EP 1039133 A1 20000927 - BOB SYSTEM FOR ALTERNATING PUMPS
Title (en)
BOB SYSTEM FOR ALTERNATING PUMPS
Title (de)
STELLGLIED FÜR ALTERNIERENDE PUMPEN
Title (fr)
SYSTEME DE POUSSEE DE TIGE POUR POMPES ALTERNATIVES
Publication
Application
Priority
ES 9800274 W 19981005
Abstract (en)
The bob system for alternating pumps comprises a pyramidal tower (8) (fig. 1) with a truncated summit (5 and 6) (fig. 1) wherein a single acting hydraulic cylinder (2) (fig. 1) can rest, which are installed at the vertical of a water or oil well (16) (fig. 1). The piston (3) (fig. 1) of the hydraulic cylinder (2) (fig. 2) has a prolongation with holes (19) (fig. 2) which, during its down stroke, is introduced inside the support tube thereby producing a choking effect and forcing the oil to pass through the holes and slowing down gently the rod (10) (fig. 2) at the end of its down stroke. In the up stroke of the rod (10) (fig. 2) the contrary occurs, that is an acceleration up to the freeing of the piston extension (19) (fig. 2) inside the support tube (4) (fig. 2) thereby creating an overpressure which is compensated by an accumulator (23) (fig. 3). <IMAGE>
IPC 1-7
IPC 8 full level
F04B 47/04 (2006.01)
CPC (source: EP)
F04B 47/04 (2013.01)
Citation (search report)
See references of WO 0020758A1
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)
EP 1039133 A1 20000927; AU 9349298 A 20000426; EA 001692 B1 20010625; EA 200000612 A1 20001225; WO 0020758 A1 20000413
DOCDB simple family (application)
EP 98946465 A 19981005; AU 9349298 A 19981005; EA 200000612 A 19981005; ES 9800274 W 19981005