EP 1951988 A2 20080806 - DOWNHOLE TOOL
Title (en)
DOWNHOLE TOOL
Title (de)
BOHRLOCHWERKZEUG
Title (fr)
OUTIL DE FOND
Publication
Application
Priority
- GB 2006004400 W 20061124
- GB 0523841 A 20051124
- GB 0607412 A 20060413
Abstract (en)
[origin: WO2007060449A2] A method of actuating a tool in a downhole string comprises utilising a flow restriction, such as a non-return valve, which provides less restriction to fluid flow in the normal direction to induce a reverse fluid pressure differential to permit actuation of the tool.
IPC 8 full level
E21B 21/10 (2006.01); E21B 34/14 (2006.01); E21B 41/00 (2006.01)
CPC (source: EP US)
E21B 21/10 (2013.01 - EP US); E21B 21/103 (2013.01 - EP US); E21B 34/142 (2020.05 - EP US)
Citation (search report)
See references of WO 2007060449A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2007060449 A2 20070531; WO 2007060449 A3 20070726; AU 2006318890 A1 20070531; CA 2630916 A1 20070531; EP 1951988 A2 20080806; NO 20082813 L 20080812; US 2009056952 A1 20090305
DOCDB simple family (application)
GB 2006004400 W 20061124; AU 2006318890 A 20061124; CA 2630916 A 20061124; EP 06808669 A 20061124; NO 20082813 A 20080623; US 9498806 A 20061124