Global Patent Index - EP 1399640 A1

EP 1399640 A1 20040324 - ROCK DRILLING TOOL, A RING DRILL BIT AND AN ADAPTER FOR PERCUSSIVE DRILLING

Title (en)

ROCK DRILLING TOOL, A RING DRILL BIT AND AN ADAPTER FOR PERCUSSIVE DRILLING

Title (de)

STEINBOHRWERKZEUG, RINGBOHRER UND ADAPTER FÜR SCHLAGBOHREN

Title (fr)

OUTIL DE FORAGE DE ROCHE, TREPAN ANNULAIRE ET ADAPTATEUR POUR FORAGE A PERCUSSION

Publication

EP 1399640 A1 20040324 (EN)

Application

EP 02741584 A 20020620

Priority

  • SE 0201212 W 20020620
  • SE 0102292 A 20010626

Abstract (en)

[origin: WO03001022A1] The present invention relates to a rock drilling tool, a ring drill bit and an adapter for percussive drilling. The rock drilling tool (10) is intended to be connected to a casing tube (46) and a drill rod (62) in order to form a borehole. The casing tube is intended to be used as a channel for drill dust. The rock drilling tool comprises: - a drill adapter (20), including a flush duct for a flush medium, first drivers in order to transfer rotation, - a central pilot drill bit (12) provided with rock cutting members (14) and detachably connected to the first fastening means (21, 22) of the drill adapter, - a ring drill bit (17), provided with rock cutting members (41), and arranged to surround parts of the drill adapter during drilling, whereby the ring drill bit comprises second drivers intended to co-operate with the first driver of the drill adapter in order to rotate the ring drill bit with the drill adapter, and a casing shoe (18), intended to be secured to the casing tube as well as the ring drill bit, at least in connection with drilling, which casing shoe is arranged to push the casing tube only in the axial direction of the tool, whereby the casing tube (46) and the ring drill bit may be left in the borehole after finished drilling.

IPC 1-7

E21B 10/40; E21B 7/20; E21B 10/64

IPC 8 full level

E21B 7/20 (2006.01); E21B 10/40 (2006.01); E21B 10/64 (2006.01)

CPC (source: EP)

E21B 7/20 (2013.01); E21B 10/40 (2013.01); E21B 10/64 (2013.01)

Citation (search report)

See references of WO 03001022A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

DOCDB simple family (publication)

WO 03001022 A1 20030103; EP 1399640 A1 20040324; SE 0102292 D0 20010626; SE 0102292 L 20021227; SE 519312 C2 20030211

DOCDB simple family (application)

SE 0201212 W 20020620; EP 02741584 A 20020620; SE 0102292 A 20010626