Hydraulic actuated pump system

Abstract

The invention is directed to a hydraulic actuated pump system which lifts production fluids and re-circulating hydraulic fluid from a petroleum well. Additives may be added to the hydraulic fluid to apply direct chemical treatment to the production formation. A sonic stimulator may be included to stimulate and produce the same liquids from the horizontal section of the well.

What is claimed is: 
     
         1 . A method of enhanced oil recovery from a formation, comprising the steps of:
 (a) installing a sonic stimulator into an injection wellbore, or a horizontal section of a wellbore, on the end of coiled tubing;   (b) activating the sonic stimulator with a liquid hydraulic power fluid to produce acoustic waves having a frequency of about 80 Hz to about 250 Hz, and inject hydraulic power fluid into the formation;   (c) using the liquid hydraulic power fluid to sweep oil towards one or more proximate production wells, or from the horizontal section of a wellbore towards a vertical section of the wellbore.   
     
     
         2 . The method of  claim 1 , wherein the liquid hydraulic power fluid comprises water, produced water, water-based fluids, water-oil emulsions, inorganic salt solutions, biodegradable plant-based hydraulic fluids, or synthetic and naturally occurring organic materials. 
     
     
         3 . The method of  claim 2 , wherein the liquid hydraulic power fluid is supplemented with one or more additives comprising oils, butanol, esters, silicones, alkylated aromatic hydrocarbons, polyalphaolefins, or corrosion inhibitors. 
     
     
         4 . The method of  claim 3 , wherein the one or more additives comprises a brine-based, heavy oil solution for creating a light oil-in-water emulsion within the production fluids. 
     
     
         5 . The method of  claim 2  wherein the liquid hydraulic fluid or the supplemented hydraulic fluid is heated to a temperature ranging from about 30° to 101° C.