Multilateral sealing

Details Multilateral sealing Multilateral sealing

1997-07-21

1999-03-02

Tsay, Frank

Wells

Processes

Parallel string or multiple completion well

166 50, E21B 4314

Patent

active

058758470

ABSTRACT:
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.

REFERENCES:
patent: 2492079 (1949-12-01), Wiley
patent: 3884298 (1975-05-01), Watkins
patent: 4077472 (1978-03-01), Gano
patent: 4133378 (1979-01-01), Gano
patent: 4154298 (1979-05-01), Gano
patent: 4304310 (1981-12-01), Garrett
patent: 5330007 (1994-07-01), Collins et al.
patent: 5655602 (1997-08-01), Collins
patent: 5680901 (1997-10-01), Gardes
patent: 5685373 (1997-11-01), Collins et al.

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