EP 0940558 B1 20050119 - Wellbore electrical heater
Title (en)
Wellbore electrical heater
Title (de)
Elektrisches Bohrlochheizgerät
Title (fr)
Appareil de chauffage de fond de puits
Publication
Application
Priority
- US 7702298 P 19980306
- US 7716098 P 19980306
Abstract (en)
[origin: EP0940558A1] A heater is disclosed which comprises an electrical insulating material surrounding an annular heating element configuration; wherein there is no casing surrounding an annular heating element configuration. <IMAGE>
IPC 1-7
IPC 8 full level
E21B 36/04 (2006.01)
CPC (source: EP)
E21B 36/04 (2013.01)
Designated contracting state (EPC)
BE DE ES FR GB IT NL SE
DOCDB simple family (publication)
EP 0940558 A1 19990908; EP 0940558 B1 20050119; AU 1857399 A 19990923; AU 746983 B2 20020509; CA 2264354 A1 19990906; CA 2264354 C 20071106; CN 1232718 C 20051221; CN 1236858 A 19991201; DE 69923247 D1 20050224; DE 69923247 T2 20060112; JO 2077 B1 20000521; MA 24902 A1 20000401
DOCDB simple family (application)
EP 99200644 A 19990305; AU 1857399 A 19990303; CA 2264354 A 19990304; CN 99102078 A 19990305; DE 69923247 T 19990305; JO P19992077 A 19990304; MA 25478 A 19990301