DUAL SLEEVE MULTIPLE STAGE CEMENTER AND ITS METHOD OF USE IN CEMENTING OIL AND GAS WELL CASING

摘要

This invention relates to a cementing tool used in oil and gas well multiple stage cementing operations, and more particularly to a cementing tool having an elongated case containing a plurality of ports, and two sliding sleeves within the case. The two sleeves, positioned in tandem relation one with the other, provide fluid tight seals between the ports and the interior of the cementing tool.