Wells – Above ground apparatus – With means for inserting fluid into well
Reexamination Certificate
2007-04-17
2007-04-17
Gay, Jennifer H. (Department: 3672)
Wells
Above ground apparatus
With means for inserting fluid into well
C166S093100, C166S177400
Reexamination Certificate
active
10786573
ABSTRACT:
A removable surface pack-off device adapted for use in reverse cementing applications is provided. The device includes a housing adapted to be mounted between the ends of an inner casing and an outer casing at or near the surface of a well and at least one fluid passage disposed within the housing, which is adapted to pass fluid, such as cement, from a location outside of the well into an annulus formed between the inner and outer casings. It also includes a first pressure-activated seal disposed between the inner casing and the housing and a second pressure-activated seal disposed between the outer casing and the housing. The device further includes an attachment assembly, which enables the device to be easily removed from the well.
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Rogers Henry E.
Webb Earl D.
Fuller Robert
Gay Jennifer H.
Halliburton Energy Service,s Inc.
Wustenberg John W.
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