US20050109546A1 - Flat and bevel chipbreaker insert - Google Patents

Flat and bevel chipbreaker insert Download PDF

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Publication number
US20050109546A1
US20050109546A1 US10/954,106 US95410604A US2005109546A1 US 20050109546 A1 US20050109546 A1 US 20050109546A1 US 95410604 A US95410604 A US 95410604A US 2005109546 A1 US2005109546 A1 US 2005109546A1
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US
United States
Prior art keywords
insert
metal cutting
land
downhole
recited
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.)
Abandoned
Application number
US10/954,106
Other languages
English (en)
Inventor
Calvin Stowe
Daniel Hart
Francine Bradford
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.)
Baker Hughes Holdings LLC
Original Assignee
Baker Hughes 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
Application filed by Baker Hughes Inc filed Critical Baker Hughes Inc
Priority to US10/954,106 priority Critical patent/US20050109546A1/en
Assigned to BAKER HUGHES INCORPORATED reassignment BAKER HUGHES INCORPORATED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HART, DANIEL R., BRADFORD, FRANCINE A., STOWE, CALVIN J.
Publication of US20050109546A1 publication Critical patent/US20050109546A1/en
Abandoned 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
    • E21B10/46—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 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
    • E21B10/46—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

Definitions

  • This invention is in the field of tools used downhole, in oil or gas wells, to mill or otherwise cut metal objects in the borehole.
  • cutting inserts which are mounted on the cutting face of the downhole cutting tool.
  • These cutting inserts are essentially the “teeth” of the cutting tool. They are typically made of a very hard material, such as tungsten carbide.
  • the operator can not closely observe the downhole cutting operation and monitor the condition of the cutting insert or inserts.
  • the machine shop operator can closely observe the cutting operation as it progresses, and he can change the cutting insert regularly as its cutting surfaces degrade. Stopping the operation in the machine shop is typically significantly cheaper than pulling a downhole tool from the well bore and checking or changing the tool out. This means that the typical machine shop operation is always done with a basically fresh cutting insert in good condition.
  • the downhole operator on the other hand, must simply rotate the workstring and rely upon fairly remote indicators of the performance of the tool, such as vibration and rate of penetration, to judge the progress of the cutting operation.
  • the cutting insert on the face of the cutting tool usually wears away and disintegrates.
  • each cutting insert must remain effective in spite of having its original cutting geometry drastically changed as the cutting operation progresses; that is, the insert will not retain its original cutting edge for very long. If the cutting insert wears to such an extent that the cutting edge is gone, the portion of the insert contacting the work piece can act as a bearing surface. If the cutting insert can not cut effectively after having its original cutting edge worn away, the insert will not be an effective part of the tool, and it can even impede the action of nearby cutting inserts, by acting as a bearing surface, rather than as a cutting surface.
  • the chip breaking feature contributes in any way to the fragility of the insert body, it can cause the insert to disintegrate prematurely and fall off the cutting tool, resulting in a complete loss of the ability to cut, until the tool body wears sufficiently to allow the adjacent cutting insert to come into play.
  • a cutting insert which is sufficiently robust to withstand the impacts experienced in the downhole environment, and which is designed to break off short metal chips from the work piece, and to continue to present an effective cutting geometry to the work piece, even as the original cutting geometry of the insert gradually wears away.
  • the present invention in summary, is a downhole cutting insert which has one or more lands on its cutting face, interspersed with one or more beveled surfaces, creating a robust cutting face on the insert.
  • the juxtaposition of bevels with lands causes the insert to break off metal chips from the work piece at short lengths, allowing the chips to be more easily removed from the well bore by the flow of drilling fluid.
  • Use of alternating multiple bevels and lands allows the insert to continue to effectively form short metal chips, even as the forward face and the edge of the insert gradually degrade.
  • FIG. 1 is an elevation view of a downhole cutting tool which can incorporate a cutting insert according to the present invention
  • FIG. 2 is a top or front elevation view of a first embodiment of a cutting insert according to the present invention
  • FIG. 3 is a top or front elevation view of a second embodiment of a cutting insert according to the present invention.
  • FIG. 4 is a partial axial section view of a third embodiment of a cutting insert according to the present invention.
  • FIG. 5 is a partial axial section view of a fourth embodiment of a cutting insert according to the present invention.
  • FIG. 6 is a partial axial section view of the cutting insert shown in FIG. 2 or FIG. 3 ;
  • FIG. 7 is a partial axial section view of a fifth embodiment of a cutting insert according to the present invention.
  • a cutting insert according to the present invention can be mounted on a cutting tool 10 designed for use in cutting metal objects downhole, in an oil or gas well.
  • the cutting tool 10 can be a pilot mill, junk mill, casing cutter, window mill, or any other type of downhole cutting tool.
  • the cutting tool 10 has a tool body 12 , which is adapted to mount to a work string WS.
  • the tool body 12 has at least one cutting feature, such as the blades 14 , attached thereto or formed thereon.
  • Each cutting feature or blade 14 has at least one cutting insert 20 mounted on a cutting face 16 thereof, and oriented to face in the direction 18 in which the blades 14 and the cutting inserts 20 will advance when the cutting tool 10 is rotated. Advancement in the direction 18 will cause the cutting inserts 20 to advance toward and into the downhole metal object or work piece (not shown).
  • the cutting inserts 20 can take various shapes, some of which will be designated as 20 , 20 A and 20 B in the Figures discussed below. Other shapes can also be used without departing from the spirit of the present invention, as long as they exhibit the features described below.
  • FIG. 2 shows the forward or front elevation of a round or cylindrical cutting insert 20 A, oriented in the drawing the same as the orientation of the cutting inserts 20 on the right hand blade 14 in FIG. 1 . Where a round or cylindrical insert is discussed herein, it should be understood that a half-round or otherwise partially round insert can also be intended, where the context allows.
  • the cutting insert 20 A has at least one land 22 A and at least one bevel or beveled surface 24 A, with a first land 22 A being located immediately next to the original leading edge 28 A of the cutting insert 20 A. Where present, successive lands 22 A and bevels 24 A are alternatingly arranged from the leading edge 28 A toward the axis A of the cutting insert 20 A.
  • the cutting insert 20 A is shown with three lands 22 A and three bevels 24 A, but it can have any number of each.
  • the cutting insert 20 A can also have a surface 26 A substantially orthogonal to the axis A, on the front face of the insert 20 A.
  • the cutting insert 20 can also have a rectilinear shaped body, such as the insert 20 B.
  • the cutting insert 20 B is shown oriented in the drawing the same as the orientation of the cutting inserts 20 on the right hand blade 14 in FIG. 1 . Where a rectilinear insert is discussed herein, it should be understood that a square or otherwise rectangular insert can be intended.
  • the cutting insert 20 B has at least one land 22 B and at least one bevel or beveled surface 24 B, with a first land 22 B being located immediately next to the original leading edge 28 B of the cutting insert 20 B. Where present, successive lands 22 B and bevels 24 B are alternatingly arranged from the leading edge 28 B toward the axis of the cutting insert 20 B.
  • the cutting insert 20 B is shown with three lands 22 B and three bevels 24 B, but it can have any number of each.
  • the cutting insert 20 B can also have a surface 26 B substantially orthogonal to the axis, on the front face of the insert 20 B.
  • FIG. 4 shows the most basic illustration of the features of the lands 22 and bevels 24 on the inserts 20 shown in FIGS. 2 and 3 , or on any insert 20 according to the present invention.
  • the insert 20 has a solid body.
  • Each land 22 is a substantially flat surface which is substantially orthogonal to the axis of the cutting insert 20 .
  • Each land can be, more specifically, angled between approximately 75 degrees and approximately 90 degrees relative to the insert axis. It can be seen that, on the round insert 20 A shown in FIG. 2 , the land 22 A would be a substantially planar, annular, surface, substantially or nearly orthogonal to the axis of the cutting insert 20 A. It can further be seen that, on the rectilinear insert 20 B shown in FIG. 3 , the land 22 B would be a substantially planar, rectangular or otherwise rectilinear, surface, substantially or nearly orthogonal to the axis of the cutting insert 20 B.
  • Each bevel 24 is angled forward, or in the direction 18 of rotation, above or forward of the outwardly adjacent land 22 by a distance 32 , at an angle 34 from a plane orthogonal to the axis of the cutting insert 20 .
  • the angle 34 can be between approximately 20 degrees and approximately 70 degrees, with a preferred angle of approximately 45 degrees.
  • the bevel 24 is also angled relative to the axis of the cutting insert 20 , by an angle between approximately 20 degrees and approximately 70 degrees, with a preferred angle of approximately 45 degrees.
  • a representative raised distance 32 could be on the order of approximately 0.015 inch. It can be seen that, on the round insert 20 A shown in FIG.
  • the bevel 24 A would be a substantially frusto-conical surface, angled relative to the axis of the cutting insert 20 A. It can further be seen that, on the rectilinear insert 20 B shown in FIG. 3 , the bevel 24 B would be a substantially planar, rectangular or otherwise rectilinear, surface, angled relative to the axis of the cutting insert 20 B.
  • the cutting insert 20 can also have a relief angle 36 between approximately 3 degrees and approximately 9 degrees, which promotes the cutting action of the edge 28 into the work piece.
  • a rear face 40 is provided for mounting the cutting insert 20 on the cutting feature or blade 14 of the cutting tool 10 .
  • each bevel 24 rises above its outwardly adjacent land 22 terminates the bevel 24 either in the surface 26 or in an inwardly adjacent land 22 , as shown in FIG. 5 , in which the cutting insert 20 has two lands 22 and two bevels 24 .
  • This embodiment has been found to be somewhat more robust in resisting impact than the single land, single bevel embodiment shown in FIG. 4 .
  • the cutting insert 20 can have three sets of lands 22 and bevels 24 , or even more. Each land can be relatively narrow, for example, in the range of approximately 0.004 inch to approximately 0.060 inch.
  • the cutting insert 20 can also have other features on its leading face 26 , such as a depression 38 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Milling Processes (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Earth Drilling (AREA)
  • Drilling Tools (AREA)
US10/954,106 2003-11-26 2004-09-28 Flat and bevel chipbreaker insert Abandoned US20050109546A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/954,106 US20050109546A1 (en) 2003-11-26 2004-09-28 Flat and bevel chipbreaker insert

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US52557703P 2003-11-26 2003-11-26
US10/954,106 US20050109546A1 (en) 2003-11-26 2004-09-28 Flat and bevel chipbreaker insert

Publications (1)

Publication Number Publication Date
US20050109546A1 true US20050109546A1 (en) 2005-05-26

Family

ID=34652358

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/954,106 Abandoned US20050109546A1 (en) 2003-11-26 2004-09-28 Flat and bevel chipbreaker insert

Country Status (8)

Country Link
US (1) US20050109546A1 (no)
CN (1) CN1946916A (no)
AU (1) AU2004295689A1 (no)
CA (1) CA2546938A1 (no)
GB (1) GB2424019B (no)
NO (1) NO20062558L (no)
RU (1) RU2006122639A (no)
WO (1) WO2005054621A1 (no)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110031035A1 (en) * 2009-08-07 2011-02-10 Stowe Ii Calvin J Cutter and Cutting Tool Incorporating the Same
US8327957B2 (en) 2010-06-24 2012-12-11 Baker Hughes Incorporated Downhole cutting tool having center beveled mill blade
US8434572B2 (en) 2010-06-24 2013-05-07 Baker Hughes Incorporated Cutting elements for downhole cutting tools
US8936109B2 (en) 2010-06-24 2015-01-20 Baker Hughes Incorporated Cutting elements for cutting tools
US9151120B2 (en) 2012-06-04 2015-10-06 Baker Hughes Incorporated Face stabilized downhole cutting tool
CN105269047A (zh) * 2014-06-25 2016-01-27 普拉德研究及开发股份有限公司 用于启始切口的切削刀片
US9290999B2 (en) 2009-10-05 2016-03-22 Atlas Copco Secoroc Ab Hard metal insert for a drill bit for percussion drilling and method for grinding a hard metal insert

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4259033A (en) * 1974-11-29 1981-03-31 Kennametal Inc. Cutting insert
US5984005A (en) * 1995-09-22 1999-11-16 Weatherford/Lamb, Inc. Wellbore milling inserts and mills
US6065554A (en) * 1996-10-11 2000-05-23 Camco Drilling Group Limited Preform cutting elements for rotary drill bits
US6527069B1 (en) * 1998-06-25 2003-03-04 Baker Hughes Incorporated Superabrasive cutter having optimized table thickness and arcuate table-to-substrate interfaces
US6672406B2 (en) * 1997-09-08 2004-01-06 Baker Hughes Incorporated Multi-aggressiveness cuttting face on PDC cutters and method of drilling subterranean formations

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5706906A (en) * 1996-02-15 1998-01-13 Baker Hughes Incorporated Superabrasive cutting element with enhanced durability and increased wear life, and apparatus so equipped

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4259033A (en) * 1974-11-29 1981-03-31 Kennametal Inc. Cutting insert
US5984005A (en) * 1995-09-22 1999-11-16 Weatherford/Lamb, Inc. Wellbore milling inserts and mills
US6065554A (en) * 1996-10-11 2000-05-23 Camco Drilling Group Limited Preform cutting elements for 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
US6527069B1 (en) * 1998-06-25 2003-03-04 Baker Hughes Incorporated Superabrasive cutter having optimized table thickness and arcuate table-to-substrate interfaces

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110031035A1 (en) * 2009-08-07 2011-02-10 Stowe Ii Calvin J Cutter and Cutting Tool Incorporating the Same
US8689911B2 (en) 2009-08-07 2014-04-08 Baker Hughes Incorporated Cutter and cutting tool incorporating the same
US9290999B2 (en) 2009-10-05 2016-03-22 Atlas Copco Secoroc Ab Hard metal insert for a drill bit for percussion drilling and method for grinding a hard metal insert
US8327957B2 (en) 2010-06-24 2012-12-11 Baker Hughes Incorporated Downhole cutting tool having center beveled mill blade
US8434572B2 (en) 2010-06-24 2013-05-07 Baker Hughes Incorporated Cutting elements for downhole cutting tools
US8936109B2 (en) 2010-06-24 2015-01-20 Baker Hughes Incorporated Cutting elements for cutting tools
US9151120B2 (en) 2012-06-04 2015-10-06 Baker Hughes Incorporated Face stabilized downhole cutting tool
CN105269047A (zh) * 2014-06-25 2016-01-27 普拉德研究及开发股份有限公司 用于启始切口的切削刀片
US10260302B2 (en) 2014-06-25 2019-04-16 Schlumberger Technology Corporation Cutting insert for initiating a cutout

Also Published As

Publication number Publication date
RU2006122639A (ru) 2008-01-10
GB2424019A (en) 2006-09-13
WO2005054621A1 (en) 2005-06-16
CN1946916A (zh) 2007-04-11
AU2004295689A1 (en) 2005-06-16
CA2546938A1 (en) 2005-06-16
GB0611242D0 (en) 2006-07-19
NO20062558L (no) 2006-08-02
GB2424019B (en) 2008-05-28

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Legal Events

Date Code Title Description
AS Assignment

Owner name: BAKER HUGHES INCORPORATED, TEXAS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:STOWE, CALVIN J.;HART, DANIEL R.;BRADFORD, FRANCINE A.;REEL/FRAME:015852/0630;SIGNING DATES FROM 20040922 TO 20040923

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION