EP0678150B1 - Verbesserter rotierender räumer mit rollen - Google Patents

Verbesserter rotierender räumer mit rollen Download PDF

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Publication number
EP0678150B1
EP0678150B1 EP95900553A EP95900553A EP0678150B1 EP 0678150 B1 EP0678150 B1 EP 0678150B1 EP 95900553 A EP95900553 A EP 95900553A EP 95900553 A EP95900553 A EP 95900553A EP 0678150 B1 EP0678150 B1 EP 0678150B1
Authority
EP
European Patent Office
Prior art keywords
spindle
reamer
roller
passage
cylindrical passage
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.)
Expired - Lifetime
Application number
EP95900553A
Other languages
English (en)
French (fr)
Other versions
EP0678150A1 (de
EP0678150A4 (de
Inventor
John Francis Kennedy
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.)
Gearhart United Pty Ltd
Original Assignee
Gearhart United Pty Ltd
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 Gearhart United Pty Ltd filed Critical Gearhart United Pty Ltd
Publication of EP0678150A1 publication Critical patent/EP0678150A1/de
Publication of EP0678150A4 publication Critical patent/EP0678150A4/de
Application granted granted Critical
Publication of EP0678150B1 publication Critical patent/EP0678150B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E21B10/08—Roller bits
    • E21B10/22—Roller bits characterised by bearing, lubrication or sealing details
    • E21B10/24—Roller bits characterised by bearing, lubrication or sealing details characterised by lubricating details
    • 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
    • E21B10/28—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with non-expansible roller cutters
    • E21B10/30—Longitudinal axis roller reamers, e.g. reamer stabilisers

Definitions

  • This invention relates to a rotary roller reamer of the general type which is used in boreholes, and described and illustrated in the Applicant's earlier Australian Patent No. 594885.
  • GB 2053319 describes an earth boring apparatus having a reamer-stabiliser unit.
  • the unit incorporates a spring mounted piston.
  • the external pressures on the unit act on the piston which, together with the spring to move the piston and lubricant located in front of the piston towards a bearing area.
  • the main object of this invention is to provide a more satisfactory bearing arrangement, and this has been achieved by utilising a piston which floats freely in a cylindrical lubricant passage and lies between a bearing surface of the roller and the pressure space exterior of the roller, so that the piston will apply the same pressure to lubricant as the external pressure, thereby reducing the pressure differential and in turn retaining the lubricant in the bearing structure.
  • a rotary roller reamer 10 is of the type which is used for reaming a hole cut by a drill on the end of a drill string.
  • the functions of a reamer are first to maintain a hole size when wear causes the effective diameter of a drill to reduce, and second to smooth the surface of the borehole.
  • the rotary roller reamer arrangement of this invention performs those functions.
  • the reamer 10 shown in Fig. 1 contains several rollers 11 each with a plurality of tungsten carbide buttons 12 arranged circumferentially around it.
  • Patent 594885 there was described and illustrated an arrangement wherein retaining edges retained respective blocks in recesses extending axially along a reamer roller, and the blocks in that description contained bushes with O-rings at each end.
  • the bearings were therefore external of the rollers, and assembly was effected at atmospheric pressure but when immersed into a deep bore hole containing water, there was a large pressure differential which was effective in forcing abrasive material past the O-rings and into contact with the bearing surfaces, and an object of this invention as said is to avoid that difficulty.
  • the spindle 13 is retained in respect to the blocks 14 either by retainer fasteners, herein grub screws 15, and these come away with the blocks 14 when they are removed so that they can be separately removed and there is no access difficulty as with the early prior art.
  • passages 19, 33 Running centrally part way into the spindle 13 from its end 41, 42 are passages 19, 33, shown partly in Fig 2 as being formed by the walls of an opening extending from one end, and partly by the bore of a tube 20 extending from the other 40, the wall of tube 20 functioning as a heat transfer wall to reduce surface temperatures of the adjacent bearing.
  • the tube 20 is illustrated to contain a piston 21 which can conveniently be of elastomeric material, and that piston is freely slidable within the tube 20.
  • the outer end 40 of the tube 20 opens to a "breather" aperture 22 in the reamer body, and the piston then being slidable imparts the same pressure inside the passage 19 as exists around the drill string, with very little pressure differential.
  • the interior of the roller is charged with grease through a pressure plug 27, and that grease is pressured by the piston 21 to be the same as the external pressure. It is possible to use two resilient seals, and the resilient seals 28 between spindle 13 and roller 11 are lubricated by the grease and seal it against expulsion, while the resilient seals 29 sealing between a said block 14, spindle 13 and roller 11, and performing the primary function of reducing the ingress of abrasive material to the seals 28 and the secondary function of partly effecting a seal against an ingress of moisture.
  • the spindle 13 is provided with two flats 30 connected to the passages 19, 33 through diametral apertures 31, 32 and this lubrication is of great importance in the difficult environment of a bore hole, flow of grease being impelled from tube 20 to the flats 30, and thereby to the bearing surface 34 of spindle 13, by externally supplied pressure.

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)
  • Rolls And Other Rotary Bodies (AREA)
  • Massaging Devices (AREA)
  • Sliding-Contact Bearings (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Joints Allowing Movement (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)
  • Cleaning In General (AREA)

Claims (8)

  1. Verbesserter, mit Rollen versehener drehbarer Räumer (10) für Bohrlöcher, der einen Körper mit Rollen (11) umfasst, die jeweils in Ausnehmungen enthalten sind, die durch sich entlang eines Körpers des Räumers erstreckende Wände gebildet sind, wobei der Räumer umfasst:
    Paare von Blöcken (14), Mittel (15) zum Halten der Blöcke an den Enden der Ausnehmungen. jeweils Spindeln (13), die durch die Blöcke jedes Paares geführt sind und sich zwischen den Blöcken (14) jedes Paares erstrecken;
    Wände, die einen zylindrischen Kanal (19) definieren, der sich in axialer Richtung in jeder Spindel (13) erstreckt, und darüber hinaus Wände, die eine Öffnung (31) definieren, die von dem zylindrischen Kanal (19) zu einer Außenfläche (30) der Spindel verläuft;
    wobei eine besagte Rolle (11) eine innere Lagerfläche (34) aufweist, die auf der Außenfläche der Spindel (13) drehbar ist,
    dadurch gekennzeichnet, dass der Räumer (10) des Weiteren einen Kolben (21) umfasst, der in dem zylindrischen Kanal (19) zwischen einem äußeren Ende (40) und der Öffnung (31) frei schwimmend beweglich ist und so angeordnet ist, dass der auf eine Außenseite (35) des Kolbens (21) ausgeübte Druck der den Räumer umgebende Umgebungsdruck ist, und durch den Kolben (21) auf ein Schmiermittel, wenn dieses in dem zylindrischen Kanal (19) enthalten ist, übertragen wird, und effektiv in der Lage ist, den Schmiermittelstrom durch die Öffnung (31) zur Lagerfläche (34) zu treiben.
  2. Rollenräumer nach Anspruch 1, dadurch gekennzeichnet, dass der zylindrische Kanal (19) an einem Ende der Spindel (13) offen ist (40) und an diesem Spindelende (41) Wände einen Belüftungsraum (22) definieren, der sich von dem Kanal bis zu der Umgebung erstreckt, die den Räumer (10) umgibt, so dass der auf die nach außen weisende Seite des Kolbens (35) ausgeübte Druck dem an der Außenseite des Räumers (10) herrschenden Umgebungsdruck entspricht.
  3. Rollenräumer nach Anspruch 2, gekennzeichnet durch Wände, die einen weiteren Kanal (33) definieren, der ein zweiter, sich in axialer Richtung vom anderen Ende (42) der Spindel erstreckender zylindrischer Durchgang ist, sowie Wände, die eine zweite Öffnung (32) definieren, die sich von dem zweiten zylindrischen Kanal (33) zur Außenfläche (30) der Spindel (13) erstreckt, wobei die jeweiligen Öffnungen diametral angeordnet sind.
  4. Rollenräumer nach Anspruch 3, dadurch gekennzeichnet, dass der zweite zylindrische Kanal (33) am anderen Ende (42) der Spindel (13) durch einen Druckstopfen (27) verschlossen ist.
  5. Rollenräumer nach einem der vorhergehenden Ansprüche, gekennzeichnet durch ein innerhalb der Spindel (13) angeordnetes Rohr (20), wobei der erste Kanal (19) durch eine Innenfläche des Rohres (20) gebildet wird.
  6. Rollenräumer nach Anspruch 4, dadurch gekennzeichnet, dass die Außenfläche der Spindel (13) im Wesentlichen zylindrisch ist, aber einen ebenen Abschnitt (30) aufweist, an dem die jeweils diametralen Öffnungen (31, 32) münden.
  7. Rollenräumer nach einem der vorhergehenden Ansprüche, gekennzeichnet durch zwei Paare von Dichtungen (28, 29), wobei jeweils ein Paar am Ende oder in der Nähe des Endes der Spindel (13) angeordnet ist und die äußere Dichtung (29) jedes Dichtungspaares zwischen dem Block (14). der Spindel (13) und der Rolle (11) abdichtet und zur Verringerung des Eindringens von abrasivem Material dient, und die innere Dichtung (28) jedes Dichtungspaares als Dichtung zwischen der Spindel (13) und der Rolle (11) vorgesehen ist und das Austreten von Schmiermittel verhindert.
  8. Rollenräumer nach einem der vorhergehenden Ansprüche, gekennzeichnet durch Halteschrauben (15), die zwischen den Blöcken (14) und der Spindel (13) wirken, um eine Drehbewegung der Spindel (13) zu verhindern.
EP95900553A 1993-11-10 1994-11-10 Verbesserter rotierender räumer mit rollen Expired - Lifetime EP0678150B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AUPM230593 1993-11-10
AUPM230593 1993-11-10
AUPM2305/93 1993-11-10
PCT/AU1994/000691 WO1995013452A1 (en) 1993-11-10 1994-11-10 Improved rotary roller reamer

Publications (3)

Publication Number Publication Date
EP0678150A1 EP0678150A1 (de) 1995-10-25
EP0678150A4 EP0678150A4 (de) 1999-06-16
EP0678150B1 true EP0678150B1 (de) 2003-06-04

Family

ID=3777338

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95900553A Expired - Lifetime EP0678150B1 (de) 1993-11-10 1994-11-10 Verbesserter rotierender räumer mit rollen

Country Status (8)

Country Link
EP (1) EP0678150B1 (de)
AT (1) ATE242417T1 (de)
BG (1) BG62058B1 (de)
CA (1) CA2154285C (de)
DE (1) DE69432786T2 (de)
HU (1) HU218196B (de)
RU (1) RU2105122C1 (de)
WO (1) WO1995013452A1 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0006757D0 (en) * 2000-03-22 2000-05-10 Design Engineering Limited Roller reamer with thrust bearing
CN101956532B (zh) * 2002-11-07 2013-04-17 澳大利亚精细加工股份有限公司 一种改进的旋转辊扩孔器
EP2038509A1 (de) * 2006-07-12 2009-03-25 Omni Oil Technologies Rollenräumer
GB2472848A (en) 2009-08-21 2011-02-23 Paul Bernard Lee Downhole reamer apparatus
AU2012220846B2 (en) * 2011-02-17 2016-02-18 The Robbins Company Cutter assembly for tunnel boring machine with pressure compensation
US9157282B2 (en) 2011-11-30 2015-10-13 Smith International, Inc. Roller reamer compound wedge retention
RU2579101C1 (ru) * 2015-03-05 2016-03-27 ООО "Камышинский завод бурового инструмента" (ООО "КЗБИ") Шарошка бурового долота
RU2612171C1 (ru) * 2015-09-09 2017-03-02 Общество с ограниченной ответственностью "Камышинский завод бурового инструмента" (ООО "КЗБИ") Шарошка бурового долота

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB176048A (en) * 1920-10-25 1922-02-27 Clarence Edward Reed Improvements in or relating to well-boring drills
FR1407776A (fr) * 1964-06-24 1965-08-06 Aquitaine Petrole Perfectionnements apportés aux trépans à molettes utilisés pour le forage
CA1016534A (en) * 1972-12-29 1977-08-30 Kenneth M. White Roller reamer stabilizer
CA1018511A (en) * 1975-06-15 1977-10-04 Derek B. Berthiaume Eccentric stabilizer
CA1044220A (en) * 1976-12-16 1978-12-12 Bralorne Resources Limited Stabilizer with replaceable sub-assemblies
US4254839A (en) * 1979-06-21 1981-03-10 Dresser Industries, Inc. Radial force anti-extrusion device for sealed drill string unit
US4792000A (en) * 1986-08-04 1988-12-20 Oil Patch Group, Inc. Method and apparatus for well drilling
GB8700109D0 (en) * 1987-01-06 1987-02-11 Darron Tool & Eng Sheffield Lt Drill member
AU594885C (en) * 1987-07-07 2004-10-07 Gearhart United Pty Ltd Rotary roller reamer

Also Published As

Publication number Publication date
HU9502230D0 (en) 1995-09-28
HUT72293A (en) 1996-04-29
DE69432786D1 (de) 2003-07-10
WO1995013452A1 (en) 1995-05-18
EP0678150A1 (de) 1995-10-25
BG99845A (bg) 1996-04-30
EP0678150A4 (de) 1999-06-16
CA2154285A1 (en) 1995-05-18
ATE242417T1 (de) 2003-06-15
CA2154285C (en) 2005-10-11
BG62058B1 (bg) 1999-01-29
RU2105122C1 (ru) 1998-02-20
HU218196B (hu) 2000-06-28
DE69432786T2 (de) 2004-05-13

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