EP 2438264 A2 20120411 - HYDRAULIC OILFIELD LIFT PUMP
Title (en)
HYDRAULIC OILFIELD LIFT PUMP
Title (de)
HYDRAULISCHE ÖLFELDHEBEPUMPE
Title (fr)
POMPE ASPIRANTE HYDRAULIQUE POUR CHAMP PÉTROLIFÈRE
Publication
Application
Priority
- US 2010036807 W 20100601
- US 18326409 P 20090602
Abstract (en)
[origin: US2010300679A1] A vertically orientated hydraulically driven oilfield lift pump unit having a simplified hydraulic system. The system uses a pair of single acting hydraulic cylinders in tandem with a pair of double acting hydraulic cylinders interacting with hydraulic accumulators to provide an energy efficient, robust hydraulic system design with a minimum number of components.
IPC 8 full level
E21B 43/12 (2006.01); F04B 47/04 (2006.01)
CPC (source: EP US)
E21B 43/126 (2013.01 - EP US); F04B 47/04 (2013.01 - EP US)
Citation (search report)
See references of WO 2010141405A2
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
DOCDB simple family (publication)
US 2010300679 A1 20101202; AU 2010256864 A1 20111208; AU 2010256864 B2 20150122; CA 2763162 A1 20101209; CA 2763162 C 20140812; EP 2438264 A2 20120411; MX 2011012819 A 20111216; WO 2010141405 A2 20101209; WO 2010141405 A3 20110331; WO 2010141405 A4 20110609
DOCDB simple family (application)
US 79107010 A 20100601; AU 2010256864 A 20100601; CA 2763162 A 20100601; EP 10721094 A 20100601; MX 2011012819 A 20100601; US 2010036807 W 20100601