EP0678150B1 - Improved rotary roller reamer - Google Patents
Improved rotary roller reamer Download PDFInfo
- 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
Links
- 239000000314 lubricant Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 6
- 239000003082 abrasive agent Substances 0.000 claims description 5
- 239000004519 grease Substances 0.000 abstract description 7
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 230000000717 retained effect Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 230000020347 spindle assembly Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
Images
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)
Abstract
Description
Claims (8)
- An improved rotary roller reamer (10) of the type used in boreholes, and comprising a body having rollers (11) contained in respective recesses defined by walls extending along a body of the reamer,
the reamer comprising pairs of blocks (14), means retaining the blocks (15) in the ends of said recesses, respective spindles (13) carried by and extending between the blocks (14) of each pair,
walls defining a cylindrical passage (19) extending in an axial direction in each said spindle (13), and further walls defining an aperture (31) extending from said cylindrical passage (19) to an outer surface of said spindle (30),
a said roller (11) having an inner bearing surface (34) rotatable on the outer surface of said spindle (13),
characterised in that the reamer (10) further comprises a piston (21) freely floatable in said cylindrical passage (19) between an outer end of said cylindrical passage (40) and said aperture (31), and is so arranged that pressure imparted to an outer end (35) of said piston (21) is the pressure of the environment which surrounds said reamer, and is imparted by said piston (21) to lubricant when contained in said cylindrical passage (19) and effective to impel flow of said lubricant through said aperture (31) to said bearing surface (34). - An improved roller reamer (10) according to claim 1 further characterised in that said cylindrical passage (19) opens to one end of said spindle (40), and at that said spindle end (41), walls define a breather space (22) extending from said passage to an environment which surrounds said reamer, such that said pressure imparted to the outer end of said piston (35) is the pressure of the environment which surrounds said reamer (10).
- An improved roller reamer (10) according to claim 2 characterised by walls defining a further passage (33) which is a second cylindrical passage extending in an axial direction from the other end of said spindle (42), and walls defining a second aperture (32) extending from said second cylindrical passage (33) to said outer surface of said spindle (30), each said aperture being diametral.
- An improved roller reamer (10) according to claim 3 characterised in that said second cylindrical passage (33) terminates at said other end of said spindle (42) in a pressure plug (27).
- An improved roller reamer (10) according to any preceding claim further characterised by a tube (20) contained within said spindle (13), the first said passage (19) being defined by-an inner surface of said tube (20).
- An improved roller reamer (10) according to claim 4 characterised in that said spindle outer surface is generally cylindrical, but has a flat portion (30) to which each diametral aperture (31, 32) opens.
- An improved roller reamer (10) according to any preceding claim further characterised by two pairs of seals (28, 29), one pair at or near each end of said spindle, the outer seal of each said pair (29) sealing between a said block (14), spindle (13) and roller (11) and performing the function of reducing ingress of abrasive material, and the inner seal of each said pair (28) sealing between said spindle (13) and roller (11) and sealing the lubricant against expulsion.
- An improved roller reamer (10) according to any preceding claim further characterised by retainer fasteners (15) co-acting between said blocks (14) and said spindle (13) to restrain rotation of said spindle (13).
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPM2305/93 | 1993-11-10 | ||
AUPM230593 | 1993-11-10 | ||
AUPM230593 | 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 (en) | 1995-10-25 |
EP0678150A4 EP0678150A4 (en) | 1999-06-16 |
EP0678150B1 true EP0678150B1 (en) | 2003-06-04 |
Family
ID=3777338
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95900553A Expired - Lifetime EP0678150B1 (en) | 1993-11-10 | 1994-11-10 | Improved rotary roller reamer |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0678150B1 (en) |
AT (1) | ATE242417T1 (en) |
BG (1) | BG62058B1 (en) |
CA (1) | CA2154285C (en) |
DE (1) | DE69432786T2 (en) |
HU (1) | HU218196B (en) |
RU (1) | RU2105122C1 (en) |
WO (1) | WO1995013452A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0006757D0 (en) * | 2000-03-22 | 2000-05-10 | Design Engineering Limited | Roller reamer with thrust bearing |
EP1561002B1 (en) | 2002-11-07 | 2010-01-20 | Extreme Machining Australia PTY Ltd | An improved rotary roller reamer |
WO2008006146A1 (en) * | 2006-07-12 | 2008-01-17 | Omni Oil Technologies | A roller reamer |
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 (en) * | 2015-03-05 | 2016-03-27 | ООО "Камышинский завод бурового инструмента" (ООО "КЗБИ") | Drill bit roller cutter |
RU2612171C1 (en) * | 2015-09-09 | 2017-03-02 | Общество с ограниченной ответственностью "Камышинский завод бурового инструмента" (ООО "КЗБИ") | Drill bit roller cutter |
Family Cites Families (9)
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 (en) * | 1964-06-24 | 1965-08-06 | Aquitaine Petrole | Improvements to roller bits used for drilling |
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 |
-
1994
- 1994-11-10 AT AT95900553T patent/ATE242417T1/en active
- 1994-11-10 RU RU95114368A patent/RU2105122C1/en active
- 1994-11-10 CA CA002154285A patent/CA2154285C/en not_active Expired - Lifetime
- 1994-11-10 HU HU9502230A patent/HU218196B/en unknown
- 1994-11-10 WO PCT/AU1994/000691 patent/WO1995013452A1/en active IP Right Grant
- 1994-11-10 EP EP95900553A patent/EP0678150B1/en not_active Expired - Lifetime
- 1994-11-10 DE DE69432786T patent/DE69432786T2/en not_active Expired - Lifetime
-
1995
- 1995-08-03 BG BG99845A patent/BG62058B1/en unknown
Also Published As
Publication number | Publication date |
---|---|
HU9502230D0 (en) | 1995-09-28 |
DE69432786D1 (en) | 2003-07-10 |
RU2105122C1 (en) | 1998-02-20 |
CA2154285C (en) | 2005-10-11 |
HUT72293A (en) | 1996-04-29 |
HU218196B (en) | 2000-06-28 |
CA2154285A1 (en) | 1995-05-18 |
WO1995013452A1 (en) | 1995-05-18 |
BG99845A (en) | 1996-04-30 |
EP0678150A4 (en) | 1999-06-16 |
BG62058B1 (en) | 1999-01-29 |
EP0678150A1 (en) | 1995-10-25 |
ATE242417T1 (en) | 2003-06-15 |
DE69432786T2 (en) | 2004-05-13 |
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