Abstract: A seal cartridge and barrel manifold seal are provided for use in a subterranean well and in a method to inject fluid, that is initially produced into the well from a subterranean formation or zone, into another subterranean formation or zone. The seal cartridge has two distinct annular seals positioned within opposite sides of a unitary housing to inhibit fluid flow through the housing in both axial directions along a rod that is positioned through the housing. A barrel seal manifold is provided that is unitary in design and has tapered flow surfaces thereby provided increased strength, flow dynamics and life.

Abstract: A seal cartridge and barrel manifold seal are provided for use in a subterranean well and in a method to inject fluid, that is initially produced into the well from a subterranean formation or zone, into another subterranean formation or zone. The seal cartridge has two distinct annular seals positioned within opposite sides of a unitary housing to inhibit fluid flow through the housing in both axial directions along a rod that is positioned through the housing. A barrel seal manifold is provided that is unitary in design and has tapered flow surfaces thereby provided increased strength, flow dynamics and life.

Abstract: A seal cartridge and barrel manifold seal are provided for use in a subterranean well and in a method to inject fluid, that is initially produced into the well from a subterranean formation or zone, into another subterranean formation or zone. The seal cartridge has two distinct annular seals positioned within opposite sides of a unitary housing to inhibit fluid flow through the housing in both axial directions along a rod that is positioned through the housing. A barrel seal manifold is provided that is unitary in design and has tapered flow surfaces thereby provided increased strength, flow dynamics and life.

Abstract: A dual annulus production tool includes an upper annular seal provided in a sealing relationship with well casing bore below ground surface and above an opening in the casing, an elongated outer tubing in the casing bore extending from ground surface downward through and in a sealing relationship with the upper annular seal to an lower end of the outer tubing located below the upper annular seal, the outer tubing and casing defining an outer annulus therebetween extending from above the upper annular seal to the ground surface, an elongated inner tubing in the casing bore within the outer tubing extending from ground surface downward to a lower end of the inner tubing located below the upper annular seal, the outer and inner tubings defining an inner annulus therebetween for routing flow of fluid from below the upward annular seal upward through the inner annulus to ground surface without entering the outer annulus, and an annular housing in the casing bore below the upper annular seal and adjacent to a well