US3921734A - Raise boring head and rolling cutter arrangement therefor - Google Patents

Raise boring head and rolling cutter arrangement therefor Download PDF

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Publication number
US3921734A
US3921734A US300353A US30035372A US3921734A US 3921734 A US3921734 A US 3921734A US 300353 A US300353 A US 300353A US 30035372 A US30035372 A US 30035372A US 3921734 A US3921734 A US 3921734A
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US
United States
Prior art keywords
slot
cutters
support shaft
leg
bottom wall
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
US300353A
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English (en)
Inventor
Robert D Goodfellow
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.)
Kennametal Inc
Original Assignee
Kennametal Inc
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 Kennametal Inc filed Critical Kennametal Inc
Priority to US300353A priority Critical patent/US3921734A/en
Priority to GB2401075A priority patent/GB1421260A/en
Priority to GB4652673A priority patent/GB1421259A/en
Priority to ZA737797*A priority patent/ZA737797B/xx
Priority to AU61259/73A priority patent/AU479140B2/en
Priority to CA183,506A priority patent/CA1010019A/en
Priority to JP11627573A priority patent/JPS5611838B2/ja
Publication of USB300353I5 publication Critical patent/USB300353I5/en
Application granted granted Critical
Publication of US3921734A publication Critical patent/US3921734A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/28—Enlarging drilled holes, e.g. by counterboring
    • 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
    • E21B10/10—Roller bits with roller axle supported at both ends
    • 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

  • ABSTRACT A raise boring head which includes a plurality of rolling cutters distributed over the head and including circumferentially spaced gauge cutters. Each cutter has a rotatable part and a support shaft supporting the rotatable part with the ends of the support shafts carried in saddles fixed to the body of the raise boring head.
  • each support shaft is formed to a rectangular shape and fits into a rectangular slot in the respective saddle and is secured therein as by bolts.
  • the radially outer sides of the saddles for the gauge cutters are provided with hard wear resistant inserts to reduce the wear thereon.
  • the present invention relates to excavating equipment, and is particularly concerned with a reamer. or raise boring head, of substantial size and two rolling cutter arrangements therefor and support saddles for the rolling cutters.
  • a reamer. or raise boring head of the type with which the present invention is concerned comprises a support structure of substantial size having a stem connected thereto and about the middle and projecting axially therefrom in a direction substantially perpendicular to the plane of the support structure.
  • the stem is adapted for connection to a drill string for being rotated thereby while being pulled in the direction of the axis of the stem.
  • Supported on the support structure are rolling cutters in circumferentially and distributed relation with each rolling cutter comprising a rotatable outer part and a supporting cylindrical shaft which is detachably connected to a saddle mounted on the support structure.
  • the rolling cutters of an arrangement of the nature described are subjected to extreme abuse because the rolling cutters are required to reduce rock and the like and the rotary outer parts of the rolling cutters and the bearings thereof will, at times, have a high failure rate. It is, therefore, important to be able to change the cutters relatively easily while, at the same time, providing firm support therefor on the support structure of the reamer, or raise boring head.
  • a primary object of the present invention is the provision of an improved arrangement for supporting the rolling cutters on the support structure of a reamer, or raise boring head.
  • Another object is the provision of a supporting arrangement for the rolling cutters which permits rapid and easy replacement thereof.
  • Still another object of the present invention is the provision of wear resistant material on the outermost ends of the outermost supports for the rolling cutters to inhibit abrasion thereof while the reamer, or raise boring head, is in service.
  • FIG. 1 is a somewhat schematic view looking down on top of a raise boring head and showing the distribution on the head of the rolling cutters which engage the formation being reduced.
  • FIG. 2 is a side elevational view of one of the rolling cutters of FIG. 1, together with the supporting saddle therefor, and, more specifically. one of the gauge cutters.
  • FIG. 3 is an end view looking in at the cutter and saddle combination of FIG. 2 from the end that is presented radially outwardly when the cutter is mounted on the raise boring head.
  • FIG. 4 is an exploded perspective view showing the support shaft for a rolling cutter and the saddle in which the shaft is mounted.
  • FIG. 5 is a fragmentary perspective view showing an arrangement wherein a roll pin holds the shaft of the rolling cutter in the saddle at one end.
  • FIG. 6 is a fragmentary view drawn at enlarged scale andshowing a wear resistant insert in one end ofa saddle.
  • a generally platelike, or somewhat conical, support structure having a central stern projecting axially therefrom in a direction perpendicular to the plane of the support structure and adapted for connection to a drill string for receiving thrust and rotating effort therefrom.
  • each rolling cutter comprises a rotary outer part and a central support shaft on which the outer part is journaled on the support shaft having end parts receivable in the slots in the legs.
  • Bolts extending diametrally through the ends of the support shaft are threadedly connected to the legs of the saddles and retain the rolling cutters on the saddles firmly, but in such a manner that the rolling cutters can easily be removed from the saddles.
  • FIG. 1 schematically illustrates a raise boring head which will be seen to consist of a plate-like support structure 10 having a stem 12 upstanding therefrom at about the center for connection to a drill string.
  • Support structure 10 is perpendicular to the axis of stem 12 and carries in radially and circumferentially distributed relation a plurality of rolling cutters, each mounted in a support saddle that is fixed to the support structure.
  • the rolling cutters in FIG. 1 consist of a pair ofinnermost cutters 14, a set of cutters 16 positioned radially outwardly from cutters l4 and distributed angularly relative thereto, a further set of cutters l8 radially outwardly from cutters l6 and distributed angularly thereto, and outermost cutters 20 which are generally in alignment with cutters l4 and 16 and all of which are about the same radial distance from the axis of stem I2.
  • the cutters 20 are referred to as gauge cutters because they determine the diameter of the shaft which is formed when the cutter head is rotated while simultaneously being pulled in the direction of the stem I2, usually upwardly, against a formation to be reduced.
  • gauge cutters 20 is shown more in detail in FIGS. 2 and 3, wherein it will be seen to comprise a rotatable outer sleeve-like part 22, advantageously made wear resistant as by the provision of carbide inserts. (not shown), and having a central shaft 24 on which the outer part 22 is journaled as by antifriction bearings. Shaft 24 is mounted in a saddle 26 and is fixed therein for firm support of the part 22 of the rolling cutter.
  • saddle 26 has legs 27 and 29 and on the side thereof which faces radially outwardly of the rolling cutter head, namely, on the radially outer side of the radially outer leg, is provided with cemented hard metal carbide inserts 28, cemented tungsten carbide, for example, which impart abrasion resistance to that end of the saddle which is most exposed to abrasion in use.
  • cemented hard metal carbide inserts 28 cemented tungsten carbide, for example, which impart abrasion resistance to that end of the saddle which is most exposed to abrasion in use.
  • Reference to FIG. 2 will show that the radially outer side of leg 27 is radially within the limits of the outer part 22 of the respective cutter and that the leg is inclined so as to diverge from the axis of stem 12 in the upward direction.
  • shaft 24 will be seen to have a generally squared end at one end and a generally squared end 32 at the other end.
  • generally squared is meant that the shaft is shaped so as to have angularly related flat sides thereon.
  • Portion 30 is receivable in vertical slot 34 formed in leg 27 at one end of saddle 26 and portion 32 is receivable in slot 36 formed in leg 29 at the other end of the saddle.
  • the slots 34 and 36 have flat side walls and a flat bottom wall and are of such a width as closely to receive between the side walls thereof the respective one of the portions 30, 32 thereby assisting in holding shaft 24 against rotation.
  • Leg 27 of saddle 26, beneath the bottom of slot 34, is formed with a hole 38 for receiving a barrel nut 40 formed with a transverse tapped hole 42 which registers with holes 44 in the saddle when the barrel nut is in place. Holes 44 also register with a hole 46 formed in portion 30 and through these holes.
  • two holes 50 are provided in leg 29 for receiving the barrel nuts 52 and which barrel nuts 52 have threaded holes 54 to receive the cap screws 56 that are insertable through holes 58 in portion 32 and holes 60 in the saddle so that portion 32 of the shaft can also be fixedly clamped to respective leg of the saddle.
  • FIG. 4 will also show that the carbide inserts 28 are mounted in holes 62 provided therefor in the radially outwardly facing side ofthe leg at the radially outer end of saddle 26. These inserts are either pressed, cemented or brazed in the respective holes and advantageously protrude a short distance outwardly from the end of the saddle so as to be effective in preventing the end of the saddle from being abraded.
  • FIG. 6 shows at about full scale a typical insert 28 as mounted in the saddle end.
  • the saddle arrangement illustrated in FIGS. 2, 3 and 4 is of merit in respect of rolling cutters because it is easy to change the rolling cutters without dismounting the saddle from support structure 10.
  • the saddles can, thus, be welded to the support structure and remain in place thereon and the rolling cutters that are carried by the saddles can be removed and replaced as necessary as the rolling cutters become dull. or break, or in case the bearings fail therein, or for any other reason.
  • the cutters at 14 have their axes substantially horizontal so that there is not as much loading of these cut,- ters in a direction to impose stresses on the radially inner end of the shaft as in the case with the othercutters and the roll pin arrangement 64 of FIGS has proved to be quite satisfactory for cutters in the position referred to.
  • each saddle has the legs at the ends integralwith a base member, but the legs could, if desired, be welded individually to the support structure:
  • a rolling cutter a rotatable outer part, a central support shaft rotatably supporting said outer part and having end portions projecting axially beyond the respective ends of said outer part, saddle means having generally parallel legs fixed relative to each other and. spaced to receive said rotatable part therebetween, a
  • each said leg part extending into one end of each said leg part and a each having spaced parallel side walls and abottom wall perpendicular to the side walls.
  • each end portion of said central support shaft being receivable into a respective slot and having flat parallel sides engaging the side walls of the slot and a flat bottom perpendicular to said sides and engaging the bottom wall of the respective slot,
  • each said leg having at least one hole extending therethrough in a direction substantially parallel to and the said hole in which the barrel nut is mounted and threadedly engaging the barrel nut whereby each said end portion is fixed in the respective slot and clamped against the bottom wall thereof.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
  • Drilling And Boring (AREA)
US300353A 1972-10-17 1972-10-17 Raise boring head and rolling cutter arrangement therefor Expired - Lifetime US3921734A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US300353A US3921734A (en) 1972-10-17 1972-10-17 Raise boring head and rolling cutter arrangement therefor
GB4652673A GB1421259A (en) 1972-10-17 1973-10-05 Rolling cutters
ZA737797*A ZA737797B (en) 1972-10-17 1973-10-05 Raise boring head and rolling cutter arrangement therefor
GB2401075A GB1421260A (en) 1972-10-17 1973-10-05 Cutter head
AU61259/73A AU479140B2 (en) 1972-10-17 1973-10-11 Raise boring head and rolling cutter arrangement therefor
CA183,506A CA1010019A (en) 1972-10-17 1973-10-16 Raise boring head and rolling cutter arrangement therefor
JP11627573A JPS5611838B2 (enrdf_load_stackoverflow) 1972-10-17 1973-10-16

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US300353A US3921734A (en) 1972-10-17 1972-10-17 Raise boring head and rolling cutter arrangement therefor

Publications (2)

Publication Number Publication Date
USB300353I5 USB300353I5 (enrdf_load_stackoverflow) 1975-01-28
US3921734A true US3921734A (en) 1975-11-25

Family

ID=23158746

Family Applications (1)

Application Number Title Priority Date Filing Date
US300353A Expired - Lifetime US3921734A (en) 1972-10-17 1972-10-17 Raise boring head and rolling cutter arrangement therefor

Country Status (5)

Country Link
US (1) US3921734A (enrdf_load_stackoverflow)
JP (1) JPS5611838B2 (enrdf_load_stackoverflow)
CA (1) CA1010019A (enrdf_load_stackoverflow)
GB (2) GB1421259A (enrdf_load_stackoverflow)
ZA (1) ZA737797B (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4049067A (en) * 1975-11-05 1977-09-20 Ingersoll-Rand Company Cutter mounting extension apparatus
US4142593A (en) * 1977-10-25 1979-03-06 Smith International, Inc. Raise drill inner yoke bridge
US4241799A (en) * 1979-10-17 1980-12-30 Hughes Tool Company Protected cutter mounting for drill bits
US4630693A (en) * 1985-04-15 1986-12-23 Goodfellow Robert D Rotary cutter assembly
US4760890A (en) * 1987-05-18 1988-08-02 Tamrock Inc. Cutter assembly for rotary boring of earth
US6708786B2 (en) * 2001-05-08 2004-03-23 Smith International, Inc. Mounting attachment and bearing system for an industrial earth-boring cutter
US20140102740A1 (en) * 2012-10-12 2014-04-17 Caterpillar Inc. Front Head Nut Pocket Configuration for Hydraulic Hammer
US8973909B2 (en) 2013-08-01 2015-03-10 Hendrickson Usa, L.L.C. Cross arm bushing assembly useful for vehicle suspension
USD934056S1 (en) * 2017-11-21 2021-10-26 Iron Grip Holdings Pty Limited Stabilisation ring segment for an underground reamer

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4508184A (en) 1983-05-27 1985-04-02 Hansen Michael S Roller reamer/stabilizer
JP6603594B2 (ja) * 2016-02-12 2019-11-06 シャープ株式会社 音声信号送信装置、音声信号送信方法、制御プログラム、およびコンピュータ読み取り可能な記録媒体
CN106440548A (zh) * 2016-11-11 2017-02-22 珠海格力电器股份有限公司 一种分液头及空调

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2695771A (en) * 1951-05-04 1954-11-30 Grant Oil Tool Company Tool for removing material from well bore walls
US3385385A (en) * 1966-04-01 1968-05-28 Reed Roller Bit Co Drill bit
US3461983A (en) * 1967-06-28 1969-08-19 Dresser Ind Cutting tool having hard insert in hole surrounded by hard facing
US3601207A (en) * 1969-05-19 1971-08-24 Lawrence Mfg Co Cutter assembly
US3638740A (en) * 1970-03-30 1972-02-01 Murphy Ind Inc G W Raise drilling bit
US3705635A (en) * 1971-01-13 1972-12-12 Dresser Ind Large diameter earth boring bit
US3749188A (en) * 1971-08-20 1973-07-31 G W Murphy Indu Inc Drill bit
US3750772A (en) * 1971-06-28 1973-08-07 Mcdonnell P Ltd Rotary cutters

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5017001A (enrdf_load_stackoverflow) * 1973-06-12 1975-02-22

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2695771A (en) * 1951-05-04 1954-11-30 Grant Oil Tool Company Tool for removing material from well bore walls
US3385385A (en) * 1966-04-01 1968-05-28 Reed Roller Bit Co Drill bit
US3461983A (en) * 1967-06-28 1969-08-19 Dresser Ind Cutting tool having hard insert in hole surrounded by hard facing
US3601207A (en) * 1969-05-19 1971-08-24 Lawrence Mfg Co Cutter assembly
US3638740A (en) * 1970-03-30 1972-02-01 Murphy Ind Inc G W Raise drilling bit
US3705635A (en) * 1971-01-13 1972-12-12 Dresser Ind Large diameter earth boring bit
US3750772A (en) * 1971-06-28 1973-08-07 Mcdonnell P Ltd Rotary cutters
US3749188A (en) * 1971-08-20 1973-07-31 G W Murphy Indu Inc Drill bit

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4049067A (en) * 1975-11-05 1977-09-20 Ingersoll-Rand Company Cutter mounting extension apparatus
US4142593A (en) * 1977-10-25 1979-03-06 Smith International, Inc. Raise drill inner yoke bridge
US4241799A (en) * 1979-10-17 1980-12-30 Hughes Tool Company Protected cutter mounting for drill bits
US4630693A (en) * 1985-04-15 1986-12-23 Goodfellow Robert D Rotary cutter assembly
US4760890A (en) * 1987-05-18 1988-08-02 Tamrock Inc. Cutter assembly for rotary boring of earth
US6708786B2 (en) * 2001-05-08 2004-03-23 Smith International, Inc. Mounting attachment and bearing system for an industrial earth-boring cutter
US20140102740A1 (en) * 2012-10-12 2014-04-17 Caterpillar Inc. Front Head Nut Pocket Configuration for Hydraulic Hammer
US9279232B2 (en) * 2012-10-12 2016-03-08 Caterpillar Inc. Front head nut pocket configuration for hydraulic hammer
US8973909B2 (en) 2013-08-01 2015-03-10 Hendrickson Usa, L.L.C. Cross arm bushing assembly useful for vehicle suspension
USD934056S1 (en) * 2017-11-21 2021-10-26 Iron Grip Holdings Pty Limited Stabilisation ring segment for an underground reamer

Also Published As

Publication number Publication date
ZA737797B (en) 1974-08-28
JPS5611838B2 (enrdf_load_stackoverflow) 1981-03-17
JPS4974101A (enrdf_load_stackoverflow) 1974-07-17
GB1421259A (en) 1976-01-14
GB1421260A (en) 1976-01-14
USB300353I5 (enrdf_load_stackoverflow) 1975-01-28
CA1010019A (en) 1977-05-10
AU6125973A (en) 1975-04-17

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