EP1085166A1 - Spiralbohrer - Google Patents

Spiralbohrer Download PDF

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Publication number
EP1085166A1
EP1085166A1 EP00402300A EP00402300A EP1085166A1 EP 1085166 A1 EP1085166 A1 EP 1085166A1 EP 00402300 A EP00402300 A EP 00402300A EP 00402300 A EP00402300 A EP 00402300A EP 1085166 A1 EP1085166 A1 EP 1085166A1
Authority
EP
European Patent Office
Prior art keywords
auger
casing
rotation
drill bit
drilling tool
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Withdrawn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
EP00402300A
Other languages
English (en)
French (fr)
Inventor
Bertrand Steff De Verninac
Philippe Chagnot
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.)
Compagnie du Sol SARL
Original Assignee
Compagnie du Sol SARL
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 Compagnie du Sol SARL filed Critical Compagnie du Sol SARL
Publication of EP1085166A1 publication Critical patent/EP1085166A1/de
Withdrawn legal-status Critical Current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
    • 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

Definitions

  • the present invention relates to a drilling tool provided with a casing to make wells or excavations in the ground.
  • FIG 1 there is shown schematically a drilling tool equipped with its casing. More specifically, there is shown the vertical mast 10 of the tool on which is guided in vertical translation the head 12 for rotating the auger 14 via the vertical axis 16. There is also shown a casing 18 connected to the mast 10 by connection elements 20, allowing the depression of the casing 18 as the well 22 is drilled.
  • An object of the present invention is to provide a tool for drilling the auger type which includes a casing allowing to produce a displacement vertical of the ground extracted by the auger with respect to the casing equipping it.
  • the drilling tool comprising a drilling auger assembly, means for rotating the assembly forming an auger and casing surrounding over part of its length the auger assembly, is characterized in that said casing comprises on at at least part of its length means to limit the speed of rotation of the ground extracted by the auger assembly near the internal face of said casing relative to the speed of rotation of said auger assembly, whereby the rotation of the auger assembly allows the vertical movement of the ground extracted inside said casing.
  • the braking means are formed by an internal lining of the casing having a coefficient of high friction for the ground or by grooves on the internal face of the casing or more generally by any arrangement making it possible to slow down the rotation of the peripheral part of the extracted ground contained in the casing in relation to the speed of rotation of the auger itself, in particular by increasing the coefficient of friction of the internal face of the casing.
  • the subject of the invention is also various improvements made to the auger itself in relation to the casing according to the invention.
  • FIG. 2 we will describe the whole of a casing drilling tool according to the invention.
  • the auger assembly 30 which is constituted in the example considered by a upper auger 32 and by a lower auger 34.
  • the upper auger 32 is rotated by a hollow pin 36 cooperating with a rotation head 38.
  • the lower auger 34 is rotated by a pin 40 which is engaged in the hollow axis 36 of the upper auger.
  • the end of the axis 40 is driven in rotation by a head 42, the heads 38 and 42 being movable in translation on the mast not shown.
  • the cylindrical casing 44 which surrounds at least the upper auger 32.
  • This casing is integral with its upper end 44a of connection means not shown in detail 46 which allow the establishment of the casing 44 as the drilling progresses.
  • the internal face 50 of the casing 44 comprises means, preferably mechanical, which limit the speed of rotation of the part of the ground extracted by the auger and which is driven in rotation by it. These means are suitable for braking the terrain at inside the casing with respect to its peripheral zone.
  • a first embodiment of the braking means consist of a coating 52 produced on the face internal 50 of the casing using a material with a high coefficient of friction of the less compared to the ground extracted by the auger.
  • FIG 4 there is shown a second embodiment in which the internal face 50 of the casing 44 is provided with grooves such as 54 which have a suitable depth. These grooves extend over at least one part of the height of the casing 44.
  • FIG. 5 shows a third embodiment of the braking means. These consist of a helix hollowed out at its center 56 and which is integral with the internal wall 50 of the casing 44. This propeller which is fixed causes the desired braking effect when the auger 32 has a rotational movement.
  • the propeller 56 is not integral casing 44 but that it can be animated by a different rotational movement of the auger 32's rotational movement. This also gives an effect of braking of the periphery of the ground extracted by the auger.
  • the lower auger 44 has an external diameter D 2 which is at least equal to the external diameter D O of the casing 44. It is understood that this promotes the insertion of the casing into the borehole as and when it is made of it. On the other hand, it goes without saying that the diameter D 1 of the upper auger is less than the internal diameter of the casing 44.
  • the rotation heads 38 and 42 can be ordered in such a way that the lower auger 34 and the auger upper 32 are rotated in opposite directions.
  • the ground extracted by the lower auger 34 will be pumped laterally in the direction of the arrows F in the connection area between the two augers, that is to say at the lower end of the upper auger 32.
  • the end lower 32a of the upper auger 32 protrudes from the lower end 44b of the casing with a length L which preferably corresponds to one pitch of the propeller constituting the upper auger 32.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
EP00402300A 1999-09-15 2000-08-17 Spiralbohrer Withdrawn EP1085166A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9911505A FR2798420B1 (fr) 1999-09-15 1999-09-15 Outil de forage muni d'un tubage
FR9911505 1999-09-15

Publications (1)

Publication Number Publication Date
EP1085166A1 true EP1085166A1 (de) 2001-03-21

Family

ID=9549846

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00402300A Withdrawn EP1085166A1 (de) 1999-09-15 2000-08-17 Spiralbohrer

Country Status (2)

Country Link
EP (1) EP1085166A1 (de)
FR (1) FR2798420B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1905945A1 (de) * 2006-09-22 2008-04-02 BAUER Maschinen GmbH Schneckenbohrer zum Erstellen eines Bohrlochs im Erdboden
EP2011958A1 (de) * 2007-07-06 2009-01-07 BAUER Maschinen GmbH Erdbohrer
EP2339107A3 (de) * 2009-12-22 2011-08-17 Fredi Stury Bohrgerät mit Teleskopbohrschnecke Adapterstück und bohrverfahren zur durchführung von Bohrungen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0311363A2 (de) * 1987-10-05 1989-04-12 Kawasaki Steel Corporation Hohler Stahlpfahl, Erzeugungsmethode und Methode zum Einrammen eines Pfahles
EP0699823A1 (de) * 1993-05-14 1996-03-06 Kabushiki Kaisha Komatsu Seisakusho Kontrollvorrichtung für die erdabladung für eine vortriebsmaschine für rohre kleinen durchmessers

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0311363A2 (de) * 1987-10-05 1989-04-12 Kawasaki Steel Corporation Hohler Stahlpfahl, Erzeugungsmethode und Methode zum Einrammen eines Pfahles
EP0699823A1 (de) * 1993-05-14 1996-03-06 Kabushiki Kaisha Komatsu Seisakusho Kontrollvorrichtung für die erdabladung für eine vortriebsmaschine für rohre kleinen durchmessers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1905945A1 (de) * 2006-09-22 2008-04-02 BAUER Maschinen GmbH Schneckenbohrer zum Erstellen eines Bohrlochs im Erdboden
EP2011958A1 (de) * 2007-07-06 2009-01-07 BAUER Maschinen GmbH Erdbohrer
EP2339107A3 (de) * 2009-12-22 2011-08-17 Fredi Stury Bohrgerät mit Teleskopbohrschnecke Adapterstück und bohrverfahren zur durchführung von Bohrungen

Also Published As

Publication number Publication date
FR2798420A1 (fr) 2001-03-16
FR2798420B1 (fr) 2001-12-14

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