US20050109546A1 - Flat and bevel chipbreaker insert - Google Patents
Flat and bevel chipbreaker insert Download PDFInfo
- 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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- 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
Links
- 238000005520 cutting process Methods 0.000 claims abstract description 122
- 229910052751 metal Inorganic materials 0.000 claims abstract description 38
- 239000002184 metal Substances 0.000 claims abstract description 38
- 239000007787 solid Substances 0.000 claims description 5
- 239000003129 oil well Substances 0.000 claims 1
- 230000000630 rising effect Effects 0.000 abstract 1
- 238000005553 drilling Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000007514 turning Methods 0.000 description 2
- 230000001934 delay Effects 0.000 description 1
- 239000000463 material 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 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
- E21B10/56—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 .
Abstract
A cutting insert for use on a metal cutting tool downhole in an oil or gas well, with at least one land on a leading edge of the insert, and at least one bevel surface angled relative to the axis of the insert and rising above the adjacent land in the direction of travel of the insert. Multiple bevels and lands can be used on each insert, and multiple inserts can be used on each tool.
Description
- This application claims the benefit of U.S. Provisional Patent Application No. 60/525,577, filed on Nov. 26, 2003, and entitled “Flat and Bevel Chipbreaker Insert.”
- Not Applicable
- 1. Field of the Invention
- 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.
- 2. Background Art
- In the drilling, completion, or re-work of an oil or gas well, it often becomes necessary to cut into or through a metal object which is located downhole in the well bore. This can be required, for instance, in cutting through the wall of a well casing, removing a packer, or milling away some other metal obstruction which may be present in the borehole. This type of cutting or milling operation is very different from the type of metal cutting operations typically found in a machine shop environment. The downhole metal cutting operation involves the rotation of a very large tool by a very heavy workstring, by comparison with the typical machine shop operation. The downhole cutting operation itself involves a great deal of vibration and even severe impact, between the cutting tool and the metal object being cut. In fact, much of the force of any such impact or vibration is typically brought to bear directly on the cutting insert or 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. By contrast, 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. As a result, as the cutting operation continues, the cutting insert on the face of the cutting tool usually wears away and disintegrates. It is common, in fact, to have multiple cutting inserts on a downhole cutting tool, with the inserts being arranged progressively across the cutting face of the tool. This is done so that, as each cutting insert wears away and disintegrates or falls off the tool, another adjacent cutting insert establishes contact with the work piece, thereby continuing the cutting action. This alleviates the need to pull the work string and replace the tool, or at least delays the necessity of replacing the tool.
- An unfortunate aspect of this situation is that 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.
- It is also known to provide a chip breaking feature on the forward face of a cutting insert for use in the downhole environment, which 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. So, as wear progresses across the insert face, through the chip breaking feature, the insert might cease to break off short chips and begin to produce long, thin metal turnings. The long thin turnings are not easily removed from the well bore by the flow of fluid, so this type of insert wear can lead to the clogging of the area around the cutting tool, preventing further penetration of the work piece. Further, if 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.
- It is desirable to have, therefore, 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.
- The novel features of this invention, as well as the invention itself, will be best understood from the attached drawings, taken along with the following description, in which similar reference characters refer to similar parts, and in which:
-
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 inFIG. 2 orFIG. 3 ; and -
FIG. 7 is a partial axial section view of a fifth embodiment of a cutting insert according to the present invention. - As illustrated in
FIG. 1 , a cutting insert according to the present invention can be mounted on acutting tool 10 designed for use in cutting metal objects downhole, in an oil or gas well. Thecutting tool 10 can be a pilot mill, junk mill, casing cutter, window mill, or any other type of downhole cutting tool. Thecutting tool 10 has atool body 12, which is adapted to mount to a work string WS. Thetool body 12 has at least one cutting feature, such as theblades 14, attached thereto or formed thereon. Each cutting feature orblade 14 has at least one cutting insert 20 mounted on acutting face 16 thereof, and oriented to face in thedirection 18 in which theblades 14 and thecutting inserts 20 will advance when thecutting tool 10 is rotated. Advancement in thedirection 18 will cause thecutting 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, 20A and 20B 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 20A, oriented in the drawing the same as the orientation of thecutting inserts 20 on theright hand blade 14 inFIG. 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 20A has at least oneland 22A and at least one bevel orbeveled surface 24A, with afirst land 22A being located immediately next to the original leadingedge 28A of the cutting insert 20A. Where present,successive lands 22A andbevels 24A are alternatingly arranged from the leadingedge 28A toward the axis A of the cutting insert 20A. The cutting insert 20A is shown with threelands 22A and threebevels 24A, but it can have any number of each. The cutting insert 20A can also have asurface 26A substantially orthogonal to the axis A, on the front face of the insert 20A. - As illustrated in
FIG. 3 , thecutting insert 20 can also have a rectilinear shaped body, such as the insert 20B. The cutting insert 20B is shown oriented in the drawing the same as the orientation of thecutting inserts 20 on theright hand blade 14 inFIG. 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 20B has at least oneland 22B and at least one bevel or beveled surface 24B, with afirst land 22B being located immediately next to the original leading edge 28B of the cutting insert 20B. Where present,successive lands 22B and bevels 24B are alternatingly arranged from the leading edge 28B toward the axis of the cutting insert 20B. The cutting insert 20B is shown with threelands 22B and three bevels 24B, but it can have any number of each. The cutting insert 20B can also have a surface 26B substantially orthogonal to the axis, on the front face of the insert 20B. -
FIG. 4 shows the most basic illustration of the features of thelands 22 and bevels 24 on theinserts 20 shown inFIGS. 2 and 3 , or on anyinsert 20 according to the present invention. Theinsert 20 has a solid body. Eachland 22 is a substantially flat surface which is substantially orthogonal to the axis of the cuttinginsert 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 20A shown inFIG. 2 , theland 22A would be a substantially planar, annular, surface, substantially or nearly orthogonal to the axis of the cutting insert 20A. It can further be seen that, on the rectilinear insert 20B shown inFIG. 3 , theland 22B would be a substantially planar, rectangular or otherwise rectilinear, surface, substantially or nearly orthogonal to the axis of the cutting insert 20B. - Each
bevel 24 is angled forward, or in thedirection 18 of rotation, above or forward of the outwardlyadjacent land 22 by adistance 32, at anangle 34 from a plane orthogonal to the axis of the cuttinginsert 20. Theangle 34 can be between approximately 20 degrees and approximately 70 degrees, with a preferred angle of approximately 45 degrees. Put another way, thebevel 24 is also angled relative to the axis of the cuttinginsert 20, by an angle between approximately 20 degrees and approximately 70 degrees, with a preferred angle of approximately 45 degrees. A representative raiseddistance 32 could be on the order of approximately 0.015 inch. It can be seen that, on the round insert 20A shown inFIG. 2 , thebevel 24A would be a substantially frusto-conical surface, angled relative to the axis of the cutting insert 20A. It can further be seen that, on the rectilinear insert 20B shown inFIG. 3 , the bevel 24B would be a substantially planar, rectangular or otherwise rectilinear, surface, angled relative to the axis of the cutting insert 20B. The cuttinginsert 20 can also have arelief angle 36 between approximately 3 degrees and approximately 9 degrees, which promotes the cutting action of theedge 28 into the work piece. Arear face 40 is provided for mounting the cuttinginsert 20 on the cutting feature orblade 14 of thecutting tool 10. - The
distance 32 by which each bevel 24 rises above its outwardlyadjacent land 22 terminates thebevel 24 either in thesurface 26 or in an inwardlyadjacent land 22, as shown inFIG. 5 , in which the cuttinginsert 20 has twolands 22 and twobevels 24. This embodiment has been found to be somewhat more robust in resisting impact than the single land, single bevel embodiment shown inFIG. 4 . As shown inFIG. 6 , the cuttinginsert 20 can have three sets oflands 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. As shown inFIG. 7 , the cuttinginsert 20 can also have other features on its leadingface 26, such as adepression 38. - While the particular invention as herein shown and disclosed in detail is fully capable of obtaining the objects and providing the advantages hereinbefore stated, it is to be understood that this disclosure is merely illustrative of the presently preferred embodiments of the invention and that no limitations are intended other than as described in the appended claims.
Claims (19)
1. A metal cutting insert for use on a downhole tool in an oil or gas well, said insert comprising:
a solid body, said body having an axis;
a rear face on said body, for mounting said body to a downhole type metal cutting tool;
a front face on said body, opposite said rear face, for presentation to a downhole metal object to be cut;
a plurality of lands formed on said front face of said body, each said land being substantially orthogonal to said axis of said body; and
a plurality of bevels formed on said front face of said body, each said bevel being angled relative to said axis of said body, forward of an adjacent said land.
2. The metal cutting insert recited in claim 1 , wherein each said land is angled no less than 75 degrees relative to said axis of said body.
3. The metal cutting insert recited in claim 1 , wherein each said bevel is angled between 20 degrees and 70 degrees relative to said axis of said body.
4. The metal cutting insert recited in claim 1 , wherein a first said land is formed at an edge of said front face.
5. The metal cutting insert recited in claim 4 , wherein a first said bevel is formed adjacent to said first land.
6. The metal cutting insert recited in claim 5 , wherein said plurality of lands and said plurality of bevels are formed at alternating locations across said front face.
7. The metal cutting insert recited in claim 1 , wherein:
each said land is a substantially planar rectilinear surface; and
each said bevel is a substantially planar rectilinear surface.
8. The metal cutting insert recited in claim 7 , wherein said insert body is a substantially rectilinear solid.
9. The metal cutting insert recited in claim 1 , wherein:
each said land is a substantially planar annular surface; and
each said bevel is a substantially frusto-conical surface.
10. The metal cutting insert recited in claim 9 , wherein said insert body is substantially cylindrical.
11. A downhole metal cutting tool for gas or oil wells, comprising:
a tool body adapted for lowering into an oil or gas well to rotatingly cut a downhole metal object;
at least one metal cutting insert for mounting on said downhole tool body, said at least one insert having a solid body with an axis;
a front face on said at least one insert body, for presentation to said downhole metal object;
at least one land formed on said front face of said at least one insert body, said at least one land being substantially orthogonal to said axis of said at least one insert body; and
at least one bevel formed on said front face of said at least one insert body, said at least one bevel being angled above said at least one land, relative to said axis of said at least one insert body.
12. The downhole metal cutting tool recited in claim 11 , further comprising:
a plurality of said lands; and
a plurality of said bevels;
wherein said plurality of lands and said plurality of bevels are formed at alternating locations across said front face of said at least one insert body.
13. The downhole metal cutting tool recited in claim 12 , wherein:
a first said land is formed at an edge of said front face of said at least one insert body; and
a first said bevel is formed adjacent to said first land.
14. The downhole metal cutting tool recited in claim 12 , wherein each said land is angled no less than 75 degrees relative to said axis of said at least one insert body.
15. The downhole metal cutting tool recited in claim 12 , wherein each said bevel is angled between 20 degrees and 70 degrees relative to said axis of said at least one insert body.
16. The downhole metal cutting tool recited in claim 12 , wherein:
each said land is a substantially planar rectilinear surface; and
each said bevel is a substantially planar rectilinear surface.
17. The downhole metal cutting tool recited in claim 16 , wherein said insert body is a substantially rectilinear solid.
18. The downhole metal cutting tool recited in claim 12 , wherein:
each said land is a substantially planar annular surface; and
each said bevel is a substantially frusto-conical surface.
19. The downhole metal cutting tool recited in claim 18 , wherein said insert body is substantially cylindrical.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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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 |
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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 |
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US20050109546A1 true US20050109546A1 (en) | 2005-05-26 |
Family
ID=34652358
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US10/954,106 Abandoned US20050109546A1 (en) | 2003-11-26 | 2004-09-28 | Flat and bevel chipbreaker insert |
Country Status (8)
Country | Link |
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US (1) | US20050109546A1 (en) |
CN (1) | CN1946916A (en) |
AU (1) | AU2004295689A1 (en) |
CA (1) | CA2546938A1 (en) |
GB (1) | GB2424019B (en) |
NO (1) | NO20062558L (en) |
RU (1) | RU2006122639A (en) |
WO (1) | WO2005054621A1 (en) |
Cited By (7)
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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 (en) * | 2014-06-25 | 2016-01-27 | 普拉德研究及开发股份有限公司 | Cutting insert for initiating a cutout |
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 |
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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 |
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-
2004
- 2004-09-28 US US10/954,106 patent/US20050109546A1/en not_active Abandoned
- 2004-11-18 GB GB0611242A patent/GB2424019B/en not_active Expired - Fee Related
- 2004-11-18 CN CNA2004800397078A patent/CN1946916A/en active Pending
- 2004-11-18 RU RU2006122639/03A patent/RU2006122639A/en not_active Application Discontinuation
- 2004-11-18 CA CA002546938A patent/CA2546938A1/en not_active Abandoned
- 2004-11-18 WO PCT/US2004/038712 patent/WO2005054621A1/en active Application Filing
- 2004-11-18 AU AU2004295689A patent/AU2004295689A1/en not_active Abandoned
-
2006
- 2006-06-02 NO NO20062558A patent/NO20062558L/en not_active Application Discontinuation
Patent Citations (5)
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)
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 (en) * | 2014-06-25 | 2016-01-27 | 普拉德研究及开发股份有限公司 | Cutting insert for initiating a cutout |
US10260302B2 (en) | 2014-06-25 | 2019-04-16 | Schlumberger Technology Corporation | Cutting insert for initiating a cutout |
Also Published As
Publication number | Publication date |
---|---|
GB2424019A (en) | 2006-09-13 |
RU2006122639A (en) | 2008-01-10 |
WO2005054621A1 (en) | 2005-06-16 |
NO20062558L (en) | 2006-08-02 |
CA2546938A1 (en) | 2005-06-16 |
GB0611242D0 (en) | 2006-07-19 |
CN1946916A (en) | 2007-04-11 |
GB2424019B (en) | 2008-05-28 |
AU2004295689A1 (en) | 2005-06-16 |
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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 |