Union Oil Company of California

Robert W Rardin

David S Pye

Donald L Ash

A method for placing a perforated liner in a well penetrating a reservoir containing a high pressure fluid, for example, a geothermal fluid. The holes in one or more sections of a preperforated liner are temporarily closed by inserting therein hollow plugs having an open flange end at the outer surface of the liner and a closed end projecting into the bore of the liner. The lower end of a first section of liner is also closed as with a solid plug. The liner, made up of one or more of the above-described sections which have been joined together, is run into the well through a pressure sealing device at the wellhead, such as a stripper rubber or rotating head. When the liner has been properly positioned in the well, a cutting or scraping tool is run down the inside of the liner to remove the closed end of each plug projecting into the liner, thus opening the perforations in the liner. Reservoir fluids can be produced through the well around the outside of the liner while the liner is being placed.

Growing community of inventors

Santa Rosa, CA, United States of America

Robert W Rardin