EP 0543642 A2 19930526 - Downhole seal circulating devices.
Title (en)
Downhole seal circulating devices.
Title (de)
Dichtungsvorrichtung zur Verwendung im Bohrloch.
Title (fr)
Dispositif d'étanchéité au fond de puits.
Publication
Application
Priority
US 79620391 A 19911122
Abstract (en)
A cup-type seal circulating device (10) or a compression type packer seal circulating device for use in running a string of casing into a well bore, has a connector member (12) for connection to the drilling rig equipment to allow fluid to be pumped into the device; a seal body member (14); a seal assembly (16) and a check valve (18). The circulating device is received in casing (22) and the seal assembly seals between the seal body member and the casing (22). <IMAGE>
IPC 1-7
IPC 8 full level
E21B 33/068 (2006.01); E21B 33/126 (2006.01); E21B 33/128 (2006.01)
CPC (source: EP)
E21B 33/068 (2013.01); E21B 33/126 (2013.01); E21B 33/128 (2013.01)
Designated contracting state (EPC)
DE DK FR IT NL
DOCDB simple family (publication)
EP 0543642 A2 19930526; EP 0543642 A3 19930811; AU 2848392 A 19930527; CA 2083477 A1 19930523; NO 924454 D0 19921118; NO 924454 L 19930524
DOCDB simple family (application)
EP 92310533 A 19921118; AU 2848392 A 19921120; CA 2083477 A 19921120; NO 924454 A 19921118