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Work string controller

Wells – Above ground apparatus – With means facilitating connecting or disconnecting...
Reexamination Certificate

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Work string controller

Wells – Processes – Placing or shifting well part
Reexamination Certificate

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Work string controller

Wells – Processes – Placing or shifting well part
Reexamination Certificate

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Workover rig support apparatus

Wells – Above ground apparatus – External anchoring or bracing means
Patent

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Workover unit and method of utilizing same

Wells – Processes – Assembling well part
Reexamination Certificate

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Workstring and a method for gravel packing

Wells – Processes – Graveling or filter forming
Reexamination Certificate

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Workstring and a method for gravel packing

Wells – Processes – Graveling or filter forming
Reexamination Certificate

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Wye block having a rotary guide incorporated therein

Wells – Means for guiding insertable element laterally of well axis
Patent

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Wye block having automatically aligned guide structure

Wells – Processes – Parallel string or multiple completion well
Reexamination Certificate

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