Wells – Packers or plugs – Flow stopping type; e.g. – plug
Reexamination Certificate
2008-07-08
2008-07-08
Bagnell, David J. (Department: 3676)
Wells
Packers or plugs
Flow stopping type; e.g., plug
Reexamination Certificate
active
07395856
ABSTRACT:
A system allows for sequential treatment of sections of a zone. Access to each portion can be with a sliding sleeve that has a specific internal profile. Pump down plugs can be used that have a specific profile that will make a plug latch to a specific sleeve. Pressure on the plug when latched allows a sequential opening of sleeves while zones already affected that are below are isolated. The pump down plugs have a passage that is initially obstructed by a material that eventually disappears under anticipated well conditions. As a result, when all portions of a zone are handled a flow path is reestablished through the various latched plugs. The plugs can also be blown clear of a sliding sleeve after operating it and can feature a key that subsequently prevents rotation of the plug on its axis in the event is later needs milling out.
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Bagnell David J.
Baker Hughes Incorporated
Fuller Robert E
Rosenblatt Steve
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