EP 0961008 B1 20061213 - Apparatus and method for drilling and completing a deviated borehole
Title (en)
Apparatus and method for drilling and completing a deviated borehole
Title (de)
Vorrichtung und Verfahren zum Bohren und Ausrüsten eines geneigten Bohrlochs
Title (fr)
Dispositif et procédé pour forer et équiper un puits dévié
Publication
Application
Priority
- CA 2236047 A 19980427
- CA 2245342 A 19980818
Abstract (en)
[origin: EP0961008A2] An assembly for formation and completion of deviated wellbores is disclosed which includes a toolguide (18) and a casing section (8) which can be used together or separately. The toolguide includes a lower orienting section (22) and a whipstock (24) having a sloping face, commonly known as the directional portion of a whipstock. The toolguide is coated with a material such as epoxy or polyurethane to provide a repairable surface and one which can be removed to facilitate removal of the toolguide from the well bore. The lower orienting section has a latch (20) which extends radially outwardly from the section and can be locked in the outwardly biased position. The casing section of the present invention includes a sleeve which can be moved between a first position in which access to the window opening of casing section is not affected and a second position in which the main casing is sealed from the liner section of a deviated wellbore to provide a hydraulic seal against passage of fluids from outside the casing of the wellbore into the main casing. <IMAGE>
IPC 8 full level
E21B 47/09 (2006.01); E21B 7/06 (2006.01); E21B 7/08 (2006.01); E21B 23/00 (2006.01); E21B 23/02 (2006.01); E21B 23/04 (2006.01); E21B 23/12 (2006.01); E21B 34/14 (2006.01); E21B 41/00 (2006.01); E21B 43/10 (2006.01)
CPC (source: EP US)
E21B 7/061 (2013.01 - EP); E21B 23/02 (2013.01 - EP); E21B 23/03 (2013.01 - EP US); E21B 23/12 (2020.05 - EP); E21B 41/0042 (2013.01 - EP); E21B 43/10 (2013.01 - EP); E21B 47/09 (2013.01 - EP)
Designated contracting state (EPC)
FR GB
DOCDB simple family (publication)
EP 0961008 A2 19991201; EP 0961008 A3 20030305; EP 0961008 B1 20061213
DOCDB simple family (application)
EP 99303238 A 19990427