Controlling the pressure within an annular volume of a wellbore

Wells – Processes – Heating – cooling or insulating

Reexamination Certificate

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C166S295000, C166S371000, C507S231000

Reexamination Certificate

active

07870905

ABSTRACT:
A process is described for replacing at least a portion of the liquid within the annular volume of a casing system within a wellbore with a second liquid. The second liquid is preselected to provide a measure of control of the pressure within the annular volume as the fluid within the volume is being heated.

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