EP 0452584 B1 19940629 - Nozzle means for rotary drill bits.
Title (en)
Nozzle means for rotary drill bits.
Title (de)
Düse für Drehbohrmeissel.
Title (fr)
Duse pour trépans de forage rotatifs.
Publication
Application
Priority
US 50204690 A 19900330
Abstract (en)
[origin: EP0452584A1] A rotary drill bit (10) has fluid discharge nozzles (36A, 36B, 36C) positioned between adjacent pairs of roller cutters (20A, 20B, 20C). A fluid discharge nozzle (36A) provides a stream of drilling fluid (44) toward an adjacent roller cutter (20A) inclined radially outwardly toward the side wall (34) of the bore hole (30) and slanted toward the roller cutter (20A) for first striking the side wall (34), and then sweeping inwardly across the bore hole bottom (32) in a flat high velocity stream tangential to bit rotation and beneath the cutting elements (26) during cutting engagement of the gage row (28D) with the formation. <IMAGE>
IPC 1-7
IPC 8 full level
E21B 10/18 (2006.01)
CPC (source: EP)
E21B 10/18 (2013.01)
Citation (examination)
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
EP 0452584 A1 19911023; EP 0452584 B1 19940629; CA 2022495 A1 19911001; CA 2022495 C 19970930; DE 69010320 D1 19940804; DE 69010320 T2 19941222
DOCDB simple family (application)
EP 90308487 A 19900801; CA 2022495 A 19900801; DE 69010320 T 19900801