Drilling device and drilling method for creating a shaft

Abstract

The invention relates to a device for drilling a substantially vertical bore (100) in the ground (200), in particular for creating a shaft, from a starting point to a target point, comprising: * a plurality of lining elements (115) for producing a lining (110) of the bore (100); * a drilling machine (20) for producing the bore (100) in the ground (200), which drilling machine is arranged in at least one lining element (115), * a drill head (30) having a main body (32) for connecting to a drilling machine (20), * a pushing unit (50) provided at the starting point (101) and having at least one actuator (51) for pressing the lining elements (115) into the ground and / or for generating a pressing force acting on the drill head (30) during drilling; * at least one conveying device which conveys the material removed by the drill head (30) out of the receiving container (36) of the drill head (30) behind the drilling tools (31) through the drilling machine (20).

Description

[0001] KLIC KOW & WETZ EL

[0002] PARTNERSHIP COMPANY MBB PATENT ATTORNEYS EUROPEAN PATENT AND TRADEMARK ATTORNEYS

[0003] JESSENSTRASSE 4 22767 HAMBURG GERMANY

[0004] Applicant: Herrenknecht AG www.klickow-wetzel.de

[0005] Schlehenweg 2, 77963 Schwanau, Germany Phone: +49 (0)40 380 8715-0 Fax: +49 (0)40 380 8715-25 Email: mail@klickow-wetzel.de

[0006] HKN-235-PCT

[0007] November 7, 2025 / pwi.pwi

[0008] Drilling device and drilling method for creating a shaft

[0009] The invention relates to a device for drilling a substantially vertical borehole in the ground, in particular for creating a shaft, from a starting point to a target point. The invention further relates to a drill head for drilling a substantially vertical borehole in the ground, in particular for creating a shaft.

[0010] The process of drilling vertical boreholes to create shafts is well-known. Shaft drilling machines are among the tools used for this purpose.

[0011] US3379264A discloses a vertical shaft drilling rig in which both a pilot bore is drilled prior to the main borehole and a vertical borehole is drilled from solid rock without a pilot bore. In stable rock formations, a drilling rig is wedged into the drilled borehole, which has no lining. This rig has a rotating drill head with a base body to which drilling tools are attached at V-shaped sections. These V-shaped sections are fixed to the drill head. In the variant with a pilot bore, the drilling tools create V-shaped flanks during the preparation of the pilot bore, causing the excavated material to slide down the flanks into the pilot bore and be removed, for example, by a bucket chain. In the variant without a pilot bore, the drill head of the drilling rig has a central drilling area, which also features drilling tools similar to those on the drill arms.A suction conveying system (air lift) is provided for transporting the dissolved material.

[0012] US4186808A also discloses a vertical shaft drilling machine. In stable rock formations, a drilling machine is positioned in the created borehole, which has no lining. With this machine, the vertical bore is created without a shaft. Drilling tools are provided at the lower end of a central, rotatable section of the drilling machine. Furthermore, the drill head has arms fixed to the central section, which also have drilling tools. During drilling, flanks are created along these arms, causing the excavated material to slide towards the center. A suction system for the excavated material is provided in the center.

[0013] US4274675A also discloses a vertical shaft drilling rig. In stable rock formations, a drilling rig is positioned in the excavated borehole, which has no lining. This drilling rig has a drill head with drilling tools for advancing a pilot hole. It is equipped with a screw conveyor that runs centrally through the shaft and transports the excavated material to a skip on an upper loading platform located above a drilling platform. The platforms are connected by feed cylinders. During drilling, the feed cylinders push the drilling platform toward the face to generate the necessary pressure. The platforms have cylinder assemblies that allow them to be anchored independently to the vertical shaft wall. The shaft drilling rig has a rotating cutter head located laterally and above the pilot drill unit.This milling head is designed to remove material from the shaft floor in a spiral pattern, efficiently conveying it towards the center, i.e., towards the pilot bore. The Fries drill head moves along a ring-shaped track around the central section of the drilling machine, which is located on the lower platform.

[0014] US4448269A discloses a rotating drill head for a reverse circulation shaft drilling machine. The drill head is used in stable rock formations without support structures. The drill head is connected to a surface drive via a hollow drive shaft, which is also used to convey the excavated material. The drill head has a central section with drilling tools for creating a pilot hole. It also features diagonally outward and upward-projecting arms on which drilling tools are mounted. The excavated material is conveyed by these arms into the pilot hole area and extracted there.

[0015] A disadvantage of the aforementioned shaft drilling machines and their drill heads is that the rock in which drilling takes place must be stable. The drilling machines are clamped directly to the borehole without any support structure. Furthermore, the disclosed shaft drilling machines are complex designs that require a specific borehole length and a minimum diameter for vertical drilling to be economical or even usable. If the boreholes are to be drilled near the surface, stable rock is usually not present, at least in some sections, so the rock must be extensively treated to enable the use of these shaft drilling machines. If the borehole is short or has a small diameter, these drilling machines cannot be used, or at least not economically.Furthermore, in some cases with the drilling device described above, it is necessary for a person to be present in the borehole during drilling.

[0016] For shorter boreholes or boreholes with a smaller diameter, it is common practice to use an excavator. A disadvantage of this method is that at least one person must be inside the shaft during the drilling process. To secure the shaft wall, reinforcement is installed and then backfilled with shotcrete. This also requires stable rock formation. If stable rock is not present, it must undergo extensive treatment to make such drilling possible. This can be achieved, for example, by freezing, lowering the groundwater level, or injecting binding agents. Such measures are not readily feasible, particularly in built-up and populated areas.

[0017] The object of the invention is therefore to overcome the aforementioned disadvantages and to provide a drilling device, a drill head, and a drilling method with which the creation of near-surface vertical boreholes is economically feasible even in unstable areas. Preferably, it is also possible to create such a vertical borehole without personnel regularly being present in the borehole during operation.

[0018] To solve the problem according to the invention, the device is disclosed and claimed, which is characterized by:

[0019] • a plurality of components for creating a borehole lining;

[0020] • a drilling machine for creating the borehole in the ground, which is arranged in at least one building element,

[0021] • a drill head with a base body for connection to a drilling machine, with a central section as a drilling section with at least one drilling tool and / or as a guide section, which is connected to the base body, o with at least one arm element with at least one drilling tool and / or a driver for conveying loosened material, which is arranged on the base body so as to pivot horizontally about a pivot point, o with a receiving container for receiving loosened material, which is provided on the central section on the side opposite the at least one drilling tool, KLIC KOW & WE TZ EL

[0022] • a thrust unit provided at the starting point, with at least one actuator for pressing the support elements into the ground and / or for generating a pressing force acting on the drill head during drilling; and

[0023] • at least one conveying device that conveys the material loosened by the drill head from the drill head's receiving container behind the drilling tools through the drilling machine.

[0024] The automated installation of the support material reliably stabilizes the borehole, even in unstable rock formations. The extendable arm elements allow for undercutting of the support material, enabling precise placement. Furthermore, the pivoting mechanism allows for a compact drill head geometry, enabling drilling with small diameters. Near-surface installation is also possible.

[0025] One aspect of the invention provides that the drill head has two end stops per arm element, which, depending on the direction of rotation of the drill head, limit the arm element's pivoting movement between an extended drilling position and a folded transport position. It has been shown that this allows for reliable and simple folding and unfolding. The folding and unfolding movement is preferably effected by friction between the drilling tools and the surrounding rock.

[0026] A further aspect of the invention provides that the drill head has at least one conveying opening in the central section and / or in the base body, through which the material removed by the at least one drilling tool of the at least one arm element can be conveyed into the receiving container. It has been shown that this allows for efficient and particularly simple material removal.

[0027] A further aspect of the invention provides that the drill head has at least one receiving element on its central section for conveying the loosened material into the receiving container. This allows the material loosened by the drilling tools on the central section to be easily conveyed away.

[0028] A further aspect of the invention provides that the at least one actuator of the thrust unit is a hydraulic cylinder or a rack and pinion drive. It has been shown that this allows the necessary movement to be provided in a simple and cost-effective manner. KLIC KOW & WE TZ EL

[0029] A further aspect of the invention provides that at least two support elements are connected to each other in a tensile-resistant manner and / or that at least one sealing element is provided between the support elements. This rigid connection makes it possible, if necessary, to lift the support using the sliding mechanism. The light elements allow for a particularly simple way to achieve watertightness or reduced water ingress into the bore through the support.

[0030] A further aspect of the invention provides that a lifting system, preferably a strand lifting system, is provided for braking or lifting the drilling rig. This allows the effect of the weight force on the drill head to be easily controlled.

[0031] A further aspect of the invention provides that the thrust unit has at least one holding device that can be detachably connected to a support element. It has been shown that this provides a particularly simple way to connect the thrust force to the support. A further advantage is that by providing a second holding device, the support can be prevented from being locked against movement into or out of the borehole (pipe brake) when no thrust movement is being carried out by the thrust unit.

[0032] A further aspect of the invention provides that the holding device has at least one releasable holding element. This allows a holding connection to be provided in a simple manner. Advantageously, the holding element has two sections that can be pivoted relative to each other.

[0033] A further teaching of the invention provides that the at least one releasable retaining element can be placed at least around a mounting element, and / or can be locked with at least one actuator.

[0034] A further aspect of the invention provides that at least one actuator of the holding element is a clamping cylinder. This allows the necessary clamping force to be applied to the holding element in a simple manner.

[0035] Another aspect of the invention provides that the drilling machine has a drive for rotating the drill head. [KLIC KOW & WE TZ EL]

[0036] A further aspect of the invention provides that the drilling machine has a machine frame on which a locking system for securing the drilling machine in at least one mounting segment is located. This allows for a simple locking mechanism for the drilling machine within the mounting, capable of reliably transferring the forces occurring during drilling into the mounting.

[0037] Another teaching of the invention provides that the drilling machine has a central tube, preferably in the middle, through which a conveying device for removing material loosened by the drill head passes through the drilling machine.

[0038] Another teaching of the invention provides that the central tube has an insertion funnel.

[0039] Another aspect of the invention provides that the central tube is connected to the receiving container.

[0040] To solve the problem according to the invention, a drill head for drilling a substantially vertical bore in the ground, in particular for creating a shaft, is further provided with a base body for connection to a drilling machine, with a central section as a drilling section with at least one drilling tool and / or as a guide section, which is connected to the base body, with at least one arm element with at least one drilling tool and / or a carrier for conveying loosened material, which is arranged on the base body so as to be pivotable horizontally about a pivot point, and with a receiving container for receiving loosened material, which is provided on the central section on the side opposite the at least one drilling tool.

[0041] The fold-out arm elements allow for easy undercutting of the reinforcement, enabling precise placement. Furthermore, the pivoting mechanism allows for a compact drill head geometry, enabling drilling with small diameters.

[0042] A further aspect of the invention provides that each arm element has two end stops which, depending on the direction of rotation of the drill head, limit the arm element's pivoting movement between an extended drilling position and a folded transport position. It has been shown that this allows for simple and reliable folding and unfolding. The folding and unfolding movement is preferably effected by friction between the drilling tools and the surrounding rock.

[0043] A further aspect of the invention provides that at least one conveying opening is provided in the central section and / or in the base body, through which the material removed by the at least one drilling tool of the at least one arm element can be conveyed into the receiving container. It has been shown that this allows for efficient and particularly simple conveyance.

[0044] A further aspect of the invention provides that at least one receiving element for conveying the loosened material into the receiving container is provided on the central section. This allows the material loosened by the drilling tools on the central section to be easily conveyed away.

[0045] To solve the problem according to the invention, a method for drilling a substantially vertical borehole in the ground, in particular for creating a shaft, from a starting point to a target point, is further provided, comprising the following steps in any logical order: a) providing a previously described drilling device with a previously described drill head; b) preparing the starting point; c) arranging the drilling device at the starting point; d) placing and locking the drilling machine in a first support element at the starting point; e) placing at least one support element onto the first support element; f) locking the pusher unit on at least one support element; g) rotating the drill head in the drilling direction so that the at least one arm element pivots into a drilling position;h) Advance the drilling machine with rotating drill head and the intended support elements by the actuator of the thrust unit, thereby loosening the existing soil material with the drilling tools by providing a contact force through the actuator of the thrust unit; i) Convey the loosened material into the receiving container; j) Convey the loosened material in the receiving container to the starting point with the conveying device through the drilling machine; k) Release the thrust unit when the advance of the height of at least one support element has been reached; l) Place at least one further support element; m) Lock the thrust unit onto the at least one further support element; n) Repeat steps h) to m) until a target point of the bore is reached.

[0046] The automated installation of the support material reliably stabilizes the borehole, even in unstable rock formations. The extendable arm elements allow for undercutting of the support material, enabling precise placement. Furthermore, the pivoting mechanism allows for a compact drill head geometry, enabling drilling with small diameters. Near-surface installation is also possible.

[0047] A further aspect of the invention provides that at least one arm element pivots into a transport position by rotating the drill head against the direction of drilling. A further aspect of the invention provides that the drilling machine is detached from the first support element and, after pivoting the arm element into a transport position, removed from the borehole. This allows for a simple reduction in diameter, which facilitates the easy removal of the drill head.

[0048] Another aspect of the invention provides that the dissolved material is conveyed through a conveying opening. It has been shown that this allows for efficient and particularly simple conveyance.

[0049] A further aspect of the invention provides that conveying is carried out using a driver on the arm element and / or a receiving element on the central section of the drill head. This allows for the reliable conveying of the loosened material in the desired direction in a simple manner.

[0050] A further aspect of the invention provides that the dissolved material in the receiving container is picked up by a gripper as a conveying device, or can be removed by means of a screw conveyor or a suction system. This allows for the simple and reliable conveyance of the dissolved material to the surface.

[0051] Another aspect of the invention provides that conveying to the starting point is accomplished through a central tube of the drilling machine. This ensures simple conveying by the drilling machine itself. KLIC KOW & WE TZ EL

[0052] A further aspect of the invention provides that the loosened material in the receiving container is conveyed away using a gripper, a suction device, and / or a screw conveyor. This allows for simple and cost-effective removal. For short boreholes or when small quantities of water are present along with the loosened material, the gripper can be a particularly advantageous conveying method.

[0053] Another aspect of the invention provides that the conveying to the starting point is carried out through a central tube of the drilling machine.

[0054] A further aspect of the invention provides that the thrust unit has at least one holding device which is detachably connected to the extension element for applying the thrust force. This allows for a secure connection to be provided in a simple manner.

[0055] A further aspect of the invention provides that the holding device has at least one releasable holding element which is placed around a mounting element to create the releasable connection and / or is locked with at least one actuator. This allows a secure connection to be provided in a simple manner.

[0056] The invention is explained in more detail below with reference to a drawing of a preferred embodiment. The drawing shows...

[0057] Fig. 1 is a schematic side view of a drilling device according to the invention,

[0058] Fig. 2a is an enlarged detail view of Fig. 1 ,

[0059] Fig. 2b shows an alternative view to Fig. 2a.

[0060] Fig. 3a shows a spatial view of a drill head according to the invention,

[0061] Fig. 3b shows a first side view of Fig. 3a,

[0062] Fig. 3c shows a second side view of Fig. 3a,

[0063] Fig. 3d is a bottom view of Fig. 3a,

[0064] Fig. 3e is a sectional view of AA from Fig. 2b and of Fig. 3a,

[0065] Fig. 3f shows a sectional view of BB from Fig. 2b and a top view of Fig. 3a, and

[0066] Fig. 4 shows a spatial view of a holding device of a holding system of the drilling device according to the invention. KLIC KOW & WE TZ EL

[0067] Figures 1 to 4 show a drilling device 10 according to the invention with a drill head 30 according to the invention.

[0068] Figure 1 shows a drilling device 10 for creating a vertical near-surface borehole 100 in a soil 200, here designed as a vertical borehole or shaft, into which a support 110 is inserted in a controlled manner into the borehole 100 created in the soil 200.

[0069] At the starting point 101 of the borehole 100, a foundation, for example a ring foundation 105, is erected, on which a thrust unit 50 of the drilling device 10 is arranged, and on the foundation or within the ring foundation 105 at least one support element 115a, 115 and a drilling machine 20 of the drilling device 10 are arranged.

[0070] Above the starting point 101, a gantry crane 120 is arranged as a lifting device. Material can be conveyed into the borehole 100 via this lifting device. Furthermore, the lifting device can be part of the conveying system and used to remove the excavated material. Additionally, a support element 115 can be picked up at a receiving location 102 using the conveying system and placed onto an already installed support element 115.

[0071] In this embodiment, a winch 131 is provided on the gantry crane 120, which can be moved along a traverse 121 between a receiving location 102 and the starting point 101 of the bore 100.

[0072] Figure 1 shows a preferred embodiment of the drilling device 10 according to the invention. This device has the following combination of features:

[0073] • a drilling machine 20 with a rotary drive 21 for a drill head 30 and a machine frame 23, on which locking devices 22 are preferably provided (Figure 2a, Figure 2b, Figure 3f),

[0074] • a drill head 30 according to the invention with drilling tools 31 (Figures 3a to 3f),

[0075] • for a construction 110 arranged one above the other, preferably connected in a tensile-resistant manner, construction elements 115 (Figure 1),

[0076] • a push unit 50 with at least one vertically extendable actuator 51, preferably a hydraulic cylinder, for pressing the support elements 115 into the ground and preferably at least one holding system with a holding device 52, particularly preferably with a lower holding element 54 (for example as a pipe brake) and an upper holding element 53 (see also Figure 4) for holding (lower holding element KLIC KOW & WE TZ EL

[0077] 54) and vertical lowering / raising of the extension 110 (upper retaining element 53) during extension / retraction of the actuator 51 (Figure 1),

[0078] • preferably a lifting device, which is particularly preferably designed as a gantry crane 120, with which extension elements 115 are arranged on the already installed extension 110 (Figure 1),

[0079] • A conveying device, preferably a screw conveyor, a grab 130 (Figures 1 to 2b) or a hydraulic suction system for the material (soil / rock) removed by the drill head 30. In the conveying system preferably shown here using a grab 130, a winch 131 is provided on the gantry crane 120, with which the grab (130) can be lowered and raised.

[0080] Locking devices 22, preferably as a hydraulic system, are provided on the machine frame 23, with which the drilling device 10 is locked in the support 110, preferably in the first support element 115a, so that the drill head 30 protrudes downwards beyond the support 110.

[0081] The drill head 30 of the drilling device 10 is pressed against the soil / rock to be loosened at the shaft bottom / face. The pressing force is preferably applied by the actuator 51 to the support 110. The support 110 is connected to the drilling machine 20. Preferably, the connection is made via the locking mechanism. Alternatively, a support 26 can be provided on the machine frame 23, on which the support 100 rests. The pressing force can also be transmitted to the drilling machine and the drill head via this support.

[0082] The defined contact force preferably corresponds to the feed force of the push unit 50 and the weight force of the support 110 minus the friction of the support 110 on the borehole wall 109 of the (shaft) borehole 100.

[0083] Should the applied contact force, due to the weight of the support structure minus friction, exceed the permissible contact force, a counterforce can be applied to the support structure using the actuator 51, provided the support elements 115 are, for example, tensile-resistant. If this counterforce is insufficient or if the support elements 115 are not tensile-resistant, a further counterforce can be applied using a lifting device (not shown), such as a stranded lifting / lowering device (not shown), which is connected to the support structure.

[0084] Preferably, the strand lifting / lowering device consists of at least two strand lifting / lowering units, each comprising an actuator (not shown), for example, a hydraulic cylinder, with which a strand detachably connected to the actuator can be continuously lowered until a defined distance, for example, the stroke of a hydraulic cylinder, has been covered. Conversely, the strand lifting / lowering element can also be raised or temporarily held in a position. Subsequently, the strand is locked, the actuator is detached from the strand, retracted, and reconnected to the strand. In this way, the support material in the form of individual support elements 115 can be successively installed as the drill head progresses, or the installation can be slowed down or stopped.The strand lifting / lowering units each have at least one drum (not shown) on which the strands can be wound up and unwound.

[0085] The retaining elements 53, 54 are movably connected to the actuator 51 as preferably shown in Figure 1. They preferably grip the removal elements 115 from the outside and hold them. Alternating opposite release and gripping of the at least two retaining elements 53, 54 enables the removal elements 115 to be pressed in, locked / held, and repositioned.

[0086] When the actuator 51 in Figure 1 is extended, the upper retaining element 53 is open and the lower retaining element 54 is closed. This causes the retaining element 53 to move upwards as the actuator 51 extends, in order to grasp the next support element 115 after it has been placed and to begin the next drilling cycle. The lower retaining element 54 is closed, grips the anchor element 115, and thus locks the support element 110 already inserted into the borehole 100. This prevents it from being forced back out of the borehole 110, for example. If there is a tensile-resistant connection between the individual support elements 115, the support element 110 also cannot slip downwards.

[0087] During the insertion of the actuator 51 as drilling progresses, the retaining element 54 is open to allow movement of the support 110. The retaining element 53 is closed around the uppermost support element 115 to be inserted, so that the support can be pressed into the ground.

[0088] Figure 4 shows the structure of a preferred holding system for round support elements. These are constructed in a belt-like manner (first retaining arch 56 and second retaining arch 57). Actuators are provided for tensioning the belts / retaining arches 56, 57 against each other, preferably hydraulic tensioning cylinders 55. When these are retracted, the belt-like holding element 53, 54 is pressed against a support element 115, creating a force-fit connection.

[0089] When the actuator / tensioning cylinder 55 is extended, the retaining element 53, 54 detaches from the removal element of a 15.

[0090] Figure 4 shows a preferred embodiment of the retaining elements 53, 54. Here, the retaining elements 53, 54 are preferably constructed in two parts. They each have a first retaining arch 56 and a second retaining arch 57, which are movably arranged relative to each other. Clamping cylinders 55 are provided between them. Extending the clamping cylinders 55 separates the retaining arches. Retracting the clamping cylinders 55 draws the retaining arches together so that they close around a support element 115. Additionally, the retaining arches can have 58 grooves 59 on their inner surface to improve the connection between the retaining arches 56, 57 or retaining elements 53, 54 and the support elements 115.

[0091] The drill head according to the invention is shown in a preferred embodiment in Figures 3a to 3f. The drill head 30 has a base body 32 which is designed to be connected to the drilling machine 20. A central section 33 is provided in the middle of the base body 32.

[0092] Drilling tools 31 and receiving elements 40 are provided on the underside of the central section 33. The underside 43 of the central section 33 represents a forward drilling plane, which provides a short borehole section that improves the centering of the drilling machine 20 during drilling and offers a cost-effective way to provide a simple collection plane for the loosened material for subsequent removal from the bore 100. Preferably, the underside 43 of the central element 33 is planar. A conical shape is also possible.

[0093] The drilling tools 31 serve to loosen the material. The receiving elements 40 serve to receive the material loosened by the drilling tools 31. Preferably, the receiving elements are arranged directly behind the drilling tools in the drilling direction. They convey the loosened material to the discharge system.

[0094] Furthermore, the drill head 30 has a second drilling plane provided by arm elements 34 that extend radially outwards during drilling. Drilling tools 31 and drivers 41 are provided on the underside 42 of the arm elements 34. The arm elements 34 are connected to the base body 32 at a pivot point 35, allowing the arm elements 34 to pivot between a drilling position and a transport position.

[0095] Preferably, the arm element 34 has a triangular shape, with the underside 42 designed to dip in a hypotenuse-like / diagonal manner, so that the underside extends radially outwards and diagonally towards the starting point 101, resulting in a borehole that dips inwards in the second plane. A concave or convex shape would also be possible.

[0096] The loosened material on this surface slides downwards towards the central area. To assist this movement, a driver 41 is arranged on the underside 42 of the arm element 34, which transports material lying in front of the drilling tools 41 on the drill base towards the central area, so that loosened material is not passed over again by the drilling tools.

[0097] To ensure a defined arrangement of the arm elements 34 in the drilling and transport positions, end stops 37 and 38 are provided on the base body 32. The end stop 37 limits the arm element 34 in the drilling position, and the end stop 38 limits it in the transport position. The movement of the arm elements 34 between the transport and drilling positions is achieved by rotating the drill head 30. Depending on the direction of rotation, the friction between the drilling tools 31 and the rock formation causes the pivoting movement. In the illustrated embodiment, a clockwise rotation in the direction of arrow A moves the arm elements 34 against the end stop 37 into the drilling position. If the drill head is rotated in the opposite direction, contrary to the direction of arrow A, the arm elements 34 move in the opposite direction against the end stop 38 into the transport position.

[0098] By rotating the drill head 30 by the drive 21 of the drilling machine 20 and applying the feed by actuating the actuator 51 on the support 110, the drilling tools 31 are pressed against the material and moved over it, so that the drilling tools 31 loosen the material.

[0099] The material is loosened by the drilling tools 31 on the arm element 34 as well as by the drilling tools 31 on the central section 33. The drivers 41 move the loosened material downwards towards the center of the bore.

[0100] The central section 33 has a receiving container 36 on its rear side opposite the drilling tools. For this purpose, the central section 33 is preferably designed in a cup-like shape. [KLIC KOW & WE TZ EL]

[0101] If a grab 130 is to be used as the conveying device, the bottom of the receiving container 36 can be profiled (Figure 2b) so that the buckets 132 of the grab 130 can more easily pick up the loosened material along the profile 44. Furthermore, this ensures that the loosened material can be completely removed from the receiving container 36 by the grab buckets 132.

[0102] If a conveying section arranged in a pipe or a suction line is to be provided as a conveying means, other profiles can be provided to support the conveyance of the dissolved material from the receiving container 36.

[0103] In the central section 33, at least one conveying opening 39 is provided. This enables the conveyance of the dissolved material from the areas of the drilling tools 31 into the receiving container 36 in order to supply the dissolved material for discharge.

[0104] The material transported by the receiving device 41 is preferably conveyed downwards along the incending shaft floor in such a way that it reaches the conveying opening 39 at the end of the receiving device 41.

[0105] Furthermore, the receiving elements 40 preferentially receive the dissolved material and move it upwards towards the conveying opening 39, so that this material can enter the receiving container 36.

[0106] Preferably, the drilling machine 20 has a central tube 24 (see Figures 2a and 2b). The central tube 24 is preferably designed such that the drill head 30 can rotate at least partially around the central tube.

[0107] The conveying device is preferably guided through this central tube 24. This can be, for example, a pipeline, a suction system, a screw conveyor arranged in a pipeline, or a gripper 130.

[0108] Furthermore, it is advantageous that a guide funnel 25 is provided on the central tube 24 for inserting the gripper 130 into the central tube 24. This ensures in a particularly simple way that the gripper 130 enters the central tube 24 cleanly and thus into the receiving container 36.

Claims

KLIC KOW & WETZ EL PARTNERSHIP COMPANY MBB PATENT ATTORNEYS EUROPEAN PATENT AND TRADEMARK ATTORNEYS JESSENSTRASSE 4 22767 HAMBURG GERMANY Applicant: Herrenknecht AG www.klickow-wetzel.de Schlehenweg 2 Telephone: +49 (0)40 380 8715-0 77963 Schwanau Fax: +49 (0)40 380 8715-25 Germany mail@klickow-wetzel.de HKN-235-PCT November 7, 2025 / pwi.pwi Patent claims 1 Device for drilling a substantially vertical borehole (100) in the ground (200), in particular for creating a shaft, having a starting point to a target point: • a plurality of support elements (115a, 115) for creating a support (110) of the borehole (100); • a drilling machine (20) for creating the borehole (100) in the ground (200), which is arranged in at least one support element (115), • a drill head (30) with a base body (32) for connection to a drilling machine (20), o with a central section (33) as a drilling section with at least one drilling tool (31) and / or as a guide section, which is connected to the base body (32), o with at least one arm element (34) with at least one drilling tool (31) and / or a driver (41) for conveying loosened material, which is arranged on the base body (32) so as to be pivotable horizontally about a pivot point (35), o with a receiving container (36) for receiving loosened material, which is provided on the central section (33) on the side opposite the at least one drilling tool (31), • a thrust unit (50) provided at the starting point (101) with at least one actuator (51) for pressing the support elements (115) into the ground and / or for generating a pressing force acting on the drill head (30) during drilling; • at least one conveying device that conveys the material removed by the drill head (30) from the receiving container (36) of the drill head (30) behind the drilling tools (31) through the drilling machine (20). KLIC KOW & WE TZ EL 2. Device according to claim 1, characterized in that two end stops (37, 38) are provided for each arm element (34) of the drill head (30), which, depending on the direction of rotation of the drill head (30), limit the arm element (34) in the pivoting movement between an extended drilling position and a folded-in transport position.

3. Device according to claim 1 or 2, characterized in that at least one conveying opening (39) is provided in the central section (33) and / or in the base body (32) of the drill head (30), through which the material removed by the at least one drill tool (31) of the at least one arm element (34) can be conveyed into the receiving container (36).

4. Device according to one of claims 1 to 3, characterized in that at least one receiving element (40) for conveying the dissolved material into the receiving container (36) is provided on the central section (33) of the drill head (30).

5. Device according to one of claims 1 to 4, characterized in that the at least one actuator (51) of the thrust unit (50) is a hydraulic cylinder or a rack and pinion drive.

6. Device according to one of claims 1 to 5, characterized in that at least two support elements (115) are connected to each other in a tensile-resistant manner and / or that at least one sealing element (117) is provided between the support elements (115).

7. Device according to one of claims 1 to 6, characterized in that a lifting system for braking or lifting the removal (110), preferably a stranded lifting system, is provided for the removal.

8. Device according to one of claims 1 to 7, characterized in that the push unit (50) has at least one holding device (52) which can be detachably connected to a mounting element (115).

9. Device according to claim 8, characterized in that the holding device (52) has at least one releasable holding element (53, 54).

10. Device according to claim 8 or 9, characterized in that the at least one releasable retaining element (53, 54) can be placed at least one around a mounting element (115) and / or can be locked with at least one actuator (55). KLIC KOW & WE TZ EL 11. Device according to claim 10, characterized in that the at least one actuator (55) of the holding element (53, 54) is a clamping cylinder (55).

12. Device according to one of claims 1 to 11, characterized in that the The drilling machine (20) has a drive (21) for rotating the drill head (30).

13. Device according to one of claims 1 to 12, characterized in that the Drilling machine (20) has a machine frame (23) on which a locking system (22) for locking the drilling machine (20) in at least one expansion segment (115a, 115) is provided.

14. Device according to one of claims 1 to 13, characterized in that the drilling machine (20) has a central tube (24), preferably in the middle, through which a conveying device for conveying material loosened by the drill head (30) passes through the drilling machine (20).

15. Device according to claim 14, characterized in that the central tube (24) has an insertion funnel (25).

16. Device according to claim 14 or 15, characterized in that the central tube (24) is connected to the receiving container (36).

17. Drill head for drilling a substantially vertical borehole (100) in the ground (200), in particular for creating a shaft, • with a base body (32) for connecting to a drill (20), • with a central section (33) as a drilling section with at least one drilling tool (31) and / or as a guide section connected to the base body (32), • with at least one arm element (34) with at least one drilling tool (31) and / or a driver (41) for conveying loosened material, which is arranged on the base body (32) so as to be pivotable horizontally about a pivot point (35), • with a receiving container (36) for receiving dissolved material, which is provided on the central section (33) on the side opposite the at least one drilling tool (31).

18. Drill head according to claim 17, characterized in that two end stops (37, 38) are provided per arm element (34) which, depending on the direction of rotation of the drill head (30), KLIC KOW & WE TZ EL Limit the arm element (34) between an extended drilling position and a folded-in transport position during the pivoting movement.

19. Drill head according to claim 17 or 18, characterized in that at least one conveying opening (39) is provided in the central section (33) and / or in the base body (32) through which the material removed by the at least one drilling tool (31) of the at least one arm element (34) can be conveyed into the receiving container (36).

20. Drill head according to one of claims 17 to 19, characterized in that at least one receiving element (40) for conveying the dissolved material into the receiving container (36) is provided on the central section (34).

21. Method for drilling a substantially vertical borehole (100) in the ground (200), in particular for creating a shaft, from a starting point to a target point, comprising the following steps in any logical order: a) providing a drilling device (10) according to any one of claims 1 to 16 with a drill head (30) according to any one of claims 17 to 20; b) preparing the starting point (101); c) arranging the drilling device (10) at the starting point (101); d) placing and locking the drilling machine (20) in a first support element (115a) at the starting point (101); e) placing at least one support element (115) onto the first support element (115a); f) connecting the pusher unit (50) with at least one support element (115); g) rotating the drill head (30) in the drilling direction so that the at least one arm element (34) pivots into a drilling position;h) Advancement of the drilling machine (20) with rotating drill head (30) and the provided support elements (115) by the actuator (51) of the push unit (50), thereby loosening the existing soil material (200) with the drilling tools (31) by providing a contact force through the actuator of the push unit (50); i) Conveying the loosened material into the receiving container (36); j) Conveying the loosened material in the receiving container (36) to the starting point (101) by the conveying device through the drilling machine (20); k) Detaching the push unit (50) from the support element (115) when advancement of the height of at least one support element (115) has been achieved; l) Placing at least one further support element (115) on top; m) Connecting the push unit (50) with the at least one further support element (115); KLIC KOW & WE TZ EL n) Repeat steps h) to m) until a target point of the bore (100) is reached.

22. Method according to claim 21, characterized in that at least one arm element (34) pivots into a transport position by rotating the drill head (30) against the direction of drilling.

23. Method according to claim 21 or 22, characterized in that the drilling machine (20) is detached from the first support element (115) and is removed from the borehole (100) after pivoting the arm element (34) into a transport position.

24. Method according to one of claims 21 to 23, characterized in that the conveying of the dissolved material takes place through a conveying opening (39).

25. Method according to claim 24, characterized in that the conveying is carried out with a driver (41) on the arm element (34) and / or a receiving element (40) on the central section (33) of the drill head (30).

26. Method according to one of claims 21 to 25, characterized in that the dissolved material in the receiving container (36) is conveyed away by means of a gripper (130), a suction device and / or a screw conveyor.

27. Method according to one of claims 21 to 26, characterized in that the conveying to the starting point is carried out through a central tube (24) of the drilling machine (20).

28. Method according to one of claims 21 to 27, characterized in that the thrust unit has at least one holding device (52) which is detachably connected to the extension element (115) for the purpose of introducing the thrust force.

29. Method according to claim 28, characterized in that the holding device (52) has at least one releasable holding element (53, 54) which is placed around a removal element (115) to create the releasable connection and / or is locked with at least one actuator (55).

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