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Well Control

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TOP DRIVE IBOP (Upper/Lower)


The TOP DRIVE IBOP is a vital blowout preventer used in top drive systems to ensure well control during high-pressure drilling operations. It meets API 6A standards and is designed for rapid sealing and long-term durability.

Full Opening Safety Valve (FOSV)


API 7-1 compliant Full Opening Safety Valve (FOSV / TIW) for reliable drill string well control. Designed for tripping, workover, and emergency operations with full-bore flow and premium thread compatibility.

Float Valve Sub (Flapper / Plunger Type)


Float Valve Sub is installed in the drill string (commonly near the bit) to prevent reverse flow of mud/fluids back into the drill pipe. Unionlever OFS supplies Flapper Type “G”, Plunger Type “F”, and Plunger Type “FBP”, with OD and connections per your drilling program.

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