BUOYANCY ASSIST TOOL WITH CENTER DIAPHRAGM DEBRIS BARRIER

A downhole apparatus comprises a casing string with a removable plug therein to block flow therethrough. A flow barrier is positioned in the casing below the removable plug and the removable plug and the flow barrier defining a buoyancy chamber therebetween. A debris barrier positioned above the rem...

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Bibliographische Detailangaben
Hauptverfasser: Ahuja, Mayur Narain, Kim, Byong Jun, Helms, Lonnie Carl, Parameshwaraiah, Rajesh, Yuan, Min Mark, Patil, Ishwar Dilip
Format: Patent
Sprache:eng
Schlagworte:
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Beschreibung
Zusammenfassung:A downhole apparatus comprises a casing string with a removable plug therein to block flow therethrough. A flow barrier is positioned in the casing below the removable plug and the removable plug and the flow barrier defining a buoyancy chamber therebetween. A debris barrier positioned above the removable plug comprises a rigid annular ring with a flexible diaphragm covering the center opening defined by the annular ring.