EP 1002933 A3 20020123 - Downhole hydraulic pressure generator
Title (en)
Downhole hydraulic pressure generator
Title (de)
Hydraulicher Bohrlochdruckgenerator
Title (fr)
Générateur de pression hydraulique de fond de puits
Publication
Application
Priority
US 18479398 A 19981102
Abstract (en)
[origin: EP1002933A2] A hydraulic pressure generator (14) provides pressurized fluid for actuation of well tools. The hydraulic pressure generator (14) comprises: a housing assembly (22); first and second fluid chambers (44,50) in the housing assembly (22); a piston (54) separating the first and second chambers (44,50); and a barrier device (42) isolating the first chamber (44) from fluid pressure in the well external to the housing assembly (22). The barrier device (42) is selectively actuatable to permit fluid communication between the first chamber (44) and the well external to the housing assembly (22), and thereby apply fluid pressure in the second chamber (50) greater than fluid pressure in the first chamber (44) by a predetermined amount. <IMAGE>
IPC 1-7
IPC 8 full level
E21B 23/06 (2006.01); E21B 33/128 (2006.01)
CPC (source: EP)
E21B 23/06 (2013.01); E21B 33/1285 (2013.01)
Citation (search report)
- [XY] US 3295615 A 19670103 - BRIEGER EMMET F, et al
- [Y] EP 0855491 A2 19980729 - HALLIBURTON ENERGY SERV INC [US]
- [Y] US 4745802 A 19880524 - PURFURST ERNEST H [US]
- [Y] US 5624001 A 19970429 - EVANS ROBERT W [US]
- [A] US 4254838 A 19810310 - BARNETCHE EDUARDO
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 99307942 A 19991008