EP 1570153 A1 20050907 - DOWNHOLE SAFETY VALVE FOR CENTRAL CIRCULATION COMPLETION SYSTEM
Title (en)
DOWNHOLE SAFETY VALVE FOR CENTRAL CIRCULATION COMPLETION SYSTEM
Title (de)
SICHERHEITSVENTIL IM BOHRLOCK FÜR BOHRLOCHKOMPLETTIERUNG MIT ZENTRALEM DURCHFLUSS
Title (fr)
SOUPAPE DE SURETE DE FOND POUR SYSTEME DE COMPLETION A CIRCULATION CENTRALE
Publication
Application
Priority
US 0237395 W 20021121
Abstract (en)
[origin: WO2004048748A1] A downhole safety valve for a central circulation completion system (12) which comprises an inner tubular member (26) that extends through an outer tubular member (28) and a production bore which is defined between the inner and outer tubular members. The downhole safety valve (10) comprises a generally cylindrical body (78) which includes an outer surface and a through bore (94) that extends generally axially through the body. The body is secured to the inner tubular member (26) and is sealed to the outer tubular member (28) to thereby form a pressure barrier between a first portion of the production bore located below the body and a second portion of the production bore located above the body. The downhole safety valve further comprises at least one flow passage (112) which extends through the body and communicates between the first and second portions of the production bore, and at least one closure member which is disposed across the flow passage to control fluid flow between the first and second portions of the production bore.
IPC 1-7
IPC 8 full level
E21B 33/035 (2006.01); E21B 33/04 (2006.01); E21B 34/02 (2006.01); E21B 43/00 (2006.01)
CPC (source: EP US)
E21B 33/0355 (2013.01 - EP US); E21B 33/04 (2013.01 - EP); E21B 43/00 (2013.01 - EP)
Citation (search report)
See references of WO 2004048748A1
Designated contracting state (EPC)
FR GB
DOCDB simple family (publication)
WO 2004048748 A1 20040610; AU 2002359441 A1 20040618; EP 1570153 A1 20050907; EP 1570153 B1 20060329; NO 20053026 L 20050621
DOCDB simple family (application)
US 0237395 W 20021121; AU 2002359441 A 20021121; EP 02793981 A 20021121; NO 20053026 A 20050620