EP3770375A1 - Tête de forage autonome - Google Patents

Tête de forage autonome Download PDF

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Publication number
EP3770375A1
EP3770375A1 EP20185654.9A EP20185654A EP3770375A1 EP 3770375 A1 EP3770375 A1 EP 3770375A1 EP 20185654 A EP20185654 A EP 20185654A EP 3770375 A1 EP3770375 A1 EP 3770375A1
Authority
EP
European Patent Office
Prior art keywords
drill head
housing
head tip
spacer
tip
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Withdrawn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
EP20185654.9A
Other languages
German (de)
English (en)
Inventor
Meinolf Rameil
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.)
Tracto Technik GmbH and Co KG
Original Assignee
Tracto Technik GmbH and Co KG
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 Tracto Technik GmbH and Co KG filed Critical Tracto Technik GmbH and Co KG
Publication of EP3770375A1 publication Critical patent/EP3770375A1/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Withdrawn legal-status Critical Current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
    • E21B10/36—Percussion drill bits
    • E21B10/40—Percussion drill bits with leading portion
    • 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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/02—Fluid rotary type 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
    • 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
    • E21B10/00—Drill bits
    • E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
    • 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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/06—Down-hole impacting means, e.g. hammers
    • E21B4/14—Fluid operated hammers
    • E21B4/145—Fluid operated hammers of the self propelled-type, e.g. with a reverse mode to retract the device from the hole
    • 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
    • E21B7/26—Drilling without earth removal, e.g. with self-propelled burrowing devices

Definitions

  • the invention relates to a self-propelled drill head for drilling in the earth by means of a multi-stage method, a use of a spacer in a self-propelled drill head and a method for converting a self-propelled drill head for drilling in earth.
  • self-propelled drill heads in the form of ram boring devices or earth rockets with which earth drilling can be carried out are known.
  • the self-propelled drill heads usually have a drill head tip designed as a chisel, which is arranged in a housing and is acted upon at the end by a percussion piston, wherein the drill head tip can be arranged longitudinally movable in the housing.
  • the percussion piston hits the drill head tip and at the same time hits the housing.
  • the percussion piston first hits the drill head tip, which runs ahead in the first cycle.
  • the housing is (only) acted upon indirectly or directly by the percussion piston in a subsequent cycle, in particular in the second cycle.
  • a percussion head which has a chisel with a percussion point for contacting the soil at one end and an anvil for impact by means of a percussion piston at the other end.
  • the chisel is arranged in a hole in a base, which also serves as an adapter for screwing into an impact device body.
  • the invention is based on the object of being able to use a self-propelled drill head more flexibly by the user, which means a clear added value for the user.
  • the core idea of the invention is to create a convertible drill head in which the longitudinally movable or axial movement possibility of a drill head tip in the housing is reduced or prevented in order to essentially fix the drill head tip in the housing.
  • the step that the percussion piston hits the drill head tip and the drill head tip in turn hits the housing later take place together and essentially simultaneously the percussion piston acts on the drill head tip on the housing directly or indirectly via the drill head tip.
  • Fixing the drill head tip in the housing so that the drill head tip is in contact with the housing reduces the number of steps or cycles.
  • a microscopic possibility of movement in the longitudinal axial direction is irrelevant. It is essential that the longitudinal axial mobility is reduced.
  • the invention has broken with the consideration that a component is required for setting and thus reducing the number of steps or cycles, which requires very tight and thus expensive manufacturing tolerances so that no play in the drill head tip can occur.
  • the advantage has been broken that also a very small play of such a component leads to damage or destruction due to the permanent impact.
  • the invention now provides a spacer by means of which the drill head tip is in contact with the housing in order to bridge the distance between the drill head tip and the housing that is usually present in a multi-stage process. Due to the especially direct contact between the drill head tip and the housing by means of the spacer, the impact of the percussion piston is also transmitted to the housing directly in the cycle or the stage in which the percussion piston hits the drill head tip.
  • a reduction in the steps or a reduction in the timing is not only a complete elimination of a stage or a timing, but in particular relates to a reduction or reduction in the longitudinal mobility of the drill head tip relative to the housing.
  • the aim is to suppress the mobility of the drill head tip with respect to the housing, a reduction in mobility is sufficient to assume a reduction in the number of stages or the timing.
  • the distance between the mutually facing stop surfaces of the drill head tip and the housing, which interact in a multi-stage process, and in particular are pressed apart by means of a spring, can be reduced or minimized or even completely eliminated that the impact energy of the percussion piston on the end of the drill head tip can be transmitted essentially directly to the housing via the stop surfaces of the drill head tip and housing, which are in particular in contact, without the drill head tip running ahead - possibly with an attachment.
  • a longitudinal mobility of the drill head tip in the millimeter range, in particular 1 mm to 5 mm, usually provided in a multi-stage process can range from 0 mm to 1 mm, particularly preferably 0 mm to 0.75 mm, particularly particularly preferably 0 mm to 0.5 mm, more particularly preferably 0 mm to 0.4 mm, very particularly preferably 0 mm to 0.3 mm.
  • the longitudinal mobility between the drill head tip and the housing can be reduced or reduced to essentially 0 mm by means of the spacer. By means of the spacer, the drill head tip can be in constant contact with the housing during operation by means of the associated stop surfaces.
  • the invention provides a self-propelled drill head for drilling in the ground by means of a multi-stage method, the drill head having a housing and one in the Housing arranged drill head tip, and a spacer is provided on the drill head tip, by means of which the drill head tip is in contact with the housing in order to change the multi-stage method to a method with a reduced number of stages.
  • soil in the sense of the present description includes in particular any type of material, in particular earth, sand, rock, rock and mixed forms thereof, in the existing or to be created, preferably at least partially horizontal, channels or bores, in particular earth channels including earth bores , Rock boreholes or underground lines as well as underground or above-ground pipelines and water channels that can be created or pulled into the ground by using a suitable device for drilling.
  • a “device for drilling in the ground” is understood to mean any device which moves in particular a drill string comprising rod sections in an existing or to be created channel in the ground in order to create or expand a bore, in particular a horizontal bore (HD), or pipelines or others pulling long bodies into the ground.
  • the device for drilling in the ground can in particular be a high-pressure device.
  • a device for drilling in the ground can thus be a device driving a drill string, which works in a soil displacement manner and introduces the drill string into the soil in a translatory and / or rotary manner in the longitudinal axial direction of the drill string.
  • a borehole can be drilled into the earth by applying tension or pressure to the drill string.
  • HD horizontal drilling
  • vertical drilling in the context of the present description includes in particular an at least partially horizontally arranged bore or channel or pipeline.
  • self-propelled drill head comprises a drill head which is designed in the form of a ram drilling device or a rocket.
  • earth rocket is essentially used synonymously with the term ram drilling device.
  • the self-propelled drill head comprises a self-propelled impact device which works in a soil displacement manner and which can strike a bore, a line and / or a pipe in the ground.
  • self-propelled drill head encompasses earth displacement devices in which the drill head tip can be arranged longitudinally movable in a housing and can be acted upon by a percussion piston at the end.
  • the drill head tip can in particular be a chisel.
  • a self-propelled drill head can in particular be a two-stage or two-cycle device.
  • One embodiment of the self-propelled drill head as a three-stage or three-cycle device is also possible.
  • the devices a distinction is made in the steps or cycles according to the order or sequence in which a percussion piston hits the drill head tip and the housing.
  • the percussion piston hits the drill head tip and at the same time hits the housing.
  • the percussion piston first hits the drill head tip, which runs ahead in the first cycle.
  • the housing is acted upon by the percussion piston in a subsequent cycle, in particular in the second cycle.
  • Tip resistance and skin friction are separated in a multi-cycle device, and alternately more easily overcome.
  • better energy conversion can take place, which in particular facilitates the breaking up of obstacles as a result of the concentration of the impact pulse on the drill head tip.
  • the housing remains in a quiet position and thereby ensures relatively good running stability.
  • the term "drill head tip” in the sense of the description is an element on the drill head side which has an outwardly directed or exposed end which comes into contact with the ground during drilling.
  • the tip of the drill head forms the front area of the drill string which, for the introduction of the earth bore or line into the earth, first comes into contact with the earth to be displaced.
  • the outwardly directed end of the drill head tip can have a striking tip, which in particular can have a step geometry and preferably has a cutting edge.
  • the drill head tip can have a non-tapered front-side geometry.
  • the drill head tip can in particular be a chisel.
  • the drill head tip can have an end facing a percussion piston, on which the percussion piston can strike (anvil-side end of the drill head tip).
  • the drill head tip can have an attachment axially fixed with respect to the drill head tip, in particular a stepped attachment.
  • the drill head tip can have an attachment that is axially displaceable with respect to the drill head tip, in particular a stepped attachment.
  • the drill head tip can be prestressed in the housing by means of a spring arranged in particular in an annular space between the drill head tip and the housing, in order to hold the drill head tip in its basic position or to move it back into it.
  • the drill head tip can be an element with which the displacement work of the device for drilling in earth can be carried out on the front side of the drill string.
  • the drill head tip is not necessarily made in one piece.
  • the drill head tip can also be formed from several segments that are arranged one behind the other in the longitudinal direction.
  • the drill head tip is in one piece at least in Area of the housing formed. If there are attachments on the drill head tip, they can be designed as detachable attachments.
  • the housing in the sense of the description can be tubular at least in sections.
  • the housing can have any cross section, which can in particular be round, circular and / or elliptical.
  • the housing preferably has a channel which extends longitudinally through the housing and in which the drill head tip can be arranged.
  • the longitudinal extension of the housing and the longitudinal extension of the drill head tip can correspond.
  • a percussion piston can also be arranged in the housing, in particular if the device for drilling in the ground is a ram drilling device. It is possible that the housing in which the drill head tip and / or the percussion piston can be arranged can be connected to a further housing (a rear housing) in which the percussion piston - in the case of a ram drilling device - is arranged.
  • housing is connected to a further (rear) housing in that, for example, a percussion piston is arranged which can act on the drill head tip
  • a structuring for connection in particular arranged at the end, can be provided on the housing for the drill head tip is designed to structure the housing for the percussion piston.
  • the term housing can encompass a solid casing, in particular made of metal, in particular steel, which surrounds the drill head tip at least in sections on the circumferential side.
  • the housing can in particular be a part of a housing of a ram drilling device which can be connected to the housing in which the percussion piston is arranged.
  • the housing can be a so-called front housing, which can be connected to the housing for the percussion piston, for example by means of screwing, gluing, shrinking, welding or a combination of the aforementioned methods. If the housing is a section of a housing which can be connected to the housing in which the percussion piston is arranged, the housing in the connection area can have a smaller cross section than the housing in which the percussion piston is arranged. The housing in which the drill head tip is arranged can be inserted into the housing in which the percussion piston is arranged.
  • the housing in which the drill head tip is arranged is inserted into the housing in which the percussion piston is arranged, the insertion can result in the drill head tip also - at least at the end or partially - in the housing, in which the percussion piston is arranged, is arranged.
  • the term “spacer” includes an element for bridging a distance or a spacing between the housing and the drill head tip.
  • the spacer can in particular be disk-shaped and can be used as a spacer disk be trained; However, in contrast to the consideration commonly associated with the term “spacer”, that a very precise and precise production is necessary, a time-consuming and cost-intensive adaptation is not necessary.
  • the term “spacer” is used here synonymously for an element bridging a distance between the drill head tip and the housing.
  • a spacing provided between assigned stop surfaces on the drill head tip and the housing can be reduced or eliminated. The distance or the spacing can in particular be bridged against a bias which can keep the stop surfaces at a distance or spacing.
  • spacer also includes an initially at least partially not “lumpy” or spatially fixed material which can be arranged at the drill head tip in order to reduce the distance or the spacing between the stop surfaces.
  • the spacer can, for example, at least partially by filling and curing an initially non-solid, in particular liquid or fluid. Materials to be trained if necessary. If it is described in the description to form a spacer at least partially by means of a non-solid material, this is understood to mean that in addition to the non-solid material, further, in particular solid material or other non-solid or solid materials can be used for the formation.
  • the drill head tip can be fixed or clamped in the housing in a front position against the spring preload. While the spring can separate the drill head tip from the section of the housing on which the drill head tip can strike by means of the spring force, the spacer causes the drill head tip to be fixed or clamped in a forward position.
  • a position of the drill head tip can be referred to as a front position in which the drill head tip is at a greater distance from the percussion piston or a distance between the drill head tip and a section of the housing on which the drill head tip can strike is reduced or minimized.
  • the drill head tip can be pulled out of the housing and the spacer inserted in order to hold the drill head tip in the front position against the action of the spring preload.
  • the spacer can clamp the drill head tip circumferentially by means of a press fit by pressing the spacer around the drill head tip and the spacer rests on the housing at the rear (facing away from the exposed end of the drill head tip or facing the percussion piston).
  • the housing has a receiving space in which the drill head tip can be arranged.
  • the receiving space surrounds the drill head tip at least in sections circumferentially, so that a longitudinal axial guidance is given.
  • the receiving space can be a space that is easy to produce and can be formed, for example, by means of a recess in the housing.
  • the receiving space can be formed by means of turning, milling, drilling, electrical discharge machining, etc.
  • the housing with the drill head tip can be covered or closed at the front by an attachment arranged on the drill head tip.
  • Such an attachment can be fastened to the drill head tip at a predetermined position by means of one or more fastening bolts.
  • An attachment covering the receiving space on the front side can encompass the housing on the front side.
  • a seal can be present between the housing and the attachment which creates a seal against particles and / or fluid in the contact area between the housing and the attachment. In this way it can be ensured, for example, that no dirt or the like can penetrate into the receiving space.
  • a bearing in particular a bush-like bearing, which is designed as a sliding bushing, for example, can also or alternatively be provided for guidance in the housing.
  • the bearing can be a tubular component which is arranged in the receiving space, in particular in a front region of the receiving space, and which receives the drill head tip with a substantially precise fit. Simple handling and manufacture of the device can be achieved in that the bearing is designed in one piece in the form of a bush. As such, the bearing can easily be removed and replaced again.
  • the bearing can in particular be arranged in the receiving space and designed in such a way that only sliding surfaces for the drill head tip are exposed.
  • the bearing can be designed without a stop surface which is oriented transversely to the longitudinal axis of the drill head tip.
  • the drill head tip and the bearing can only have pairs of contact surfaces which are essentially aligned along the longitudinal axis of the drill head tip.
  • An end of the bearing facing the percussion piston can be present in the receiving space without impinging on another element of the drill head, in particular the drill head tip.
  • the bearing can essentially only be acted upon or come into contact with outer surfaces of the drill head tip aligned along the longitudinal axis of the drill head tip.
  • the bearing has a material different from the drill head tip.
  • the material or the material for the bearing is selected to be “softer” than the material or the material of the drill head tip so that the wear occurs predominantly on the bearing.
  • the bearing comprises bronze, ie a tin alloy, White metal, ie a lead-tin alloy, a bearing metal alloyed with lead, an aluminum alloy, a plastic, for example PTFE, a ceramic that can be fiber-reinforced, or a brass alloy. There are great empirical values with the aforementioned materials, so that handling can be simplified.
  • the spacer rests against a front area of the housing. This allows easy access to the drill head tip.
  • the arrangement at the front of the housing means that serious reconstruction measures and / or dismantling of the drill head are unnecessary.
  • the spacer can be arranged in an area in which the drill head tip emerges from the housing.
  • the drill head tip is pretensioned by means of the spacer.
  • the spacer exerts a force on the drill head tip, which means that the drill head tip is deflected in the housing in relation to a normal position in the multi-stage process.
  • a compression spring provided for the possible return of the drill head tip to the starting position after being acted upon by means of the percussion piston can be deflected by means of the spacer from its "rest position", in which no force acts on the compression spring; the drill head tip is then in its "rest position” also in a different position compared to the multi-stage process.
  • the compression spring can thus be brought into a starting position by means of the spacer in which the compression spring has a shorter length than in the case in which the spacer is not present.
  • the spacer has an elastic plastic.
  • the elasticity of the spacer can be used with a slight excess to fix the drill head tip and / or to deflect it with respect to the rest position compared to the multi-step method.
  • the elasticity allows a spacer to be built in with a greater manufacturing tolerance while still fixing the drill head tip.
  • a possible material for the spacer is a plastic, in particular polyurethane.
  • the plastic can be reinforced with fibers and / or metal. It is also possible to introduce an elastic filler or plastic that hardens and forms part or all of the spacer.
  • a spatially fixed shape of the spacer can simplify the removal of the spacer.
  • An initially non-three-dimensional solid material which only takes on or retains the three-dimensional shape after hardening, can offer the advantage that the spacer can be freely adaptable to different sizes of drill head tips and / or housings.
  • the spacer is arranged in an intermediate area between the housing and an attachment.
  • a particularly simple type of conversion can be produced in that the attachment is removed, the spacer is added to the front end of the housing and the attachment is replaced.
  • the invention thus creates not only a possibility of conversion, but also a simple configuration of the conversion.
  • the spacer is arranged in a ring around the drill head tip, so that the spacer can also have a particularly simple design. This can also improve handling.
  • the spacer can attack the drill head tip in a ring shape and attach to the original design of the drill head tip - without any change. A self-centering and simple conversion or arrangement of the spacer is possible through an annular configuration of the spacer.
  • the spacer can be designed in one or more parts.
  • a multi-part design of the spacer allows the spacer to be adapted to different sizes of drill head tips.
  • the invention also provides for using a spacer in a self-propelled drill head.
  • the drill head is designed for drilling in the ground according to a multi-stage process.
  • the drill head has a housing and a drill head tip arranged in the housing.
  • the spacer is used on the drill head tip. By means of the spacer, the drill head tip is in contact with the housing and the drill head is used in a cycle process which is reduced by one cycle compared to the multi-cycle process.
  • the invention also provides a method for retrofitting a self-propelled drill head for drilling in the earth according to a multi-stage process.
  • the drill head has a housing and a drill head tip arranged in the housing.
  • the housing is opened and a spacer inserted, whereby the housing is closed again.
  • the spacer is in contact with the drill bit tip and the housing to reduce the multi-step process in terms of its steps.
  • the naming of a numerical value includes not only the actual numerical value, but also - in order to take account of manufacturing tolerances in particular - a range around the specific numerical value that is +/- 15%, preferably +/- 10%, of the specified numerical value can.
  • Fig. 1 shows, in a partially sectioned illustration, a front area of a drill head 1 for drilling in the ground.
  • the drill head 1 has a drill head tip 2 and a housing 3 in which the drill head tip 2 is arranged.
  • a bearing 6 is provided in which the drill head tip is mounted.
  • the drill head tip 2 is held in the housing 3 so that it can move longitudinally along the longitudinal axis marked L.
  • a compression spring 4 is provided between the housing 3 and the drill head tip 2, by means of which the drill head tip 2 is kept at a distance from a stop surface 5 on the housing 3.
  • the housing 3 is used as a front housing in a housing 7 in which an impact piston 8 is arranged.
  • the drill head tip 2 has an exposed end 9 which can come into contact with the ground.
  • an anvil is formed at the end which can be acted upon by the percussion piston 8.
  • the drill head 1 shown can be operated in several operating modes which differ in terms of the steps or timing.
  • the percussion piston 8 hits the anvil of the drill head tip 2 at the end 10, so that the drill head tip 2 is first moved until the drill head tip 2 with its stop surface 11 hits the stop surface 5 of the housing 3 (see also Fig. 2 ). Only then is the entire drill head 1 driven forward by the residual impact energy of the percussion piston 8 via the housing 3. During the backward movement of the percussion piston 8, the drill head tip 2 is returned to the starting position by the compression spring 4.
  • a spacer 12 is provided, by means of which the drill head tip 2 can be brought into contact with the housing 3. While in the multi-stage process, the spacer 12 is not available ( Fig. 2 ), the spacer 12 causes a reduction in the number of stages or the number of stages or timing.
  • the spacer 12 holds the compression spring 4 under increased continuous tension and compensates for the play between the stop surface 5 of the housing 3 and the stop surface 11 of the drill head tip 2.
  • the spacer keeps the stop surface 5 of the housing in contact with the stop surface 11 of the drill head tip 2 ( Fig. 3 ). If the percussion piston 8 strikes the end area of the drill head tip 2 designed as an anvil, the entire impact energy of the percussion piston 8 is essentially immediately transmitted via the housing 3 in order to move the entire drill head 1 forward.
  • the spacer 12 is in the Fig. 1 illustrated drill head 1 designed for the one-step process.
  • the drill head tip 2 is arranged in the receiving space 13 of the housing 3, the receiving space 13 being oversized with respect to the circumference of the drill head tip 2.
  • the drill head tip 2 is contacted by means of the bearing 6, which ensures the entire mounting of the drill head tip 2 in the housing 3.
  • the drill head 1 has at the front end of the housing 3 an attachment 14 which can be connected to the housing 3 and which is designed in two parts in the exemplary embodiment shown.
  • the first part 15 of the attachment 14 covers the front area of the housing 3.
  • the first part 15 of the attachment 14 can be fixed or fixed on the drill head tip 2 by means of dowel pins 17.
  • an annular circumferential seal 18 is provided in the housing 3, which is arranged in a corresponding groove 19 of the housing 3.
  • a second part 16 of the attachment 14 is also fixed or fixed on the drill head tip 2 by means of dowel pins 17.
  • the second part 16 of the attachment 14 has cutting edges.

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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)
EP20185654.9A 2019-07-24 2020-07-14 Tête de forage autonome Withdrawn EP3770375A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019005132.7A DE102019005132B4 (de) 2019-07-24 2019-07-24 Selbstgetriebener Bohrkopf

Publications (1)

Publication Number Publication Date
EP3770375A1 true EP3770375A1 (fr) 2021-01-27

Family

ID=71614736

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20185654.9A Withdrawn EP3770375A1 (fr) 2019-07-24 2020-07-14 Tête de forage autonome

Country Status (3)

Country Link
US (1) US11346155B2 (fr)
EP (1) EP3770375A1 (fr)
DE (1) DE102019005132B4 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4116539A1 (fr) * 2021-07-05 2023-01-11 TRACTO-TECHNIK GmbH & Co. KG Tête de perçage d'une tari?re, procédé de fabrication d'une tête de perçage d'une tari?re et utilisation d'une tête de perçage d'une tari?re

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3797586A (en) * 1971-12-20 1974-03-19 Bell Telephone Labor Inc Mole with decoupled nose and body
US4100980A (en) * 1975-05-31 1978-07-18 Jenne & Strahm Ag Fur Tiefbautechnik Self-propelled pneumatic burrowing device
DE3724619A1 (de) * 1987-07-25 1989-02-02 Schmidt Paul Rammbohrgeraet
DE10112985A1 (de) 2001-03-17 2002-10-02 Tracto Technik Schlagbohrkopf

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5226487A (en) * 1990-02-07 1993-07-13 Mbs Advanced Engineering Systems Pneumopercussive machine
DE102010015465A1 (de) * 2010-04-16 2011-10-20 Tracto-Technik Gmbh & Co. Kg Erdbohrvorrichtung
DE102014016154A1 (de) * 2014-11-04 2016-05-04 Tracto-Technik Gmbh & Co. Kg Rammbohrvorrichtung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3797586A (en) * 1971-12-20 1974-03-19 Bell Telephone Labor Inc Mole with decoupled nose and body
US4100980A (en) * 1975-05-31 1978-07-18 Jenne & Strahm Ag Fur Tiefbautechnik Self-propelled pneumatic burrowing device
DE3724619A1 (de) * 1987-07-25 1989-02-02 Schmidt Paul Rammbohrgeraet
DE10112985A1 (de) 2001-03-17 2002-10-02 Tracto Technik Schlagbohrkopf

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4116539A1 (fr) * 2021-07-05 2023-01-11 TRACTO-TECHNIK GmbH & Co. KG Tête de perçage d'une tari?re, procédé de fabrication d'une tête de perçage d'une tari?re et utilisation d'une tête de perçage d'une tari?re
US11970909B2 (en) 2021-07-05 2024-04-30 Tracto-Technik Gmbh & Co. Kg Drill bit of a ground drilling device with an enlargement of a receptacle for fastening an attachment thereto and method for producing same

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DE102019005132B4 (de) 2023-10-19
US20210025234A1 (en) 2021-01-28
US11346155B2 (en) 2022-05-31
DE102019005132A1 (de) 2021-01-28

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