DE115257C - - Google Patents

Info

Publication number
DE115257C
DE115257C DENDAT115257D DE115257DA DE115257C DE 115257 C DE115257 C DE 115257C DE NDAT115257 D DENDAT115257 D DE NDAT115257D DE 115257D A DE115257D A DE 115257DA DE 115257 C DE115257 C DE 115257C
Authority
DE
Germany
Prior art keywords
drilling
drill bit
chisels
widening
borehole
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
DENDAT115257D
Other languages
German (de)
Publication of DE115257C publication Critical patent/DE115257C/de
Active legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/26Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • E21B10/265Bi-center drill bits, i.e. an integral bit and eccentric reamer used to simultaneously drill and underream the hole
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/64Drill bits characterised by the whole or part thereof being insertable into or removable from the borehole without withdrawing the drilling pipe
    • E21B10/66Drill bits characterised by the whole or part thereof being insertable into or removable from the borehole without withdrawing the drilling pipe the cutting element movable through the drilling pipe and laterally shiftable

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)

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

Um beim Tiefbohren in abwechselnd lockeren und harten, steilabfallenden Gebirgen die Futterrohre dem Bohrfortschritt entsprechend nachschieben zu können, .verwendet man excentrische Bohrmeißel. Dabei hat es sich herausgestellt, daß das Bohren in den verschiedenen Gesteinarten wesentlich erleichtert wird, wenn der Bohrmeißel zum Nachbohren eingerichtet, etwa in bekannter Weise mit einer Nachbohrschneide versehen wird.Around the casing pipes when drilling deep in alternating loose and hard, steeply sloping mountains to be able to push the drilling progress according to. one uses eccentric Drill bit. It has been found that drilling in the various Rock types is made much easier if the drill bit is set up for re-drilling, is provided for example in a known manner with a reaming cutter.

Diesen Zweck verfolgt der Bohrmeißel des vorliegenden Patentes; er erzielt aber dabei in auszeichnender Weise insofern eine Erhöhung der Bohrleistung, als nicht nur eine, sondern mehrere Nachbohrschneiden bezw. Einzelmeißel ganz unabhängig und getrennt vom Vorbohrmeißel Verwendung finden.This is the purpose of the drill bit of the present patent; but he achieves in An excellent way to increase the drilling performance, as not just one, but several re-drilling respectively. Individual bits completely independent and separate from the pilot drill bit Find use.

Nach der Zeichnung, welche zur Erläuterung der Erfindung dient, sind in ein excentrisches Kopfstück α flach ausgebildete Einzelmeißel b von bequem zu bearbeitender Form und Größe in verschiedenen Abständen von dem mittleren führenden Vorbohrmeißel c um diesen letzteren in der Weise auswechselbar angeordnet, daß eine Erweiterung des Bohrloches unter den nachzuschiebenden Futterrohren s ermöglicht wird.According to the drawing, which serves to explain the invention, flat individual chisels b of easy-to-work shape and size are arranged in an eccentric head piece α at different distances from the central leading pilot bit c to the latter in such a way that an extension of the Boreholes under the casing to be pushed s is made possible.

Sobald die Rohre s um die Höhe des Kopfstückes α angehoben sind, stellt sich die Schwerstange g in die Mitte des Bohrloches und der Meißel c bohrt centrisch ein Loch vor. Dadurch wird der eine der Meißel b so geführt, daß er unter· den Rohren s das Loch erweitert, während die anderen Meißel b die übrige Fläche des Gesteins zerstoßen. Die Bohrleistung des Bohrmeißels wird um so größer, je mehr Einzelmeißel b angeordnet werden; auch wird sich der Meißel weniger verlaufen, indem die Aufpchlagfläche desselben bedeutend größer wird. Die Meißel cb können sowohl mit Kanälen zur Wasserspülung, als auch als Vollmeißel ausgebildet sein.As soon as the pipes s are raised by the height of the head piece α , the drill collar g is positioned in the center of the borehole and the chisel c drills a hole centrically. As a result, one of the chisels b is guided in such a way that it widens the hole under the pipes s, while the other chisels b crush the remaining surface of the rock. The drilling performance of the drill bit becomes greater, the more individual bits b are arranged; the chisel will also become less distracted, as the impact surface of the chisel will be considerably larger. The chisels cb can be designed both with channels for flushing water and as full chisels.

Claims (1)

Patent-Anspruch:Patent claim: Excentrischer Bohrmeißel mit oder ohne Wasserspülung zum Vorbohren und gleichzeitigen Nachbohren unter Erweiterung des Bohrloches unterhalb der Futterrohre, dadurch gekennzeichnet, daß das Nachbohren und Erweitern des Bohrloches durch mehrere Einzelmeißel (b) erfolgt, welche in einem excentrischen Kopfstück (a) um den führenden Vorbohrmeißel (c) angeordnet sind.Eccentric drill bit with or without water flushing for pre-drilling and simultaneous post-drilling while widening the borehole below the casing, characterized in that the post-drilling and widening of the borehole is carried out by several individual bits (b) which are placed in an eccentric head piece (a) around the leading pre-drilling bit ( c) are arranged. Hierzu ι Blatt Zeichnungen.For this purpose ι sheet of drawings.
DENDAT115257D Active DE115257C (en)

Publications (1)

Publication Number Publication Date
DE115257C true DE115257C (en)

Family

ID=384687

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT115257D Active DE115257C (en)

Country Status (1)

Country Link
DE (1) DE115257C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE739379C (en) * 1941-11-01 1943-09-23 Bergbau Und Huettenbedarf Ag F Step drill
EP0058061A2 (en) * 1981-02-07 1982-08-18 DRILLING & SERVICE U.K. LIMITED Tools for underground formations

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE739379C (en) * 1941-11-01 1943-09-23 Bergbau Und Huettenbedarf Ag F Step drill
EP0058061A2 (en) * 1981-02-07 1982-08-18 DRILLING & SERVICE U.K. LIMITED Tools for underground formations
EP0058061A3 (en) * 1981-02-07 1982-09-01 DRILLING & SERVICE U.K. LIMITED Tools for underground formations

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