DE102018130065A1 - Adapter arrangement for connecting a drilling tool to a drill pipe - Google Patents

Abstract

An adapter arrangement (100) for connecting a drilling tool (20, 24) to a drill pipe (14) comprises a first element (110) which has a first end which can be connected or connected to the drill pipe (14), a first threaded section (132) to a Has external thread and a portion (116) with a non-circular cross-section. The first element (110) has a cylindrical first contact region (136) which is adjacent to the first threaded section (132) or is arranged at a distance from the first threaded section. The adapter arrangement (100) has a second element (112) which has a second end which can be connected or connected to the drilling tool (20, 24) and a second threaded section (134) which is complementary to the first threaded section (132) and has an internal thread and a section (120 ) with a non-circular cross-section and which is suitable for establishing a connection with the first element (110). The second element (112) has a second contact area (138) which is adjacent to the second threaded section (134) or is arranged at a distance from the second threaded section (134) and is designed as a cylindrical recess. The first element (110) and the second element (112) can be connected to one another in such a way that the thread of the first thread section (132) and the thread of the second thread section (134) are in engagement. The adapter arrangement (100) has a third element (114), which is designed and can be arranged in such a way that, when the first and second elements (110, 112) are connected, they each have a region (116, 118) of the first and second elements (110 , 112) encloses with a non-circular cross section and is in engagement with these regions (116, 118).

Description

The invention relates to an adapter arrangement for connecting a drilling tool to a drill pipe, which has a first element which has a first end which can be connected in the drill pipe or the drilling tool, a first threaded section with an external thread and a non-circular cross section. The first element also has a cylindrical first contact region which adjoins the first threaded section or is arranged at a distance from the first threaded section. The adapter arrangement also has a second element which has a second end which can be connected or connected to the drilling tool or the drill rod and a second threaded section which is complementary to the first threaded section and has an internal thread and a section with a non-circular cross section. The second element is suitable for establishing a connection with the first element, the second element having a second contact area which is adjacent to the second threaded section or is arranged at a distance from the second threaded section and is designed as a cylindrical recess. The first element and the second element can be connected to one another in such a way that the thread of the first threaded section and the thread of the second threaded section engage. The adapter arrangement comprises a third element, which is designed and can be arranged in such a way that, when the first and second elements are connected, it surrounds a region of the first and second element with a non-circular cross section and is in engagement with these regions.

Drilling tools can be both drilling heads for producing a pilot hole and expanding tools for expanding a through hole in the ground. The adapter arrangement is used in particular for directional horizontal bores (HDD - Horizontal Directional Driling), for example in a horizontal rinsing drilling method. With such horizontal drilling methods, pipelines can be laid underground without having to dig a trench. A horizontal drilling device creates an underground opening in the tunnel and widens the opening in the retreat while simultaneously pulling in one or more pipes. When drilling and preferably expanding, the drilling tool is usually rotated.

When the drilling tools are rotated, high torques occur which cause a high tightening force in the case of a screw connection between the drill pipe and the drilling tool or in the case of an adapter for connecting the drilling tool to the drill pipe, so that considerable forces are then required to release this connection. In the prior art, adapter arrangements for connecting drilling tools and drill rods are known, which have a sliding sleeve which is pushed over the connection point between the drill rod and the drilling tool and then the torque between the contour of its through opening and the contour of the outer surface of the connecting elements of the adapter arrangement transmits the connecting elements. When flushing liquid is used to produce the horizontal bore, it is passed through a linkage composed of several linkage sections via the connection arrangement to the drilling tool. At the connection point between the connecting elements, the problem then arises that drilling fluid can escape, particularly when the linkage or the adapter arrangement is subjected to a lateral force, and in particular can enter and damage a threaded section for connecting the connecting elements.

From the document DE 101 15 233 A1 A horizontal drilling machine is known in which a high-pressure pump for supplying flushing liquid to the drill pipe and a mixing device for preparing the flushing liquid with a mixing unit having a mixing pump are arranged on the chassis of the horizontal drilling machine.

From the document DE 10 2015 107 194 A1 a drilling system for producing or widening an earth borehole is known, in which the advance of the rod is regulated depending on the torque for rotating the rod. When the drilling tool is advanced, flushing liquid can be passed through the drill pipe to the drill head. Other horizontal drilling rigs with a feed drive for driving a drill rod carrying a drilling tool, which is pushed into the ground while being rotated with the aid of a feed drive, are from the documents DE 10 2010 004 287 A1 and US 6,189,628 B1 known.

document DE 199 01 001 A1 discloses an earth drilling rig in which a drive carriage for driving a drill pipe is provided, which has a corresponding connection for supplying flushing liquid.

It is an object of the invention to provide an adapter arrangement for connecting a drilling tool to a drill pipe. Which enables a secure connection.

This object is achieved by an adapter arrangement for connecting a drilling tool with the features of claim 1. Beneficial Developments are specified in the dependent claims.

In particular, by the provision of the first contact area, which is in engagement with the second contact area, forces can be safely transmitted transversely to the longitudinal axis of the linkage and to the longitudinal axis of the adapter between the first and the second element, so that there is little or no deflection in the area of the adapter arrangement a lateral force is exerted on the adapter arrangement, so that a stable connection which is sealed in connection with the sealing element is ensured between the first element and the second element even with large forces acting on the adapter arrangement.

It is particularly advantageous if the first contact area and the second contact area are designed such that when the first element and the second element are connected they engage in such a way that when a force is applied transversely to the longitudinal axis of the linkage, a force transversely to the longitudinal axis between the first contact area and the second contact area is transmitted. In this way, a stable and secure connection between the first element and the second element is achieved.

It is also advantageous if the first thread section is arranged between the first contact area and a cylindrical third contact area and if the second thread section is arranged between the second contact area and a fourth contact area formed in a further cylindrical recess. The third contact area and the fourth contact area are then designed such that they engage when the first element and the second element are connected.

It is hereby achieved that the forces acting on the engaging threaded sections of the first element and the second element are kept small when the force is applied transversely to the longitudinal axis of the linkage.

Furthermore, it is advantageous if the third contact area and the fourth contact area are designed such that when the first element and the second element are connected they engage in such a way that when a force is applied transversely to the longitudinal axis of the linkage, a force transversely to the longitudinal axis between the third contact area and the fourth contact area is transmitted. This ensures that when forces are applied transversely to the longitudinal axis of the linkage, forces are transmitted via the first and second contact areas as well as via the third and fourth contact areas, so that the adapter arrangement itself can absorb relatively large transverse forces without the adapter arrangement itself being bent and the stability and tightness of the connection is impaired.

Furthermore, it is advantageous if the first contact area and the second contact area form a fit, in particular a press fit, clearance fit or transition fit. Alternatively or additionally, the third contact area and the fourth contact area can form a fit, in particular a press fit, clearance fit or transition fit. This ensures that complementary contact areas are designed in such a way that they abut one another securely even at low transverse forces acting on the adapter arrangement and transmit corresponding transverse forces.

It is particularly advantageous if the diameter of the first contact area is smaller than the diameter of the second contact area by a value in the range from 6/100 mm to 8/100 mm. Alternatively or additionally, the diameter of the third contact area can be smaller by a value in the range from 6/100 mm to 8/100 mm than the diameter of the fourth contact area. This enables safe power transmission between the contact areas.

It is particularly advantageous if the sealing element is inserted into the circumferential groove in such a way that a part of the sealing element protrudes circumferentially from the groove. As a result, the sealing element can be pressed together when connecting the first element to the second element and achieve a particularly good sealing effect. By compressing the sealing element in the connected state of the first and second elements, the sealing element can be relaxed or decompressed at least in areas if, due to the force transmission between the first contact area and the second contact area, a gap in partial areas between the first contact area and the second contact area is created or enlarged, so that the sealing element seals reliably even in this state.

It is particularly advantageous if the first contact area has at least one second circumferential groove into which a second sealing element is inserted. The second sealing element is preferably inserted into the circumferential groove in such a way that a part of the sealing element protrudes circumferentially from the groove. The first and / or the second sealing element are preferably designed as an O-ring. As a result, a safe and proven sealing element can also be used to seal the adapter arrangement.

Furthermore, one or two grooves can be provided in the third contact area, in each of which a sealing element is inserted, which is preferably elastically deformable and of which a part of the sealing element preferably protrudes all the way out of the groove. In this way, a two-sided sealing of the first and second threaded section is possible easily and safely.

It is particularly advantageous if the first element and the second element each have an external polygon or external multi-tooth, preferably an external hexagon, in the region with a non-circular cross section. The third element preferably has a complementary opening to the regions with a non-round cross section of the first element and the second element. This opening is designed in particular as an internal polygon, an internal multi-tooth, in particular as an internal hexagon.

This creates a simple possibility of ensuring that the regions with a non-round cross section of the first element and the second element engage with the third element, so that rotation of the first element relative to the second element about the longitudinal axis of the linkage and torque transmission are not possible between the first element and the second element takes place essentially via the third element.

Furthermore, it is advantageous if the third element is designed as a sliding sleeve and, in the connected state, can preferably be connected to the first and / or second element with at least one locking screw and / or at least one locking pin, in particular at least one locking pin or locking pin, the locking pin in an opening, preferably a circumferential groove, engages in the first element or in the second element. This enables simple design and securing of the third element, so that the third element is secured against slipping, so that it is reliably prevented that the sliding sleeve only engages with the first element or with the second element or with none of these elements stands. By engaging in a circumferential groove, rotation of the first element with respect to the third element or the second element with respect to the third element can be made possible, in particular a rotational movement between the first and the third element or between the second and the third element in succession a torque transmission between the first element and the third element or the second element and the third element and with a play between the non-circular cross-sectional area of the first element and the third element and / or the non-circular cross-sectional area of the second element and the third element.

It is also advantageous if both the internal thread and the external thread are tapered threads. These can in particular be NPT threads (NPT = National Pipe Thread), Whitworth threads or metric tapered threads. As a result, the threaded sections can seal when the first element and the second element are connected, so that in addition to the sealing element provided, a further sealing function is provided, in particular to prevent flushing liquid from flowing through the threaded regions connected to one another.

It is particularly advantageous if a check valve is arranged in the through opening of the first element or the second element, which only allows fluid, in particular flushing liquid, to pass from the drill pipe to the drilling tool. This ensures that when the first element is separated from the second element, no dirt or flushing liquid can penetrate into the drill string connected to the respective element or drilling tool connected to the element. The check valve also prevents the pipeline formed by the hollow drill pipe from being emptied by flushing liquid if no flushing liquid is introduced into the pipe.

It is particularly advantageous if the check valve comprises a closing element, an elastically deformable element and a sealing cone, the elastically deformable element pressing the closing element against the sealing cone in the closed state of the non-return valve and / or if the elastically deformable element in the opened state of the non-return valve a fluid flow flowing through the check valve is deformed such that the closing element is pressed against a second cone. This ensures that the closing element is securely in its position, i.e. when the check valve is open and when the check valve is closed. remains in the closed position and in the open position of the check valve. It is advantageous if the closing element is a ball and the elastically deformable element is a spring or an elastomer block. The spring is in particular a spiral spring, preferably a compression spring. This enables a simple, inexpensive and safe construction of the adapter arrangement.

Further features and advantages emerge from the following description, which explains the invention in more detail on the basis of exemplary embodiments in conjunction with the attached figures.

• 1A eine schematische Darstellung einer Bohranlage zum gesteuerten Bohren einer Pilotbohrung, mit der eine Durchgangsöffnung im Erdreich erzeugt wird, die nachfolgend mithilfe eines Aufweitwerkzeugs aufweitbar ist;
• 1B einen vergrößerten Ausschnitt der Bohranlage nach 1A, wobei der Bohrkopf zum Erzeugen der Pilotbohrung dargestellt ist;
• 1C eine schematische Darstellung einer Bohranlage zum Aufweiten der mit der Bohranlage nach 1A erzeugten Pilotbohrung mithilfe eines Aufweitwerkzeugs;
• 1D einen vergrößerten Ausschnitt der Bohranlage nach 1C, wobei das Aufweitwerkzeug zum Aufweiten der Pilotbohrung dargestellt ist;
• 2 eine Adapteranordnung, bei der die Verbindungselemente der Adapteranordnung getrennt voneinander angeordnet sind, gemäß einer ersten Ausführungsform;
• 3 eine Schnittdarstellung der Adapteranordnung nach 2 im verbundenen Zustand der Verbindungselemente;
• 4 eine Adapteranordnung 100a, bei der die Verbindungselemente getrennt voneinander angeordnet sind, gemäß einer zweiten Ausführungsform;
• 5 eine Schnittdarstellung der Adapteranordnung nach 4, bei der die Verbindungselemente der Adapteranordnung miteinander verbunden sind;
• 6 ein mit einem Aufweitwerkzeug verbundenes Verbindungselement der Adapteranordnung nach den 2 bis 5;
• 7 eine Schnittdarstellung eines Verbindungselements einer weiteren Adapteranordnung gemäß einer dritten Ausführungsform;
• 8 eine Schnittdarstellung einer Adapteranordnung gemäß einer vierten Ausführungsform, wobei die Verbindungselemente der Adapteranordnung miteinander verbunden sind;
• 9 Elemente eines Rückschlagventils gemäß der dritten und vierten Ausführungsform nach den 7 und 8 in einer Explosionsdarstellung;
• 10 eine vergrößerte Schnittdarstellung des Rückschlagventils gemäß der dritten Ausführungsform nach 7 im geschlossenen Zustand;
• 11 das Rückschlagventil nach 10 in einem geöffneten Zustand; und
• 12 eine perspektivische Explosions-Schnitt-Darstellung der Elemente des Rückschlagventils nach 11.

Show it:

• 1A is a schematic representation of a drilling system for controlled drilling of a pilot hole, with which a through hole is created in the ground, which can subsequently be expanded using an expanding tool;
• 1B an enlarged section of the drilling rig after 1A , wherein the drill head for producing the pilot bore is shown;
• 1C is a schematic representation of a drilling rig to expand the with the drilling rig after 1A pilot bore generated using an expanding tool;
• 1D an enlarged section of the drilling rig after 1C , wherein the expanding tool for expanding the pilot bore is shown;
• 2nd an adapter arrangement, in which the connecting elements of the adapter arrangement are arranged separately from one another, according to a first embodiment;
• 3rd a sectional view of the adapter assembly 2nd in the connected state of the connecting elements;
• 4th an adapter arrangement 100a , in which the connecting elements are arranged separately from one another, according to a second embodiment;
• 5 a sectional view of the adapter assembly 4th , in which the connecting elements of the adapter arrangement are connected to one another;
• 6 a connecting element of the adapter arrangement according to FIGS 2nd to 5 ;
• 7 a sectional view of a connecting element of a further adapter arrangement according to a third embodiment;
• 8th a sectional view of an adapter arrangement according to a fourth embodiment, wherein the connecting elements of the adapter arrangement are connected to each other;
• 9 Elements of a check valve according to the third and fourth embodiment according to the 7 and 8th in an exploded view;
• 10th an enlarged sectional view of the check valve according to the third embodiment 7 in the closed state;
• 11 the check valve after 10th in an open state; and
• 12 a perspective exploded sectional view of the elements of the check valve after 11 .

In 1A is a drilling rig 10th shown for controlled drilling of a pilot hole. The drilling rig 10th works according to a controlled horizontal drilling process, which is also referred to as horizontal directional drilling (HDD) process. In the present exemplary embodiment, a horizontal drilling machine available under the trade name Terra-Jet is used for this. Such a horizontal drilling machine is for example from the document DE 101 15 233 A1 known. In the HDD process, one is made up of several rod sections 13 composite linkage 14 with the help of a horizontal drilling machine 12 at a starting point 16 with one on the horizontal drilling machine 12 distant end of the boom 14 arranged drill head 20th in the direction of the arrow P0 in the ground 18th brought in. The horizontal drilling machine 12 has a pump 42 that over a hose 48 Rinsing liquid 46 from a rinsing liquid container 40 sucked in and with high pressure into the hollow frame 14 promotes. The rinsing liquid 46 occurs at high pressure on the drill head 20th out. Due to the high pressure and hard metal teeth of the drill head 20th becomes a borehole in the ground 18th cut.

The drill head 20th is asymmetrically flattened at its front end and is made using the linkage 14 continuously rotated to create a straight borehole. With a desired lateral movement, upward movement or downward movement, the drill head 20th stopped in a position suitable for this desired movement and not turned further, so that due to the asymmetrically flattened shape of the front end of the drill head 20th a corresponding deflection movement of the drill head 20th in the ground 18th he follows. In 1B is a detailed view of the of the horizontal drilling machine 12 distant end of the boom 14 together with the drill head 20th shown. In the drill head 20th an electronic probe is arranged, which can be located at any time from the surface of the earth with the help of a suitable locating device, so that the position of the drill head 20th in the ground 18th can be determined exactly at any time.

The trajectory of the drill head 20th and thus the course of the drilling channel 15 the pilot hole is simply controlled by stopping the rotation of the drill head 20th about the linkage 14 controlled so that the control surface of the drill head 20th is brought into a position required for the desired movement. Even after deliberately stopping the rotation of the drill head 20th is using the pump 42 continue rinsing liquid 46 by the Linkage 14 promoted and the drill head 20th will continue on the linkage 14 advanced so that using the flushing liquid 46 and the advance of the drill head 20th drilling of the desired course of the borehole is continued.

After reaching the destination 22 , which is provided, for example, in a target pit, becomes the drill head 20th through an expanding head 24th replaced when pulling the boom 14 the pilot hole previously created expands and at the same time an HDPE pipe 26 moves in like this in the 1C and 1D is shown. HDPE pipes are made of high-density polyethylene, this high-density polyethylene is a thermoplastic with high density, so that the pipes made of HDPE have high toughness and rigidity, very good chemical resistance, good sliding properties, low Moisture absorption, very good processing properties, can be welded very well and are physiologically harmless. In other embodiments, tubes can also 26 made of other materials, in particular metal.

The horizontal drilling machine 12 generates the required pulling force on the boom 14 and continues to conduct rinsing liquid 46 to the expanding head 24th . The rinsing liquid 46 supports at least the expansion of the pilot hole and also serves to discharge and discharge the excess soil loosened during the expansion process 18th . Especially with stony soil 18th , Scree and rock must have at least a part of it using the expanding tool 24th during the expansion process contacted soil 18th be dissipated. This can be due in particular to the annular gap between the bores 15 designated already expanded area of the pilot bore and the drawn pipe 26 respectively. The rinsing liquid introduced into the annular gap 46 also reduces the skin friction between the pipe 26 and the drilling channel 15 .

At the same time as the expansion process, the new pipe to be installed 26 , in the present case an HDPE pipe. Depending on the surface, two or more expanding tools can also be used 24th can be used successively with a diameter of usually up to 1000 mm. Then pipes can be used 26 up to a diameter of 800 mm or a tube bundle consisting of several tubes. As a rinsing liquid 46 For example, water with concrete or polymers can be used. Such rinsing liquids 46 stabilize the drilling channel 15 , reduce the friction between drill pipes 14 and soil 18th as well as the friction between the pipe to be drawn in 26 and the earth 18th . Furthermore, using the rinsing liquid 46 soil 18th through the already partially drawn pipe 26 from the drilling channel 15 promoted.

1D shows an enlarged section of the in 1C shown arrangement 10th . In this section these are from the horizontal drilling machine 12 distant end of the boom 14 , the expanding head 24th and already partially in the ground 18th retracted pipe 26 shown.

A control unit 50 of the horizontal drilling machine 12 , in particular a programmable logic controller (PLC), controls the pump 42 to convey the rinsing liquid 46 through the linkage 14 at. The pump 42 is through the control unit 50 in particular controllable such that the volume flow through the pump 42 promoted and thus the at the drilling or expanding head 20th , 24th escaping rinsing liquid 46 is controllable.

The horizontal drilling machine 12 preferably has a rotary drive for rotating the boom 14 about a longitudinal axis and the feed drive for moving the boom 14 along its longitudinal axis through the soil 18th together with the end of the linkage that is remote from the feed drive 14 connected to this drill head 20th or expanding head 24th .

The connection between linkages 14 and drill head 20th as well as between poles 14 and expanding head 24th takes place via an adapter arrangement 100 , the following in connection with the 2nd to 12 is explained in more detail.

2nd shows a perspective view of the adapter assembly 100 . The adapter arrangement 100 comprises a first connecting element 110 that with a first boom section of the boom 14 is connected, and a second connecting element 112 that with a drilling tool, such as a drill head 20th or an expanding head 24th , connected is. Furthermore, the adapter arrangement 100 a third connector 114 that over an area with a non-cylindrical surface 116 of the first connecting element 110 and over an area with a non-cylindrical outer surface 118 of the second connecting element can be pushed. In the following embodiment, the areas 116 , 118 each have a hexagonal cross-section, the cross-sectional opening 120 of the third connecting element 114 one to the outer cross sections of the areas 118 , 116 has complementary internal cross-section, so that a torque from the linkage 14 on the drilling tool 20th essentially via the third connecting element 114 is transferable. The first connector 110 also has a section 122 with a smaller cross section than the non-cylindrical area 116 so that the third connector 114 at least partially over the section 122 can be pushed so that it is out of engagement with the non-cylindrical area 118 of the second connecting element 112 comes to this relative to the first connecting element 110 to turn. This makes it possible to connect and disconnect the first and second connecting elements 110 , 112 possible. The third connecting element can be moved so that it is both non-cylindrical areas 116 , 118 of the first connecting element and the second connecting element at least partially encloses. The third connecting element is also referred to as a sliding sleeve. In this state, the transmission of large torques between the linkages 14 and drilling tool 20th , 24th possible.

The adapter arrangement also includes 100 two locking screws 124 , 126 , each through a through opening 130 in the third connecting element 114 in each one in the first connecting element 110 existing hole provided with an internal thread 129 are screwable to the third connecting element 114 to keep in a correct position when connected. In the non-cylindrical connection area 116 of the first connecting element 110 a groove is also provided in the openings 130 , 131 of the third connecting element 114 inserted locking pins in the connected state of the elements 110 , 112 , 114 the adapter arrangement 100 intervention. These locking pins can alternatively or in addition to the locking screws 124 , 126 be provided, as will be explained in more detail below.

The first connector 110 also has an area with a conical external thread 132 that with a conical internal thread in the second connecting element 112 can be connected, as will be explained in more detail below.

3rd shows a sectional view of the adapter arrangement 100 to 2nd in the connected state of the connecting elements 110 , 112 , 114 . The external thread 132 of the first connecting element 110 stands with an internal thread 134 engaged so that a screw connection between the first and the second element 110 , 112 consists. The engagement of the inner cross-sectional opening of the third connection element 114 with the areas 116 , 118 prevents further rotation of the first connecting element 110 and the second connecting element 112 relative to each other, so that the screw connection between the threaded sections 132 , 134 in a torque transmission between the first connecting element 110 and the second connecting element 112 no longer be screwed together with greater forces.

The first connector 110 has a first cylindrical contact area 136 with a through a cylindrical opening in the second connecting element 112 formed second contact area 138 is engaged. In the first cylindrical contact area 136 are two circumferential grooves 140 , 142 available, each with a sealing element 144 , 146 is arranged. About the contact areas 136 , 138 can in particular transverse to the longitudinal axis L the adapter arrangement 100 forces acting between the first connecting element 110 and the second connecting element 112 be transmitted. The first connecting element also comprises 110 a third contact area 148 which with another in the cylindrical opening of the second connecting element 112 existing contact area 150 is engaged. Also over the third contact area 148 and the fourth contact area 150 can forces transverse to the longitudinal axis of the adapter assembly 100 be transmitted. As in 3rd can be seen, the locking screws 124 , 126 designed as Allen screws.

The threaded sections 132 , 134 as well as the contact areas 136 , 138 , 148 , 150 are arranged and designed in such a way that no surfaces 152 , 154 in a plane transverse to the longitudinal axis of the adapter arrangement 100 are provided, which are in the connected state of the connecting elements 110 , 112 , 114 contact so that there is a slight further rotational movement of the first connecting element 110 relative to the second connecting element 112 pressed against each other. Rather, the first and the second connecting element 110 , 112 formed and arranged in the connected state such that between such surfaces 152 , 154 A gap 155 remains. This will loosen the screw connection via the threaded sections 132 , 134 simplified when the fasteners 110 , 112 , 114 to be separated again.

The first thread section 132 is between the first contact area 136 and the third contact area 148 arranged. The second thread section 134 is thus between the second contact area 138 and the contact area 150 arranged. Both the first connector 110 as well as the second connecting element 112 each have continuous cylindrical openings 156 , 158 , through the rinsing liquid 46 through an inner through opening of the rod 14 through the through opening 156 , 158 the adapter arrangement 100 to the drilling tool 20th , 24th is directed.

As in 2nd can be seen, the third connecting element has two annular elevations 160 , 162 that are in the direction of the longitudinal axis L the adapter arrangement 100 are arranged at a distance from each other and several elevations 164 to 168 , which are preferably at equal angular intervals to the third connecting element 114 are arranged around the outer surface. As a result, the third connecting element 114 even in adverse environmental conditions, especially in a construction site operation, with the flushing liquid 46 outside of the adapter assembly 100 attached, operated by an operator, in particular rotated and moved. In the first embodiment according to the 2nd and 3rd the third connecting element is secured 114 only with the help of the locking screws 124 , 126 and not with the help of additional locking pins.

4th shows an adapter arrangement 100a where the fasteners 110 , 112 , 114 are arranged separately from one another, according to a second embodiment. The same elements have the same reference symbols. In contrast to the first embodiment according to the 2nd and 3rd are two locking pins in the second embodiment 170 , 172 Provided, which are designed in particular as spring pins, for example as heavy duty pins and in the corresponding openings 130 , 131 of the third connecting element 114 be introduced after the fasteners 110 , 112 , 114 have been linked together. Preferably the dowel pins 170 172 or the heavy-duty locking pins 170, 172 into the openings 130 , 131 smashed. The use of the pens 170 , 172 are connected by those in the area 116 inserted groove 174 guided. In other embodiments, instead of the groove 174 only a recess can be provided in the area in which the pins 170 , 172 the first connector 110 to contact.

5 shows a sectional view of the adapter arrangement 100a to 4th , with the section plane in 4th lies in a horizontal plane. In this sectional view after 5 are the connecting elements 110 , 112 , 114 shown in a connected state. The dowel pins 170 , 172 are through an area of the groove 174 guided.

6 shows a with the second connecting element 112 connected expansion tool 180 that instead of the expanding tool 24th after the 1c and 1d can be used. On the along the longitudinal axis in the connecting element 112 opposite end of the expanding tool 180 is a connecting element 182 provided with an opening opposite the expanding tool 180 is freely rotatable and via which a further expanding tool and / or a tube to be inserted into the expanded opening 26 can be connected.

7 shows a sectional view of a first connecting element 110a according to a third embodiment. The first connector 110a can be used in conjunction with the adapter arrangement 100 the first embodiment as well as in connection with the adapter arrangement 100a the second embodiment can be used. In contrast to the connecting element 110 has the connector 110a additionally a check valve 190 that in an area of the continuous opening 156 of the first connecting element 110a is arranged and the through opening 156 only opens at a preset minimum flushing fluid pressure and the flushing fluid 46 through the opening 156 lets through.

8th shows a sectional view of an adapter arrangement 100b according to a fourth embodiment, wherein the connecting elements 110b , 112 , 114 are interconnected and the connecting element 112 in one piece with the drilling tool 20th , 24th , 180 is trained. At the end of the passage opening 158 in the second connecting element 112 branch channels 178 starting by parts of the drilling tool 20th , 24th , 180 through to outlet openings or outlet nozzles of the drilling tool 20th , 24th , 180 to lead. With the first connecting element 100b is different from the first connecting element 100a to 7 the distance between the front end of the first element 110a and the check valve 190 enlarged. In other embodiments, a check valve can also be used 190 in the boom section of the boom 14 be arranged with which the first connecting element 100 , 100a , 100b connected is.

9 shows elements of the check valve 190 according to the third and fourth embodiment according to the 7 and 8th in an exploded view. The check valve 190 includes a guide sleeve 192 , a closing ball 194 , a closing spring 196 and a counterpart for mounting the closing spring 196 . The closing spring 196 is in particular a spiral compression spring.

10th shows an enlarged sectional view of the check valve 190 according to the third embodiment 7 in the closed state. The closing ball 194 is by the spring 196 against a locking cone 193 the guide sleeve 192 pressed so that no rinsing liquid 46 out of the opening 56 of the first connecting element 100b can flow out and no dirt through the opening 156 in the linkage 14 can penetrate. The feather 196 and the bullet 194 are dimensioned such that the ball 194 with a minimum flushing pressure provided away from the sealing cone 143 against the spring force of the spring 196 against a second cone 199 who in the counterpart 198 is provided is pressed. By placing the ball 194 on the cone 199 becomes a swing of the ball 194 with the check valve open 190 avoided.

Flows the rinsing liquid 46 through the guide sleeve 192 , the ball 194 forward against the spring force of the spring 196 moved and against the cone 199 pressed like this in 11 is shown. The rinsing liquid 46 flows on the closing ball 194 past and through openings in the counterpart 198 continue to the second connecting element 112 and through this to the drilling tool 20th , 24th , 180 through it.

For example, when changing the boom, ie when adding another boom section to the boom 14 or when removing a boom section from the boom 14 , the flushing fluid pump 42 turned off, the flushing pressure drops to ambient pressure and the spring force of the spring 196 presses the closing ball 194 against the sealing cone 193 so that the closing ball 194 in the in 10th position shown is arranged.

12 shows a sectional exploded view of the elements of the check valve 190 . It can be seen here that the guide sleeve 192 several guide ribs 200 , 202 , in particular four, five or six longitudinal ribs for guiding the movement of the closing ball 194 from the closed to the open state and from the open to the closed state. The guide ribs 200 , 202 are equally spaced around the longitudinal axis L arranged around and run parallel to the longitudinal axis L . At the same time are between the guide ribs 200 , 202 Flushing fluid channels 204 to 208 provided by which the rinsing liquid 46 on the between the guide ribs 200 , 202 arranged closing ball 194 with the check valve open 190 over and through the flushing liquid channels 204 to 208 further into rinsing liquid channels 210 to 218 in the counterpart 198 so that the rinsing liquid 46 in the second connecting element 112 and from there to the drilling tool 20th , 24th , 180 reached.

In alternative embodiments, the first element 100 , 100a , 100b also with the drilling tool 20th , 24th , 180 and the second element 114 with the linkage 14 be connected.

Reference symbol list

10th

Drilling rig

12

Horizontal drilling machine

13

Boom sections

14

Linkage

15

Drilling channel

16

Starting point

18th

soil

20, 24

Drilling tool

22

Target point

26

pipe

40

Rinsing liquid container

42

pump

46

Rinsing liquid

48

tube

50

Control unit

56

opening

100, 100a

Adapter arrangement

110, 110a

first connecting element

112

second connecting element

114

third connecting element

116, 118

Area

120

Cross-sectional opening

122

section

124, 126

Locking screw

129

hole

130, 131

opening

132, 134

Thread section

136, 138, 148, 150

Contact area

140, 142

Groove

143

Sealing cone

144, 146

Sealing element

152, 154

area

155

gap

156, 158

opening

160, 162, 164 to 168

Survey

170, 172

Locking pin

174

Groove

178

channels

180

Drilling tool

182

Fastener

190

check valve

192

Guide sleeve

193

Sealing cone

194

Closing ball

196

Closing spring

198

Counterpart

199

second cone

200, 202, 204 to 208

Guide rib

210 to 218

Flushing fluid channel

L

Longitudinal axis

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 10115233 A1 [0004, 0027]
• DE 102015107194 A1 [0005]
• DE 102010004287 A1 [0005]
• US 6189628 B1 [0005]
• DE 19901001 A1 [0006]

Claims (15)

Adapter arrangement for connecting a drilling tool to a drill string, having a first element (110) which has a first end which can be connected or connected to the drill string (14) or to the drilling tool (20, 24, 180), a first threaded section (132) having a Has an external thread and a section (116) with a non-circular cross-section, the first element (110) having a cylindrical first contact area (136) adjacent to the first threaded section (132) or arranged at a distance from the first threaded section (132), with a second element (112), which has a second end connectable or connected to the drilling tool (20, 24, 180) and a second threaded section (134) complementary to the first threaded section (132) with an internal thread (134) and a section (118) has non-circular cross-section and which is suitable for establishing a connection with the first element (110), the second element (112) one on the second Ge has the second contact area (138) adjacent to or at a distance from the second threaded section (134) in the form of a cylindrical recess, the first element (110) and the second element (112) being connectable to one another such that the thread of the the first threaded section (132) and the thread of the second threaded section (134) are in engagement with a third element (114) which is designed and can be arranged in such a way that, when the first and second elements (110, 112) are connected, one each Area (116, 118) of the first and second element (110, 112) encloses with non-circular cross-section and engages with these areas (116, 118), characterized in that the first contact area (136) and the second contact area (138) are designed such that they are in engagement when the first element (110) and second element (112) are connected such that the first element (110) and the second el ement (112) each have an opening (156, 158) which, when the first and second elements (110, 112) are connected, form a through opening from the first end to the second end through which a fluid (46) from the drill pipe (14 ) to the drilling tool (20, 24, 18) and that the first contact area (136) has at least one circumferential groove (140, 142) into which a sealing element (144, 146) is inserted. Adapter arrangement after Claim 1 , characterized in that the first contact area (136) and the second contact area (138) are designed such that when the first element (110) and the second element (112) are connected they engage in such a way that when a force is applied transversely to the Longitudinal axis (L) of the linkage (14) a force is transmitted transversely to the longitudinal axis (L) between the first contact area (136) and the second contact area (138). Adapter arrangement after Claim 1 or 2nd , characterized in that the first threaded section (132) is arranged between the first contact area (136) and a cylindrical third contact area (148), that the second threaded section (134) between the second contact area (138) and one in a further cylindrical recess fourth contact area (150) is arranged, wherein the third contact area (148) and the fourth contact area (150) are designed such that they are engaged when the first element (110) and second element (112) are connected. Adapter arrangement after Claim 3 , characterized in that the third contact area (148) and the fourth contact area (150) are designed such that when the first element (110) and the second element (112) are connected they engage in such a way that when a force is applied transversely to the Longitudinal axis (L) of the linkage (14) a force is transmitted transversely to the longitudinal axis (L) between the third contact area (148) and the fourth contact area (150). Adapter arrangement according to one of the preceding claims, characterized in that the first contact area (136) and the second contact area (138) form a fit, in particular a press fit, clearance fit or transition fit, and / or that the third contact area (148) and the fourth contact area (150) form a fit, in particular a press fit, clearance fit or transition fit. Adapter arrangement according to one of the preceding claims, characterized in that the diameter of the first contact area (136) is smaller by a value in the range from 6/100 mm to 8/100 mm than the diameter of the second contact area (138) and / or that The diameter of the third contact area (148) is smaller by a value in the range from 6/100 mm to 8/100 mm than the diameter of the fourth contact area (150). Adapter arrangement according to one of the preceding claims, characterized in that the sealing element (144, 146) is inserted into the circumferential groove (140, 142) such that a part of the sealing element (144, 146) circumferentially out of the groove (140, 142) protrudes. Adapter arrangement according to one of the preceding claims, characterized in that the sealing element (144, 146) is elastically deformable. Adapter arrangement according to one of the preceding claims, characterized in that the first contact region (136) has at least one second circumferential groove (142) into which a second sealing element (146) is inserted. Adapter arrangement according to one of the preceding claims, characterized in that the first element (110) and the second element (112) each have an external polygon or external multi-tooth, preferably an external hexagon, in the region (116, 118) with a non-circular cross section, and in that the third Element (114) has an opening (120) which is complementary to the regions (116, 118) with a non-circular cross-section of the first element (110) and the second element (112) and is in particular designed as an internal polygon or internal multi-tooth, preferably as an internal hexagon. Adapter arrangement according to one of the preceding claims, characterized in that the third element (114) is designed as a sliding sleeve and in the connected state preferably with at least one locking screw (124, 126) and / or at least one locking pin (170, 172), in particular at least one Dowel pin or heavy dowel pin can be connected to the first and / or second element (110, 112), the locking pin engaging in an opening, preferably in a circumferential groove (174), in the first element (110) or in the second element (112) . Adapter arrangement according to one of the preceding claims, characterized in that both the internal thread (134) and the external thread (132) are tapered threads, in particular NPT threads (National Pipe Thread), Whitworth threads or metric tapered threads. Adapter arrangement according to one of the preceding claims, characterized in that a check valve (190) is arranged in the through opening (156, 158) of the first element (110) or of the second element (112), the fluid (46) only from the drill pipe (14 ) to the drilling tool (20, 24, 180). Adapter arrangement after Claim 13 , characterized in that the check valve (190) comprises a closing element (194), an elastically deformable element (196) and a sealing cone (193), the elastically deformable element (196) closing element (194) in the closed state of the check valve ( 190) presses against the sealing cone (193) and / or the elastically deformable element is arranged and designed in such a way that the closing element (194) in the opened state of the check valve (190) by a fluid flow (46) flowing through the check valve (190). can be pressed against a second cone (199). Adapter arrangement after Claim 14 , characterized in that the closing element is a ball (194) and the elastically deformable element is a spring (196) or an elastomer block.

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