EP2863003A2 - Outil et dispositif d'agrandissement d'un passage existant dans le sol - Google Patents

Outil et dispositif d'agrandissement d'un passage existant dans le sol Download PDF

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Publication number
EP2863003A2
EP2863003A2 EP20140187883 EP14187883A EP2863003A2 EP 2863003 A2 EP2863003 A2 EP 2863003A2 EP 20140187883 EP20140187883 EP 20140187883 EP 14187883 A EP14187883 A EP 14187883A EP 2863003 A2 EP2863003 A2 EP 2863003A2
Authority
EP
European Patent Office
Prior art keywords
region
widening
centering
expansion
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Withdrawn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
EP20140187883
Other languages
German (de)
English (en)
Other versions
EP2863003A3 (fr
Inventor
Dietmar Jenne
Kristijan Biblekaj
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.)
Terra AG fuer Tiefbautechnik
Original Assignee
Terra AG fuer Tiefbautechnik
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 Terra AG fuer Tiefbautechnik filed Critical Terra AG fuer Tiefbautechnik
Publication of EP2863003A2 publication Critical patent/EP2863003A2/fr
Publication of EP2863003A3 publication Critical patent/EP2863003A3/fr
Withdrawn legal-status Critical Current

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    • 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
    • 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
    • E21B10/28—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with non-expansible roller cutters
    • 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

Definitions

  • the invention relates to a widening tool and a device for expanding a passage opening present in the ground.
  • Expansion tools are used to dilate existing through-holes in the ground or to renew ground-laid pipelines.
  • pipes with diameters of up to one meter can be introduced into the soil.
  • Known expansion tools have a connection region, via which a pulling and / or pushing force can be introduced into the expansion tool.
  • known expansion tools have a widening region which has a larger cross-section than the passage opening present in the ground, at least in one subarea.
  • a first pilot hole is introduced into the soil between a starting point and a target point.
  • This pilot hole is preferably introduced into the ground starting from the starting point, which is determined, for example, in a starting pit, up to the target point which has been defined, for example, in a target pit.
  • the pilot hole can be driven in with an earth launcher, flushed out using flushing fluid and / or pushed through the ground with the aid of a linkage.
  • the pilot bores are preferably made with controllable horizontal drilling rigs.
  • this passage opening becomes widened using a widening tool.
  • the expanding tool is connected to the linkage located at the target point of the pilot hole and pulled back to the starting point. Due to the widening region of the expansion tool, which has a larger cross-section than the passage opening present in the ground, at least in a subarea, the cross section of the passage opening present in the ground is increased.
  • FIG. 9 shows a conventional rock scraper, which has three rolling chisel, which are each equipped with carbide pins.
  • Such a rock scraper is usually driven at 30 to 100 rpm, so that the rolling chisels roll on the rock.
  • the contact pressure between the carbide pins and the rock small pieces of rock are broken off, which are then promoted with the help of flushing liquid from the drilling channel.
  • FIG. 10 shows a conventional conical reamer, as it is typically used in loamy, sandy and gravel soils.
  • the expansion process can be done gradually. With the expansion tool of the largest desired diameter, a new tube to be retracted into the passage opening is then connected and drawn into the widened opening at the same time as the expansion process. For example, HDPE pipes or steel pipes are drawn in.
  • Both the pilot bores and the expansion by means of the expansion tool can be liquid-supported, in particular supported by a Betonit Whymaykeit done. With the aid of the rinsing liquid, the excavated soil is discharged from the drilling channel.
  • the pilot bores and the expansion may be made using a tool sold by the assignee under the designation "Terra-Jet" Horizontal drilling be generated.
  • This boring device allows horizontal directional drilling.
  • the drill head with the aid of which the pilot hole is produced, a locatable transmitter, so that its position can be determined exactly. Based on the determined position of the drill head can be controlled so that a desired profile of the through hole to be generated is achieved.
  • a deviation of the course of the widened passage opening with respect to the widened through opening is not desired and can occur when the soil is not homogeneous, i. E. in a mixed ground, namely when the soil consists of clay with stone and / or gravel shots and / or meets the Aufweitwerkmaschine of rock.
  • a flaring tool can be designed as a scraper, which has drivable means for the degradation of the soil.
  • rock clearers are known, which are equipped with three roller bits, which are each equipped with carbide pins. Such rock clearers are rotated at 30 to 100 revolutions per minute. The roller bits roll on the rock. The contact pressure between the hard metal pins of the roller chisel and the rock causes pieces of rock, so-called cuttings, to be broken off, which are then conveyed out of the drilling channel with the help of the rinsing liquid.
  • a drilling head for a vertical bore which consists of webs arranged parallel to the longitudinal axis of the drill head and arranged around the longitudinal axis of the drill head. Because these narrow webs do not form a centering area that is closed all around, they have a small bearing surface with a relatively small centering effect. Furthermore, when using such a vertical drilling head as a horizontal drilling head or expansion tool, there is the risk that the interstices will be added with falling debris so that the rinsing liquid can no longer flow away unhindered.
  • the object of the invention is to provide a widening tool and a device for widening a passage opening present in the ground through which deviations in the course of a widened passage opening can be avoided in a simple manner.
  • the centering region according to the invention effects a positive guidance of the expansion tool. As a result, it is easy to achieve a central widening with respect to the center axis of the through opening to be widened.
  • the dilated through hole has been previously introduced between a starting point and a target point, for example by means of a horizontal bore in the soil. Alternatively, the through-hole may be present through an already laid in the ground, to be replaced old line.
  • the diameter of a tubular centering area substantially corresponds to the diameter of the largest cross-sectional area of the expansion area.
  • the tubular centering region of the expansion tool has a continuous opening running in the direction of movement or parallel to the direction of movement, through which flushing liquid and / or soil present in or in front of the expansion area can pass.
  • this opening is arranged in the interior of the centering region.
  • the provided in the interior of the centering through opening is preferably dimensioned such that the entire soil degraded during the expansion process and the entire introduced during the expansion rinsing liquid can be passed through this opening.
  • the outer lateral surface of the centering region directly adjacent to the ground of the widened opening so that a very good centering of the expansion tool on the centering can be done, especially since no rinsing liquid and no soil outside must be passed along the centering.
  • the soil and / or the rinsing liquid thus preferably passes through the at least one opening provided in the widening region and enters into the through opening of the centering region, the degraded soil and / or the rinsing liquid being passed through the through opening of the centering region.
  • the rinsing liquid and / or a mixture of rinsing liquid and degraded soil flows through the widening region and the centering region and thus through the widening tool.
  • the widening region has at least one opening through which soil and / or rinsing liquid can pass.
  • a rinsing liquid may in particular Betonit, Ejactomer or a mixture of Water, Betonit and / or Ejactomer.
  • the opening provided in or in the direction of movement of the expansion tool in front of the expansion area (downstream of the expansion area) preferably results in a mixture of soil and rinsing liquid. This mixture can then pass through a through opening provided in the direction of movement of the expansion tool in the centering region and emerge from the centering region upstream of the direction of movement of the expansion tool.
  • the tubular centering region may be formed by a cylindrical base body, on the lateral surface of a spiral coil is provided which protrudes from the lateral surface of the cylindrical base body.
  • a spiral spiral rotation of the expansion tool can be generated during its movement or at least favored.
  • a gap can thereby be created between the cylindrical base body and the widened passage opening, through which at least part of the rinsing liquid and / or soil can pass from a region downstream of the expansion tool into a region upstream of the widening region.
  • the front part of a tube forming at least part of the centering section can be designed as a drill bit.
  • carbide cutting edges are attached to this edge, with the help of soil and / or rock can be reduced.
  • the cylindrical region of the centering element is arranged at a distance from the expansion region.
  • the widening region is formed by a rock scraper having at least one roller chisel. Standard rock cutters have two or three roller bits. This can ensure that, if necessary, using the centering disturbing soil or rock can be removed, so that even when using scrapers and a centering area spaced from such a reamer can not deflect the centering area by inhomogeneous soil.
  • At least one cylindrical section of the envelope lateral surface of the centering region has a diameter in the range between 95% and 100% of the diameter of the largest cross-sectional region of the expansion region. This ensures that good guidance of the centering element in the already widened region of the passage opening is possible.
  • the envelope surface of the centering region is the envelope surface around the spiral spiral.
  • the widening region comprises at least one roller bit.
  • rock in the ground in particular rock
  • roller bits for breaking up rock are also referred to as rock clearers.
  • the widening region has two or three roller bits, which are arranged around the central axis of the widening tool or around the central or longitudinal axis running around a direction of movement, preferably at the same angular distance from one another.
  • the roller bit or bits can be driven via a linkage that can be connected to the expansion tool or are particularly advantageous.
  • the entire expansion tool can be rotated about its longitudinal axis.
  • Widening tools with roller bits are also referred to as rock clearers.
  • the expansion area can have a have conical shape, which preferably tapers in the direction of movement.
  • a groove for introducing and / or discharging rinsing liquid can be provided in the widening region. This groove can also be introduced spirally into the expansion area.
  • the widening region can have a plurality of projecting cutting elements, for example in the form of hard metal and / or diamond teeth.
  • the centering region may comprise a cylindrical basic body, preferably a hollow cylinder or tube.
  • the centering region may comprise a plurality of rails whose longitudinal axes each orthogonally intersect a circular path about the central axis of the expansion tool. By such rails, a longitudinal guide of the centering can be effected.
  • a gap can be provided between at least two rails, through which soil and / or rinsing liquid can pass into the interior of the centering region, wherein this soil and / or the rinsing liquid can escape upstream from the centering region or from the expansion tool.
  • the centering region may comprise at least one cylindrical region with a preferably substantially closed lateral surface.
  • the centering element is formed by this cylindrical region.
  • a substantially closed lateral surface may have at least one cutout for mounting elements arranged in the interior of the centering element.
  • Such arranged in the interior of the centering elements may be, for example, connecting elements and / or swivel with a receiving unit for the pipe end of a to be fed into the expanded through-hole pipe.
  • the length of the centering area corresponds to 2 times to 4 times, preferably 2.7 times to 3.3 times, in particular 3 times, the diameter of the largest cross-sectional area of the expansion area.
  • the centering area is non-rotatable with the expansion area. This can be done in particular by means of welding and / or screw connections.
  • the centering area can be arranged freely rotatable relative to the widening area about the longitudinal axis of the through opening to be widened or about the longitudinal axis widening tool. This can be done in particular via a so-called swivel, wherein the one end of the rotation vortex rotatably connected to the Aufweit Schl and the other end of the rotation vortex is rotatably connected to the centering.
  • the two ends of the rotary vortex are freely rotatable relative to each other about the longitudinal axis of the expansion tool or about the longitudinal axis of the through opening to be widened.
  • the widening region and the centering region can be decoupled from one another, so that no rotation of the centering region has to take place, in particular during a rotation of the widening region.
  • the expansion area does not necessarily have to be rotated.
  • a cone-shaped region which is preferably connected to the centering region via a detachable connection.
  • a non-detachable connection for example a welded connection for the connection between the centering region and the conical region.
  • a detachable connection however, allows the exchange of the cone-shaped area, so that the expansion tool is easier to adapt to the particular application.
  • the cone-shaped portion serves to permit easy expulsion of the expander tool through the flared through-hole, if required because of an insurmountable obstacle, separation of the connection of the expander tool with a drive unit, and / or a flare on the expander tool.
  • the conical region has a passage opening through which one end of a tube to be drawn into the expanded through-opening can be guided and / or can exit through the soil and / or rinsing liquid discharged through into the widened region of the through-opening.
  • the widening region has at least one conical section whose smallest cross section can be inserted into the through opening to be widened and whose largest cross section corresponds at least to the cross section of the through opening to be widened.
  • the expansion tool has at least one connecting means for connecting the expansion tool with a pipe to be introduced into the passage opening.
  • the connecting means is arranged on the opposite side of the expansion area of the expansion tool.
  • the connecting means may be freely rotatable to the other elements of the expansion tool, so that the remaining areas of the expansion tool can be rotated without the tube to be introduced is rotated.
  • the connecting region is formed by a connecting element
  • the widening region is formed by a widening element and / or the centering region is formed by a centering element.
  • a second aspect of the invention relates to a device for expanding a passage opening in the ground, which comprises a widening tool according to claim 1 or according to one of the developments described above.
  • the device has a drive unit, which is connected via at least one connecting element with the expansion tool.
  • the drive unit exerts a pulling and / or pushing force on the expansion tool and thereby moves the expansion tool through the through opening to be widened. In this case, the cross section of the passage opening is increased.
  • a simply constructed device is indicated, with the help of existing through holes can be easily expanded in the ground.
  • the connecting element may be formed as a double pipe linkage.
  • the double pipe linkage has a first linkage and a tubular second linkage surrounding the first linkage.
  • the centering region is connected to the first linkage and can be driven by it.
  • the expansion area and / or a clearing element of the expansion area are connected to the second linkage and can be driven by this.
  • the centering region can be connected to the second linkage and can be driven by it, and the expansion region and / or a reaming region of the expansion region can be connected to the first linkage and can be driven by it.
  • the centering area and the expansion area can be rotated at different speeds be driven, the directions of rotation of the linkage may be the same or alternatively opposite.
  • the centering element can cut soil and rock in a drive via the double pipe linkage.
  • About an outside of the centering arranged outwardly projecting spiral spiral is conveyed past the centering element in a rotation of the centering element upstream.
  • the centering area is preferably designed rigid.
  • the centering area is made of metal, in particular of steel.
  • the centering region may comprise a steel pipe section.
  • the bending stiffness of the centering portion is preferably greater than the bending stiffness of the pipe to be recovered.
  • FIG. 1A An arrangement 10 for controlled drilling of a pilot bore is shown.
  • the assembly 10 operates on a horizontal boring process, also referred to as a Horizontal Directional Drilling (HDD) process.
  • a horizontal drilling rig available under the trade name Terra-Jet is used for this purpose.
  • Such a horizontal drilling rig is for example from the document DE 101 15 233 A1 known.
  • a linkage 14 composed of a plurality of linkage sections 13 is introduced into the ground 18 by means of the horizontal boring system 12 at a starting point 16 with a drill head 20 arranged at the end of the linkage 14 opposite the horizontal boron rail 12 in the direction of the arrow P0.
  • the horizontal drilling rig 12 brings flushing liquid into the hollow rod 14 at high pressure.
  • the rinsing liquid exits the drill head 20 at high pressure. Due to the high pressure and hard metal teeth of the drill head 20, a borehole 15 is cut into the ground 18.
  • the drill head 20 is asymmetrically flattened at its front end and is continuously rotated by means of the linkage 14 to produce a straight borehole 15. In a desired lateral movement, upward movement or downward movement of the drill head 20 is stopped in a suitable movement for this desired position and not rotated further, so that due to the asymmetrical flattened shape of the front end of the drill head 20, a corresponding deflection movement of the drill head 20 in the ground 18 takes place ,
  • FIG. 1B is a Detail view of the remote from the horizontal drilling rig 12 end of the linkage 14 together with the drill head 20 shown.
  • an electronic probe is arranged, which can be located with the help of a corresponding locating device at any time from the earth's surface, so that the position of the drill head 20 in the ground 18 can be exactly determined at any time.
  • the trajectory of the boring head 20, and thus the path of the borehole 15 of the pilot bore is simply controlled by controlled stopping of rotation of the boring head 20 via the linkage 14 so that the control surface of the boring head 20 is brought into a position required for the desired movement. Even after the targeted stopping of the rotation of the drill head 20 flushing fluid is further passed through the linkage 14 and the drill head 20 further driven by the linkage, so that the drilling operation of the desired course of the borehole 15 is continued by means of the rinsing liquid and the propulsion of the drill head 20.
  • HDPE pipes are made of high density polyethylene, this high density polyethylene being a high density thermoplastic so that the pipes made of HDPE have high toughness and rigidity, very good chemical resistance, good sliding properties, low density Moisture absorption, very good processing properties, are very good weldable and are physiologically harmless.
  • tubes 26 may be drawn in from other materials, in particular metal.
  • the horizontal drilling rig 12 generates the pulling force required for the expansion process on the linkage 14 and also conducts rinsing fluid to the expansion head 24.
  • the rinsing fluid supports at least the expansion of the pilot hole 15 and also serves to divert and discharge the excess earth 18 dissolved during the expansion process , Scree and rock, at least part of the soil 18 contacted by the expansion tool 24 during the expansion process must be diverted. This can be done, in particular, through the annular gap between the region of the pilot bore already designated as a bore channel and the drawn-in tube 26.
  • the rinsing fluid introduced into the annular gap also reduces the skin friction between the tube 26 and the drilling channel.
  • the expansion tool 24 has a centering portion 40 which is upstream with respect to the Aufweit Scheme 31 of the expansion tool 24 in the direction of movement of the expansion tool 24 and substantially corresponds to the diameter of the widened opening.
  • the expansion tool 24 has a large support surface via the centering region 40, via which a counterforce to the transverse forces acting on the widening region 31 transversely to the movement direction P1 can be provided.
  • a deflection of the expansion tool 24 is effectively avoided in a simple manner, so that the pilot bore or a passage opening already present in the ground 18 can be widened centrally by means of the expansion tool 24 according to the invention.
  • the new pipe 26 to be laid in this case an HDPE pipe, is used.
  • two or more expansion tools 24 in succession, up to a diameter of 1000 mm are used.
  • tubes 26 are retracted to a diameter of 800 mm or a tube bundle of several tubes.
  • a rinsing liquid water with Betonit or Ejactomer can be used.
  • Such rinsing fluids stabilize the drill channel, reduce the friction between drill pipe 14 and soil 18 and the friction between the pipe 26 to be recovered and the soil 18. Further, 18 is conveyed out through the already partially retracted pipe 26 from the drilling channel using the rinsing liquid soil.
  • FIG. 1D shows an enlarged section of the in Figure 1C arrangement shown in this section 10. The remote from the horizontal drilling rig 12 end of the linkage 14, the expansion tool 24 and the already partially retracted into the ground 18 tube 26 are shown.
  • FIGS. 2 to 8 Various embodiments of the expansion tool 24 will be described. Identical elements are provided with the same reference numerals. Elements with the same function are designated with the same reference numerals and a lower case associated with the embodiment.
  • FIG. 2 1 shows a widening tool 24a according to a first embodiment, which has a connecting region 30a for connecting the widening tool 24a to the end of a rod 14 remote from the horizontal drilling rig 12.
  • the expansion tool 24a is designed as a rock clearer, wherein the expansion tool 24a for this purpose has three roller bits 32 to 36, which are rotated by a rotational movement of the rod 14 about the longitudinal axis 38 of the expansion tool 24a.
  • the roller bits 32, 34, 36 roll off the earth 18 to be expanded.
  • the roller bits 32, 34, 36 are each equipped with hard metal pins and are rotated at preferably 30 to 100 revolutions per minute about the longitudinal axis 38 of the expansion tool 24a.
  • a tubular centering element 40 forming a centering area, at the rear end of which a cone 42 is arranged.
  • the cone 42 allows, if necessary, a simple withdrawal of Aufweitwerkmaschines 24 a, if the expansion process must be canceled.
  • a connecting element 44 is provided in the interior of the centering element 40, which is arranged freely rotatable relative to the widening region 31a and the connecting region 30a via a so-called rotating vortex 46.
  • this connecting element 44 is a simultaneously with the expansion process in the expanded passage opening to be recovered pipe 26 connectable, wherein the swivel 46 causes that upon rotation of the widening 31a via the linkage 14 no rotation of the recovering pipeline 26 takes place.
  • the cone 42 are non-rotatably connected to the centering element 40 and the centering element 40 rotatably connected to the widening portion 31a and the connecting portion 30a.
  • the centering element 40 may be freely rotatable relative to the widening region 31a and the connection region 30a.
  • the cone 42 may be rotatable relative to the centering element 40.
  • a mounting opening 48 is provided, can be introduced and mounted by the connecting elements for connecting the pipe 26 to be recovered with the connecting element 44 of the expansion tool 24a.
  • Open cross-sectional areas 33, 35, 37 are present between the roller bits 32 to 36, through which flushing fluid present in the widening area 31a can enter into an inner cavity 47 of the centering element 40 together with degraded earth 18. If the end of a pipeline 26 to be recovered is arranged in the centering element 40, then a large part of the flushing liquid, together with the excavated earth, enters the annular gap between the pipeline 26 and the borehole channel.
  • an expansion tool 24b according to a second embodiment is shown.
  • the expansion tool 24b is also designed as a rock scraper and has in the same way as the expansion tool 24a in Aufweit Scheme 31a three roller bits 32 to 36, which are driven by the outer linkage of a double pipe linkage 14 in the second embodiment.
  • the connecting region 30b for connecting the expansion tool 24b can be connected to the end of the double pipe linkage 14 remote from the horizontal drilling rig 12.
  • the inner linkage and the outer linkage with different speeds in the same direction or different directions of rotation can be driven.
  • the inner linkage is connectable to an inner drive member 50 and the outer linkage to an outer drive member 52 of the connection portion 30b.
  • the inner drive element 50 is non-rotatably connected to the centering element 40, so that the centering element 40 can be rotated by the inner linkage via the inner drive element 50 of the expansion tool 24b.
  • the connecting element 44 is over the pivoting vane 46 freely rotatably disposed both relative to the centering element 40 and with respect to the widening region 31a.
  • the cone 42 may be rotatably connected to the centering element 40 or be freely rotatable relative to the centering element 40.
  • FIG. 4 is a front perspective view of the expansion tool 24b after Figure 3 shown.
  • the open areas 33, 35, 37 between the roller bits 32, 34, 36 and connecting rods 54, 56, 58 for connecting the inner drive element 50 to the centering element 40 are clearly visible.
  • large cross-sectional areas 33, 35, 37 for the passage of the rinsing liquid to be derived and the earth segments to be discharged are present.
  • FIG. 5 shows a widening tool 24c according to a third embodiment.
  • This expansion tool 24c is designed as a conical reamer, which is preferably used for widening through holes in soil 18 made of clay, sand and gravel.
  • a widening tool 24c is provided with a conical thread 62 for connection to the linkage 14.
  • a plurality of carbide teeth are arranged for the degradation of soil 18, of which a tooth is designated by the reference numeral 64.
  • a plurality of helical grooves 66, 68 are provided, through which the degraded earth 18 and the introduced rinsing liquid can be removed.
  • the rinsing liquid is supplied via the linkage 14 and passes to openings which in the present embodiment are provided in the helical grooves 66, 68 are made.
  • the helical grooves 66, 68 are guided to the connection point of the widening region 31c with the centering element 40, so that the rinsing liquid and the soil to be removed 18 pass through the helical grooves 66, 68 into the interior 47 of the centering element 40 and, as previously, in conjunction with the first and described second embodiments, enter into a pipe 26 to be recovered or exit through the opening 43 of the cone 42.
  • the connecting element 44 is also a in FIG. 5 invisible turning swivel rotatably disposed opposite the Aufweit Scheme 31c.
  • the centering element 40 and the cone 42 are rotatably connected to the expansion region 31c.
  • the centering element 40 and / or the cone 42 can be freely rotatable to the widening region 31c.
  • an expansion tool 24d according to a fourth embodiment is shown.
  • the widening region 31d of the widening tool 24d is designed as a so-called drum remover.
  • the expanding tool 24d has a connecting portion 30d for connecting the expanding tool 24d to the linkage 14.
  • a plurality of teeth 18 for removing soil 18 are arranged, a tooth of which is designated by the reference numeral 70.
  • the rinsing liquid exits from two opposite openings 72.
  • the rinsing liquid and ground loosened by means of the teeth 70 are conducted via openings 74 to 78 into the interior 47 of the centering element 40 and exit from the end facing away from the widening region 31d.
  • FIG. 7 An expander tool 24e according to a fifth embodiment of the invention is shown. Structure, function and drive substantially coincide with the expansion tool 24b according to the second embodiment.
  • a helical elevation 80 is provided on the lateral surface of the centering element 40, which upon rotation of the centering element 40 via the inner drive member 50 soil and / or rinsing liquid, which is located between the centering element 40 and the widened bore, to the widening region 31a opposite end of the expansion tool 24e out moves.
  • the helical elevation is also referred to as helix 80.
  • a plurality of spiral coils may be provided, which preferably have a parallel pitch curve.
  • a plurality of hard metal plates are arranged on the front edge of the centering element 40 in the conveying direction P1.
  • the front end of the centering element 40 is designed as a ring bit and can be cut through earth and rock during a rotational movement via the inner drive element 50.
  • the hard metal plates 82 are also referred to as incisors.
  • FIG. 8 is a sectional view of the expansion tool 24e shown.
  • the spiral spiral 80 may be welded onto a tube forming the centering element 40.
  • the tube may be made together with the spiral helix as a casting.
  • Expander tools shown can each instead of the expansion tool 24 in the arrangement of the FIGS. 1a to 1d be used.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (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)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
EP14187883.5A 2013-10-15 2014-10-07 Outil et dispositif d'agrandissement d'un passage existant dans le sol Withdrawn EP2863003A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201310111350 DE102013111350A1 (de) 2013-10-15 2013-10-15 Aufweitwerkzeug und Vorrichtung zum Aufweiten einer im Erdreich vorhandenen Durchgangsöffnung

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EP2863003A2 true EP2863003A2 (fr) 2015-04-22
EP2863003A3 EP2863003A3 (fr) 2016-01-13

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108049812A (zh) * 2018-01-30 2018-05-18 安徽创奇监测设备有限公司 一种气动旋转导向推进钻机
CN112459739A (zh) * 2020-12-16 2021-03-09 南智（重庆）能源技术有限公司 油气井可变径钻铣器
EP3940192A1 (fr) 2020-07-17 2022-01-19 Max Wild GmbH Procédé de préparation ou de production un forage dans un sol

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DE102019106486A1 (de) 2019-03-14 2020-09-17 TERRA AG für Tiefbautechnik Bohrvorrichtung
CN111350461B (zh) * 2020-05-09 2020-12-15 安徽建筑大学 一种水平定向钻用扩孔装置

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EP3940192A1 (fr) 2020-07-17 2022-01-19 Max Wild GmbH Procédé de préparation ou de production un forage dans un sol
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