Reverse circulation cementing process

Details Reverse circulation cementing process Reverse circulation cementing process

2006-03-21

2006-03-21

Neuder, William (Department: 3672)

Wells

Processes

With indicating, testing, measuring or locating

C166S285000, C166S291000

Reexamination Certificate

active

07013971

ABSTRACT:
A method of cementing a casing in a wellbore with a tool having a plurality of holes therethrough connected at a lower end of the casing. The total cross-sectional area of the holes is preferably greater than the cross-sectional area of the inside of the casing. A plurality of stoppers are pumped in a leading edge of a cement slurry down an annulus between the casing and the wellbore to the tool where the stoppers engage the holes to hold the cement slurry in the annulus until the cement slurry hardens.

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