BUOYANCY ASSIST TOOL WITH FLOATING PISTON

BUOYANCY ASSIST TOOL WITH FLOATING PISTON

A downhole apparatus comprises a casing string with a fluid barrier connected in the casing string. A degradable plug is positioned in the casing string above the fluid barrier. The degradable plug and fluid barrier define upper and lower ends of a buoyancy chamber in the casing string. The degradab...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Ahuja, Mayur Narain, Helms, Lonnie Carl, Parameshwaraiah, Rajesh, Yuan, Min Mark, Patil, Ishwar Dilip
Format: Patent
Sprache:eng
Schlagworte:
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
FIXED CONSTRUCTIONS
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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Beschreibung
Zusammenfassung:A downhole apparatus comprises a casing string with a fluid barrier connected in the casing string. A degradable plug is positioned in the casing string above the fluid barrier. The degradable plug and fluid barrier define upper and lower ends of a buoyancy chamber in the casing string. The degradable plug may be degraded to leave an open bore through the casing string after the casing string is lowered into a wellbore.