EP0537624B1 - Aufweitkopf - Google Patents

Aufweitkopf Download PDF

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Publication number
EP0537624B1
EP0537624B1 EP92117188A EP92117188A EP0537624B1 EP 0537624 B1 EP0537624 B1 EP 0537624B1 EP 92117188 A EP92117188 A EP 92117188A EP 92117188 A EP92117188 A EP 92117188A EP 0537624 B1 EP0537624 B1 EP 0537624B1
Authority
EP
European Patent Office
Prior art keywords
expanding
expansion
elements
carrier shaft
head according
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.)
Expired - Lifetime
Application number
EP92117188A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0537624A1 (de
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.)
FlowTex Technologie GmbH and Co KG
Original Assignee
Flowtex Technologie Import Von Kabelverlegemaschinen 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 Flowtex Technologie Import Von Kabelverlegemaschinen GmbH filed Critical Flowtex Technologie Import Von Kabelverlegemaschinen GmbH
Publication of EP0537624A1 publication Critical patent/EP0537624A1/de
Application granted granted Critical
Publication of EP0537624B1 publication Critical patent/EP0537624B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
    • 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
    • E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • 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
    • E21B7/28—Enlarging drilled holes, e.g. by counterboring

Definitions

  • the invention relates to an expansion head for drilling systems for the underground laying of lines according to the preamble of patent claim 1.
  • a system lance is inserted into the ground at an angle of approximately 15 to 30 ° and, after reaching the intended laying depth, driven horizontally to a previously created assembly pit by remote control. After the system lance has reached the assembly pit, the lance is dismantled and the line to be laid is attached to the drill pipe and pulled into the hole in reverse. In this case, however, it may be necessary to expand the bore already created with the aid of an expansion head if the diameter of the lines to be drawn in exceeds the diameter of the system lance.
  • Such expanding heads are for example from the brochure "What does FlowTex mean for Germany?" known from 1986. They consist of a carrier axis with a first fastening device for the drill pipe and a second fastening device for the material to be drawn in. Holes are provided in the carrier axis through which a drilling suspension is supplied, which facilitates the loosening and removal of the earth material. Furthermore, the known expansion head consists of a basically conical expansion body attached to the carrier axis, which is provided with highly wear-resistant, abrasive bodies.
  • the known expanding heads Since the expanding heads have to be rotated at a speed between 0 and 200 revolutions per minute during the drilling process, the transmission of the rotational energy through the drill pipe is a problem. In particular when stopping the rotation, the known expanding heads can stress the drill pipe by excessive torsional forces and thereby may be permanently deformed. In addition, the known expansion heads have the problem that the removal of the drilling suspension and the removed earth materials is inadequate, as a result of which the soil can be raised above the drilling.
  • a device for expanding and drawing in a material according to the preamble of claim 1 is recognized.
  • a material such as a pipeline
  • a disk-shaped expansion element with a diameter larger than the material to be drawn in is provided. between this one expansion element and the material to be drawn in, there is a further body provided with a conical tip with abrasive elements, which has a diameter smaller than the upstream expansion element.
  • the intermediate body consists of an elongated cylinder with the described cone tip and serves to urge the additional floor material due to the expansion element to the side walls, so that the material to be drawn in behind does not have to displace the resulting floor material.
  • this known device also has the problem that when the drill pipe is braked, a large mass - here the cylindrical body and the expansion element - must be braked.
  • This technical problem is in a widening head with a carrier axis, which has a first fastening device for a drill pipe and a second fastening device for a material to be drawn in, as well as bores for the supply of a drilling suspension, an expanding body with highly wear-resistant, abrasive bodies being arranged on the carrier axis is achieved in that the expansion body consists of at least two individual, disc-like expansion elements of different diameters, which are arranged at a mutual distance from one another on the support axis, the respective diameters of the expansion elements decreasing in the direction from the second fastening device to the first fastening device.
  • the expansion head according to the invention has a significantly lower mass than the known expansion heads, since it is constructed from individual disk-like elements which are arranged at a mutual distance from one another on the carrier axis. This can, on the one hand, for a given Rotational energy can be drilled at a higher speed. On the other hand, the expansion head according to the invention causes only a slight twisting of the drill pipe when stopping.
  • At least one of the expansion elements is provided with bores for the supply of the drilling suspension.
  • the drilling suspension can be blasted from the disk-like expansion elements in any direction, in particular forwards, backwards and outwards, which facilitates the expansion of the bore and the removal of the material obtained during drilling.
  • the expansion elements are also provided with highly wear-resistant, abrasive bodies, the expansion work is carried out by both mechanical and hydraulic work.
  • At least one of the expansion elements is provided with passage openings in a region between the carrier axis and the outer circumference of the expansion element.
  • the widening element consists of an outer ring rim, which with at least three radially extending webs inner ring rim is connected, which in turn surrounds the carrier axis.
  • the mass of such an expansion head is reduced as much as possible.
  • such an expansion head has very good drilling properties, since both the drilling suspension and the drilled material mix particularly well due to the openings between the radial webs and can be removed from the borehole.
  • the expansion elements are detachably attached to the carrier axis.
  • an expansion head with a variable, i.e. adjustable outer diameter created.
  • Such an expansion head has the great advantage over the known expansion heads with a diameter that cannot be changed, that the dimensions of the expansion head can be changed by mounting expansion plates of different sizes.
  • the expansion head can be quickly adapted to the requirements with just a few simple steps.
  • the abrasive bodies are arranged on the outer ring rim of the expansion element at different radial distances.
  • Such an expansion head has particularly good drilling properties.
  • the disk-like expansion elements have a diameter of approximately 40 to 500 mm. This allows cables up to a diameter of approx. 500 mm to be drawn into the borehole.
  • the expansion head according to the invention means that the above described advantages achieved, depending on the drilling diameter, three, four or more disk-like expansion elements may be required.
  • the expanding head shown in FIG. 1 consists of a carrier axis 10 which is fastened to a drill rod 13 with a first fastening device 12.
  • the material 15 to be drawn in is fastened to the carrier axis 10 via a second fastening device 14.
  • Holes (not shown) are provided in the carrier axis 10 for the supply of a drilling suspension.
  • Four disc-like expansion elements 16 of different diameters are arranged on the support axis at a mutual axial distance.
  • the outer diameter of the expanding elements increases counter to the drilling direction, as a result of which the expanding head has a basically conical shape.
  • FIG. 2 shows an example of an expansion element 16 from the front.
  • This consists of an outer ring rim 22, which is connected to an inner ring rim 24 via three radially extending webs 26.
  • the inner ring rim 24 is provided with a rectangular center opening 25 through which the carrier axis 10 extends in the assembled state. Due to the structure described above, the carrier element 16 has three openings 20 which extend over the entire axial thickness of the Expand element 16.
  • a plurality of abrasive bodies 28 are arranged on the outer ring rim 22 both on an outer surface and on the peripheral surface, only a few of which are indicated in FIG. 2.
  • the outer diameter of the expansion elements 16 is between 40 and 500 mm.
  • the outer diameter of the expansion head can be adjusted in a few simple steps. Depending on the requirements, several expansion elements 16 of different diameters are mounted on the carrier axis 10, the minimum and the maximum outer diameter and the opening angle of the expansion head being easily adjustable by selecting the various expansion elements.
  • each expansion element 16 there are several bores 18 (FIG. 2) through which the drilling suspension can exit.
  • the bores 18 are connected to the bores (not shown) in the carrier axis 10. The choice of the size and the exit angle of the bores 18 allows the exit of the drilling suspension to be controlled in any desired manner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Drilling Tools (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Earth Drilling (AREA)
  • Paper (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Separation By Low-Temperature Treatments (AREA)
EP92117188A 1991-10-15 1992-10-08 Aufweitkopf Expired - Lifetime EP0537624B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4134095 1991-10-15
DE4134095A DE4134095C1 (enrdf_load_stackoverflow) 1991-10-15 1991-10-15

Publications (2)

Publication Number Publication Date
EP0537624A1 EP0537624A1 (de) 1993-04-21
EP0537624B1 true EP0537624B1 (de) 1996-02-21

Family

ID=6442718

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92117188A Expired - Lifetime EP0537624B1 (de) 1991-10-15 1992-10-08 Aufweitkopf

Country Status (5)

Country Link
EP (1) EP0537624B1 (enrdf_load_stackoverflow)
AT (1) ATE134416T1 (enrdf_load_stackoverflow)
DE (1) DE4134095C1 (enrdf_load_stackoverflow)
DK (1) DK0537624T3 (enrdf_load_stackoverflow)
ES (1) ES2086042T3 (enrdf_load_stackoverflow)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4220430C2 (de) * 1992-06-24 1994-09-22 Tracto Technik Verfahren und Vorrichtung zum Herstellen einer Erdbohrung
DE4403040C2 (de) * 1994-01-28 1997-09-11 Schwarzloh Hans Peter Aufweitkopf zum Aufweiten einer Pilotbohrung im Lockergesteinsbereich
DE19523769C1 (de) * 1994-12-19 1996-08-08 Flowtex Technologie Import Von Vorrichtung und Verfahren zur Leitungsverlegung in stufengrabenartiger Anordnung
EP0718461A3 (de) * 1994-12-19 1998-04-29 FLOWTEX TECHNOLOGIE-IMPORT VON KABELVERLEGEMASCHINEN GmbH Vorrichtung und Verfahren zur Leitungsverlegung in stufengrabenartiger Anordnung
AT1296U1 (de) * 1995-12-22 1997-02-25 Rabmer Josef Verfahren und vorrichtung zum aufgrabungsfreien verlegen von rohrleitungen
DE19718527C2 (de) * 1997-05-02 2002-10-17 Tracto Technik Vorrichtung zum Aufweiten einer Erdbohrung
DE10144973B4 (de) * 2001-09-12 2004-02-05 Tracto-Technik Gmbh Flügelräumer, Verfahren zum Bohren mit einem Flügelräumer und seine Verwendung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1701427A (en) * 1927-02-23 1929-02-05 Bert Russell Rotary drilling and reaming tool organization
FR1427180A (fr) * 1964-12-22 1966-02-04 Lorraine Houilleres Procédé d'alésage et dispositif permettant sa mise en oeuvre
US3967689A (en) * 1974-09-25 1976-07-06 Tidril Corporation Reaming apparatus
US4402372A (en) * 1979-09-24 1983-09-06 Reading & Bates Construction Co. Apparatus for drilling underground arcuate paths and installing production casings, conduits, or flow pipes therein

Also Published As

Publication number Publication date
EP0537624A1 (de) 1993-04-21
ATE134416T1 (de) 1996-03-15
DK0537624T3 (da) 1996-07-08
DE4134095C1 (enrdf_load_stackoverflow) 1992-07-16
ES2086042T3 (es) 1996-06-16

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