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

摘要

2120365 9403698 PCTABS00030 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 (70) including methods and devices (94) for re-entering selected lateral wells (70) to perform completions work, additional drilling, or remedial and stimulation work. Various methods and devices are provided for assisting in the location and re-entry of lateral wells (70). Such re-entry devices include permanent or retrievable deflector (e.g., whipstock) devices (94). Preferably, the re-entry methods of this invention permit the bore size of the lateral wells (70) to be the same or substantially the same bore size as the vertical wells (66).