JP5932942B2 - Separation assembly and method of forming a drilling tool - Google Patents

Description

  The present invention relates to a drilling tool separation assembly for use in excavating rock and topsoil. The separating assembly is arranged axially between the two drilling tool components. The drilling tool components can be connected to each other at the joint by means of connecting threads.

  The invention further relates to the use of a separating assembly and a method of forming a drilling tool for drilling rock or topsoil.

  The field of the invention is more specifically defined in the preamble of the independent claims.

  In mines and other work sites, drilling machines are used to drill drill holes in rock surfaces and soil. The excavating machine includes a rotating device for rotating the excavating tool during excavation. In many drilling applications, the drilling machine also includes a vibration device for generating shock pulses on the tool. The drilling tool consists of several drilling tool components, which are continuously arranged in the axial direction and connected to each other by connecting threads. It has proven difficult to open the coupling threads between the drilling components after the drilling procedure. The connecting threads tend to stick together and become stuck. Sticking joints result in a loss of time and money.

  It is an object of the present invention to provide a new and improved apparatus for separating coupling threads between drilling components. A further object is to provide a new and improved method of forming a drilling tool.

  The separating assembly according to the present invention has a joint thread of the joint having a first orientation; and both the first and second opposing surfaces have a first orientation of the coupling thread. Comprises at least one inclined flank surface having an opposite second orientation so that the separating assembly is rotated relative to each other in the tightening direction of the first orientation. The first opposed surface and the second opposed surface are arranged so as to be long and are arranged so as to be short when rotated in the opening direction of the first direction.

  The method according to the invention is characterized in that the separating assembly according to claim 1 is arranged between successive drilling tool components.

  The intent of the disclosed solution is that the drilling tool comprises at least one separating assembly. The separating assembly is disposed at a joint between two successive axial drilling tool components. The separating assembly has a predetermined axial length. The separating assembly includes a separating mechanism that allows the axial length of the separating assembly to be reduced when the joint is opened.

  Furthermore, the connecting thread and the facing surface of the separating assembly are opposite in their opening direction and tightening direction. The coupling screw of the joint has a first orientation. Both the first facing surface and the second facing surface comprise at least one inclined flank surface having a second orientation opposite to the first orientation of the coupling thread. Therefore, the separating assembly is arranged such that the first facing surface and the second facing surface become longer when they are rotated relative to each other in the tightening direction of the first direction, and the first facing surface and the second facing surface are When it is rotated in the opening direction of the first direction, it is arranged so as to be shortened. In other words, if the coupling thread is right-handed, the flank surface is left-handed and vice versa.

  An advantage of the disclosed solution is that the separating assembly facilitates the release of the coupling thread between successive drilling tool components. When the separation mechanism is shortened in response to rotation in the opening direction, the frictional force is reduced and opening is facilitated. In addition, the inclined flank surfaces are easy to manufacture and they are well resistant to forces and wear.

  According to one embodiment, the separating assembly includes at least one first intermediate component and at least one second intermediate component. Both intermediate components include opposing surfaces facing each other and a contact surface facing the excavation component of the joint. With this embodiment, the separating assembly becomes a separate and independent part that can be placed between the connectable drilling tools without any changes to the basic design of the drilling tool components.

  According to one embodiment, the separating assembly includes only one intermediate component. In this case, the intermediate component includes a first facing surface and a contact surface. Furthermore, one of the excavation components to which the joint can be coupled includes a second facing surface. In this case, the second facing surface is an integral part of the excavating tool component. This embodiment is useful, for example, when it is necessary to minimize the number of components or the axial length of the separating assembly.

  According to one embodiment, the coupling thread and the inclined flank surface of the opposing surface are opposite in terms of the opening direction and the tightening direction. The coupling thread has a first pitch angle, and the inclined flank surface has a second pitch angle. The second pitch angle is larger than the first pitch angle. With this embodiment, even a fairly small rotational movement in the opening direction can reduce the clamping force of the flank surface and cause the required axial shortening. However, the second pitch angle should be less than 5 times the first pitch angle. In this way, the separation assembly can be prevented from opening inadvertently under the influence of dynamic forces during use of the drilling tool.

  According to one embodiment, the second pitch angle of the inclined flank surface is 2 to 3 times the first pitch angle of the coupling thread. This embodiment has been found to be available when actually tested.

  According to one embodiment, the second pitch angle of the inclined flank surface is smaller than the first pitch angle of the coupling thread. This embodiment is therefore the opposite of that described in the previous two paragraphs above. This embodiment can be used in situations where inadvertent opening of the separating assembly is a problem.

  According to one embodiment, the first opposing surface comprises one or more first lateral surfaces and the second opposing surface comprises one or more second lateral surfaces. ing. The transverse plane is transverse to the inclined flank plane. The transverse plane may be formed in the axial direction, perpendicular to the flank plane, or in the desired angular direction. The first lateral surface faces the second lateral surface, and one or more flexible members are disposed between the first lateral surface and the second lateral surface. Yes. The flexible member occupies the spacing between the lateral surfaces. The flexible member prevents the lateral surfaces from contacting each other. In other words, the flexible member allows the opposing elements or opposing surfaces to rotate with respect to each other in the opening direction.

  According to one embodiment, the flexible member described above is formed from one or more resilient materials, such as rubber or elastic polymers. When the separating assembly is rotated in the open direction, the resilient material can be temporarily compressed or reshaped.

  According to one embodiment, the flexible member described above is a separate element, which is mounted between the lateral surfaces facing each other. Separately manufactured flexible members are easy to place between the lateral surfaces and can be replaced later if necessary. In its simplest implementation, the separate flexible member may be a piece of rubber.

  According to one embodiment, one or both of the opposing lateral surfaces are coated with a resilient material that serves as a flexible member. There may be a space filled with the resilient material between the lateral surfaces. Alternatively, the lateral surface may be coated with a resilient material. The resilient material may be a rubber or rubber-like material. Any polymer, such as polyurethane PU, is also suitable for this purpose. In this embodiment, the flexible material is pre-positioned or integrated into the separation assembly, thus allowing easy and quick attachment of the separation assembly.

  According to one embodiment, the lateral surfaces are held at a predetermined distance from one another by one or more spring members. As the separating assembly is rotated in the opening direction, the spring member compresses, allowing the separating assembly to be shortened in the axial direction. In some situations, it may be more convenient to use a spring member as the flexible member instead of the above-described resilient material.

  According to one embodiment, the contact surface of the intermediate component comprises one or more friction zones with an intentionally increased coefficient of friction. The friction zone may be intentionally increased in surface roughness. The friction zone may include notches, for example. Alternatively, the friction zone may be coated with a friction material having a higher coefficient of friction compared to the base material of the intermediate component. The contact surface may have one or several smaller friction zones and one or more additional zones whose features are not disclosed, or the entire contact surface is frictional against the entire area Processed to increase the coefficient. The friction zone is intended to prevent inadvertent opening of the coupling thread by increasing the frictional force between the intermediate component and the connectable drilling tool component.

  According to one embodiment, the contact surface of the intermediate component has a tapered shape. The tapered shape can increase the contact area between the intermediate component and the connectable excavation tool component. The intermediate component may include a tapered contact surface on the outer periphery or the inner periphery of the intermediate component.

  According to one embodiment, the intermediate component has an outer periphery and an inner periphery, both of which include one or more curved surfaces. Both the outer periphery and the inner periphery may have a closed configuration.

  According to one embodiment, the intermediate component has an annular form, thereby having an outer periphery and an inner periphery. The intermediate component may have a circular or elliptical shape, for example.

  According to one embodiment, the intermediate component is formed from two or more separate pieces. The intermediate component can be, for example, a sleeve-like piece formed from two halves.

  According to one embodiment, the opposing surfaces of the intermediate component are formed from two or more separate pieces. The intermediate piece may comprise several opposing pieces attached to the recesses of the opposing surface.

  According to one embodiment, the separation assembly is adapted for use in down-the-hole drilling (DTH). In this case, the separating assembly is disposed between the drill bit assembly and the down-the-hole vibration device. The drill bit assembly includes a drill bit and a clamping member for clamping the drill bit. Down-the-hole vibrators are also known as DTH hammers.

  According to one embodiment, the separation assembly is used in DTH drilling. The separating assembly is disposed between the lock nut of the drill bit assembly and the DTH hammer. Lock nuts are also known as driver subs.

  According to one embodiment, the separation assembly is adapted for use in extension drilling. In this case, the separating assembly is arranged between two successive drilling tool components. The drilling tool component can be, for example, a drill bit, a drill rod, or a drill pipe.

  According to one embodiment, the separation assembly is adapted for use in rotary excavation. In this case, the separating assembly is arranged between the rotating unit and the drill bit. Between the rotating unit and the drill bit, one or more drill tubes or drill rods with coupling threads may be located.

  According to one embodiment, the separating assembly is adapted for use in top hammer drilling. In this case, the separating assembly is arranged between the drilling machine and the drill bit. The drilling machine and the drill bit are arranged at opposite ends of the drilling facility. Between the drilling machine and the drill bit, one or more drill tubes or drill rods with coupling threads may be located.

  According to one embodiment, the separating assembly does not have any connecting threads. Instead, the two drilling tool components are provided with the required coupling threads for coupling them in the joint. Thus, the surface of the separating assembly applied to the connectable drilling tool component does not have a connecting thread. The separating assembly may be an intermediate piece disposed between two connectable drilling tool components without being clamped to the drilling tool component by connecting threads.

  The embodiments disclosed above can be combined to form a suitable solution with the required features disclosed.

  Several embodiments are described in detail in the accompanying drawings.

FIG. 1 is a side view showing a rock excavation rig provided with an excavation unit. FIG. 2 is a schematic diagram illustrating the principle of DTH excavation. FIG. 3 is a side view that schematically shows a partial cross-section of a separating assembly disposed between two successive drilling tool components. FIG. 4 is a schematic side view showing the separation assembly rotated in the opening direction. FIG. 5 is a schematic side view of a separating assembly in which a spring serves as a flexible member. FIG. 6 is a schematic side view of a separating assembly in which a flexible filler material, a moldable filler material, or a resilient filler material serves as a flexible member. FIG. 7a is a schematic diagram showing in axial direction an intermediate component comprising several sections, each section having an inclined flank surface and a lateral surface on opposite surfaces. FIG. 7b is a schematic diagram showing an intermediate component in the axial direction, which includes several sections, each section having an inclined flank surface and a lateral surface on opposite surfaces. FIG. 7c is a schematic diagram showing an intermediate component in the axial direction that includes several sections, each section having an inclined flank surface and a lateral surface on opposite surfaces. FIG. 8a is a schematic diagram showing the contact surface of an intermediate component with one or more friction zones. FIG. 8b is a schematic diagram showing the contact surface of the intermediate component with one or more friction zones. FIG. 9 is a schematic side view of a separation assembly including two intermediate components, the separation assembly disposed in a shoulder contact configuration within a joint between two drill rods. FIG. 10 is a schematic side view of a separation assembly that includes only one intermediate component and is disposed in a shoulder contact configuration within a joint between two drill rods. FIG. 11 is a schematic side view showing a separating assembly disposed within a connecting sleeve of a joint between two drill rods and having a bottom contact configuration. FIG. 12 is a schematic side view showing a drill bit assembly of a DTH drilling device. FIG. 13 is a partial cross-sectional side view schematically illustrating a joint between a DTH hammer and a drill bit assembly, wherein the separating assembly has a shoulder contact configuration. FIG. 14 is a partial cross-sectional side view schematically illustrating another joint between a DTH hammer and a drill bit assembly, wherein the separating assembly has a bottom contact configuration. FIG. 15 schematically illustrates another joint between a DTH hammer and a drill bit assembly, wherein the separating assembly has an intermediate component with a tapered contact surface facing the drilling tool component. It is the side view which carried out the partial cross section shown.

  For the sake of clarity, the drawings show in simple form some embodiments of the disclosed solution. In the figure, like symbols designate like elements.

  FIG. 1 shows a rock drilling rig 1 including a rock drilling unit 2. The rock excavation unit 2 may be coupled to the movable carrier 4 by a boom 3. The excavation unit 2 may include a feed beam 5 and a rock excavation machine 6 supported on the feed beam. The rock excavation machine 6 can be moved on the feed beam 5 by a feed device 7. The rock excavation machine 6 includes a shank 8 at the front end of the rock excavation machine 6 for coupling the tool 9. The tool 9 may include one or more drill rods 10 and a drill bit 11 disposed at the distal end of the tool 9. The rock excavating machine 6 further includes a rotating device 12 for rotating the shank 8 and the tool 9 coupled to the shank 8. If the rock excavation is performed based on the rotation R and feed F of the tool, the excavation is called rotary excavation. However, the rock excavation machine 6 may include an impact device or vibration device 13 for generating impact pulses to the tool 9. If the rock excavating machine 6 is equipped with a vibration device 13 and the vibration device 13 is arranged at the end of the tool 9 opposite to the drill bit 11, the excavation is called top hammer excavation.

  Tool 9, tool drill rod 10, and drill bit 11 are drilling tool components 14. The excavation tool components are arranged continuously in the axial direction. Between successive drilling tool components 14 is a joint 15 for interconnecting the components. The joint 15 may include a coupling thread. The coupling thread allows the attachment and removal of the joint by screwing the excavation tool components 14 together around the centerline of the tool 9. Furthermore, the front end of the tool 9 can be coupled to the shank 8 by a joint 15 including coupling threads. The coupling threads of the joint 15 may stick together and become stuck. For this purpose, the joint 15 may comprise the separating assembly described in this application.

  At the excavation site, one or more drill holes 16 are excavated using the excavation unit 2. The drill hole 16 can be drilled in the vertical direction as shown in FIG. 1, or in the horizontal or angled direction. The drill hole 16 may be drilled into rock or soil.

  FIG. 2 shows a drilling unit 2 for DTH drilling. The excavation unit 2 is different from that of FIG. 1 in that the vibration device 41 is located at the end of the tool 9 opposite to the rotation device 12 or the rotation unit. During drilling, the vibration device 41 is in the drill hole 16 and the drill bit 11 may be directly coupled to the vibration device 41. The drill bit 11 or drill bit assembly may be coupled to the vibration device 13 by a lock nut 37, also known as a driver sub. As shown in FIG. 2, the tool 9 may include one or more rods 10 or tubes, which may be connected continuously by a joint 15 with connecting threads. Furthermore, the rear end of the tool 9 may be coupled to the shank 8 by a joint 15 that also includes coupling threads. A joint 15 having a coupling thread is also provided between the lock nut 37 and the front end portion of the vibration device 41. The coupling threads of the joint 15 may stick together and become stuck. For this purpose, the joint 15 may comprise the separating assembly described in this application. The tool, extension drill tube, drill bit assembly, and oscillating piston are all drilling tool components 14, which are arranged axially one after the other and used during drilling. Between successive drilling tool components 14, a joint 15 is provided for joining the components together.

  FIG. 3 discloses the separating assembly 18 in a simple form. In this embodiment, the separating assembly 18 is disposed in a joint 15 between two successive axial drilling tool components 14a and 14b. These components are, in this particular example, a drill bit 10 with a drill tube 10 and a clamping part 19. The outer surface of the clamping part 19 is provided with a connecting male thread 20, and the drill tube 10 is provided with a connecting female thread 21. The coupling threads 20 and 21 are screwed together and have a first pitch angle P1. The separating assembly 18 may include a first intermediate component 22a and a second intermediate component 22b. These intermediate components are separate from the drilling tool components 14a, 14b. The intermediate components 22 a, 22 b have a contact surface 24 that faces the excavation tool component 14. The intermediate components 22a, 22b include opposing elements that face each other. These opposing elements include a separating mechanism 25 that allows the initial axial length L1 to be shortened in response to rotating the coupling threads 20, 21 of the joint 15 in the opening direction Ro. The shortened axial length L2 after execution of the separation mechanism 25 is also shown in FIG. The tightening direction Rc is also shown in this figure.

  In the disclosed embodiment of FIG. 3, the opposing elements of the separation mechanism 25 are a first opposing surface 26 and a second opposing surface 27 that face each other. Both the first facing surface 26 and the second facing surface 27 include one or more inclined flank surfaces. The coupling threads 20 and 21 have a first orientation, and the inclined flank surfaces of the opposing surfaces 26 and 27 have a second orientation. If the coupling thread is right-handed, the inclined flank surface is left-handed and vice versa. The inclined flank surfaces of the opposing surfaces 26 and 27 have a second pitch angle P2. The second pitch angle is larger than the first pitch angle P1 of the coupling threads 20 and 21, as clearly shown in FIG.

  The first opposing surface 26 may include a first lateral surface 28 and the second opposing surface 27 may include a second lateral surface 29. These lateral surfaces face each other. The lateral surfaces 28 and 29 form a space 30 in which the flexible member 31 is disposed. The flexible member 31 occupies a distance D1 between the lateral surfaces 28,29.

  When the first facing surface 26 and the second facing surface 27 are rotated relative to each other in the tightening direction Rc, the axial length of the separating assembly 18 becomes longer. In this case, the separating assembly 18 has an initial length L1. When the joint 15 is opened and the first facing surface 26 is rotated in the opening direction Ro with respect to the second facing surface 27, the axial length of the separating assembly 18 is shortened. In this case, the separating assembly 18 has a second axial length L2, so that the frictional force is reduced in the joint 15 and the joint 15 can be easily opened. The flexible member 31 allows the intermediate components 22a, 22b to move relative to each other in the opening direction Ro. The flexible member 31 may be a separate piece disposed in the space 30. The flexible member may be a rubber piece, for example.

  More specifically, the intermediate components 22a, 22b may be sleeve-like pieces having an outer diameter 32 and an inner diameter 33. However, other shapes and forms are possible. Additional embodiments may include only one intermediate component 22a or 22b. This is because one of the drilling tool components 14a or 14b may have an integral opposing surface 26 or 27.

  In FIG. 4, the separating assembly 18 is rotated in the opening direction Ro, whereby the lateral surfaces 28 and 29 are moved relative to each other and the spacing D2 of the space 31 occupied by the flexible member 30 is increased. Decrease. The flexible member 31 changes its shape or is compressed depending on the structure and material used. In this embodiment, the flexible member 31 is flattened to allow relative movement of the intermediate components 22a, 22b and shortening Ls of the separation assembly 18 length. The initial position of the first lateral surface 28 is indicated by a dotted line.

  In FIG. 5, the flexible member 31 of the separating assembly 18 is a spring disposed in the space 30. The spring may be a spiral spring, for example.

  In FIG. 6, the flexible member 31 is a flexible material disposed in the space 30 by casting, injection molding, or otherwise. The flexible material filling the space 30 may be polyurethane, for example. The flexible material coalesces the lateral surfaces 28, 29, thereby joining the intermediate components 22a, 22b to form one unitary object. FIG. 6 further differs from the solution disclosed in FIGS. 3-5 in that the orientation of the inclined flank surfaces of the opposing surfaces 26, 27 is reversed. The direction of the inclined flank surface can be designed according to the direction of the coupling thread. The direction of the thread is only an example in the drawings of the present application. The thread orientation of the separating assembly 18 does not affect the other features shown in the figures.

  FIG. 7 a shows that the intermediate component 22 can include several inclined flank surfaces and lateral surfaces 29 in the opposing surface 27. In the solution shown in FIG. 7a, the facing surface 27 is divided into four sections, but the number of sections may be two or three, or five or more.

  In FIG. 7b, the intermediate component 22 is formed from two halves 23a and 23b. It is also possible to form an intermediate component consisting of three or more pieces. FIG. 7b further illustrates that the lateral surface 29 can be coated with a flexible material, which allows the flexible member 31 to be integrated with the intermediate component.

  FIG. 7c further shows that the intermediate component 22 may have a different shape than the basic sleeve. The intermediate component 23 has a slot 32, so that the outer periphery is not closed. On the other hand, the outer surface of the separating assembly 18 need not be circular, and may have any suitable shape.

  FIGS. 8 a and 8 b show that the contact surface 24 of the intermediate component 22 may include one or more friction zones 33. All of these friction zones 33 have a high coefficient of friction compared to the coefficient of friction of the base material of the intermediate component. The friction zone 33 may include notches or other surface treatments, or may include a coating.

  FIG. 9 shows a separating assembly 18 disposed in the joint 15 between the two drill rods or tubes of the extension drilling tool. The first drilling tool component 14a may have a shoulder 34 against which the separating assembly 18 is applied.

  FIG. 10 shows another embodiment of the solution of FIG. The separating assembly 18 includes only one intermediate component 22b. This is because the first facing surface 26 and the first lateral surface 28 are integrated with the end surface of the first excavation tool component 14a.

  FIG. 11 shows the joint 15 in which the second excavation tool component 22 b includes a coupling sleeve 35. Separating assembly 18 may be located at the bottom of coupling sleeve 35.

  9-11 relate to the top hammer means. In this case, the connecting thread is typically left-handed. Therefore, the inclined surface of the separating assembly 18 is right-handed.

  FIG. 12 discloses a drilling tool assembly 36 that includes a drill bit 11 and a lock nut 37. The drill bit 11 may include a clamping part 19. A tightening portion 38 of the lock nut 37 may be disposed around the tightening portion. The clamping part 38 is provided with a coupling thread 20. The lock nut 37 may further include a grip portion 39. At the distal end of the clamping part 19 of the drill bit 11 is an impact surface 40 for receiving impact pulses. The clamping part 19 can slide axially relative to the lock nut 37 during operation of the vibration device 41.

  FIG. 13 illustrates that the separation assembly 18 may be disposed between the down-the-hole vibration device 41 and the excavation tool assembly 36. The DTH vibration device 41 includes a vibration piston 42 arranged to strike the impact surface 40 of the excavation tool assembly 36. The coupling thread 20 of the excavation tool assembly 36 is coupled to a coupling thread provided on the inner surface of the vibration device 41. Separating assembly 18 allows easy opening of the coupling thread in accordance with the above principles in this application.

  In FIG. 14, the separating assembly 18 is located at a different position from the solution of FIG. The separating assembly 18 is located in the vibration device 41 between the holding element 43 and the end face 44 of the tightening portion 38 of the lock nut 37. In FIG. 14, the separating assembly 18 has a bottom contact configuration with the excavation tool components 14a, 14b of the joint 15, whereas in FIG. 13, a shoulder contact configuration is applied.

  13 and 14, the second intermediate component 22 b of the separating assembly 18 may be an integral part of the lock nut 37. In this case, the upper surface of the grip portion 39 may include elements required to act as a part of the separation mechanism.

  FIG. 15 shows a joint 15 having almost the same shape as that shown in the solution of FIG. However, in FIG. 15, the second intermediate component 22 b of the separating assembly 18 has a tapered contact surface 24 t that abuts against the grip 39 of the lock nut 37. Alternatively or additionally, the contact surface 24 of the first intermediate component 22a may have a tapered shape. In this case, of course, the drilling tool components 14a, 14b facing the separating assembly also need to be tapered. Furthermore, it is also conceivable to apply the disclosed tapered contact surface to the solution of at least FIGS.

  12-15 relate to DTH hammer means. In this case, the coupling thread is typically right-handed. Therefore, the inclined surface of the separating assembly 18 is left-handed.

  The drawings and the associated description are only intended to illustrate the idea of the invention. The details of the invention may vary within the scope of the claims.

Claims (14)

An assembly for excavating tools for excavating rock and topsoil,
Said separating assembly (18) is arranged axially between two drilling tool components (14) which can be connected to each other at joint (15) by means of connecting threads (20, 21). ;
Said separating assembly (18) comprises a first opposing element and a second opposing element;
The first opposing element and the second opposing element are a first opposing surface (26 ) and a second opposing surface (27) facing each other;
At least one of the first and second opposing elements is disposed in an intermediate component (22) separate from the drilling tool component (14);
The intermediate component (22) has a contact surface (24) facing the excavation tool component (14); and a separation mechanism between the first and second opposing elements The separation mechanism has an axial length (L1) of the separation assembly (18) that causes the coupling thread (20, 21) of the joint (15) to open in the opening direction (Ro). It is a format that allows (L2) to be shortened in response to rotation,
here,
The coupling thread (20, 21) of the joint (15) has a first orientation; and both the first opposing surface (26) and the second opposing surface (27) At least one inclined flank surface having a second orientation opposite to the first orientation of the coupling threads (20, 21), whereby the separating assembly (18) is provided with the first facing surface; (26) and the second facing surface (27) are arranged so as to become longer when they are rotated in the tightening direction (Rc) in the first direction, and the first facing surface (26) and the second facing surface (27) Separation assembly, characterized in that the second facing surface (27) is arranged to be shorter (Ls) when rotated in the opening direction (Ro) of the first orientation. The separating assembly (18) includes at least one first intermediate component (22a) and at least one second intermediate component (22b), both of which face each other first opposing surface (26). And a second opposing surface (27) , both of which comprise a contact surface (24) facing the drilling tool component (14) of the joint (15). The separation assembly as described. Said separating assembly (18) comprises only one intermediate component (22);
The intermediate component (22a or 22b) comprises the first opposing surface (26 ) or the second opposing surface (27) and a contact surface (24); and the jointable of the joint (15) drilling tool component (14a or 14b) while said first opposing surface (26) or the second opposing face has a (2 7), whereby said first opposing surface (26) or the second opposing 2. Separating assembly according to claim 1, characterized in that the face (27) is an integral part of the drilling tool component (14a or 14b). The coupling thread (20, 21) has a first pitch angle (P1);
The inclined flank surface has a second pitch angle (P2); and the second pitch angle (P2) is larger than the first pitch angle (P1). The separation assembly according to any one of the preceding claims. The first opposing surface (26) comprises at least one first lateral surface (28) and the second opposing surface (27) comprises at least one second lateral surface (29). The first lateral surface (28) and the second lateral surface (29) are transverse to the inclined flank surface;
Said at least one first lateral surface (28) faces said at least one second lateral surface (29); and
At least one flexible member (31) is located between the at least one first lateral surface (28) and the at least one second lateral surface (29), the lateral surface. Occupies the interval (D1) between (28, 29),
5. Separation assembly according to any one of the preceding claims, characterized in that   Separation assembly according to claim 5, characterized in that at least one separate resilient element serves as the flexible member (31).   Separation assembly according to claim 5, characterized in that at least one of the lateral faces (28, 29) is coated with a resilient material, the resilient material serving as a flexible member (31). .   At least one contact surface (24) comprises at least one friction zone (33) with an intentionally increased surface roughness or friction compared to the base material of said intermediate component (22) 8. Separation assembly according to any one of claims 1 to 7, characterized in that it is coated with a material having a high modulus.   9. Separation assembly according to any one of the preceding claims, characterized in that at least one contact surface (24t) is tapered. Use of the separating assembly according to any one of claims 1 to 9,
The separating assembly (18) is disposed between a drill bit assembly (36) and a down-the-hole vibration device (41), and the drill bit assembly (36) includes a drill bit (11) and the drill. Use of a separating assembly, characterized in that it comprises a fastening member (37, 38, 49, 43) for fastening the bit (11).   Use according to claim 10, characterized in that a separating assembly (18) is arranged between the lock nut (37) of the drill bit assembly (36) and the down-the-hole vibration device (41). Use of a separating assembly according to any one of claims 1-9,
Use of a separating assembly, characterized in that the separating assembly (18) is used during extension drilling, the separating assembly (18) being arranged between two successive drilling tool components (14). Use of a separating assembly according to any one of claims 1-9,
For separation, characterized in that the separation assembly (18) is used during rotary excavation, the separation assembly (18) being arranged between the rotary excavation component (12) and the drill bit (11) Use of assemblies. A method of forming a drilling tool for drilling rock and topsoil, the method comprising:
Coupling and separating at least two drilling tool components (14) from each other by means of a threaded joint (15) comprising coupling threads (20, 21);
Rotating the drilling tool components (14) relative to each other during coupling and separation;
Ensuring the opening of the threaded joint (15) by placing a separating assembly in the joint (15) between the successive drilling tool components (14); and opening the threaded joint (15) in the opening direction (Ro) and at the same time the axial length (L1) of the separating assembly (18) can be reduced, thereby reducing the friction force in the threaded joint (15). In the form of including
The separation assembly according to claim 1 is arranged between the successive drilling tool components.
How to form a drilling tool.

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