EP 1072754 A2 20010131 - Ground removing device
Title (en)
Ground removing device
Title (de)
Vorrichtung zum Entfernen von Böden
Title (fr)
Dispositif pour enlever du sol
Publication
Application
Priority
- EP 00203891 A 19980701
- EP 98202205 A 19980701
- EP 97202177 A 19970711
Abstract (en)
A device for removing ground (2) comprises a plurality of interconnected jetting units accommodated next to each other at the leading side of the ground removing device. Each jetting unit has a jetting chamber (78) which is open at the leading side thereof. Each jetting chamber (78) comprises a wall at the trailing side thereof. Further, each jetting unit comprises a first duct (86) for feeding jetting fluid to a jetting device in the jetting chamber (78), a second duct (87) for feeding jetting fluid to the jetting chamber (78), and a third duct (68, 90) for removing a ground/fluid mixture from the jetting chamber (78). The ground removing device is pulled through the ground by pulling means (12), which comprise one or more drill strings (14; 62; 112) or casing strings (16). <IMAGE>
IPC 1-7
E21B 7/18; E21B 7/20; E21D 9/04; E21D 9/10; E21B 7/28; F16L 15/08; E21C 25/60; E21C 37/12
IPC 8 full level
E21B 7/20 (2006.01); E21B 7/26 (2006.01); E21B 7/30 (2006.01); E21D 9/04 (2006.01); E21D 9/10 (2006.01); E21D 11/10 (2006.01)
CPC (source: EP)
E21B 7/20 (2013.01); E21B 7/30 (2013.01); E21D 9/04 (2013.01); E21D 9/1053 (2013.01); E21D 11/105 (2013.01)
Designated contracting state (EPC)
BE DE DK FR GB NL SE
DOCDB simple family (publication)
EP 1186742 A2 20020313; EP 1186742 A3 20041013; EP 1072754 A2 20010131; EP 1072754 A3 20041013
DOCDB simple family (application)
EP 01202368 A 19980701; EP 00203891 A 19980701