US3751177A - Guide pad mounting on a drill bit - Google Patents

Guide pad mounting on a drill bit Download PDF

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Publication number
US3751177A
US3751177A US00091296A US3751177DA US3751177A US 3751177 A US3751177 A US 3751177A US 00091296 A US00091296 A US 00091296A US 3751177D A US3751177D A US 3751177DA US 3751177 A US3751177 A US 3751177A
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US
United States
Prior art keywords
drill
guide pad
axis
sliding bearing
pad
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
Application number
US00091296A
Inventor
K Faber
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.)
Santrade Ltd
Original Assignee
Sandvik AB
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 Sandvik AB filed Critical Sandvik AB
Application granted granted Critical
Publication of US3751177A publication Critical patent/US3751177A/en
Assigned to SANTRADE LTD., A CORP.OF SWITZERLAND reassignment SANTRADE LTD., A CORP.OF SWITZERLAND ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SANDVIK STEEL OF COLORADO, INC., A CORP. OF CO
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D77/00—Reaming tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/02—Connections between shanks and removable cutting heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/56—Guiding pads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/06—Drills with lubricating or cooling equipment
    • B23B51/063—Deep hole drills, e.g. ejector drills
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S408/00—Cutting by use of rotating axially moving tool
    • Y10S408/705—Drilling deep holes
    • 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
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/892—Tool or Tool with support with work-engaging structure detachable from cutting edge
    • 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
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/905—Having stepped cutting edges
    • Y10T408/906—Axially spaced
    • 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
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/907—Tool or Tool with support including detailed shank

Definitions

  • shape of the drill may change, for instance by elastic deformation or by diameter wear, in such a way that there is established only a partial contact between the pads and the wall of the hole. This results in an increased specific surface pressure from the pads causing undue friction.
  • the invention provides an improvement in this regard by means of a guide pad which is mounted on a pivot, so that it can rock and adapt itself to the surface of the hole, thereby securing a full surface contact.
  • FIG. 1 a side view of a drill according to the invention.
  • FIG. 2 an end view of the same drill.
  • FIG. 3 a guide pad on the same drill.
  • FIG. 4 a cross section on the line 4-4 in FIG. 3.
  • FIG. 5 a side view of another embodiment of the invention.
  • FIG. 6 an end view of the drill in FIG. 5.
  • FIG. 7 a side view of a third embodiment of the invention.
  • FIG. 8 an end view of the drill in FIG. 7.
  • the drill shown in FIGS. 1 and 2 is a metal drill having a number of cutting inserts 11 clamped in supports 13 by clamps 12 of which all except one have been omitted in FIG. 2.
  • the supports 13 are attached to the drill in a suitable way, e.g., by screws or by brazmg.
  • two guide pads 20 For supporting and guiding the drill in the hole are provided two guide pads 20, suitably of sintered carbide.
  • the pads are mounted on a pivot so that they can rock around both a longitudinal and a transverse axis.
  • the pivoting around a longitudinal axis is obtained by means of a support 21 with a cylindrical sliding surface 22, which rests on a matching surface 23 in a depression in the drill.
  • the periphery surface 25 of the support 21 is approximately flush with the periphery surface of the drill.
  • the support is fastened with a screw 26 (FIG. 1) and a resilient washer 27 permitting rocking of the support.
  • the pivot axis 24 lies outside the pad in order that when the drill rotates the friction on the pad will urge the leading edge 28 of the pad away from the edge of the hole. This lessens the friction and facilitates the entering of the lubricant between the pad and the wall.
  • the pivoting on a transverse axis is obtained by a support 30 having a cylindrical surface 31 sliding along a matching surface 32 in the support 21.
  • the pad is held by a tubular pin 34 within a bore through both supports 21 and 30.
  • the rocking requires bending of the pin. This is made possible by an annular space 35 extending along a part of the pin 34.
  • the pivot mounting around two perpendicular axii provided by the above described two cylindrical sliding joints may be obtained by a single spherical joint.
  • FIGS. 5 and 6 show a modified embodiment of the invention in which the pad unit 40 is symmetrical. It carries two sintered carbide pads 41 on each side of a fastening screw 42, under the head of which there is a helical spring 43 permitting the rocking around a longitudinal axis.
  • This embodiment comprises no rocking on a transverse axis.
  • the advantage of the symmetrical pad is that the pad can be turned half a turn when it has been worn out on the side having the greatest pressure.
  • FIGS. 7 and 8 show another symmetrical pad unit 50 having four pad inserts 51 on a drill for counterboring (reaming), i.e. for enlarging the internal diameter of holes.
  • reaming counterboring
  • the specific advantage is that the great area of the pads makes the'tool suitable for reaming the inner diameter of tubes with a thin wall that would be damaged by the pressure from smaller guide pads.
  • Drill for drilling in metal having a guide pad adapted to slide with frictional contact along the wall of the drill hole, in which the guide pad is pivotally rockable on at least one axis having the same general direction as the sliding surface of the guide pad and situated at a fixed distance from the drill axis.
  • Drill as defined in claim 1 having a guide pad on a longitudinal pivot axis, in which said axis lies outside the periphery surface of the pad.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)
  • Drilling Tools (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Earth Drilling (AREA)

Abstract

A drill has a guide pad pivotally mounted on it, on that the guide pad may adapt itself to the surface of a hole wherein the drill is being operated.

Description

United States Patent 11 1 Faber 14 1 Aug. 7, 1973 1 1 GUIDE PAD MOUNTING ()N A 01111111 BIT 1,866,082 7/1932 011115011 175/202 9 {75] Inventor: Kurt Heinrich Albert Erich Faber, Sundvikcn, Sweden 2 47:726 1953 Assigncc: Sandvik k g Sandvikcn BlShOp X Swede" FOREIGN PATENTS OR APPLICATIONS [22] Filed: Nov. 20, 1970 313,802 6/1929 Great Britain 175/325 271,839 3/1928 Great Britain.... 175/325 [211 APPl- 91,296 1,221,024 5/1960 France 175 325 66,525 9/1914 Austria..... 175/325 Foreign Application Priority Data 321,935 6/1920 Germany 175/325 N .24,1969 S 'd 16082 69 m w Ln Primary Examiner-Marv1n A. Champlon 52 us. c1 408/200 175/325 175/408 Lewis Attorney-Pierce, Scheffler & Parker [51] Int. Cl B23b.5l/00 [58] Field of Search 175/320, 325, 344-347, [57] ABSTRACT A dr111 has a gu1de pad p1vota11y mounted on it, on that [56] References Cited the guide pad may adapt itself to the surface of a hole UNITED STATES PATENTS 'wherein the drill is being operated. 2,151.646 3/1939 Subkow ct a1. 175/325 7 Claims, 8 Drawing Figures PAIENIEmuc 1 ms sum 1 or 4 7 PAIENIED AUG 71973 SHEET 3 BF 4 l I I I.
GUIDE PAD MOUNTING ON A DRILL BIT between the outer surface of the pad and the wall of the hole. Now it has been observed that the shape of the drill may change, for instance by elastic deformation or by diameter wear, in such a way that there is established only a partial contact between the pads and the wall of the hole. This results in an increased specific surface pressure from the pads causing undue friction.
The invention provides an improvement in this regard by means of a guide pad which is mounted on a pivot, so that it can rock and adapt itself to the surface of the hole, thereby securing a full surface contact.
The invention is closer described in the following specification with appended drawings, showing:
FIG. 1, a side view of a drill according to the invention.
FIG. 2, an end view of the same drill.
FIG. 3, a guide pad on the same drill.
FIG. 4, a cross section on the line 4-4 in FIG. 3.
FIG. 5, a side view of another embodiment of the invention.
FIG. 6, an end view of the drill in FIG. 5.
FIG. 7, a side view of a third embodiment of the invention.
FIG. 8, an end view of the drill in FIG. 7.
The drill shown in FIGS. 1 and 2 is a metal drill having a number of cutting inserts 11 clamped in supports 13 by clamps 12 of which all except one have been omitted in FIG. 2. The supports 13 are attached to the drill in a suitable way, e.g., by screws or by brazmg.
For supporting and guiding the drill in the hole are provided two guide pads 20, suitably of sintered carbide. The pads are mounted on a pivot so that they can rock around both a longitudinal and a transverse axis. The pivoting around a longitudinal axisis obtained by means of a support 21 witha cylindrical sliding surface 22, which rests on a matching surface 23 in a depression in the drill. The periphery surface 25 of the support 21 is approximately flush with the periphery surface of the drill. The support is fastened with a screw 26 (FIG. 1) and a resilient washer 27 permitting rocking of the support.
The pivot axis 24 lies outside the pad in order that when the drill rotates the friction on the pad will urge the leading edge 28 of the pad away from the edge of the hole. This lessens the friction and facilitates the entering of the lubricant between the pad and the wall. By a suitable position of the centre 24 the surface pressure can be properly distributed with regard to the hydrodynamic effect of the lubricant.
The pivoting on a transverse axis is obtained by a support 30 having a cylindrical surface 31 sliding along a matching surface 32 in the support 21. The pad is held by a tubular pin 34 within a bore through both supports 21 and 30. As the axis of the pin lies outside the pivot centre 33, the rocking requires bending of the pin. This is made possible by an annular space 35 extending along a part of the pin 34.
The pivot mounting around two perpendicular axii provided by the above described two cylindrical sliding joints may be obtained by a single spherical joint.
FIGS. 5 and 6 show a modified embodiment of the invention in which the pad unit 40 is symmetrical. It carries two sintered carbide pads 41 on each side of a fastening screw 42, under the head of which there is a helical spring 43 permitting the rocking around a longitudinal axis. This embodiment comprises no rocking on a transverse axis. The advantage of the symmetrical pad is that the pad can be turned half a turn when it has been worn out on the side having the greatest pressure.
FIGS. 7 and 8 show another symmetrical pad unit 50 having four pad inserts 51 on a drill for counterboring (reaming), i.e. for enlarging the internal diameter of holes. The specific advantage is that the great area of the pads makes the'tool suitable for reaming the inner diameter of tubes with a thin wall that would be damaged by the pressure from smaller guide pads.
'I claim:
1. Drill for drilling in metal having a guide pad adapted to slide with frictional contact along the wall of the drill hole, in which the guide pad is pivotally rockable on at least one axis having the same general direction as the sliding surface of the guide pad and situated at a fixed distance from the drill axis.
2. Drill as defined in claim 1, in which the guide pad is mounted on a sliding bearing with a curved sliding bearing surface.
3. Drill as defined in claim I in which the pivot comprises a cylindrical sliding bearing with a longitudinal axis.
4. Drill as defined in claim 3, in which the pivot comprises a second cylindrical sliding bearing with a transverse axis.
5. Drill as defined in claim 1 in which the pivot comprises a spherical sliding bearing.
6. Drill as defined in claim 1 having a guide pad on a longitudinal pivot axis, in which said axis lies outside the periphery surface of the pad.
7. Drill as defined in claim 1, in which the pivoted guide pad is rockable about longitudinal and transverse axes whereby said guide pad adapts itself to the surface of a hole in which said drill is beingoperated.
I I l l

Claims (7)

1. Drill for drilling in metal having a guide pad adapted to slide with frictional contact along the wall of the drill hole, in which the guide pad is pivotally rockable on at least one axis having the same general direction as the sliding surface of the guide pad and situated at a fixed distance from the drill axis.
2. Drill as defined in claim 1, in which the guide pad is mounted on a sliding bearing with a curved sliding bearing surface.
3. Drill as defined in claim 1 in which the pivot comprises a cylindrical sliding bearing with a longitudinal axis.
4. Drill as defined in claim 3, in which the pivot comprises a second cylindrical sliding bearing with a transverse axis.
5. Drill as defined in claim 1 in which the pivot comprises a spherical sliding bearing.
6. Drill as defined in claim 1 having a guide pad on a longitudinal pivot axis, in which said axis lies outside the periphery surface of the pad.
7. Drill as defined in claim 1, in which the pivoted guide pad is rockable about longitudinal and transverse axes whereby said guide pad adapts itself to the surface of a hole in which said drill is being operated.
US00091296A 1969-11-24 1970-11-20 Guide pad mounting on a drill bit Expired - Lifetime US3751177A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE16082/69A SE347450B (en) 1969-11-24 1969-11-24

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US3751177A true US3751177A (en) 1973-08-07

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US00091296A Expired - Lifetime US3751177A (en) 1969-11-24 1970-11-20 Guide pad mounting on a drill bit

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JP (1) JPS4946837B1 (en)
DE (1) DE2057512C3 (en)
ES (1) ES188230Y (en)
FR (1) FR2072230A5 (en)
GB (1) GB1323607A (en)
SE (1) SE347450B (en)

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2416157A1 (en) * 1974-04-03 1975-10-23 Heller Geb DRILLING TOOL
DE2600225A1 (en) * 1975-01-20 1976-07-22 Sandvik Ab DRILLING TOOL
US4108567A (en) * 1975-01-20 1978-08-22 Sandvik Aktiebolag Boring tool
US4130371A (en) * 1976-07-14 1978-12-19 Sandvik Aktiebolag Cutting insert and rotary cutter tool
US4133399A (en) * 1975-12-18 1979-01-09 Wilhelm Hegenscheidt Gmbh Boring device
US4218162A (en) * 1977-11-02 1980-08-19 Elizabeth Jean Hillier Drilling bit
US4573381A (en) * 1984-02-24 1986-03-04 Top Tech, Inc. Boring device
US4596498A (en) * 1982-07-17 1986-06-24 MAPAL Fabrik fur Prazisions werkzeuge Dr. Kress KG Single bit reamer with improved guide members
US5042596A (en) * 1989-02-21 1991-08-27 Amoco Corporation Imbalance compensated drill bit
US5131478A (en) * 1989-02-21 1992-07-21 Brett J Ford Low friction subterranean drill bit and related methods
US5328304A (en) * 1992-01-31 1994-07-12 Mapal Fabrik Fur Prazisionswerkzeuge Dr. Kress Kg Reamer
US5402856A (en) * 1993-12-21 1995-04-04 Amoco Corporation Anti-whirl underreamer
US5697737A (en) * 1994-09-12 1997-12-16 Sandvik Ab Support pad for drill
US5758997A (en) * 1996-08-07 1998-06-02 Mealey; Michael Self-centering indexable drill
US5921727A (en) * 1998-01-20 1999-07-13 Cogsdill Tool Products, Inc. Reamer with friction resistant layer and method for forming same
US6602028B1 (en) * 1999-06-21 2003-08-05 Sandvik Aktiebolag Support pad for a deep hole drill
US20040265080A1 (en) * 2003-05-20 2004-12-30 Sandvik Ab Edge-carrying drill, method for the manufacture of the drill, and drilling tool comprising such a drill
US20050025594A1 (en) * 2003-05-20 2005-02-03 Sandvik Ab Edge-carrying drill body having an internal chip-removal channel
US20050244237A1 (en) * 2002-12-19 2005-11-03 Joerg Guehring Deep hole drill
JP2006239827A (en) * 2005-03-04 2006-09-14 Yunitakku Kk Drill head for cutting deep hole
US20090297285A1 (en) * 2006-04-07 2009-12-03 Unitac, Inc. Deep hole drilling machine
US20100158623A1 (en) * 2008-12-19 2010-06-24 Sandvik Intellectual Property Ab Drill body as well as support pad therefor
WO2010096005A1 (en) * 2009-02-20 2010-08-26 Seco Tools Ab Guide arrangement for a cutting tool and cutting tool including a guide arrangement
US20120051862A1 (en) * 2010-08-25 2012-03-01 Woodruff Douglas J Stabilization of boring tools
US20120070243A1 (en) * 2009-05-29 2012-03-22 Tungaloy Corporation Reamer
US20120134759A1 (en) * 2010-11-29 2012-05-31 Kennametal Inc. Rotating cutting tool and guide insert therefor
US20130078045A1 (en) * 2010-04-23 2013-03-28 Hermann Randecker Drill head for a deep hole drilling tool for bta deep hole drilling, and deep hole drilling tool
WO2013182810A1 (en) * 2012-06-05 2013-12-12 Snecma Calibration head for the drilling of shafts
US9114460B2 (en) 2011-02-28 2015-08-25 Tungaloy Corporation Guide pad, cutting tool body and cutting tool

Families Citing this family (13)

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JPS50132795U (en) * 1974-04-17 1975-10-31
JPS5119626A (en) * 1974-08-07 1976-02-17 Yoshiaki Terauchi KANISEKI BUNJOGI
SE411310B (en) * 1976-11-17 1979-12-17 Sandvik Ab DRILL, PREFERABLY WITH FRIENDS
DE2750705A1 (en) * 1977-11-12 1979-05-17 Wezel & Co Biax Werkzeuge REAMER WITH DRILLING STEP AND HIGHLY UNEQUAL PITCHING OF THE REAMER CUTTERS
DE3211136C2 (en) * 1982-03-26 1984-01-12 Fried. Krupp Gmbh, 4300 Essen Shell end mill
GB9002700D0 (en) * 1990-02-07 1990-04-04 H & B Quickgrind Limited Improvements relating to cutting tools
US5820316A (en) * 1993-12-16 1998-10-13 Kennametal Hertel Ag Guide element for a cutting tool
SE504339C2 (en) * 1994-06-13 1997-01-13 Sandvik Ab drilling Tools
SE509383C2 (en) * 1994-06-13 1999-01-18 Sandvik Ab drilling Tools
JP6119065B2 (en) * 2012-08-01 2017-04-26 株式会社タンガロイ Drill head
DE102022108098A1 (en) 2022-04-05 2023-10-05 Gühring KG Cutting tool with adjustable guide bar
JP7180808B1 (en) * 2022-04-18 2022-11-30 株式会社タンガロイ Cutting tools and cutting inserts for drilling holes
JP7180809B1 (en) * 2022-04-18 2022-11-30 株式会社タンガロイ Cutting tool for drilling

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AT66525B (en) * 1913-10-28 1914-09-10 Rekord Petroleum Ges Mit Besch Automatic relocation device for deep drilling equipment.
DE321935C (en) * 1916-05-31 1920-06-15 Berthold Monasch Dr Ing Drilling method for horizontal earth drilling
GB271839A (en) * 1926-05-25 1928-03-29 U S Tool Company Improvements relating to the hydraulic rotary system of well drilling
GB313802A (en) * 1928-08-09 1929-06-20 Albert Sidney Debose Rotary well drilling apparatus
US1745351A (en) * 1928-10-01 1930-02-04 George G Osborn Drill-bit agitator
US1866082A (en) * 1927-08-10 1932-07-05 Anthony E Carlson Expansion drill bit
US2151646A (en) * 1938-06-28 1939-03-21 Union Oil Co Subsurface speed-up drilling mechanism
US2647726A (en) * 1950-06-30 1953-08-04 Hallen Company Inc Horizontal earth boring machine
FR1221024A (en) * 1958-01-24 1960-05-30 American Iron & Machine Works Pumping device for wells

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US875664A (en) * 1906-04-30 1907-12-31 J P Karns Tunneling Machine Co Tunneling-machine.
US874848A (en) * 1907-03-15 1907-12-24 J P Karns Tunneling Machine Co Sink-shaft drill.
AT66525B (en) * 1913-10-28 1914-09-10 Rekord Petroleum Ges Mit Besch Automatic relocation device for deep drilling equipment.
DE321935C (en) * 1916-05-31 1920-06-15 Berthold Monasch Dr Ing Drilling method for horizontal earth drilling
GB271839A (en) * 1926-05-25 1928-03-29 U S Tool Company Improvements relating to the hydraulic rotary system of well drilling
US1866082A (en) * 1927-08-10 1932-07-05 Anthony E Carlson Expansion drill bit
GB313802A (en) * 1928-08-09 1929-06-20 Albert Sidney Debose Rotary well drilling apparatus
US1745351A (en) * 1928-10-01 1930-02-04 George G Osborn Drill-bit agitator
US2151646A (en) * 1938-06-28 1939-03-21 Union Oil Co Subsurface speed-up drilling mechanism
US2647726A (en) * 1950-06-30 1953-08-04 Hallen Company Inc Horizontal earth boring machine
FR1221024A (en) * 1958-01-24 1960-05-30 American Iron & Machine Works Pumping device for wells

Cited By (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2416157A1 (en) * 1974-04-03 1975-10-23 Heller Geb DRILLING TOOL
DE2600225A1 (en) * 1975-01-20 1976-07-22 Sandvik Ab DRILLING TOOL
US4108567A (en) * 1975-01-20 1978-08-22 Sandvik Aktiebolag Boring tool
US4133399A (en) * 1975-12-18 1979-01-09 Wilhelm Hegenscheidt Gmbh Boring device
US4130371A (en) * 1976-07-14 1978-12-19 Sandvik Aktiebolag Cutting insert and rotary cutter tool
US4218162A (en) * 1977-11-02 1980-08-19 Elizabeth Jean Hillier Drilling bit
US4596498A (en) * 1982-07-17 1986-06-24 MAPAL Fabrik fur Prazisions werkzeuge Dr. Kress KG Single bit reamer with improved guide members
DE3226799C1 (en) * 1982-07-17 1990-04-19 Mapal Fabrik für Präzisionswerkzeuge Dr.Kress KG, 7080 Aalen One-knife reamer
US4573381A (en) * 1984-02-24 1986-03-04 Top Tech, Inc. Boring device
US5042596A (en) * 1989-02-21 1991-08-27 Amoco Corporation Imbalance compensated drill bit
US5131478A (en) * 1989-02-21 1992-07-21 Brett J Ford Low friction subterranean drill bit and related methods
US5328304A (en) * 1992-01-31 1994-07-12 Mapal Fabrik Fur Prazisionswerkzeuge Dr. Kress Kg Reamer
US5402856A (en) * 1993-12-21 1995-04-04 Amoco Corporation Anti-whirl underreamer
US5697737A (en) * 1994-09-12 1997-12-16 Sandvik Ab Support pad for drill
US5758997A (en) * 1996-08-07 1998-06-02 Mealey; Michael Self-centering indexable drill
US5921727A (en) * 1998-01-20 1999-07-13 Cogsdill Tool Products, Inc. Reamer with friction resistant layer and method for forming same
US6602028B1 (en) * 1999-06-21 2003-08-05 Sandvik Aktiebolag Support pad for a deep hole drill
US20050244237A1 (en) * 2002-12-19 2005-11-03 Joerg Guehring Deep hole drill
US20070110529A1 (en) * 2002-12-19 2007-05-17 Joerg Guehring Deep hole drill
US7296953B2 (en) 2002-12-19 2007-11-20 Joerg Guehring Deep hole drill
US20040265080A1 (en) * 2003-05-20 2004-12-30 Sandvik Ab Edge-carrying drill, method for the manufacture of the drill, and drilling tool comprising such a drill
US20050025594A1 (en) * 2003-05-20 2005-02-03 Sandvik Ab Edge-carrying drill body having an internal chip-removal channel
US7326009B2 (en) * 2003-05-20 2008-02-05 Sandvik Intellectual Property Ab Edge-carrying drill body having an internal chip-removal channel
US7320565B2 (en) * 2003-05-20 2008-01-22 Sandvik Intellectual Property Ab Edge-carrying drill, method for the manufacture of the drill, and drilling tool comprising such a drill
JP2006239827A (en) * 2005-03-04 2006-09-14 Yunitakku Kk Drill head for cutting deep hole
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Also Published As

Publication number Publication date
DE2057512B2 (en) 1973-10-18
ES188230U (en) 1974-01-16
DE2057512A1 (en) 1971-06-09
DE2057512C3 (en) 1974-05-30
JPS4946837B1 (en) 1974-12-12
ES188230Y (en) 1974-09-16
SE347450B (en) 1972-08-07
GB1323607A (en) 1973-07-18
FR2072230A5 (en) 1971-09-24

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Owner name: SANTRADE LTD., ALPENQUAI 12, CH-6002 LUCERNE, SWIT

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SANDVIK STEEL OF COLORADO, INC., A CORP. OF CO;REEL/FRAME:004091/0836

Effective date: 19830125