EP 0166568 A2 19860102 - Cement collar and method of use.
Title (en)
Cement collar and method of use.
Title (de)
Zementierschleuse und Anwendungsverfahren.
Title (fr)
Manchon de cimentation et son procédé d'utilisation.
Publication
Application
Priority
US 62488484 A 19840627
Abstract (en)
A cementing collar for inclusion in a well casing to permit primary multiple stage cementing comprises a tubular housing (12, 40, 64), a cementing port (52) and sleeve means (200) inside the housing and slidable in response to pressure changes to open and close the port.
IPC 1-7
IPC 8 full level
E21B 33/16 (2006.01); E21B 34/10 (2006.01); E21B 34/14 (2006.01)
CPC (source: EP US)
E21B 33/16 (2013.01 - EP US); E21B 34/103 (2013.01 - EP); E21B 34/142 (2020.05 - EP US)
Designated contracting state (EPC)
AT DE FR GB IT NL
DOCDB simple family (publication)
EP 0166568 A2 19860102; EP 0166568 A3 19870429; AU 4310785 A 19860102
DOCDB simple family (application)
EP 85304357 A 19850618; AU 4310785 A 19850529