US3747999A - Rotary cutter for earth boring bits - Google Patents

Rotary cutter for earth boring bits Download PDF

Info

Publication number
US3747999A
US3747999A US00224825A US3747999DA US3747999A US 3747999 A US3747999 A US 3747999A US 00224825 A US00224825 A US 00224825A US 3747999D A US3747999D A US 3747999DA US 3747999 A US3747999 A US 3747999A
Authority
US
United States
Prior art keywords
drill bit
shaft
cutter assembly
saddle
assembly according
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
US00224825A
Other languages
English (en)
Inventor
D Justman
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.)
GW Murphy Industries Inc
Original Assignee
GW Murphy Industries 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 GW Murphy Industries Inc filed Critical GW Murphy Industries Inc
Application granted granted Critical
Publication of US3747999A publication Critical patent/US3747999A/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
    • E21B10/08—Roller bits
    • E21B10/10—Roller bits with roller axle supported at both ends

Definitions

  • Another object is to provide a new and improved cutter assembly and support therefor which assembly may be disposed between .cutter support legs of a saddle wherein the bearing shaft may have ends secured to the support to prevent the shaft from turning about its own axis and to prevent or alleviate relative movement between the shaft and the support.
  • a cutter assembly is shown mounted on a steel cutter support or saddle 11.
  • the saddle 11 has a base 12 which may be welded or otherwise secured to a bit head (not shown).
  • the cutter assembly 10 includes a steel rotary cutter 13 which is rotatably mounted on suitable bearings on a bearing shaft 14, as is well known in the art.
  • the saddle 11 includes an inner leg 15 and an outer leg 16.
  • the bearing shaft 14 extends between the legs 15 and 16 and at least one end of the shaft 14 has flat surfaces 17,18 and 19 fitting closely with corresponding flats 17a, 18a and 19a of the leg 16 to hold the shaft 14 against turning on its axis.
  • the shaft 14 has a bore 20 therethrough and lugs 21 and 22 of the leg 16 have bores 23 and 24 aligned with bore 20.
  • a bolt 25 extends through bores 23, 20 and Adjacent the lug 21, the leg 16 has a slot 26 therethrough extending toward the base 12 to a stress relief hole 27. This slot provides some flexibility to the ing 21 by reducing the bending strength thereof so that when the bolt 25 is tightened, the shaft 14 is tightly engaged by the lugs 21 and 22 to prevent rotation of the shaft about its axis and to prevent chattering or hammering between the shaft 14 and the bit leg 16 during the drilling operation.
  • the end of the shaft 14 is here shown as having a rectangular shape, it will be apparent that various configurations may be used, and because the invention provides such a tight fit between the shaft and the leg, it is believed that the end of the shaft could be round and still provide a satisfactory attachment to the saddle leg.
  • slot 26 is shown as being adjacent the leading saddle lug 21 with respect to the direction of rotation of the drill bit, it will be apparent that a slot 26a could be provided adjacent the trailing lug 22 or in some position between the two lugs of the saddle leg,
  • the structure of the preferred embodiment has been successfully proven in actual drilling operations in the field.
  • a drill bit cutter assembly comprising:
  • a saddle having a base and space-apart legs
  • roller cutter rotatably mounted on said shaft between said legs
  • the legs each having an opening into which the ends of said shaft are disposed
  • the said legs having lug portions on the front and rear sides of said shaft with respect to the direction of rotation of the drill bit
  • said saddle having slot means formed therein to provide flexibility to at least one of said lug portions
  • a drill bit cutter-assembly according to claim 1 wherein the means to provide flexibility comprises a slot in the leg near the front lug portion, and a slot in the leg near the rear lug portion.
  • a drill bit cutter assembly according to claim 1 wherein an end of saidbearing shaft -is rectangular in cross section.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Drilling Tools (AREA)
US00224825A 1972-02-09 1972-02-09 Rotary cutter for earth boring bits Expired - Lifetime US3747999A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US22482572A 1972-02-09 1972-02-09

Publications (1)

Publication Number Publication Date
US3747999A true US3747999A (en) 1973-07-24

Family

ID=22842380

Family Applications (1)

Application Number Title Priority Date Filing Date
US00224825A Expired - Lifetime US3747999A (en) 1972-02-09 1972-02-09 Rotary cutter for earth boring bits

Country Status (6)

Country Link
US (1) US3747999A (enrdf_load_html_response)
JP (1) JPS5526270B2 (enrdf_load_html_response)
CA (1) CA964678A (enrdf_load_html_response)
DE (1) DE2251770C2 (enrdf_load_html_response)
SE (1) SE392498B (enrdf_load_html_response)
ZA (1) ZA724119B (enrdf_load_html_response)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4004644A (en) * 1975-01-27 1977-01-25 Sandvik Aktiebolag Roller cutter
US4089382A (en) * 1977-04-04 1978-05-16 Hughes Tool Company Cutter mounting for a large hole earth boring bit
US4241799A (en) * 1979-10-17 1980-12-30 Hughes Tool Company Protected cutter mounting for drill bits
US4760890A (en) * 1987-05-18 1988-08-02 Tamrock Inc. Cutter assembly for rotary boring of earth
CN114837558A (zh) * 2022-05-27 2022-08-02 重庆交通大学 一种基于凿岩台车的异形孔定向开槽刀头套具

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4202078C2 (de) * 1992-01-25 1997-05-28 Audi Ag Lageranordnung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1444074A (en) * 1922-04-20 1923-02-06 Hughes Tool Co Cross-roller drill
US3601207A (en) * 1969-05-19 1971-08-24 Lawrence Mfg Co Cutter assembly

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1444074A (en) * 1922-04-20 1923-02-06 Hughes Tool Co Cross-roller drill
US3601207A (en) * 1969-05-19 1971-08-24 Lawrence Mfg Co Cutter assembly

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4004644A (en) * 1975-01-27 1977-01-25 Sandvik Aktiebolag Roller cutter
US4089382A (en) * 1977-04-04 1978-05-16 Hughes Tool Company Cutter mounting for a large hole earth boring bit
DE2812195A1 (de) * 1977-04-04 1978-10-12 Hughes Tool Co Fraeserbefestigung an einem erdbohrer fuer bohrloecher grossen durchmessers
FR2396157A1 (fr) * 1977-04-04 1979-01-26 Hughes Tool Co Trepan avec fraises montees pour le forage d'un trou a grand diametre
US4241799A (en) * 1979-10-17 1980-12-30 Hughes Tool Company Protected cutter mounting for drill bits
US4760890A (en) * 1987-05-18 1988-08-02 Tamrock Inc. Cutter assembly for rotary boring of earth
CN114837558A (zh) * 2022-05-27 2022-08-02 重庆交通大学 一种基于凿岩台车的异形孔定向开槽刀头套具

Also Published As

Publication number Publication date
JPS4888703A (enrdf_load_html_response) 1973-11-20
DE2251770C2 (de) 1982-04-15
DE2251770A1 (de) 1973-08-16
CA964678A (en) 1975-03-18
ZA724119B (en) 1973-03-28
SE392498B (sv) 1977-03-28
JPS5526270B2 (enrdf_load_html_response) 1980-07-11

Similar Documents

Publication Publication Date Title
US3612196A (en) Rock-boring cutter
US3830321A (en) Excavating tool and a bit for use therewith
US3331637A (en) Cutter bits and mounting means therefor
US3747999A (en) Rotary cutter for earth boring bits
KR870001894A (ko) 저합금강 대형로우터의 수리방법
US4333364A (en) Method for manufacturing a rotary drill bit having a solid forged, unitary body
US3981370A (en) Disc cutting unit for use on rock boring machines
US4256194A (en) Rotary drill bit having a solid forged, unitary body
US4793427A (en) Disc cutters for rock working machines
US2648526A (en) Rotary earth boring bit
US3749188A (en) Drill bit
US3756332A (en) Disc type center cutter for a boring machine
US3971600A (en) Drill bit
US4168923A (en) Electron beam welding of carbide inserts
US3870370A (en) Universal saddle mounting for fixed and rolling cutters
US3910367A (en) Crawler tractor oscillating beam mounting
CN207857917U (zh) 一种钻削孔的工具
US4448271A (en) Earth boring device
US3163081A (en) Right angle milling head
US3786879A (en) Drill bit
CN205577847U (zh) 天井钻机用滚刀座键销组合定位结构
US930436A (en) Boring-tool.
US1692919A (en) Disk-drill bit
CN211939074U (zh) 一种镗杆主轴支撑套及镗床
US2189032A (en) Reamer