EP2801460B1 - Trépan doté d'éléments de nettoyage de trou de forage pour forer et nettoyer un trou de forage - Google Patents

Trépan doté d'éléments de nettoyage de trou de forage pour forer et nettoyer un trou de forage Download PDF

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Publication number
EP2801460B1
EP2801460B1 EP14165833.6A EP14165833A EP2801460B1 EP 2801460 B1 EP2801460 B1 EP 2801460B1 EP 14165833 A EP14165833 A EP 14165833A EP 2801460 B1 EP2801460 B1 EP 2801460B1
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EP
European Patent Office
Prior art keywords
borehole
drilling
drill
drill bit
cleaning elements
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP14165833.6A
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German (de)
English (en)
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EP2801460A1 (fr
Inventor
Herbert Reuther
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuerth International AG
Adolf Wuerth GmbH and Co KG
Original Assignee
Wuerth International AG
Adolf Wuerth GmbH and Co KG
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Publication date
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Publication of EP2801460A1 publication Critical patent/EP2801460A1/fr
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Publication of EP2801460B1 publication Critical patent/EP2801460B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D7/00—Accessories specially adapted for use with machines or devices of the preceding groups
    • B28D7/02—Accessories specially adapted for use with machines or devices of the preceding groups for removing or laying dust, e.g. by spraying liquids; for cooling work

Definitions

  • the invention relates to a drill for drilling and cleaning a borehole, a drilling assembly, a method for drilling and cleaning a borehole and a use.
  • a hollow drill is provided with at least one hole in the drill behind the drill bit, can be sucked through the drilling dust with a vacuum cleaner immediately after its emergence. However, if necessary, the drill hole must then be brushed with a brush to achieve a clean bond or attachment with the help of a chemical anchor.
  • DE 39 19 095 A1 discloses a rock drill from a drill bit, a clamping shaft and an intermediate conveyor spiral.
  • the conveyor coil has helically or spirally arranged brushing members for cleaning the borehole of drill dust.
  • the brushing members may be bristle bundles and / or elongated strip brushes.
  • the effective one Outer diameter of the brush elements extends at least to the drill nominal diameter.
  • DE 197 57 424 A1 discloses a device for well cleaning, which is introduced into a previously created in a subsoil wellbore.
  • a tubular shaft is inserted at a male end into a tool holder of a drill.
  • a cavity in the shaft opens into the wellbore at an opposite end.
  • the shaft has an opening in the region of the insertion end as an air access.
  • the shaft is equipped with brushing devices in the form of plastic bristles which extend radially to the borehole wall.
  • a pot-shaped suction head is provided with a passage opening for the shaft and connected to the shaft accordingly.
  • the suction head has a connection for a vacuum cleaner, which is connected via a hose.
  • the device To drill hole cleaning the device is inserted into the tool holder of the drill and introduced into the hole. As the shaft rotates through the drilling tool, the brushing members strip off the debris adhering to the borehole wall. By the negative pressure generated by the vacuum cleaner air is sucked through the opening, which exits at the mouth and promotes the drilling dust to the suction head.
  • DE 10 2010 063 859 A1 discloses a tool for cleaning a wellbore having a tool shank and a conveying element for removing drilling dust from the wellbore.
  • the conveying element is attached to the tool shaft and arranged in the axial direction helically around the tool shaft.
  • the operations of drilling a wellbore and cleaning it from accumulated drilling dust may be combined into a single operation.
  • This can be achieved by providing not only a drilling section for the removal of substrate material (for example by means of hammering, scraping and / or chiselling) while producing drilling dust or drill dust, but also drill hole cleaning elements which are formed when the drill is withdrawn automatically make a brush-like cleaning of the borehole of drilling dust or drilling dust from the well, for example, without the need for a separate operation is required.
  • the flexibility or elasticity of the radially projecting well cleaning elements allows insertion of the drill into the well without undue effort, while the well cleaning elements but also equal to the borehole wall biased or pressed against this under bending.
  • the drill section may have a drill bit with adjoining drill edges for (in particular hammering) removal of material from the substrate.
  • the drill bit tip can loosen material, especially concrete material, of the ground.
  • Optional drill edges which may extend from the drill bit towards the shank portion, can then contribute to the grinding or removal of the drill meal.
  • drill edges can perform a kind of leadership function and support a scraping of the material of the substrate.
  • the drilling section can be designed differently, depending on the underground material to be drilled, as is known to the person skilled in the art.
  • the wellbore cleaning elements may be formed as bristles that together form a type of brush.
  • the well treatment elements may be formed as a plurality (for example at least 10, in particular at least 30, more particularly at least 100) of, for example, metallic wires or bristles which extend radially from the shank portion and bear against the borehole wall.
  • the number and thickness of the well cleaning elements may be appropriately selected depending on the size of the drill.
  • At least a part of the well cleaning elements may be formed as slats extending in particular in the axial direction.
  • Such fins may for example be made of flexible fabric, rubber or plastic material and form one or more lips which are linearly and continuously adjoining a borehole wall to the movement of the drill Drill down hole to clean and remove this possibly from the wellbore.
  • the shank portion may have an annular groove and the well cleaning elements may be mounted radially outwardly on a ring, the ring being permanently inserted into the annular groove on the shank portion (for example by shrinking, or releasably, for example by means of elastic coating ) fastened or attached.
  • the ring can be formed of a flexible or elastic material such as plastic or rubber and can thus be over the shank portion or over the drill section to be pulled, and then to lock in the annular groove. After wear of the wellbore cleaning elements, the ring can be easily replaced by being withdrawn from the annular groove and replaced with another ring with wellbore cleaning elements.
  • a simple one-piece production of drill section and shaft portion is possible because then no integral with the drill hole cleaning elements drill must be formed, in which the drill hole cleaning elements with different hardness properties should be formed compared to drill section and shaft portion.
  • the wellbore cleaning elements may be grouped into a plurality of well-spaced and non-contiguous wellbore purification element groups.
  • a plurality of axially spaced apart annular, in particular annular, Bohr lendersselement phenomenon may be provided.
  • a free receiving volume for the transportable drilling dust can be formed between closed brush structures, which favors the removal of the drilling dust from the borehole.
  • the wellbore cleaning elements may orbit helically or helically about the shaft portion. Also in this way is a particularly efficient removal of drilling dust from the well as the drill meal can then be conveyed along an uninterrupted helical path from the well interior to and from the wellbore mouth.
  • the provision of spirally arranged well cleaning elements is also suitable for providing a plurality of such spiral-shaped structures in a space-saving manner separately from one another (for example parallel to one another), which additionally promotes efficient cleaning of the borehole.
  • the shank portion may include at least one helical coil (ie, a helix raised from the shank core), wherein the well cleaning elements spirally rotate on at least one of the at least one coil.
  • helical coil ie, a helix raised from the shank core
  • grooves may be arranged along the helix for receiving end portions of the wellbore cleaning elements. Recesses are then formed between adjacent spirals, along which the drilling dust can be removed efficiently and guided.
  • the shank portion may include at least two helical coils, wherein the well cleaning elements are spirally orbited between two adjacent helices. The coils themselves can then remain free from well cleaning elements. According to this embodiment, depressions formed between adjacent coils (in which receiving grooves may be formed in turn) may be used to receive end portions of the well treatment elements.
  • the drill may have a sleeve which can be plugged over the shaft portion (for example, elastically plugged or shrinkable) and on the inside of the shaft portion attachable and on the outside of the hole cleaning elements are provided.
  • a sleeve can be, for example, a hose made of plastic, rubber or a metallic material, which can be replaced as an exchange or replacement part, for example, if the well cleaning elements are worn. Both the assembly and disassembly of such a sleeve is intuitive and easy even for an untrained user.
  • the shank portion and the well cleaning elements may be integrally formed.
  • shaft portion and well cleaning elements are integral and thus inseparable from each other. This allows a particularly mechanically strong connection of the drill hole cleaning elements with the base of the drill and thus represents a particularly robust embodiment.
  • the hardness properties of drill section and shaft section on the one hand and the well cleaning elements on the other can be set differently.
  • the drill section should have a particularly high hardness for drilling hard surfaces, such as concrete, and can therefore be subjected to a specific hardening process.
  • the borehole cleaning elements for cleaning the borehole should have a flexible property and thus a reduced hardness, which can be effected by a selective aftertreatment of the wellbore cleaning elements on the shaft section, for example by controlled heating or a suitable heat treatment and cooling.
  • the entire surface of the shaft portion may be provided with wellbore cleaning elements.
  • the shank portion may be free of areas that are free of wellbore cleaning elements, whereby a surface brush may be formed. This allows a full-surface and thus particularly efficient cleaning of the borehole wall.
  • the drill in addition to the wellbore cleaning elements, has a hollow channel having a first front outlet opening on the drill section and a second rear exit opening on the shaft section, the second outlet opening being coupled to a suction device for sucking the drill meal out of the borehole, preferably during drilling and / or during cleaning.
  • a suction device for sucking the drill meal out of the borehole, preferably during drilling and / or during cleaning.
  • the shank portion may taper from the drill portion towards the borehole exterior, that is, its core diameter may be successively reduced.
  • the shank of the drill or the entire drill can be wedge-shaped.
  • the grain or powdery material such as drilling dust or drilling dust, can be transported along an outwardly increasing channel. Due to the described geometry, in addition to a dynamic reinforcing effect on extraction of the drill dust, since the distance between the borehole wall and the lateral surface of the drill increases toward the borehole exterior.
  • the well cleaning elements of the shaft portion can be made removable and thus exchangeable. Then it is possible, for example, after wear or tear of the drill hole cleaning elements or to install the most suitable for certain cleaning tasks drill hole cleaning elements replace the latter.
  • wellbore cleaning elements and shank portion may be integrally provided.
  • co-rolling of the brushes can also take place during rolling of the drill.
  • the shaft portion is preferably mechanically highly stable and the well cleaning elements should preferably be highly elastic.
  • These sectionally different material properties of the drill can be achieved, for example, by selectively hardening the shaft section including the drill section, while leaving the well cleaning elements free from hardening.
  • the shank section including the drill section and the well cleaning elements can be subjected to a common hardening process Subsequently, the well cleaning elements are selectively softened, for example by an annealing treatment.
  • the shank portion and the well cleaning elements cooperating fasteners for particular positive (or frictionally) or fastened to each other.
  • the attachment should allow sufficient holding force to withstand the usual mechanical stresses during drilling and brushing of the borehole. For example, gluing, soldering, welding or pinching the well cleaning elements in grooves on the shaft portion is possible. It is also possible to produce a tongue and groove connection, a screw connection, a bayonet connection, a snap connection or a dovetail connection between the shank section and a support structure of the wellbore cleaning elements or the wellbore purification elements themselves.
  • the drilling assembly comprises a suction device for extracting drill dust from the borehole during drilling and / or during cleaning.
  • a suction device for extracting drill dust from the borehole during drilling and / or during cleaning.
  • Such a peristaltic vacuum can make it possible to suck a portion of the drill dust from the well and dispose of safely.
  • the Bohrstaubsauger can be at least partially provided as part of the drill or thus in one piece.
  • the drill vacuum cleaner is a separate component from the drill. For sucking down borehole dust, a suitable supply air opening can be provided.
  • the drilling assembly may comprise an auxiliary body for laying on the ground, wherein in the auxiliary body, a first receiving opening for receiving the drill to the ground and a second receiving opening, which is preferably connected to the first receiving opening, for operatively connecting the Suction device with the drill hole to be drilled are provided.
  • a particularly safe disposal of the drill dust is possible.
  • a user sets the auxiliary body directly on the substrate to be drilled and then drilled through the first receiving opening by means of the drill hole in the ground.
  • a second receiving opening is connected to the Bohrstaubsauger, which sucks at least a portion of the resulting drill dust during the drilling process and thus disposed of.
  • the wellbore may be cleaned by axial (ie, along the direction of drilling) and / or radial (ie, circumferentially of the drill) movement of the wellbore cleaning elements along the wellbore, without drilling (FIG. that is to say, readily convert material of the subsoil into drilling dust).
  • the drill is simply pulled out of the borehole at the back.
  • the bristles or other drill hole cleaning elements slide along the borehole wall and clean them of remaining drilling dust.
  • drilling dust detached from the borehole wall is simultaneously removed from the borehole.
  • the stroke in this cleaning movement may comprise either the entire distance between the wellbore deepest and the well mouth, or only a portion of it, optionally with or without the use of a suction device.
  • the borehole can be drilled to a desired depth, in particular to a borehole deepest, and be moved at least once, in particular several times, starting from the nominal depth in the direction of the borehole mouth, after reaching the desired depth of the drills for at least partial removal of the drilled meal from the borehole ,
  • a and moving the drill bit between the wellbore bottom and the wellbore mouth is an effective means to clean the wellbore approximately completely of drill dust, optionally with or without the use of an aspirator.
  • the drill may be rotated (in particular, continued or continued), even if drilling is discontinued.
  • This rotation can take place, for example, at 1000 to 3000 revolutions / min, in particular at 1500 to 2000 revolutions / min.
  • drilling may be initially performed, then the drill may be stopped and subsequently the borehole cleaned by moving the drill along the borehole by brushing.
  • the drilling dust may be extracted from the wellbore.
  • the synergistic interaction of a suction and a brushing process, a particularly clean hole can be achieved.
  • the extraction of drilling dust also increases operational safety, as it effectively protects an operator from drilling dust.
  • the drill for example, a hammer drill
  • the drill bit is preferably made of high speed high speed steel (HSS).
  • the drill bit may thus be an HSS drill bit or alternatively a diamond drill bit.
  • the drill shank is made of HSS or high-strength steel, for example.
  • the drill has at least one turn of a drilling spiral on a rear side of the drill bit, preferably two or three or more than three drill screws. At a back of the drill bit and possibly the drill spiral, a tapering of the diameter takes place, which is then constant over the remaining length, whereby a straight shank portion is formed, for example.
  • the particular smooth shaft portion serves to arrange on this brush elements.
  • a fabric or plastic tube projecting from the bristles radially outwards, pulled over the particular smooth shaft portion and preferably fastened by means of fastening means on the shaft portion to prevent it from slipping relative to the drill.
  • the hose can be a fabric or plastic hose or a metal hose.
  • the drill bit When drilling with the drill, the drill bit generates the propulsion in the material.
  • the brush elements engaging thereafter convey the drill meal in the direction of the borehole, on the one hand, and loosen the drill dust from the borehole wall on the other hand.
  • a vacuum cleaner can be arranged, which sucks the Bohrmehl.
  • a suction head adapter is preferably provided, which is attached to the suction hose of the nipple and through which the drill extends in order to fully suck the drilling dust out of the borehole.
  • the drill consists of at least two components: a drill bit with subsequent attachment means and a shaft with optional detachable brush elements.
  • the drill bit can be fastened to the shaft by means of the fastening means, for example screwed on.
  • Brush elements can be mounted in or on the shaft (for example in the manner of a tongue and groove connection).
  • the latching means can also be realized by means of a hole and a knob instead of a tongue and groove.
  • the brush elements each form a circumferential spiral to efficiently convey the drill meal out of the wellbore.
  • annular groove can be provided in the tip of the drill into which a ring with brush elements can be interchangeably inserted.
  • the drill bit Upon reaching the desired wellbore depth, the drill bit is axially reciprocated to release the drilling dust from the wellbore, with the drilling dust extraction continuing.
  • the drill may be rotated slightly to assist brushing.
  • the drill bit projects radially beyond the shaft to locate the brush elements therein.
  • Fig. 1 to Fig. 6 13 show different views of a drilling assembly 150 and a substrate 102 to be drilled during a method of drilling and cleaning a wellbore 200 and subsequently anchoring an anchoring member 600 in the drilled wellbore 200 in accordance with an exemplary embodiment of the invention.
  • Fig. 1 is the drilling assembly 150 for drilling and cleaning the in Fig. 2 shown borehole 200 in a concrete wall as a substrate 102 according to an exemplary embodiment of the invention.
  • the drilling arrangement 150 has a drill 100, which will be described in more detail below.
  • the drill 100 is according to Fig. 1 received by a drill 152. More specifically, a chuck of the drill 152 rotatably receives a free end of a shank portion 110 of the drill 100 so as to rotationally drive the drill 100 by driving the drill 152. This is in Fig. 1 schematized with a rotation arrow 130.
  • the drill 100 is designed to drill and clean the borehole 200 in the substrate 102. It has an end drill section 104 with a drill bit 114 and adjoining drill edges 106 for removing material from the substrate 102.
  • the drill section 104 is configured to remove concrete material from the substrate 102 to form drill cuttings for drilling the wellbore 200.
  • the drilling section 104 is adjoined immediately by the shank section 110 which has been designed in the described exemplary embodiment, from which part of its lateral surface with flexible metal bristles 112 protruding radially beyond its solid core for brushing the borehole 200 by means of removing drilled mortar 202 from the borehole 200 Is provided.
  • the drilling assembly 150 further comprises a suction device 118.
  • This cooperates with the drill 100 and with an auxiliary body 120.
  • the auxiliary body 120 which is substantially shaped, for example, like a pack of cigarettes, is placed on the wall 102 prior to drilling the borehole 200 and optionally fixed there.
  • a first receiving opening 122 for receiving the drill 100 from an external position to a surface of the substrate 102 to be drilled is formed.
  • An appropriate insertion direction is in Fig. 1 schematized with an arrow 132.
  • a second receiving opening 124 connected to the first receiving opening 122 is formed is designed to operatively connect the suction device 118 with the borehole 200 to be drilled.
  • the borehole 200 can be formed in the substrate 102, producing concrete drilling meal. This is sucked through a portion of the first receiving opening 122 and through the second receiving opening 124 of the suction device 118 and into a in Fig. 1 Not shown container disposed of, so that an operator is safely protected from the potentially harmful debris 202.
  • Fig. 1 now shows the drilling assembly 150 in a state just before the rotary driven drill 100 is inserted into the first receiving opening 122 to start drilling the borehole 200 after contacting the surface of the substrate 102.
  • FIG. 12 shows the drilling assembly 150 in a later state in which the tip 114 of the drill 100 has reached the lowest depth of the well corresponding to a predetermined target depth and therefore the wellbore 200 is fully formed.
  • Drilling dust 202 located in the borehole 200 is extracted by means of the suction device 118, wherein a suction direction is indicated by an arrow 208.
  • the flexible or resilient metal bristles 112, as they project radially beyond the core of the drill 100, are forcefully pressed against the borehole wall of the borehole 200 along their full circumferential extent.
  • suction device 118 removes a significant portion of the drilling dust 202 during drilling, residual drilling dust 202 may still remain on the borehole wall.
  • FIG. 12 shows the drilling assembly 150 in a still later state in which, by merely retracting the drill 100 from the wellbore 200, the wellbore wall of the wellbore 200 is cleaned of remaining debris 202 by the metal brushes 112.
  • the retraction of the drill 100 is in Fig. 3 schematized with an arrow 300.
  • the metal bristles 112 vividly grind along the borehole wall and pull therefore remaining debris 202 out of the wellbore 200. This cleaning of the borehole wall can be additionally supported by the suction device 118.
  • the drill 100 remains in place during the retraction according to Fig. 3 in the rotating state, it can be additionally reinforced by the cleaning effect of the then rotating metal bristles 112.
  • the drive of the drill 152 and / or the suction device 118 can also be switched off.
  • the cleaning of the well 200 can be further improved.
  • Fig. 4 shows the remaining and cleaned wellbore 200 in the subsurface 102 after the drilling assembly 100 has been completely removed.
  • the wellbore 200 thus cleaned may then be used in combination with a chemical dowel to receive and anchor an anchoring element 600 to the substrate 102. This is in Fig. 5 and Fig. 6 and will be described in more detail below.
  • a suitable amount of a curable curing material 502 is introduced into the borehole 200 with a metering device 500.
  • the anchoring element 600 introduced into the partially filled wellbore 200 and the hardenable curing material 502 then cured. Since the wellbore 200 has been cleanly cleared of debris 202 by virtue of the combination of the suction device 118 and the bristles 112 attached to the drill 100, the anchoring force of the chemical anchor is in Fig. 6 extraordinarily high.
  • Fig. 7 10 shows a drill 100 according to another exemplary embodiment of the invention having annular and radially outwardly extending metal bristles 112 as wellbore cleaning elements for drilling and cleaning a wellbore 200.
  • the shaft portion 110 has helical coils 700 running parallel to one another, between each of which a recess 704 is formed.
  • the drilling dust 202 produced during the drilling operation can be discharged outward along the recesses 704 if drilling dust is extracted during drilling by means of a suction device 118 and / or by means of the metal bristles 112 drilling dust 202 is removed from the borehole wall.
  • a free end of the shank portion 110 forms a clamping portion 706 for clamping the drill 100 into a chuck of a drill 152.
  • the metal bristles 112 are attached to a circumferential brush member 702 provided separately from the shaft portion 110.
  • the brush member 702 has as shown in more detail in FIG Fig. 9 is shown, a rubber ring 900, on the outer circumference, the metal bristles 112 are immobilized pointing radially outward.
  • Fig. 8 shows a front portion of the drill 100 according to Fig. 7 with an annular groove 800 for receiving the in Fig. 9
  • the ring member 702 can thus be mounted on the shaft portion 110 by the elastic rubber ring 900 is positively received in the annular groove 800.
  • the length of the metal bristles 112 is sized to project radially, for example, 1 mm to 3 mm beyond the bore portion 104 when the ring 900 is received in the annular groove 800.
  • the shaft portion 110 As in Fig. 8 shown, provided with the annular groove 800.
  • the metal bristles 112 are pointing radially outward at the in Fig. 9 shown elastic rubber ring 900 is attached.
  • the rubber ring 900 By inserting the rubber ring 900 into the annular groove 800, the metal bristles 112 on the shaft portion 110 and thus on the drill 100 fixable.
  • This configuration allows a fully annular hole cleaning.
  • a simple replacement of the metal bristles 112 is possible, since after wear thereof only the ring 900 with the metal bristles 112 attached thereto needs to be replaced.
  • the ring 900 located in the wellbore region travels a long way to the wellbore, effectively cleaning a large surface area of the wellbore wall.
  • Fig. 10 shows a front portion of a drill 100 according to another exemplary embodiment of the invention with a formed between two axially spaced annular ribs 1002 on the shaft portion 110 annular recess 1000 for receiving the in Fig. 9 shown ring 900 with the radially arranged metal bristles 112.
  • Fig. 10 shows that for receiving the ring 900 on the shank portion 110 substantially any fastening means can be formed, which preferably form-fitting receive the ring 900 and prevent release of the ring 900 of the fastening means at the forces incurred during the drilling or cleaning forces.
  • Fig. 11 to Fig. 15 show drills 100 with well cleaning elements 112 in accordance with other exemplary embodiments of the invention.
  • the entire shaft portion 110 is covered with metal bristles 112 or other brush elements.
  • metal bristles 112 or other brush elements.
  • a cylindrical or tubular tube 1100 is pulled over the shaft portion 110 and holds there preferably non-positively.
  • the metal bristles 112 are attached on an outer side of the tube 1100, directed radially outwards in a ring shape.
  • a rear surface 1102 of a drill bit formed, for example, as a diamond segment as a drill section 104 serves as a stop for the front end of the tube 1100.
  • the tube 1100 can be made of plastic, rubber or metal or be designed as a fabric. It can have any desired contour and should be configured to be able to fasten brush elements on the outside.
  • the shank portion 110 and the drill portion 104 may be integrally provided, or the shank portion 110 and the drill portion 104 may be formed as separate but interconnectable (eg, screw-together) components.
  • the well cleaning elements are mounted as metal bristles 112 on an outer surface of a helical coil 700 of the shaft portion 110.
  • the drill meal 202 may then be removed along depressions 704 between adjacent coils 702 along a helical trajectory.
  • the well cleaning elements are mounted as metal bristles 112 in recesses 704 between adjacent helical coils 700 of the shaft portion 110.
  • the brush elements 112 may be accommodated protected from excessive mechanical stress in interspaces between drill coils 700.
  • Fig. 14 shows a drill 100 according to yet another exemplary embodiment of the invention, in which as a hole cleaning elements rubber blades 112 are partially mounted circumferentially on the shaft portion 110 and around it.
  • rubber blades 112 are partially mounted circumferentially on the shaft portion 110 and around it.
  • 700 longitudinal grooves can be formed on the helices, in which the rubber blades 112 inserted and optionally glued or clamped.
  • a drill 100 according to another exemplary embodiment of the invention is shown in which, similar to FIG Fig. 11 a tube 1100 is overlapped with externally attached metal bristles 112.
  • the tube 1100 is attached to a portion of the shaft portion 110 in which coils 700 and recesses 704 interposed therebetween are formed.
  • a rear end portion 1500 of the drill 100 associated with a drill bit (not shown) is free of coils 700, depressions 704, and tube 1100.
  • Fig. 16 and Fig. 17 show assemblies 150 including a drill 100 having well cleaning elements 112 and a debris removal device 118 for drilling and cleaning a wellbore 200 in accordance with exemplary embodiments of the invention.
  • a plurality of axially and radially spaced-apart surface regions of the shaft portion 110 are provided with metal bristles 112.
  • the distances or spaces between the metal bristles 112 allow for the extraction of drill dust irrespective of the presence of the metal bristles 112 during the drilling operation by means of the drilling dust extraction device 118.
  • FIG. 17 For example, an assembly 150 with a drill 100 according to another exemplary embodiment is shown. Similar to in FIGS. 7 to 10 In an annular groove 800 at a front end of the shaft portion 110, a ring 900 is inserted with outwardly projecting metal bristles 112 for cleaning the borehole 200. According to this embodiment, the suction device 118 is now integrated in the drill 152. In the embodiment shown, an exit hole 1702 is formed in a front portion of the drill 100, which is connected to a Bohrmehlkanal 1700 inside the drill 100. A back end of the drilling mud channel 1700 is coupled to the suction device 118 via a hose 1706 or the like for sucking away debris 202 during the drilling operation.
  • the suction device 118 sucks already during the drilling of the borehole 200 by means of the drill section 104 of the drill 100 formed drilling dust 202 through the outlet opening 1702, the Bohrmehlkanal 1700 and the tube 1706 from.
  • mere extraction of the drill 100 from the wellbore 200 results in additional cleaning of the wellbore wall without the need for a separate cleaning device from the drill 100.
  • Fig. 17 shows a dynamic reinforcement effect can be achieved during the suction of the drilling dust 202, with which the well cleaning can be further improved.
  • Drills according to exemplary embodiments of the invention can be used, for example, for drilling into a solid material, such as concrete or sand-lime brick.
  • a solid material such as concrete or sand-lime brick.
  • drills according to exemplary embodiments for hollow bricks in which the webs are large and the chambers are small, so that a large part of the volume accounts for the webs.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Claims (15)

  1. Foret (100) destiné à percer et nettoyer un trou (200) percé dans un support (102), notamment du béton, le foret (100) comportant :
    un tronçon de perçage (104) d'extrémité pour enlever de la matière du support (102) en formant de la poussière de perçage (202), pour percer le trou (200) ;
    un tronçon de tige (110), se raccordant sur le tronçon de perçage (110), avec des éléments de nettoyage (112) souples du trou percé, débordant au moins par partie, en direction radiale par-dessus le tronçon de perçage (104), pour retirer au moins une partie de la poussière de perçage (202) hors du trou (200) percé ;
    caractérisé en ce que
    le foret (100) comporte un canal creux (1700) qui comporte un orifice de sortie (1702) avant sur le tronçon de perçage (104) et un orifice de sortie arrière, notamment sur le tronçon de tige (110), l'orifice de sortie arrière étant couplé ou susceptible d'être couplé avec un système d'aspiration (118), qui est conçu pour aspirer la poussière de perçage (202) hors du trou (200) percé, de préférence pendant le perçage et/ou pendant le nettoyage.
  2. Foret (100) selon la revendication 1, le tronçon de perçage (104) comportant une pointe de perçage (114) avec des arêtes de perçage (106) qui s'y raccordent, pour l'enlèvement notamment par martelage de matière du support (102).
  3. Foret (100) selon la revendication 1 ou la revendication 2, les éléments de nettoyage (112) du trou percé comportant des poils, notamment des poils métalliques, qui en commun forment une brosse.
  4. Foret (100) selon l'une quelconque des revendications 1 à 3, les éléments de nettoyage (112) du trou percé comportant des lamelles, notamment des lamelles en matière plastique.
  5. Foret (100) selon l'une quelconque des revendications 1 à 4, les éléments de nettoyage (112) du trou percé étant placés en périphérie, en forme de spirale autour du tronçon de tige (110).
  6. Foret (100) selon la revendication 5, le tronçon de tige (110) comportant au moins une hélice (700) spiroïdale, au moins une partie des éléments de nettoyage (112) du trou percé étant placée en périphérie, en forme de spirale, notamment sur au moins l'une de l'au moins une hélice (700).
  7. Foret (100) selon la revendication 5 ou la revendication 6, le tronçon de tige (110) comportant au moins deux hélices (700) spiroïdales, au moins une partie des éléments de nettoyage (112) du trou percé étant placée en périphérie, en forme de spirale dans ou entre deux hélices (700) voisines.
  8. Foret (100) selon l'une quelconque des revendications 1 à 7, présentant au moins l'une des caractéristiques suivantes :
    le foret (100) comporte une douille (1100), notamment élastique, qui peut s'enficher par-dessus le tronçon de tige (110) et sur sa face intérieure peut se fixer sur le tronçon de tige (110) et sur la face extérieure de laquelle sont prévus les éléments de nettoyage (112) du trou percé ;
    le tronçon de tige (110) et des éléments de nettoyage (112) du trou percé sont conçus notamment en commun en monobloc avec le tronçon de perçage (104) ;
    l'ensemble de la surface du tronçon de tige (110) est munie d'éléments de nettoyage (112) du trou percé ;
    le tronçon de tige (110) se rétrécit à partir du tronçon de perçage (104), en direction de l'extérieur du trou percé ;
    les éléments de nettoyage (112) du trou percé sont conçus en étant amovibles du tronçon de tige (110) et ainsi interchangeables ;
    le tronçon de tige (110) et les éléments de nettoyage (112) du trou percé comportent des systèmes de fixation coopérants, pour la fixation, notamment par complémentarité de forme l'un à l'autre ;
    le tronçon de tige (110) comporte une rainure annulaire (800) et les éléments de nettoyage du trou percé comportent des poils (1112), montés en direction radiale sur une bague (900), notamment élastique, la bague (900) étant susceptible d'être fixée ou fixée par introduction dans la rainure annulaire (800) sur le tronçon de tige (110) ;
    les éléments de nettoyage (112) du trou percé sont groupés en groupes d'éléments de nettoyage du trou percé écartés les uns des autres dans l'espace et non cohérents les uns avec les autres.
  9. Agencement de perçage (150) destiné à percer et à nettoyer un trou (200) percé dans un support (102), l'agencement de perçage (150) comportant :
    un foret (100) selon l'une quelconque des revendications 1 à 8, pour percer et nettoyer le trou (200) percé dans le support (102), notamment du béton ;
    une perceuse (152), destinée à recevoir le tronçon de tige (110) du foret (100) et à entraîner en rotation le foret (100) ;
    un système d'aspiration (118), destiné à aspirer de la poussière de perçage (202) hors du trou (200) percé pendant le perçage et/ou pendant le nettoyage.
  10. Agencement de perçage (150) selon la revendication 9, comportant un organe auxiliaire (120) destiné à être placé sur le support (102), dans l'organe auxiliaire (120) étant prévus un orifice (122) de réception du foret, destiné à faire passer le foret (100) jusqu'au support (102) et un orifice (124) de réception d'aspiration pour la liaison active du système d'aspiration (118) avec le trou (200) qui doit être percé.
  11. Procédé destiné à percer et à nettoyer un trou (200) percé dans un support (102), le procédé comportant :
    le perçage du trou (200) percé à l'aide d'un foret (100) selon l'une quelconque des revendications 1 à 8, par enlèvement de matière du support (102), en formant de la poussière de perçage (202), à l'aide du tronçon de perçage (104) côté extrémité du foret (100) ;
    le retrait d'au moins une partie de la poussière de perçage (202) hors du trou (200) percé, à l'aide des éléments de nettoyage (112) souples du trou percé débordant en direction radiale par-dessus le tronçon de perçage (104), qui sont montés au moins en partie sur le tronçon de tige (110) se raccordant sur le tronçon de perçage (104) du foret (100) ;
    pendant au moins une partie du procédé, la poussière de perçage (202) étant aspirée hors du trou (200) percé.
  12. Procédé selon la revendication 11, pendant une partie du procédé, le trou (200) percé étant nettoyé à l'aide d'un déplacement axial et/ou radial des éléments de nettoyage (112) du trou percé, le long du trou (200) percé, en retirant la poussière de perçage (202), sans aspirer.
  13. Procédé selon la revendication 11 ou la revendication 12, le trou (200) percé étant percé jusqu'à une profondeur de consigne, notamment jusqu'à la profondeur extrême du trou percé et après l'atteinte de la profondeur de consigne, pour retirer au moins en partie la poussière de perçage (202) hors du trou (200) percé, le foret (100) étant déplacé au moins une fois, notamment plusieurs fois, en partant de la profondeur de consigne, en direction de l'embouchure (300) du trou percé.
  14. Procédé selon la revendication 13, pendant le déplacement, le foret (100) étant tourné.
  15. Utilisation d'un foret (100) selon l'une quelconque des revendications 1 à 8 ou d'un agencement de perçage (150) selon l'une quelconque des revendications 9 ou 10, pour percer un trou (200) et pour nettoyer au moins en partie le trou (200) percé de la poussière de perçage (200) à l'aide des éléments de nettoyage (112) du trou percé.
EP14165833.6A 2013-04-26 2014-04-24 Trépan doté d'éléments de nettoyage de trou de forage pour forer et nettoyer un trou de forage Not-in-force EP2801460B1 (fr)

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DE102013207661.4A DE102013207661A1 (de) 2013-04-26 2013-04-26 Bohrer mit Bohrlochreinigungselementen zum Bohren und Reinigen eines Bohrlochs

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EP2801460B1 true EP2801460B1 (fr) 2017-08-30

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DE102016117687A1 (de) 2016-09-20 2018-03-22 Drebo Werkzeugfabrik Gmbh Bohrlochreinigungsvorrichtung
CN113482573A (zh) * 2021-07-13 2021-10-08 中国铁建电气化局集团有限公司 打孔粉尘回收系统
CN115213147B (zh) * 2022-08-03 2024-05-17 中建八局第一建设有限公司 一种建筑预留孔清理装置

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DE3919095A1 (de) * 1988-07-16 1990-01-18 Hawera Probst Kg Hartmetall Bohrwerkzeug
DE4139603A1 (de) * 1991-11-30 1993-06-03 Hilti Ag Staubabsaugung fuer bohr- und meisselgeraete
JP3706464B2 (ja) * 1997-08-14 2005-10-12 Ｊｆｅスチール株式会社 オーガー装置及び根固め方法
DE19757424A1 (de) * 1997-12-23 1999-06-24 Hilti Ag Vorrichtung zur Bohrlochreinigung
DE10223072A1 (de) * 2002-05-24 2004-05-06 KLEIN, Rüdiger Werkzeugintegrierte Materialaufnahme an Werkzeugen und Maschinen für Bohr-, Säge-, Schneid-, Trennarbeiten und spanabhebende Verformungen
DE202007011431U1 (de) * 2007-08-16 2007-11-29 Duchzick, Harald Elektrowerkzeugmaschine
DE102008001908A1 (de) * 2008-05-21 2009-11-26 Hilti Aktiengesellschaft Vorrichtung zur Bohrlochreinigung
DE102010063859A1 (de) * 2010-12-22 2012-06-28 Hilti Aktiengesellschaft Werkzeug und Verfahren zum Reinigen eines Bohrlochs

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DE102013207661A1 (de) 2014-10-30

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