SE0002477D0 - Rock drill bit - Google Patents

Rock drill bit

Info

Publication number
SE0002477D0
SE0002477D0 SE0002477A SE0002477A SE0002477D0 SE 0002477 D0 SE0002477 D0 SE 0002477D0 SE 0002477 A SE0002477 A SE 0002477A SE 0002477 A SE0002477 A SE 0002477A SE 0002477 D0 SE0002477 D0 SE 0002477D0
Authority
SE
Sweden
Prior art keywords
peripheral
drill bit
skirt
pins
cavity
Prior art date
Application number
SE0002477A
Other languages
Swedish (sv)
Other versions
SE0002477L (en
SE521935C2 (en
Inventor
Karl Ingmarsson
Stig-Aake Brolund
Original Assignee
Sandvik 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 Sandvik Ab filed Critical Sandvik Ab
Priority to SE0002477A priority Critical patent/SE521935C2/en
Publication of SE0002477D0 publication Critical patent/SE0002477D0/en
Publication of SE0002477L publication Critical patent/SE0002477L/en
Publication of SE521935C2 publication Critical patent/SE521935C2/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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

Abstract

The drill bit skirt (20) contains a concave peripheral cavity (23) whose front end is adjacent to a web (22) located in a region (X) defined between two planes (26, 27) coincidental with the front and rear axial ends of the peripheral pins (19). A rock drill bit (11) for percussion drilling, especially for a water-driven sinking drill hammer, comprises a shaft, a drill head (16) at the front end of the shaft, an elongated mantle surface or skirt, and a number of hard metal pins mounted in the front face (17) of the drill head, and peripheral pins (19) mounted in a peripheral flange. The skirt contains a concave peripheral cavity for reducing its rear axial diameter. The front of the cavity is adjacent to a web located in a region defined between two planes coincidental with the front and rear axial ends of the peripheral pins.
SE0002477A 2000-06-30 2000-06-30 Rock drill bit for percussion drilling, has skirt with concave peripheral cavity whose front end is adjacent to a web SE521935C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE0002477A SE521935C2 (en) 2000-06-30 2000-06-30 Rock drill bit for percussion drilling, has skirt with concave peripheral cavity whose front end is adjacent to a web

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE0002477A SE521935C2 (en) 2000-06-30 2000-06-30 Rock drill bit for percussion drilling, has skirt with concave peripheral cavity whose front end is adjacent to a web

Publications (3)

Publication Number Publication Date
SE0002477D0 true SE0002477D0 (en) 2000-06-30
SE0002477L SE0002477L (en) 2001-12-31
SE521935C2 SE521935C2 (en) 2003-12-23

Family

ID=20280324

Family Applications (1)

Application Number Title Priority Date Filing Date
SE0002477A SE521935C2 (en) 2000-06-30 2000-06-30 Rock drill bit for percussion drilling, has skirt with concave peripheral cavity whose front end is adjacent to a web

Country Status (1)

Country Link
SE (1) SE521935C2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL3760828T3 (en) 2019-07-05 2022-06-20 Sandvik Mining And Construction Tools Ab Drill bit

Also Published As

Publication number Publication date
SE0002477L (en) 2001-12-31
SE521935C2 (en) 2003-12-23

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