Patent ID: 7870899

Claim:
A method of delivering a selected material into a hydrocarbon producing well where hydrocarbons are produced from the well into a production line wherein the method utilizes the pressure of the well, the method comprising: a) delivering hydrocarbon gas from the hydrocarbon producing well at a pressure greater than ambient surface pressure into a first chamber associated with a pump mechanism; b) drawing a selected material into a second chamber associated with the pump mechanism that the pressure of the hydrocarbon gas being delivered into the first chamber associated with the pump mechanism causes the selected material to be drawn into the second chamber and storing the energy associated with the high pressure hydrocarbon gas; c) producing hydrocarbon gas from the well to the production line and thereby allowing the pressure of the well to reduce; and d) releasing the stored energy associated with the high pressure hydrocarbon gas in the pump mechanism and thereby delivering the selected material from the second chamber into the well.