Annular isolators for tubulars in wellbores

Details Annular isolators for tubulars in wellbores Annular isolators for tubulars in wellbores

2007-05-15

2007-05-15

Dang, Hoang (Department: 3672)

Wells

Processes

Cementing, plugging or consolidating

C166S177100, C166S191000, C166S207000, C166S387000

Reexamination Certificate

active

10778465

ABSTRACT:
The present disclosure addresses apparatus and methods for forming an annular isolator in a borehole after installation of production tubing. A first deployable annular isolator is carried on tubing as it is positioned in a borehole. An annular isolator forming material is placed in the annulus around the first deployable isolator. The first isolator is then deployed into the material in the annulus to form a combined isolator. The annular isolator forming material is carried in a compartment in the tubing and forced from the compartment into the annulus. A second deployable isolator may be deployed before placing the material in the annulus to resist annular flow of the material before the first isolator is deployed. The second isolator may be deployed by material from the compartment. A second compartment may be provided to deploy the first isolator.

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