EP1905945A1 - Tarière pour excaver un puits dans le sol - Google Patents

Tarière pour excaver un puits dans le sol Download PDF

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Publication number
EP1905945A1
EP1905945A1 EP06019898A EP06019898A EP1905945A1 EP 1905945 A1 EP1905945 A1 EP 1905945A1 EP 06019898 A EP06019898 A EP 06019898A EP 06019898 A EP06019898 A EP 06019898A EP 1905945 A1 EP1905945 A1 EP 1905945A1
Authority
EP
European Patent Office
Prior art keywords
drill
auger
guide element
guide
auger bit
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.)
Withdrawn
Application number
EP06019898A
Other languages
German (de)
English (en)
Inventor
Erwin Emil Stötzer
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 EP06019898A priority Critical patent/EP1905945A1/fr
Publication of EP1905945A1 publication Critical patent/EP1905945A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • E21B10/00—Drill bits
    • E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
    • E21B17/1057—Centralising devices with rollers or with a relatively rotating sleeve

Definitions

  • the invention relates to a worm borer for creating a borehole in the ground according to the preamble of claim 1.
  • a worm borer has a drill shank and at least one drill spiral extending along the drill shank.
  • Such auger are for example from the DE 10 2005 011 120 A1 and the DE 87 16 926 U1 known.
  • screw augers are usually screwed by means of a, in particular telescopic, drill string in the ground, the drill bit is loaded with soil. Then the auger is pulled by means of the drill pipe and emptied outside the borehole. Depending on the desired drill hole depth, the process can be repeated.
  • the object of the invention is to provide a worm drill, which allows a particularly high accuracy in the well hole position with particularly long service life.
  • the worm drill according to the invention is characterized in that radially spaced from the drill shaft at least one guide element for supporting the worm drill is arranged on a wall of the borehole, wherein the guide element is rotatably mounted relative to the drill shaft.
  • the invention is based on the finding that the observed drilling errors and also the damages which may be observed can be attributed to a bend in the drill pipe on which the screw drill is arranged. Such a bend occurs in particular when working with hard ground geologies with high contact forces and / or when at large drilling depths, the free length of the drill string is large. This bend can cause the auger to become entangled in the bore and allow the bore to pass. Excessive entanglement of the drilling tool can cause observed damage.
  • At least one guide element is provided by means of which the worm borer can be supported on the cylindrical wall of an already created borehole section.
  • This guide element provides an additional drilling-base guidance of the auger in the already created wellbore, which in the prior art only by the drill pipe and possibly restricted by the drill spiral is given. In this way, a bending of the auger boom linkage can be effectively counteracted and unwanted entanglement can be largely prevented. Drilling errors are thus counteracted and the life of the auger and drill string is increased.
  • the guide element with respect to the drill shaft and in particular also the drill spiral is designed to be rotatable about the drilling axis extending along the drill shaft.
  • the guide element rotates during rotation of the drill shaft and drill spiral by means of the linkage and thus possibly damaged the borehole wall, which in turn could result in inferior drilling and / or a deteriorated guide on the borehole wall.
  • a particularly good and reliable investment of the guide element on the wall of the borehole is ensured by the rotatable mounting and thus increases the drilling precision.
  • the auger according to the invention can be used both in cased or partially cased drilling and in free, that is uncased drilling.
  • the inner wall of the tube can at least temporarily form the wall of the borehole, on which the guide element is supported.
  • a rigid drill pipe is suitably provided, which is preferably telescopic.
  • the drill string can be designed as a Kelly rod. Since, according to the invention, a guide on the auger takes place, the drill pipe itself can be provided spaced from the borehole wall, in particular with a cross-section which is smaller than the cross-section of the auger.
  • the auger has at the end of the drill shaft facing away from the drill bit on a connecting device for releasably connecting to a drill string.
  • the guide element suitably has at least one ring element for circumferential engagement with the borehole wall.
  • the guide element serves in particular for guidance on a borehole wall which has been produced by at least one of the boring spirals.
  • the outer cross section of the guide element can at least approximately correspond to the execution cross section of the drill helix.
  • the guide element is designed as a guide bell, wherein the guide bell preferably has a cylindrical outer wall portion which is suitably formed on its side facing away from the drill bit with a diameter taper.
  • the guide bell preferably has a cylindrical outer wall portion which is suitably formed on its side facing away from the drill bit with a diameter taper.
  • a particularly simple construction according to the invention is given by the fact that at least one spacer is provided for holding the guide element on the drill shaft.
  • a particularly good power absorption is given by the fact that the spacer extends in the radial direction from the drill shank away.
  • the at least one spacer is suitably arranged in the interior of the bell, in particular in the region of the cylindrical outer wall section.
  • spacer disc-shaped in particular annular, is formed.
  • it can also have several spokes.
  • the reliability of the auger may be increased by providing two or more spacers offset along the drill shank. This can be advantageous in particular when using a guide bell.
  • the spacer has at least one recess, in particular for material passage along the drill shank.
  • a recess may serve, on the one hand, to allow water present in the borehole, but also gas, to flow past the spacer with little resistance and thus reduce the axial forces when inserting the auger into the bore and / or when pulling the auger.
  • the passage openings for the passage of dresscelm soil material, in particular in the interior of the guide bell serve.
  • the at least one recess can also serve to reduce the weight of the auger.
  • the spacer is rotatably mounted on the drill shaft.
  • a corresponding bearing can be arranged on the drill shaft.
  • the spacer is rotatably mounted on the guide element.
  • a bearing may be provided on the inner wall of the guide bell.
  • At least one of the spacers is suitably located in a middle and / or in an upper area of the drill shank, wherein the upper one is to be understood as a region facing away from the drill bit of the auger.
  • a particularly simple construction is given by the fact that for rotatably supporting the guide element relative to the drill shank, at least one slide bearing, in particular on the spacer, is provided.
  • a sliding bearing may for example comprise steel and / or bronze elements.
  • at least one rolling bearing may be provided.
  • the guide bell preferably in the region of the diameter taper, at least one recess, in particular for the passage of material, is provided.
  • the recess may in particular serve for the passage of water and / or gas, which is located in the borehole.
  • the recess may serve to reduce the forces to be applied during lowering and / or when pulling the auger.
  • the recess is suitably provided in an upper region of the guide bell, in particular in a cover region of the guide bell.
  • a particularly compact design is given by a good drilling progress in that at least one drill spiral extends into the guide bell and in particular is tapered in the region of the guide bell.
  • the interior of the guide bell can be used in a simple manner for receiving Constantm soil material, so that with the same dimensions at each stroke more soil material can be removed.
  • a method for creating a borehole in the ground in which a screw auger according to the invention is screwed into the ground, wherein the boring coil is loaded with soil, and the auger is then pulled out of the ground.
  • the advantages described in connection with the device can be realized.
  • the screwing in and pulling out of the auger can also be repeated several times.
  • the excavated soil is ejected after pulling by centrifugal force from the drilling helix.
  • the invention also relates to a drilling apparatus in which the described auger is combined with a drill string.
  • FIG. 1 An embodiment of a worm drill 1 according to the invention is shown in Fig. 1.
  • the auger 1 has a drill shank 11, on which, starting from a drill bit 12, two boring spirals 15, 15 'extend longitudinally. Both drill coils 15, 15 'are in the area of the drill bit 12 occupied with drill teeth 16. While the drilling helix 15 'surrounds the drill shank 11 substantially only once, the drill helix 15 orbits the drill shank 11 several times and extends upward beyond the drill helix 15'. In the area of the drill bit 12, both drill coils 15, 15 'are designed to be tapered.
  • connection device 51 for connecting the screwdriver 1 to a telescoping drill string, not shown in the figure, which can be designed in particular as a Kelly rod.
  • a guide element 20 designed as a guide bell is provided above the boring spirals 15, 15 ', which surrounds the drill stem 11 coaxially. That as a guide bell trained guide member 20 has a cylindrical outer wall portion 22, to which on its side facing away from the drill bit 12 a conical diameter taper 23 connects. In the area of the cylindrical outer wall section 22, the outer cross section of the guide element 20 corresponds to the processing cross section of the boring spirals 15, 15 ', so that the guide element 20 fits precisely in the lateral borehole wall produced by the boring screws 15, 15'.
  • the guide element 20 is mounted on the drill shaft 11 via two disk-like spacers 30, 30 'which are offset along the drill string 11 and extend radially from the drill shank 11. Radially on the outside of the spacers 30, 30 ', that is on the inner wall of the guide element 20, is on the spacers 30, 30' each have a sliding bearing 36, 36 'for rotatably supporting the guide member 20 relative to the drill shaft 11 and the boring screws 15, 15th provided around the drilling axis 70.
  • the disc-shaped spacers 30, 30 'and thus also the plain bearings 36, 36' are arranged at the level of the cylindrical outer wall portion 22 on the guide element 20.
  • the lower spacer 30 is offset from the bell base of the guide member 20 formed as a guide bell into the interior of the bell. In the region of this offset, the drilling helix 15 extends into the interior of the guide element 20, so that material removed by means of the drilling helix 15 can be conveyed into the interior of the guide element 20. At the level of the guide element 20, the drill spiral 15 has a diameter taper, which prevents the drill spiral 15 from coming into contact with the inner wall of the guide element 20.
  • both staggered spacers 30, 30 'recesses 31, 31' are each provided, the one Passage of water, which may be in the borehole, allow along the drill shank 11.
  • 20 recesses 26, 27 are arranged in the guide element. These further recesses 26, 27 are above the upper spacer 30 ', that is provided on its side facing away from the drill bit 12 side.
  • the recesses 26 are arranged in transverse struts 28 for stiffening the guide element 20.
  • the recess 27 is provided in a radially extending cover 25, which closes the guide element 20 upwards.
  • the recesses 31, 31 ', 26, 27 allow a passage, for example of groundwater, from the interior of the guide member 20 to the outside, so that a lowering and pulling the auger 1 is possible with very little effort.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
EP06019898A 2006-09-22 2006-09-22 Tarière pour excaver un puits dans le sol Withdrawn EP1905945A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06019898A EP1905945A1 (fr) 2006-09-22 2006-09-22 Tarière pour excaver un puits dans le sol

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06019898A EP1905945A1 (fr) 2006-09-22 2006-09-22 Tarière pour excaver un puits dans le sol

Publications (1)

Publication Number Publication Date
EP1905945A1 true EP1905945A1 (fr) 2008-04-02

Family

ID=37806836

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06019898A Withdrawn EP1905945A1 (fr) 2006-09-22 2006-09-22 Tarière pour excaver un puits dans le sol

Country Status (1)

Country Link
EP (1) EP1905945A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2525892A (en) * 2014-05-07 2015-11-11 Tudor21 Ltd A hole cutting device
WO2018076095A1 (fr) 2016-10-28 2018-05-03 Chelsea Pasch Appareil de tarière de sol encastré pour évaluations archéologiques et son procédé de fonctionnement
CN109339710A (zh) * 2018-11-28 2019-02-15 卢小玲 一种破碎功能的旋挖机螺旋钻头
CN111101872A (zh) * 2020-01-08 2020-05-05 李强 一种用于螺旋打桩机的垂直护筒
CN116356815A (zh) * 2023-04-23 2023-06-30 中铁隧道局集团有限公司 一种深厚软土地区土体变形和振动气囊隔离结构

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2675213A (en) * 1951-04-13 1954-04-13 Hallen Company Inc Horizontal earth boring machine
AT352774B (de) * 1977-12-15 1979-10-10 Aumann Keller & Pichler K G Ba Vorrichtung zum abbau und ausbringen des boden- materials bei rohrvortrieben
US4228862A (en) * 1977-11-15 1980-10-21 Antoine Causse Apparatus for drilling holes in the ground
US4553612A (en) * 1983-11-09 1985-11-19 Durham Marion E Earth boring machine
EP1085166A1 (fr) * 1999-09-15 2001-03-21 Compagnie Du Sol Fleuret hélicoidal

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2675213A (en) * 1951-04-13 1954-04-13 Hallen Company Inc Horizontal earth boring machine
US4228862A (en) * 1977-11-15 1980-10-21 Antoine Causse Apparatus for drilling holes in the ground
AT352774B (de) * 1977-12-15 1979-10-10 Aumann Keller & Pichler K G Ba Vorrichtung zum abbau und ausbringen des boden- materials bei rohrvortrieben
US4553612A (en) * 1983-11-09 1985-11-19 Durham Marion E Earth boring machine
EP1085166A1 (fr) * 1999-09-15 2001-03-21 Compagnie Du Sol Fleuret hélicoidal

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2525892A (en) * 2014-05-07 2015-11-11 Tudor21 Ltd A hole cutting device
GB2525892B (en) * 2014-05-07 2017-05-24 Tudor21 Ltd A hole cutting device
WO2018076095A1 (fr) 2016-10-28 2018-05-03 Chelsea Pasch Appareil de tarière de sol encastré pour évaluations archéologiques et son procédé de fonctionnement
EP3443193A4 (fr) * 2016-10-28 2019-11-20 Chelsea Pasch Appareil de tarière de sol encastré pour évaluations archéologiques et son procédé de fonctionnement
GB2564989B (en) * 2016-10-28 2021-05-05 Pasch Chelsea Encased soil auger apparatus for archeological assessments and method of operating the same
AU2017351759B2 (en) * 2016-10-28 2022-02-03 Chelsea Pasch Encased soil auger apparatus for archeological assessments and method of operating the same
CN109339710A (zh) * 2018-11-28 2019-02-15 卢小玲 一种破碎功能的旋挖机螺旋钻头
CN109339710B (zh) * 2018-11-28 2020-11-06 金华值益信息科技有限公司 一种具有破碎功能的旋挖机螺旋钻头
CN111101872A (zh) * 2020-01-08 2020-05-05 李强 一种用于螺旋打桩机的垂直护筒
CN111101872B (zh) * 2020-01-08 2021-08-17 江门市丰力机械有限公司 一种用于螺旋打桩机的垂直护筒
CN116356815A (zh) * 2023-04-23 2023-06-30 中铁隧道局集团有限公司 一种深厚软土地区土体变形和振动气囊隔离结构
CN116356815B (zh) * 2023-04-23 2023-10-20 中铁隧道局集团有限公司 一种深厚软土地区土体变形和振动气囊隔离结构

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