25, 26, 27) arranged in the interior of the drill pipe (10) on the outer wall (16) and running parallel along the outer wall (16), wherein the at least two line sections (23, 24, 25, 26, 27) each have a connecting element at their ends (28) for establishing a connection between line sections (23, 24, 25, 26,27) interconnected drill pipes (10).

2. Drill pipe according to claim 1, characterized in that the element for establishing a tensile connection with the corresponding element of the feed device (40) is a recess (15) in the outer wall (16) of the drill pipe (10).

3. Drill pipe according to claim 2, characterized in that the recess (15) can be provided with a cover (22).

4. Drill pipe according to one of claims 1 to 3, characterized in that the element for establishing a tensile connection with the corresponding element of the feed device is an element (60) of a tensile plug-in sleeve connection (32).

5. Drill pipe according to one of claims 1 to 4, characterized in that the drill pipe (10) has substantially the diameter of the drilling device (103).

6. System for use in the creation of a borehole from a starting point to a target point in the ground along a predetermined borehole line, in particular for the near-surface laying of underground cables or underground lines in the ground, wherein the borehole is driven by means of a drilling device with a drilling tool for loosening the ground by advancing drill pipes, characterized in thatthe drill pipes are drill pipes according to one of claims 1 to 5, and that a feed device for moving the drilling device by advancing the drill string into or out of a borehole, in particular when creating a borehole near the surface in a ground (100) from a starting point (101) to a target point (102) and / or when inserting a pipeline, underground line or underground cable (105) into the ground from a starting point (101) to a target point (102) or opposite, with at least one base (41), with at least one abutment (45), with at least one actuator (46) for moving the at least one drill pipe (10), which is operatively connected to the base (41), with a transmission element (44), which is operatively connected to the actuator (46), for transmitting the movement caused by the at least one actuator (46) to the at least one drill pipe (10), characterized in thata guide element (43) is provided which is movable relative to the base (41) and operatively connected to the transmission element (44), the transmission element (44) having at least one form-locking element for transmitting the movement, which is designed such that a tensile, releasable connection exists between the transmission element and the drill pipe, wherein the form-locking element has at least one engagement element which provides the tensile, releasable connection by engaging in an engagement section of the drill pipe, wherein the at least one engagement element is designed such that it encompasses the drill pipe, or the at least one engagement element is a connection section corresponding to a connection section of the drill pipe, wherein the connection sections form a tensile flange connection or a tensile plug-in socket connection, wherein the engagement element is either a spigot end or a socket corresponding to the spigot end,which each have at least one corresponding recess in the opposing surfaces, which in the assembled state form a groove into which at least one shear element can be inserted to produce the tensile-resistant connection.

7. System according to claim 6, characterized in that at least one actuator is a hydraulic cylinder and / or a rack and pinion drive.

8. System according to claim 7, characterized in that the form-locking element has at least two engagement elements.

9. System according to claim 8, characterized in that the engagement elements are arranged to be movable horizontally and / or vertically in the form-locking element.

10. System according to claim 6, characterized in that Near the surface means a laying depth of 2 to 6 m.

11. A method for creating a borehole from a starting point to a target point in the ground along a predetermined borehole line, in particular for laying underground cables or underground lines close to the surface in the ground, wherein the borehole is opened by means of a drilling device with a drilling tool for loosening the ground by advancing drill pipes, characterized in that a system according to one of claims 6 to 10 is used, in which Drill pipes according to one of claims 1 to 6 are used, which are mounted to a drill string and moved in the borehole by means of the feed device.

12. Method according to claim 11, characterized in that Near the surface is understood to mean a laying depth of 2 to 6 m.

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