EP 0944764 A1 19990929 - DRILLING HEAD
Title (en)
DRILLING HEAD
Title (de)
BOHRKOPF
Title (fr)
TETE DE FORAGE
Publication
Application
Priority
- BE 9700135 W 19971216
- BE 9601043 A 19961216
Abstract (en)
[origin: WO9827310A1] The invention concerns a drilling head of the type used in particular for boring oil wells, comprising a central body (2), cutting blades (3) projecting from the body (2), both in front of it in a drilling direction and on the sides of this same body (2), and cutting elements (9) in each blade (3) distributed over a front external surface (10) and on a lateral external surface (11) for calibrating the well. In this drilling head are arranged as cutting elements: in a central zone (13) of the front surface (10), on at least one blade (3): at least one cutting tip (12) in synthetic polycrystalline diamond compact, and in a remaining zone (14) of the front surface (10) of this blade, located beyond said central zone (13) relative to the rotation axis, and on the other blades: thermoresistant synthetic diamonds and/or impregnated diamond particles.
IPC 1-7
IPC 8 full level
E21B 10/46 (2006.01); E21B 10/54 (2006.01)
CPC (source: EP US)
E21B 10/46 (2013.01 - EP US); E21B 10/54 (2013.01 - EP US)
Citation (search report)
See references of WO 9827310A1
Designated contracting state (EPC)
BE DE FR GB IT NL
DOCDB simple family (publication)
WO 9827310 A1 19980625; BE 1010802 A3 19990202; CA 2274918 A1 19980625; CA 2274918 C 20060509; DE 69720035 D1 20030424; DE 69720035 T2 20040401; EP 0944764 A1 19990929; EP 0944764 B1 20030319; NO 326453 B1 20081208; NO 992906 D0 19990614; NO 992906 L 19990813; US 6296069 B1 20011002
DOCDB simple family (application)
BE 9700135 W 19971216; BE 9601043 A 19961216; CA 2274918 A 19971216; DE 69720035 T 19971216; EP 97949845 A 19971216; NO 992906 A 19990614; US 31955999 A 19990719