EP4413228A1 - Dispositif de forage à expansion - Google Patents

Dispositif de forage à expansion

Info

Publication number
EP4413228A1
EP4413228A1 EP22808968.6A EP22808968A EP4413228A1 EP 4413228 A1 EP4413228 A1 EP 4413228A1 EP 22808968 A EP22808968 A EP 22808968A EP 4413228 A1 EP4413228 A1 EP 4413228A1
Authority
EP
European Patent Office
Prior art keywords
drilling
drill
receiving space
loosened
rock
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
EP22808968.6A
Other languages
German (de)
English (en)
Other versions
EP4413228B1 (fr
EP4413228C0 (fr
Inventor
Lutz zur Linde
Tobias Engel
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.)
Herrenknecht AG
Original Assignee
Herrenknecht AG
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 Herrenknecht AG filed Critical Herrenknecht AG
Publication of EP4413228A1 publication Critical patent/EP4413228A1/fr
Application granted granted Critical
Publication of EP4413228B1 publication Critical patent/EP4413228B1/fr
Publication of EP4413228C0 publication Critical patent/EP4413228C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • E21B10/26—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
    • 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
    • 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
    • E21B7/208—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes using down-hole drives
    • 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
    • E21B47/00—Survey of boreholes or wells
    • 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
    • E21B7/04—Directional drilling
    • E21B7/046—Directional drilling horizontal drilling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/54—Installations characterised by use of jet pumps, e.g. combinations of two or more jet pumps of different type

Definitions

  • the invention relates to an expansion drilling device for expanding a pilot bore drilled from a starting point to a target point in the ground along a specified drilling line, preferably near the surface, by moving the expansion drilling device along the specified drilling line to create a bore in the ground or in a rock for inserting a pipeline or a expansion into the flared bore: with a housing; having a drilling side and having a back side opposite the drilling side; with a drill head which has a cutting wheel which is mounted and driven on the drilling side of the reaming drilling device so as to be rotatable about an axis of rotation and relative to the housing, on which at least one drilling tool for loosening the soil or the rock is arranged; with a drilling-side connection for establishing a connection with a pipe string located in the pilot bore, preferably a pilot drilling string, on the drilling side; with a rear connection for the pipeline to be introduced on the rear of the drill head, with at least one receiving space for the loosened soil or the loosened rock being provided centrally on the drilling
  • a pilot hole is first created using a rotating drill head and drill rods from the starting point towards the target point.
  • the positional accuracy is ensured by a measuring system, which is installed behind the drill head.
  • the mined material is brought to the surface with a bentonite suspension.
  • the bentonite suspension is pumped through the drill pipe directly to the nozzles attached to the drill head.
  • the suspension mixes with the loosened soil and flows back to the starting point through the annulus between the drill pipe and the soil.
  • the drill head is exchanged for a reamer, which then expands the pilot hole while the pipeline is pulled in with it.
  • the HDD method requires the greatest possible laying depths and thus coverings of more than 30m, for example. Laying depths in the area less than 10 m can lead to undesired mud discharges with the conventional HDD method with certain ground conditions.
  • DE2701066A1 A previously described drill head is known from DE2701066A1. This is used to expand a pilot bore in pipe jacking.
  • DE2701066A1 discloses a method and a device for laying pipes underground.
  • a discharge head is used here, with which a pilot hole is widened and to which the pipeline to be inserted is attached.
  • a screw conveyor of a screw conveyor is provided in the pilot pipe string, which conveys away the soil loosened by the knives of the rotating discharge head.
  • the loosened soil enters the conveyor chamber of the screw conveyor through openings.
  • the necessary laying lengths close to the surface cannot be realized with the disclosed method and the disclosed device, especially with relatively small pipeline diameters.
  • the soil that may be heavily mixed in the area near the surface cannot be safely mined and removed with the disclosed method and the disclosed device.
  • the object of the invention is to provide a reaming drilling device with which a near-surface reaming of a pilot bore is also possible in highly heterogeneous soils.
  • At least one crusher is provided in the drilling space, and that the crusher has crushing bars on the rotatable cutting wheel, which move together with the cutting wheel and crushing bars on a side of the receiving space facing the drilling space, which are rigid together with the receiving space are arranged rigidly, and that the breaker bars are arranged relative to each other that there is a crushing gap between the breaker bars.
  • the reaming drilling device can be used near the surface and can widen a pilot bore near the surface and at the same time a pipeline, for example a pipeline for creating a pipeline or a district heating line or a protective pipe for laying power lines or the like, can be introduced into the widened borehole.
  • a pipeline for example a pipeline for creating a pipeline or a district heating line or a protective pipe for laying power lines or the like.
  • the centric receiving space enables easy removal through the pipe string located in the pilot bore, so that the risk of blow-outs, as with the HDD method, is minimized.
  • the provision of the crusher ensures that the loosened soil or the loosened rock is present in grain sizes that can be extracted. Furthermore, this simple construction of the crusher has proven to be surprisingly effective.
  • the receiving space is a hollow cylinder whose end faces are closed.
  • the receiving space is a suction box. It is also advantageous that the at least one discharge opening of the receiving space is arranged on an end face of the hollow cylinder. A suction nozzle is preferably provided at the discharge opening. In this way, the loosened soil/rock can be transported away safely and easily. Furthermore, it has surprisingly been shown that by providing the receiving space as a central hollow cylinder, the receiving space can be designed to be particularly small and stable. Furthermore, efficient suction from the hollow cylinder is possible.
  • the at least one delivery opening is arranged on the outside of the casing of the hollow cylinder, preferably at the top.
  • the loosened soil or the loosened rock can be introduced into the receiving space in a particularly simple and efficient manner.
  • a suction into the receiving space through the receiving opening is possible for support.
  • carriers are provided on the cutting wheel, which move the loosened soil or the loosened rock towards the conveying opening.
  • a further teaching of the invention provides that the receiving space is rigidly connected to the housing. In this way, the necessary forces for expanding and retracting can be transmitted in a simple manner.
  • connection on the drilling side is rigidly connected to the housing or to the receiving space. In this way, the necessary forces for expanding and retracting can be transmitted in a simple manner
  • a further teaching of the invention provides that the at least one conveying opening is a classifying element or that a classifying element is arranged in the at least one conveying opening. This ensures in a simple manner that the loosened soil or the loosened rock only reaches the receiving space in grain sizes that can be removed.
  • a further teaching of the invention provides that the material conveying device of the reaming drilling device has at least one feed pump, the suction side of which is connected to the discharge opening.
  • the at least one feed pump is a jet pump.
  • a jet pump enables efficient suction from the discharge area in a simple manner. Furthermore, it is through the Jet pump possible removal of loosened soil/rock over lengths of 2000m and more with small borehole diameters possible without additional pumps in the pipe string.
  • a further teaching of the invention provides that the rear connection for the pipeline to be introduced into the widened bore is rigidly connected to the housing or to the receiving space.
  • the rear connection has a rotatable section, which enables a relative rotation between the housing of the reaming drilling device and the pipeline to be installed, preferably a hydraulic cylinder.
  • the rear connection has a measuring element for measuring the pull-in force acting on the pipeline to be inserted, preferably a hydraulic cylinder
  • a further teaching of the invention provides that the housing has at least a first section which has a first diameter which is smaller than an inner diameter of the annular cutting wheel and preferably essentially corresponds to the outer diameter of the pipe string located in the pilot well, and a second section which is substantially slightly smaller than the inside diameter of the reamed borehole.
  • a further teaching of the invention provides that at least one delivery opening for delivery of a bentonite suspension into the annular space of the widened bore is provided on the rear side.
  • FIG. 1 shows a schematic representation of a first embodiment according to the invention
  • FIG. 3 shows a schematic representation of a sectional view of an expansion drill head according to the invention
  • FIG. 4 shows a schematic representation of a plan view of an expansion drill head according to FIG. 3
  • FIG. 5 shows a schematic representation of a plan view of a cutting wheel according to the invention in FIG. 3, and
  • FIG. 6 shows a schematic representation of a plan view of a receiving space according to the invention for FIG. 3.
  • FIG. 1 shows a first embodiment of a reaming drilling device 10 according to the invention.
  • This has a housing 11 which is divided into a front section 12 and a rear section 13 .
  • the front section 13 has a first diameter which is identical to the diameter of the pipelines in the pilot well (not shown).
  • the rear section 13 has a second diameter which is slightly smaller than the diameter of a drill head 14 arranged on a drill side 21 of the housing 11.
  • FIG. 2 shows a second embodiment of a reaming drilling device 10 according to the invention.
  • This has a housing 11 that only has the rear section 13 .
  • the front section 13 has a first diameter which is identical to the diameter of the pipelines in the pilot well (not shown).
  • the rear section 13 here has a diameter that is slightly smaller than the diameter of a drill head 14 arranged on a drill side 21 of the housing 11.
  • the drill head 14 has a cutting wheel which, as shown in FIGS. 3 to 6, is preferably designed as a cutting ring 15 .
  • drilling tools 16 for example disc chisels, paring knives, drill bits or the like.
  • the cutting ring 15 is driven by hydraulic motors 17.
  • a hydraulic pump 18 is provided, which is driven by an electric motor 19, for example.
  • a tank 20 for the hydraulic fluid with which the hydraulic pump 18 drives the hydraulic motors 17 is also provided.
  • the drill head 14 is arranged in the drilling side 21 .
  • the housing 11 further includes a rear face 22 on which is disposed a rear stop 23 for connection to downhole tubing (not shown).
  • This can be, for example be a swivel with tensile force measurement, which is preferably designed as a hydraulic cylinder.
  • the cutting ring 15 is connected to a receiving space for receiving the loosened soil or the loosened rock, which is preferably designed as a suction box 24 here.
  • a feed pump which is preferably designed as a jet pump 25 here, is provided for conveying away the loosened soil or the loosened rock.
  • the jet pump 25 can be arranged in the front section 12 of the housing 11 .
  • the feed pump can also be provided in the rear section 13 of the housing 11 .
  • the jet pump 25 has a driving line 26, which is acted upon by a high-pressure pump, not shown.
  • the jet pump 25 has a discharge line 27 via which the liquid supplied with the propulsion line 26 is discharged together with the mixture of liquid and loosened soil/rock extracted from the suction box 24 via a suction line 28 .
  • the suction line 28 is connected to a suction nozzle 29 which is connected to at least one discharge opening 30 of the suction box 24 .
  • a feed line 31 is routed through the front section 12, which supplies the drill head 14 with liquid for supporting the working face and for transporting away the loosened soil/rock in the area of the cutting wheel/cutting ring 15.
  • a lubricating liquid line 32 is provided, which is led to the rear side 22 of the housing 11 .
  • a lubricant is dispensed into the annulus (not shown) which is used to support the wellbore and to reduce friction between the outside of the running tubing (not shown) and the wellbore wall (not shown).
  • a front stop 34 is connected to the suction box 24, as shown in FIG. This preferably has a connection option with the front section 12 . More preferably, the connection between the stop 34 and the front portion 12 is configured to provide angular mobility so that the reamer 10 can better follow the direction of the pilot borehole.
  • stop 34 is used to connect to the tubing in the pilot well.
  • This connection option is also preferably designed in such a way that angular mobility is possible here is given so that the reaming drilling device 10 can better follow the direction of the pilot well.
  • a connecting element 36 is provided at the front end 35 of the front section 12 of the housing 11 with the pilot drill string located in the well.
  • the connecting element 36 is preferably identical to the connecting element of the stop 34.
  • the connecting elements 36 are preferably male or female connecting elements of a push-fit socket connection with high tensile strength. This has circumferential grooves in the contact surfaces of the male and female connecting elements, which form a helical channel which has at least one connecting opening to the outside for the insertion of a shearing element, for example a chain, to establish a longitudinal force fit.
  • a valve 37 in the suction line 28 is closed and the jet pump 25 is started.
  • the reamer 10 is then pulled into the ground/rock by pulling back the pilot drill string with, for example, a jack frame (not shown) to ream the pilot bore.
  • the cutting ring 15 of the drill head 14 rotates.
  • the drilling tools 16 loosen the soil/rock and in this way widen the pilot borehole, preferably to the final size. Multiple flare passes are also possible before the final pipe is pulled in.
  • the valve 37 is opened and the liquid/soil/rock mixture is sucked out of the suction box 24 through the discharge opening 30, the suction nozzle 29 and the suction line 28.
  • the cutting ring 15 is arranged in a drilling space 38 (see FIGS. 3 to 6).
  • the cutting ring 15 has at least one saddle 39 on which drilling tools 16 are arranged. Paring knives or drill bits 40, for example, are arranged on the saddles.
  • the saddles 39 are preferably distributed evenly around the cutting ring 15 .
  • the saddles 39 are preferably designed in such a way that they can take loose soil/rock with them.
  • Drivers 42 are provided on the saddles 39 for example
  • the saddles 39/the drivers 42 transport the loosened soil/rock to the conveying openings 41.
  • the loosened soil/the loosened rock can reach or be sucked into the receiving space/the suction box 24 through these.
  • the conveying openings 41 are or contain classifying elements that ensure that only grain sizes that can be conveyed reach the suction box 24 .
  • the cutting ring 15 preferably has nozzles 43 via which the feed liquid, preferably a bentonite suspension, is discharged into the drilling space 38 .
  • This serves to fill the drilling space 387 with liquid to support the working face and to enable the material transport of the loosened soil/rock in the drilling space 38.
  • the receiving space 24 is preferably designed here as a hollow cylinder.
  • the hollow cylinder has an outer wall 44 in which the delivery openings 41 are provided, preferably in the upper section. Furthermore, the end faces 45 of the hollow cylinder are closed in order to provide the suction box 24 .
  • a breaker 46 is provided in the drilling space 38 .
  • Breaker bars 47 are provided on the rigid outer wall 44 of the receiving space 24 for this purpose. These breaker bars are rigidly arranged in the drilling space 38 .
  • the saddles 39 have a receiving surface 48 which faces towards the rigid breaker bars 47 and on which the breaker bars 49 are provided. Between the rigid crusher bars 47 and the crusher bars 49 rotating with the cutting ring 15, for example in the direction of the arrow A, if these are located radially one above the other, there is a crusher gap 50 which specifies the grain size of the material to be removed.

Landscapes

  • 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)
  • Geophysics (AREA)

Abstract

L'invention concerne un dispositif de forage à expansion destiné à élargir un trou pilote produit à partir d'un point de départ jusqu'à un point cible dans le sol le long d'une ligne de forage spécifiée en déplaçant le dispositif de forage à expansion (10) le long de la ligne de forage spécifiée pour produire un trou dans le sol ou dans la roche pour introduire un pipeline ou un système de support dans le trou élargi, comprenant : un boîtier (11) ; une tête de forage (14) qui comporte une roue de coupe (15) qui est disposée du côté forage (21) du dispositif de forage à expansion (10) de manière à être montée et entraînée en rotation autour d'un axe de rotation et par rapport au boîtier et sur laquelle est agencé au moins un outil de forage (16) pour ameublir le sol ou la roche ; et une liaison côté forage pour produire une liaison à une section de tuyau située dans le trou pilote sur le côté forage. Le côté forage (21) présente au centre au moins une chambre de réception (24) pour le sol ameubli ou la roche ameublie, ladite chambre de réception étant reliée à un dispositif de transport de matière du dispositif de forage à expansion (10) pour le sol ameubli ou la roche ameublie via au moins une ouverture de retrait (30) ; le côté forage (21) présente au moins une chambre de forage (38) qui est équipée de la roue de coupe (15), qui est disposée autour de la chambre de réception (24) ; la roue de coupe (15) a une conception annulaire et est disposée en rotation autour de la chambre de réception centrale (24) ; et la chambre de réception (24) est reliée à la chambre de forage (38) via au moins une ouverture de transport (41) de telle sorte que le sol ameubli ou la roche ameublie peut être transporté dans la chambre de réception (24) à travers l'ouverture de transport (41). Selon l'invention, au moins un broyeur (46) est disposé dans la chambre de forage (38) ; le broyeur (46) comprend des bandes de broyage (49) sur la roue de coupe rotative (15) qui se déplacent conjointement avec la roue de coupe (15) et des bandes de broyage (47) sur le côté de la chambre de réception (24) faisant face à la chambre de forage (38) qui sont disposées de manière rigide conjointement avec la chambre de réception (24) ; et les bandes de broyage (47, 49) sont agencées les unes par rapport aux autres de telle sorte qu'un espace de broyage (50) est produit entre les bandes de broyage.
EP22808968.6A 2021-10-06 2022-10-03 Dispositif de forage à expansion Active EP4413228B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021125909.6A DE102021125909B4 (de) 2021-10-06 2021-10-06 Aufweitungsbohrvorrichtung
PCT/EP2022/077488 WO2023057400A1 (fr) 2021-10-06 2022-10-03 Dispositif de forage à expansion

Publications (3)

Publication Number Publication Date
EP4413228A1 true EP4413228A1 (fr) 2024-08-14
EP4413228B1 EP4413228B1 (fr) 2025-08-06
EP4413228C0 EP4413228C0 (fr) 2025-08-06

Family

ID=84360864

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22808968.6A Active EP4413228B1 (fr) 2021-10-06 2022-10-03 Dispositif de forage à expansion

Country Status (9)

Country Link
US (1) US12571263B2 (fr)
EP (1) EP4413228B1 (fr)
CN (1) CN117881871A (fr)
AU (1) AU2022360081A1 (fr)
CA (1) CA3233837A1 (fr)
DE (1) DE102021125909B4 (fr)
ES (1) ES3041564T3 (fr)
PL (1) PL4413228T3 (fr)
WO (1) WO2023057400A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023183991A1 (fr) * 2022-03-31 2023-10-05 OptionX Holdings Pty Ltd Appareil de microtunnelage
CN119308593B (zh) * 2024-12-19 2025-05-09 种淑婷 一种建筑施工用基坑开挖钻孔装置及方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2874936A (en) * 1957-06-19 1959-02-24 Hooley B Gonzales Apparatus for excavating holes
JPS52105611A (en) 1976-03-02 1977-09-05 Komatsu Mfg Co Ltd Drilling apparatus
DE3620026A1 (de) * 1986-03-15 1987-09-24 Meyer & John Gmbh & Co Verfahren und vorrichtung zum sanieren von kanalisationen o.ae. aus beton- oder steinzeugrohren
NL8802302A (nl) 1988-09-16 1990-04-17 Visser & Smit Bv Werkwijze voor het aanleggen van een buisleiding door een grondmassief.
DE202009018579U1 (de) 2009-11-10 2012-02-29 Heinz Plum Vorrichtung zum Erweitern einer Pilotbohrung im Erdreich
DE102012004762A1 (de) 2012-03-08 2013-09-12 Rüdiger Kögler Vorrichtung zum Aufweiten eines Bohrlochs auf einen größeren Durchmesser und zum gleichzeitigen Verlegen einer Rohrleitung in das aufgeweitete Bohrloch
DE102013000771A1 (de) 2013-01-18 2014-07-24 Herrenknecht Ag Vorrichtung zum Abfördern von Bohrklein

Also Published As

Publication number Publication date
US20250188805A1 (en) 2025-06-12
US12571263B2 (en) 2026-03-10
DE102021125909B4 (de) 2023-11-09
CN117881871A (zh) 2024-04-12
ES3041564T3 (en) 2025-11-12
WO2023057400A1 (fr) 2023-04-13
EP4413228B1 (fr) 2025-08-06
DE102021125909A1 (de) 2023-04-06
PL4413228T3 (pl) 2025-12-15
CA3233837A1 (fr) 2023-04-13
AU2022360081A1 (en) 2024-04-04
EP4413228C0 (fr) 2025-08-06

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