US 4,603,735 AGranted

Down the hole reverse up flow jet pump

AssigneeNew Pro Technology, Inc.

InventorJohn B. Black

Life of this patent

Estimating the term…

Loading patent…

Abstract

A reverse up flow jet pump used in an oil and gas pumping system having a positive displacement pump on the surface supplying water flow under pressure to the jet pump down the hole. The jet pump is used in a system drawing a vacuum reducing if not eliminating the effect of head pressure within the well resulting in freer fluid flow from the formation pay zone to thereby reduce costs and increase production. Water is fed downward through an innermost pipe to a plurality of water flow diverting lines just above the jet pump body directing the water flow to and through a plurality of water flow openings extended through the jet pump body from top to bottom and at the bottom to a water flow reversing cap that reverses the water flow and directs the water flow back up a central opening narrowing for accelerated water flow into and through a venturi chamber having a venturi inlet side vent for vacuum effect drawing well fluids and/or gases from the well casing and the formation into the water flow stream for passage from the jet pump body to and up larger tubing concentric with and enclosing the innermost pipe.

A down the hole reverse up flow jet pump in a system operational with circulation fluids pumped from above the earth surface comprising:

an in the well down the the hole up flow jet pump;
down flow fluid passage means connected to said jet pump and extending up the hole to the well head at the surface;
up flow fluid passage means connected to said jet pump and extending up the hole to the well head at the surface;
a jet pump elongate body with down flow fluid passage means extended through said body from top to bottom thereof connected to and forming an extension of said down flow fluid passage means connected to said jet pump and extending up the hole to the well head at the surface;
fluid flow reversing means mounted on the bottom of said jet pump elongate body;
lowering opening means in said body extending from the bottom of said body to a venturi chamber in said body with said lower opening means narrowing from its bottom to its upper exit opening to said venturi chamber for accelerated fluid flow into and through said venturi chamber;
said venturi chamber being of greater transverse cross-sectional area that the upper exit opening of said lower opening means;
upper opening means in said body extending from said venturi chamber to the top of said jet pump elongate body with said upper opening means connected to said up flow passage means;
and with said jet pump elongate body including venturi transverse inlet side vent means extended from the exterior of said body to said venturi chamber for vacuum effect drawing of well fluids and/or gases from the well casing and a well production zone into the fluid flow stream for passage from the jet pump body to and up said flow fluid passage means to the well head and from the well;
and wherein said jet pump elongate body is generally a cylindrical body;
said lower opening means in said body is a center opening in the form of a truncated cone narrowing from its larger bottom to its smaller upper exit opening;
and with said venturi chamber a centrally located cylindrical chamber.

9 more elements

Abstract

Claims30