WO2012038583A1 - Procédé et appareil pour forage de fond de trou - Google Patents

Procédé et appareil pour forage de fond de trou Download PDF

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Publication number
WO2012038583A1
WO2012038583A1 PCT/FI2011/050587 FI2011050587W WO2012038583A1 WO 2012038583 A1 WO2012038583 A1 WO 2012038583A1 FI 2011050587 W FI2011050587 W FI 2011050587W WO 2012038583 A1 WO2012038583 A1 WO 2012038583A1
Authority
WO
WIPO (PCT)
Prior art keywords
drilling
casing
casing part
flushing medium
flushing
Prior art date
Application number
PCT/FI2011/050587
Other languages
English (en)
Inventor
Kai Gylling
Original Assignee
Oy Atlas Copco Rotex Ab
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 Oy Atlas Copco Rotex Ab filed Critical Oy Atlas Copco Rotex Ab
Publication of WO2012038583A1 publication Critical patent/WO2012038583A1/fr

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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
    • E21B10/64—Drill bits characterised by the whole or part thereof being insertable into or removable from the borehole without withdrawing the drilling pipe
    • 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
    • E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids

Definitions

  • the invention relates to a method and apparatus for down-the-hole drilling according to the preambles of the independent claims .
  • a drilling head of a drilling unit of the drilling apparatus presented in this patent existing inside a casing part or in other words in a so called casing pipe, is formed of a first frame part and an annular second frame part, in the drilling surfaces of which there has been arranged drilling organs, such as drill bits or like, of the first and second drilling means or in other words of a center drill or a pilot and a reamer.
  • the first drilling means that is the first frame part forming the pilot is being released from the second frame part forming the reamer, in order to pull the same alone off from a drilled hole after the drilling situation.
  • the second organs of the flushing means for removal of drilling waste being generated are arranged to lead drilling waste by means of an assembly, which connects the said drilling means together for a drilling situation unro- tatively in respect with each other and in both directions longitudinally, which is in other words carried out as an advantageous embodiment by loosening grooves, belonging to a bayonet coupling, placed longitudinally in the outer periphery of the first frame part.
  • the drilling apparatus enabled by the patent mentioned above has been proven efficient and also to be easily modified according to different drilling purposes during the multiyear experience in practice. Regarding the same, however, possibilities for further improvement especially for placement and wear fatigue of the first and second drilling means' drilling organs, such as e.g. of the drill bits, have been found out, because the flushing medium and the drilling waste being generated are led straight inside the casing part from the drilling unit's drilling surface, or in other words with return flow holes and longitudinal flow ducts situated in radial direction between the pilot and the reamer. It is an aim of the method and apparatus according to the present invention to achieve a decisive improvement in the functioning of especially the type of a drilling apparatus described above and thus to raise essentially the level of prior art. In order to carry out this aim, the method and apparatus according to the invention are mainly characterized by what has been presented in the characterizing parts of the independent claims related thereto.
  • the leading of the flushing medium on the drilling surface of the drilling means continuously in a radial direction from the import openings from the pilot's drilling surface to the reamer' s outer periphery significantly enhances the flushing of the reamer's drilling organs especially, when the flushing medium may drift to them as efficiently as to the pilot's drilling organs, which is advantageously carried out by radial guide grooves in the pilot's and reamer's drilling surfaces. Therefore, thanks to the enhanced flushing of the reamer's drilling organs, it is possible to significantly increase their drilling efficiency and operating time.
  • the drilling unit includes; first drilling means 4 at a drilling head I thereof for drilling a center hole and second drilling means 5 for reaming the center hole for the casing part 2, whereby the essentially rotationally symmetrical first drilling means and the second drilling means 4, 5 are coupled mutually first of all in a power transmitting manner in order to carry out cooperation thereof at least during a drilling situation for a rotational motion w4, a feeding motion z4 and/or a hammering motion t4 and on the other hand removably in order to enable removal of the first drilling means from a drilled hole and, whereby the casing part 2 is arranged to be drawn into the hole to be drilled by the first and/or the second dril- ling means; and a flushing flow arrangement 6, whereby a flushing medium is first of all fed by first flushing means 6a for drilling and on the other hand the flushing medium and drilling waste getting generated is removed by second flushing means 6b inside the casing part 2.
  • the flushing medium is led at least partly in connection with the drilling surfaces Pi, P2 of both the first and the second drilling means 4, 5 essentially radially r to an outer periphery of the second dril- ling means 5, in order to lead the flushing medium and the drilling waste inside the casing part 2 through an inlet opening assembly 6bx that is placed in a longitudinal direction s after the first and the second dril- ling means 4, 5.
  • the method according to the invention is being exploited advantageously when operating with a drilling apparatus, in which the drilling head I of the drilling device's 1 drilling unit 3 is formed of a first frame part 4a and a second frame part 5a, wherein the drilling surfaces PI, P2 formed of end surfaces of the above frame parts are provided with drilling organs of the first and the second drilling means 4, 5, such as an integrated drilling part, separate drilling pieces, bits or like and, whereby a casing shoe 8 is exploited in order to couple the drilling unit 3 at an end of the casing part 2, the casing shoe being coupled with the drilling unit 3 by a joint assembly L enabling rotative motion of the casing shoe and limiting its longitudinal movement.
  • the flushing medium and the drilling waste are being led as an advantageous embodiment according to the principle, shown e.g. in figure 2, inside casing part 2 through one or more inlet openings 6bxl in the casing shoe 8.
  • the flushing medium and the drilling waste are being led inside the casing part 2 through one or more inlet openings 6bx2 existing therein.
  • the flushing medium is led through one or more import openings 6a; 6al that exist on a drilling surface PI of the first drilling means 4, such as the first frame part 4a, to the outer periphery of the second drilling means 5, such as the second frame part 5a, by means of one or more essentially radially directed r and uninterruptedly continuing guide grooves 6a; 6a2 that exist on the drilling surfaces PI, P2 of the first and the second drilling means.
  • the flushing medium and the drilling waste are being led by one or more flow grooves 6b; 6bl passing essentially longitudinally s on a side surface of the second drilling means 5, such as the second frame part 5a, toward the inlet opening assembly 6bx.
  • the invention also relates to an apparatus for down- the-hole drilling as presented above, the apparatus having a drilling device 1 that consists of a casing part 2 and a drilling unit 3 that exists at least during a drilling situation essentially inside thereof.
  • the drilling unit includes; first drilling means 4, such as a pilot, and second drilling means 5, such as a reamer, whereby the essentially rotationally symmet- rical first drilling means and the second drilling means 4, 5 are coupled mutually by means of a coupling assembly (which has not been presented in detail in the drawings) first of all in a power transmitting manner in order to carry out cooperation thereof at least during a drilling situation for a rotational motion w4, a feeding motion z4 and/or a hammering motion t4 and on the other hand removably in order to enable removal of the first drilling means from a drilled hole and, whereby the casing part 2 is arranged to be drawn into the hole to be drilled by the first and/or second drilling means; and a flushing flow arrangement
  • an inlet opening assembly 6bx for leading of the flushing medium, being led essentially radially r at least partly in connection with the drilling surfaces PI, P2 of both the first and the second drilling means 4, 5 to an outer periphery of the second drilling means 5, and the drilling waste inside the casing part 2.
  • the drilling head I of the drilling device's 1 drilling unit 3 is formed of a first frame part 4a and a second frame part 5a, wherein the drilling surfaces PI, P2 formed of end surfaces of the above frame parts are provided with drilling organs of the first and the second drilling means 4, 5, such as an integrated drilling part, separate drilling pieces, bits or like and, whereby the drilling unit 3 is coupled by a casing shoe 8 at an end of the casing part 2, the casing shoe being coupled with the drilling unit 3 by a joint assembly L enabling rotative motion of the casing shoe and limiting its longitudinal movement.
  • the inlet opening assembly 6bx comprises one or more inlet openings 6bxl in the casing shoe 8 for leading of the flushing medium and the drilling waste inside the casing part 2.
  • the inlet opening assembly 6bx comprises one or more inlet openings 6bx2 in the casing part 2 for leading of the flushing medium and the drilling waste inside the casing part 2.
  • the drilling surfaces PI, P2 of the first and the second drilling means 4, 5 are provided with essentially radially directed r and uninterruptedly continuing guide grooves 6a; 6a2 in order to lead the flushing medium from one or more import openings 6a; 6al that exist on the drilling surface PI of the first drilling means 4 to the outer periphery of the second drilling means 5.
  • a side surface of the second drilling means 5, such as the second frame part 5a, is provided with one or more flow grooves 6b; 6bl passing thereon essentially longitudinally s for leading of the flushing medium and the drilling waste toward the inlet opening assembly 6bx.
  • an extra flow arrangement 6by may be exploited that on the principle presented e.g. in figure 5 leads a part of the flushing medium straight inside the casing part 2 with one or more extra flow grooves 6byl situated inside the pilot in order to e.g. keep the inlet openings 6bxl in the ca- sing shoe 8 open.
  • the drifting of the flushing medium and the drilling waste inside the casing part 2 may also be arranged partially from the drilling surface with an extra flow groove 6by2 that is led through from inside the pilot or traditionally from between the pilot and the reamer (which, however, has not been presented in the drawings) .
  • the implementations ex- plained above are necessary especially in such drilling locations, where the controlling of the amount of the flushing medium led into the ground is necessary.

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)

Abstract

L'invention porte sur un procédé et sur un appareil pour forage de fond de trou, le forage étant effectué par un appareil ayant un dispositif de forage constitué par une partie enveloppe (2) et une unité de forage (3) à l'intérieur de celle-ci. L'unité de forage comprend : des premiers moyens de forage (4) pour forer un trou central et des seconds moyens de forage (5) pour aléser le trou central pour l'enveloppe (2). Les premiers moyens de forage et les seconds moyens de forage (4, 5) sont couplés de façon libérable entre eux. La partie enveloppe (2) est conçue de façon à être tirée dans le trou par les premiers et/ou seconds moyens de forage (4, 5). Un milieu de rinçage est acheminé par l'intermédiaire de rainures (6a ; 6a2) s'étendant essentiellement radialement (r) dans les surfaces de forage (P1, P2) à la fois des premiers et des seconds moyens de forage (4, 5), vers une périphérie externe des seconds moyens de forage (5), et, également, à l'intérieur de l'enveloppe (2) par l'intermédiaire d'un ensemble d'ouverture d'entrée (6bx) qui est placé dans une direction longitudinale après les premier et second moyens de forage (4, 5).
PCT/FI2011/050587 2010-09-23 2011-06-20 Procédé et appareil pour forage de fond de trou WO2012038583A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20105983A FI20105983A0 (fi) 2010-09-23 2010-09-23 Menetelmä ja laitteisto uppoporaukseen
FI20105983 2010-09-23

Publications (1)

Publication Number Publication Date
WO2012038583A1 true WO2012038583A1 (fr) 2012-03-29

Family

ID=42829713

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2011/050587 WO2012038583A1 (fr) 2010-09-23 2011-06-20 Procédé et appareil pour forage de fond de trou

Country Status (2)

Country Link
FI (1) FI20105983A0 (fr)
WO (1) WO2012038583A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10975664B2 (en) 2018-08-17 2021-04-13 Ancor-Loc (Nz) Limited Well or bore clearing tool

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8509145U1 (de) * 1985-03-27 1985-05-15 Ing. Günter Klemm, Spezialunternehmen für Bohrtechnik, 5962 Drolshagen Bohrvorrichtung
EP0948701A1 (fr) * 1996-11-12 1999-10-13 Techmo Entwicklungs- und Vertriebs GmbH Procede et dispositif pour forer et revetir en meme temps des trous
US20050103527A1 (en) * 2003-11-13 2005-05-19 Church Kris L. Dual wall drill string assembly
WO2010043757A1 (fr) * 2008-10-13 2010-04-22 Oy Atlas Copco Rotex Ab Procédé et appareil de forage pour forage en fond de trou

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8509145U1 (de) * 1985-03-27 1985-05-15 Ing. Günter Klemm, Spezialunternehmen für Bohrtechnik, 5962 Drolshagen Bohrvorrichtung
EP0948701A1 (fr) * 1996-11-12 1999-10-13 Techmo Entwicklungs- und Vertriebs GmbH Procede et dispositif pour forer et revetir en meme temps des trous
US20050103527A1 (en) * 2003-11-13 2005-05-19 Church Kris L. Dual wall drill string assembly
WO2010043757A1 (fr) * 2008-10-13 2010-04-22 Oy Atlas Copco Rotex Ab Procédé et appareil de forage pour forage en fond de trou

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10975664B2 (en) 2018-08-17 2021-04-13 Ancor-Loc (Nz) Limited Well or bore clearing tool

Also Published As

Publication number Publication date
FI20105983A0 (fi) 2010-09-23

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