4. Wells
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Wellhead assembly and method for an injection tubing string

Wells – Processes – Cyclic injection then production of a single well
Reexamination Certificate

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Wellhead assembly for accessing an annulus in a well and a...

Wells – Submerged well – Connection or disconnection of submerged members remotely...
Reexamination Certificate

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Wellhead assembly for communicating with the casing hanger...

Wells – Submerged well – Wellhead
Reexamination Certificate

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Wellhead assembly for hydraulic pumping system

Wells – Above ground apparatus – Inner member anchor or seal with valve
Reexamination Certificate

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Wellhead assembly for injecting a fluid into a well and...

Wells – Submerged well – Wellhead
Reexamination Certificate

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Wellhead assembly for injection wells

Wells – Processes – Disassembling well part
Patent

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Wellhead assembly with pressure actuated seal assembly and...

Wells – Submerged well – Connection or disconnection of submerged members remotely...
Reexamination Certificate

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Wellhead assembly with removable bowl adapter

Wells – Processes – Placing or shifting well part
Patent

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Wellhead blowout preventer with extended ram for sealing...

Wells – Above ground apparatus – With assembly or disassembly means
Reexamination Certificate

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Wellhead bore isolation tool

Wells – Processes – Assembling well part
Patent

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Wellhead bowl protector

Wells – Means for guiding insertable element laterally of well axis – Secured in operative position by movable means engaging well...
Patent

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Wellhead bowl protector and retrieving tool

Wells – Processes – With indicating – testing – measuring or locating
Patent

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Wellhead casing hanger assembly

Wells – Above ground apparatus – Suspension means
Patent

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Wellhead cleanup tool

Wells – Brushing – scraping – cutting or punching-type cleaners – On tubing or casing
Reexamination Certificate

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Wellhead completion system

Wells – Expansible anchor or casing – Liner hanger
Patent

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Wellhead completion system having a horizontal control...

Wells – Submerged well – Wellhead
Reexamination Certificate

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Wellhead connecting apparatus

Wells – Above ground apparatus – Cap or head pivotably attached to tube or casing
Patent

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Wellhead connector

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

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Wellhead connector

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

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Wellhead connector

Wells – Submerged well – Connection or disconnection of submerged members remotely...
Patent

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