TWI591251B - A device for use in drilling and securing a borehole for advance rock stabilisation - Google Patents

Description

Equipment for drilling and fastening a well for use in pre-rock stabilization

The present invention relates to a process for setting up a wellbore for a combined wellbore and maintaining a set of pipe plugs or tubular anchors in the resulting wellbore for pre-rock stabilization (eg, in tunneling) device.

When producing a wellbore (especially in a loose area of rock) and subsequently fastening the anchor in the wellbore, it is known from WO 98/21439 and WO 98/58132 to practice, for example, by impact drilling or spinning The impact drill machine creates a wellbore while introducing the drill pipe into the wellbore: after completion of the wellbore, the portion of the drill bit can be removed from the wellbore together with the drill pipe while the drill pipe itself remains in the wellbore. A hardenable material, such as a mortar or multi-component adhesive, is then introduced into the drill pipe such that the drill pipe, together with the hardenable material, can act as an anchor in the wellbore.

From EP 1 381 756 B2, it is known to practice the use of a drill pipe having a continuous or at least a plurality of continuous longitudinal grooves, and the drill pipe is introduced by pretensioning so that the drilling operation is terminated and the drill pipe After removal (while leaving the drill bit in the wellbore), the drill pipe produces some stabilization of the rock as a result of the expansion. In this case, the drill pipe and the tip of the drill bit or the drill pipe are connected to each other in the following manner: the drill pipe can also be pulled into the well hole during the drilling operation. Due to the longitudinal grooves, the drill cuttings released during the generation of the wellbore are initially not discharged from the wellbore at a point in a predetermined manner, with the result that they can collect and remove it only with difficulty. In most unfavorable situations, it becomes clogged around the drill pipe in the area of the jacket so that it cannot be introduced later in this area. Into mortar or cemented material. For this reason, this "expansion anchor" is generally not used with a connecting sleeve that performs many functions. Furthermore, in the case of a plug which is closed on all sides, if the groove between the connecting sleeve and the plug is temporarily left during the impact drilling, the chips can escape only during the drilling. To this end, the system only works with a slotted plug. Finally, the deliberate disassembly of the drill bit after the end of the drilling operation is difficult or impossible, since the drill bit has become too tightly fixed to the corresponding end of the drill cone. Finally, when a wellbore is created, it is also difficult to knock into the drill pipe.

A potential goal of the present invention is therefore to make the operation of the combined drilling and setting process by using a plug that is held in the wellbore more efficient, more reliable, and more economical.

According to the invention, this object is achieved by the fact that the connecting sleeve is constructed as a combined propulsion, impact and ejection adapter having an annular space at the well end that is connected to the plug on all sides The closed tube has a radial transverse bore through its wall for the portion thereof, and the connecting sleeve is also constructed to have a push and impact surface for the plug at its forward end. In particular, in accordance with the present invention, an apparatus for drilling and fastening a well for use in a pre-rock stabilization process is provided, wherein the apparatus includes: a drill rod carrying a preferably detachable cartridge a drill bit having a continuous tube for receiving the drill pipe, and a connecting sleeve for connecting the drill pipe to a hammer drill; wherein the connecting sleeve is a combination having a wall Propulsion, impact and bomb An adapter is formed at its well end to define an annular space around the drill rod, the annular space being coupled to the tube, wherein the annular space has one or more radial transverse holes therethrough.

First, this type of connecting sleeve first ensures that the chips that occur when the wellbore is created are removed in a reliable and predetermined manner and that the drilling device is at a point where it does not cause any problems or can proceed forward in a predetermined manner. In addition, the connecting sleeve or corresponding adapter has a propulsion and impact surface through which the plug can be driven into the wellbore smoothly and in a manner beneficial for advancement in the drilling operation. Finally, the connecting sleeve has a suitable face in a manner known per se, and the impact from the rotary hammer drill is smoothly transmitted to the drill pipe via the faces, so that the smoothing of the well hole by the rotation of the drill pipe and the drill bit can be ensured. Drill out. At the same time, the connecting sleeve or the adapter is equipped with a guiding surface which ensures that the plug which can also be described as a "drill pipe" (although there is no such longitudinal slot) is introduced axially parallel to the drill pipe Inside the well. This is possible because the plug is "driven" by the connecting sleeve. To enable this, the connecting sleeve can be configured such that the plug can be properly pushed deep into or onto the connecting sleeve.

According to an advantageous configuration of the invention, a connecting sleeve constructed to have a guide rod for the plug can be provided. In one embodiment, the plug can be pushed into a suitable point within the connecting sleeve where there is a shoulder or baffle that is transmitted from the connecting sleeve to the plug via the shoulder or baffle. However, the invention is further intended to provide a predetermined guide for the plug on or in the connecting sleeve. The guidance of the plug (and in particular the precise guidance) in either case is therefore possible.

In an embodiment of the invention, the connecting sleeve can have a cylindrical or combined cylindrical/conical guide on the outside which permits sufficient free axial movement (specifically, the plug is in the connecting sleeve on). One end of the connecting sleeve or sleeve can thus be constructed so as to be able to be introduced into or onto the plug; the length of the sleeve that engages the plug is preselected according to practicality, such as the manner in which the apparatus according to the invention is to be used. . The advantage of matching the (well) end of the connecting sleeve on the one hand and the receiving end of the plug on the other hand is that the impact is transmitted in a precise manner and the plug is guided in a predetermined manner when the well is produced.

Further optimization is possible according to the invention, since the connecting sleeve can have a cylindrical or combined cylindrical/conical guide on the inside. One advantage of this configuration is that a sufficiently free axial movement is possible, the cylindrical/conical guide rod working in a reliable manner due to the engagement of the connecting sleeve with the plug.

It has been explained that there is an annular space in the connecting sleeve which has the advantage that it allows the chips in the region of the connecting sleeve to be discharged via the transverse holes. In use, an annular conduit can be formed between the drill pipe and the plug. According to the invention, the plug is closed because it lacks a longitudinal groove and preferably lacks any holes from which the chip can exit. As a result, the chips (specifically, all of them) can be guided as far as the connecting sleeve; again, the space between the plug and the wall of the well remains largely free of chips, so that later A cementitious material, a mortar or a two-component adhesive can be reliably introduced. In order to improve all of this, through the drilling operation, the present invention provides an annular space in the connecting sleeve that is to be designed to form an extension of the annular conduit present between the inner wall of the plug and the outer wall of the drill pipe Section, cross section and / or size geometry of the annular duct Similar, identical or substantially identical, for example, substantially the same in size. Thereby, the possibility of reflow is reduced and, more definitely, impossible. The problem with backflow is that it has the risk of the chips drying out, becoming clogged in the annular duct and then causing obstacles. Therefore, one of the advantages of the present invention is to ensure smooth removal of the chips. A further advantageous aspect in this regard is the fact that the flushing water or flushing fluid is forced to the deepest point of the wellbore via the inner conduit in the drill pipe for subsequent flow into the annular conduit in a predetermined manner, and then flows out to the connection via the latter Inside the casing.

According to the foregoing description, the chips are guided out of the annular conduit and into the annular space and from within to the transverse bore. In view of this flow direction, in one embodiment of the invention, transverse holes may be provided in the walls of the casing that are to be constructed as elongated holes. These elongated holes then ensure that the incoming mixture of water and chips can "flow out" the connecting sleeve without causing hazards and/or obstructions.

In the case of a larger borehole depth, according to a further embodiment of the invention, it may be advantageous to associate the inner wall of the plug and/or the outer wall of the drill rod with the guiding element or with a guiding element, preferably At some or individual points, a sufficiently large residual cross-section is left between the guiding elements to form an annular conduit. Optionally, if a particularly long well length is required, the guiding elements can be placed over the length of the drill pipe or pipe plug. Otherwise, it is usually sufficient to provide a ring of individual guiding elements at or near the end of the drill pipe and/or pipe plug in the direction of the deepest point of the wellbore. In such cases, it is ensured in accordance with the teachings of the present invention that backflow of the mixture of chips and water does not occur in this case, as it has been stated that in either case a sufficiently large residual cross section must be left.

According to another embodiment of the invention, a plurality of additional guiding elements may be provided in the form of longitudinal ribs and axial longitudinal grooves, the longitudinal ribs being configured with the axial longitudinal grooves to In particular, they are distributed at a distance from each other across the cross section of the catheter. This can occur in the area of the connecting sleeve in order to improve the guiding of the plug at the point (or, as the case, also at the well end of the plug and/or the drill pipe).

If such additional guiding elements are constructed in a connecting sleeve, the present invention additionally provides longitudinal grooves to be constructed to extend beyond the advancing and impacting surfaces and to create radial transverse holes at the points. The advancing and impact surfaces are thus located in the area of the chip guide, which, as a result of the blockage by the longitudinal grooves, promotes "keep clean" of the propulsion and impact surfaces. In a sense, the advancing and impacting surfaces are thus blocked by such longitudinal grooves, so that it is repeatedly cleaned by the flow of a mixture of water and chips.

This facilitates the introduction of the sleeve into the plug and at the same time ensures a satisfactory guiding of the chip by the fact that the arrival of the guide on the inner side to the outer edge in the annular duct has a chip-promoting effect Flowing bevel. This flow of the chips therefore does not flow in front of the relatively large edge, but is smoothly transmitted forward on this transition by the bevel.

Among the various drilling applications, including the biasing of the plug in the drilling technique, the successful method is to mount the drill bit on a cylindrical or slightly conical polygonal or polygonal surface. The polygon in question can be a triangle or a polygon. The preferred embodiment is a hexagonal polygon or a triangular polygon. The face of the polygon (whether or not it is the rounded edge of the polygon) ensures the necessary transmission of the torque from the drill pipe to the installed drill bit. For this drilling operation, the drill bit is not separated tightly This is necessary during the pure drilling stage and is conventionally necessary because the bit is held in contact with the rock and the drill pipe by the force exerted by the pressure during the drilling operation. However, when looking for a position for the starting point of the wellbore, the drill bit can strike a lining element, such as a lattice arched beam, and the drill pipe is easily peeled off during the process. Further, if the flushing operation is accidentally turned on prematurely, the mounted drill bit can eject the polygon of the drill pipe by the flushing pressure of the flushing medium, that is, throw it very quickly. Further, in the case of a modern tunnel drilling apparatus having a so-called "automatic anti-interference system for a drill machine", problems may occur. When the sensor reports the risk of drilling interference, the system transmits the hammer drill and its downhole instrument string (connecting casing, drill pipe and drill bit) back opposite the axial direction of the borehole. This hazard exists if there is an increased torque during the drilling operation (which happens very frequently). However, when traveling back, the drill bit is peeled off or thrown by the unfastened bit by the flushing pressure. As the drill pipe advances forward again, it typically no longer encounters the drill bit that has fallen, and the drilling operation must be terminated for the wellbore in question. The result is a failed wellbore, a lost drill bit, and wasted working time. In order to avoid this series of problems, and thereby achieve a more efficient, reliable, and economical operation when creating combined boreholes and setting up wellbores, in accordance with yet another embodiment of the present invention, a drill bit is provided to have or have a An inner polygonal polygon or inner polygonal hole of the transverse hole, and the front end of the drill pipe has or forms a corresponding outer polygonal polygon having a gap or a corresponding outer polygonal shape, and provides a The fixing element is removed, which is to be locked in a form and/or force-locked in the cavity thus formed, in particular by means of a transverse bore. Constructed by this What is achieved is a reliable axial connection between the drill bit and the drill pipe, which can be severed in a predetermined manner, so that the possibility of the described problem is reduced; in particular, it is ensured in this way that In the case of a drilling operation, the drill bit is securely seated in front of the drill pipe and remains there until the connection between the drill pipe and the drill bit is terminated in a predetermined manner.

According to still another embodiment of the present invention, a fixing member to be constructed (in terms of its shape and its material properties) to have a holding force of at least 5 N and at most 800 N (preferably, from 10 N to 200 N) is provided. Depending on the threat to the drilling operation, the lower or upper limit should be observed. This adjustment of the prevailing conditions is possible without any problems due to the construction of the aforementioned fixing elements that can be removed or destroyed. The fixing element is inserted into the gap via the transverse hole as far as the gap, so that when a necessary removal operation takes place, a plane can also be achieved or pre-set which promotes the removal of the fixing element or allows the plane to be accurately set. In either case, in this way it is ensured that accidental removal or disassembly cannot occur, with the result that a complete drilling tool can always be used for scheduled drilling operations.

If the gap has the shape of a transverse groove (preferably a continuous or interrupted toroidal groove or hole) and the transverse hole is constructed as a cylindrical or conical radial hole, the drill bit and the drill pipe can be achieved. The optimization of the "connection". As a result of this, it is easier to achieve a predetermined degree of safety when installing the drill bit, and it is not absolutely necessary to accurately merge the lateral hole with the gap. A simpler assembly is achieved in this way.

One of the fixing elements advantageously provides a fixing element for the clamp (preferably a plastic clamp) to be designed for resilience, which is advanced or knocked into the radial bore in the drill bit, or by plastically deformable plastic or soft Metal (better Ground, in the form of a strip or line). This clamp can be easily fitted and brought into the fastening position, so that it also contributes to the assembly as a whole. As a result of forming it into a strip or wire, the fixing element can also be very easily introduced and held in its position to be encroached during the drilling operation. After this is completed and the drill bit is disassembled, the plastic or soft metal can be deformed or removed by the following means: the temporary connection between the drill bit and the drill pipe can be reliably cut.

Another possible configuration for the fixation element is a configuration in which the fixation element is constructed to be composed of a fluid or gel or foam material that can be infused or forced. This fixing element can be satisfactorily introduced into the hole or gap, and this fixing element can be possibly tightened or solidified at the point in order to then reliably when it is necessary to cut the connection between the drill bit and the drill pipe Release the drill bit.

Finally, the fixing element can also be constructed as an elastic, annular element that is constructed to be insertable into the annular groove section of the polygonal polygon of the drill pipe and the annular groove section on the inner wall of the drill bit. When advancing the drill bit, the annular fixing element is pushed into the groove section and ensures that the two parts (ie the drill pipe and the drill bit) remain connected, and from the point of view of the drilling technique, this is necessary or schedule.

It is particularly advantageous if the fixing element is an annular element consisting of an elastic material, preferably of plastic or rubber, which is inserted into the annular groove in the drill pipe and has a flattened inner surface on it. . In this way, the ring element is deformed upon insertion and the ring element is actually pressed flat in such a way that a very satisfactory force-locking connection can be achieved between the drill bit and the polygonal polygon or the drill rod.

In this case, it is particularly advantageous if the annular groove in the edge of the polygonal polygon is constructed to accommodate the annular element as a whole and is constructed on a flat side so as to be completely flat or not all flat. Placing or forming the ring member into the edge (holding the ring member solid at the edge) ensures that the ring member (which is actually "fixed" at a plurality of points) is also pulled into the row by a reliable means after insertion. Within the position of the program, in order to subsequently generate the desired force to lock the connection. The result is a deformation of the annular element in the region of the flat side, however, in these cases, since the annular element is fixed in the annular groove, the entrainment of the annular element can be reliably achieved.

In this case, it is particularly advantageous to design the annular groove so as to taper towards the side (starting from the edge), since the "twisting" of the ring element is then more satisfactorily protected, in particular when used for the ring element The "length" of the squeezing zone can be accurately preset by the length of the annular groove or a special configuration. In this case, this is progressive, with the result that, in any case, after the polygonal polygon is inserted into the drill bit container, the annular element is precisely located in the braking position that reliably prevents the improper opening of the drill bit.

If the inner surface of the drill bit container is slightly roughened, the annular element is pressed or deformed in a particularly uniform manner. Since in any case the polygonal polygon is compressed by the pressure at which the wellbore is generated (i.e., the end piece of the pipe plug or the drill pipe), the ring member always achieves the optimum position for the force-locking connection, as a result of this, In either case, the pull of the drill bit is opened or pushed open when the drill pipe is pulled back and the connection between the drill bit and the drill pipe is improperly cut.

Another form of embodiment provides a connecting sleeve for the end associated with the plug There is a push and impact surface that is blocked many times, and thereby has a rim that blocks the outer rim by a transverse hole. In this way, the plug can obtain the necessary impact force at this point without having to introduce too far into the connecting sleeve or into the combined propulsion, impact and ejection adapter. The corresponding propulsion and impact surfaces are actually constructed directly on the rim or end of the outer casing of the connecting sleeve, and at this point the pipe plug is gripped and transmitted from the impact of the drilling machine. The chips can be removed without any difficulty via blocking or transverse holes.

Even by this configuration of the connecting sleeve or its end, a certain amount of guidance is possible, since the self-propelled and impact surface at the outer rim begins to construct a narrow guide for the plug and the centering surface The face is blocked by the transverse holes and two to four transverse holes are provided in a manner distributed over the periphery of the connecting sleeve, thus also creating four advancing and impacting faces at this point. This has the advantage that even in this configuration, the chips can be reliably discharged at the appropriate end of the connecting sleeve, from which the chips can be removed reliably and without damaging operation. In such cases, the corresponding guide and centered surface is operative in either case and does not obstruct the effluent because the transverse bore blocks at this point a rim having a corresponding guide and a centered outer rim. However, this is sufficient for proper operation even in the case of a reduced guiding function of the plug. Even in these embodiments, there are sufficient propulsion and impact surfaces regardless of how many transverse holes are provided.

In the embodiment described earlier and in the form of an embodiment having a restricted guiding function, four transverse holes are provided in a manner distributed over the periphery of the connecting sleeve and thus also provided in the last described implementation The four propulsion and impact surfaces in the form of an example are all advantageous. As shown later in the diagram, horizontal The hole and the remaining advancing and impact surfaces can all have the same size.

The present invention (in detail) is distinguished by the fact that for the combined drilling and the process of setting the plug in the resulting wellbore, a connection is provided between the connecting sleeve and the connection between the drill pipe and the drill bit. The solution, which ensures that the assembly process is generally very efficient, very reliable and also (as a result of avoiding downtime) is very economical. As a result of the construction of the combined propulsion, impact and ejection adapters, the connection sleeves are advantageously formed on the one hand during the drilling process and, in addition, in the necessary assembly operations. The chips in the drill pipe can be removed in a predetermined manner so that they do not harm the drilling operation or the drilling technician. The latter is also protected in its work by the fact that the drill bit remains at the drill pipe, in particular on the drill pipe (as long as it is intended). The connection between the drill bit and the drill pipe is cut in a predetermined manner only after the end of the drilling operation, so that the drill pipe can be withdrawn from the pipe plug without the drill bit. The plug is then additionally secured in the well by the introduction of a cementitious material or a two-component adhesive (if required and necessary due to geological operations).

Additional details and advantages of the invention are apparent from the following description of the accompanying drawings in which <RTIgt;

In the drilling apparatus 1 shown in Fig. 1, the well 2 that will be produced or has been produced is only indicated generally. The drill bit 3 can be seen in the region of the deepest point of the wellbore, which is mounted on the drill pipe 5 and fastened via an axial fastening system 55. The drill rod 5 is surrounded by a tubular plug 4, in which case the latter is a closed tube that is guided all the way into the connecting sleeve 6 in such a way as to cover the drill rod 5. Pipe plug 4 additionally has a reference Numeral 7, in order to make it clear in this case, in which case the annular duct 22 between the outer wall 23 of the drill rod 5 and the inner wall 24 of the plug 4 contains the chips and water not shown here. In order to subsequently feed it into the annular space 11 of the connecting sleeve 6, the connecting sleeve 6 is constructed as a combined propulsion, impact and ejection adapter 10. This annular space 11 is equipped with transverse holes 14, 15 in the wall 8 of the casing so that a mixture of water and chips can be transmitted at this point.

At this end, the connecting sleeve 6 has an internal thread 12 which is designed to correspond to the external thread on the drill rod 5.

A connection 9 to the hammer drill is provided at the opposite end of the connecting sleeve 6, in this case also in the form of a corresponding internal thread.

Figure 1a shows a cross section through the drill pipe 5 and the plug 4, wherein the internal bore 33 is provided in the drill rod 5 for feeding the cooling fluid to become apparent. The annular duct 22 is constructed between the drill rod 5 having its outer wall 23 and the plug 4 having its inner wall 24. The general indication (in particular in the end region) is the guiding element 25, 26 which can be fitted to the inner wall 24 or the outer wall 23 in order to fasten the smoothing of the plug 4 relative to the drill rod 5 at this point. . These guiding elements 25, 26 are configured and constructed such that a sufficient residual cross section for the annular duct 22 is left.

In contrast to Figures 2 and 3, the key faces 50 are only positioned at different locations, and the ends of the connecting sleeve 6 appear to face the wellbore. The plug 4 shown in Fig. 2, which is not visible here, can be introduced into the connecting sleeve 6, providing an introduction cone 21 for each purpose. The encapsulating guide 18 is formed by a suitably constructed inner side 20 of the aperture in the connecting sleeve 6, while the outer side 19 has nothing to do with the enclosing guide 18. Also visible are transverse holes 14, 15 and advancing and impacting surfaces 17, the function of which is to ensure that the corresponding impact force is transmitted from the connecting sleeve 6 to the plug 4. Followed by The impact surface 16 transmits the same impact force, i.e., from the connecting sleeve 6 to the drill rod 5. A central flushing hole 13 is formed between the two internal threads 12 and 49 (in the form of a slide-in thread) for the hammer. The latter ensures a clear configuration for the impact surface 16 . The impact surface 48 is on the chamber side (via which the impact force is transmitted from the hammer drill to the connecting sleeve 6). The external thread 51 is on the end of the drill rod 5 in FIG.

In Fig. 3, the same parts have the same reference numerals, indicating that the insertion guide has a reference numeral 18' here so as to make a significant change compared to the representation in Fig. 2. It can be seen that in this case, the corresponding end of the connecting sleeve 6 has a tongue-like configuration in a sense to permit insertion into the plug 4. In addition, Figure 4 shows what it looks like when this connection is made. The support edge 34 is intended to ensure precise introduction and is then positioned between the connecting sleeve 6 and the plug 4.

The transverse holes 14, 15 in the wall 8 of the sleeve are extended in the direction of insertion of the guide rod 18', i.e. in the form of longitudinal ribs 28 and axial longitudinal grooves 29. The outer edge 30 of the corresponding insertion guide 18' has ramps 31, 32 to ensure or promote smooth guiding of the mixture of water and chips.

I have already seen Figure 4 earlier. The latter reproduces the connection between the pipe plug 4 and the connecting sleeve 6 by means of the external thread 51. Also visible is one of the transverse bores 14, the latter of which is apparently invisible while the longitudinal ribs 28 and the axial longitudinal grooves 29 are located inside the plug 4.

Other Figures 5 to 10 show the connection between the drill bit 3 and the drill rod 5. Figure 5 shows the drill bit 3 before pushing the drill bit 3 onto the drill pipe 5. For this purpose, the drill bit 3 has a polygonal polygon 35, while the front end 37 of the drill rod 5 has a corresponding multi-angle Edge 38. The latter is equipped with a gap 39 while the drill bit 3 has a transverse bore 36. The fixing element 40, additionally shown in Figures 7 to 9, is pushed into this transverse bore 36. The entire configuration is designated as an axial fastening system 55 which ensures that once the drill bit 3 has been pushed onto the drill pipe 5, it cannot be accidentally pushed away again. This is possible only by proper force consumption, and therefore the fixing element 40 should have a holding force of 10N to 200N.

According to FIG. 7, this axial fastening system 55 is designed as an elastic resiliently snap-fit element, designed as a plastically deformable element in FIG. 8, and shown in FIG. 9 as a hardenable gel, foam or the like. The site is injected into the component. Finally, Figure 10 shows an embodiment for this axial fixation system 55 in which a radially inner bore 42 is provided in the drill bit 3, i.e. in the form of an annular groove segment 44, while the annular groove segment 43 provides In the front end 37 of the drill pipe 5. The annular fixation element 40"" is located in both of them. The inner wall of the drill bit 3 is provided with reference numeral 45, and the annular groove segment 44 is disposed at this point. The water feed in the front end 37 of the drill pipe 5 is indicated by 53, which continues in the drill bit 3.

Figure 11 shows a drilling apparatus 1 in which a simplified guide 18 for a plug 4 is used for operation. The plug 4 is partially shown in the same manner as in Fig. 1, and the front end makes this apparent as the closed tube 7 being used as the plug 4. The drill rod detachably connected to the drill bit 3 via the fixing element 40 is indicated by 5. The transverse holes are indicated by 14, 15 and the chips can be transmitted through the transverse holes in the front end 61 of the connecting sleeve 6 (specifically, at the front end 61). The impact rim or impact end of the plug 4 is indicated by 63. The impact rim 63 is supported on the advancing and impacting surface 17 and the advancing and striking surfaces 60, 60', 60" respectively representing the outer rim 62 of the connecting sleeve 6. Starting from the outer rim 62, it is distributed over the connecting sleeve 6 The way around the perimeter provides a total Four transverse holes 14, 14', 15 allow the chips to be ejected at this point in the predetermined area without the need to pre-generate between the impact rim 63 of the plug 4 and the corresponding end 61 of the connecting sleeve 6. The gap.

Figure 12 illustrates the particular construction of the end 61 of the connecting sleeve 6 and the corresponding configuration of the transverse bores 14, 14', 15 as well. These transverse holes 14, 14', 15 block the advancing and impacting faces 60, 60', 60" and also the narrow guiding and centering faces 18". Via this narrow guide and centering surface 18", a limited (but still sufficient) guiding system of the plug 4 connecting the sleeves 6 is possible.

Figure 13 shows a form similar to the embodiment shown in Figure 10, except that in this case the drill bit 3 is reproduced in a cross-sectional portion (i.e., in the region of the drill bit container 71). In the lower region, the annular groove 65 into which the ring member 67 is inserted is visible, and the ring member 67 is unlikely to be subjected to load, i.e., it is not likely to be pressed by the inner face 70 of the bit container 71. When the polygonal polygon 38 is pushed into the polygonal polygon 35, the latter is fixed in such a way that it reaches its working position in either case without excessively sliding at an inappropriate position on the surface or sides 68, 69. The annular element 67 is reproduced by 67' in its deformed shape, which is the case on one of the sides 68 or 69.

This is illustrated by Figure 14, which shows that the annular groove 65 is constructed to appear tapered over the sides 68, 69, resulting in the creation of the primary zone 72 in the central region, wherein in either case, the annular element 67 The deformation can result in the necessary force to lock the connection. On the other hand, in the edge 66, 66', in either case, the ring element is also drawn into the working position, as already mentioned.

The inner surface 70 of the drill bit 3 or the drill container 71 is smooth, that is, at this point A groove, even a tapered groove 65, is realized. The inner face 70 of the drill bit container 71 can be slightly roughened to ensure an accurate and permanent fit of the ring member 67. In the region of the side faces 68, 69 (specifically, the main crush zone 72), when the drill bit 3 is pushed onto the polygonal polygon 38, the elastic O-ring or ring member 67 is radially pressed, as a result of this, A radial normal force is created between the O-ring or ring member 67 and the inner face 70 of the bit container 71. This, together with the high coefficient of friction between the rubber of the ring member 67 and the steel of the drill bit 3, results in a major frictional force that effectively counteracts the improper pull-out of the drill bit 3.

All of the features mentioned (including features that can be inferred separately from the drawings) are considered as an element of the invention, independently and in combination.

The invention will now be defined with reference to the following description: Description 1 relates to a tube for use in combined drilling and retention in a produced wellbore (2) for pre-rock stabilization (eg, in tunnel construction) A device for setting a plug (4) or a tubular anchor, the device having a drill rod (5) carrying a detachable drill bit (3), the tube plug (4) containing the drill rod (5), and a Connecting the sleeve (6), the drill rod (5) is to be connected to the handle of the hammer drill via the connecting sleeve (6), characterized in that the connecting sleeve (6) is constructed as a combined propulsion, impact and An ejection adapter (10) having an annular space (11) at the well end, the annular space (11) being connected to the tube plug (4) at all a tube (7) that is closed on the side and has a radial transverse bore (14, 15) for its portion that passes through the wall (8) of the sleeve, and the connecting sleeve (6) is also constructed to be at its front end There is a propulsion and impact surface (17) for the plug (4).

Description 2 relates to the device according to the description 1, characterized in that the connecting sleeve The tube (6) is constructed to have a guide rod (18) for the tube plug (4).

Description 3 is a device according to the description 2, characterized in that the connecting sleeve (6) has a cylindrical or combined cylindrical/conical guide rod (18) on the outer side (19), the guide rod (18) Allow for full free axial movement.

Description 4 is a device according to the description 2, characterized in that the connecting sleeve (6) has a cylindrical or combined cylindrical/conical guide (18') on the inner side (20).

Description 5 is a device according to the description 1, characterized in that the annular space (11) in the connecting sleeve (6) is designed to form an inner wall (24) present in the plug (4) and An extension of the annular conduit (22) between the outer walls (23) of the drill pipe (5), the cross-sections of the annular conduits (22) being geometrically similar, identical or substantially identical, and of substantially the same size.

Description 6 is a device according to the description 1, characterized in that the transverse holes (14, 15) in the wall (8) of the sleeve are constructed as elongated holes.

7 is a device according to any one of the preceding claims 1 to 6, characterized in that the guiding element (25, 26) and the inner wall (24) of the pipe plug (4) and/or the drill pipe (5) The outer wall (23) is associated, preferably at some point and leaving a sufficiently large residual cross section (27) for one of the annular conduits (22).

Description 8 is a device according to the description 7, characterized in that a plurality of guiding elements (25, 26) are provided in the form of longitudinal ribs (28) and axial longitudinal grooves (29), the longitudinal ribs The axial longitudinal grooves are configured to be distributed over the conduit cross-section at intervals.

Description 9 is a device according to the description 8 characterized in that the longitudinal groove (29) is constructed to extend beyond the advancing and impacting surface (17) at the point The radial transverse holes (14, 15) are created.

10 is a device according to any one of the preceding claims 1 to 9 characterized in that the outer edge (30) of the guide rod (18') on the interior that reaches the annular conduit (22) has A bevel (31, 32) that promotes the flow of chips.

11 is a device according to any one of claims 1 to 10, characterized in that the drill bit (3) having a polygonal polygon (35) on the side has a transverse hole (36) having a corresponding position The front end (37) of the drill rod (5) of the outer polygonal polygon (38) has a gap (39), and the detachable one of the fixing members (40) is locked in a form and/or force-locked manner. Therefore formed in the cavity.

Description 12 relates to the apparatus according to the description 11, characterized in that the fixing element (40) is constructed in terms of its shape and its properties to have a holding force of at least 5 N and at most 800 N, preferably 10 N to 200 N. .

Description 13 is a device according to the description 11, characterized in that the gap (39) has a transverse groove, preferably a continuous or interrupted circular groove or a hole shape, while the transverse hole (36) ) Constructed as a cylindrical or conical radial bore.

Description 14 relates to the apparatus according to the description 11, characterized in that the fixing element (40) is a fixture of resilience design, preferably a plastic clamp, which is advanced or knocked into the drill bit (3) One of the radial holes (42) or of a plastically deformable plastic or soft metal, preferably in the form of a strip or wire.

Description 15 is a device according to the description of the invention, characterized in that the fixing element (40) is constructed such that it can be injected or forced into a fluid or gel Or a foamy material.

The apparatus of any one of the preceding claims 1 to 15 characterized in that the fixing element (40) is constructed as an elastic, annular element and is constructed so as to be insertable into the drill rod (5) An annular groove segment (43) of the polygonal polygon (38) and an annular groove segment (44) on the inner wall (45) of the drill bit (3).

The apparatus of any one of clauses 1 to 16, characterized in that the fixing element (40) is an annular element (67) composed of a preferably plastic or rubber elastic material, the annular element ( 67) Inserted into one of the annular grooves (65) of the drill rod (5), and the inner surface (70) on which the drill bit (3) is located has a flat configuration.

Description 18 relates to the apparatus according to the description 17, characterized in that the annular groove (65) in the edge (66) of the polygonal polygon (38) is constructed to accommodate the annular element (67) as a whole, and Constructed on flat sides (68, 69) so that they are completely flat or not all flat.

Description 19 is a device according to the description 17, characterized in that the annular groove (65) is designed to taper from the edges (66) towards the sides (68, 69).

Description of the Invention The apparatus according to any one of the items 1 to 19, characterized in that the inner surface (70) of the drill bit container (71) is roughened.

Description 21 is a device according to the description 2, characterized in that the connecting sleeve (6) has a plurality of secondary thrust and impact surfaces blocked at the end (61) associated with the plug (4) ( 17, 60), and thereby having an outer rim (62) blocked by the transverse holes (14, 15).

Description 22 relates to the apparatus according to the description 21, characterized in that at the outer rim (62), from the advancing and impact surfaces (60), a narrow guide and a centering surface for the plug (4) are constructed. (18"), the face is blocked by the transverse holes (14, 15) and two to four transverse holes (14, 15) are provided in a manner distributed over the periphery of the connecting sleeve (6).

1‧‧‧Drilling equipment

2‧‧‧ Wellbore

3‧‧‧ drill bit

4‧‧‧ pipe plug

5‧‧‧Drill pipe

6‧‧‧Connecting casing

7‧‧‧Closed tube

8‧‧‧The wall of the casing

9‧‧‧Connect

10‧‧‧Combined propulsion, impact and ejectors

11‧‧‧Circular space

12‧‧‧ internal thread

13‧‧‧ center flushing hole

14‧‧‧ transverse holes

14'‧‧‧ transverse holes

15‧‧‧ transverse holes

16‧‧‧impact surface

17‧‧‧Protection and impact surface

18‧‧‧Enclosed guide rod

18'‧‧‧Insert guide

18"‧‧‧Narrow guide and centered

19‧‧‧ outside

20‧‧‧ inside

21‧‧‧Introduction cone

22‧‧‧Circular catheter

23‧‧‧Drilling rod wall

24‧‧‧The inner wall of the pipe plug

25‧‧‧Guide elements

26‧‧‧Guide elements

27‧‧‧Residual cross section

28‧‧‧ longitudinal ribs

29‧‧‧ axial longitudinal grooves

30‧‧‧ outer edge

31‧‧‧Slope

32‧‧‧Bevel

33‧‧‧Internal holes

34‧‧‧Support edge

35‧‧‧Polygonal polygon/internal polygon hole

36‧‧‧Transverse holes

37‧‧‧ front end of the drill pipe

38‧‧‧Polygonal polygon/polygon shape

39‧‧‧ gap

40‧‧‧Fixed components

40'''‧‧‧" ring fixing element

42‧‧‧radial holes

43‧‧‧ annular groove segment

44‧‧‧ annular groove segment

45‧‧‧The inner wall of the drill bit

48‧‧‧impact surface

49‧‧‧ internal thread

50‧‧‧ key face

51‧‧‧ external thread

53‧‧‧Water feed

55‧‧‧Axial fixation system

60‧‧‧Protection and impact surface

60'‧‧‧Protection and impact surface

60"‧‧‧Protection and impact surface

61‧‧‧Connecting the front end of the casing

62‧‧‧ outer rim

63‧‧‧ Impact rim or impact end

65‧‧‧ annular groove

Edge of 66‧‧

66'‧‧‧ edge

67‧‧‧ ring element

67'‧‧‧ Shape of the deformation of the ring element

68‧‧‧ side

69‧‧‧ side

70‧‧‧ Inside the drill container

71‧‧‧Drill container

72‧‧‧Main zone/main extrusion zone

Figure 1 shows a drilling apparatus without a drilling machine in a perspective view (partially in section); Figure 1a shows a cross section of a region where the pipe plug overlaps the drill pipe; Figure 2 shows a connecting sleeve having an inner guiding rod; Figure 3 shows a connecting sleeve with an external guiding rod; Figure 4 shows the connecting sleeve according to Figure 3 in the region of the transition to the drill pipe/plug; Figure 5 shows the connection between the plug and the drill pipe The front portion of the axial fastening system; Figure 6 shows the connection shown in Figure 5 after the drill has been installed; Figure 7 shows a first embodiment of the axial fastening system; Figure 8 shows the second of the axial fastening system Embodiments; Figure 9 shows a third embodiment of an axial fastening system; Figure 10 shows a further embodiment of the axial fastening system; Figure 11 shows a drilling device with a slit connection sleeve and restricted guidance Figure 12 shows the cut-away connecting sleeve according to Figure 11 reproduced in an enlarged scale; Figure 13 shows the cut end piece of the drill bit (i.e., actually, the drill bit container having the polygonal polygon of the introduced drill pipe); Figure 14 shows a simplified representation of a polygonal polygon with annular grooves and ring elements.

1‧‧‧Drilling equipment

2‧‧‧ Wellbore

3‧‧‧ drill bit

4‧‧‧ pipe plug

5‧‧‧Drill pipe

6‧‧‧Connecting casing

7‧‧‧Closed tube

8‧‧‧The wall of the casing

9‧‧‧Connect

10‧‧‧Combined propulsion, impact and ejectors

11‧‧‧Circular space

14‧‧‧ transverse holes

15‧‧‧ transverse holes

17‧‧‧Protection and impact surface

18‧‧‧Enclosed guide rod

19‧‧‧ outside

20‧‧‧ inside

22‧‧‧Circular catheter

23‧‧‧Drilling rod wall

24‧‧‧The inner wall of the pipe plug

25‧‧‧Guide elements

26‧‧‧Guide elements

27‧‧‧Residual cross section

55‧‧‧Axial fixation system

Claims (19)

An apparatus for drilling and fastening a well for use in a pre-rock stabilization process, wherein the apparatus comprises: a drill rod (5) to which a drill bit (3) is detachably mounted, a pipe plug (4) having a closing pipe (7) for receiving the drill pipe (5), and a connecting sleeve (6) for connecting the drill pipe (5) to a hammer drill, the connection The casing (6) has a wall (8), and a well end (61) has one or more propulsion and impact surfaces (17) for transmitting a collision to the pipe plug (4), wherein the well hole The end (61), the connecting sleeve (6) and the drill pipe (5) form an annular space (11), the annular space is connected to the pipe (7), wherein the connecting sleeve (6) the drill pipe (5) connected to a hammer drill; the well end (61) has a guide rod (18, 18', 18") for the plug (4), which is provided with the plug (4) In or on the capacity; and the connecting sleeve (6) has one or more radial transverse holes (14, 15) extending through the wall (8) and in communication with the annular space (11). The apparatus of claim 1 wherein the guide is an encapsulating guide (18) on an outer surface (19) such that the plug (4) can be introduced into the connecting sleeve (6) in. The device of claim 1 or 2, wherein the connecting sleeve (6) comprises an introduction cone (21). The apparatus of claim 1 or 2, wherein the transverse holes (14, 15) in the wall (8) of the sleeve are constructed as elongated holes. The apparatus of claim 1 or 2, wherein an annular conduit (22) is formed between an inner wall (24) of one of the plugs (4) and an outer wall (23) of the drill rod (5). The apparatus of claim 1, wherein the guide rod is a plug (18') inserted into one of the inner surfaces (20) such that the insertion guide (18') can be inserted into the plug (4) )in. The device of claim 6, wherein the insertion guide (18') has a tongue configuration. The apparatus of claim 7, wherein the insertion guide (18') comprises one or more longitudinal ribs (28) and axial longitudinal grooves (29), the one or more longitudinal ribs (28) And the axial longitudinal grooves (29) are configured to be evenly spaced apart from the cross-section of the conduit. The apparatus of any one of claims 6 to 8, wherein an annular conduit (22) is formed between an inner wall (24) of the plug (4) and an outer wall (23) of the drill rod (5) . The apparatus of claim 1, wherein the connecting sleeve (6) has a toothed outer rim (62) at the well end (61) that forms the advancing and impacting surface (17, 60), thereby The transverse holes (14, 15) are formed when the plug (4) is adjacent to the outer rim (62). The apparatus of claim 10, wherein the guide is for guiding of the plug (4) and centering (18"), the guiding and centering surface (18") from the advancing and impacting surface (60) ) is constructed at the outer rim (62). The apparatus of claim 1 or 2, wherein the connecting sleeve (6) has an internal thread (12) for attachment to an external thread (51) on the drill rod (5). The apparatus of claim 1 or 2, wherein the connecting sleeve (6) has an internal thread (49) for coupling to one of the threads on the hammer drill. The device of claim 13, when attached to the request item 12, wherein the connection The sleeve (6) further has a central flushing bore (13) that is constructed between the internal threads (12, 49). The apparatus of claim 1 or 2, wherein the inner wall (24) of the plug (4) and/or the outer wall (23) of the drill rod (5) is provided with one or more guiding elements (25, 26) ). The apparatus of claim 1 or 2, wherein the drill bit (3) forms an inner polygonal hole (35), and the front end (37) of the drill pipe (5) has a corresponding one formed with a gap (39) External polygonal shape (38). The apparatus of claim 16, wherein the drill bit (3) has a transverse hole (36), and wherein a removable fixing member (40) is disposed by the lateral hole (36) in the cavity thus formed in. The apparatus of claim 16, wherein the outer polygonal shape of the drill pipe (5) has an annular groove segment (43) and/or the inner polygonal hole (35) of the drill bit (3) on an inner wall thereof (45) having an annular groove segment (44), and wherein the annular fixing member (40, 67) is constructed as an elastic member for insertion into any of the annular groove segments (44) or In both. The apparatus of claim 16, wherein the inner face (70) of the inner polygonal aperture (35) is roughened.