US2687875A - Well drill - Google Patents

Well drill Download PDF

Info

Publication number
US2687875A
US2687875A US257314A US25731451A US2687875A US 2687875 A US2687875 A US 2687875A US 257314 A US257314 A US 257314A US 25731451 A US25731451 A US 25731451A US 2687875 A US2687875 A US 2687875A
Authority
US
United States
Prior art keywords
inserts
drill
cutters
cutter
bit
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
US257314A
Other languages
English (en)
Inventor
Erwin A Morlan
Floyd L Scott
Henry B Woods
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.)
Hughes Tool Co
Original Assignee
Hughes Tool Co
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=22975774&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US2687875(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority to BE510109D priority Critical patent/BE510109A/xx
Priority to NL71579D priority patent/NL71579C/xx
Priority to BE510209D priority patent/BE510209A/xx
Application filed by Hughes Tool Co filed Critical Hughes Tool Co
Priority to US257314A priority patent/US2687875A/en
Priority to GB6311/52A priority patent/GB715977A/en
Priority to FR1052974D priority patent/FR1052974A/fr
Priority to DEH12036A priority patent/DE913523C/de
Priority to CH307229D priority patent/CH307229A/de
Publication of US2687875A publication Critical patent/US2687875A/en
Application granted granted Critical
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/14—Cooking-vessels for use in hotels, restaurants, or canteens
    • A47J27/16—Cooking-vessels for use in hotels, restaurants, or canteens heated by steam
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/08—Pressure-cookers; Lids or locking devices specially adapted therefor
    • A47J27/0804—Locking devices
    • 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
    • E21B10/08—Roller bits
    • E21B10/16—Roller bits characterised by tooth form or arrangement
    • 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
    • E21B10/50—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of roller type
    • E21B10/52—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of roller type with chisel- or button-type inserts

Definitions

  • This invention relates to rotary earth boring drill bits and to the rolling cutters therefor, such drill bits being utilized in forming earth bores in the quest for water, oil, gas, sulphur and the like.
  • the invention is particularly applicable to the conical cutters on earth boring drills wherein two or more such cutters are mounted in juxtaposed relation to roll upon and disintegrate the bottom of the hole. While the invention is hereinafter described in connection with the cone type of well drill, it is to be understood that the invention may find utility in well drills having other types of rolling cutters such as those used in reamers, core bits and cross roller bits.
  • the primary object of the invention is to provide a rotary drill bit capable of drilling hard, abrasive formations at a faster penetration rate 2 and over longer periods of time than had with conventional rock bits.
  • Another object is to provide a drill bit which will maintain full gage hole in the hardest and most abrasive of rock formations.
  • Still another object is to provide a drill bit having rolling cutters on which the cutting elements are so formed and arranged that they will dieintegrate full bottom of the hole, are capable of resisting the abrasive action of extremely hard earth formations and will, at the same time, effect rapid disintegration of such formations.
  • Another object is to provide a composite rolling cutter structure for drill bits in which carbide cutting elements are secured in the body of the cutter in a manner that such material can be utilized without breaking or crumbling under the tremendous impact loads involved in drilling high strength earth formations.
  • a further object is to provide a drill bit in which the cutting elements on adjacent cutters move in such contiguity that a self-cleaning action is effected.
  • Still another object is to provide a drill bit having rolling cutters on which the cutting elements are so arranged that they are adapted to interfit and hence to effect the cleaning action already indicated.
  • rolling cutters which comprise a cutter body having wear resistant inserts with their outer ends protruding slightly from the surface thereof and presenting rounded or ovoid surfaces to engage and disintegrate material to be removed by the drilling operation.
  • Fig. 1 is an end view showing the cutting surface of a three cone bit embodying the invention
  • Fig. 2 is a side elevational view of the bit, a portion of the bit being shown in section rotated into the plane of the paper to more clearly show the illustrated embodiment;
  • Fig. 3 is an enlarged broken detail showing the age cutting structure
  • Fig. 4 is a broken detail showing a slight modification of the gage Cutting structure
  • Fig. 5 is a broken detail showing still another form of the gage cutting structure
  • Fig. 6 is a perspective view of an alternate form of the wear resistant inserts used in practicing theinvention.
  • Fig. '7 is an elevational view of a generally cylindrical type of rolling cutter embodying the invention.
  • the present invention is the result of a discovery that hard formations can be penetrated more rapidly and a single .drillbit will make many more feet of hole than conventional rock bits if wear resistant cutting 'elements of the drill bit having rounded or ovoid surfaces are presented to the formation to effect disintegration thereof.
  • 'a'drill bit'embodying the invention was run in West Texas at a depth of approximately 12,000 feet in a formation of abrasive lime and chert stringers.
  • the drill bit produced 75feet of hole in 23 hours, an average of .327 feetper-houn- In an adjacent well and in the sameformation five'bits of conventional type were used in drilling 78 feet of hole. .These five bits drilled, while.
  • the word -ovoid. is used to state. that the outer .ends of the wear .resistant inserts are rounded or arcuateasdistinguished from conical, pyramidal or chisel edged. Itcomprehends spherical, ellipsoidal or. other rounded .end configuration as-will further appear.
  • Thisfeature of construction serves to .protect the inserts against breakage since the best wear resistant materials, such as carbides, are relatively'brittle. At the same .time, however, it provides adequate coverage of'the bottom of the hole so that uniform disintegration of the bottom is efiected.
  • An embodiment of the invention as shown in a three-cone drill bit in Figs. 1 and 2, comprises a head I havinga threaded shank 2 for attachment to the lower end of 'a-drill' string or stem. Downwardly extending legs '3 on the head l'are provided with downwardly and inwardly extending shafts 4, one of which is shown insection in Fig. 2.
  • Cutters '5 enclose-'theinner'ends ofthe shafts S and rotate-upon suitable'bearings-such as the roller bearing *6 at'-the base or heel of the cutter, ball bearings I inwardly therefrom and a friction-bearingfl attheinnermostend of theshaft, as .is .well known inthe .art, the ball bearing 1 serving both toassume radial load and axial thrusts and to retain .the cutter on the shaft.
  • suitable'bearings such as the roller bearing *6 at'-the base or heel of the cutter, ball bearings I inwardly therefrom and a friction-bearingfl attheinnermostend of theshaft, as .is .well known inthe .art, the ball bearing 1 serving both toassume radial load and axial thrusts and to retain .the cutter on the shaft.
  • each of the lands is provided with a row, or rows, of wear resistant inserts individually identified as 3%. These inserts extend inwardly into the body 28 and are held in place therein with their outer ends protruding from the surface of the associated land.
  • the lands may be of substantially the same width as the transverse dimensions of the inserts 30 but are preferably slightly wider, as shown. Except for the heel lands 23, 26 and. 29, suchlands are so arranged on the respective cones that they are in confrontingrelation with the lands on the adjacent cones.
  • each edge portion of a land on one cone is proximate or overlies anedge portion of aland onan adjacent cone.
  • the protruding ends of the inserts 3e are so oriented as to adequately cover bottomand the inserts of -a given row have an interfitting relationship with the rows of the adjacent cutters. This not only provides adequate coverage of bottom but also provides efficient utilization of the limited space available for the various portions of the bit and also provides a self-cleaning action of the bit.
  • the inserts contacting the rock support a weight of 40,000 pounds to 50,000 pounds weight or more while drilling with a drill bit 8%" in diameter they must be held .securely in place by some such method as a drive,.press or shrink fit in holes drilled in the lands and hottomed in these holes to support high impact loading.
  • the. inserts may be cooled to a relatively low temperature so that contraction thereof will facilitate placement into the holes in the lands, in which case the body 20 may ormay not be heated to further assist in providing the desired fit.
  • the inserts may also be positioned ina mold so that the metal of .the body 20 and the. lands thereon whencast will bond with the inserts-and provide an integral or unitary structure. Whileparticular-.modes of securing the inserts in'place have been suggested, it is to be understood that the invention is. not confined to any particular method of accomplishing this purpose.
  • ovoid protruding ends on the in serts 35' provides relatively blunt surfaces for engagenient with the surface to be disintegrated. This feature, it would appearwould lead to a slow rate of drilling. Unexpectedly, however, it has been found that the drilling rate in chert and other formations havingsimilar drilla'bility is greatly enhanced over that of conventional bits provided with cutter teethhaving edges'intended to penetrate the formation being drilled. Also, the ovoid protruding ends of the inserts 30are relatively resistant to breakage and for this reason the inserts have a long life since normal wear, as compared with disintegration from breakage, is extremely slow. Furthermore normal wear is of such nature that the ovoid surfaces or ends continue to be ovoid and for this reason cutting effectiveness remains substantially constant over a long drilling period.
  • spearpoint IS on cone ii) the No. l cone.
  • This spearpoint is preferably made larger than the extension of the balance of the cone to provide an adequate volume of metal to effectively carry a sufficient number of inserts 30 that it will disintegrate the earth formation at the center of the hole and will resist wear as long as other cutting elements on,
  • the gage inserts may be so oriented that their axes are directed toward the juncture of the wall of the well bore and the bottom thereof. In such case it is preferable that the ovoid ends of the inserts have their surfaces substantially tangent to both the gage surface 3! and the bottom cutting surface of the cutter body. In the preferred structure, and as shown, the axes of the gage inserts are so directed that they substantially bisect the angle formed by the bottom cutting surface of the cutter and the gage surface 3
  • the gage cutting inserts in one or more of the cutters may be positioned slightly outwardly from the position shown in Figs. 1 and 2, as shown in Fig. 3, in which case the outermost surfaces may be flattened at 32 so that a greater area is presented to effect disintegrating action at gage and assure uniform gage.
  • gage inserts are positioned substantially parallel to the gage surface 3
  • the ovoid projections of the heel inserts cut bottom at the juncture of the bottom of the well bore and the side walls, and the body portions contribute to maintaining uniform gage throughout the useful life of the bit.
  • the bodies of the inserts may be flattened to provide surfaces 33 for gage cutting surfaces instead of the cylindrical surface indicated at 34.
  • the modification of the cutting structure shown in Fig. 5 is similar to that of Fig. 4 but the insert 30 is so positioned lengthwise of the cutting surface that the ovoid end 35 serves to maintain gage and the side surface 36 contacts the bottom of the hole to effect disintegrating action thereon.
  • Fig. 6 shows a modified form of insert that may be used when practicing the invention.
  • the shank 3'! of the insert 30 is noncircular.
  • the outer end of the body is rounded to present an ovoid surface 38 for protrusion from the surface of the cutter body in which the insert is secured to obtain the advantages of the invention.
  • Fig. 7 the invention is shown as embodied in a generally cylindrical type of cutter 39.
  • the cutter body shown at 20' has annular lands 40 and 4
  • Each land is provided with a series of wear resistant inserts 30 as already explained. It is to be understood that any desired arrangement of the lands and spacing of inserts therein may be used without departing from the spirit of the invention.
  • Inserts 30 have been referred to as comprising a wear resistant material.
  • a wear resistant material is a metal carbide such as chromium, molybdenum, tantalum, titanium, tungsten or vanadium used either as single or multiple car bides. More specifically sintered tungsten car bide inserts have been found to satisfactorily serve the intended purpose. It has also been found that inserts having a transverse dimension of approximately three eights inch and extending into the body 29 a distance approximately equal to such dimension are subject to a minimum of breakage and loss from their locations in the body.
  • the cutter body 20 is preferably a carburizing grade of steel.
  • such material has substantially twice the thermal coefficient of expansion of a metal carbide. This wide disparity of temperature characteristics requires consideration inasmuch as bottom hole temperatures are frequently in excess of 212 Fahrenheit and hence there is a tendency for the inserts 30 to loosen and become displaced from their locations in the body 20. There must be adequate holding power at all times between the metal of the body and the inserts that they will be held in place regardless of temperature and the extreme stresses to which the cutters 5 are subjected.
  • One manner of providing such holding power is to have the inserts 30 larger than the openings 43 to receive them. An interference as great as 0.006 inch may be used.
  • each insert is preferably provided with a slight bevel M at its inner end. This feature of construction not only facilitates entrance of the. inserts into their respective openings 43 but also provides a minute space to receive such metal as shears from the wall of the opening 43 as the insert is forced to its terminal position.
  • a rotary well drill comprising, a head, inwardly extending shafts thereon, rolling cutters rotatably mounted on said shafts, at least one of said cutters comprising a body having peripheral lands, and a row of wear resistant inserts in each of said lands, each of said inserts having an ovoid outer end protruding from the periphery of its associated land to present a rounded surface to produce disintegrating action upon the formation being drilled.
  • theimprovement comprising, a plurality. of; wearresistant inserts in each cutter, said inserts having ovoid protruding outer ends presenting. arcuate surfaces toiengage and produce disintegratingaction upon the formation being, penetrated by; the drill.
  • a rolling cutter-for rock drills comprising, abody, andaplurality-of wear resistant inserts insaid-body-end hayingtheir outer ends protrudingfrom thesurface of the body, said protruding, ends being ovoid-so that arcuate surfaces are presentedfor engagement with and disintegrationof materiahtobe, removed by the cutter.
  • Arolling-cutter for rock drills comprising cuate, surfacesfor. engagement with and disintegration, ofmaterialtobe removed by the cutter.
  • a rolling cutter for drill bits comprising, abody havingabottom, cutting surface and an intersecting gage surface, the improvement com prising a ,row of, wear resistant inserts secured in the body at the intersection of said surfaces, said inserts, extending in.-a direction to approximately bisect the angle, formedby said surfacesand having their outer ends ovoid and,protruding from the surfaceofthe. body whereby the inserts effect cuttingaway of, both the bottom and side wall of a wellbore at. their juncture.
  • a conical cutter for rotary drill bits comprising, a conical body, a. plurality of cutting elements spaced longitudinally. along the peripheral surface on saidbodma row of. Wear resistant insertssecured insaidbody at the base thereof and in a.d ire ction to approximately bisect the angle formediby the cuttingsurface and the base of the cone, said,inserts having portions protruding from the body to effect disintegration of the earth formationat the juncture, of the bottom and side wall of an earth bore being drilledand to maintain sage of the bore.
  • A1 rolling cutter for drill bits comprising, a body. there being; a. plurality of circumferentially and axially spaced: cylindrical openings in said body, a'formation disintegrating insert in each of said. openings, each of-said insertshaving a cylindricalportion and an ovoid end portion, the cylindrical1portionyof each-of the inserts having an interference fit in its opening to retain the insert in theopening, the ovoid end of the insert protruding from the surface of the body toeffect formation disintegrating action.
  • Arollingcutter for rock drills comprising, a body, and-aplurality of wear resistant inserts immovably secured in said body and havingva portionof the surface thereof. protruding beyond the-surface -of the body, said protruding portion beingovoid so-that, each insert presents an.arcuate surface for engagement with and disintegration-of material to be removedby the cutter.

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)
  • Food Science & Technology (AREA)
  • Earth Drilling (AREA)
US257314A 1951-11-20 1951-11-20 Well drill Expired - Lifetime US2687875A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
BE510109D BE510109A (de) 1951-11-20
NL71579D NL71579C (de) 1951-11-20
BE510209D BE510209A (de) 1951-11-20
US257314A US2687875A (en) 1951-11-20 1951-11-20 Well drill
GB6311/52A GB715977A (en) 1951-11-20 1952-03-11 Improvements in or relating to drill bits
FR1052974D FR1052974A (fr) 1951-11-20 1952-03-24 Trépan pour appareils de forage des puits
DEH12036A DE913523C (de) 1951-11-20 1952-04-04 Drehbohrmeissel
CH307229D CH307229A (de) 1951-11-20 1952-04-16 Drehbohrmeissel.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US257314A US2687875A (en) 1951-11-20 1951-11-20 Well drill

Publications (1)

Publication Number Publication Date
US2687875A true US2687875A (en) 1954-08-31

Family

ID=22975774

Family Applications (1)

Application Number Title Priority Date Filing Date
US257314A Expired - Lifetime US2687875A (en) 1951-11-20 1951-11-20 Well drill

Country Status (7)

Country Link
US (1) US2687875A (de)
BE (2) BE510209A (de)
CH (1) CH307229A (de)
DE (1) DE913523C (de)
FR (1) FR1052974A (de)
GB (1) GB715977A (de)
NL (1) NL71579C (de)

Cited By (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2749093A (en) * 1952-09-12 1956-06-05 Reed Roller Bit Co Drill bit
US2774570A (en) * 1954-05-03 1956-12-18 Hughes Tool Co Roller cutter for earth drills
US2774571A (en) * 1954-07-06 1956-12-18 Hughes Tool Co Cone type well drill
US2927778A (en) * 1956-07-05 1960-03-08 Chicago Pneumatic Tool Co Rotary drill cutters
US2990025A (en) * 1958-06-16 1961-06-27 Dresser Ind Bit
US3134447A (en) * 1962-01-31 1964-05-26 Hughes Tool Co Rolling cone rock bit with wraparound spearpoints
US3185228A (en) * 1963-01-21 1965-05-25 Hughes Tool Co Rotary-percussion drill bit with heel row inserts to prevent wedging
US3269470A (en) * 1965-11-15 1966-08-30 Hughes Tool Co Rotary-percussion drill bit with antiwedging gage structure
US3306381A (en) * 1963-12-16 1967-02-28 Drilco Oil Tools Inc Reaming apparatus
US3361494A (en) * 1966-08-04 1968-01-02 Hughes Tool Co Journal bearing
US3382940A (en) * 1965-10-21 1968-05-14 Frank E. Stebley Percussion drill bit
US3412946A (en) * 1964-08-22 1968-11-26 Dorries A G O Comminuting device
US3442342A (en) * 1967-07-06 1969-05-06 Hughes Tool Co Specially shaped inserts for compact rock bits,and rolling cutters and rock bits using such inserts
US3581835A (en) * 1969-05-08 1971-06-01 Frank E Stebley Insert for drill bit and manufacture thereof
US3599737A (en) * 1970-03-02 1971-08-17 Smith International Anchored hardened cutter inserts
US3603414A (en) * 1970-01-30 1971-09-07 Frank E Stebley Insert for drilling unit
US3695723A (en) * 1970-07-28 1972-10-03 Kennametal Inc Abrading tool
US3858670A (en) * 1972-05-08 1975-01-07 Eugene Gray Ott Insert cutter for cutting kerfs
US4108692A (en) * 1975-01-13 1978-08-22 Smith International, Inc. Rock bit roller cutter and method therefor
US4231438A (en) * 1978-10-10 1980-11-04 Smith International, Inc. Straight hole insert drill bit
US4393949A (en) * 1980-12-29 1983-07-19 Peterson Associates, Ltd. Rock boring apparatus
US4552232A (en) * 1984-06-29 1985-11-12 Spiral Drilling Systems, Inc. Drill-bit with full offset cutter bodies
US4570725A (en) * 1984-01-31 1986-02-18 Nl Industries, Inc. Drill bit cutter
US4595067A (en) * 1984-01-17 1986-06-17 Reed Tool Company Rotary drill bit, parts therefor, and method of manufacturing thereof
US4611673A (en) * 1980-03-24 1986-09-16 Reed Rock Bit Company Drill bit having offset roller cutters and improved nozzles
DE3539717A1 (de) * 1984-06-29 1987-05-14 Spiral Drilling Systems Inc Rollenmeissel
US4869329A (en) * 1987-04-06 1989-09-26 Smith International, Inc. Rock bit insert
US4887493A (en) * 1988-07-13 1989-12-19 Reed Tool Company Roller cutter drill bit and method of forming
US5201376A (en) * 1992-04-22 1993-04-13 Dresser Industries, Inc. Rock bit with improved gage insert
US5421423A (en) * 1994-03-22 1995-06-06 Dresser Industries, Inc. Rotary cone drill bit with improved cutter insert
US5445231A (en) * 1994-07-25 1995-08-29 Baker Hughes Incorporated Earth-burning bit having an improved hard-faced tooth structure
US5697462A (en) * 1995-06-30 1997-12-16 Baker Hughes Inc. Earth-boring bit having improved cutting structure
US5755301A (en) * 1996-08-09 1998-05-26 Dresser Industries, Inc. Inserts and compacts with lead-in surface for enhanced retention
US5954282A (en) * 1997-02-10 1999-09-21 Britzke; Robert W. Plate for reducing wear by a material flow
US20030136588A1 (en) * 2002-01-24 2003-07-24 David Truax Roller cone drill bit having designed walk characteristics
US20070034411A1 (en) * 2005-08-15 2007-02-15 Smith International, Inc. Rolling cone drill bit having non-circumferentially arranged cutter elements
US7686104B2 (en) 2005-08-15 2010-03-30 Smith International, Inc. Rolling cone drill bit having cutter elements positioned in a plurality of differing radial positions
US20120104127A1 (en) * 2010-10-28 2012-05-03 Mitsubishi Materials Corporation Apparatus for fracturing polycrystalline silicon and method for producing fractured fragments of polycrystalline silicon
WO2014080396A1 (en) * 2012-11-20 2014-05-30 Toolgal Degania Industrial Diamonds Ltd. Chain and chain tool

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2923430A (en) * 1957-09-12 1960-02-02 Filtrox Werk Ag Apparatus for applying and lifting heavy covers on containers
DE1583013B1 (de) * 1967-11-04 1971-12-23 Vnii Burowoj Techniki Bohrrollenmeissel

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US474297A (en) * 1892-05-03 Carl hoffmann
US1010127A (en) * 1909-09-03 1911-11-28 Ernest C Baker Rotary burnishing-tool.
US1502851A (en) * 1922-01-20 1924-07-29 Gale George Washington Magazine rotary drill bit
US1885085A (en) * 1930-11-26 1932-10-25 William F Dalzen Rock drill
US2117679A (en) * 1935-12-27 1938-05-17 Chicago Pneumatic Tool Co Earth boring drill
US2121202A (en) * 1935-03-19 1938-06-21 Robert J Killgore Rotary bit
US2194675A (en) * 1937-04-05 1940-03-26 David C Vance Drill bit
US2234273A (en) * 1940-02-19 1941-03-11 Reed Roller Bit Co Rock bit cutter
US2244617A (en) * 1939-01-14 1941-06-03 Nat Tool Company Roller bit
US2626128A (en) * 1951-09-24 1953-01-20 Reed Roller Bit Co Drill bit

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE652955C (de) * 1934-10-06 1937-11-11 Hughes Tool Co Rollenbohrer fuer drehendes Tiefbohren
US2310289A (en) * 1939-10-23 1943-02-09 Eidco Inc Drill bit
US2318370A (en) * 1940-12-06 1943-05-04 Kasner M Oil well drilling bit

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US474297A (en) * 1892-05-03 Carl hoffmann
US1010127A (en) * 1909-09-03 1911-11-28 Ernest C Baker Rotary burnishing-tool.
US1502851A (en) * 1922-01-20 1924-07-29 Gale George Washington Magazine rotary drill bit
US1885085A (en) * 1930-11-26 1932-10-25 William F Dalzen Rock drill
US2121202A (en) * 1935-03-19 1938-06-21 Robert J Killgore Rotary bit
US2117679A (en) * 1935-12-27 1938-05-17 Chicago Pneumatic Tool Co Earth boring drill
US2194675A (en) * 1937-04-05 1940-03-26 David C Vance Drill bit
US2244617A (en) * 1939-01-14 1941-06-03 Nat Tool Company Roller bit
US2234273A (en) * 1940-02-19 1941-03-11 Reed Roller Bit Co Rock bit cutter
US2626128A (en) * 1951-09-24 1953-01-20 Reed Roller Bit Co Drill bit

Cited By (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2749093A (en) * 1952-09-12 1956-06-05 Reed Roller Bit Co Drill bit
US2774570A (en) * 1954-05-03 1956-12-18 Hughes Tool Co Roller cutter for earth drills
US2774571A (en) * 1954-07-06 1956-12-18 Hughes Tool Co Cone type well drill
US2927778A (en) * 1956-07-05 1960-03-08 Chicago Pneumatic Tool Co Rotary drill cutters
US2990025A (en) * 1958-06-16 1961-06-27 Dresser Ind Bit
US3134447A (en) * 1962-01-31 1964-05-26 Hughes Tool Co Rolling cone rock bit with wraparound spearpoints
US3185228A (en) * 1963-01-21 1965-05-25 Hughes Tool Co Rotary-percussion drill bit with heel row inserts to prevent wedging
US3306381A (en) * 1963-12-16 1967-02-28 Drilco Oil Tools Inc Reaming apparatus
US3412946A (en) * 1964-08-22 1968-11-26 Dorries A G O Comminuting device
US3382940A (en) * 1965-10-21 1968-05-14 Frank E. Stebley Percussion drill bit
US3269470A (en) * 1965-11-15 1966-08-30 Hughes Tool Co Rotary-percussion drill bit with antiwedging gage structure
US3361494A (en) * 1966-08-04 1968-01-02 Hughes Tool Co Journal bearing
US3442342A (en) * 1967-07-06 1969-05-06 Hughes Tool Co Specially shaped inserts for compact rock bits,and rolling cutters and rock bits using such inserts
US3581835A (en) * 1969-05-08 1971-06-01 Frank E Stebley Insert for drill bit and manufacture thereof
US3603414A (en) * 1970-01-30 1971-09-07 Frank E Stebley Insert for drilling unit
US3599737A (en) * 1970-03-02 1971-08-17 Smith International Anchored hardened cutter inserts
US3695723A (en) * 1970-07-28 1972-10-03 Kennametal Inc Abrading tool
US3858670A (en) * 1972-05-08 1975-01-07 Eugene Gray Ott Insert cutter for cutting kerfs
US4108692A (en) * 1975-01-13 1978-08-22 Smith International, Inc. Rock bit roller cutter and method therefor
US4231438A (en) * 1978-10-10 1980-11-04 Smith International, Inc. Straight hole insert drill bit
US4611673A (en) * 1980-03-24 1986-09-16 Reed Rock Bit Company Drill bit having offset roller cutters and improved nozzles
US4393949A (en) * 1980-12-29 1983-07-19 Peterson Associates, Ltd. Rock boring apparatus
US4595067A (en) * 1984-01-17 1986-06-17 Reed Tool Company Rotary drill bit, parts therefor, and method of manufacturing thereof
US4570725A (en) * 1984-01-31 1986-02-18 Nl Industries, Inc. Drill bit cutter
US4552232A (en) * 1984-06-29 1985-11-12 Spiral Drilling Systems, Inc. Drill-bit with full offset cutter bodies
DE3539717A1 (de) * 1984-06-29 1987-05-14 Spiral Drilling Systems Inc Rollenmeissel
WO1987003036A1 (en) * 1985-11-12 1987-05-21 Spiral Drilling Systems, Inc. Drill bit with full offset cutter bodies
US4869329A (en) * 1987-04-06 1989-09-26 Smith International, Inc. Rock bit insert
US4887493A (en) * 1988-07-13 1989-12-19 Reed Tool Company Roller cutter drill bit and method of forming
US5201376A (en) * 1992-04-22 1993-04-13 Dresser Industries, Inc. Rock bit with improved gage insert
US5421423A (en) * 1994-03-22 1995-06-06 Dresser Industries, Inc. Rotary cone drill bit with improved cutter insert
US5445231A (en) * 1994-07-25 1995-08-29 Baker Hughes Incorporated Earth-burning bit having an improved hard-faced tooth structure
US5697462A (en) * 1995-06-30 1997-12-16 Baker Hughes Inc. Earth-boring bit having improved cutting structure
US5755301A (en) * 1996-08-09 1998-05-26 Dresser Industries, Inc. Inserts and compacts with lead-in surface for enhanced retention
US5954282A (en) * 1997-02-10 1999-09-21 Britzke; Robert W. Plate for reducing wear by a material flow
US20030136588A1 (en) * 2002-01-24 2003-07-24 David Truax Roller cone drill bit having designed walk characteristics
US20070034411A1 (en) * 2005-08-15 2007-02-15 Smith International, Inc. Rolling cone drill bit having non-circumferentially arranged cutter elements
US7370711B2 (en) 2005-08-15 2008-05-13 Smith International, Inc. Rolling cone drill bit having non-circumferentially arranged cutter elements
US7686104B2 (en) 2005-08-15 2010-03-30 Smith International, Inc. Rolling cone drill bit having cutter elements positioned in a plurality of differing radial positions
US20120104127A1 (en) * 2010-10-28 2012-05-03 Mitsubishi Materials Corporation Apparatus for fracturing polycrystalline silicon and method for producing fractured fragments of polycrystalline silicon
US8517295B2 (en) * 2010-10-28 2013-08-27 Mitsubishi Materials Corporation Apparatus for fracturing polycrystalline silicon and method for producing fractured fragments of polycrystalline silicon
WO2014080396A1 (en) * 2012-11-20 2014-05-30 Toolgal Degania Industrial Diamonds Ltd. Chain and chain tool

Also Published As

Publication number Publication date
NL71579C (de)
BE510109A (de)
GB715977A (en) 1954-09-22
DE913523C (de) 1954-06-14
FR1052974A (fr) 1954-01-29
CH307229A (de) 1955-05-31
BE510209A (de)

Similar Documents

Publication Publication Date Title
US2687875A (en) Well drill
US2774570A (en) Roller cutter for earth drills
US2990025A (en) Bit
US2774571A (en) Cone type well drill
US3126067A (en) Roller bit with inserts
US5746280A (en) Earth-boring bit having shear-cutting inner row elements
US3269469A (en) Solid head rotary-percussion bit with rolling cutters
US5697462A (en) Earth-boring bit having improved cutting structure
US4148368A (en) Rock bit with wear resistant inserts
US5592995A (en) Earth-boring bit having shear-cutting heel elements
US4056153A (en) Rotary rock bit with multiple row coverage for very hard formations
US6345673B1 (en) High offset bits with super-abrasive cutters
US5323865A (en) Earth-boring bit with an advantageous insert cutting structure
US5752573A (en) Earth-boring bit having shear-cutting elements
CA2220679C (en) Rolling cone bit with gage and off-gage cutter elements positioned to separate sidewall and bottom hole cutting duty
US6601661B2 (en) Secondary cutting structure
US3401759A (en) Heel pack rock bit
US2939684A (en) Cutter for well drills
US2851253A (en) Drill bit
US3134447A (en) Rolling cone rock bit with wraparound spearpoints
US3185228A (en) Rotary-percussion drill bit with heel row inserts to prevent wedging
US2533258A (en) Drill cutter
US2704204A (en) Drill bit for drilling over-size hole
US3130801A (en) Drill bit having inserts forming a reamer
US20160348440A1 (en) Hybrid drill bit