LandOfFree - US Patents - Listing for Wells,Pistons, fluid driven into well,With downflow past piston

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Anti-rotation method and apparatus for limiting rotation of...

Wells – Pistons – fluid driven into well – With downflow past piston

Reexamination Certificate

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Anti-rotation method and apparatus for limiting rotation of...

Wells – Pistons – fluid driven into well – With downflow past piston

Reexamination Certificate

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Apparatus for detecting ruptures in drill pipe above and below t

Wells – Pistons – fluid driven into well – With downflow past piston

Patent

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Cementing apparatus

Wells – Pistons – fluid driven into well – With downflow past piston

Patent

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Cementing plug

Wells – Pistons – fluid driven into well – With downflow past piston

Patent

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Cementing plug launching apparatus

Wells – Pistons – fluid driven into well – With downflow past piston

Patent

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Cementing systems for wellbores

Wells – Pistons – fluid driven into well – With downflow past piston

Patent

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Device for controlling the flow of fluid in an oil well

Wells – Pistons – fluid driven into well – With downflow past piston

Patent

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Method for drilling and casing a wellbore with a pump down...

Wells – Pistons – fluid driven into well – With downflow past piston

Reexamination Certificate

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Pumpdown safety valve

Wells – Pistons – fluid driven into well – With downflow past piston

Patent

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Remote cementing plug launching system

Wells – Pistons – fluid driven into well – With downflow past piston

Patent

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Surface controlled subsurface safety valve

Wells – Pistons – fluid driven into well – With downflow past piston

Patent

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System for controlling the flow of fluid in an oil well

Wells – Pistons – fluid driven into well – With downflow past piston

Patent

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Wireline delivery tool

Wells – Pistons – fluid driven into well – With downflow past piston

Patent

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