EP 0884446 B1 20080319 - Drilling apparatus
Title (en)
Drilling apparatus
Title (de)
Bohrgerät
Title (fr)
Appareil de forage
Publication
Application
Priority
DE 19725052 A 19970613
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 8 full level
E21B 4/14 (2006.01); E21B 1/12 (2006.01); E21B 1/26 (2006.01); E21B 7/06 (2006.01); E21B 7/18 (2006.01); E21B 7/20 (2006.01); E21B 7/26 (2006.01)
CPC (source: EP US)
E21B 4/145 (2013.01 - EP US); E21B 7/065 (2013.01 - EP US); E21B 7/18 (2013.01 - EP US); E21B 7/206 (2013.01 - EP US)
Designated contracting state (EPC)
CH GB LI
DOCDB simple family (publication)
EP 0884446 A2 19981216; EP 0884446 A3 20001004; EP 0884446 B1 20080319; DE 19725052 A1 19981224; DE 19725052 C2 19991028; US 6138775 A 20001031
DOCDB simple family (application)
EP 98110794 A 19980612; DE 19725052 A 19970613; US 9622998 A 19980611