EP2703596A1 - Drilling device and method for producing a borehole - Google Patents

Drilling device and method for producing a borehole Download PDF

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Publication number
EP2703596A1
EP2703596A1 EP12006182.5A EP12006182A EP2703596A1 EP 2703596 A1 EP2703596 A1 EP 2703596A1 EP 12006182 A EP12006182 A EP 12006182A EP 2703596 A1 EP2703596 A1 EP 2703596A1
Authority
EP
European Patent Office
Prior art keywords
drilling
support tube
receptacle
soil material
cutting device
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.)
Granted
Application number
EP12006182.5A
Other languages
German (de)
French (fr)
Other versions
EP2703596B1 (en
Inventor
Stefan Michael Finkenzeller
Jürgen Klippenstein
Leonhard Weixler
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.)
Bauer Maschinen GmbH
Original Assignee
Bauer Maschinen GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bauer Maschinen GmbH filed Critical Bauer Maschinen GmbH
Priority to EP12006182.5A priority Critical patent/EP2703596B1/en
Priority to CN201380045727.5A priority patent/CN104619945B/en
Priority to US14/424,993 priority patent/US20150322737A1/en
Priority to CA2881293A priority patent/CA2881293C/en
Priority to PCT/EP2013/064980 priority patent/WO2014032847A1/en
Publication of EP2703596A1 publication Critical patent/EP2703596A1/en
Application granted granted Critical
Publication of EP2703596B1 publication Critical patent/EP2703596B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • 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
    • 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
    • E21B4/00—Drives for drilling, used in the borehole
    • 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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/18—Anchoring or feeding in the borehole
    • 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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
    • E21B7/201—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes with helical conveying means
    • 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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
    • E21B7/201—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes with helical conveying means
    • E21B7/203—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes with helical conveying means using down-hole drives

Definitions

  • the invention relates to a drilling device for creating a bore within a support tube in the ground according to the preamble of claim 1 and a method for creating a bore in the ground according to the preamble of claim 11.
  • the drilling apparatus comprises a housing which can be inserted into the support tube and fixed in a rotationally fixed manner on the support tube, a cutting device for removing soil material, a rotary drive for rotationally driving the cutting device and a feed device with which a rinsing liquid can be fed into a region of the cutting device.
  • a support tube is introduced into the ground, a drilling device inserted into the support tube and fixed to the support tube rotationally fixed, removed soil material by means of a rotating driven cutting device of the drilling device and fed a rinsing liquid in a region of the cutting device.
  • Drilling arrangements with a drill device which can be fixed in a support tube are suitable in particular for creating boreholes under water, in particular in the offshore area.
  • Such devices and methods for anchoring of supporting structures in the seabed, such as a wind turbine can be used.
  • the drilling device can be introduced from a floating pontoon in the support tube. By means of the drilling device, the interior of the support tube and optionally an underlying area can be drilled out. The drilling device is supported on the support tube.
  • the invention has for its object to provide an apparatus and a method for creating a bore within a support tube, which allow a particularly economic hole creation.
  • the drilling apparatus is according to the invention characterized in that above the cutting device, a receptacle is arranged, in which ablated soil material is conveyed with the rinsing liquid, that in the receptacle at least one stirring element for stirring the removed soil material is provided with the rinsing liquid and that a discharge device is provided, with which the removed soil material can be discharged upwards together with the rinsing liquid from the receiving container.
  • the method according to the invention is characterized in that abraded soil material is conveyed into a receptacle of the drilling device above the cutting device, that in the receiving container the removed soil material is stirred with rinsing liquid and that the removed soil material is removed together with the rinsing liquid from the receptacle upwards.
  • a basic idea of the invention can be seen in providing a drilling apparatus and a corresponding drilling method, which provide a continuous borehole setting allow inside and / or below a support tube.
  • a discharge device is provided, with which the removed soil material together with the rinsing liquid out of the borehole or the support tube out, in particular to the soil surface, can be promoted.
  • the discharge device can in particular comprise a line and a pump.
  • a receiving container or agitating space in which removed soil material is stirred or mixed with the rinsing liquid by means of at least one stirring element.
  • the receiving container with the stirring element can also be referred to as a stirring container.
  • a clamping device is preferably provided, with which the housing can be clamped in the support tube.
  • the drilling device can in particular be clamped or clamped to a tube inner wall of the support tube.
  • the clamping device can have at least one clamping cylinder or punch which can be clamped against the inner wall of the support tube.
  • a plurality of clamping elements are distributed along the circumference of the drilling device.
  • the drilling device thus supported on the support tube.
  • the drilling device can be lowered by means of a rope, for example by a crane, into the support tube.
  • the rotary drive arranged in the drill device which can be braced in the support tube preferably drives a shaft which runs centrally within the drilling device.
  • the cutting device is arranged at the lower end of the shaft and driven in rotation about the shaft.
  • a conveyor in particular a screw conveyor, for conveying the ablated Soil material can be arranged by the cutting device in the receptacle.
  • the conveyor or screw conveyor may, in particular together with the cutting device, be driven in rotation.
  • the cutting device comprises at least one arranged at the lower end of the screw conveyor or conveyor spiral, extending substantially radially extending cutting edge.
  • stirring element is preferably driven in rotation.
  • the at least one stirring element is preferably arranged on a guided through the stirring space, rotatably driven shaft.
  • the rotationally driven stirring element can also be provided on an outer wall of the receiving container.
  • the receptacle has a cylindrical shape.
  • the drive of the stirring element can be provided particularly economically by virtue of the fact that the cutting device and the stirring element can be driven jointly by the rotary drive.
  • a common rotary drive is provided for both the cutting device and the stirring elements.
  • a transmission gear can be provided.
  • Cutting device and stirring element are preferably driven by a common shaft.
  • a drilling head is provided, which can be braced in the support tube, and that a movable bottom part is provided with respect to the drilling head part, which comprises the cutting device and the receptacle.
  • the drilling head part is clamped in the support tube and pressed down the bottom of the drilling including cutter and receptacle.
  • the receptacle with the stirring means is thus always at a defined distance from the cutting device.
  • the tension of the drilling head part is released and the drilling head is traced to the drilling base. Then the drilling head part is clamped again in the support tube and carried out a further drilling step.
  • a feed cylinder For moving the lower part of the drill opposite the upper part of the drill, a feed cylinder is preferably provided.
  • the particular hydraulically operated feed cylinder pushes the bottom of the drill with drill head against the bottom hole.
  • the feed device and / or the discharge device have a telescopic line.
  • the telescoping line can be arranged in particular in the region between the drilling head and the drilling base, which are movable relative to each other.
  • the supply and / or discharge line connected to the lower drilling part can also be mounted axially displaceable within the drilling head part.
  • a particularly efficient mixing of the cuttings with the rinsing liquid can be achieved in that in addition to the at least one driven stirring element at least one fixed mixing element is arranged in the receptacle, which cooperates with the stirring element.
  • at least one fixed mixing element is arranged in the receptacle, which cooperates with the stirring element.
  • a plurality of stirring elements may be arranged on an inner shaft and a plurality of mixing elements on an inner surface of an outer wall of the receptacle.
  • the driven stirring elements and the fixed mixing elements are arranged axially offset from one another and overlap in the radial direction, so that a flow induced by the stirring elements is fluidized by the mixing elements.
  • a comminuting device For comminuting removed soil material before it is introduced into the stirring space, a comminuting device can be arranged below the stirring space.
  • the comminuting device can in particular form a constriction between the cutting device and the receptacle and have a conical guiding and breaking surface, arranged under the constriction, for guiding and breaking rock fragments.
  • the conveyor screw of the conveyor may be mounted for conveying the soil material along the guide and refractive surface of this.
  • the shredding device may be driven via the central shaft within the drilling device.
  • an upwardly tapering between the cutting device and the bottleneck below the stirring space Be formed delivery room In the tapered delivery chamber, a screw conveyor with an upwardly tapering cross section can be set up.
  • the invention relates to a drilling rig with a support tube which can be introduced into the ground and a boring device according to the invention which can be arranged in the support tube.
  • the support tube can preferably be introduced into the ground, for example, shake or screw in before the drilling device is inserted into the support tube.
  • soil material can be removed within and / or below the support tube, in which case the support tube can also be successively driven further into the ground.
  • the advantages described with reference to the drilling device are achieved.
  • the removed soil material can be reliably conveyed out of the borehole by the efficient mixing with the rinsing liquid, whereby a continuous borehole position over large borehole depths is possible.
  • a drilling device 10 according to the invention can be inserted into a support tube (not shown) and lowered into it.
  • the support tube is usually first introduced into the ground and possibly anchored and can then be drilled out by means of the drilled down drilling device.
  • the introduction of the support tube into the ground, for example the bottom of a body of water, can take place by means of a suitable and basically known insertion device, for example a piling device.
  • the support tube then serves on the one hand to support the borehole to be created and on the other hand as an abutment and guide for the drilling device 10 fixed therein.
  • the drilling apparatus 10 comprises a housing 12 which can be fixed or clamped in the support tube at different locations for performing a drilling operation.
  • the housing 12 may be designed as a frame structure and comprises a substantially cylindrical outer contour for insertion into the support tube.
  • a shaft 32 is rotatably supported via pivot bearings 33.
  • the shaft 32 is driven in rotation by means of a rotary drive 26 and drives a drill head with a cutting device 56.
  • the drilling device 10 comprises a drilling head 20 and a drilling base 40 mounted axially displaceably relative thereto.
  • a clamping device 22 is provided on the drilling head 20 or on the housing 12 of the drilling device 10, by means of which the drilling head 20 or the housing 12 rotates in the support tube. and can be clamped axially fixed, is.
  • the clamping device 22 may comprise hydraulically operated actuating cylinder, by means of which clamping elements can be pressed radially outwardly against an inner surface of the support tube.
  • a cable suspension 24 is provided, by means of which the drilling device 10 can be inserted into the support tube and pulled out of this.
  • the drill lower part 40 is movable downwards relative to the drill bit part 20 by means of one or more feed cylinders 30, in particular hydraulic cylinders, so that the drill bottom part 40 can be pressed against the drill hole bottom when the drill bit part is braced in the support tube.
  • the lower drilling part 40 comprises in its lower region a cutting device 56 for removing or separating soil material.
  • a receptacle 44 is arranged, in which a stirring chamber 45 is formed and in addition a conveyor 50 may be arranged.
  • the conveying device 50 serves to convey removed soil material from the cutting device 56 into the stirring chamber 45.
  • the stirring chamber 45 serves to mix the removed soil material with a rinsing liquid which is introduced into the borehole during the drilling process, preferably above the cutting device 56.
  • the lower drilling part 40 may have a guide device 42, which is supported on the support tube and thus ensures reliable guidance of the lower drilling part 40 within the support tube.
  • an agitator is arranged in an upper region.
  • the stirring device can be designed as a static mixer, but it is preferred in terms of an improved stirring performance that the stirring device comprises rotationally driven stirring elements 46.
  • the rotationally driven shaft 32 which drives the cutter 56 in rotation, extends centrally through the receptacle 44.
  • the shaft 32 also drives the screw conveyor 52 at.
  • the stirring members 46 are disposed on an outer periphery of the shaft 32 and are also rotated with the shaft 32.
  • Stirring elements 46 and mixing elements 48 overlap in the radial direction, so that a particularly efficient mixing within the stirring chamber 45 can take place.
  • Stirring elements 46 and mixing elements 48 are designed paddle-shaped and can also be referred to as Rrockpaddel or mixing paddles.
  • a supply device 60 with a supply line 62 and a conveyor or feed pump 64 is provided.
  • the feed line 62 extends in the illustrated embodiment eccentrically along the drilling device 10 and is telescopic. It opens in the region of the conveyor 50 above the cutting device 56 into the receptacle 44.
  • An inlet opening 66 of the supply line 62 is arranged so that the rinsing liquid is introduced transversely to the drilling axis in the region of the conveyor 50. The introduction preferably takes place under pressure, so that premixing with the removed soil material already takes place in the conveying device 50.
  • the feed pump 64 which is in particular a pressure pump, is arranged in the region of the drilling head part 20.
  • a discharge device 70 For discharging the cuttings and rinsing liquid existing suspension from the receptacle 44 and the stirring chamber 45 is a discharge device 70 with a discharge or suction line 72 and a discharge pump 74, in particular a suction pump, is provided.
  • the suction line 72 extends in the illustrated embodiment centrally within the drilling device 10 within the rotationally driven shaft 32.
  • a suction port 76 is provided on the shaft 32 and rotates together with this.
  • a ring-like rotary drive 26 is provided, through which the shaft 32 is passed.
  • the rotary drive 26 is located on the drilling head part 20.
  • the shaft 32 is designed to be telescopic and has at least two axially adjustable shaft elements, which are preferably coupled to each other for torque transmission by means of driver elements 34.
  • the supply line 62 and extending within the shaft 32 discharge line 72 are also designed to be telescopic.
  • the cutter 56 includes one or more cutting bars having a plurality of bits.
  • the cutter bar is attached to a lower end of a screw flight of the screw conveyor 52, respectively.
  • a stationary crushing or comminuting device 54 for breaking or crushing larger rocks is arranged below the stirring chamber 45, through which the removed soil material is conveyed by means of the conveyor 50 into the stirring chamber 45.
  • the constriction 53 has a passage cross section for the removed soil material, which is smaller than a cross section of the stirring chamber 45 and / or a removal cross section at the cutting device 56.
  • the crushing or comminution device 54 includes below the constriction 53 a conical guide surface 55, which conducts the removed soil material to the constriction 53 and optionally, in particular in cooperation with the screw conveyor 52, comminuted.
  • the screw conveyor 52 extends for this purpose along the conical guide surface 55 and is preferably attached to the conical guide surface 55.
  • an upwardly tapering delivery chamber is formed along the spiral conveying screw 52, in which larger pieces of material are comminuted or broken during conveyance in the direction of the mixing chamber 45.
  • the crushing or shredding device 54, in particular the conical guide surface 55 is preferably formed of a hardened material and may also be referred to as a cone or cone crusher.
  • the crusher 54 may be secured to the rotary driven shaft 32 and thus rotationally driven by the shaft 32.
  • the rotationally driven shaft 32 may extend in particular through the crushing or comminution device 54.
  • the screw conveyor 52 is disposed on an outer periphery of the cone-shaped crushing or crushing device 54.
  • a guide device 58 with a further, in particular conical pressure or guide surface 59 is arranged on one of the crushing or comminution device 54 radially opposite outer side.
  • the conical guide surface 59 is also shaped such that the free cross-section for the bottom material tapers upwards and preferably also formed from a hardened material.
  • the rinsing liquid is preferably added to the cuttings in the region of the conveyor 50 or the conveyor screw 52.
  • the introduction opening 66, or optionally a plurality of inlet openings 66, for introducing the rinsing liquid are preferably in the region of the crushing or comminuting device 54, in particular in an outer region, which the crushing or comminuting device 54 or the conical guide surface 55 radially opposite, arranged.
  • an installation device for hydraulics and / or electrics is located on the drilling head part 20.
  • the drilling device 10 is preferably connectable via hydraulic and electrical lines to corresponding supply units outside the support tube.
  • soil can be excavated in a particularly efficient manner in a support tube anchored in the ground.
  • the removed soil material is transported away by means of a conveyor coil from the cutter, mixed with a rinsing liquid and stirred in a stirred container by means of driven stirring elements to prevent sedimentation of the solids content and to keep the cuttings in limbo.
  • the mixture of cuttings and liquid is sucked out of the stirring region by means of a suction pump. This results in a continuous removal of the soil material together with the introduced into the well irrigation, whereby a continuous soil excavation over large drilling depths is possible.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (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)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Paleontology (AREA)
  • Earth Drilling (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Piles And Underground Anchors (AREA)

Abstract

The device (10) has a housing (12) inserted and torque-proof fixed to a support tube, and a cutting unit (56) removing a base material. A receiving container (44) is arranged above the cutting device, and threaded base material with a flushing liquid is conveyed into the receiving container. A stirring element is provided in the receiving container for mixing the threaded base material with the flushing liquid. Discharging equipment removes the threaded base material with flushing liquid in upward direction from the receiving container. Independent claims are also included for the following: (1) a drilling system (2) a method for creating a hole in a base by a drilling device.

Description

Die Erfindung betrifft eine Bohrvorrichtung zum Erstellen einer Bohrung innerhalb eines Stützrohres im Boden gemäß dem Oberbegriff des Anspruchs 1 sowie ein Verfahren zum Erstellen einer Bohrung im Boden gemäß dem Oberbegriff des Anspruchs 11.The invention relates to a drilling device for creating a bore within a support tube in the ground according to the preamble of claim 1 and a method for creating a bore in the ground according to the preamble of claim 11.

Die Bohrvorrichtung umfasst ein Gehäuse, welches in das Stützrohr einsetzbar und an dem Stützrohr drehfest fixierbar ist, eine Schneideinrichtung zum Abtragen von Bodenmaterial, einen Drehantrieb zum drehenden Antreiben der Schneideinrichtung und eine Zuführeinrichtung, mit welcher eine Spülflüssigkeit in einen Bereich der Schneideinrichtung zuführbar ist.The drilling apparatus comprises a housing which can be inserted into the support tube and fixed in a rotationally fixed manner on the support tube, a cutting device for removing soil material, a rotary drive for rotationally driving the cutting device and a feed device with which a rinsing liquid can be fed into a region of the cutting device.

Bei dem Verfahren wird ein Stützrohr in den Boden eingebracht, eine Bohrvorrichtung in das Stützrohr eingesetzt und an dem Stützrohr drehfest fixiert, Bodenmaterial mittels einer drehend angetriebenen Schneideinrichtung der Bohrvorrichtung abgetragen und eine Spülflüssigkeit in einen Bereich der Schneideinrichtung zugeführt.In the method, a support tube is introduced into the ground, a drilling device inserted into the support tube and fixed to the support tube rotationally fixed, removed soil material by means of a rotating driven cutting device of the drilling device and fed a rinsing liquid in a region of the cutting device.

Eine Vorrichtung und ein Verfahren zum Erstellen eines Bohrloches innerhalb beziehungsweise unterhalb eines Stützrohres sind in US 4,202,416 beschrieben. Die Bohrvorrichtung wird in das Stützrohr eingesetzt und in diesem drehfest fixiert. Mittels einer drehend angetriebenen Schneideinrichtung wird Boden abgetragen und sammelt sich an einer oberhalb der Schneideinrichtung vorgesehen Förderschnecke. Wenn die Förderschnecke. Wenn die Förderschnecke gefüllt ist, wird die gesamte Vorrichtung aus dem Stützrohr herausgezogen und die Förderschnecke entleert. Danach kann der Bohrvorgang fortgesetzt werden. Bei dem Verfahren handelt es sich also um ein diskontinuierliches Verfahren.An apparatus and a method for creating a borehole within or below a support tube are in US 4,202,416 described. The drilling device is inserted into the support tube and fixed in this rotation. By means of a rotary driven cutting device soil is removed and collects at a provided above the cutter screw conveyor. If the auger. When the auger is filled, the entire device is pulled out of the support tube and the auger emptied. Thereafter, the drilling process can be continued. The process is therefore a batch process.

Bohranordnungen mit einer in einem Stützrohr fixierbaren Bohrvorrichtung eignen sich insbesondere zur Erstellung von Bohrungen unter Wasser, insbesondere im Offshore-Bereich. Beispielsweise können solche Vorrichtungen und Verfahren zur Verankerung von Tragstrukturen im Meeresgrund, beispielsweise einer Windkraftanlage, eingesetzt werden. Die Bohrvorrichtung kann von einem schwimmenden Ponton aus in das Stützrohr eingebracht werden. Mittels der Bohrvorrichtung kann das Innere des Stützrohres und gegebenenfalls ein darunterliegender Bereich ausgebohrt werden. Die Bohrvorrichtung stützt sich dabei an dem Stützrohr ab.Drilling arrangements with a drill device which can be fixed in a support tube are suitable in particular for creating boreholes under water, in particular in the offshore area. For example, such devices and methods for anchoring of supporting structures in the seabed, such as a wind turbine can be used. The drilling device can be introduced from a floating pontoon in the support tube. By means of the drilling device, the interior of the support tube and optionally an underlying area can be drilled out. The drilling device is supported on the support tube.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung und ein Verfahren zum Erstellen einer Bohrung innerhalb eines Stützrohres anzugeben, welche eine besonders wirtschaftliche Bohrlocherstellung ermöglichen.The invention has for its object to provide an apparatus and a method for creating a bore within a support tube, which allow a particularly economic hole creation.

Die Aufgabe wird erfindungsgemäß durch eine Bohrvorrichtung mit den Merkmalen des Anspruchs 1 sowie ein Verfahren mit den Merkmalen des Anspruchs 11 gelöst. Bevorzugte Ausgestaltungen der Erfindung sind in den abhängigen Ansprüchen angegeben.The object is achieved by a drilling device with the features of claim 1 and a method having the features of claim 11. Preferred embodiments of the invention are specified in the dependent claims.

Die Bohrvorrichtung ist erfindungsgemäß dadurch gekennzeichnet, dass oberhalb der Schneideinrichtung ein Aufnahmebehälter angeordnet ist, in welchen abgetragenes Bodenmaterial mit der Spülflüssigkeit förderbar ist, dass in dem Aufnahmebehälter mindestens ein Rührelement zum Verrühren des abgetragenen Bodenmaterials mit der Spülflüssigkeit vorgesehen ist und dass eine Abführeinrichtung vorgesehen ist, mit welcher das abgetragene Bodenmaterial zusammen mit der Spülflüssigkeit aus dem Aufnahmebehälter nach oben abführbar ist.The drilling apparatus is according to the invention characterized in that above the cutting device, a receptacle is arranged, in which ablated soil material is conveyed with the rinsing liquid, that in the receptacle at least one stirring element for stirring the removed soil material is provided with the rinsing liquid and that a discharge device is provided, with which the removed soil material can be discharged upwards together with the rinsing liquid from the receiving container.

Das Verfahren ist erfindungsgemäß dadurch gekennzeichnet, dass abgetragenes Bodenmaterial in einen Aufnahmebehälter der Bohrvorrichtung oberhalb der Schneideinrichtung gefördert wird, dass in dem Aufnahmebehälter das abgetragene Bodenmaterial mit Spülflüssigkeit verrührt wird und dass das abgetragene Bodenmaterial zusammen mit der Spülflüssigkeit aus dem Aufnahmebehälter nach oben abgeführt wird.The method according to the invention is characterized in that abraded soil material is conveyed into a receptacle of the drilling device above the cutting device, that in the receiving container the removed soil material is stirred with rinsing liquid and that the removed soil material is removed together with the rinsing liquid from the receptacle upwards.

Ein Grundgedanke der Erfindung kann darin gesehen werden, eine Bohrvorrichtung und ein entsprechendes Bohrverfahren anzugeben, welche eine kontinuierliche Bohrlocherstellung innerhalb und/oder unterhalb eines Stützrohres ermöglichen. Erfindungsgemäß ist hierzu gemäß einem ersten Aspekt der Erfindung eine Abführeinrichtung vorgesehen, mit welcher das abgetragene Bodenmaterial zusammen mit der Spülflüssigkeit aus dem Bohrloch beziehungsweise dem Stützrohr heraus, insbesondere zur Bodenoberfläche, gefördert werden kann. Die Abführeinrichtung kann hierzu insbesondere eine Leitung und eine Pumpe umfassen.A basic idea of the invention can be seen in providing a drilling apparatus and a corresponding drilling method, which provide a continuous borehole setting allow inside and / or below a support tube. According to the invention for this purpose, according to a first aspect of the invention, a discharge device is provided, with which the removed soil material together with the rinsing liquid out of the borehole or the support tube out, in particular to the soil surface, can be promoted. For this purpose, the discharge device can in particular comprise a line and a pump.

Damit möglichst kontinuierlich eine Mischung von abgetragenem Bodenmaterial und Spülflüssigkeit gefördert wird, ist erfindungsgemäß ein Aufnahmebehälter oder Rührraum vorgesehen, in welchem abgetragenes Bodenmaterial mittels mindestens einem Rührelement mit der Spülflüssigkeit verrührt oder vermischt wird. Durch das Rühren oder Homogenisieren wird ein Sedimentieren des Feststoffanteils in dem Aufnahmebehälter beziehungsweise Rührraum zumindest weitgehend verhindert. Dies ermöglicht ein effizientes und zuverlässiges Abführen des abgetragenen Bodenmaterials über die Spülflüssigkeit als Trägermedium. Der Aufnahmebehälter mit dem Rührelement kann auch als Rührbehälter bezeichnet werden.In order that a mixture of removed soil material and rinsing liquid is conveyed as continuously as possible, a receiving container or agitating space is provided according to the invention, in which removed soil material is stirred or mixed with the rinsing liquid by means of at least one stirring element. By stirring or homogenizing, sedimentation of the solids content in the receptacle or stirring space is at least largely prevented. This allows efficient and reliable removal of the removed soil material via the rinsing liquid as a carrier medium. The receiving container with the stirring element can also be referred to as a stirring container.

Zum drehfesten Fixieren des Gehäuses in dem Stützrohr ist vorzugsweise eine Klemmeinrichtung vorgesehen, mit welcher das Gehäuse in dem Stützrohr festklemmbar ist. Die Bohrvorrichtung lässt sich insbesondere an einer Rohrinnenwand des Stützrohres festklemmen oder festspannen. Die Klemmeinrichtung kann hierzu mindestens einen Spannzylinder oder Stempel aufweisen, der sich gegen die Innenwand des Stützrohres klemmen lässt. Vorzugsweise sind entlang des Umfangs der Bohrvorrichtung mehrere Klemmelemente verteilt.For rotationally fixed fixing of the housing in the support tube, a clamping device is preferably provided, with which the housing can be clamped in the support tube. The drilling device can in particular be clamped or clamped to a tube inner wall of the support tube. For this purpose, the clamping device can have at least one clamping cylinder or punch which can be clamped against the inner wall of the support tube. Preferably, a plurality of clamping elements are distributed along the circumference of the drilling device.

Zum Ausführen des Bohrvorganges stützt sich die Bohrvorrichtung somit an dem Stützrohr ab. Die Bohrvorrichtung kann mittels eines Seils, beispielsweise von einem Kran, in das Stützrohr abgesenkt werden.To carry out the drilling process, the drilling device thus supported on the support tube. The drilling device can be lowered by means of a rope, for example by a crane, into the support tube.

Der in der im Stützrohr verspannbaren Bohrvorrichtung angeordnete Drehantrieb treibt vorzugsweise eine Welle an, die zentral innerhalb der Bohrvorrichtung verläuft. Die Schneideinrichtung ist am unteren Ende der Welle angeordnet und über die Welle drehend angetrieben.The rotary drive arranged in the drill device which can be braced in the support tube preferably drives a shaft which runs centrally within the drilling device. The cutting device is arranged at the lower end of the shaft and driven in rotation about the shaft.

Zwischen der Schneideinrichtung und dem mindestens einen Rührelement kann eine Fördereinrichtung, insbesondere eine Förderschnecke, zum Fördern des abgetragenen Bodenmaterials von der Schneideinrichtung in den Aufnahmebehälter angeordnet sein. Die Fördereinrichtung oder Förderschnecke kann, insbesondere zusammen mit der Schneideinrichtung, drehend angetrieben sein. Vorzugsweise umfasst die Schneideinrichtung mindestens eine am unteren Ende der Förderschnecke oder Förderwendel angeordnete, sich im Wesentlichen radial erstreckende Schneidkante.Between the cutting device and the at least one stirring element can be a conveyor, in particular a screw conveyor, for conveying the ablated Soil material can be arranged by the cutting device in the receptacle. The conveyor or screw conveyor may, in particular together with the cutting device, be driven in rotation. Preferably, the cutting device comprises at least one arranged at the lower end of the screw conveyor or conveyor spiral, extending substantially radially extending cutting edge.

Für eine effiziente Durchmischung des Bohrgutes und der Spülflüssigkeit innerhalb des Aufnahmebehälters ist das in dem Aufnahmebehälter angeordneten Rührelement vorzugsweise drehend antreibbar. Das mindestens eine Rührelement ist vorzugsweise an einer durch den Rührraum hindurchgeführten, drehend angetriebenen Welle angeordnet. Grundsätzlich kann das drehend angetriebene Rührelement aber auch an einer Außenwand des Aufnahmebehälters vorgesehen sein. Vorzugsweise weist der Aufnahmebehälter eine zylindrische Form auf.For an efficient mixing of the cuttings and the rinsing liquid within the receptacle arranged in the receptacle stirring element is preferably driven in rotation. The at least one stirring element is preferably arranged on a guided through the stirring space, rotatably driven shaft. In principle, however, the rotationally driven stirring element can also be provided on an outer wall of the receiving container. Preferably, the receptacle has a cylindrical shape.

Der Antrieb des Rührelements lässt sich besonders wirtschaftlich dadurch bereitstellen, dass die Schneideinrichtung und das Rührelement gemeinsam durch den Drehantrieb antreibbar sind. Es ist also ein gemeinsamer Drehantrieb für sowohl die Schneideinrichtung als auch die Rührelemente vorgesehen. Um gleichwohl unterschiedliche Drehgeschwindigkeiten zu ermöglichen, kann ein Übersetzungsgetriebe vorgesehen sein. Schneideinrichtung und Rührelement werden vorzugsweise über eine gemeinsame Welle angetrieben.The drive of the stirring element can be provided particularly economically by virtue of the fact that the cutting device and the stirring element can be driven jointly by the rotary drive. Thus, a common rotary drive is provided for both the cutting device and the stirring elements. However, to enable different rotational speeds, a transmission gear can be provided. Cutting device and stirring element are preferably driven by a common shaft.

Erfindungsgemäß ist es des Weiteren bevorzugt, dass ein Bohroberteil vorgesehen ist, welches in dem Stützrohr verspannbar ist, und dass ein bezüglich des Bohroberteils ein verfahrbares Bohrunterteil vorgesehen ist, welches die Schneideinrichtung und den Aufnahmebehälter umfasst. Zum Erstellen einer Bohrung innerhalb des Stützrohres wird das Bohroberteil in dem Stützrohr eingeklemmt und das Bohrunterteil samt Schneideinrichtung und Aufnahmebehälter nach unten gepresst. Der Aufnahmebehälter mit den Rühreinrichtungen befindet sich damit stets in einem definierten Abstand zur Schneideinrichtung. Nach einem bestimmten Bohrfortschritt wird die Verspannung des Bohroberteils gelöst und das Bohroberteil dem Bohrunterteil nachgefahren. Dann wird das Bohroberteil erneut in dem Stützrohr verspannt und ein weiterer Bohrschritt ausgeführt.According to the invention, it is further preferred that a drilling head is provided, which can be braced in the support tube, and that a movable bottom part is provided with respect to the drilling head part, which comprises the cutting device and the receptacle. To create a hole within the support tube, the drilling head part is clamped in the support tube and pressed down the bottom of the drilling including cutter and receptacle. The receptacle with the stirring means is thus always at a defined distance from the cutting device. After a certain drilling progress, the tension of the drilling head part is released and the drilling head is traced to the drilling base. Then the drilling head part is clamped again in the support tube and carried out a further drilling step.

Zum Verfahren des Bohrunterteils gegenüber dem Bohroberteil ist vorzugsweise ein Vorschubzylinder vorgesehen. Der insbesondere hydraulisch betriebene Vorschubzylinder drückt das Bohrunterteil mit Bohrkopf gegen die Bohrlochsohle.For moving the lower part of the drill opposite the upper part of the drill, a feed cylinder is preferably provided. The particular hydraulically operated feed cylinder pushes the bottom of the drill with drill head against the bottom hole.

Des Weiteren ist es erfindungsgemäß bevorzugt, dass die Zuführeinrichtung und/ oder die Abführeinrichtung eine teleskopierbare Leitung aufweist. Die teleskopierbare Leitung kann insbesondere im Bereich zwischen dem Bohroberteil und dem Bohrunterteil, welche zueinander bewegbar sind, angeordnet sein. Alternativ kann die an das Bohrunterteil angeschlossene Zuführ- und/oder Abführleitung auch axial verschiebbar innerhalb des Bohroberteils gelagert sein.Furthermore, it is preferred according to the invention that the feed device and / or the discharge device have a telescopic line. The telescoping line can be arranged in particular in the region between the drilling head and the drilling base, which are movable relative to each other. Alternatively, the supply and / or discharge line connected to the lower drilling part can also be mounted axially displaceable within the drilling head part.

Eine besonders effiziente Durchmischung des Bohrgutes mit der Spülflüssigkeit lässt sich dadurch erzielen, dass in dem Aufnahmebehälter zusätzlich zu dem mindestens einen angetriebenen Rührelement mindestens ein feststehendes Mischelement angeordnet ist, welches mit dem Rührelement zusammenwirkt. Beispielsweise können mehrere Rührelemente an einer inneren Welle und mehrere Mischelemente an einer Innenfläche einer Außenwand des Aufnahmebehälters angeordnet sein. Vorzugsweise sind die angetriebenen Rührelemente und die feststehenden Mischelemente axial versetzt zueinander angeordnet und überschneiden sich in radialer Richtung, so dass eine durch die Rührelemente induzierte Strömung durch die Mischelemente verwirbelt wird.A particularly efficient mixing of the cuttings with the rinsing liquid can be achieved in that in addition to the at least one driven stirring element at least one fixed mixing element is arranged in the receptacle, which cooperates with the stirring element. For example, a plurality of stirring elements may be arranged on an inner shaft and a plurality of mixing elements on an inner surface of an outer wall of the receptacle. Preferably, the driven stirring elements and the fixed mixing elements are arranged axially offset from one another and overlap in the radial direction, so that a flow induced by the stirring elements is fluidized by the mixing elements.

Zum Zerkleinern von abgetragenem Bodenmaterial vor dessen Einbringen in den Rührraum kann unterhalb des Rührraums eine Zerkleinerungseinrichtung angeordnet sein. Die Zerkleinerungseinrichtung kann insbesondere eine Engstelle zwischen der Schneideinrichtung und dem Aufnahmebehälter bilden und eine unter der Engstelle angeordnete, insbesondere konische Leit- und Brechfläche zum Leiten und Brechen von Gesteinsbrocken aufweisen. Die Förderschnecke der Fördereinrichtung kann zum Fördern des Bodenmaterials entlang der Leit- und Brechfläche an dieser befestigt sein. Die Zerkleinerungseinrichtung kann über die zentrale Welle innerhalb der Bohrvorrichtung angetrieben sein.For comminuting removed soil material before it is introduced into the stirring space, a comminuting device can be arranged below the stirring space. The comminuting device can in particular form a constriction between the cutting device and the receptacle and have a conical guiding and breaking surface, arranged under the constriction, for guiding and breaking rock fragments. The conveyor screw of the conveyor may be mounted for conveying the soil material along the guide and refractive surface of this. The shredding device may be driven via the central shaft within the drilling device.

Zum Zerkleinern von abgetragenem Bodenmaterial kann zwischen der Schneideinrichtung und der Engstelle unterhalb des Rührraums ein sich nach oben verjüngender Förderraum gebildet sein. In dem sich verjüngenden Förderraum kann eine Förderschnecke mit einem sich nach oben verjüngenden Querschnitt eingerichtet sein.For the comminution of abraded soil material, an upwardly tapering between the cutting device and the bottleneck below the stirring space Be formed delivery room. In the tapered delivery chamber, a screw conveyor with an upwardly tapering cross section can be set up.

In einem weiteren Aspekt betrifft die Erfindung eine Bohranlage mit einem in den Boden einbringbaren Stützrohr und einer erfindungsgemäßen Bohrvorrichtung, welche in dem Stützrohr anordbar ist. Das Stützrohr lässt sich vorzugsweise in den Boden einbringen, beispielsweise einrütteln oder eindrehen, bevor die Bohrvorrichtung in das Stützrohr eingesetzt wird. Mit der Bohrvorrichtung lässt sich Bodenmaterial innerhalb und/oder unterhalb des Stützrohres abtragen, wobei hierbei das Stützrohr auch sukzessive weiter in den Boden eingetrieben werden kann.In a further aspect, the invention relates to a drilling rig with a support tube which can be introduced into the ground and a boring device according to the invention which can be arranged in the support tube. The support tube can preferably be introduced into the ground, for example, shake or screw in before the drilling device is inserted into the support tube. With the drilling device, soil material can be removed within and / or below the support tube, in which case the support tube can also be successively driven further into the ground.

Mit dem erfindungsgemäßen Verfahren werden die anhand der Bohrvorrichtung beschriebenen Vorteile erzielt. Insbesondere lässt sich das abgetragene Bodenmaterial durch die effiziente Vermischung mit der Spülflüssigkeit zuverlässig aus dem Bohrloch herausfördern, wobei eine kontinuierliche Bohrlocherstellung über große Bohrlochtiefen möglich ist.With the method according to the invention, the advantages described with reference to the drilling device are achieved. In particular, the removed soil material can be reliably conveyed out of the borehole by the efficient mixing with the rinsing liquid, whereby a continuous borehole position over large borehole depths is possible.

Die Erfindung wird nachfolgend anhand von bevorzugten Ausführungsbeispielen, welche in den beigefügten, schematischen Figuren dargestellt sind, weiter erläutert. Es zeigt:

Fig. 1
eine perspektivische Ansicht einer erfindungsgemäßen Bohrvorrichtung;
Fig. 2
eine Querschnittsansicht einer erfindungsgemäßen Bohrvorrichtung;
Fig. 3
eine Querschnittsansicht eines erfindungsgemäßen Aufnahmebehälters mit Schneid- und Fördereinrichtung; und
Fig. 4
eine perspektivische Ansicht eines erfindungsgemäßen Aufnahmebehälters mit Schneid- und Fördereinrichtung.
The invention will be further elucidated on the basis of preferred exemplary embodiments, which are illustrated in the appended schematic figures. It shows:
Fig. 1
a perspective view of a drilling device according to the invention;
Fig. 2
a cross-sectional view of a drilling device according to the invention;
Fig. 3
a cross-sectional view of a receptacle according to the invention with cutting and conveying device; and
Fig. 4
a perspective view of a receptacle according to the invention with cutting and conveying device.

Gleiche oder gleich wirkende Elemente sind in sämtlichen Figuren mit denselben Bezugszeichen gekennzeichnet.Identical or equivalent elements are indicated in all figures with the same reference numerals.

Eine erfindungsgemäße Bohrvorrichtung 10 kann in ein nicht dargestelltes Stützrohr eingesetzt und in dieses abgesenkt werden. Das Stützrohr wird üblicherweise zunächst in den Boden eingebracht und gegebenenfalls verankert und kann dann mittels der darin hinabkletternden Bohrvorrichtung ausgebohrt werden. Die Einbringung des Stützrohres in den Boden, beispielsweise den Grund eines Gewässers, kann mittels einer geeigneten und grundsätzlich bekannten Einbringvorrichtung, beispielsweise einer Rammvorrichtung, erfolgen. Das Stützrohr dient dann einerseits der Abstützung des zu erstellenden Bohrloches und andererseits als Widerlager und Führung für die darin fixierte Bohrvorrichtung 10.A drilling device 10 according to the invention can be inserted into a support tube (not shown) and lowered into it. The support tube is usually first introduced into the ground and possibly anchored and can then be drilled out by means of the drilled down drilling device. The introduction of the support tube into the ground, for example the bottom of a body of water, can take place by means of a suitable and basically known insertion device, for example a piling device. The support tube then serves on the one hand to support the borehole to be created and on the other hand as an abutment and guide for the drilling device 10 fixed therein.

Die Bohrvorrichtung 10 umfasst ein Gehäuse 12, welches in dem Stützrohr an unterschiedlichen Stellen zum Ausführen eines Bohrvorgangs festgelegt oder verspannt werden kann. Das Gehäuse 12 kann als Rahmenstruktur ausgeführt sein und umfasst eine im Wesentlichen zylinderförmige Außenkontur zum Einsetzen in das Stützrohr.The drilling apparatus 10 comprises a housing 12 which can be fixed or clamped in the support tube at different locations for performing a drilling operation. The housing 12 may be designed as a frame structure and comprises a substantially cylindrical outer contour for insertion into the support tube.

In dem Gehäuse 12 ist eine Welle 32 über Drehlager 33 drehbar gelagert. Die Welle 32 ist mittels eines Drehantriebs 26 drehend angetrieben und treibt einen Bohrkopf mit einer Schneideinrichtung 56 an.In the housing 12, a shaft 32 is rotatably supported via pivot bearings 33. The shaft 32 is driven in rotation by means of a rotary drive 26 and drives a drill head with a cutting device 56.

Die Bohrvorrichtung 10 umfasst ein Bohroberteil 20 und ein relativ zu diesem axial verschiebbar gelagertes Bohrunterteil 40. An dem Bohroberteil 20 oder an dem Gehäuse 12 der Bohrvorrichtung 10 ist eine Klemmeinrichtung 22 vorgesehen, mittels welcher das Bohroberteil 20 beziehungsweise das Gehäuse 12 in dem Stützrohr dreh- und axialfest verspannt werden kann, ist. Die Klemmeinrichtung 22 kann hydraulisch betätigte Stellzylinder umfassen, mittels welcher Klemmelemente radial nach außen gegen eine Innenfläche des Stützrohres gepresst werden können.The drilling device 10 comprises a drilling head 20 and a drilling base 40 mounted axially displaceably relative thereto. A clamping device 22 is provided on the drilling head 20 or on the housing 12 of the drilling device 10, by means of which the drilling head 20 or the housing 12 rotates in the support tube. and can be clamped axially fixed, is. The clamping device 22 may comprise hydraulically operated actuating cylinder, by means of which clamping elements can be pressed radially outwardly against an inner surface of the support tube.

An einem oberen Ende des Bohroberteils 20 ist eine Seilaufhängung 24 vorgesehen, mittels welcher die Bohrvorrichtung 10 in das Stützrohr eingelassen und aus diesem herausgezogen werden kann.At an upper end of the Bohroberteils 20, a cable suspension 24 is provided, by means of which the drilling device 10 can be inserted into the support tube and pulled out of this.

Das Bohrunterteil 40 ist mittels einem oder mehrerer Vorschubzylinder 30, insbesondere Hydraulikzylinder, gegenüber dem Bohroberteil 20 nach unten verfahrbar, so dass das Bohrunterteil 40 gegen die Bohrlochsohle gepresst werden kann, wenn das Bohroberteil in dem Stützrohr verspannt ist.The drill lower part 40 is movable downwards relative to the drill bit part 20 by means of one or more feed cylinders 30, in particular hydraulic cylinders, so that the drill bottom part 40 can be pressed against the drill hole bottom when the drill bit part is braced in the support tube.

Das Bohrunterteil 40 umfasst in seinem unteren Bereich eine Schneideinrichtung 56 zum Abtragen oder Abtrennen von Bodenmaterial. Oberhalb der Schneideinrichtung 56 ist ein Aufnahmebehälter 44 angeordnet, in welchem ein Rührraum 45 ausgebildet ist und zusätzlich eine Fördereinrichtung 50 angeordnet sein kann. Die Fördereinrichtung 50 dient zum Fördern von abgetragenem Bodenmaterial von der Schneideinrichtung 56 in den Rührraum 45. Der Rührraum 45 dient zum Vermischen des abgetragenen Bodenmaterials mit einer Spülflüssigkeit, die während des Bohrvorgangs, vorzugsweise oberhalb der Schneideinrichtung 56, in das Bohrloch eingeleitet wird.The lower drilling part 40 comprises in its lower region a cutting device 56 for removing or separating soil material. Above the cutting device 56, a receptacle 44 is arranged, in which a stirring chamber 45 is formed and in addition a conveyor 50 may be arranged. The conveying device 50 serves to convey removed soil material from the cutting device 56 into the stirring chamber 45. The stirring chamber 45 serves to mix the removed soil material with a rinsing liquid which is introduced into the borehole during the drilling process, preferably above the cutting device 56.

An seinem dem Bohroberteil 20 zugewandten, oberen Ende kann das Bohrunterteil 40 eine Führungseinrichtung 42 aufweisen, die sich an dem Stützrohr abstützt und auf diese Weise eine zuverlässige Führung des Bohrunterteils 40 innerhalb des Stützrohres gewährleistet.At its upper end facing the drilling head 20, the lower drilling part 40 may have a guide device 42, which is supported on the support tube and thus ensures reliable guidance of the lower drilling part 40 within the support tube.

In dem insbesondere zylindrischen Aufnahmebehälter 44 ist in einem oberen Bereich eine Rühreinrichtung angeordnet. Grundsätzlich kann die Rühreinrichtung als statischer Mischer ausgeführt sein, allerdings ist es im Sinne einer verbesserten Rührleistung bevorzugt, dass die Rühreinrichtung drehend angetriebene Rührelemente 46 umfasst. Unterhalb des Mischraums 45, in einem unteren Bereich des Aufnahmebehälters 44 befindet sich eine Förderschnecke 52, mittels welcher abgetragenes Bodenmaterial von der Schneideinrichtung 56 in den Rührraum 45 förderbar ist.In the particular cylindrical receptacle 44, an agitator is arranged in an upper region. In principle, the stirring device can be designed as a static mixer, but it is preferred in terms of an improved stirring performance that the stirring device comprises rotationally driven stirring elements 46. Below the mixing space 45, in a lower region of the receiving container 44, there is a conveying screw 52, by means of which removed soil material can be conveyed by the cutting device 56 into the stirring space 45.

Die drehend angetriebene Welle 32, welche die Schneideinrichtung 56 drehend antreibt, erstreckt sich mittig durch den Aufnahmebehälter 44. Die Welle 32 treibt außerdem die Förderschnecke 52 an. Die Rührelemente 46 sind an einem Außenumfang der Welle 32 angeordnet und werden ebenfalls mit der Welle 32 gedreht.The rotationally driven shaft 32, which drives the cutter 56 in rotation, extends centrally through the receptacle 44. The shaft 32 also drives the screw conveyor 52 at. The stirring members 46 are disposed on an outer periphery of the shaft 32 and are also rotated with the shaft 32.

An einer äußeren, feststehenden Behälterwand des Aufnahmebehälters 44 sind axial versetzt zu den Rührelementen 46 feststehende Umwälz- oder Mischelemente 48 angeordnet. Rührelemente 46 und Mischelemente 48 überschneiden sich in radialer Richtung, so dass eine besonders effiziente Durchmischung innerhalb des Rührraums 45 erfolgen kann. Rührelemente 46 und Mischelemente 48 sind paddelförmig ausgestaltet und können auch als Rührpaddel beziehungsweise Mischpaddel bezeichnet werden.On an outer, stationary container wall of the receptacle 44 are axially offset from the stirring elements 46 fixed recirculation or mixing elements 48 are arranged. Stirring elements 46 and mixing elements 48 overlap in the radial direction, so that a particularly efficient mixing within the stirring chamber 45 can take place. Stirring elements 46 and mixing elements 48 are designed paddle-shaped and can also be referred to as Rührpaddel or mixing paddles.

Zum Zuführen der Spülflüssigkeit, welche insbesondere Wasser sein kann, ist eine Zuführeinrichtung 60 mit einer Zuführleitung 62 und einer Fördereinrichtung oder Zuführpumpe 64 vorgesehen. Die Zuführleitung 62 verläuft in dem dargestellten Ausführungsbeispiel exzentrisch entlang der Bohrvorrichtung 10 und ist teleskopierbar ausgeführt. Sie mündet im Bereich der Fördereinrichtung 50 oberhalb der Schneideinrichtung 56 in den Aufnahmebehälter 44. Eine Einleitöffnung 66 der Zuführleitung 62 ist so angeordnet, dass die Spülflüssigkeit quer zur Bohrachse in den Bereich der Fördereinrichtung 50 eingeleitet wird. Die Einleitung erfolgt vorzugsweise unter Druck, so dass bereits in der Fördereinrichtung 50 eine Vormischung mit dem abgetragenen Bodenmaterial erfolgt. Die Zuführpumpe 64, welche insbesondere eine Druckpumpe ist, ist im Bereich des Bohroberteils 20 angeordnet.For supplying the rinsing liquid, which may be in particular water, a supply device 60 with a supply line 62 and a conveyor or feed pump 64 is provided. The feed line 62 extends in the illustrated embodiment eccentrically along the drilling device 10 and is telescopic. It opens in the region of the conveyor 50 above the cutting device 56 into the receptacle 44. An inlet opening 66 of the supply line 62 is arranged so that the rinsing liquid is introduced transversely to the drilling axis in the region of the conveyor 50. The introduction preferably takes place under pressure, so that premixing with the removed soil material already takes place in the conveying device 50. The feed pump 64, which is in particular a pressure pump, is arranged in the region of the drilling head part 20.

Zum Abführen der aus Bohrgut und Spülflüssigkeit bestehenden Suspension aus dem Aufnahmebehälter 44 beziehungsweise dem Rührraum 45 ist eine Abführeinrichtung 70 mit einer Abführ- oder Saugleitung 72 und einer Abführumpe 74, insbesondere einer Saugpumpe, vorgesehen. Die Saugleitung 72 verläuft in dem dargestellten Ausführungsbeispiel zentral innerhalb der Bohrvorrichtung 10 innerhalb der drehend angetriebenen Welle 32. Eine Absaugöffnung 76 ist an der Welle 32 vorgesehen und dreht sich zusammen mit dieser.For discharging the cuttings and rinsing liquid existing suspension from the receptacle 44 and the stirring chamber 45 is a discharge device 70 with a discharge or suction line 72 and a discharge pump 74, in particular a suction pump, is provided. The suction line 72 extends in the illustrated embodiment centrally within the drilling device 10 within the rotationally driven shaft 32. A suction port 76 is provided on the shaft 32 and rotates together with this.

Zum Antreiben der Welle 32 ist ein ringartiger Drehantrieb 26 vorgesehen, durch welchen die Welle 32 hindurchgeführt ist. Der Drehantrieb 26 befindet sich an dem Bohroberteil 20. Die Welle 32 ist teleskopierbar ausgeführt und weist mindestens zwei axial zueinander verstellbare Wellenelemente auf, welche vorzugsweise zur Drehmomentübertragung mittels Mitnehmerelementen 34 miteinander gekoppelt sind. Die Zuführleitung 62 sowie die innerhalb der Welle 32 verlaufende Abführleitung 72 sind ebenfalls teleskopierbar ausgeführt.For driving the shaft 32, a ring-like rotary drive 26 is provided, through which the shaft 32 is passed. The rotary drive 26 is located on the drilling head part 20. The shaft 32 is designed to be telescopic and has at least two axially adjustable shaft elements, which are preferably coupled to each other for torque transmission by means of driver elements 34. The supply line 62 and extending within the shaft 32 discharge line 72 are also designed to be telescopic.

Die Schneideinrichtung 56 umfasst eine oder mehrere Schneidleisten mit einer Mehrzahl von Meißeln. Die Schneidleiste ist jeweils an einem unteren Ende einer Schneckenwendel der Förderschnecke 52 angebracht.The cutter 56 includes one or more cutting bars having a plurality of bits. The cutter bar is attached to a lower end of a screw flight of the screw conveyor 52, respectively.

Unterhalb des Misch- oder Rührraums 45 ist eine feststehende Brech- oder Zerkleinerungseinrichtung 54 zum Brechen oder Zerkleinern von größeren Gesteinsbrocken angeordnet. Hierzu ist unterhalb des Rührraums 45 eine Engstelle 53 gebildet, durch welche das abgetragene Bodenmaterial mittels der Fördereinrichtung 50 in den Rührraum 45 gefördert wird. Die Engstelle 53 weist einen Durchtrittsquerschnitt für das abgetragene Bodenmaterial auf, welcher kleiner ist als ein Querschnitt des Rührraums 45 und/oder ein Abtragsquerschnitt an der Schneideinrichtung 56.Below the mixing or stirring chamber 45, a stationary crushing or comminuting device 54 for breaking or crushing larger rocks is arranged. For this purpose, a constriction 53 is formed below the stirring chamber 45, through which the removed soil material is conveyed by means of the conveyor 50 into the stirring chamber 45. The constriction 53 has a passage cross section for the removed soil material, which is smaller than a cross section of the stirring chamber 45 and / or a removal cross section at the cutting device 56.

Die Brech- oder Zerkleinerungseinrichtung 54 umfasst unterhalb der Engstelle 53 eine konische Leitfläche 55, welche das abgetragene Bodenmaterial zur Engstelle 53 leitet und gegebenenfalls, insbesondere in Zusammenwirken mit der Förderschnecke 52, zerkleinert. Die Förderschnecke 52 verläuft hierzu entlang der konischen Leitfläche 55 und ist vorzugsweise an der konischen Leitfläche 55 befestigt. Hierdurch wird entlang der spiralförmigen Förderschnecke 52 ein sich nach oben verjüngender Förderraum gebildet, in welchem größere Materialstücke beim Fördern in Richtung des Mischraumes 45 zerkleinert oder gebrochen werden. Die Brech- oder Zerkleinerungseinrichtung 54, insbesondere die konische Leitfläche 55, ist vorzugsweise aus einem gehärteten Material gebildet und kann auch als Kegel- oder Konusbrecher bezeichnet werden.The crushing or comminution device 54 includes below the constriction 53 a conical guide surface 55, which conducts the removed soil material to the constriction 53 and optionally, in particular in cooperation with the screw conveyor 52, comminuted. The screw conveyor 52 extends for this purpose along the conical guide surface 55 and is preferably attached to the conical guide surface 55. As a result, an upwardly tapering delivery chamber is formed along the spiral conveying screw 52, in which larger pieces of material are comminuted or broken during conveyance in the direction of the mixing chamber 45. The crushing or shredding device 54, in particular the conical guide surface 55, is preferably formed of a hardened material and may also be referred to as a cone or cone crusher.

Die Brech- oder Zerkleinerungseinrichtung 54 kann, wie in den Figuren dargestellt, an der drehend angetriebenen Welle 32 befestigt und somit durch die Welle 32 drehend angetrieben sein. Die drehend angetriebene Welle 32 kann sich insbesondere durch die Brech- oder Zerkleinerungseinrichtung 54 hindurch erstrecken. Vorzugsweise ist die Förderschnecke 52 an einem Außenumfang der konusförmigen Brech- oder Zerkleinerungseinrichtung 54 angeordnet. Zur Unterstützung des Zerkleinerungsvorgangs ist an einer der Brech- oder Zerkleinerungseinrichtung 54 radial gegenüberliegenden Außenseite eine Leiteinrichtung 58 mit einer weiteren, insbesondere konischen Andruck- oder Leitfläche 59 angeordnet. Die konische Leitfläche 59 ist ebenfalls derart geformt, dass sich der freie Querschnitt für das Bodenmaterial nach oben verjüngt und vorzugsweise ebenfalls aus einem gehärteten Material gebildet.As shown in the figures, the crusher 54 may be secured to the rotary driven shaft 32 and thus rotationally driven by the shaft 32. The rotationally driven shaft 32 may extend in particular through the crushing or comminution device 54. Preferably, the screw conveyor 52 is disposed on an outer periphery of the cone-shaped crushing or crushing device 54. To support the comminution process, a guide device 58 with a further, in particular conical pressure or guide surface 59 is arranged on one of the crushing or comminution device 54 radially opposite outer side. The conical guide surface 59 is also shaped such that the free cross-section for the bottom material tapers upwards and preferably also formed from a hardened material.

Die Spülflüssigkeit wird vorzugsweise im Bereich Fördereinrichtung 50 beziehungsweise der Förderschnecke 52 dem Bohrgut zugemischt. Die Einleitöffnung 66, oder gegebenenfalls mehrere Einleitöffnungen 66, zum Einleiten der Spülflüssigkeit sind vorzugsweise im Bereich der Brech- oder Zerkleinerungseinrichtung 54, insbesondere in einem äußeren Bereich, welcher der Brech- oder Zerkleinerungseinrichtung 54 oder der konischen Leitfläche 55 radial gegenüberliegt, angeordnet.The rinsing liquid is preferably added to the cuttings in the region of the conveyor 50 or the conveyor screw 52. The introduction opening 66, or optionally a plurality of inlet openings 66, for introducing the rinsing liquid are preferably in the region of the crushing or comminuting device 54, in particular in an outer region, which the crushing or comminuting device 54 or the conical guide surface 55 radially opposite, arranged.

An dem Bohroberteil 20 befindet sich des Weiteren eine Installationseinrichtung für Hydraulik und/oder Elektrik. Die Bohrvorrichtung 10 ist vorzugsweise über Hydraulik- und elektrische Leitungen an entsprechende Versorgungseinheiten außerhalb des Stützrohres anschließbar.Furthermore, an installation device for hydraulics and / or electrics is located on the drilling head part 20. The drilling device 10 is preferably connectable via hydraulic and electrical lines to corresponding supply units outside the support tube.

Mit der erfindungsgemäßen Vorrichtung und dem erfindungsgemäßen Verfahren lässt sich auf besonders effiziente Weise in einem im Boden verankerten Stützrohr Boden ausheben. Das abgetragene Bodenmaterial wird mittels einer Förderwendel von der Schneideinrichtung wegtransportiert, mit einer Spülflüssigkeit vermischt und in einem Rührbehälter mittels angetriebener Rührelemente verrührt, um ein Sedimentieren des Feststoffanteils zu verhindern und das Bohrgut im Schwebezustand zu halten. Das Gemisch aus Bohrgut und Flüssigkeit wird mittels einer Saugpumpe aus dem Rührbereich abgesaugt. Hierdurch erfolgt ein kontinuierlicher Abtrag des Bodenmaterials zusammen mit der in das Bohrloch eingebrachten Spülflüssigkeit, wodurch ein kontinuierlicher Bodenaushub über große Bohrtiefen möglich ist.With the device according to the invention and the method according to the invention, soil can be excavated in a particularly efficient manner in a support tube anchored in the ground. The removed soil material is transported away by means of a conveyor coil from the cutter, mixed with a rinsing liquid and stirred in a stirred container by means of driven stirring elements to prevent sedimentation of the solids content and to keep the cuttings in limbo. The mixture of cuttings and liquid is sucked out of the stirring region by means of a suction pump. This results in a continuous removal of the soil material together with the introduced into the well irrigation, whereby a continuous soil excavation over large drilling depths is possible.

Claims (11)

Bohrvorrichtung zum Erstellen einer Bohrung innerhalb eines Stützrohres im Boden mit - einem Gehäuse (12), welches in das Stützrohr einsetzbar und an dem Stützrohr drehfest fixierbar ist, - einer Schneideinrichtung (56) zum Abtragen von Bodenmaterial, - einem Drehantrieb (26) zum drehenden Antreiben der Schneideinrichtung (56) und - einer Zuführeinrichtung (60), mit welcher eine Spülflüssigkeit in einen Bereich der Schneideinrichtung (56) zuführbar ist, dadurch gekennzeichnet, - dass oberhalb der Schneideinrichtung (56) ein Aufnahmebehälter (44) angeordnet ist, in welchen abgetragenes Bodenmaterial mit der Spülflüssigkeit förderbar ist, - dass in dem Aufnahmebehälter (44) mindestens ein Rührelement (46) zum Verrühren des abgetragenen Bodenmaterials mit der Spülflüssigkeit vorgesehen ist, und - dass eine Abführeinrichtung (70) vorgesehen ist, mit welcher das abgetragene Bodenmaterial zusammen mit der Spülflüssigkeit aus dem Aufnahmebehälter (44) nach oben abführbar ist. Drilling device for creating a hole within a support tube in the ground with - A housing (12) which is insertable into the support tube and fixed rotatably on the support tube, a cutting device (56) for removing soil material, - A rotary drive (26) for rotationally driving the cutting device (56) and a feed device (60), with which a rinsing liquid can be fed into a region of the cutting device (56), characterized, in that above the cutting device (56) a receiving container (44) is arranged, in which removed soil material can be conveyed with the rinsing liquid, - That in the receptacle (44) at least one stirring element (46) is provided for stirring the abraded soil material with the rinsing liquid, and - That a discharge device (70) is provided, with which the removed soil material together with the rinsing liquid from the receptacle (44) can be discharged upwards. Bohrvorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
dass eine Klemmeinrichtung (22) vorgesehen ist, mit welcher das Gehäuse (12) in dem Stützrohr festklemmbar ist.Drilling device according to claim 1,
characterized,
that a clamping device (22) is provided, with which the housing (12) can be clamped in the support tube. Bohrvorrichtung nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
dass zwischen der Schneideinrichtung (56) und dem mindestens einen Rührelement (46) eine Förderschnecke (52) angeordnet ist.Drilling device according to claim 1 or 2,
characterized,
in that a conveying screw (52) is arranged between the cutting device (56) and the at least one stirring element (46). Bohrvorrichtung nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
dass das in dem Aufnahmebehälter (44) angeordnete, mindestens eine Rührelement (46) drehend antreibbar ist.Drilling device according to one of claims 1 to 3,
characterized,
in that the at least one stirring element (46) arranged in the receptacle (44) can be driven in rotation. Bohrvorrichtung nach Anspruch 4,
dadurch gekennzeichnet,
dass die Schneideinrichtung (56) und das mindestens eine Rührelement (46) gemeinsam durch den Drehantrieb (26) antreibbar sind.Drilling device according to claim 4,
characterized,
in that the cutting device (56) and the at least one stirring element (46) can be driven jointly by the rotary drive (26). Bohrvorrichtung nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet,
dass ein Bohroberteil (20) vorgesehen ist, welches in dem Stützrohr verspannbar ist, und
dass ein bezüglich des Bohroberteils (20) verfahrbares Bohrunterteil (40) vorgesehen ist, welches die Schneideinrichtung (56) und den Aufnahmebehälter (44) umfasst.Drilling device according to one of claims 1 to 5,
characterized,
that a drilling head (20) is provided, which is clamped in the support tube, and
in that a drilling base (40) which can be moved relative to the drilling head part (20) is provided, which comprises the cutting device (56) and the receptacle (44). Bohrvorrichtung nach Anspruch 6,
dadurch gekennzeichnet,
dass ein Stellzylinder (30) vorgesehen ist, mit welchem das Bohrunterteil (40) bezüglich des Bohroberteils (20) verfahrbar ist.Drilling device according to claim 6,
characterized,
that an adjusting cylinder (30) is provided, with which the drilling sub (40) with respect to the Bohroberteils (20) is movable. Bohrvorrichtung nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet,
dass die Zuführeinrichtung (60) und/oder die Abführeinrichtung (70) eine teleskopierbare Leitung (62, 72) aufweist.Drilling device according to one of claims 1 to 7,
characterized,
in that the feed device (60) and / or the discharge device (70) has a telescopic line (62, 72). Bohrvorrichtung nach einem der Ansprüche 1 bis 8,
dadurch gekennzeichnet,
dass in dem Aufnahmebehälter (44) zusätzlich zu dem mindestens einen angetriebenen Rührelement (46) mindestens ein feststehendes Mischelement (48) angeordnet ist, welches mit dem Rührelement (46) zusammenwirkt.Drilling device according to one of claims 1 to 8,
characterized,
in that in addition to the at least one driven stirring element (46), at least one fixed mixing element (48) is arranged in the receiving container (44), which cooperates with the stirring element (46). Bohranlage mit einem in den Boden einbringbaren Stützrohr und einer in dem Stützrohr anordbaren Bohrvorrichtung (10) nach einem der Ansprüche 1 bis 9.Drilling rig with a support tube which can be introduced into the ground and a boring device (10) which can be arranged in the support tube according to one of claims 1 to 9. Verfahren zum Erstellen einer Bohrung im Boden, insbesondere mittels einer Bohrvorrichtung (10) nach einem der Ansprüche 1 bis 10 und/oder einer Bohranlage nach Anspruch 11, bei welchem - ein Stützrohr in den Boden eingebracht wird, - eine Bohrvorrichtung (10) in das Stützrohr eingesetzt und an dem Stützrohr drehfest fixiert wird, - Bodenmaterial mittels einer drehend angetriebenen Schneideinrichtung (56) der Bohrvorrichtung (10) abgetragen wird und - eine Spülflüssigkeit in einen Bereich der Schneideinrichtung (56) zugeführt wird, dadurch gekennzeichnet, - dass abgetragenes Bodenmaterial in einen Aufnahmebehälter (44) der Bohrvorrichtung (10) oberhalb der Schneideinrichtung (56) gefördert wird, - dass in dem Aufnahmebehälter (44) das abgetragene Bodenmaterial mit Spülflüssigkeit verrührt wird und - dass das abgetragene Bodenmaterial zusammen mit der Spülflüssigkeit aus dem Aufnahmebehälter (44) nach oben abgeführt wird. Method for creating a bore in the ground, in particular by means of a drilling device (10) according to one of claims 1 to 10 and / or a drilling rig according to claim 11, in which a support tube is inserted into the ground, a drilling device (10) is inserted into the support tube and fixed in a rotationally fixed manner to the support tube, - Soil material is removed by means of a rotationally driven cutting device (56) of the drilling device (10) and a rinsing liquid is fed into a region of the cutting device (56), characterized, - that removed soil material is conveyed into a receptacle (44) of the drilling device (10) above the cutting device (56), - That in the receptacle (44) the removed soil material is stirred with rinsing liquid and - That the removed soil material is discharged together with the rinsing liquid from the receptacle (44) upwards.
EP12006182.5A 2012-08-31 2012-08-31 Drilling device and method for producing a borehole Not-in-force EP2703596B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP12006182.5A EP2703596B1 (en) 2012-08-31 2012-08-31 Drilling device and method for producing a borehole
CN201380045727.5A CN104619945B (en) 2012-08-31 2013-07-16 For producing drilling equipment and the method in hole
US14/424,993 US20150322737A1 (en) 2012-08-31 2013-07-16 Drilling device and method for producing a bore
CA2881293A CA2881293C (en) 2012-08-31 2013-07-16 Drilling device and method for producing a bore
PCT/EP2013/064980 WO2014032847A1 (en) 2012-08-31 2013-07-16 Boring apparatus and method for producing a bore

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12006182.5A EP2703596B1 (en) 2012-08-31 2012-08-31 Drilling device and method for producing a borehole

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EP2703596A1 true EP2703596A1 (en) 2014-03-05
EP2703596B1 EP2703596B1 (en) 2015-02-18

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EP (1) EP2703596B1 (en)
CN (1) CN104619945B (en)
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WO (1) WO2014032847A1 (en)

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EP3862528A1 (en) * 2020-02-04 2021-08-11 BAUER Maschinen GmbH Down hole drilling rig and method for producing a borehole
EP3336301B1 (en) * 2016-12-19 2023-09-13 BAUER Maschinen GmbH Drilling apparatus and method for producing a borehole

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Publication number Publication date
WO2014032847A1 (en) 2014-03-06
CA2881293C (en) 2017-05-16
CN104619945A (en) 2015-05-13
US20150322737A1 (en) 2015-11-12
CA2881293A1 (en) 2014-03-06
EP2703596B1 (en) 2015-02-18
CN104619945B (en) 2016-09-14

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