[go: up one dir, main page]

US2901222A - Rotary drill bit - Google Patents

Rotary drill bit Download PDF

Info

Publication number
US2901222A
US2901222A US688335A US68833557A US2901222A US 2901222 A US2901222 A US 2901222A US 688335 A US688335 A US 688335A US 68833557 A US68833557 A US 68833557A US 2901222 A US2901222 A US 2901222A
Authority
US
United States
Prior art keywords
blades
boss
underside
drill bit
disc portion
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
US688335A
Inventor
Jr George W Pease
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to US688335A priority Critical patent/US2901222A/en
Application granted granted Critical
Publication of US2901222A publication Critical patent/US2901222A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits
    • 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
    • Y10T407/00—Cutters, for shaping
    • Y10T407/19—Rotary cutting tool
    • Y10T407/1906—Rotary cutting tool including holder [i.e., head] having seat for inserted tool
    • Y10T407/1908—Face or end mill
    • 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
    • Y10T407/00—Cutters, for shaping
    • Y10T407/26—Cutters, for shaping comprising cutting edge bonded to tool shank
    • 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
    • Y10T407/00—Cutters, for shaping
    • Y10T407/27—Cutters, for shaping comprising tool of specific chemical composition
    • 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
    • Y10T408/78—Tool of specific diverse material
    • 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

Definitions

  • This invention relates to an improved self-cleaning drill bit for use in drilling wells having both hard and soft formations.
  • the primary object of the invention is to provide a more efficient, reliable and desirable drill bit of this kind which has water courses arranged relative to its blades so that clogging of the blades during operation of the bit is eliminated.
  • Another object of the invention is to provide a drill bit of this kind which has radially extending and radially elongated and reinforced horizontal cutting blades, and central vertical boring blades, which are diamondinlaid on their cutting sides so as to substantially reduce wear thereon and to prolong the life and efficiency of the drill bit, the diamond inlays extending effectively to the cutting edges of the blades, and the trailing sides of the blades being reduced to eliminate non-functioning and unnecessary portions of the blades, so as to eliminate wear which would otherwise occur thereat, the blade being generally triangular in cross section.
  • a further object of the invention is to provide a drill bit of the character indicated above which can be made in well-finished, rugged, and serviceable forms at relatively low cost.
  • Figure 1 is a perspective view of a drill bit of the invention
  • Figure 2 is an enlarged bottom plan 'view of Figure 1;
  • Figure ,3 is a central vertical transverse section, taken on the line 3-3 of Figure 2;
  • Figure 4 is a fragmentary horizontal section taken on the line 4-4 of Figure 3;
  • Figure 5 is an enlarged vertical transverse section
  • the illustrated well drill bit comprises a relatively'flat .or
  • short conical body.10 comprising .a fiat circular disc portion 12 having in its peripheral edge closely and uniformly circumferentially spaced scallops or arcuate indentations 14 of equal length, which define therebetween unindented peripheral edge portions 16.
  • a reduced diameter central hub 18 On the upper side of the disc portion 12, and preferably integral therewith, is a reduced diameter central hub 18 of relatively small height, which is surmounted by a conical and externailly threaded tool joint 20.
  • An axial water passage or chamber 22 extends through the disc portion 12, the hub 18, and the tool joint 20.
  • radially elongated cutting blades 42 which radiate from the boss 32 and have substantially the same vertical dimension as the boss 32, as shown in Figure 3.
  • the blades 42 are triangular in cross section and have angular reduced trailing sides 44 and right angular or perpendicular leading or working sides 46, and these sides intersect in relatively sharp lower or cutting edges 48 which are preferably flush with the underside of the boss 32.
  • the trailing sides 44 are cut away at their radially inward ends, to define entrances 50 which open to related water passages or courses 36 and 38.
  • the radially outward ends of the blades are sharpened by bevels 52, and are concentricallyrounded or concaved, .as indicated at 54 in Figure 2.
  • bevels 52 Secured in any suitable manner to and covering the leading sides 46 of the blades 42 from the boss 32 to the outer ends 54 and from the underside 30 of the disc portion 12 to the lower edges 48 of the blades 42 are plates or inlays 56 of diamond-containing wear-resisting composition, which serve to virtually eliminate wear upon and distortion of the working sides 46 and of the lower edges 48 of the blades 42, when the drill bit is rotated in a direction to present the working sides 46 to material in a well in a drilling operation.
  • Adequate rigidity and strength of the drill bit despite its relatively flat or vertically foreshortened form are obtaining by means of the bracing spokes 24 and the braces 40 extending over and along the portions of the blades 42 which reach beyond the peripheral edge of the disc portion 12.
  • the outer sides 62 of the boring blades 60 are arcuate and coincide with the periphery of the boss 32.
  • the flat trailing sides 64 of the blades 60 are in spaced parallel relation to each other; and the flat working sides 66 of the blades 60 are aligned with each other and with the working sides of two related blades 42, and have secured thereon extensions of the diamond-bearing plates 56 of these blades 42.
  • the water passages 36 opening through the underside 34 of the boss at points near the Working sides of the boring blades 60, and open into related water entrances 50.
  • the boring blades have flat horizontal lower ends 68.
  • a'flatldisc vportion having anunderside, a cylindrical axial .boss depending. frornsaid underside disc portion, circumferentially spaced horizontally elongated radialcutting bladeston the vunderside of said discportion and'radiating from said boss, said boss having an underside, and a pair of diametrically pposed segmental vertical boring blades on rand-depending from the underside of the boss,v-lthei-horizontal .cutting blades and the vertical boring blades having flat vertical working sides, the working sidesof some of the cutting blades being aligned withteach other across the bit and with working faces of the vertical boring blades.
  • a flat disc portion havingan underside, a cylindrical axial boss depending from said underside disc portion, circumferentially spaced horizontally elongated radialcutting blades on the underside of said disc, portion and radiatingfrom said boss, said boss having an underside, and a;-pair of diametrically opposed segmental vertical boring blades ,on. and depending from the underside of the boss, the-horizontal cutting blades and.
  • the vertical boring blades having fiat vertical Working sides, the Working sides OfSOlTiG' of the cutting blades being aligned with each other-across the bit and with Working faces of the vertical boringblades, the working faces ofthe cutting bladesxand :ofrthe boring'blades being covered .by diamond-bearing wear-resisting inlays.
  • a Well drill bit a flat ,disc portionhaving an underside, a cylindrical axial boss dependingzfrom said underside disc portion, circumferentially spaced horizontally elongatedradial cutting blades onthe underside of said disc portion and radiating :from said boss,
  • the horizontal cutting blades and the vertical boring blades having flat vertical working sides, .the working sides ofisome of the cutting blades being aligned witheachiotherzacross the bit and with working faces of the verticaliboring. blades, a vertical axial water chamber"extendinguthrough said disc portion and into said boss and havingaiclosed lower" end -on a level 'below the'disc portion, and .water passages leading from saidchamber and traversing said boss below the disc' portion :and opening at the'sides of the boss between adjacent cutting blades.
  • a well drill bit comprising a flat circulardisc portion having a fiat underside anda peripheral edge, an upstanding axial hub on said disc portion, a zcylindrical axial bosson and depending from the underside of the disc portion, radial cutter blades on and depending from said underside and having inward ends-meeting said boss, said boss having an underside and said: cutting blades having lower edges on a level with the underside of the boss, a vertical water chamber formed in said hub, said disc portion and in said boss and having a closed lower end within the boss and on a level below the underside of the disc portion, radial water passages formed in said boss and leading from said water chamber to the exterior of the boss and opening into the spaces between adjacent cutting blades at the inward ends of the cutting blades.
  • a well drill bit comprising a flat circular disc portion having a flatgunderside anda -peripheral :edge, an upstanding axial hub on said disc portion, a cylindrical axial boss' on and dependingfrom the underside of the disc portion, radial cutter blades, on and depending from said underside and having inward ends meeting said boss, said boss' havi-ng an underside and said cutting blades having lower edges on a level with the underside of the boss, a vertical water chamber formed in said hub, said disc portion and in said boss and having a closed lower :end withinthe .boss :and on:,a level below the underside of the; disc-,portion,-radial water passages formed in said boss and leading from said water chamber to the ;.exterior of ,thezboss and opening into the spaces Ibetween adjacentcutting blades at the inward :endsof the cutting blades, :and .apair of vdiametrically opposed segmental boring bladesfixedon and depending
  • a well drillbit comprising aflat circularndisc portion having :a flatmndersideand ,a peripheraltedge, an

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)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Earth Drilling (AREA)

Description

Aug. 25, 1959 5. w. PEASE, JR
ROTARY DRILL BIT Filed Oct. 4, 1957 INVENTOR. Gecaee VLFEASEA 2.
ATTORNEYS United States Patent ROTARY DRILL BIT George W. Pease, Jr., Fairfax, Okla.
Application October 4, 1957, Serial No. 688,335
6 Claims. (Cl. 255-61) This invention relates to an improved self-cleaning drill bit for use in drilling wells having both hard and soft formations.
The primary object of the invention is to provide a more efficient, reliable and desirable drill bit of this kind which has water courses arranged relative to its blades so that clogging of the blades during operation of the bit is eliminated.
Another object of the invention is to provide a drill bit of this kind which has radially extending and radially elongated and reinforced horizontal cutting blades, and central vertical boring blades, which are diamondinlaid on their cutting sides so as to substantially reduce wear thereon and to prolong the life and efficiency of the drill bit, the diamond inlays extending effectively to the cutting edges of the blades, and the trailing sides of the blades being reduced to eliminate non-functioning and unnecessary portions of the blades, so as to eliminate wear which would otherwise occur thereat, the blade being generally triangular in cross section.
A further object of the invention is to provide a drill bit of the character indicated above which can be made in well-finished, rugged, and serviceable forms at relatively low cost.
Other objects and advantageous features of the invention will be apparent from the following description and the accompanying drawings, wherein, for purposes of illustration only, a specific form of the invention is set forth in detail.
In the drawings:
Figure 1 is a perspective view of a drill bit of the invention;
Figure 2 is an enlarged bottom plan 'view of Figure 1;
Figure ,3 is a central vertical transverse section, taken on the line 3-3 of Figure 2; M
Figure 4 is a fragmentary horizontal section taken on the line 4-4 of Figure 3; and
Figure 5 is an enlarged vertical transverse section,
taken on the line 5-5 of Figure 4.
Referring in detail to the drawings, wherein likenumerals designate like parts throughout the several views,
the illustrated well drill bit comprises a relatively'flat .or
short conical body.10 comprising .a fiat circular disc portion 12 having in its peripheral edge closely and uniformly circumferentially spaced scallops or arcuate indentations 14 of equal length, which define therebetween unindented peripheral edge portions 16. On the upper side of the disc portion 12, and preferably integral therewith, is a reduced diameter central hub 18 of relatively small height, which is surmounted by a conical and externailly threaded tool joint 20. An axial water passage or chamber 22 extends through the disc portion 12, the hub 18, and the tool joint 20.
Radiating from the hub 18 and secured to the disc portion are equally circumferentially spaced, radially elongated reinforcing spokes 24, which have radially outwardly declining upper surfaces 26, and squared outer courses 38 which extend from the periphery of the boss. 32 into the axial water chamber 22, with some of the passages 36 and 38 being aligned or registered with each other, as shown in Figure 4.
Preferably formed integral with the underside 30 of the disc portion 12', and with and having brace portions 40 at and extending radially beyond the peripheral edge portions 16 of the disc portion 12, are radially elongated cutting blades 42, which radiate from the boss 32 and have substantially the same vertical dimension as the boss 32, as shown in Figure 3. As shown in Figures 1 and 5, the blades 42 are triangular in cross section and have angular reduced trailing sides 44 and right angular or perpendicular leading or working sides 46, and these sides intersect in relatively sharp lower or cutting edges 48 which are preferably flush with the underside of the boss 32. As shown in Figure 4, the trailing sides 44 are cut away at their radially inward ends, to define entrances 50 which open to related water passages or courses 36 and 38. The radially outward ends of the blades are sharpened by bevels 52, and are concentricallyrounded or concaved, .as indicated at 54 in Figure 2. Secured in any suitable manner to and covering the leading sides 46 of the blades 42 from the boss 32 to the outer ends 54 and from the underside 30 of the disc portion 12 to the lower edges 48 of the blades 42 are plates or inlays 56 of diamond-containing wear-resisting composition, which serve to virtually eliminate wear upon and distortion of the working sides 46 and of the lower edges 48 of the blades 42, when the drill bit is rotated in a direction to present the working sides 46 to material in a well in a drilling operation.
Because of the described forms of and cooperative arrangements of the horizontal and vertical water passages 36 and 38, respectively, accumulation and lodging of material between adjacent blades during operation of the drill bit is eliminated or reduced, so that clogging of the drill bit to an extent requiring pulling thereof from a well being drilled is eliminated.
Adequate rigidity and strength of the drill bit despite its relatively flat or vertically foreshortened form are obtaining by means of the bracing spokes 24 and the braces 40 extending over and along the portions of the blades 42 which reach beyond the peripheral edge of the disc portion 12.
Fixed on and preferably integral with and depending fromjthe underside 34 of the boss 32, are two substantially diametrically opposed boring blades 60, which are segmental or triangular in horizontal cross section, as shown in Figure 2. The outer sides 62 of the boring blades 60 are arcuate and coincide with the periphery of the boss 32. The flat trailing sides 64 of the blades 60 are in spaced parallel relation to each other; and the flat working sides 66 of the blades 60 are aligned with each other and with the working sides of two related blades 42, and have secured thereon extensions of the diamond-bearing plates 56 of these blades 42. The water passages 36 opening through the underside 34 of the boss at points near the Working sides of the boring blades 60, and open into related water entrances 50. The boring blades have flat horizontal lower ends 68.
' Although I have shown and described in detail herein a specific embodiment Olf the invention, it is to be understood that any changes in the forms of and in the relative arrangements of components can be made within the scope of the invention or defined ..by-.the.subjo-ined claims. i
What is claimed: 7 V
1. Ina well drill bit, a'flatldisc vportion having anunderside, a cylindrical axial .boss depending. frornsaid underside disc portion, circumferentially spaced horizontally elongated radialcutting bladeston the vunderside of said discportion and'radiating from said boss, said boss having an underside, and a pair of diametrically pposed segmental vertical boring blades on rand-depending from the underside of the boss,v-lthei-horizontal .cutting blades and the vertical boring blades having flat vertical working sides, the working sidesof some of the cutting blades being aligned withteach other across the bit and with working faces of the vertical boring blades.
2. In a Well drill bit, a flat disc portion havingan underside, a cylindrical axial boss depending from said underside disc portion, circumferentially spaced horizontally elongated radialcutting blades on the underside of said disc, portion and radiatingfrom said boss, said boss having an underside, and a;-pair of diametrically opposed segmental vertical boring blades ,on. and depending from the underside of the boss, the-horizontal cutting blades and. the vertical boring blades having fiat vertical Working sides, the Working sides OfSOlTiG' of the cutting blades being aligned with each other-across the bit and with Working faces of the vertical boringblades, the working faces ofthe cutting bladesxand :ofrthe boring'blades being covered .by diamond-bearing wear-resisting inlays.
3. In :a Well drill bit, a flat ,disc portionhaving an underside, a cylindrical axial boss dependingzfrom said underside disc portion, circumferentially spaced horizontally elongatedradial cutting blades onthe underside of said disc portion and radiating :from said boss,
pending from the underside of the boss, the horizontal cutting blades and the vertical boring blades: having flat vertical working sides, .the working sides ofisome of the cutting blades being aligned witheachiotherzacross the bit and with working faces of the verticaliboring. blades, a vertical axial water chamber"extendinguthrough said disc portion and into said boss and havingaiclosed lower" end -on a level 'below the'disc portion, and .water passages leading from saidchamber and traversing said boss below the disc' portion :and opening at the'sides of the boss between adjacent cutting blades.
4. A well drill bit comprising a flat circulardisc portion having a fiat underside anda peripheral edge, an upstanding axial hub on said disc portion, a zcylindrical axial bosson and depending from the underside of the disc portion, radial cutter blades on and depending from said underside and having inward ends-meeting said boss, said boss having an underside and said: cutting blades having lower edges on a level with the underside of the boss, a vertical water chamber formed in said hub, said disc portion and in said boss and having a closed lower end within the boss and on a level below the underside of the disc portion, radial water passages formed in said boss and leading from said water chamber to the exterior of the boss and opening into the spaces between adjacent cutting blades at the inward ends of the cutting blades.
5. A well drill bit comprising a flat circular disc portion having a flatgunderside anda -peripheral :edge, an upstanding axial hub on said disc portion, a cylindrical axial boss' on and dependingfrom the underside of the disc portion, radial cutter blades, on and depending from said underside and having inward ends meeting said boss, said boss' havi-ng an underside and said cutting blades having lower edges on a level with the underside of the boss, a vertical water chamber formed in said hub, said disc portion and in said boss and having a closed lower :end withinthe .boss :and on:,a level below the underside of the; disc-,portion,-radial water passages formed in said boss and leading from said water chamber to the ;.exterior of ,thezboss and opening into the spaces Ibetween adjacentcutting blades at the inward :endsof the cutting blades, :and .apair of vdiametrically opposed segmental boring bladesfixedon and depending from the underside of the boss and having lower ends spaced below thecutting blades.
-.-6. A well drillbit comprising aflat circularndisc portion having :a flatmndersideand ,a peripheraltedge, an
upstandingaxial :hub ,on said vdisc portion, a cylindrical axial .boss on :and depending fromutheunderside of the disc portion, radialcutter blades on and depending from said underside ;and havingtinward ends meet-ingsaid boss, said boss having an underside and said cutting blades'lhavinglower edges on a level :with the underside of the boss, a vertical water chamberformed in said :hub, said ,disczportion and in said'boss: and having a closed lower end-within the ,boss'and ona level below the underside of .the disc portion,; radial'water passages formed inssaidboss 7 .and-leadingrfrom: said water chamber to the zexte'rior of the =boss;. and openingrinto the spaces between adjacent cutting blades;;at-the inward ends ofuthe cuttingbladeaanda pair :ofgdiarnetrically opposed-segmental boringrblades fixed :on and depending from the punderside of the sboss :and. having lower 2 ends spacedxbelow; the cutting blades,; saidx boring blades having working ends and said cutting .blades having working sides, working sides of cuttingrblades being aligned rwithaand "parallel :to 'workingl'en'ds of .boring blades.
ReferencesCite'd-in the file of this patent UNITED STATES I PATENTS
US688335A 1957-10-04 1957-10-04 Rotary drill bit Expired - Lifetime US2901222A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US688335A US2901222A (en) 1957-10-04 1957-10-04 Rotary drill bit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US688335A US2901222A (en) 1957-10-04 1957-10-04 Rotary drill bit

Publications (1)

Publication Number Publication Date
US2901222A true US2901222A (en) 1959-08-25

Family

ID=24764019

Family Applications (1)

Application Number Title Priority Date Filing Date
US688335A Expired - Lifetime US2901222A (en) 1957-10-04 1957-10-04 Rotary drill bit

Country Status (1)

Country Link
US (1) US2901222A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3095053A (en) * 1960-02-01 1963-06-25 Jersey Prod Res Co Drill bit
US3095935A (en) * 1958-09-25 1963-07-02 Jersey Prod Res Co Coring bit
US3110084A (en) * 1958-08-15 1963-11-12 Robert B Kinzbach Piloted milling tool
US3811163A (en) * 1972-12-07 1974-05-21 Gen Dynamics Corp Plunge milling tool
US4006788A (en) * 1975-06-11 1977-02-08 Smith International, Inc. Diamond cutter rock bit with penetration limiting
US4440531A (en) * 1982-03-23 1984-04-03 Tri Tool Inc. Reaming and counterboring cutting tool
US4654948A (en) * 1985-12-02 1987-04-07 W. Wesley Perry Method for renewing the cutting face of a diamond drill bit
US4654947A (en) * 1985-12-02 1987-04-07 W. Wesley Perry Drill bit and method of renewing drill bit cutting face
US5020394A (en) * 1988-10-14 1991-06-04 Sumitomo Electric Industries, Ltd. Polycrystal diamond fluted tool and a process for the production of the same
US20090057030A1 (en) * 2007-09-05 2009-03-05 Sandvik Mining And Construction Mining claw bit
US20160107247A1 (en) * 2014-10-17 2016-04-21 Ji Zhun Precision Industry (Hui Zhou) Co., Ltd. Milling cutter

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US977955A (en) * 1909-05-25 1910-12-06 J P Karns Tunneling Machine Co Cutter-head for tunneling-machines.
US1407927A (en) * 1921-02-07 1922-02-28 Caveney George Adjustable well-drilling bit
US1413471A (en) * 1920-06-02 1922-04-18 George F Goerner Apparatus for boring drifts or shafts
US1897267A (en) * 1929-10-05 1933-02-14 Mecom Harvey Rock drill
US2511991A (en) * 1948-02-13 1950-06-20 Nussbaum Leon Rotary drilling tool
US2545195A (en) * 1946-08-24 1951-03-13 Shell Dev Diamond bit
US2696973A (en) * 1951-02-09 1954-12-14 Francis R Britton Nonsticking drill bit

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US977955A (en) * 1909-05-25 1910-12-06 J P Karns Tunneling Machine Co Cutter-head for tunneling-machines.
US1413471A (en) * 1920-06-02 1922-04-18 George F Goerner Apparatus for boring drifts or shafts
US1407927A (en) * 1921-02-07 1922-02-28 Caveney George Adjustable well-drilling bit
US1897267A (en) * 1929-10-05 1933-02-14 Mecom Harvey Rock drill
US2545195A (en) * 1946-08-24 1951-03-13 Shell Dev Diamond bit
US2511991A (en) * 1948-02-13 1950-06-20 Nussbaum Leon Rotary drilling tool
US2696973A (en) * 1951-02-09 1954-12-14 Francis R Britton Nonsticking drill bit

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3110084A (en) * 1958-08-15 1963-11-12 Robert B Kinzbach Piloted milling tool
US3095935A (en) * 1958-09-25 1963-07-02 Jersey Prod Res Co Coring bit
US3095053A (en) * 1960-02-01 1963-06-25 Jersey Prod Res Co Drill bit
US3811163A (en) * 1972-12-07 1974-05-21 Gen Dynamics Corp Plunge milling tool
US4006788A (en) * 1975-06-11 1977-02-08 Smith International, Inc. Diamond cutter rock bit with penetration limiting
US4440531A (en) * 1982-03-23 1984-04-03 Tri Tool Inc. Reaming and counterboring cutting tool
US4654948A (en) * 1985-12-02 1987-04-07 W. Wesley Perry Method for renewing the cutting face of a diamond drill bit
US4654947A (en) * 1985-12-02 1987-04-07 W. Wesley Perry Drill bit and method of renewing drill bit cutting face
US5020394A (en) * 1988-10-14 1991-06-04 Sumitomo Electric Industries, Ltd. Polycrystal diamond fluted tool and a process for the production of the same
US20090057030A1 (en) * 2007-09-05 2009-03-05 Sandvik Mining And Construction Mining claw bit
US20160107247A1 (en) * 2014-10-17 2016-04-21 Ji Zhun Precision Industry (Hui Zhou) Co., Ltd. Milling cutter
US10112240B2 (en) * 2014-10-17 2018-10-30 Ji Zhun Precision Industry (Hui Zhou) Co., Lt Milling cutter

Similar Documents

Publication Publication Date Title
US2901222A (en) Rotary drill bit
US3938599A (en) Rotary drill bit
US3106973A (en) Rotary drill bits
US5265685A (en) Drill bit with improved insert cutter pattern
US1388490A (en) Rotary earth-boring drill
US3126067A (en) Roller bit with inserts
US2838284A (en) Rotary drill bit
US3537538A (en) Impregnated diamond bit
USRE32036E (en) Drill bit
US4606418A (en) Cutting means for drag drill bits
US7621350B2 (en) Impregnated bit with changeable hydraulic nozzles
US4323130A (en) Drill bit
US4086973A (en) Asymmetric insert for inner row of an earth boring cutter
US2371489A (en) Drill bit
MX2011000984A (en) Dynamically stable hybrid drill bit.
US4313506A (en) Drill cutter bit
US3110084A (en) Piloted milling tool
US3058535A (en) Rotary drill bit
US2953354A (en) Drill bit
US2879973A (en) Percussion drill bit
US2296939A (en) Well bit protector
US2927777A (en) Roller cutter with gauge cutting reamer
US3220497A (en) Rotary drag bit
US3118511A (en) Rotary drill bits
US1734469A (en) Drill bit