Global Patent Index - EP 0884446 A3

EP 0884446 A3 2000-10-04 - Drilling apparatus

Title (en)

Drilling apparatus

Title (de)

Bohrgerät

Title (fr)

Appareil de forage

Publication

EP 0884446 A3 (DE)

Application

EP 98110794 A

Priority

DE 19725052 A

Abstract (en)

[origin: EP0884446A2] The drilling unit to make or widen (horizontal) boreholes, or to lay e.g. pipelines in the ground comprises a casing (1) containing a reciprocating piston (6, 9), a nozzle (17) for a pulsing cutting, lubrication, flushing and/or steering fluid, with a pressure chamber (16) located within the casing and connected to the nozzle. Also claimed is the corresponding method of making or widening subsurface boreholes using a fluid as indicated above.

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

E21B 4/14; E21B 7/06; E21B 7/18; E21B 7/20; E21B 7/26

IPC 8 full level (invention and additional information)

E21B 1/12 (2006.01); E21B 1/26 (2006.01); E21B 4/14 (2006.01); E21B 7/18 (2006.01); E21B 7/20 (2006.01); E21B 7/26 (2006.01)

CPC (invention and additional information)

E21B 7/065 (2013.01); E21B 4/145 (2013.01); E21B 7/18 (2013.01); E21B 7/206 (2013.01); E21B 7/26 (2013.01)

Citation (search report)

Designated contracting state (EPC)

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

EPO simple patent family

EP 0884446 A2 19981216; EP 0884446 A3 20001004; EP 0884446 B1 20080319; DE 19725052 A1 19981224; DE 19725052 C2 19991028; US 6138775 A 20001031

INPADOC legal status


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