Isolation system comprising a plug and a circulation valve...

Wells – Processes – Placing or shifting well part

Reexamination Certificate

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Details

C166S387000, C166S332400, C166S373000

Reexamination Certificate

active

07810575

ABSTRACT:
An isolation system for an oil and gas well is described wherein the system comprises an isolation section and a first isolation device integral with the section and a second isolation device sealingly engaged to the section. The first isolation device may be a pressure-actuated valve and the second isolation device may be a plug.

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