EP 2035702 A2 20090318 - LINEAR ROD PUMP APPARATUS AND METHOD
Title (en)
LINEAR ROD PUMP APPARATUS AND METHOD
Title (de)
LINEARE KOLBENSTANGENPUMPE UND VERFAHREN
Title (fr)
APPAREIL ET PROCÉDÉ DE POMPE À TIGE LINÉAIRE
Publication
Application
Priority
- US 2007070989 W 20070612
- US 81279506 P 20060612
Abstract (en)
[origin: WO2007146931A2] An apparatus and method for pumping fluids, such as water and/or hydrocarbons, from a subterranean formation or reservoir, include a linear rod pump having a mechanical rack and pinion drive arrangement, adapted for attachment to a pumping mechanism, such as the polished rod at the top of a rod string in a hydrocarbon well. The rack gear, of the rack and pinion drive arrangement, is adapted for connection to, and movement with, the polished rod. The pinion gear does not translate with the rack gear, and is driven by a reversible motor for affecting up and down reciprocating motion of the rack gear and pumping mechanism. Some forms of the invention include a compressible gas counter-balance arrangement. Some forms of the invention include an electronic drive configured for dealing with electric power generated by the motor during a portion of the pumping cycle.
IPC 8 full level
F04B 47/02 (2006.01); F04B 17/03 (2006.01); F04B 47/04 (2006.01)
CPC (source: EP)
F04B 47/022 (2013.01); F04B 47/04 (2013.01)
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 MT NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK RS
DOCDB simple family (publication)
WO 2007146931 A2 20071221; WO 2007146931 A3 20081127; CA 2654908 A1 20071221; CA 2654908 C 20140909; EP 2035702 A2 20090318; EP 2035702 A4 20170111; EP 2035702 B1 20180822; MX 2008015795 A 20090211; MX 337274 B 20160217
DOCDB simple family (application)
US 2007070989 W 20070612; CA 2654908 A 20070612; EP 07798436 A 20070612; MX 2008015795 A 20070612; MX 2012012458 A 20070612