Global Patent Index - EP 0993540 A1

EP 0993540 A1 2000-04-19 - DEVICE AND METHOD FOR CREATING RAMIFICATIONS IN A BORE HOLE

Title (en)

DEVICE AND METHOD FOR CREATING RAMIFICATIONS IN A BORE HOLE

Title (de)

VORRICHTUNG UND VERFAHREN ZUM HERSTELLEN VON BOHRLOCHVERZWEIGUNGEN

Title (fr)

DISPOSITIF ET PROCEDE POUR LA REALISATION DE RAMIFICATIONS DANS UN TROU DE FORAGE

Publication

EP 0993540 A1 (DE)

Application

EP 98940193 A

Priority

  • DE 19729809 A
  • EP 9804274 W

Abstract (en)

[origin: DE19729809C1] The present invention relates to a drilling device for creating ramifications in a bore hole drilled in unstable rock, wherein said device comprises a pilot drill head (14) whose progression is fully controlled and has a drill rod (4) attached thereto. The pilot drill head comprises an opening (42) on its periphery, a deflection part (50) located within said head as well as outlet openings (34, 36) through which a bore-hole reinforcing suspension is ejected. An inner drill head (44) is capable of longitudinal displacement along the pilot drill head (14) and is deviated by the deflection part (50) from the path (54) of said pilot drill head (14). After the completion of a pilot bore by forwarding the pilot drill head whose progression is fully controlled, a bore-hole reinforcing suspension is ejected from said pilot drill head while the inner drill head passes by the deflection part in the pilot drill head, a ramification bore being thus created by forwarding said inner drill head.

IPC 1-7 (main, further and additional classification)

E21B 7/06; E21B 7/18; E21B 23/00; E21B 29/06; E21B 33/10; E21B 33/138; E21B 43/10

IPC 8 full level (invention and additional information)

E21B 7/06 (2006.01); E21B 7/08 (2006.01); E21B 7/18 (2006.01); E21B 29/06 (2006.01); E21B 33/138 (2006.01); E21B 41/00 (2006.01); E21B 43/10 (2006.01)

CPC (invention and additional information)

E21B 29/06 (2013.01); E21B 7/061 (2013.01); E21B 7/065 (2013.01); E21B 7/18 (2013.01); E21B 33/138 (2013.01); E21B 41/0042 (2013.01); E21B 43/10 (2013.01)

Citation (search report)

See references of WO 9902815A1

Designated contracting state (EPC)

ES FR GB IT NL

DOCDB simple family

DE 19729809 C1 19981217; AR 040618 A1 20050413; EP 0993540 A1 20000419; EP 0993540 B1 20020403; ES 2175750 T3 20021116; US 6325164 B1 20011204; WO 9902815 A1 19990121; WO 9902815 A8 20000504