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Sacrificial adsorbate for surfactants utilized in chemical flood

Wells – Processes – Distinct – separate injection and producing wells
Patent

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Sacrificial agents for petroleum recovery processes

Wells – Processes – Distinct – separate injection and producing wells
Patent

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Safeguarded method and apparatus for fluid communiction using co

Wells – Processes – Placing or shifting well part
Patent

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Safety apparatus for automatically sealing hydraulic lines withi

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

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Safety apparatus for automatically sealing hydraulic lines withi

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

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Safety apparatus for perforating system

Wells – Processes – Perforating – weakening – bending or separating pipe at an...
Reexamination Certificate

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Safety cement plug launch system

Wells – Processes – Cementing – plugging or consolidating
Reexamination Certificate

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Safety centering basket

Wells – Guide for device or conduit – On sucker or pump rod
Patent

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Safety check valve for coiled tubing

Wells – Processes – Assembling well part
Reexamination Certificate

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Safety clamp for walking beam compressor

Wells – With eduction pump or plunger
Reexamination Certificate

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Safety coupling for rotary down hole pump

Wells – With below and above ground modification – Eduction pump or plunger in well
Patent

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Safety coupling for rotary pump

Wells – With below and above ground modification – Eduction pump or plunger in well
Patent

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Safety disc brake assembly

Wells – With below and above ground modification – Eduction pump or plunger in well
Patent

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Safety gate valve for petroleum wells, permitting operation by a

Wells – Valves – closures or changeable restrictors – Fluid operated
Patent

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Safety installation for a submerged drilling well-head

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

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Safety joint

Wells – Submerged well – With safety or emergency shutoff
Reexamination Certificate

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Safety joint

Wells – Processes – Freeing stuck object – grappling or fishing in well
Patent

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Safety lock for elevators

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

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Safety mechanism for weight-set downhole tool

Wells – Processes – Operating valve – closure – or changeable restrictor in a well
Reexamination Certificate

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Safety plug for sealing-off the tubing of a producing oil or gas

Wells – Packers or plugs – Controllable passage through packer
Patent

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