Wells – Processes – Parallel string or multiple completion well
Patent
1997-08-28
1999-08-31
Tsay, Frank
Wells
Processes
Parallel string or multiple completion well
166 50, 1661176, E21B 4314
Patent
active
059441089
ABSTRACT:
The present invention relates to an improved method for multilateral completion and cementing (i.e., sealing) the juncture between primary and lateral wellbores. The completion method of the present invention addresses the issue of cementation and sealing of junctures between vertical and lateral wellbores. It is desirable to have the ability to re-enter each lateral wellbore as well as maintain the option to perform any function that could be done in a single wellbore. For this reason, cemented and sealed lateral wellbores are desirable so that normal isolation, stimulation or any other operation can be achieved. The method allows sealing and reworking of either wellbores with single laterals or multiple laterals and provides safe durable junctions therebetween. The method of this invention utilizes a "hook" liner hanger system. The Hook liner hanger system includes a novel camming surface and guide slot which cooperates with a complimentary control lug to selectively direct a tool in a primary or lateral wellbore.
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Baugh John L.
Hirth David E.
Murray Douglas J.
Baker Hughes Incorporated
Tsay Frank
LandOfFree
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