Apparatus and method for reverse circulation cementing a...

Wells – Processes – Cementing – plugging or consolidating

Reexamination Certificate

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C166S177400, C166S096100, C166S090100, C166S093100, C166S088100

Reexamination Certificate

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11255573

ABSTRACT:
A system for cementing a casing in an open wellbore having no surface casing, wherein an annulus is defined between the casing and the wellbore, the system having: an annular plug around the casing at the mouth of the wellbore; a cement composition pump fluidly connected to the annulus through the seal; and a coupling connected to the exposed end of the casing for taking circulation fluid returns from the inner diameter of the casing.

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Foreign Communication from a Related Counter Part Application, Jan. 8, 2007.
Foreign Communication from a Related Counter Part Application, Jan. 17, 2007.

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