EP 0843072 B1 20030702 - Drill tip for soil drilling apparatus
Title (en)
Drill tip for soil drilling apparatus
Title (de)
Bohrerspitze für Erdbohrvorrichtungen
Title (fr)
Pointe de forage pour dispositif de forage du sol
Publication
Application
Priority
NL 1004537 A 19961114
Abstract (en)
[origin: EP0843072A1] The bit (1) has a lateral area (4) and couplings (9) to connect to the boring equipment. The lateral area runs away from the couplings. Along part of the lateral area there is at least one spiral groove (5). The lateral area forms a convex boundary of at least one longitudinal section of the bit. The lateral area may also form a convex boundary of another longitudinal section of the bit at right-angles to the first. Preferably, the whole lateral area is convex. Each groove begins at a distance from the free end (3) of the bit turned away from the couplings, and extends towards the couplings.
IPC 1-7
IPC 8 full level
E21B 10/44 (2006.01)
CPC (source: EP)
E02D 5/72 (2013.01); E21B 10/44 (2013.01)
Designated contracting state (EPC)
BE CH DE LI NL
DOCDB simple family (publication)
EP 0843072 A1 19980520; EP 0843072 B1 20030702; DE 59710371 D1 20030807; NL 1004537 C2 19980518
DOCDB simple family (application)
EP 97203540 A 19971113; DE 59710371 T 19971113; NL 1004537 A 19961114