Patent ID: 7464759

Claim:
A method for injecting an injection fluid into an oil, natural gas, or water reservoir, the method comprising: providing at least one single fluid line sliding sleeve downhole tool assembly into a well in a closed position, wherein the at least one single fluid line sliding sleeve downhole tool assembly comprises: a top sub engaging a top connector which connects to a body that engages a middle connector which is secured to a port housing, wherein the port housing engages a lower connector and the lower connector engages a bottom sub; a sleeve with a production port for axially moving with respect to the body; an annulus port disposed in the port housing for communicating fluid between an annulus and tubing in the sleeve; a first seal assembly providing a sealing engagement between the sleeve and the top connector; a second seal assembly providing a sealing engagement between the middle connector and the sleeve; a third seal assembly providing a sealing engagement between the port housing and the sleeve; a first piston in communication with a fluid source and wherein the first piston moves axially between at least an original position and at least a secondary position; a second piston in communication with the fluid source and wherein the second piston moves axially between at least a second piston original position and at least a second piston secondary position; and wherein the first piston moves the sleeve in a first direction and the second piston moves the sleeve in a second direction; at least one logic drum linearly disposed between the body and the sleeve for rotating and translating alternatingly between the first piston and the second piston; a means for actuating the first piston and the second piston; a first relocating device for relocating the first piston from the secondary position to the original position and a second relocating device for relocating the second piston from the second piston secondary position to the second piston original position; applying a first pressure from the fluid source simultaneously to the first piston and the second piston enabling the first piston and the second piston to move the sleeve from the closed position to an open position; and allowing injection fluid to move into tubing, through the production port, into the annulus, and into a reservoir.