A piston pump for tail production of oil

F - Mech Eng,Light,Heat,Weapons – 04 – B

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F04B 47/08 (2006.01) E21B 43/00 (2006.01) F04B 9/111 (2006.01)

Patent

CA 2532224

A piston pump for submerging in an oil well, consisting of four pistons that, by means of a fixed interlock (105) between two opposing pistons and a cog wheel interlock (104) between these and the two other pistons, get two oncoming piston pairs in which the mass forces are balanced. On the suction side, the pump has a valve set with a suction- and pressure valve for each of the cylinders in the bottom section; and, on the drive side, a bistable 3-5 port valve that alternately reciprocates the hydraulic oil flow from the drive unit to the one or the other cylinder pair.

La présente invention concerne une pompe à pistons destinée à être insérée dans un puits de pétrole, comprenant quatre pistons qui, grâce à un système d'encliquetage fixe (105) entre deux pistons opposés et à un système d'encliquetage de roues dentées (104) entre ceux-ci et les deux autres pistons, forment deux paires de pistons dans lesquelles les forces massiques sont équilibrées. La pompe présente du côté aspiration un ensemble de clapets comprenant un clapet d'aspiration et un clapet de pression pour chacun des cylindres dans la partie inférieure, et du côté entraînement, un clapet à 3-5 trous bistable qui fait effectuer un mouvement alternatif au flux d'huile hydraulique de l'unité d'entraînement vers l'une ou l'autre des paires de cylindres.

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