Wells – Processes – Placing or shifting well part
Reexamination Certificate
2007-05-22
2007-05-22
Dang, Hoang (Department: 3672)
Wells
Processes
Placing or shifting well part
C166S050000, C166S117600, C166S207000, C166S242100
Reexamination Certificate
active
10794441
ABSTRACT:
A casing junction member connects in a well between a main casing and a lateral branch casing. The junction member has an upper end section which connects to the main casing extending above the member. It has a lower end section that is coaxial and connects into the main casing below the junction member. The junction member has a lateral section which extends downward for connecting to lateral branch casing. The junction between the main section and the lateral section has enlarged sections that are formed by opposed cones. A removable or drillable closure member blocks the lateral passage while in the collapsed and expanded positions. The casing junction uses internal fluid pressure to move from collapsed position to expanded position.
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Dang Hoang
Nobileau Philippe C.
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