CA2248688A1 - Rock drill bit and a rock drilling tool - Google Patents

Rock drill bit and a rock drilling tool

Info

Publication number
CA2248688A1
CA2248688A1 CA002248688A CA2248688A CA2248688A1 CA 2248688 A1 CA2248688 A1 CA 2248688A1 CA 002248688 A CA002248688 A CA 002248688A CA 2248688 A CA2248688 A CA 2248688A CA 2248688 A1 CA2248688 A1 CA 2248688A1
Authority
CA
Canada
Prior art keywords
inserts
rock
drill bit
surface portion
drilling tool
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.)
Granted
Application number
CA002248688A
Other languages
French (fr)
Other versions
CA2248688C (en
Inventor
Per-Olof Liljebrand
Urban Olsson
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.)
Sandvik Intellectual Property AB
Original Assignee
Individual
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
Priority claimed from SE9600983A external-priority patent/SE508490C2/en
Application filed by Individual filed Critical Individual
Publication of CA2248688A1 publication Critical patent/CA2248688A1/en
Application granted granted Critical
Publication of CA2248688C publication Critical patent/CA2248688C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
  • Percussive Tools And Related Accessories (AREA)

Abstract

A rock drill bit for percussive drilling comprising a head portion (1) with a front surface which has a number of inserts (7) provided in a peripheral ring, and a number of front inserts (9, 10) placed radially inside the peripheral inserts. At least a first surface portion (4) is provided on the front surface, which is recessed at a certain depth in relation to a surrounding second surface portion (5). One or more channels (12) for feed of flush medium to cool inserts and convey away drill cuttings between the drill bit and a bore wall terminates in the front surface.
The second surface portion (5) is a part of an endless land portion which delimits and wholly surrounds the recessed space in connection to the first surface portion (4) in order to always retain a cushion of flush medium in this space for the purpose of flushing in a versatile manner and cooling said from inserts (9, 10).
The present invention also relates to a rock-drilling tool for percussive drilling.
CA002248688A 1996-03-14 1997-02-20 Rock drill bit and a rock drilling tool Expired - Lifetime CA2248688C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9600983-2 1996-03-14
SE9600983A SE508490C2 (en) 1996-03-14 1996-03-14 Rock drill bit for striking drilling
PCT/SE1997/000285 WO1997034072A1 (en) 1996-03-14 1997-02-20 Rock drill bit and a rock drilling tool

Publications (2)

Publication Number Publication Date
CA2248688A1 true CA2248688A1 (en) 1997-09-18
CA2248688C CA2248688C (en) 2006-07-04

Family

ID=36648527

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002248688A Expired - Lifetime CA2248688C (en) 1996-03-14 1997-02-20 Rock drill bit and a rock drilling tool

Country Status (1)

Country Link
CA (1) CA2248688C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104594811A (en) * 2013-10-31 2015-05-06 赵兵 Rock water drilling machine row-hole drill bit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104594811A (en) * 2013-10-31 2015-05-06 赵兵 Rock water drilling machine row-hole drill bit

Also Published As

Publication number Publication date
CA2248688C (en) 2006-07-04

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Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry

Effective date: 20170220