EP 0379187 B1 19920520 - METHOD OF PULLING OUTER TUBINGS
Title (en)
METHOD OF PULLING OUTER TUBINGS
Publication
Application
Priority
DE 3901664 A 19890120
Abstract (en)
[origin: EP0379187A1] In a method of boring out and pulling double tubing (9, 10) having inner and outer tubing, the boring-out and pulling of the tubing being effected by means of at least one power-driven rotary head (25, 26) traversable on a drill carriage (6), an installed ground anchor is loosened by virtue of the fact that the inner tubing (9) is pulled and the anchor installed before the outer tubing (10) is pulled, that the installed anchor is then secured against pulling-out by inner tubing (9) or a supporting element, and that, when the anchor is secured, the outer tubing (10) is pulled over the inner tubing (9) or the supporting element and that both the inner and outer tubing are deposited together. <IMAGE>
IPC 1-7
IPC 8 full level
E21B 15/04 (2006.01); E02D 5/74 (2006.01); E21B 7/02 (2006.01); E21B 7/20 (2006.01); E21B 19/20 (2006.01); E21D 20/00 (2006.01)
CPC (source: EP KR)
E02D 5/74 (2013.01 - EP); E21B 7/02 (2013.01 - KR); E21B 19/20 (2013.01 - EP); E21D 20/006 (2013.01 - EP)
Designated contracting state (EPC)
AT CH DE ES FR GB IT LI SE
DOCDB simple family (publication)
EP 0379187 A1 19900725; EP 0379187 B1 19920520; AT E76459 T1 19920615; DE 3901664 A1 19900726; DE 3901664 C2 19910207; DE 59000127 D1 19920625; JP H02279895 A 19901115; KR 900011957 A 19900802; KR 950014369 B1 19951125; PT 92887 A 19910913
DOCDB simple family (application)
EP 90100953 A 19900117; AT 90100953 T 19900117; DE 3901664 A 19890120; DE 59000127 T 19900117; JP 1166790 A 19900119; KR 900000198 A 19900109; PT 9288790 A 19900118