Cable reel for inserting a data cable in a drill string, in particular a horizontal drilling rig

Abstract

Cable reel for inserting a data transmission cable (31) into a drill string (6) comprising: - a power rotary head (1), - a drill string (6) rotatably coupled thereto, consisting of a plurality of rotatably coupled drill rod sections, - a drum carrier (12) rotatably coupled to the power rotary head (1), - a cable drum (18) rotatably mounted on the drum carrier (12), - a first rotary feedthrough (3, 10) on the drill string (6) consisting of a plurality of rotatably coupled drill rod sections for routing a connection of a data transmission cable (31) to the outside, - a second rotary feedthrough (28, 29) for the data transmission cable (31) from the cable drum (19) to the drum carrier (12), characterized by: - ​​an outlet flange pipe (2) rotatably coupled to the power rotary head (1), - a connection with the outlet flange pipe (2) rotatingly coupled drum carrier (12), - at least one cable drum (18) mounted to rotate on the drum carrier (12),18a) and - a cable gland (5a) arranged on the outlet flange pipe (2) for the cable string of the data transmission cable (31) from the at least one cable drum (18, 18a) into the drill string (6) consisting of a plurality of rotatably coupled rod sections.

Description

[0001] The invention relates to a cable reel for inserting a data transmission cable into a drill string of a drilling rig, in particular a horizontal drilling rig, comprising a power rotary head, a tubular drill string rotatably coupled thereto, consisting of a plurality of rotatably coupled tubular drill string sections, a drum carrier rotatably coupled to the power rotary head, a cable drum rotatably mounted on the drum carrier, a rotary feedthrough for the data transmission cable from the cable drum to the drum carrier, and a rotary feedthrough on the drill string for routing a connection of a data transmission cable to the outside.

[0002] Such a cable reel on a horizontal drilling rig is disclosed in DE 202 02 395 U1 of the applicant.

[0003] Specifically, it states that horizontal drilling rigs are capable of creating directed boreholes in the soil, rock or stone and have a rotary power head that can be moved on a drill mast or frame, which is connected to a drill string consisting of rod sections that are coupled to each other in a rotating manner and drives this drill string into the ground.

[0004] These directional boreholes are used to lay product pipes, such as communication lines, gas pipelines, oil pipelines, water pipelines, or the like, in inaccessible terrain, particularly beneath railway lines, highways, rivers, or similar structures. Boreholes, which are essentially horizontal, can be drilled over long distances. This simplifies the laying of product pipes and significantly reduces installation costs.

[0005] Using a horizontal drilling rig, a pilot bore is first created by driving a drill string into the ground with the help of a rotary head. The string encounters any obstructions and emerges at a specific point. A reaming head is attached to the end of the drill string that emerges from the ground. This reaming head is pulled into the pilot bore along with the drill string, widening the bore. Simultaneously or subsequently, a product pipe with a diameter essentially corresponding to that of the reaming head can be pulled into the bore.

[0006] For position determination during the process, a constant exchange of data is required between a drill transmitter in the area of ​​a drill head at the front end of the drill string with integrated locating device in the ground and a carrier device on the earth's surface.

[0007] From DE 202 02 395 U1, it is known to route a data transmission cable through the drill string to the drill transmitter in the area of ​​the drill head for data exchange. For this purpose, the drill head is connected to the data transmission cable routed through the drill string and to the carrier device on the surface. In this way, it is possible to ensure contact between the drill head and the carrier device, regardless of the distance and depth of the borehole. To prevent the data transmission cable from twisting during the drilling process, it is known from DE 202 02 395 U1 to mount a drum on which the data transmission cable is wound so as to be rotatable in a drum carrier, the drum carrier being in turn rotatably connected to the drill string. This causes the drill string and the data transmission cable to rotate together, thus reducing the risk of tangling and cable breakage.

[0008] The drawing appended to DE 202 02 395 U1 shows only a section of a horizontal drilling rig. This section comprises a frame on which a rotary power head, which drives a drill string, is movably mounted. A stationary flushing adapter for drilling fluid introduced into the drill string is also attached to the frame. This adapter is connected via a rotary union to a connection on the rotary power head and via a similar rotary union to another pipe connection that rotates in a bearing. In the illustrated embodiment, an energy and data transmission cable in the form of an electrical cable runs from the drill string through the rotary power head, the flushing adapter, and the pipe connection to a rotatable drum carrier coupled to the drill string. The drum carrier is designed as a closed frame in which an inner cable drum is mounted with an axis of rotation perpendicular to the axis of rotation of the drum carrier.A supply of electrical cable is wound onto the inner cable drum. The rotation of the drum support in the same direction as the drill string is achieved by the aforementioned connection.

[0009] A hydraulic motor acts on the inner cable drum, either braking or driving it. An electrical connection runs from the inner cable drum, via a first rotary union equipped with slip rings, to a second rotary union. The hydraulic lines for the hydraulic motor and the electrical cable from the first rotary union pass through this second union. The hydraulic lines for the hydraulic motor run from the second rotary union to a hydraulic control unit, which adjusts the braking or driving torque of the hydraulic motor. The electrical connection through the second rotary union transmits the signals carried by the electrical cable (not shown) to a carrier unit. This unit receives and processes the signals to send them to a directional control unit located in the drill head.Furthermore, the electrical cable serves to supply the drill transmitter in the area of ​​the drill head with the electrical energy required for its operation.

[0010] To seal the flushing suspension, which is fed under pressure to the flushing adapter, a conical valve seat is arranged in a flange of the pipe connection. This seat interacts with an elastically deformable valve ball. This valve ball has a bore through which the electrical cable runs from the cable drum to the drill string. When the flushing adapter is pressurized, the valve ball is pressed onto the conical valve seat, deforming and sealing the bore around the electrical cable.

[0011] Since there is no relative movement of the electrical cable with respect to the drill string during the drilling process and the application of drilling fluid, the valve ball provides a static seal, preventing any sliding of the electrical cable against the rubber ball. An electric motor can be used instead of a hydraulic motor, suitable for both braking and driving functions. In this case, a corresponding electrical control unit is required instead of the hydraulic control system.

[0012] The described horizontal drilling rig has proven itself very well in operation, especially on large horizontal drilling rigs, in conjunction with the cable reel; however, the cable reel requires additional space for the cable drum and for a necessary extension of the frame to support the rotary feedthrough arranged opposite to the power rotary head on the cable drum.

[0013] In addition to the above analysis of DE 202 02 395 U1, reference is also made to the following publications, which form the technological background to the claimed invention: 1. DE 297 24 364 U1: This document describes a device for pulling pipes or cables into a pilot bore, comprising a drive, a drill string coupled to the drive in a rotating and / or pulling manner, a coupling between the drill string or the reaming head and the pipe or cable that transmits tensile forces, and a measurement transmission system. A cable is arranged outside the drill string and pulled along with it, and is led directly to a reel from which the cable unwinds during pulling. Another cable section leads from the reel to a control box of the drive. The description does not mention that a slip ring assembly must be present in the axis of the reel to establish a data connection to the control box via the additional cable section. 2. DE 198 19 626 A1: This document describes a system for transmitting data or...Electrical current for a steerable horizontal drilling rig for laying and destructively replacing utility lines, suitable for both percussive and rotary drilling operation, preferably consisting of three elements (machine adapter, rod adapter, transmitter adapter) for connecting the cable line, and allowing for reliable and trouble-free use of a cable connection between a consumer or sensor and a power source or data processing unit. This document mentions the problem that the drilling rig must drive the rod sections into the ground element by element, which necessitates the step-by-step connection of the pipe elements and also the cable sections.The solution consists of individual drill rod sections comprising drive adapters, rod adapters, and a consumer adapter housed in a drilling rig (not shown), along with corresponding pre-assembled internal cable segments. These segments are equipped with coupling contacts that automatically establish an electrical connection between the internal cable segments when the drill rod sections and the housing are joined. In the drive adapter, signal transmission from the rotating drill rod to a stationary current collector occurs via a slip ring, while signal transmission in the rod adapter and consumer adapter occurs via axially displaceable contacts. It is not mentioned that the cable is pulled from a reel. 3.DE 10 2010 019 514 A1: This document describes an earth drilling device comprising a drill string, a source of drilling fluid, and a voltage source, wherein the drill string has a hollow casing designed for the flow of drilling fluid and a conductor located within the casing, and wherein the voltage source is connected to the conductor and the casing. The voltage source is regulated in such a way as to prevent the electrical conductor from acting as an anode in the event that an electrically conductive connection exists between the casing and the conductor due to the drilling fluid. This publication addresses the problem that horizontal boreholes often have lengths of several hundred meters, necessitating the use of drill strings consisting of individual, rotatably coupled sections. As the borehole progresses, the individual drill string sections are successively attached to the existing, completed section. Section 3 already describes how pre-assembled electrical conductor segments, arranged within the drill string sections, can be automatically coupled when the sections are joined. However, a problem arises here: at leaking contact points of the electrical conductor, an anodic reaction occurs, characterized by the deposition of an insulating oxide layer.To avoid this, an electrical potential is to be generated between the conductor and the drill string sheath. This potential is designed so that, in the event of an electrical connection between the drill string sheath and the conductor via the drilling fluid, the conductor does not act as an anode, and therefore no anodic reaction occurs on the conductor, thus preventing oxidation and interruption of the conductivity of the uninsulated sections of the conductor. A cable reel is not mentioned in this document, nor is it stated whether the electrical conductor rotates with the drill string or whether a rotary feedthrough is provided at the drill head or in the area of ​​the power source.

[0014] Against this background, the invention was based on the objective of presenting a drilling rig, in particular a horizontal drilling rig with a cable reel for inserting a data transmission cable into a drill string consisting of a plurality of rotatably coupled, tubular drill sections, which requires little space and construction effort, and with which the data transmission cable can be drawn into the drill string in a taut manner without knotting and without risk of tearing, and can be easily pulled out of it.

[0015] This problem is solved by a drilling rig, in particular a horizontal drilling rig with a cable reel for inserting a data transmission cable into a drill string, which has the features of claim 1. Advantageous embodiments are defined in dependent claims 2 to 10.

[0016] Accordingly, the invention relates to a cable reel for inserting a data transmission cable into a drill string consisting of a plurality of rotatably coupled, tubular drill sections of a drilling rig, in particular a horizontal drilling rig, comprising a power rotary head, a tubular drill string rotatably coupled thereto consisting of a plurality of rotatably coupled, tubular drill sections, a drum carrier rotatably coupled to the power rotary head, a cable drum rotatably mounted on the drum carrier, a rotary feedthrough for the data transmission cable from the cable drum to the drum carrier, and a rotary feedthrough on the drill string consisting of a plurality of rotatably coupled, tubular drill sections for routing a connection of the data transmission cable to the outside.

[0017] The solution to the given problem is characterized by a rotating outlet flange pipe coupled to the power rotary head, a rotating drum support coupled to the rotating outlet flange pipe, at least one cable drum rotatably mounted on the drum support and a cable gland arranged on the outlet flange pipe for the data transmission cable from the at least one cable drum into the drill string.

[0018] The drum support is thus coupled to the outlet flange pipe in a rotating manner downstream of the rotary power head and requires no additional space upstream of the rotary power head. The construction effort is also reduced compared to the aforementioned state of the art.

[0019] Since the drum support rotates with the cable drum, the outlet flange pipe and thus with the drill string, the risk of knotting and breakage is eliminated without the need for a motor that brakes or drives the cable drum.

[0020] The outlet flange pipe can advantageously be designed in multiple parts, in that a rotatably coupled, tubular intermediate piece can optionally be arranged on the outlet flange pipe and / or a threaded transition piece can be arranged between the outlet flange pipe and / or the intermediate piece and / or the drill string made of a plurality of rotatably coupled, tubular drill string sections, wherein the cable entry for the data transmission cable can be arranged in the outlet flange pipe as required and as space permits.

[0021] In order to adapt the drill string to the respective required length of a directed borehole in soil, rock, or stone, it may be provided that the drill string comprises at least the outlet pipe flange with the cable feedthrough and tubular rod sections that can be coupled element by element with the outlet flange pipe or an intermediate piece, through which the data transmission cable is guided to the drill head (not shown) at the front end of the drill string, wherein the cable feedthrough may have a sealing arrangement for the data transmission cable running through the cable feedthrough that acts as a seal against the interior of the tubular drill string in order to prevent the escape of the flushing suspension introduced into the drill string via a flushing adapter.

[0022] On the drum support, at least one support shaft extending approximately perpendicular to the axis of the outlet flange pipe is arranged for the rotatable mounting of the cable drum, wherein the rotary feedthrough between the rotatable cable drum consists of a first slip ring on the cable drum and a first brush assembly fixed to rotation adjacent to the at least one support shaft and insulated on the drum support, the rotary feedthrough on the drill string consists of a second slip ring attached to the outlet pipe flange and a second brush assembly cooperating with it, which is attached to a rotary head insulated, from where an electrical connection directs the signals carried by the data transmission cable to a carrier device that receives and processes the signals in order to supply a direction control unit arranged in the drill head with corresponding signals.

[0023] Furthermore, at least one angled bracket for a pressure fork is arranged on the drum support, and a retaining plate for the at least one cable drum is non-rotatably attached to the free end of the at least one support shaft for the cable drum on the drum support. This retaining plate has a receptacle at at least one free end, aligned with a complementary receptacle on the angled bracket, for the opposite free ends of a pivot pin on a spring- or weight-loaded pressure fork for a cable reel on the cable drum. To control the friction on the cable reel on the cable drum, the pressure fork can have a pressure roller that rests on the cable reel and is either rotatable or non-rotatable.

[0024] The rotary power head has a support for an insulating mount of the second grinding brush arrangement.

[0025] The drum support can be clamped, welded or screwed to the outlet flange pipe, the intermediate piece or the protective piece.

[0026] To increase the supply of data transmission cable to be inserted into the drill string, the drum carrier can comprise more than one suitably oriented support shaft, preferably two coaxial, oppositely oriented support shafts for one cable drum each.

[0027] To further illustrate the invention, a drawing of an exemplary embodiment is included with the description. This drawing shows: Fig. 1 is an isometric view of a power rotary head of a horizontal drilling rig with a cable reel attached to it, and Fig. 2 is an isometric, expanded view of the power rotary head of the horizontal drilling rig with a representation of the individual parts of the cable reel.

[0028] In the Fig. 1 Figure 1 shows an isometric view of a rotary power head 1 with several rotary drive motors 1a arranged on it. Such a rotary power head 1 is typically mounted on a carriage of a horizontal drilling rig so that it can be moved by means of a linear drive (not shown). This arrangement is known in horizontal drilling rigs, for example from the aforementioned German Patent Application DE 202 02 395 U1, and is therefore not shown in detail. The rotary drive motors 1a and the linear drive on the rotary power head 1 serve to apply torque, compressive forces, tensile forces, and optionally impact forces, to a drill string 6 consisting of a plurality of rotatably coupled, tubular drill sections and, if applicable, a threaded adapter 11.For this purpose, a drill head (not shown) is arranged at the front end of the drill string 6, consisting of a plurality of rotatably coupled, tubular drill sections and the threaded adapter 11. This drill head enables the drilling of directional boreholes into soil, rock, or stone. The threaded adapter 11 is provided with different conical external threads 11a, 11b to allow it to be screwed to the outlet flange pipe 2 and / or the tubular intermediate section 4 and / or the drill string 6, which may have different conical internal threads.

[0029] A rotary head 1 is coupled to an outlet flange pipe 2 in a rotationally fixed and axially immovable manner. To drill a borehole into the ground, rock, or stone, the outlet flange pipe 2 and a drill string 6 rotatably coupled to it, consisting of a plurality of rotatably coupled drill rod sections and the threaded adapter 11, are set in rotation by means of the rotary drive motors 1a. Simultaneously, compressive or tensile forces are applied to the drill head by means of the linear drive. The drill head can optionally be designed to impact in a known manner in order to break up rock or stone.

[0030] For position determination during the drilling process, continuous data exchange is required between a drill transmitter (not shown) located in the area of ​​the drill head at the front end of the drill string 6, consisting of a plurality of rotatingly coupled drill sections, and the threaded adapter 11 with an integrated (not shown) locating device in the borehole, and a carrier device 35 at the surface. For this purpose, a data transmission cable 31 is routed through a cable gland 5a into the drill string 6 (consisting of a plurality of rotatingly coupled drill sections) and the threaded adapter 11 to the drill transmitter in the area of ​​the drill head and connected to the carrier device 35 at the surface via a cable connection 36.

[0031] To prevent the data cable 31 from twisting during the drilling process, a drum support 12 is fixedly mounted to the outlet flange pipe 2. The fixed connection between the outlet flange pipe 2 and the drum support 12 can be force-fit, for example by clamping, form-fit by screwing, or material-fit by welding.

[0032] From the Fig. 1 and 2It is evident that the drum support 12 is designed to accommodate two cable drums 18, 18a. For this purpose, the drum support 12 has a first support shaft 13 for the first cable drum 18 and a second support shaft 3a for the second cable drum 18a. The support shafts 13, 13a run coaxially opposite to each other and orthogonally to an axis 8 of the outlet flange pipe 2 and the drill string 6. More than two support shafts 13, 13a can also be arranged on the drum support 12 in a suitable manner to accommodate more than two cable drums 18, 18a on the cable support 12 if a larger supply of the data transmission cable 31 is required.

[0033] A first rotary feedthrough 3,10 for routing a connection of a cable string of the data transmission cable 30 to the outside to the carrier device 35, consisting of a slip ring 3 on the outlet flange tube 2 and a first friction brush arrangement 10 cooperating therewith, which is insulated on a carrier 9 arranged on the power rotary head 1, ensures data transmission through a cable connection 36 from the drum carrier 12 to the outside to the carrier device 35.

[0034] Each cable drum 18, 18a has a first bearing flange 19 and a second bearing flange 19a for mounting on the respective first or second support shaft 13, 13a, which are provided with ball bearing receptacles 20 for a pair of ball bearings 21. A first slip ring brush unit 28 and a second slip ring brush unit 29 are arranged in an insulating manner on the opposing bearing flanges 19, 19a on the cable drums 18, 18a, from which cable connections 37, 38 lead to the first brush assembly 10 on the carrier 9 and from there via cable connection 36 to the carrier device 35, serving for data transmission for the cable strand of the data transmission cable 31 from the cable drums 19, 19a to the carrier device 35.

[0035] At each end of a support span 13, 13a, a square 14 is provided, which serves to receive a square opening 23 in a retaining plate 22 for the first cable drum 18 and a retaining plate 22a for the second cable drum 18a in a rotationally fixed manner. A hexagonal screw 25, which can be screwed into threaded bores 15 in the support shafts 13, 13a, serves to fasten the retaining plates 22, 22a to the first support shaft 13 and the second support shaft 13a in a rotationally fixed manner. A locking latch 27 arranged on the retaining plates 22, 22a serves to position the bearing flanges 19, 19a in a rotationally fixed manner before the hexagonal screw 25 is screwed in.

[0036] On the drum carrier 12, a first angled bracket 16 and, diametrically opposite, a second angled bracket 16a are arranged as supports for pressure forks 32, 32a, which are spring- or weight-loaded by means of a freely or braked rotatable pressure roller 34 and rest on a cable reel 30, 30a of the data transmission cable 31. The retaining plates 22, 22a each have a receptacle 24, 24a at at least one end, aligned with complementary receptacles 17, 17a, 26, 26a ( Fig. 2 ) on the angled bracket 16, 16a, for the opposite, free ends of a swivel pin 33, 33a on a spring- or weight-loaded first pressure fork 32 or a second pressure fork 32a for a cable coil 30 of the data transmission cable 31 on the at least one cable drum 18, 18a.

[0037] The outlet flange pipe 2 is designed in multiple parts and comprises a rotatably coupled, tubular intermediate piece 5, wherein the cable entry 5a for the cable string of the data transmission cable 31 can be arranged in the outlet flange pipe 2 or in the tubular protective piece 5, through which the cable string of the data transmission cable 31 is guided to the drill head at the front end of the drill string 6 consisting of a plurality of rotatably coupled rod sections.

[0038] The tubular outlet flange pipe 2, the tubular intermediate piece 5, and the tubular drill string sections of the drill string 6, which consists of a multitude of rotatably coupled drill string sections, can be quickly and easily coupled together by means of the conical external threads 11a, 11b and complementary internal threads 5c arranged at their ends.

[0039] The cable passage 5a comprises a sealing arrangement 5b that acts as a seal against the interior of the drill string 6, which consists of a multitude of rotatingly coupled rod sections.

[0040] To insert the drill string 6, consisting of numerous drill sections, into the ground, the drill string 6, which is screwed to the outlet flange pipe 2, is rotated by the rotary drive motors 1a on the rotary head 1. Simultaneously, a linear drive (not shown), supported on a carriage, acts on the rotary head 1. To remove the drill cuttings from the borehole, a pressurized flushing fluid is introduced into the drill string 6 through a stationary flushing adapter (not shown) and exits at the front end of the drill string 6 through the drill head located there. The drilling cuttings are carried back through the borehole along the inserted drill string 6 by the flushing fluid to the surface and disposed of there in a suitable manner.

[0041] The data transmission cable 31 is inserted from the cable reel 30 on the cable drum 19 or 19a through the cable gland 5a into the drill string 6, is pulled along with the drilling progress, and is unwound from the cable drum 19 or 19a. A suitable sealing assembly 5b is inserted into the cable gland 5a, which prevents the pressurized drilling fluid from escaping into the borehole.As soon as a drill string section on the drill string 6 is inserted into the borehole, the drilling process and the supply of drilling fluid to the drill string 6 are interrupted, the drill string section inserted into the borehole is unscrewed from the outlet flange pipe 2, the data cable 31 is cut, the power rotary head 1 is retracted by the length of one drill string section, and another drill string section is screwed to the outlet flange pipe 2 and the drill string 6, after the data transmission cable 31 has been pulled through the cable gland 5a into the new drill string section and connected to the end of the data transmission cable 31 already in the borehole by means of a suitable coupling 7.

[0042] The drilling process is then continued in the manner described until another drill string section needs to be screwed onto the drill string 6 inserted into the borehole, and this continues until the drill string 6 emerges from the ground at the target point. A reaming process and the insertion of a product pipe can then follow in a known manner. Reference sign

[0043] 1 Power rotary head 1a Rotary drive motors 2 Outlet flange tube 3 Slip ring on outlet flange tube 2 5 Tubular intermediate piece 5a Cable feedthrough 5b Sealing assembly 5c Conical internal thread on tubular intermediate piece 5 6 Drill string consisting of a plurality of rotatingly coupled, tubular rod sections 7 Coupling 8 Axis of outlet flange tube 2 and drill string 6 9 Support for a first grinding brush assembly 10 10 First grinding brush assembly on support 9 11 Threaded transition piece 11a, 11b Different, conical external threads on the threaded transition piece 12 Drum support 13 First support shaft 13a Second support shaft 14 Square 15 Threaded bore 16 First angled bracket 16a Second angled bracket 17 First mount for a first swivel pin 33 17a Second mount for a second swivel pin 33a 18 First cable drum 18a Second cable drum 19 First bearing flange on the first cable drum 18 19a Second bearing flange on the first cable drum 18 20 Ball bearing mount21 Ball bearing pair 22 Retaining plate for the first cable drum 18 22a Retaining plate for the second cable drum 18a 23 Square opening 24 First receptacle at the first free end of the retaining plate 22 24a Second receptacle at the second free end of the retaining plate 22 25 Hex screw 26 First complementary receptacle on the first angled bracket 16 26a Second complementary receptacle on the first angled bracket 16 27 Locking latch 28 First slip ring / brush unit on the first cable drum 18 29 Second slip ring / brush unit on the second cable drum 30 Cable winding of a data cable 31 on the first cable drum 18 30a Cable winding of the data cable 31 on the second cable drum 18a 31 Data cable 32 First pressure fork on the cable winding 30 of the Data guide cable 31 on the first cable drum 18 32a Second pressure fork on the cable reel 30 of the data guide cable 31 on the first cable drum 18 33 Swivel pin on the first pressure fork 32 33a Swivel pinon the second pressure fork 32a 34 Pressure roller 35 Carrier unit with cable connection 36 from the carrier unit 35 to the first grinding brush assembly 10 36 Cable connection from the carrier unit 35 to the first grinding brush assembly 10 37 Cable connection from the first slip ring grinding brush unit 28 to the 30 first grinding brush assembly 10 on the carrier 9 38 Cable connection from the second slip ring grinding brush unit 29 to the first grinding brush assembly 10 on the carrier 9 39 Cable connection from the second slip ring grinding brush unit 29 to the first grinding brush assembly 10 on the carrier 9

Claims

1. Drilling rig with a cable reel for inserting a data cable (31) into a drill string (6) comprising a plurality of tubular rod sections of a drilling rig that are rotatably coupled to one another, the drilling rig comprising - a power rotary head (1), - a drill string (6) rotatably coupled thereto and comprising a plurality of tubular rod sections rotatably coupled to one another, - a drum support (12) rotatably coupled to the power rotary head (1), - at least one cable drum (18) rotatably mounted on the drum support (12), - a first rotary feedthrough (3, 10) on the drill string (6) comprising a plurality of tubular rod sections rotatably coupled to one another for passing a cable harness of a data cable (31) to the outside, - a second rotary feedthrough (28, 29) for the cable harness of the data cable (31) from the cable drum (18) to the drum support (12), characterized by - a outlet flange pipe (2) rotatably coupled to the power rotary head (1), - a drum support (12) rotatably coupled to the outlet flange pipe (2), - at least one cable feedthrough (5a) arranged on the outlet flange pipe (2) for the cable harness of the data cable (31) from the at least one cable drum (18, 18a) into the drill string (6) comprising a plurality of tubular rod sections rotatably coupled to one another.

2. Drilling rig with a cable reel according to claim 1, characterized in that the outlet flange pipe (2) is designed in multiple parts and comprises a rotatably coupled, tubular intermediate piece (5) and a threaded transition piece (11), wherein the cable feedthrough (5a) for the cable harness of the data cable (31) can be arranged in the outlet flange pipe (2) or in the tubular intermediate piece (5).

3. Drilling rig with a cable reel according to claim 1 or 2, characterized in that the drill string (6) comprising a plurality of rotatably coupled, tubular rod sections comprises at least the outlet flange pipe (2), a tubular intermediate piece (5) rotatably coupled thereto with the cable feedthrough (5a) and with the outlet flange pipe (2) or the tubular intermediate piece (5) rotatably coupled to each other tubular rod sections that can be rotatably coupled to one another, through which the cable string of the data cable (31) is guided to a drill head at the front end of the drill string (6) comprising a plurality of rotatably coupled, tubular rod sections.

4. Drilling rig with a cable reel according to one of claims 1 to 3, characterized in that the cable feedthrough (5a) comprises one or more sealing arrangements (5b) which act as seals with respect to the interior of the drill string (6) comprising the plurality of rotatably coupled tubular rod sections.

5. Drilling rig with a cable reel according to one of claims 1 to 4, characterized in that the drum support (12) has at least one support shaft (13, 13a) directed approximately perpendicular to the axis (35) of the outlet flange pipe (2) for rotatably supporting the at least one cable drum (18, 18a), wherein a first slip-ring-contact-brush unit (28) and a second slip-ring-contact-brush unit (29) are insulatingly arranged on each of the cable drums (18, 18a), from each of which cable connections (38, 39) lead to the first contact-brush arrangement (10) on the support (9) and from there via the cable connection (37) to a support device (36) which receives and processes the signals in order to supply a directional control device arranged in the drill head with corresponding signals.

6. Drilling rig with a cable reel according to one of claims 1 to 5, characterized in that at least one angled bracket (16, 16a) for a pressure fork (32) is arranged on the drum support (12), a retaining plate (22, 22a) for the at least one cable drum (18, 18a) is fixed in a non-rotatable manner at the free end of the at least one support shaft (13, 13a) on the drum support (12) for the at least one cable drum (18, 18a), wherein this retaining plate (22, 22a) has, at at least one free end, a receptacle (24, 24a) aligned with a complementary receptacle (26, 26a) on the angled bracket (16, 16a) for the opposite free ends of a pivot pin (33, 33a) on a spring or weight-loaded pressure fork (32, 32a) for a cable winding (30) of the data cable (31) on the at least one cable drum (18, 18a).

7. Drilling rig with a cable reel according to one of claims 1 to 6, characterized in that the pressure fork (32, 32a) comprises a pressure roller (34) resting freely or with braking on the cable winding (30, 30).

8. Drilling rig with a cable reel according to one of claims 1 to 7, characterized in that a support (9) for an insulating reception of the first contact-brush arrangement (10) is attached to the power rotary head (1).

9. Drilling rig with a cable reel according to one of claims 1 to 8, characterized in that the drum support (12) is clamped, glued, welded, or screwed to the outlet flange pipe (2) or the tubular intermediate piece (5).

10. Drilling rig with a cable reel according to one of claims 1 to 9, characterized in that the drum support (12) comprises two coaxially oppositely directed support shafts (13, 13a) for one cable drum (18, 18a) each.

Images