EP 0798443 B1 20030226 - Directional drilling method
Title (en)
Directional drilling method
Title (de)
Verfahren zum Richtungsbohren
Title (fr)
Procédé de forage directionnel
Publication
Application
Priority
DE 19612902 A 19960330
Abstract (en)
[origin: EP0798443A2] The boring machine bores via a remote controlled boring head (4). This is driven by concentric pipes with jointed sections (1). The rotation of the boring head is controlled to generate either straight line boring or curves. The latter are generated by varying the rotational speed. The boring head has water sprays and an eccentric cutting head. The bore obtained is smooth sided and has smooth curves. For straight line boring a constant drive speed is used.
IPC 1-7
IPC 8 full level
E21B 7/00 (2006.01); E21B 7/06 (2006.01); E21B 17/18 (2006.01)
CPC (source: EP US)
E21B 7/005 (2013.01 - EP US); E21B 7/06 (2013.01 - EP US); E21B 7/064 (2013.01 - EP US); E21B 7/067 (2013.01 - EP US); E21B 7/068 (2013.01 - EP US); E21B 17/18 (2013.01 - EP US)
Citation (examination)
US 5305838 A 19940426 - PAUC ANDRE [FR]
Designated contracting state (EPC)
AT CH DE FR GB LI SE
DOCDB simple family (publication)
EP 0798443 A2 19971001; EP 0798443 A3 19990224; EP 0798443 B1 20030226; AT E233366 T1 20030315; DE 19612902 A1 19971002; DE 19612902 C2 20000511; DE 59709365 D1 20030403; JP H1030392 A 19980203; US 5937954 A 19990817
DOCDB simple family (application)
EP 97104675 A 19970319; AT 97104675 T 19970319; DE 19612902 A 19960330; DE 59709365 T 19970319; JP 9642097 A 19970331; US 82384797 A 19970325