EP2558672A2 - Dispositif de forage du sol - Google Patents

Dispositif de forage du sol

Info

Publication number
EP2558672A2
EP2558672A2 EP11717182A EP11717182A EP2558672A2 EP 2558672 A2 EP2558672 A2 EP 2558672A2 EP 11717182 A EP11717182 A EP 11717182A EP 11717182 A EP11717182 A EP 11717182A EP 2558672 A2 EP2558672 A2 EP 2558672A2
Authority
EP
European Patent Office
Prior art keywords
erdbohrvorrichtung
sealing
drill head
sealing element
free space
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
EP11717182A
Other languages
German (de)
English (en)
Other versions
EP2558672B1 (fr
Inventor
Franz-Josef Püttmann
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
Priority to PL11717182T priority Critical patent/PL2558672T3/pl
Publication of EP2558672A2 publication Critical patent/EP2558672A2/fr
Application granted granted Critical
Publication of EP2558672B1 publication Critical patent/EP2558672B1/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
    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/03—Couplings; joints between drilling rod or pipe and drill motor or surface drive, e.g. between drilling rod and hammer

Definitions

  • the invention relates to a Erdbohrvorraum with a base body and a movable thereto in the longitudinal axial direction drill head.
  • An earth boring device with a relative to a base movably mounted drill head is known for example from DE 195 08 542 A1.
  • This is a self-propelled Erdbohrvorraum, a so-called Erdrakete.
  • This Erdrakete has a base body within which a percussion piston is mounted movably in the longitudinal axial direction.
  • the percussion piston is forced into a cyclic reciprocating motion by the supply of compressed air, with the percussion piston impinging on a front impact surface at each cycle, ultimately transferring the kinetic energy of the percussion piston to the body of the launcher in the soil.
  • the front striking surface is formed by a firing pin, which is part of a drill head of the Erdrakete.
  • the drill head is movably mounted in the longitudinal body in the main body; to guide the relative movement between the drill head and the main body of the firing pin is mounted within a corresponding opening of the body.
  • the firing pin has at its extending in the base body section still has an annular shoulder whose diameter is greater than the diameter of the opening in the body.
  • CONFIRMATION COPY the percussion piston strikes the impact surface of the firing pin; after a defined relative movement of the drill head to the main body of the annular shoulder of the firing pin then strikes a striking surface of the body, whereby the remaining energy is transferred to the body to track these the drill head in the bore.
  • the annular shoulder of the firing pin forms with the corresponding portion of the base body a free space whose size varies depending on the position of the drill head relative to the base body. This space is connected via the annular gap between the annular shoulder and the inner wall of the body with the working chamber of the body, within which the percussion piston is moved cyclically.
  • this annular gap is small, but not sealed for cost reasons, so that it may come to a (partial) pressure equalization between the working chamber and the free space, whereby compressed air, which has been passed in a drive phase of the percussion piston in the working chamber, flows into the free space , Since the pressure balance between the free space and the working chamber is relatively slow, it may come to the venting of the working chamber that in the free space, an overpressure prevails that hinders a return movement of the drill head in its retracted position. To prevent this, it is provided to additionally connect the free space with the surroundings, so that an overpressure forming in the free space can be discharged not only to the working chamber but also to the surroundings. In the case of the Erdrakete DE 195 08 542 A1 this is done on the turn unsealed storage of the firing pin in the opening of the body.
  • the present invention seeks to provide an improved Erdbohrvortechnische with a movable drill head.
  • the penetration of undesirable contamination in the space formed between the movable drill head and the body of the Erdbohrvortechnisch space to be prevented.
  • This object is solved by the subject matter of independent claim 1.
  • Advantageous developments of the Erdbohrvoroplasty invention are the subject of the dependent claims and will become apparent from the following description of the invention.
  • a sealing element which is inventively designed so that it acts as a valve element, the one within the free space prevailing overpressure and seals at a pressure prevailing within the free space vacuum to prevent ingress of dirt into the free space as possible.
  • An earth boring device therefore has a base body and a drill head movably mounted for this purpose in the longitudinal axial direction (i.e., the drilling direction), wherein a free space which is variable in size by the movable bearing is formed between the drill head and the base body; Furthermore, a sealing element is provided for sealing the free space relative to the environment, wherein the sealing element is designed as a valve element which opens at a pressure prevailing within the space pressure to produce a pressure equalization and which is closed at a prevailing within the free space negative pressure to a pressure compensation to prevent.
  • An earth boring device can be any device with which bores and in particular horizontal bores can be introduced into the ground.
  • these are particularly preferably self-propelled earth boring devices, so-called ground rockets, which are equipped with an internal impact mechanism (percussion piston) which is driven by the supply of a pressure fluid and in particular a compressed gas (compressed air).
  • percussion piston internal impact mechanism
  • the sealing element has a sealing lip designed as an oblique extension.
  • a sealing lip designed as an oblique extension.
  • the sealing element is formed or integrated into the Erdbohrvorraum that a defined Naturalläse between the free space and the environment is formed, the passage is released depending on the pressure conditions or closed by the sealing lip.
  • a defined passage between see the clearance and the environment allows pressure equalization, as far as this is necessary for the function of the movable drill head.
  • the sealing element has a recess into which the sealing lip can dip in order to release the passage between the free space and the environment in the event of overpressure. This can in turn ensure the most unhindered pressure equalization between the free space and the environment in the event of overpressure in the free space.
  • the sealing element according to the invention can be integrated in a simple manner in this, if this is designed as a sealing ring.
  • the sealing element may comprise exclusively or additionally at least one adapted vent hole, which connects the free space with the environment.
  • This vent hole can be carried out so small (ie adapted) that this is done at a prevailing in the space pressure over a pressure gas flow from the space into the environment, but at the same time a suction of dirt at a prevailing in the free space vacuum (this is regularly only for a short time and with a lower (compared to the overpressure) differential pressure before) largely prevented.
  • An intake of contaminants through the vent hole can also be prevented by an adapted integration of the vent opening in the sealing element, for example by the sucked flow is deflected several times before it enters the free space. These deflections can prevent contaminants, in particular in the form of relatively heavy particles or droplets, from actually penetrating into the free space.
  • the at least one vent opening with another sealing part (in particular a sealing lip) of the sealing element which acts as a valve element.
  • the vent opening can then be arranged so that the pressure gas flow emerging from the vent at a clearance prevailing in the free space flows into the area in front of, for example, the sealing lip, whereby the sealing lip, which can take over the actual function of pressure equalization, is freed from contamination. is held. As a result, a permanent function of the sealing lip can be ensured.
  • the earth boring device according to the invention is preferably designed as a self-propelled earth rocket and thus has an oscillating inside the housing percussion piston which can cyclically impinge on a front impact surface of the Erdrakete to propel the Erdbohrvorraum in the drilling direction.
  • Such an inventive ground rocket may preferably further comprise a threaded ring with an external thread which is screwed into a corresponding internal thread of the housing and which serves to transmit the energy transmitted by the percussion piston to the housing.
  • This threaded ring may preferably also serve as a bearing for the movable drill head, for which purpose the earth drilling device may further comprise a firing pin which is connected to the drill head and extends through the threaded ring.
  • the striker may project beyond the threaded ring such that the striker piston first impacts the striker and thereby moves the bit relative to the housing.
  • connection of the threaded ring with the housing in the form of a threaded connection can ensure a simple and quick replaceability.
  • a disadvantage of a threaded connection in a Erdbohr réelle may, however, that it is sensitive to contamination, since a soiled threaded connection often can not solve or only with the aid of tools again.
  • the sealing ring is formed or integrated into the Erdbohrvoriques that this seals at the same time the threaded connection between the threaded ring and the housing from the environment.
  • the sealing element may also be provided to connect the threaded ring with the sealing element according to the invention (solid), so that both elements can be used as a unit in the Erdbohrvortechnische or removed from this again.
  • the sealing element if it is designed as a sealing ring, is attached to a cylindrical projection of the threaded ring.
  • the sealing element of the Erdbohrvorsch invention may of course be formed in several parts.
  • FIG. 1 shows a section of a Erdbohrvoroplasty invention in a sectional side view.
  • FIG. 2 shows a perspective view of individual elements of the earth boring device of FIG. 1.
  • the front portion of a Erdbohrvoroplasty invention is shown in a sectional side view.
  • the Erdbohrvoretti consists essentially of a base body 1 and a relative to the base body 1 movably mounted drill head 2.
  • the main body 1 comprises a housing 3, in the rear portion of a percussion piston 4 is movably mounted.
  • the percussion piston 4 is placed in known manner by means of compressed air, which is supplied to the Erdbohrvorides at its rear end (not shown) via a compressed air line, in an oscillating motion, wherein they are in the drilling operation of the Erdbohrvorides in each cycle of their movement on a front striking surface impinges to transmit the kinetic energy of the percussion piston 4 in two stages, first on the drill head 2 and then on the housing 1 of the Erdbohrvortechnisch to propel the Erdbohrvortechnisch in the ground.
  • the illustrated Erdbohrvoretti is therefore an earth rocket.
  • the percussion piston 4 hits in its forward movement, first on the rear end of a firing pin 5, which is a part of the drill head 2 and extends into the working chamber 6 of the main body 1, in which the percussion piston 4 is movably mounted.
  • the front end of the firing pin 5 forms a drill head tip 7, which ensures due to their relatively small diameter for a high directional stability of the Erdrakete in the movement through the soil.
  • Behind the drill head tip 7, two annular drill head elements 8, 9 are connected in succession to the firing pin 5.
  • the connection is made by means of two fastening bolts 10th
  • the front drill head element 8 forms a plurality of radially aligned cutting elements 11, the radial extent of which corresponds substantially to the radius of the housing 3 and consequently to the radius of the bore to be created. Between two adjacent cutting elements in each case a channel is formed, the channel base 12 - seen from front to rear - is formed rising.
  • the cutting elements 11 cut into the ground and solve this, which is then discharged through the formed between the cutting elements 11 channels to the rear. Due to the increasing geometry of the channel bottoms 12, the soil is already displaced radially outward and compacted. This compression is continued by the rear drill head element 9, whose lateral surface is conically formed in its front portion and whose diameter widens to a diameter (viewed from front to back), which corresponds to that of the housing 3 of the Erdrakete.
  • the storage of the firing pin 5 in the base body 1 is taken over, inter alia, by a threaded ring 13, which is screwed into the front end of the housing 3.
  • the threaded ring 13 has an external thread and the housing has a corresponding internal thread.
  • a threaded bushing 14 connects, which also has an external thread which engages in a corresponding internal thread of the housing 3.
  • an annular space is formed in which a cylindrical 15 is arranged.
  • This coil spring 15 is supported on the front side in each case on a projection of the threaded bushing 14 and on the rear side on a projection of the firing pin 5.
  • the threaded ring 13 is slotted on one side in the longitudinal axial direction, wherein the slot at the end of the threaded bush 14 facing end is conically formed in a portion.
  • a spreader 18 is used, which has a threaded bolt 19 which can be screwed to a threaded sleeve 20.
  • a conical head portion 21 of the expansion element is drawn into the corresponding conical portion of the slot, whereby the threaded ring 13 is spread.
  • the surface pressure of the threaded connection between the threaded ring 13 and the housing 3 is increased, thereby achieving a secure fit of the threaded ring 13 and thus also the threaded bushing 14 in the housing 3.
  • the sealing ring 23 is made of an elastic material (eg elastomer) and forms on its inner surface a projection 24 which can engage in a corresponding recess 25 of the cylindrical projection 22 of the threaded ring 13. This allows a secure connection of the threaded ring 13 can be achieved with the sealing ring 23, so that the two components handled as a unit and in particular built into the Erdrakete or can be removed from this.
  • the sealing ring 23 further forms a through hole 26, which serves to receive the threaded sleeve 20.
  • the movable mounting of the firing pin 5 in the base body 1 results in a connection between the working chamber 6, in which the percussion piston 4 is movably guided, and the free space 27, between the rear Bohrkopfelement 9 and the firing pin 5 (as parts of the drill head ) and the sealing ring 23, the threaded ring 13 and the spacer ring 17 (as parts of the base body 1) is formed.
  • no seal is provided, which would reliably prevent the temporary in the working chamber 6 prevailing high pressure leads to an overflow of the compressed air therein into the space 27.
  • this annular gap 28 has the disadvantage that relatively easy soiling (in particular soil and water) can penetrate from the environment into the free space 27, whereby at least the wear of the moving parts increases and the mobility of these parts would be hindered.
  • relatively easy soiling in particular soil and water
  • the risk of contamination penetration is in particular because of the forward movement of the drill head, the free space is temporarily increased quickly, whereby (temporarily) a negative pressure (relative to the environment) is generated. By this negative pressure soiling can be sucked through the annular gap.
  • the sealing ring 23 is provided with a sealing lip 29, which is formed obliquely pointing backwards. Due to the special design of the sealing lip 29, this can be deformed at a pressure prevailing in the free space 27 overpressure, whereby they can dive into a located next to the sealing lip 29, annular recess 30 of the sealing ring 23. As a result, the annular gap 28 is released. On the other hand, if a negative pressure relative to the environment prevails in the free space 27, this negative pressure causes the sealing lip 29 to be pressed against the inner surface formed by the rear drill head element 9, thereby closing the annular gap 28.
  • the sealing ring 23 further comprises two small oppositely arranged vent openings 32 which, in conjunction with two flats 33 in a front shoulder of the cylindrical projection 22, establish a connection between the free space 27 and the environment.
  • vent openings 32 Through these vent openings 32, a compressed gas flow can take place from the free space into the environment in the event of an overpressure prevailing in the free space.
  • an intake of dirt in a prevailing in the space 27 vacuum is largely prevented because the vents 32 on the one hand have only a relatively small diameter and on the other so arranged in the sealing ring 23 or integrated into the Erdbohrvorraum that an air flow is deflected several times from the environment into the free space 27 (see Fig. 1) before it enters the free space 27.
  • vent openings 32 open in the mounted state of the sealing ring 23 in the formed between the sealing ring 23 and the rear Bohrkopfelement 9 gap and thus - seen from the environment - in front of the sealing lip 29.
  • the temporarily emerging from the vent holes 32 compressed air can prevent Contaminations accumulate on the side of the sealing lip 29 facing the gap, which may affect the function of the sealing lip 29 after prolonged use of the earth boring device.
  • the sealing ring 23 additionally has an annular sealing bead 31, which bears partially against the front end of the housing 3. This sealing bead 31 prevents contaminants from penetrating into the threaded connection between the threaded ring 13 and the housing 3. This can ensure that the threaded connection can be solved after a long use of Erdrakete without much effort.

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)

Abstract

L'invention concerne un dispositif de forage du sol présentant un corps de base et une tête de forage montée de manière mobile par rapport à celui-ci en direction de l'axe longitudinal, un espace libre, dont la taille change en raison du montage mobile, étant réalisé entre la tête de forage et le corps de base. Le dispositif de forage au sol présente également un élément d'étanchéité destiné à assurer l'étanchéité de l'espace libre par rapport à l'environnement, l'élément d'étanchéité étant réalisé sous la forme d'un élément soupape qui s'ouvre lorsqu'une surpression règne à l'intérieur de l'espace libre, afin d'établir un équilibrage de pression, et qui se ferme lorsqu'une dépression règne à l'intérieur de l'espace libre, afin d'empêcher un équilibrage de pression.
EP11717182.7A 2010-04-16 2011-04-08 Dispositif de forage du sol Active EP2558672B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11717182T PL2558672T3 (pl) 2010-04-16 2011-04-08 Urządzenie wiertnicze ziemne

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010015465A DE102010015465A1 (de) 2010-04-16 2010-04-16 Erdbohrvorrichtung
PCT/EP2011/001764 WO2011128045A2 (fr) 2010-04-16 2011-04-08 Dispositif de forage du sol

Publications (2)

Publication Number Publication Date
EP2558672A2 true EP2558672A2 (fr) 2013-02-20
EP2558672B1 EP2558672B1 (fr) 2014-12-24

Family

ID=44626096

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11717182.7A Active EP2558672B1 (fr) 2010-04-16 2011-04-08 Dispositif de forage du sol

Country Status (5)

Country Link
US (1) US9328560B2 (fr)
EP (1) EP2558672B1 (fr)
DE (1) DE102010015465A1 (fr)
PL (1) PL2558672T3 (fr)
WO (1) WO2011128045A2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014016154A1 (de) * 2014-11-04 2016-05-04 Tracto-Technik Gmbh & Co. Kg Rammbohrvorrichtung
DE102015008339A1 (de) * 2015-07-01 2017-01-05 Tracto-Technik Gmbh & Co. Kg "Rammbohrvorrichtung und Verfahren zum Umsteuern einer Rammbohrvorrichtung"
DE102017005767B4 (de) 2017-06-20 2019-04-25 Tracto-Technik Gmbh & Co. Kg Erdbohrvorrichtung, Verfahren zu dessen Herstellung und Verwenden eines Fügeprozesses
DE102018209564B4 (de) * 2018-06-14 2021-05-20 Krinner Innovation Gmbh Eindrehvorrichtung mit schlagwirkung
DE102019005132B4 (de) * 2019-07-24 2023-10-19 Tracto-Technik Gmbh & Co. Kg Selbstgetriebener Bohrkopf
DE102021003448A1 (de) 2021-07-05 2023-01-05 Tracto-Technik Gmbh & Co. Kg Bohrkopf elner Erdbohrvorrichtung, Verfahren zum Herstellen eines Bohrkopfs einer Erdbohrvorrichtung und Verwendung eines Bohrkopfs einer Erdbohrvorrichtung

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
US4662457A (en) * 1984-10-19 1987-05-05 Allied Steel & Tractor Products, Inc. Reversible underground piercing device
DE3911467A1 (de) 1989-04-08 1990-10-11 Tracto Technik Selbstantreibbares rammbohrgeraet, insbesondere fuer die herstellung von rohrfoermigen erdbohrungen
DE19508542A1 (de) 1995-03-10 1996-09-12 Tracto Technik Schlaggerät
US5794718A (en) * 1996-03-11 1998-08-18 Lockheed Idaho Technologies Company Maneuvering impact boring head
US6283229B1 (en) * 1998-02-17 2001-09-04 Earth Tool Company, L.L.C. Impact device for directional boring
DE10112985B4 (de) * 2001-03-17 2006-03-02 Tracto-Technik Gmbh Schlagbohrkopf und ein Verfahren zum Horizontalbohren mit einem Schlaggerät
US7954565B2 (en) * 2005-11-11 2011-06-07 Tracto-Technik Gmbh Thread retention for an earth boring device
EA017936B1 (ru) * 2006-10-20 2013-04-30 Дриллрок Пнеуматик Пти Лтд. Скважинный бурильный молоток
CA2665298C (fr) 2008-05-03 2016-03-01 Earth Tool Company, Llc Outil a percussion pneumatique

Non-Patent Citations (1)

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Title
See references of WO2011128045A2 *

Also Published As

Publication number Publication date
DE102010015465A1 (de) 2011-10-20
US20130025936A1 (en) 2013-01-31
PL2558672T3 (pl) 2015-06-30
EP2558672B1 (fr) 2014-12-24
WO2011128045A3 (fr) 2012-06-07
US9328560B2 (en) 2016-05-03
WO2011128045A2 (fr) 2011-10-20

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