Global Patent Index - EP 1006259 A2

EP 1006259 A2 2000-06-07 - Downhole tool

Title (en)

Downhole tool

Title (de)

Bohrlochwerkzeug

Title (fr)

Outil de fond de puits

Publication

EP 1006259 A2 (EN)

Application

EP 99309270 A

Priority

US 20410398 A

Abstract (en)

A downhole tool has a tubular valve housing (102,104,106,108), a valve closure member movable (132) between an open and a closed position, an axially movable opening flow tube (124,130) for opening the valve closure member (132). Hydraulic pressure from a control line (114) is used to move a first piston (118), which in turn moves the axially movable flow tube (124,130) through the closure member (132). A balance line (116) can be used to provide a hydrostatic pressure against a second piston (120). The downhole tool can be used as a subsurface safety valve. <IMAGE> <IMAGE> <IMAGE>

IPC 1-7 (main, further and additional classification)

E21B 34/00; E21B 34/14

IPC 8 full level (invention and additional information)

E21B 34/10 (2006.01); E21B 34/00 (2006.01)

CPC (invention and additional information)

E21B 34/10 (2013.01); E21B 2034/005 (2013.01)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 1006259 A2 20000607; US 2002074129 A1 20020620

INPADOC legal status


2005-01-05 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20040602

2000-06-07 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2000-06-07 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI