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

EP 0961008 A3 20030305 (EN)

Application

EP 99303238 A 19990427

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 1-7

E21B 47/09; E21B 23/02; E21B 23/04; E21B 23/00; E21B 43/10; E21B 7/06; E21B 34/14

IPC 8 full level

E21B 7/06 (2006.01); E21B 7/08 (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); E21B 47/09 (2012.01)

CPC (source: EP US)

E21B 7/061 (2013.01 - EP); E21B 23/02 (2013.01 - EP); E21B 23/03 (2013.01 - EP US); E21B 23/042 (2020.05 - EP); E21B 23/12 (2020.05 - EP); E21B 41/0042 (2013.01 - EP); E21B 43/10 (2013.01 - EP); E21B 47/09 (2013.01 - EP)

Citation (search report)

• [A] US 3888306 A 19750610 - WETZEL RODNEY J
• [A] US 4574883 A 19860311 - CARROLL ALBERT W [US], et al
• [A] US 5549161 A 19960827 - GOMEZ ALFREDO [US], et al
• [A] US 3474539 A 19691028 - MOORE LAWRENCE K
• [A] US 5579829 A 19961203 - COMEAU LAURIER E [CA], et al
• [X] WO 9809053 A2 19980305 - BAKER HUGHES INC [US]
• [A] US 5388648 A 19950214 - JORDAN JR HENRY J [US]
• [A] US 2397070 A 19460319 - ZUBLIN JOHN A
• [A] GB 2316424 A 19980225 - BAKER HUGHES INC [US]
• [PX] CA 2236047 A1 19990305 - BEGGS STEVEN [CA], et al

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family (publication)

EP 0961008 A2 19991201; EP 0961008 A3 20030305; EP 0961008 B1 20061213

DOCDB simple family (application)

EP 99303238 A 19990427