Patent ID: 7048522
Filing Date: 2006-05-23
Classification: F04B

Abstract:
1. A pump assembly for pumping fluid from a fluid reservoir connected via a first conduit to an operation pressure source, the pump being responsive to the application of pressure on fluid within the first conduit by the operation pressure source, said pump assembly comprising: a housing connected at the lower end of the first conduit and positioned within a fluid to be transported through said first conduit; an upper barrel, having a top and bottom end, positioned within said housing; a lower barrel section extending downwardly from said housing; a plunger assembly movably disposed so as to move with respect to the upper and lower barrel, said assembly movable in a first direction responsive to pressure applied to fluid in said first conduit for drawing fluid into said housing; and a second conduit, connected to the top end of said upper barrel, filled with a liquid and extending to the surface for moving said plunger assembly in a second direction when pressure is released from said fluid in said first conduit wherein fluid from said reservoir drawn into said housing is produced into said housing.