US3749190A - Retaining carbide in rock drill bits - Google Patents
Retaining carbide in rock drill bits Download PDFInfo
- Publication number
- US3749190A US3749190A US00140793A US3749190DA US3749190A US 3749190 A US3749190 A US 3749190A US 00140793 A US00140793 A US 00140793A US 3749190D A US3749190D A US 3749190DA US 3749190 A US3749190 A US 3749190A
- Authority
- US
- United States
- Prior art keywords
- hole
- sleeve
- insert
- button
- undercut
- 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
- 239000011435 rock Substances 0.000 title claims abstract description 12
- 238000001125 extrusion Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 2
- 230000000717 retained effect Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 238000010008 shearing Methods 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
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/56—Button-type inserts
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49945—Assembling or joining by driven force fit
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T403/00—Joints and connections
- Y10T403/49—Member deformed in situ
- Y10T403/4916—Interposed deforming element contacts socket bottom
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T403/00—Joints and connections
- Y10T403/49—Member deformed in situ
- Y10T403/4966—Deformation occurs simultaneously with assembly
Definitions
- a sleeve may be wedged into the space between the button of the hole with sufficient force to extrude the sleeve material into the undercut.
- the sleeve thus retains the carbide button in the drill bit by its wedging action and by interlocking with the undercut in the drill bit.
- the drill bit may be further strengthened by heat treating after the hole and undercut are machined and prior to insertion of the carbide button. The button cannot be extracted from its hole without removing the wedge sleeve, and the wedge sleeve cannot be removed without shearing across the generatrix of the undercut.
- FIG. 1 is a perspective view of a rock drill bit with carbide inserts
- FIG. 2 is a sectional view of the carbide button inserted in a drill bit
- FIG. 3 is a similar view with the sleeve extruded into the undercut.
- a drill bit has a plurality of tapered carbide buttons 12 projecting from the working face 14 of the bit.
- the carbide button is positioned in a straight hole 16 which has an undercut 18.
- the large end of the button 20 abuts the bottom of the hole 22 and a sleeve 24 is wedged between the tapered side 26 and the hole 16.
- FIG. 3 shows how the sleeve 24 has been pressed further into the hole with sufficient force to wedge it between the tapered side 26 of the button I2 and the straight side of the hole 16, and, more importantly, sufficient to extrude part of the sleeve into the undercut I8.
- the sleeve may have a uniform wall thickness or a tapered wall.
- the button In operation, when extractive forces are imposed on the carbide sides 26, the button will be retained in the hole until these forces exceed the shear strength of the sleeve across the shear line that spans the upper intersection 28 of the undercut with the straight hole wall 16 and the lower intersection 30 of the undercut with the hole wall. The larger the shear area, the greater will be the retaining strength of the sleeve.
- the use of a hardenable steel for the bit body 10 permits easy machining of hole 16 and undercut l8, and heat treatment for maximum strength to resist deformation near the hole by the extractive forces on the button.
- a rock drill bit comprising:
- a sleeve wedgingly retaining the carbide insert in said one hole; wherein said insert is circular in cross-section, and has a uniformly-diminishing diameter along a length thereof which is defined by the portion of said insert which is set in said one hole, said portion defining only a uniformly-diminishing cylindrical surface; said sleeve comprises an annulus which envelops substantially all of said portion of said insert, and which is compressed along the full length thereof, between said uniformly-diminishing cylindrical surface of said insert and the wall of said one hole, to secure said insert with a forceful constraint, about the full circumference thereof and along a substantial length of said portion thereof, in said one hole;
- said one hole has an annular undercut formed in said wall a substantial distance from the bottom of said one hole;
- said sleeve has an annular extrusion formed thereon which is compressively nested in said undercut;
- said extrusion and undercut are cooperative with said circumferential constraint of said insert by said sleeve and said lengthwise constraint of a substantial length of said portion of said insert by said sleeve to secure said insert in said one hole.
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)
Abstract
A rock drill bit having tapered carbide buttons projecting from its working face is described in which the buttons are retained in the bit by means of sleeves which are extruded into undercuts of the button holes and retain the carbide buttons in the drill bit by vitue of the shear strength of the sleeves.
Description
United States Patent 1 Shipman [451 July 31, 1973 Inventor:
RETAINING CARBIDE IN ROCK DRILL BITS Clarence S. Shipman, Easton, Pa.
llngersoll-Rand Company, New York, NY.
Filed: May 6, 1971 Appl. No.: 140,793
Assignee:
U.S. Cl 175/410, 29/525, 175/374,
Int. Cl. E21c 13/02, E21c 13/06 Field of Search 175/329, 374, 410; 29/509, 512, 522, 525; 76/101 A, 108 A; 85/70, 77, 82; 287/203; 299/91; 285/3824, 382.5, DIG. 9
Reierences Cited UNITED STATES PATENTS 11/1951 Alexander et al. 175/410 FOREIGN PATENTS OR APPLICATIONS 642,770 9/1950 Great Britain 85/77 Primary Examiner-Marvin A. Champion Assistant Examiner-Jack E. Ebel Attorney-Frank S, Troidl and David W. Tibbott 2 Claims, 3 Drawing Figures PATENIEB JUL 31 I975 INVENTOR CLARENCE 5 SHIP/14A IV BY QM ATTORNEY RETAINING CARBIDE IN ROCK DRILL BITS This invention relates to rock drill bits, and in particular, to a rock drill bit having tapered carbide button inserts.
Conventional rock drill bits with carbide inserts are exposed to severe impact forces in operation which tend to extract the carbide buttons from the bits rendering the bits ineffective. Because the buttons are usually inserted by press-fit or shrink-fit into holes in the bit face that are machined to close tolerance, the bits must be made from a material soft enough to machine. This lower hardness makes the bit body more easily deformed and requires less force to extract a carbide button from its hole. Many steels may be heat treated to increase their strength, but such heat treatment tends to distort close tolerance dimensions. My invention eliminates the need for expensive close tolerance machining of holes, and permits the use of a material hardenable to higher strength for the bit body.
I have discovered that if a straight hole is provided with an undercut and a tapered carbide button is inserted in the hole with the large end of the button seated on the bottom of the hole, a sleeve may be wedged into the space between the button of the hole with sufficient force to extrude the sleeve material into the undercut. The sleeve thus retains the carbide button in the drill bit by its wedging action and by interlocking with the undercut in the drill bit. Because close tolerances are not required, the drill bit may be further strengthened by heat treating after the hole and undercut are machined and prior to insertion of the carbide button. The button cannot be extracted from its hole without removing the wedge sleeve, and the wedge sleeve cannot be removed without shearing across the generatrix of the undercut.
The invention as well as its advantages, may be further understood by reference to the following detailed description and drawings wherein like parts are represented by like numbers throughout the various views, and in which:
FIG. 1 is a perspective view of a rock drill bit with carbide inserts;
FIG. 2 is a sectional view of the carbide button inserted in a drill bit; and
FIG. 3 is a similar view with the sleeve extruded into the undercut.
Referring to the drawings, and particularly to FIG. 1, a drill bit has a plurality of tapered carbide buttons 12 projecting from the working face 14 of the bit. In FIG. 2, it can be seen that the carbide button is positioned in a straight hole 16 which has an undercut 18. The large end of the button 20 abuts the bottom of the hole 22 and a sleeve 24 is wedged between the tapered side 26 and the hole 16. FIG. 3 shows how the sleeve 24 has been pressed further into the hole with sufficient force to wedge it between the tapered side 26 of the button I2 and the straight side of the hole 16, and, more importantly, sufficient to extrude part of the sleeve into the undercut I8. Prior to application the sleeve may have a uniform wall thickness or a tapered wall.
In operation, when extractive forces are imposed on the carbide sides 26, the button will be retained in the hole until these forces exceed the shear strength of the sleeve across the shear line that spans the upper intersection 28 of the undercut with the straight hole wall 16 and the lower intersection 30 of the undercut with the hole wall. The larger the shear area, the greater will be the retaining strength of the sleeve. The use of a hardenable steel for the bit body 10 permits easy machining of hole 16 and undercut l8, and heat treatment for maximum strength to resist deformation near the hole by the extractive forces on the button.
I claim:
1. A rock drill bit comprising:
A bit body having at least one hole formed therein:
a tapered carbide insert set in said one hole with a taper-defined larger end of said insert abutting the bottom of said one hole; and
a sleeve wedgingly retaining the carbide insert in said one hole; wherein said insert is circular in cross-section, and has a uniformly-diminishing diameter along a length thereof which is defined by the portion of said insert which is set in said one hole, said portion defining only a uniformly-diminishing cylindrical surface; said sleeve comprises an annulus which envelops substantially all of said portion of said insert, and which is compressed along the full length thereof, between said uniformly-diminishing cylindrical surface of said insert and the wall of said one hole, to secure said insert with a forceful constraint, about the full circumference thereof and along a substantial length of said portion thereof, in said one hole;
said one hole has an annular undercut formed in said wall a substantial distance from the bottom of said one hole;
said sleeve has an annular extrusion formed thereon which is compressively nested in said undercut; and
said extrusion and undercut are cooperative with said circumferential constraint of said insert by said sleeve and said lengthwise constraint of a substantial length of said portion of said insert by said sleeve to secure said insert in said one hole.
2. The method of retaining a carbide button, having an unformly-diminishing cylindrical surface, in a rock drill bit comprising:
forming a hole in the bit to receive the button;
forming an undercut in the hole a substantial distance from the bottom of said hole;
setting a tapered carbide button in the hole, with the taper-defined larger end of the button abutting the bottom of the hole, and with only said uniformlydiminishing cylindrical surface thereof within said hole;
forcing a sleeve, which has an inside diameter which is less than the outside diameter of said button, around the button; and
pressing the sleeve toward the bottom of the hole with a predetermined force, to cause part of the sleeve to extrude into the undercut, the sleeve to envelop substantially all of said uniformlydiminishing cylindrical surface, and the remainder of said sleeve to deform into an annular wedge forcefully constrained against the full circumference of said button, against and along a substantial length of said uniformly-diminishing cylindrical surface, and against the wall of the hole, retaining the button in the body.
l t I01 i i
Claims (2)
1. A rock drill bit comprising: A bit body having at least one hole formed therein: a tapered carbide insert set in said one hole with a taperdefined larger end of said insert abutting the bottom of said one hole; and a sleeve wedgingly retaining the carbide insert in said one hole; wherein said insert is circular in cross-section, and has a uniformlydiminishing diameter along a length thereof which is defined by the portion of said insert which is set in said one hole, said portion defining only a uniformly-diminishing cylindrical surface; said sleeve comprises an annulus which envelops substantially all of said portion of said insert, and which is compressed along the full length thereof, between said uniformlydiminishing cylindrical surface of said insert and the wall of said one hole, to secure said insert with a forceful constraint, about the full circumference thereof and along a substantial length of said portion thereof, in said one hole; said one hole has an annular undercut formed in said wall a substantial distance from the bottom of said one hole; said sleeve has an annular extrusion formed thereon which is compressively nested in said undercut; and said extrusion and undercut are cooperative with said circumferential constraint of said insert by said sleeve and said lengthwise constraint of a substantial length of said portion of said insert by said sleeve to secure said insert in said one hole.
2. The method of retaining a carbide button, having an unformly-diminishing cylindrical surface, in a rock drill bit comprising: forming a hole in the bit to receive the button; forming an undercut in the hole a substantial distance from the bottom of said hole; setting a tapered carbide button in the hole, with the taper-defined larger end of the button abutting the bottom of the hole, and with only said uniformly-diminishing cylindrical surface thereof within said hole; forcing a sleeve, which has an inside diameter which is less than the outside diameter of said button, around the button; and pressing the sleeve toward the bottom of the hole with a predetermined force, to cause part of the sleeve to extrude into the undercut, the sleeve to envelop substantially all of said uniformly-diminishing cylindrical surface, and the remainder of said sleeve to deform into an annular wedge forcefully constrained against the full circumference of said button, against and along a substantial length of said uniformly-diminishing cylindrical surface, and against the wall of the hole, retaining the button in the body.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14079371A | 1971-05-06 | 1971-05-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3749190A true US3749190A (en) | 1973-07-31 |
Family
ID=22492813
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00140793A Expired - Lifetime US3749190A (en) | 1971-05-06 | 1971-05-06 | Retaining carbide in rock drill bits |
Country Status (1)
Country | Link |
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US (1) | US3749190A (en) |
Cited By (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3852874A (en) * | 1972-03-02 | 1974-12-10 | Smith Williston Inc | Method of inserting buttons in a drilling head |
US3941197A (en) * | 1974-07-01 | 1976-03-02 | Hughes Tool Company | Rotary percussion earth boring bit |
US4014395A (en) * | 1974-12-05 | 1977-03-29 | Smith-Williston, Inc. | Rock drill bit insert retaining sleeve assembly |
US4069880A (en) * | 1973-05-24 | 1978-01-24 | Kennametal Inc. | Excavation tool |
FR2382576A1 (en) * | 1977-03-03 | 1978-09-29 | Sandvik Ab | CYLINDRICAL COMPONENT DRILLING TREPAN |
US4271917A (en) * | 1979-04-09 | 1981-06-09 | Syndrill Products Joint Venture | Locking device for hard metal inserts |
US4406337A (en) * | 1981-03-31 | 1983-09-27 | Hughes Tool Company | Insert with locking projection |
US4647111A (en) * | 1984-06-09 | 1987-03-03 | Belzer-Dowidat Gmbh Werkzeug-Union | Sleeve insert mounting for mining pick |
US4823893A (en) * | 1987-07-17 | 1989-04-25 | Ingersoll-Rand Company | Metal insert mounting |
US5220967A (en) * | 1991-09-23 | 1993-06-22 | Sandvik Rock Tools, Inc. | Drill and self-centering cutter insert therefor |
EP0573135A1 (en) * | 1992-05-27 | 1993-12-08 | De Beers Industrial Diamond Division (Proprietary) Limited | Abrasive tools |
EP0581534A1 (en) * | 1992-07-23 | 1994-02-02 | De Beers Industrial Diamond Division (Proprietary) Limited | Cutting insert for an abrasive tool and method of mounting |
US5324134A (en) * | 1990-04-30 | 1994-06-28 | Robert Bosch Gmbh | Positive connection of a magnetically operated valve to a housing block, and method of forming a positive connection |
US5421423A (en) * | 1994-03-22 | 1995-06-06 | Dresser Industries, Inc. | Rotary cone drill bit with improved cutter insert |
US5678645A (en) * | 1995-11-13 | 1997-10-21 | Baker Hughes Incorporated | Mechanically locked cutters and nozzles |
US5755301A (en) * | 1996-08-09 | 1998-05-26 | Dresser Industries, Inc. | Inserts and compacts with lead-in surface for enhanced retention |
US5810103A (en) * | 1996-12-03 | 1998-09-22 | Sylvan Engineering Company | Method and apparatus for mounting PCD compacts |
US6283234B1 (en) | 1999-09-17 | 2001-09-04 | Sylvan Engineering Company | Apparatus for mounting PCD compacts |
US6427791B1 (en) | 2001-01-19 | 2002-08-06 | The United States Of America As Represented By The United States Department Of Energy | Drill bit assembly for releasably retaining a drill bit cutter |
US20060186724A1 (en) * | 2005-02-18 | 2006-08-24 | Sandvik Ab | Tool holder block and sleeve retained therein by interference fit |
US20060278441A1 (en) * | 2005-06-09 | 2006-12-14 | Us Synthetic Corporation | Cutting element apparatuses and drill bits so equipped |
US20080017419A1 (en) * | 2005-10-11 | 2008-01-24 | Cooley Craig H | Cutting element apparatuses, drill bits including same, methods of cutting, and methods of rotating a cutting element |
US20080236900A1 (en) * | 2005-06-09 | 2008-10-02 | Us Synthetic Corporation | Cutting element apparatuses and drill bits so equipped |
US20090324348A1 (en) * | 2005-10-11 | 2009-12-31 | Us Synthetic Corporation | Cutting element apparatuses, drill bits including same, methods of cutting, and methods of rotating a cutting element |
US8079431B1 (en) | 2009-03-17 | 2011-12-20 | Us Synthetic Corporation | Drill bit having rotational cutting elements and method of drilling |
US20130098972A1 (en) * | 2011-09-16 | 2013-04-25 | Baker Hughes Incorporated | Methods for attaching cutting elements to earth-boring tools and resulting products |
US8567533B2 (en) | 2010-08-17 | 2013-10-29 | Dover Bmcs Acquisition Corporation | Rotational drill bits and drilling apparatuses including the same |
EP2811114A1 (en) * | 2013-06-06 | 2014-12-10 | Caterpillar Global Mining Europe GmbH | Tool support for cutting heads |
US8950516B2 (en) | 2011-11-03 | 2015-02-10 | Us Synthetic Corporation | Borehole drill bit cutter indexing |
EP2787163A4 (en) * | 2011-11-30 | 2015-12-02 | Mitsubishi Materials Corp | Excavation tool |
US9617795B2 (en) | 2012-03-09 | 2017-04-11 | Dover Bmcs Acquisition Corporation | Rotational drill bits and drilling apparatuses including the same |
CN107476766A (en) * | 2016-04-08 | 2017-12-15 | 史密斯国际有限公司 | Cutting element recess with release characteristic |
US11220868B2 (en) * | 2018-06-13 | 2022-01-11 | Schlumberger Technology Corporation | Split threads for fixing accessories to a body |
-
1971
- 1971-05-06 US US00140793A patent/US3749190A/en not_active Expired - Lifetime
Cited By (65)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3852874A (en) * | 1972-03-02 | 1974-12-10 | Smith Williston Inc | Method of inserting buttons in a drilling head |
US4069880A (en) * | 1973-05-24 | 1978-01-24 | Kennametal Inc. | Excavation tool |
US3941197A (en) * | 1974-07-01 | 1976-03-02 | Hughes Tool Company | Rotary percussion earth boring bit |
US4014395A (en) * | 1974-12-05 | 1977-03-29 | Smith-Williston, Inc. | Rock drill bit insert retaining sleeve assembly |
FR2382576A1 (en) * | 1977-03-03 | 1978-09-29 | Sandvik Ab | CYLINDRICAL COMPONENT DRILLING TREPAN |
US4271917A (en) * | 1979-04-09 | 1981-06-09 | Syndrill Products Joint Venture | Locking device for hard metal inserts |
US4406337A (en) * | 1981-03-31 | 1983-09-27 | Hughes Tool Company | Insert with locking projection |
US4647111A (en) * | 1984-06-09 | 1987-03-03 | Belzer-Dowidat Gmbh Werkzeug-Union | Sleeve insert mounting for mining pick |
US4823893A (en) * | 1987-07-17 | 1989-04-25 | Ingersoll-Rand Company | Metal insert mounting |
US5324134A (en) * | 1990-04-30 | 1994-06-28 | Robert Bosch Gmbh | Positive connection of a magnetically operated valve to a housing block, and method of forming a positive connection |
US5220967A (en) * | 1991-09-23 | 1993-06-22 | Sandvik Rock Tools, Inc. | Drill and self-centering cutter insert therefor |
EP0573135A1 (en) * | 1992-05-27 | 1993-12-08 | De Beers Industrial Diamond Division (Proprietary) Limited | Abrasive tools |
AU658045B2 (en) * | 1992-05-27 | 1995-03-30 | De Beers Industrial Diamond Division (Proprietary) Limited | Abrasive tools |
US5423719A (en) * | 1992-05-27 | 1995-06-13 | Jennings; Bernard A. | Abrasive tools |
EP0581534A1 (en) * | 1992-07-23 | 1994-02-02 | De Beers Industrial Diamond Division (Proprietary) Limited | Cutting insert for an abrasive tool and method of mounting |
US5421423A (en) * | 1994-03-22 | 1995-06-06 | Dresser Industries, Inc. | Rotary cone drill bit with improved cutter insert |
US5678645A (en) * | 1995-11-13 | 1997-10-21 | Baker Hughes Incorporated | Mechanically locked cutters and nozzles |
US5906245A (en) * | 1995-11-13 | 1999-05-25 | Baker Hughes Incorporated | Mechanically locked drill bit components |
US5755301A (en) * | 1996-08-09 | 1998-05-26 | Dresser Industries, Inc. | Inserts and compacts with lead-in surface for enhanced retention |
US5810103A (en) * | 1996-12-03 | 1998-09-22 | Sylvan Engineering Company | Method and apparatus for mounting PCD compacts |
US6283234B1 (en) | 1999-09-17 | 2001-09-04 | Sylvan Engineering Company | Apparatus for mounting PCD compacts |
US6427791B1 (en) | 2001-01-19 | 2002-08-06 | The United States Of America As Represented By The United States Department Of Energy | Drill bit assembly for releasably retaining a drill bit cutter |
US7234782B2 (en) | 2005-02-18 | 2007-06-26 | Sandvik Intellectual Property Ab | Tool holder block and sleeve retained therein by interference fit |
US20070013224A1 (en) * | 2005-02-18 | 2007-01-18 | Sandvik Intellectual Property Ab. | Tool holder block and sleeve retained therein by interference fit |
US20060186724A1 (en) * | 2005-02-18 | 2006-08-24 | Sandvik Ab | Tool holder block and sleeve retained therein by interference fit |
US7270379B2 (en) | 2005-02-18 | 2007-09-18 | Sandvik Intellectual Property Ab | Tool holder block and sleeve retained therein by interference fit |
US20060278441A1 (en) * | 2005-06-09 | 2006-12-14 | Us Synthetic Corporation | Cutting element apparatuses and drill bits so equipped |
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US20080017419A1 (en) * | 2005-10-11 | 2008-01-24 | Cooley Craig H | Cutting element apparatuses, drill bits including same, methods of cutting, and methods of rotating a cutting element |
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US8807249B2 (en) | 2010-08-17 | 2014-08-19 | Dover Bmcs Acquisition Corporation | Rotational drill bits and drilling apparatuses including the same |
US8567533B2 (en) | 2010-08-17 | 2013-10-29 | Dover Bmcs Acquisition Corporation | Rotational drill bits and drilling apparatuses including the same |
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US9617795B2 (en) | 2012-03-09 | 2017-04-11 | Dover Bmcs Acquisition Corporation | Rotational drill bits and drilling apparatuses including the same |
US10184299B1 (en) | 2012-03-09 | 2019-01-22 | Apergy Bmcs Acquisition Corporation | Rotational drill bits and drilling apparatuses including the same |
EP2811114A1 (en) * | 2013-06-06 | 2014-12-10 | Caterpillar Global Mining Europe GmbH | Tool support for cutting heads |
CN107476766A (en) * | 2016-04-08 | 2017-12-15 | 史密斯国际有限公司 | Cutting element recess with release characteristic |
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