METHOD AND APPARATUS FOR LOCATING AND RE-ENTERING ONE OR MORE HORIZONTAL WELLS USING MANDREL MEANS

摘要

In accordance with the present invention, a plurality of methods and devices are provided for solving important and serious problems posed by lateral (and especially multilateral) completion in a wellbore including methods and devices for re-entering selected lateral wells to perform completions work, additional drilling, or remedial and stimulation work. Methods and devices are described for assisting in the location and re-entry of lateral wells using a guide (148') or mandrel structure. Preferably, the re-entry methods of this invention permit the bore size of the lateral wells to be the same or substantially the same as the vertical wells (154').