Multilateral sealing

Details Multilateral sealing Multilateral sealing

E - Fixed Constructions

21

B

E21B 33/10 (2006.01) E21B 17/08 (2006.01) E21B 41/00 (2006.01)

Patent

CA 2211085

The invention comprises a casing tool having a lateral root premachined therein and plugged with cement. A wear bushing is also positioned within the entrance to the root from the uphole side of the tool to prevent distortion or even destruction of the root while the lateral is being drilled. Subsequent to the lateral being drilled the wear bushing is removed and a liner is run which is then sealed to the bore of the root with conventional sealing techniques, thus avoiding the need to seal oval holes.

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