CA2155392A1 - Drill Bit Having Enhanced Cutting Structure and Stabilizing Features - Google Patents

Drill Bit Having Enhanced Cutting Structure and Stabilizing Features

Info

Publication number
CA2155392A1
CA2155392A1 CA2155392A CA2155392A CA2155392A1 CA 2155392 A1 CA2155392 A1 CA 2155392A1 CA 2155392 A CA2155392 A CA 2155392A CA 2155392 A CA2155392 A CA 2155392A CA 2155392 A1 CA2155392 A1 CA 2155392A1
Authority
CA
Canada
Prior art keywords
bit
cutter elements
drill bit
cutter
elements
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.)
Granted
Application number
CA2155392A
Other languages
French (fr)
Other versions
CA2155392C (en
Inventor
Carl W. Keith
Graham Mensa-Wilmot
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.)
Smith International Inc
Original Assignee
Carl W. Keith
Graham Mensa-Wilmot
Smith International, Inc.
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
Priority claimed from US08/288,489 external-priority patent/US5582261A/en
Application filed by Carl W. Keith, Graham Mensa-Wilmot, Smith International, Inc. filed Critical Carl W. Keith
Publication of CA2155392A1 publication Critical patent/CA2155392A1/en
Application granted granted Critical
Publication of CA2155392C publication Critical patent/CA2155392C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/56—Button-type inserts
    • E21B10/567—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits
    • E21B10/55—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits with preformed cutting elements
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/56—Button-type inserts
    • E21B10/567—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts
    • E21B10/5673—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts having a non planar or non circular cutting face

Abstract

A fixed cutter drill bit includes sets of cutter elements mounted on the bit face, each set including at least two cutters that are mounted at generally the same radial position with respect to the bit axis. The cutter elements of a set are positioned on different blades of the bit and are mounted having their cutting faces are out-of-profile, such that certain elements in the set are exposed to the formation material to a greater extent than other cutter elements in the same set, or mounted with differing degrees of backrake, or both. The cutter elements in a set may have equal diameters or may vary in size and shape. The bit exhibits increased stability or vibration resistance, and drills initially as a "light-set" bit and later as a "heavy set" bit.
CA002155392A 1994-08-10 1995-08-03 Drill bit having enhanced cutting structure and stabilizing features Expired - Fee Related CA2155392C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US08/288,489 US5582261A (en) 1994-08-10 1994-08-10 Drill bit having enhanced cutting structure and stabilizing features
US08/288,489 1994-08-10
US08/310,862 US5549171A (en) 1994-08-10 1994-09-22 Drill bit with performance-improving cutting structure
US08/310,862 1994-09-22

Publications (2)

Publication Number Publication Date
CA2155392A1 true CA2155392A1 (en) 1996-02-11
CA2155392C CA2155392C (en) 1998-06-23

Family

ID=26965046

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002155392A Expired - Fee Related CA2155392C (en) 1994-08-10 1995-08-03 Drill bit having enhanced cutting structure and stabilizing features

Country Status (3)

Country Link
US (1) US5549171A (en)
CA (1) CA2155392C (en)
GB (1) GB2292163B (en)

Families Citing this family (111)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5592996A (en) * 1994-10-03 1997-01-14 Smith International, Inc. Drill bit having improved cutting structure with varying diamond density
US5551522A (en) * 1994-10-12 1996-09-03 Smith International, Inc. Drill bit having stability enhancing cutting structure
GB2294069B (en) * 1994-10-15 1998-10-28 Camco Drilling Group Ltd Improvements in or relating to rotary drills bits
EP0707130B1 (en) * 1994-10-15 2003-07-16 Camco Drilling Group Limited Rotary drill bits
GB9421924D0 (en) * 1994-11-01 1994-12-21 Camco Drilling Group Ltd Improvements in or relating to rotary drill bits
US5722499A (en) * 1995-08-22 1998-03-03 Smith International, Inc. Multiple diamond layer polycrystalline diamond composite cutters
US5803196A (en) * 1996-05-31 1998-09-08 Diamond Products International Stabilizing drill bit
US5816346A (en) * 1996-06-06 1998-10-06 Camco International, Inc. Rotary drill bits and methods of designing such drill bits
GB2353550B (en) * 1996-09-25 2001-04-11 Smith International Cutting element
US6164394A (en) * 1996-09-25 2000-12-26 Smith International, Inc. Drill bit with rows of cutters mounted to present a serrated cutting edge
US5924502A (en) * 1996-11-12 1999-07-20 Dresser Industries, Inc. Steel-bodied bit
GB9708022D0 (en) * 1997-04-21 1997-06-11 Camco Int Uk Ltd Curved blades and gauge
GB2359838B (en) * 1997-04-21 2002-03-13 Camco Internat Improvements in or relating to rotary drill bits
GB9712342D0 (en) * 1997-06-14 1997-08-13 Camco Int Uk Ltd Improvements in or relating to rotary drill bits
GB2361496B (en) * 1997-06-14 2002-02-20 Camco Internat Improvements in or relating to rotary drill bits
US6672406B2 (en) 1997-09-08 2004-01-06 Baker Hughes Incorporated Multi-aggressiveness cuttting face on PDC cutters and method of drilling subterranean formations
US7000715B2 (en) 1997-09-08 2006-02-21 Baker Hughes Incorporated Rotary drill bits exhibiting cutting element placement for optimizing bit torque and cutter life
US6230828B1 (en) 1997-09-08 2001-05-15 Baker Hughes Incorporated Rotary drilling bits for directional drilling exhibiting variable weight-on-bit dependent cutting characteristics
US6125947A (en) 1997-09-19 2000-10-03 Baker Hughes Incorporated Earth-boring drill bits with enhanced formation cuttings removal features and methods of drilling
US6345673B1 (en) 1998-11-20 2002-02-12 Smith International, Inc. High offset bits with super-abrasive cutters
US6460631B2 (en) * 1999-08-26 2002-10-08 Baker Hughes Incorporated Drill bits with reduced exposure of cutters
US6302223B1 (en) * 1999-10-06 2001-10-16 Baker Hughes Incorporated Rotary drag bit with enhanced hydraulic and stabilization characteristics
US6308790B1 (en) * 1999-12-22 2001-10-30 Smith International, Inc. Drag bits with predictable inclination tendencies and behavior
US6575256B1 (en) 2000-01-11 2003-06-10 Baker Hughes Incorporated Drill bit with lateral movement mitigation and method of subterranean drilling
US8082134B2 (en) * 2000-03-13 2011-12-20 Smith International, Inc. Techniques for modeling/simulating, designing optimizing, and displaying hybrid drill bits
DE60140617D1 (en) 2000-09-20 2010-01-07 Camco Int Uk Ltd POLYCRYSTALLINE DIAMOND WITH A SURFACE ENRICHED ON CATALYST MATERIAL
US6536543B2 (en) 2000-12-06 2003-03-25 Baker Hughes Incorporated Rotary drill bits exhibiting sequences of substantially continuously variable cutter backrake angles
US6615934B2 (en) * 2001-08-15 2003-09-09 Smith International, Inc. PDC drill bit having cutting structure adapted to improve high speed drilling performance
US7461709B2 (en) * 2003-08-21 2008-12-09 Smith International, Inc. Multiple diameter cutting elements and bits incorporating the same
US7624818B2 (en) * 2004-02-19 2009-12-01 Baker Hughes Incorporated Earth boring drill bits with casing component drill out capability and methods of use
US8448725B2 (en) * 2004-12-10 2013-05-28 Smith International, Inc. Impact resistant PDC drill bit
US7455125B2 (en) * 2005-02-22 2008-11-25 Baker Hughes Incorporated Drilling tool equipped with improved cutting element layout to reduce cutter damage through formation changes, methods of design and operation thereof
US7726415B1 (en) 2005-04-07 2010-06-01 Ots International, Inc. Fixed cutter drill bit
EP1957750A1 (en) * 2005-11-08 2008-08-20 Baker Hughes Incorporated Methods for optimizing efficiency and durability of rotary drag bits and rotary drag bits designed for optimal efficiency and durability
US8141665B2 (en) 2005-12-14 2012-03-27 Baker Hughes Incorporated Drill bits with bearing elements for reducing exposure of cutters
US7677333B2 (en) * 2006-04-18 2010-03-16 Varel International Ind., L.P. Drill bit with multiple cutter geometries
US20070261890A1 (en) * 2006-05-10 2007-11-15 Smith International, Inc. Fixed Cutter Bit With Centrally Positioned Backup Cutter Elements
US7621348B2 (en) * 2006-10-02 2009-11-24 Smith International, Inc. Drag bits with dropping tendencies and methods for making the same
US7896106B2 (en) * 2006-12-07 2011-03-01 Baker Hughes Incorporated Rotary drag bits having a pilot cutter configuraton and method to pre-fracture subterranean formations therewith
EP2118430A2 (en) * 2007-01-25 2009-11-18 Baker Hughes Incorporated Rotary drag bit
US8839888B2 (en) 2010-04-23 2014-09-23 Schlumberger Technology Corporation Tracking shearing cutters on a fixed bladed drill bit with pointed cutting elements
USD678368S1 (en) 2007-02-12 2013-03-19 David R. Hall Drill bit with a pointed cutting element
USD674422S1 (en) 2007-02-12 2013-01-15 Hall David R Drill bit with a pointed cutting element and a shearing cutting element
US7703557B2 (en) * 2007-06-11 2010-04-27 Smith International, Inc. Fixed cutter bit with backup cutter elements on primary blades
US7814997B2 (en) 2007-06-14 2010-10-19 Baker Hughes Incorporated Interchangeable bearing blocks for drill bits, and drill bits including same
US7926596B2 (en) * 2007-09-06 2011-04-19 Smith International, Inc. Drag bit with utility blades
US8869919B2 (en) * 2007-09-06 2014-10-28 Smith International, Inc. Drag bit with utility blades
US20090084607A1 (en) * 2007-10-01 2009-04-02 Ernst Stephen J Drill bits and tools for subterranean drilling
US20090084606A1 (en) * 2007-10-01 2009-04-02 Doster Michael L Drill bits and tools for subterranean drilling
US9016407B2 (en) * 2007-12-07 2015-04-28 Smith International, Inc. Drill bit cutting structure and methods to maximize depth-of-cut for weight on bit applied
US8100202B2 (en) * 2008-04-01 2012-01-24 Smith International, Inc. Fixed cutter bit with backup cutter elements on secondary blades
WO2010014725A2 (en) * 2008-07-30 2010-02-04 Baker Hughes Incorporated Earth boring drill bits with using opposed kerfing for cutters
US20100051352A1 (en) * 2008-08-27 2010-03-04 Baker Hughes Incorporated Cutter Pocket Inserts
US20100175929A1 (en) * 2009-01-09 2010-07-15 Baker Hughes Incorporated Cutter profile helping in stability and steerability
US9644428B2 (en) * 2009-01-09 2017-05-09 Baker Hughes Incorporated Drill bit with a hybrid cutter profile
GB0900606D0 (en) 2009-01-15 2009-02-25 Downhole Products Plc Tubing shoe
US8943663B2 (en) * 2009-04-15 2015-02-03 Baker Hughes Incorporated Methods of forming and repairing cutting element pockets in earth-boring tools with depth-of-cut control features, and tools and structures formed by such methods
EP2425089A4 (en) * 2009-04-30 2014-06-04 Baker Hughes Inc Bearing blocks for drill bits, drill bit assemblies including bearing blocks and related methods
US8517123B2 (en) * 2009-05-29 2013-08-27 Varel International, Ind., L.P. Milling cap for a polycrystalline diamond compact cutter
US8327944B2 (en) * 2009-05-29 2012-12-11 Varel International, Ind., L.P. Whipstock attachment to a fixed cutter drilling or milling bit
US20110209922A1 (en) * 2009-06-05 2011-09-01 Varel International Casing end tool
SG10201404788WA (en) 2009-06-05 2014-10-30 Varel Int Ind Lp Casing bit and casing reamer designs
US8887839B2 (en) * 2009-06-25 2014-11-18 Baker Hughes Incorporated Drill bit for use in drilling subterranean formations
BR112012000535A2 (en) 2009-07-08 2019-09-24 Baker Hughes Incorporatled cutting element for a drill bit used for drilling underground formations
WO2011005994A2 (en) 2009-07-08 2011-01-13 Baker Hughes Incorporated Cutting element and method of forming thereof
EP2459344A4 (en) 2009-07-27 2013-10-02 Baker Hughes Inc Abrasive article and method of forming
US8127869B2 (en) * 2009-09-28 2012-03-06 Baker Hughes Incorporated Earth-boring tools, methods of making earth-boring tools and methods of drilling with earth-boring tools
WO2011044147A2 (en) 2009-10-05 2011-04-14 Baker Hughes Incorporated Drill bits and tools for subterranean drilling, methods of manufacturing such drill bits and tools and methods of directional and off center drilling
US8505634B2 (en) * 2009-12-28 2013-08-13 Baker Hughes Incorporated Earth-boring tools having differing cutting elements on a blade and related methods
CA2788816C (en) * 2010-02-05 2015-11-24 Baker Hughes Incorporated Shaped cutting elements on drill bits and other earth-boring tools, and methods of forming same
SA111320374B1 (en) 2010-04-14 2015-08-10 بيكر هوغيس انكوبوريتد Method Of Forming Polycrystalline Diamond From Derivatized Nanodiamond
WO2011133850A2 (en) 2010-04-23 2011-10-27 Baker Hughes Incorporated Cutting elements for earth-boring tools, earth-boring tools including such cutting elements and related methods
US8851207B2 (en) 2011-05-05 2014-10-07 Baker Hughes Incorporated Earth-boring tools and methods of forming such earth-boring tools
SA111320671B1 (en) 2010-08-06 2015-01-22 بيكر هوغيس انكور Shaped cutting elements for earth boring tools, earth boring tools including such cutting elements, and related methods
CA2817695C (en) * 2010-11-10 2016-02-02 Halliburton Energy Services, Inc. System and method of constant depth of cut control of drilling tools
US8544568B2 (en) 2010-12-06 2013-10-01 Varel International, Inc., L.P. Shoulder durability enhancement for a PDC drill bit using secondary and tertiary cutting elements
US9103174B2 (en) 2011-04-22 2015-08-11 Baker Hughes Incorporated Cutting elements for earth-boring tools, earth-boring tools including such cutting elements and related methods
US9243452B2 (en) 2011-04-22 2016-01-26 Baker Hughes Incorporated Cutting elements for earth-boring tools, earth-boring tools including such cutting elements, and related methods
US9428966B2 (en) 2012-05-01 2016-08-30 Baker Hughes Incorporated Cutting elements for earth-boring tools, earth-boring tools including such cutting elements, and related methods
US8991525B2 (en) 2012-05-01 2015-03-31 Baker Hughes Incorporated Earth-boring tools having cutting elements with cutting faces exhibiting multiple coefficients of friction, and related methods
US9650837B2 (en) 2011-04-22 2017-05-16 Baker Hughes Incorporated Multi-chamfer cutting elements having a shaped cutting face and earth-boring tools including such cutting elements
US9482057B2 (en) 2011-09-16 2016-11-01 Baker Hughes Incorporated Cutting elements for earth-boring tools, earth-boring tools including such cutting elements and related methods
US9038752B2 (en) 2011-09-23 2015-05-26 Ulterra Drilling Tehcnologies, L.P. Rotary drag bit
CN104136705A (en) * 2011-12-29 2014-11-05 史密斯国际有限公司 Spacing of rolling cutters on a fixed cutter bit
SG11201404731YA (en) 2012-02-08 2014-09-26 Baker Hughes Inc Shaped cutting elements for earth-boring tools and earth-boring tools including such cutting elements
CA2875021C (en) 2012-05-30 2017-05-23 Halliburton Energy Services, Inc. Rotary drill bit and method for designing a rotary drill bit for directional and horizontal drilling
CA2879046A1 (en) 2012-07-13 2014-01-16 Halliburton Energy Services, Inc. Rotary drill bits with back-up cutting elements to optimize bit life
CN104956026B (en) 2012-12-03 2018-06-05 阿特拉钻孔技术有限合伙公司 Earth-boring tools with improved cutting members angle of heel arrangement
GB201302379D0 (en) * 2013-01-16 2013-03-27 Nov Downhole Eurasia Ltd Drill bit
GB2512272B (en) 2013-01-29 2019-10-09 Nov Downhole Eurasia Ltd Drill bit design
US9140072B2 (en) 2013-02-28 2015-09-22 Baker Hughes Incorporated Cutting elements including non-planar interfaces, earth-boring tools including such cutting elements, and methods of forming cutting elements
US10030452B2 (en) 2013-03-14 2018-07-24 Smith International, Inc. Cutting structures for fixed cutter drill bit and other downhole cutting tools
US10309156B2 (en) 2013-03-14 2019-06-04 Smith International, Inc. Cutting structures for fixed cutter drill bit and other downhole cutting tools
DE112013007395T5 (en) 2013-09-03 2016-05-25 Halliburton Energy Services, Inc. Drilling tool with multi-level cutting depth control
CN105793514B (en) 2013-12-06 2018-01-16 哈里伯顿能源服务公司 Include the rotary drilling-head of multilayer cutting element
CN105849355A (en) * 2013-12-18 2016-08-10 哈里伯顿能源服务公司 Cutting structure design with secondary cutter methodology
WO2015099718A1 (en) * 2013-12-26 2015-07-02 Halliburton Energy Services, Inc. Multilevel force balanced downhole drilling tools including cutting elements in a step profile configuration
US9828810B2 (en) 2014-02-07 2017-11-28 Varel International Ind., L.P. Mill-drill cutter and drill bit
WO2015127123A1 (en) 2014-02-20 2015-08-27 Ulterra Drilling Technologies, L.P. Drill bit
US10287825B2 (en) 2014-03-11 2019-05-14 Smith International, Inc. Cutting elements having non-planar surfaces and downhole cutting tools using such cutting elements
US9644429B2 (en) * 2014-04-01 2017-05-09 Chevron U.S.A. Inc. Specialized bit for challenging drilling environments
AR100890A1 (en) 2014-06-18 2016-11-09 Ulterra Drilling Tech Lp DRILLING BARRENA
USD775676S1 (en) * 2015-07-13 2017-01-03 Edward Matti Button drill bit
US10344537B2 (en) * 2016-07-28 2019-07-09 Baker Hughes Incorporated Earth-boring tools, methods of forming earth-boring tools, and methods of forming a borehole in a subterranean formation
US10458189B2 (en) 2017-01-27 2019-10-29 Baker Hughes, A Ge Company, Llc Earth-boring tools utilizing selective placement of polished and non-polished cutting elements, and related methods
US10612311B2 (en) 2017-07-28 2020-04-07 Baker Hughes, A Ge Company, Llc Earth-boring tools utilizing asymmetric exposure of shaped inserts, and related methods
US11480016B2 (en) * 2018-11-12 2022-10-25 Ulterra Drilling Technologies, L.P. Drill bit
US11008814B2 (en) * 2018-11-12 2021-05-18 Ulterra Drilling Technologies, Lp Drill bit
US11434698B2 (en) 2019-09-09 2022-09-06 Ulterra Drilling Technologies, L.P. Drill bit
GB2623265A (en) * 2021-08-03 2024-04-10 Nat Oilwell Varco Lp Fixed cutter drill bits and cutter element arrangements for same
CN116427854B (en) * 2023-06-13 2023-08-18 陕西中创卓安建设工程有限公司 Highway bridge pile foundation digs device soon

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4545441A (en) * 1981-02-25 1985-10-08 Williamson Kirk E Drill bits with polycrystalline diamond cutting elements mounted on serrated supports pressed in drill head
US4429755A (en) * 1981-02-25 1984-02-07 Williamson Kirk E Drill with polycrystalline diamond drill blanks for soft, medium-hard and hard formations
DE3113109C2 (en) * 1981-04-01 1983-11-17 Christensen, Inc., 84115 Salt Lake City, Utah Rotary drill bit for deep drilling
US4475606A (en) * 1982-08-09 1984-10-09 Dresser Industries, Inc. Drag bit
US4444281A (en) * 1983-03-30 1984-04-24 Reed Rock Bit Company Combination drag and roller cutter drill bit
US4512426A (en) * 1983-04-11 1985-04-23 Christensen, Inc. Rotating bits including a plurality of types of preferential cutting elements
USRE33757E (en) * 1984-06-07 1991-12-03 Dresser Industries, Inc. Diamond drill bit with varied cutting elements
GB8418481D0 (en) * 1984-07-19 1984-08-22 Nl Petroleum Prod Rotary drill bits
GB2218131B (en) * 1988-05-06 1992-03-25 Reed Tool Co Improvements in or relating to rotary drill bits
CA1333282C (en) * 1989-02-21 1994-11-29 J. Ford Brett Imbalance compensated drill bit
US4932484A (en) * 1989-04-10 1990-06-12 Amoco Corporation Whirl resistant bit
USRE34435E (en) * 1989-04-10 1993-11-09 Amoco Corporation Whirl resistant bit
US5033560A (en) * 1990-07-24 1991-07-23 Dresser Industries, Inc. Drill bit with decreasing diameter cutters
GB2252574B (en) * 1991-02-01 1995-01-18 Reed Tool Co Rotary drill bits and methods of designing such drill bits
US5178222A (en) * 1991-07-11 1993-01-12 Baker Hughes Incorporated Drill bit having enhanced stability
US5244039A (en) * 1991-10-31 1993-09-14 Camco Drilling Group Ltd. Rotary drill bits
US5186268A (en) * 1991-10-31 1993-02-16 Camco Drilling Group Ltd. Rotary drill bits
US5265685A (en) * 1991-12-30 1993-11-30 Dresser Industries, Inc. Drill bit with improved insert cutter pattern
US5314033A (en) * 1992-02-18 1994-05-24 Baker Hughes Incorporated Drill bit having combined positive and negative or neutral rake cutters
US5238075A (en) * 1992-06-19 1993-08-24 Dresser Industries, Inc. Drill bit with improved cutter sizing pattern

Also Published As

Publication number Publication date
GB2292163A (en) 1996-02-14
CA2155392C (en) 1998-06-23
GB2292163B (en) 1998-07-15
GB9516253D0 (en) 1995-10-11
US5549171A (en) 1996-08-27

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