EP 0346961 A2 19891220 - Method and apparatus for placing a cement lining in a borehole.
Title (en)
Method and apparatus for placing a cement lining in a borehole.
Title (de)
Verfahren und Vorrichtung zum Setzen einer Zementauskleidung in einem Bohrloch.
Title (fr)
Procédé et dispositif pour placer un revêtement de ciment dans un puits.
Publication
Application
Priority
GB 8814004 A 19880614
Abstract (en)
A cement lining is placed in a borehole using a cementing apparatus including a centralized stinger (6) which is suspended from a cement injection tubing (5). In use a cement slurry is introduced into the annular space (3) surrounding the tubing and stinger and after subsequently filling the interior of the tubing and stinger with mud the apparatus is pulled thereby leaving in the borehole a cement plug with an open or soft core. The centralization of the stinger ensures that after hardening of the cement a cement layer of a constant thickness is created alongside the borehole wall (1).
IPC 1-7
IPC 8 full level
E21B 17/10 (2006.01); E21B 33/138 (2006.01)
CPC (source: EP)
E21B 17/1078 (2013.01); E21B 33/138 (2013.01)
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
EP 0346961 A2 19891220; EP 0346961 A3 19910515; EP 0346961 B1 19950726; CA 1324573 C 19931123; DE 68923585 D1 19950831; DE 68923585 T2 19960229; GB 8814004 D0 19880720; NO 302136 B1 19980126; NO 892412 D0 19890612; NO 892412 L 19891215
DOCDB simple family (application)
EP 89201346 A 19890525; CA 601120 A 19890530; DE 68923585 T 19890525; GB 8814004 A 19880614; NO 892412 A 19890612