EP 0512330 B1 19960918 - Drill bit
Title (en)
Drill bit
Title (de)
Bohrmeissel
Title (fr)
Outil de forage
Publication
Application
Priority
SU 4928471 A 19910506
Abstract (en)
[origin: EP0512330A1] The drill bit according to the invention contains a body (1) to which rock-destroying members - rollers (2) - are fastened. A unit for generating hydrodynamic waves is arranged in the body (1). The unit is designed in the form of a swirl chamber (3) with tangentially arranged inlet passages (4) and with a conically tapering outlet passage (5), the end face of which is rounded off radially. <IMAGE>
IPC 1-7
IPC 8 full level
E21B 7/18 (2006.01); E21B 7/24 (2006.01); E21B 10/18 (2006.01); E21B 10/60 (2006.01)
CPC (source: EP US)
E21B 7/18 (2013.01 - EP US); E21B 7/24 (2013.01 - EP US); E21B 10/18 (2013.01 - EP US)
Designated contracting state (EPC)
DE GB IT
DOCDB simple family (publication)
EP 0512330 A1 19921111; EP 0512330 B1 19960918; CA 2068005 A1 19921107; CA 2068005 C 19980825; DE 59207153 D1 19961024; JP 2610749 B2 19970514; JP H06257367 A 19940913; US 5303784 A 19940419
DOCDB simple family (application)
EP 92106952 A 19920423; CA 2068005 A 19920505; DE 59207153 T 19920423; JP 11381592 A 19920506; US 87847492 A 19920505