EP2556205B1 - Zweiteiliges bohrwerkzeug zum schlag- oder drehschlagbohren von löchern in boden- oder gesteinsmaterial - Google Patents

Zweiteiliges bohrwerkzeug zum schlag- oder drehschlagbohren von löchern in boden- oder gesteinsmaterial Download PDF

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Publication number
EP2556205B1
EP2556205B1 EP20110718232 EP11718232A EP2556205B1 EP 2556205 B1 EP2556205 B1 EP 2556205B1 EP 20110718232 EP20110718232 EP 20110718232 EP 11718232 A EP11718232 A EP 11718232A EP 2556205 B1 EP2556205 B1 EP 2556205B1
Authority
EP
European Patent Office
Prior art keywords
adapter
drilling tool
drill head
thread
tool according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP20110718232
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2556205A2 (de
Inventor
Walter Karpellus
Karl BÖHM
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.)
Dywidag Systems International GmbH Austria
Original Assignee
Dywidag Systems International GmbH Austria
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 Dywidag Systems International GmbH Austria filed Critical Dywidag Systems International GmbH Austria
Priority to PL11718232T priority Critical patent/PL2556205T3/pl
Publication of EP2556205A2 publication Critical patent/EP2556205A2/de
Application granted granted Critical
Publication of EP2556205B1 publication Critical patent/EP2556205B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/06—Down-hole impacting means, e.g. hammers
    • 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
    • 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
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/042—Threaded
    • 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
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/042—Threaded
    • E21B17/0426—Threaded with a threaded cylindrical portion, e.g. for percussion rods

Definitions

  • the present invention relates to a two-part drilling tool for impact or rotary impact drilling of holes in soil or rock material with a drill head and an adapter member fixed in an interior of the drill head via cooperating complementary threads for coupling to a drill string, one facing away from a bore hole interior Front side of the drill head rests on a complementary trained stop or support surface of the adapter part.
  • Drilling tools for impact or rotary impact drilling holes in soil or rock material are known in a variety of designs and for a variety of purposes, in more recent times often drill bits are used, of which a part, the so-called ring bit remains after completion of a borehole in this or so-called lost drill bits are used, which remain after completion of a wellbore entirely in the wellbore.
  • drill bits for reasons of economy usually a retatively soft material for either the entire or at least the ring bit used, so that after completion of a well often problems when loosening and retracting the drill string or an adapter connected to the drill string, due to material deformations in the Area of the connection of the drill head or the drill bit and the adapter or the mountain-side end of the drill string occur.
  • a two-piece threaded drill has been known in which attempts have been made to keep the threaded connection of a drill with a drill string of bending moments free, and thus to prevent destruction of the thread, by providing larger diameter stop members than that of the threaded joint.
  • a two-part drill head has become known in which a drill head cooperates with an adapter inserted via a thread in the drill head, the two parts having mutually different threads which are adapted to securely receive lead grains during drilling.
  • the invention now aims to provide a threaded connection between a lost drill bit or a drill head and an adapter, which has both a sufficient service life for the formation of a wellbore and can be solved safely after completion of the drilling process to reusable elements, how to safely and reliably recover the boring bar and / or an adapter with a boring bar fixed thereto.
  • the two-part drilling tool according to the invention is characterized in that the remote from the bore hole end face of the drill head and the cooperating stop or support surface of the adapter plate is designed as a complementarily shaped wedge surfaces with front teeth, wherein essentially the wedge surfaces the impact stress and the end surfaces receive the torques, and that the pitch angle of the wedge surfaces is smaller than the pitch angle of the internal thread of the drill head or the cooperating external thread of the adapter part.
  • the remote from the bore hole end face of the drill head and the cooperating stop or support surface of the adapter part are designed as complementary trained wedge surfaces with front teeth, a rotation of the complementary inner and outer threads is provided which ensures that excessive torque stresses on the Thread be withheld.
  • the pitch angle of the wedge surfaces is smaller than the pitch angle of the internal thread of the drill head or the cooperating external thread of the adapter part, a relief of the thread is ensured in the axial direction, since the impact stress is applied primarily to the wedge surfaces and for excessive Wear particularly endangered surfaces of the cooperating thread, namely the interior of the mountain facing surface of the thread on the adapter and facing the mountain exterior surface of the drill bit or the Drill, are kept substantially free of impact in the axial direction.
  • the adapter can be reliably and reliably released from the drill bit, so that an excessive material cost and in particular the loss of adapters can be avoided.
  • the two-part drilling tool is designed so that the pitch angle of the wedge surfaces is at least 10% and at most 50%, in particular about 25% smaller than the pitch angle of the inner and outer threads. Due to a significantly smaller pitch angle of the bed area with respect to those of the internal thread of the drill head and the external thread of the adapter is lifted when screwing the adapter into the drill forcibly, so that forcibly a certain play of the thread of the adapter is formed in the internal thread of the drill head whereby during a drilling operation, the threaded connection between the drill head and adapter is kept substantially free of axial forces.
  • the invention is preferably developed such that in the axial direction of the two-part drill extending threads of the complementary thread of the drill head and the adapter have a dimension in the axial direction of the two-piece drill, which those exceeds the thread heads.
  • each of the thread root has a greater longitudinal extent in the axial direction of the two-piece drilling tool than the engaging respectively in the thread root threaded head, the respective threaded head is held completely free of axial stress at each stress of the two-piece drilling tool and it can thus be prevented that the complementary Thread and in particular: the usually made of a softer material internal thread of the drill head is knocked out or rounded during the drilling process by excessive load and after completion of the drilling process can not be solved.
  • the thread root exceeds the dimension of the threaded head in the axial direction of the two-piece drilling tool by at least one third of the height of the front teeth, not only an exemption of the complementary thread of any axial load is ensured but additionally ensured that the clearance between the threaded head and thread base is sufficiently small so as not to be subject to undesirable bending moments during drilling and in addition to dirty by registered rock remains too far that a loosening roof termination of the drilling process is impossible.
  • the invention is preferably designed so that the end face of the adapter and the stop or support surface of the drill head at least one, in particular at least three wedge surfaces with front teeth.
  • the slope of the wedge surfaces is here chosen so that the resulting longitudinal extent of the spur teeth in the axial direction is so large that even with the highest rotating loads or highest bending moments a sufficiently large bearing surface is provided on the drill head and on the adapter front teeth available to a safe and reliable To ensure transmission of the required torques and eichzeitig to prevent excessive wear of the front teeth.
  • At least the wedge surfaces of the adapter are hardened ensures that the particularly stressed, the impact energy transmitted, wedge surfaces are secured against knocking or wearing.
  • the wedge surfaces of the adapter are hardened, a recycling of this element or of these elements is ensured after a drilling operation has been impaired in further drilling operations.
  • this one preferred Further development of the invention corresponds to the wedge surfaces and the front teeth of the adapter are hardened, all highly stressed elements of the adapter are secured against premature wear.
  • the front teeth are hardened, not only the transmission of very high torques is ensured but especially a knocking off the extremely loaded areas of the front teeth avoided.
  • the training according to the invention is preferably developed so that in the adapter and in the Anschlagg. Support surface of the drill head in the region of the front teeth are each formed in approximately semicircular recesses.
  • the two-part drilling tool according to the invention is preferably developed such that the internal thread of the drill head and the cooperating complementary external thread of the adapter are formed as a single thread.
  • catchy threads it is also possible in the case of extreme contamination and for example the entry of tough or solidifying drilling mud to safely release the thread after completion of the drilling process and thus the elements intended for further use, namely the drill pipe and optionally an adapter to specification safely and reliably remove the drill string from the lost drill bit.
  • the two-part drilling tool according to the invention is designed so that the respective thread of the drill head and the adapter over at least 75% and at most 99% of the circumference of the adapter and the drill head extends on the one hand a secure connection of the drill head with the adapter ensures and on the other hand ensured that the connection can be solved reliably even after extreme loads and / or contamination.
  • the complementary threads are designed as flat threads or trapezoidal threads with a flank angle of less than 25 °.
  • flat thread or trapezoidal thread to accommodate high axial stresses capable and on the other hand manages with such thread forms the necessary clearance or the necessary space between a thread root and a corresponding meshing threaded head to provide the intended preferred features of To achieve invention.
  • Fig. 1 is a drill head 1, in particular a so-called lost drill bit 1 shown, which is formed on its side facing away from the release tools 2 end face 3 with wedge surfaces 4 and front teeth 5.
  • the wedge surfaces 4 are hiebei designed so that they are formed with complementary wedge surfaces 6 of an adapter 7 while drilling holes in soil and / or rock material adjacent to each other and via which wedge surfaces 4 and 6, the impact energy is applied via the adapter 7 to the drill head 1.
  • the adapter 7 has hiebei in addition to the wedge surfaces 6 Stirzähne 8, which abut during a drilling, in particular during the application of torque during a rotary impact drilling on the complementary front teeth 5 of the drill head 1 and absorb the torques applied to the two-piece drilling tool or withstand these ,
  • Fig. 2 which is a section along the line AA of Fig. 1 represents the reference numerals of Fig. 1 maintained.
  • an inlet thread 11 is formed, which is designed so that a thread base 12 in the axial direction of the two-piece drilling tool has greater longitudinal extent than cooperating with this thread base 12 threaded head 13 of the thread 11 engaging in the thread 14 of Adapters 7
  • the complementary thread 14 of the adapter 7 is hiebei also formed so that a thread root 20 has a greater axial length than a thread engaging in this root 20 threaded head.
  • the cooperating threads 11 and 14 essentially serve to center the adapter 7 in the drill head 1 and take in the case of loading of the drill head 1, in particular during impact or rotary impact drilling on any axial load and are thus free of any in axial direction acting loads.
  • the training hiebei is such that while drilling a threaded head 13 of the formed on the adapter 7 thread 14 is arranged substantially centrally in a thread base 12 of the complementary thread 11 in the drill head 1 and that both sides of the threaded head 13 in Essentially equal free spaces 15 is formed both in the direction of the excavation front and the drill pins 2 of the drill head 1 and in the direction away from the bore hole inside, so that during drilling, in particular impact and / or rotary impact drilling no load on the threaded head or the threaded heads 13 acts.
  • the cooperating wedge surfaces 4 and 6 of the drill head 1 and the adapter 7 are hiebei formed so that they can be performed without mutual interference on each other and also that formed in both elements 1 and 7 front teeth 5 and 8 are moved freely one above the other can, without abutting one another or abut against each other, whereby a secure, reliable screwing the adapter 7 is ensured in the drill head 1.
  • Fig. 5 the two-part drilling tool is shown during retraction of the adapter 7 in the direction of arrow 17, as is usually performed during a rotary impact drilling.
  • the shoulder 18 of the threaded head 13, which is remote from the bore hole, of the thread 14 formed on the adapter 7 now comes into contact with the side 19 of the thread 11 formed in the drill head 1, and more precisely against the shoulder remote from the drill hole interior 19 of the thread bottom 12 of the thread 11 in Appendix.
  • the drill bit 1 are now the wedge surfaces 4 and 6 of the adapter 7 and the drill head 1 lifted from each other or are not directly adjacent to each other and an axial load acts on the wedge surfaces 4 and 6 not.
  • a section through an adapter 7 is shown, in which (which) the pitch angle ⁇ 1 or ⁇ 2 of the wedge surface 6 and the thread 14 are shown.
  • the angle a1 or ⁇ 2 which in relation to a fictitious, normal to a longitudinal axis 21 of the;
  • Adapters standing axis 22 are determined as the pitch angle of the respective thread, clearly show that when screwing the adapter 7 in the in Fig. 7 drill head 1 not shown, the thread 14 must forcibly lift off from the complementary thread 11 of the drill head 1 whereby the complementary threads 11, 14 are held during the drilling operation in the axial direction free of forces.
  • the wedge surfaces 6 and the end teeth 8 are formed hardened for achieving a particularly high stability.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
EP20110718232 2010-04-07 2011-04-06 Zweiteiliges bohrwerkzeug zum schlag- oder drehschlagbohren von löchern in boden- oder gesteinsmaterial Active EP2556205B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11718232T PL2556205T3 (pl) 2010-04-07 2011-04-06 Dwuczęściowe narzędzie wiertnicze do udarowego lub obrotowo-udarowego wiercenia otworów w materiale gruntowym lub skalnym

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA559/2010A AT509643B1 (de) 2010-04-07 2010-04-07 Zweiteiliges bohrwerkzeug zum schlag- oder drehschlagbohren von löchern in boden- oder gesteinsmaterial
PCT/AT2011/000164 WO2011123875A2 (de) 2010-04-07 2011-04-06 Zweiteiliges bohrwerkzeug zum schlag- oder drehschlagbohren von löchern in boden- oder gesteinsmaterial

Publications (2)

Publication Number Publication Date
EP2556205A2 EP2556205A2 (de) 2013-02-13
EP2556205B1 true EP2556205B1 (de) 2015-01-07

Family

ID=44581821

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20110718232 Active EP2556205B1 (de) 2010-04-07 2011-04-06 Zweiteiliges bohrwerkzeug zum schlag- oder drehschlagbohren von löchern in boden- oder gesteinsmaterial

Country Status (7)

Country Link
US (1) US20130098689A1 (pl)
EP (1) EP2556205B1 (pl)
AT (1) AT509643B1 (pl)
AU (1) AU2011238405A1 (pl)
CA (1) CA2795560A1 (pl)
PL (1) PL2556205T3 (pl)
WO (1) WO2011123875A2 (pl)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2015259870B2 (en) * 2014-05-16 2019-05-02 Epiroc Drilling Tools Aktiebolag Joint and joint parts for drill string components
BR112016023275B1 (pt) * 2015-05-15 2022-07-19 Márcio Dos Santos Dispositivo para tratamento de túneis através de enfilagens tubulares auto-revestidas e auto-injetáveis
EP3320169A4 (en) * 2015-07-09 2019-03-27 Fero Group Pty Ltd TRAPPET ASSEMBLY IN TWO PARTS
CN108678678B (zh) * 2018-06-06 2024-04-02 中国矿业大学 一种矿用双层干式吸尘钻头
EP4041980A1 (en) * 2019-10-11 2022-08-17 Sandvik Mining and Construction Tools AB Shoulder protected drilling assembly

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2052011A (en) 1934-08-06 1936-08-25 Timken Roller Bearing Co Separable drill bit
US2673715A (en) * 1950-06-02 1954-03-30 Timken Roller Bearing Co Rock drill bit
US3114566A (en) * 1961-04-21 1963-12-17 Kobe Inc Shrink fit tubing joint
DE2543578C2 (de) 1975-09-30 1986-03-06 Friedrich Duss Maschinenfabrik GmbH & Co, 7265 Neubulach Gesteinsbohrer
AU503750B2 (en) * 1976-07-13 1979-09-20 William Lister Rock drilling bit
DE3330025A1 (de) * 1982-08-30 1984-03-01 Ingersoll-Rand Co., 07675 Woodcliff Lake, N.J. Zweistueckiger bohrer
SE458943B (sv) * 1984-10-10 1989-05-22 Jan Persson Koppling mellan en borrkrona och borraxel
DE19541163A1 (de) 1995-11-04 1997-05-07 Hawera Probst Kg Hartmetall Bohrwerkzeug, insbesondere zur Bearbeitung von Gestein
SE520893C2 (sv) * 2002-02-21 2003-09-09 Sandvik Ab Element för slående bergborrning, innefattande åtminstone en gänga
US7591059B2 (en) * 2005-09-13 2009-09-22 Weatherford/Lamb, Inc. Expansion activated anti-rotation device
US7419018B2 (en) * 2006-11-01 2008-09-02 Hall David R Cam assembly in a downhole component
AT505072B1 (de) * 2007-04-13 2009-02-15 Alwag Tunnelausbau Gmbh Verfahren und vorrichtung zum sichern eines mit einem aussengewinde versehenen gegenstands
AT505158B1 (de) * 2007-04-19 2008-11-15 Techmo Entw & Vertriebs Gmbh Vorrichtung zum lösbaren verbinden einer bohrkrone mit einem bohrgestänge
SE0701371L (sv) * 2007-06-05 2008-03-11 Sandvik Intellectual Property Bergborrutrustning samt hon- och handelar därtill

Also Published As

Publication number Publication date
AU2011238405A1 (en) 2012-11-01
US20130098689A1 (en) 2013-04-25
WO2011123875A2 (de) 2011-10-13
WO2011123875A3 (de) 2012-03-08
AU2011238405A2 (en) 2012-11-29
PL2556205T3 (pl) 2015-07-31
EP2556205A2 (de) 2013-02-13
AT509643B1 (de) 2013-08-15
CA2795560A1 (en) 2011-10-13
AT509643A1 (de) 2011-10-15

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