EP 0467573 A3 19930210 - SUBSURFACE PRESSURE ACTUATED WELL APPARATUS
Title (en)
SUBSURFACE PRESSURE ACTUATED WELL APPARATUS
Publication
Application
Priority
US 54980390 A 19900709
Abstract (en)
[origin: EP0467573A2] Method and apparatus for actuating one or more downhole well tools carried by a production or work string conduit having an imperforate wall and for blocking fluid communication between an activating fluid body and a second fluid source within said well across dynamic seals between actuating members of the well tool, by producing selective signals through the conduit wall detectable by a member to produce an activating signal for actuating the downhole well tool by a downhole energy source. <IMAGE>
IPC 1-7
E21B 41/00; E21B 33/129; E21B 34/10; E21B 23/04; E21B 43/1185
IPC 8 full level
E21B 23/00 (2006.01); E21B 23/04 (2006.01); E21B 33/1295 (2006.01); E21B 34/06 (2006.01); E21B 34/10 (2006.01); E21B 41/00 (2006.01); E21B 43/1185 (2006.01); E21B 47/18 (2012.01)
CPC (source: EP US)
E21B 23/00 (2013.01 - EP); E21B 23/04 (2013.01 - EP US); E21B 23/042 (2020.05 - EP US); E21B 33/1295 (2013.01 - EP); E21B 34/06 (2013.01 - EP); E21B 34/063 (2013.01 - EP); E21B 34/066 (2013.01 - EP); E21B 34/102 (2013.01 - EP); E21B 41/00 (2013.01 - EP US); E21B 43/1185 (2013.01 - EP); E21B 43/11852 (2013.01 - EP); E21B 47/24 (2020.05 - EP)
Citation (search report)
[AD] US 3233674 A 19660208 - KURT LEUTWYLER
Designated contracting state (EPC)
DE DK FR GB IT NL
DOCDB simple family (publication)
EP 0467573 A2 19920122; EP 0467573 A3 19930210; BR 9102864 A 19920204; CA 2046470 A1 19920110; NO 912676 D0 19910708; NO 912676 L 19920110
DOCDB simple family (application)
EP 91306198 A 19910709; BR 9102864 A 19910708; CA 2046470 A 19910708; NO 912676 A 19910708