WO1993004257A2 - Bohrrohr - Google Patents
Bohrrohr Download PDFInfo
- Publication number
- WO1993004257A2 WO1993004257A2 PCT/EP1992/001149 EP9201149W WO9304257A2 WO 1993004257 A2 WO1993004257 A2 WO 1993004257A2 EP 9201149 W EP9201149 W EP 9201149W WO 9304257 A2 WO9304257 A2 WO 9304257A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pipe
- drill
- anchor
- thread
- drilling
- Prior art date
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 53
- 238000002347 injection Methods 0.000 claims abstract description 44
- 239000007924 injection Substances 0.000 claims abstract description 44
- 125000006850 spacer group Chemical group 0.000 claims abstract description 42
- 230000006835 compression Effects 0.000 claims abstract description 21
- 238000007906 compression Methods 0.000 claims abstract description 21
- 230000008878 coupling Effects 0.000 claims abstract description 19
- 238000010168 coupling process Methods 0.000 claims abstract description 19
- 238000005859 coupling reaction Methods 0.000 claims abstract description 19
- 229920003023 plastic Polymers 0.000 claims description 11
- 239000004033 plastic Substances 0.000 claims description 11
- 239000013013 elastic material Substances 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 2
- 239000011435 rock Substances 0.000 abstract description 23
- 239000002245 particle Substances 0.000 abstract description 10
- 230000002411 adverse Effects 0.000 abstract 1
- 238000004140 cleaning Methods 0.000 abstract 1
- 239000012530 fluid Substances 0.000 abstract 1
- 239000004570 mortar (masonry) Substances 0.000 description 29
- 238000011010 flushing procedure Methods 0.000 description 18
- 239000000725 suspension Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 6
- 238000003825 pressing Methods 0.000 description 6
- 230000000875 corresponding effect Effects 0.000 description 5
- 238000004873 anchoring Methods 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000008093 supporting effect Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
- E21B17/0426—Threaded with a threaded cylindrical portion, e.g. for percussion rods
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1014—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well
- E21B17/1021—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well with articulated arms or arcuate springs
- E21B17/1028—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well with articulated arms or arcuate springs with arcuate springs only, e.g. baskets with outwardly bowed strips for cementing operations
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/10—Valve arrangements in drilling-fluid circulation systems
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
- E21D21/0053—Anchoring-bolts in the form of lost drilling rods
Definitions
- the invention relates to a drill pipe according to the preamble of claim 1.
- Drill pipes are known in many forms and for different purposes. For example, they can be used as elements of injection drill anchors which, as is known, structurally correspond essentially to a drill rod and remain in it as a lost tool after the drill hole has been created.
- the boring bar is used in the manner of a rock anchor, which is clamped above the rocker head plate in connection with a clamping nut in the area of the borehole opening opposite the mountains.
- an injection drill is known, at one end a drill head and at the other At the end of a stepped threaded section is attached, which is used for screwing by means of the clamping nut mentioned.
- the anchor rods are provided over their entire length with helically wound beads as well as with transverse bores, which are in continuous connection with a centrally running longitudinal channel, via which the rock dust developed during the drilling process is drawn off.
- a mortar suspension is introduced into the borehole via the longitudinal channel and the transverse boreholes for the purpose of backfilling and anchoring the anchor rod. This suspension introduces into existing gaps and crevices in the rock and, in particular, due to the bead-like deformation of the outside of the anchor rod after hardening Form-fit between anchor rod and surrounding mountains enables.
- DE-PS 14 83 840 shows a rock drilling rod with a centrally located flushing channel, which is provided with outlet bores in the area of a screwable drilling head.
- the rock drill rod or anchor rod can be extended using a connecting sleeve provided with an internal thread, into which a further anchor rod is screwed, and the anchor rods used are otherwise made over their entire length with a comparatively coarse thread in the manner of a round thread ⁇ ready.
- Such a rock drilling rod is fundamentally suitable for use as an injection drill, the external thread of the anchor rods fulfilling a transport function during drilling, namely in that the backflow of a flushing liquid loaded with rock particles is supported.
- the same thread fulfills an anchoring function in connection with the hardened mortar, namely insofar as it creates the positive connection between the anchor rod and the surrounding borehole walls.
- the thread also fulfills a screwing function by enabling screwing with a connecting sleeve, but also with a drill head.
- Spacers in connection with injection drilling anchors are known from DE-PS 38 28 335, which consist of a mounting hub which directly surrounds the armature rod and which is displaceable relative to the armature rods, with three radially extending webs being arranged on this mounting hub, which have a outer Ring body are held together.
- the use of this spacer is such that during the creation of a borehole, and specifically before the attachment of an extension anchor rod, this spacer with its mounting hub is pushed over the anchor rod end located in the borehole, whereby due to the abutment of the holder hub on one which enables the connection of an extension anchor rod Coupling nut of the spacer is inserted into the borehole together with the anchor rod during the further drilling step.
- the position of the spacer is thus determined in this embodiment by the position of the coupling nut.
- spacers when placing rock anchors, by means of which spacers are centered within the outer tube of the bore.
- the rock anchor is inserted into a pipe filled with mortar and should be kept as centrally as possible within it.
- the spacers used here exist made of plastic and are otherwise completely unsuitable for use in injection drill anchors of the known type that they can hardly cope with the high mechanical stresses during the drilling phase.
- This object is achieved in a generic drill pipe by the features of the characterizing part of claim 1.
- Essential to the invention is thus the use of a tubular element as a drill pipe which has a uniform internal thread over its entire length.
- this internal thread is intended in connection with a suitable coupling part for the extension, ie for screwing on a further pipe element, and this opens up the possibility of carrying out this extension without the use of structural elements applied on the outside, such as, for example, connecting sleeves or the like.
- the uniform profiling also means that the drill pipe is suitable as an injection drill anchor, which therefore extends over its entire length mortared length is subject to a uniform doping effect.
- the uniform internal thread also offers the possibility of being able to shorten the pipe element if necessary and to connect correspondingly shortened lengths to other drill pipes.
- Pipe element in a single operation for example by cold forming the outside.
- the thread thus extends uniformly over the entire length of the drill pipe, with the result that even over this entire length a uniform conveying effect is exerted on the flushing medium loaded with rock particles during the drilling process.
- the coupling part practically consists of two pipe parts which are plugged into one another and thus coaxial with one another, namely an outer pipe element, at least provided with an external thread, and an inner pipe element inserted, for example screwed therein, which preferably protrudes symmetrically from the outside of the outer pipe element and, with its protruding sections, forms the threaded sections which are intended for screwing into two drill pipe elements to be connected to one another on the end face.
- the outer and inner tubular elements are each designed as threaded tube elements, which carry threads on the inside and outside, so that the outer tube element is screwed onto the inner one and is expediently fixed in a middle position by welding.
- claims 5 to 7 are directed to a particularly advantageous embodiment of a drill head which, in turn - apart from its plate-like drill bit - can be made from structural elements which correspond to those of the coupling part.
- the result is a drill head which - starting from the drill bit initially has an undercut and which is intended for screwing to a drill pipe element, ie for screwing into it.
- the drill head is equipped on its side facing away from the drill bit with a pipe section provided with an external thread and intended for screwing into the drill pipe element.
- the one from the outer pipe element outstanding pipe section of the inner pipe element forms the pipe section intended for screwing, ie, section intended for screwing into a drilling pipe element.
- the outer tubular element in turn forms a stop during the screwing with the drilling tubular element and is, moreover, preferably identical to the drilling tubular element with regard to its radial dimensions and in particular its outside thread.
- the boring bar designed in the above sense can already be used in a manner known per se as a boring bar and rock anchor, namely as an injection drill anchor.
- claims 9 to 11 are directed in particular to the configuration of the drill pipe according to the invention with regard to its use as an injection drill and in this context have special configurations which relate to the introduction of mortar or another hardenable medium.
- a check valve in the area of the drill anchor near the drill head and one or more injection valves are to be mentioned in this context.
- Both the named check valve and the compression valve are arranged in intermediate elements which in turn are intended for screwing, in this case for screwing into drilling pipe elements or anchor rod elements to be connected to one another.
- the number and the arrangement of the compression valves can be made arbitrarily due to the modular design of the intermediate elements mentioned become. In certain cases, only a check valve or one or more compression valves can be provided.
- both can be regarded as spring-loaded valves which, however, are never in the opening state at the same time.
- the check valve should only be opened by the flushing medium during the drilling operation, although the comparatively low flushing agent pressure is not sufficient to open the injection valves, so that the latter remain in a closed state during the drilling and flushing operation.
- this will practically only flow out via the pressing valves, the check valves being inoperative and blocking at this stage due to the hardening of the original mortar filling.
- claims 12 and 13 are directed to the nature of the intermediate elements mentioned in detail.
- the essential structural elements of these intermediate elements are in turn inner and outer tube elements, the outer tube element in turn being provided on the inside and outside with threads and intended for screwing onto the inner tube element and the radial dimensions of which in turn correspond to the drilling or anchor tube element.
- Pipe sections of the inner pipe element which protrude from the outer pipe element in turn form the screw sections which are intended for screwing into anchor pipe elements to be connected, the screw-in depth being in turn defined in a defined manner via the outer pipe elements.
- the outer tubular elements are preferably in their final screwing position secured by welding against the inner tube elements.
- the features of claim 14 are directed to the structural design of the Verpreßve ⁇ tils. It is essential that the enveloping body that takes over the actual function, which for example consist of a rubber-elastic material, is axially secured between two tube cylinders of the same diameter, these tube cylinders in turn having the radial dimensions and the external characteristics of the armature provided with an external thread. Pipe element correspond.
- Two enveloping bodies are preferably used, namely an inner one consisting of a relatively soft, elastic material, which takes over a sealing function, and an outer one, which in turn is made of an elastic, for example rubber-elastic material, which takes over a supporting function and, if necessary, through a fabric is modified in its elastic properties.
- the enveloping bodies fit into the "smooth" structure of the possibly lengthened anchor rod in the same way as the tube cylinders adjoining them axially on both sides, and the compression valve thus in particular does not form radially from the structure of the anchor rods projecting structural elements which - as already explained at the beginning - could hinder the flow of a flushing medium.
- claims 16 and 17 are directed to a spacer which, with regard to its practical use, is specifically designed for drill pipes or anchor rods according to the invention.
- the essential feature of this spacer is connected by two radially shaped tension elements that fulfill a spacing function. 01 the centering body, which are intended to be pushed over the anchor rod and wherein a special pressure rod is provided for the feed, which is attached to a guide body facing the bottom of the borehole.
- the push rod is designed to be insertable with respect to the receiving device. It is essential that the spacer is only inserted into the borehole after it has been drilled, which is possible because the anchor rod despite
- 10 tueller extension rod and compression valves has a uniform diameter over their entire length and the sliding resistance at least the centering body along the entire anchor rod is uniform. It will be this spacer
- the spacer is not strength with regard to the mechanically very high demands on the drilling operation and must also be designed as a plastic part. However, this is preferably made of metal.
- the features of claim 18 are directed to improved guidance of the pressure rod.
- the Zentri mecanicsk ⁇ rper are designed according to the features of claim 19 as a tubular element. If necessary, the pipe element facing the bottom of the borehole can have a rounded shape on the end face, so that wall inhomogeneities can be smoothed.
- the pressure rod can be inserted into said receiving device according to the features of claim 20. It must have a rigidity which is sufficient to overcome the feed resistance of the spacer. If this is the case, a rollable body can also be used as the pressure rod.
- claims 21 to 24 are directed to a special embodiment of the end of an injection drill rod on the borehole mouth, again making use of the basic structural elements of the other components of the injection drill anchor, namely tubular cylinders, which are threaded on the outside and - preferably also on the inside as well as pipe elements, which have a thread at least on the outside and are designed and designed for insertion or screwing into the tube cylinders.
- the last-mentioned pipe elements form the screw-in sections, which are designed for screwing in, for example, in an armature rod element, and the external thread of the pipe cylinder forms a constant screw connection. Extension of the external thread of the anchor rods.
- the threaded sections of the "internal" tubular element which are defined for screwing in, are designed such that the aforementioned tubular cylinder rests on the end face on corresponding mating surfaces of an anchor rod.
- the pipe element which partially protrudes from the borehole mouth, is used for bracing against the rock.
- the aforementioned tubular element is also used to push a plastic hose over a so-called free anchor length in the region of the bore hole opening, which is not mortared with the surrounding mountains. This plastic tube is pushed up to an end-face contact with the adjoining tube cylinder, so that the section of the tube element surrounding the tube is shielded from any interactions with a mortar.
- Fig. 1 shows an embodiment of an inventive drill anchor in largely disassembled state
- FIG. 2 shows an illustration of a coupling part according to the invention for connecting two anchor rods
- FIG. 3 shows an exemplary embodiment of a spacer according to the invention, intended for use in the case of an injection drilling rig according to FIG. 1;
- FIG. 4 shows an illustration of the borehole mouth-side end region of an injection drill anchor according to FIG. 1 in the largely dismantled state.
- the essential components of the injection anchor shown in FIGS. 1 and 2 are a drill head 1, an anchor rod 2 and a coupling part 3, which is designed and designed to connect two identical bores 2.
- the drill head 1 consists of axially comparably short, plate-like drill bits 4, which are equipped with cutting edges or similar cutters, on which a pipe element 5 is welded.
- the entire length of the tube element 5 is provided with an external winding and it is screwed onto this tube element 5 into a tube cylinder 6 and welded to this in the screwing position.
- the Rohrzyli ⁇ der 6 is shorter than the Rohr ⁇ l ⁇ - m ⁇ t 5 and it is the screw position characterized in that the Rohreleme ⁇ t 5 on the side facing away from the Bohrkron ⁇ 4 of the tubular cylinder 6 by Dimension 7 protrudes from the latter.
- the tube cylinder 6 is provided with an external thread, the meaning of which will be discussed in more detail below.
- 6 1 denotes a transverse bore, which penetrates the tubular element 5 and the tubular cylinder 6 and establishes a connection to the longitudinal channel referred to above all outlet bores including the transverse bore / transverse bores 6 ', while the drilling operation is being carried out, detergent, for example water or water air is also carried, whereby after the drilling of the borehole, a mortar suspension or another comparable hardenable medium flows into the borehole through these boreholes.
- the tube element 11 is partially screwed into the tube cylinder 10 and can be fixed in the screw position, for example by welding.
- the tube cylinder 10 is in turn intended to be screwed to the tube element 5, i ⁇ sb ⁇ so ⁇ d ⁇ r ⁇ whose tube section 12.
- the intermediate valve 9 contains a check valve, not shown in the drawing, which is arranged within the longitudinal channel extending in the direction of the axis 8. This check valve is loaded and set to a certain pressure, and to the extent that there is a flow in the direction of arrow 13 under pressure, but prevents backflow against arrow 13. The importance of this check valve will be discussed in more detail in the following.
- the anchor arm 14 designates an anchor rod element which corresponds in diameter to the tubular cylinders 6, 10 and is provided with a continuous thread on the outside and on the inside.
- the anchor arm 14 can have an individually adapted length and, in the assembled state, is screwed to the tube section 15 of the tube element 11 projecting from the tube cylinder 10 in such a way that the anchor rod element 14 bears on the end face of the tube cylinder.
- a compression valve which consists of a tube element 16, which in a central area has one or more transverse holes 17 in a uniform pattern.
- the transverse bores 17 were surrounded by a first envelope 18 made of a relatively soft, elastic material, the outside of which was coaxial with another, also elastic, one which had a supporting effect
- Envelope body 19 is surrounded.
- the enveloping bodies 18, 19 form a reliable seal of the transverse bores 17 when the pipe element 16 is in the non-pressurized state of the pipe element 16.
- the tube cylinder 20, 21 are similarly referred to as short tube cylinders, which are screwed onto the tube element 16 axially on both sides of the enveloping body 18, 19 and one Form axial securing for the enveloping body.
- the tube cylinder 20, 21 can be secured in the final screw position by welding to the tube element 16.
- the tube cylinders 20, 21 and the enveloping body 19 are otherwise of the same diameter.
- the tube cylinders 20, 21 in connection with the enveloping bodies 18, 19 also have such an axial length that there are 15 tube sections 23, 24 on both ends of the compression valve 15, which are screwed into the anchor rod 14 and other side into the anchor rod 2 are determined. The importance and mode of operation of the compression valve 15 will be discussed in more detail below.
- the components comprising the pressing valve 15 form a further intermediate element 9 '.
- the embodiment of the compression valve in the manner set out above is not absolutely necessary, and other embodiments can also be used. It is only essential that the compression valve has components protruding radially beyond the tubular cylinders 20, 21 and is designed functionally in the manner of a spring-loaded check valve, which only opens when such pressure is required for subsequent pressing, on the other hand during the flushing operation in Locked state remains.
- Pipe element 25 which corresponds to the diameter of the pipe elements 5, 11, 16 and which carries a screwed-on pipe cylinder 26 approximately in the middle, which corresponds to the diameter of the anchor rod 2 ⁇ .
- Pipe sections 27, 28 of the pipe element 25 extend approximately symmetrically on both sides of the pipe cylinder 26, and the position of the pipe cylinder 26 can be weld with the tubular element 25 be secured.
- the coupling part 3 is used to couple a further anchor rod 2 such that its pipe sections 27, 28 are screwed into the anchor rod to be connected, in such a way that the front ends of the anchor rod to be connected are directly adjacent to the pipe cylinder.
- anchor rods 2 or anchor rod elements 14 which are provided with a thread on the inside and outside over their entire length, with the individual elements of this drill anchor, namely drill head 1, intermediate rod element 2, anchor rod element 2, 9, and 2 Further anchor rod connections 2 connected via coupling parts 3 are fixed to one another by means of screwing on the inside. Due to the fact that the anchor rods 2 and 14 are provided over their entire length with a similar internal and external winch, they can be cut to length in any case and adapted to the particular application. By means of a corresponding longitudinal dimensioning of the pipe sections 12, 15, 23, 24, it is achieved in a very simple manner that the final screw-in position is determined by the length dimensioning of this pipe section and consequently no further steps are necessary. The same also applies to the coupling part 3, the central tube cylinder 26 of which performs a stop function for the ends of the rod ends screwed on the tube sections 27, 28.
- the ektio ⁇ sbohrank ⁇ r according to the invention in the assembled state despite being composed of different Functional element has an outside - starting with the tubular cylinder 6 of the drill bit 1 and extending to the area of the hole opening, uniform outer contour characterized by an external thread, which in particular has no parts protruding from this contour.
- the mounted injection drill bit forms a "smooth" surface on the outside.
- This injection drill anchor is first used in a manner known per se like a drill rod, i.e. a rinsing medium flows through the central longitudinal channel extending in the direction of the axis 8, e.g. Water or air.
- This flushing medium only emerges during drilling operation via the outlet bores of the drill bit 4 or the transverse bores 6 'of the drill head, takes up the rock particles loosened by the drill bit 4 as a result of the drilling operation, in order to move them in the opposite direction to the arrow 13, thus in the direction the Bohrl ⁇ chmündu ⁇ g to carry out.
- the flushing medium exerts a cooling effect on the drill bit. It is particularly advantageous that there is an undercut 29 directly opposite the arrow 13 in the direction of the arrow 13 behind the drill bit 4, which undercuts the removal of the solid rock particles or the other drill bits.
- the check valve which is spring-loaded and arranged within the intermediate element 9 and within the above-mentioned longitudinal channel, must be such that it is under the pressure, below the flushing medium, during the drilling operation and opens in the direction of the arrow 13 permits.
- the compression valve 15, however, is by corre sponding Material and other design of the enveloping body 18, 19 designed such that an opening does not take place under the flushing pressure, so that this compression valve 15 is practically inoperative during the drilling operation.
- the injection drilling anchor After completion of the borehole, the injection drilling anchor, in particular its longitudinal borehole, is used for introducing a metal suspension or another hardenable medium which, in a first phase, only exits via the outlet borehole and other transverse boreholes of the drilling head 1 and the borehole emerges starting and filling in the opposite direction to the arrow 13-proceeding.
- the check valve within intermediate element 9 prevents backflow of mortar suspension in the narrow longitudinal channel.
- the longitudinal channel is rinsed out in order to ⁇ tf ⁇ rn ⁇ n within the same still remaining mortar suspension.
- the mortar suspension exiting the compression valve 15 blows up the mortar body surrounding the injection drilling tank in this area, at least in the initial phase of hardening, and flows over the gaps between the sprayed particles of the same, and the borehole then flows into the borehole of the high pressure spreads increasingly within the surrounding crevices of the mountains and in some cases considerably expands the mortar body.
- the process of rinsing out the longitudinal channel and reinserting and spreading the mortar body can be repeated several times, it being possible to burst open with mortar, but also with water.
- the mortar body surrounding the injection drill anchor is thus expanded in the region of the compression valve and a reliable anchoring effect is generated.
- one or more injection valves can be provided along the structure of the rock anchor, which, due to the modular structure of the individual construction elements of the injection hole, can be inserted into the structure thereof at practically any desired location.
- FIG. 3 shows an exemplary embodiment of a spacer according to the invention, which is designed to interact specifically with an injection drill anchor according to FIGS. 1 and 2.
- the spacer is in its totality, which among other things consists of two axially spaced apart from one another, with diameters to be used for anchoring rods 2 or tube cylinders 6, 21, 20, 20 and 20, 14, 20, 20 in diameter ⁇ tten, zuei ⁇ and ⁇ r coaxial Rohrmentss 31, 32 or Z ⁇ trier emotions consists.
- These tube elements 31, 32 are smoothly formed on the inside and outside and are connected via a system of five, plus radially central plane 33, sy metrically shaped, elastic tension element 34. If necessary, other such cables 34 may also be provided, preferably in a uniform circumferential distribution.
- the extent of the angulation of the tie rods 34 is such that that in the relaxed state
- the area with the largest radius 35 located in the center plane 33 corresponds at most to the radius 36 of the drill bit 4.
- the system of tube elements 31, 32 and tension elements 34 is made of steel, the tension elements 34 being welded in a suitable manner to the tube elements 31, 32 or in any other way connected to them. In principle, however, it is also possible to produce this spacer from a corresponding plastic.
- the tensile elements 34 are dimensioned in terms of their elasticity such that there is a certain deflection capacity in the direction of the arrow 37, but in any case a sufficient supporting action must be possible on the anchor rod guided in the tube elements 31, 32, in such a way that this anchor rod is kept as centrally as possible within the borehole. This will be discussed in more detail below.
- the blind bore 39 and the through bore 41 have approximately the same diameter and the diameter of the receptacle a pressure rod 43, which is locked in the direction of the arrow 44 in the blind bore 39 and is freely movable against the through bore 41.
- this is used like a drill head provided with a drill head, whereby a flushing agent, for example air, is passed over the central channel, for example air, which picks up the mountain particles as a result of the drilling operation and transports the hole between the inside and the outside of the inside Direction towards the mouth of the borehole.
- a flushing agent for example air
- the central channel for example air
- the spacer 30 is pushed forward using the pressure rod 43, which acts directly on the pipe element 31 facing the borehole column and thus via the tensile force 34 on the pipe element 32 facing the borehole bore.
- the extent of the angulation of the tension element 34 in the center plane 33 is also such that the
- the range of the tensile elements 34 resiliently rests against the wall of the borehole so that this Rohr ⁇ l ⁇ m ⁇ nte 31, 32 and thus the anchor rod 2 are guided centrally.
- the pressure rod 43 must have such a length that practically corresponds to the final mounting position of the spacer. It can be made of an elastic material that can be unwound from a roll, but which has at least one inherent stiffness in order to be able to apply the aforementioned tensile force.
- the injection drill anchor is thus characterized by an even coverage of mortar over its entire borehole length and thus a reliable and reliable corrosion protection. From the safe and unambiguous center of the anchor rod / anchor rod within the borehole, uniform strength properties of the anchorage with respect to the surrounding mountain range also result and this injection drill anchor becomes more like a conventional one Injection drill anchor is used, ie an anchor plate together with a lock nut is placed over the part protruding from the bore hole opening.
- a graphic representation of these two, known construction elements has been dispensed with.
- FIG. 4 denotes a closure element, which consists globally of a tubular cylinder 46 which is designed in accordance with the anchor rods 2 with regard to its external and internal thread and its radial dimensions.
- a tube element 47 is screwed into this tube cylinder 46, in such a way that it protrudes on one side by a length dimension 48 from the former.
- This protruding part of the tubular element 47 forms a screw section which is intended to be screwed into an end of an anchor rod 2, in such a way that in the screwed state the tubular cylinder 46 bears directly against the anchor rod 2 and virtually forms its extension.
- the end 50 of the tubular element 47 facing away from the screwing section is located within the tubular cylinder 46, specifically at a distance 49 from its associated end. This end thus forms a stop or a screw-in limitation for an end part 51, which corresponds to the tubular element 47 with regard to its external thread and its radial dimensions.
- This end part 51 is the end protruding from the borehole mouth, which in the final state of the injection drill anchor serves for screwing on a clamping nut in connection with an armature plate.
- a plastic hose 52 is slipped over this end part 51, which hose can be made of PVC (polyvinyl chloride), for example.
- PVC polyvinyl chloride
- the plastic hose 52 lies in the water-tight end of the pipe cylinder 46 and the length of the plastic hose 52 is the length of the injection hole that is not connected to the drill hole and is not the bore hole , since the plastic hose 52 rules out a composite effect between this end part 51 and the surrounding mortar.
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Piles And Underground Anchors (AREA)
- Earth Drilling (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Drilling Tools (AREA)
- Branch Pipes, Bends, And The Like (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/988,969 US5350024A (en) | 1991-08-17 | 1992-05-22 | Drill pipe |
AU18837/92A AU653030B2 (en) | 1991-08-17 | 1992-05-22 | Drilling pipe |
EP92911093A EP0553309B1 (de) | 1991-08-17 | 1992-05-22 | Bohrrohr |
JP51042692A JP3196850B2 (ja) | 1991-08-17 | 1992-05-22 | ドリルパイプ |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4127249A DE4127249C1 (de) | 1991-08-17 | 1991-08-17 | |
DEP4127249.8 | 1991-08-17 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1993004257A2 true WO1993004257A2 (de) | 1993-03-04 |
WO1993004257A3 WO1993004257A3 (de) | 1993-04-01 |
Family
ID=6438529
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1992/001149 WO1993004257A2 (de) | 1991-08-17 | 1992-05-22 | Bohrrohr |
Country Status (8)
Country | Link |
---|---|
US (1) | US5350024A (de) |
EP (1) | EP0553309B1 (de) |
JP (1) | JP3196850B2 (de) |
AT (1) | ATE135084T1 (de) |
AU (1) | AU653030B2 (de) |
CA (1) | CA2093138A1 (de) |
DE (1) | DE4127249C1 (de) |
WO (1) | WO1993004257A2 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0659975A2 (de) * | 1993-12-02 | 1995-06-28 | Nagaoka International Corporation | Bohrlochfilter mit regelmässigem Aussendurchmesser |
WO1996020331A1 (de) * | 1994-12-24 | 1996-07-04 | Reburg-Patentverwertungsgesellschaft Mbh | Verpressventil |
WO2002088511A1 (fr) * | 2001-04-26 | 2002-11-07 | Furukawa Co., Ltd. | Tige tubulaire a etages et machine de forage |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19503122B4 (de) * | 1995-02-01 | 2004-07-22 | Ibi Anker Gmbh | Injektionsanker |
GB9512250D0 (en) * | 1995-06-16 | 1995-08-16 | Boart Longyear Ltd | A drill string |
GB0002916D0 (en) * | 2000-02-10 | 2000-03-29 | Stable Services Ltd | Drill pipe torque reduction and protection apparatus |
DE102005042481A1 (de) * | 2005-09-07 | 2007-03-08 | Mkt Metall-Kunststoff-Technik Gmbh & Co. Kg | Ankerstange |
JP5890566B1 (ja) * | 2015-07-24 | 2016-03-22 | 信也 馬場 | 標識付きボーリングロッド及びこれを活用したボーリング孔軌跡修正法 |
CN109798142B (zh) * | 2019-03-25 | 2024-02-20 | 中铁第四勘察设计院集团有限公司 | 一种具有让压功能的可接式长锚杆 |
CN111648806B (zh) * | 2020-07-09 | 2021-05-14 | 中国科学院地质与地球物理研究所 | 一种伞状结构吸能锚杆装置 |
EP4249686A1 (de) * | 2022-03-22 | 2023-09-27 | BAUER Spezialtiefbau GmbH | Messmuffe und verfahren zum messen einer kraft in einem ankerpfahl |
CN116858512A (zh) * | 2023-06-13 | 2023-10-10 | 中煤科工开采研究院有限公司 | 用于巷道支护的试验装置与试验方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2318326A (en) * | 1940-03-08 | 1943-05-04 | Padley Leonard | Rock drill |
GB632556A (en) * | 1948-01-02 | 1949-11-28 | Atlas Diesel Ab | Improvements in couplings for rock drill bits or drill rods |
DE1170887B (de) * | 1957-11-20 | 1964-05-27 | Demag Ag | Gewindeverbindung fuer Bohrrohre |
DE3234406A1 (de) * | 1982-09-16 | 1984-03-22 | Joy Manufacturing Co., 15222 Pittsburgh, Pa. | Bohrstangenverbindung |
EP0274719A2 (de) * | 1987-01-13 | 1988-07-20 | Gd-Anker Gmbh | Verfahren zur Formung eines Gewindes und Rohrkörper mit Gewinde |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE933328C (de) * | 1953-10-13 | 1956-05-03 | Wilhelm Weghuber | Verfahren zum Verbinden von Gesteinsschichten mittels Gesteinsanker im Bergbau und Mittel zur Ausuebung des Verfahrens |
NO124947B (de) * | 1965-05-12 | 1972-06-26 | Ingersoll Rand Co | |
US4537428A (en) * | 1980-09-29 | 1985-08-27 | Hydril Company | Joint and joint components for pipe sections subjected to axial compression loads |
US4365678A (en) * | 1980-11-28 | 1982-12-28 | Mobil Oil Corporation | Tubular drill string member with contoured circumferential surface |
DE3828335C1 (de) * | 1988-08-20 | 1989-11-30 | Friedr. Ischebeck Gmbh, 5828 Ennepetal, De | |
DE3910627A1 (de) * | 1989-04-01 | 1990-10-04 | Ischebeck Friedrich Gmbh | Verbindungselement |
IT1229338B (it) * | 1989-05-04 | 1991-08-08 | Cbk Srl | Dispositivo di ancoraggio per il sostegno di scavi in roccia. |
-
1991
- 1991-08-17 DE DE4127249A patent/DE4127249C1/de not_active Expired - Fee Related
-
1992
- 1992-05-22 AU AU18837/92A patent/AU653030B2/en not_active Ceased
- 1992-05-22 WO PCT/EP1992/001149 patent/WO1993004257A2/de active IP Right Grant
- 1992-05-22 AT AT92911093T patent/ATE135084T1/de not_active IP Right Cessation
- 1992-05-22 CA CA002093138A patent/CA2093138A1/en not_active Abandoned
- 1992-05-22 JP JP51042692A patent/JP3196850B2/ja not_active Expired - Fee Related
- 1992-05-22 US US07/988,969 patent/US5350024A/en not_active Expired - Fee Related
- 1992-05-22 EP EP92911093A patent/EP0553309B1/de not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2318326A (en) * | 1940-03-08 | 1943-05-04 | Padley Leonard | Rock drill |
GB632556A (en) * | 1948-01-02 | 1949-11-28 | Atlas Diesel Ab | Improvements in couplings for rock drill bits or drill rods |
DE1170887B (de) * | 1957-11-20 | 1964-05-27 | Demag Ag | Gewindeverbindung fuer Bohrrohre |
DE3234406A1 (de) * | 1982-09-16 | 1984-03-22 | Joy Manufacturing Co., 15222 Pittsburgh, Pa. | Bohrstangenverbindung |
EP0274719A2 (de) * | 1987-01-13 | 1988-07-20 | Gd-Anker Gmbh | Verfahren zur Formung eines Gewindes und Rohrkörper mit Gewinde |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0659975A2 (de) * | 1993-12-02 | 1995-06-28 | Nagaoka International Corporation | Bohrlochfilter mit regelmässigem Aussendurchmesser |
EP0659975A3 (de) * | 1993-12-02 | 1997-03-12 | Nagaoka Kk | Bohrlochfilter mit regelmässigem Aussendurchmesser. |
WO1996020331A1 (de) * | 1994-12-24 | 1996-07-04 | Reburg-Patentverwertungsgesellschaft Mbh | Verpressventil |
WO2002088511A1 (fr) * | 2001-04-26 | 2002-11-07 | Furukawa Co., Ltd. | Tige tubulaire a etages et machine de forage |
Also Published As
Publication number | Publication date |
---|---|
JP3196850B2 (ja) | 2001-08-06 |
AU653030B2 (en) | 1994-09-15 |
JPH06501072A (ja) | 1994-01-27 |
WO1993004257A3 (de) | 1993-04-01 |
EP0553309A1 (de) | 1993-08-04 |
CA2093138A1 (en) | 1993-02-18 |
AU1883792A (en) | 1993-03-16 |
ATE135084T1 (de) | 1996-03-15 |
DE4127249C1 (de) | 1993-02-04 |
EP0553309B1 (de) | 1996-03-06 |
US5350024A (en) | 1994-09-27 |
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