GB791729A - Improvements in rock drills - Google Patents

Improvements in rock drills

Info

Publication number
GB791729A
GB791729A GB18800/56A GB1880056A GB791729A GB 791729 A GB791729 A GB 791729A GB 18800/56 A GB18800/56 A GB 18800/56A GB 1880056 A GB1880056 A GB 1880056A GB 791729 A GB791729 A GB 791729A
Authority
GB
United Kingdom
Prior art keywords
crown
pilot
spaced
cutting inserts
june
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
Application number
GB18800/56A
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.)
Hellefors Bruks AB
Original Assignee
Hellefors Bruks AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hellefors Bruks AB filed Critical Hellefors Bruks AB
Publication of GB791729A publication Critical patent/GB791729A/en
Expired legal-status Critical Current

Links

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
    • E21B10/56—Button-type inserts
    • 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
    • E21B10/36—Percussion drill bits
    • E21B10/40—Percussion drill bits with leading portion
    • 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
    • E21B10/58—Chisel-type inserts

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)

Abstract

791,729. Percussive drills. HELLEFORS BRUKS AKTIEBOLAG. June 18, 1956 [June 17, 1955], No. 18800/56. Class 124. A reaming drill bit having a drill crown and a pilot coaxial with the drill rod has cutting inserts arranged in the crown in at least two concentric circles, the inner circle being spaced from the pilot and each succeeding outer circle spaced radially from its inner neighbour, the edges of the cutting inserts lying at an angle to their instantaneous direction of travel. As shown, a crown 1 having two radially spaced concentric circles of cutting inserts 20, 21, has, threaded into a bore 2, a part 5 carrying a pilot 6 provided with flanges 9 and a circumferential notch 11, a drill rod being screwed into a bore in the part 5. The inserts may be cylindrical bodies with their longitudinal axes parallel to the longitudinal axis of the crown and their cutting edges lying at an angle between 45 and 90 degrees to their direction of travel.
GB18800/56A 1955-06-17 1956-06-18 Improvements in rock drills Expired GB791729A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE791729X 1955-06-17

Publications (1)

Publication Number Publication Date
GB791729A true GB791729A (en) 1958-03-12

Family

ID=20339685

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18800/56A Expired GB791729A (en) 1955-06-17 1956-06-18 Improvements in rock drills

Country Status (1)

Country Link
GB (1) GB791729A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4630694A (en) * 1985-10-16 1986-12-23 Walton Paul G Integral blade hole opener

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4630694A (en) * 1985-10-16 1986-12-23 Walton Paul G Integral blade hole opener

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