LandOfFree - US Patents - Listing for Wells,Means for perforating, weakening, bending or separating pipe...,With disparate below ground feature

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Annulus pressure operated vent assembly

Wells – Means for perforating – weakening – bending or separating pipe... – With disparate below ground feature

Patent

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Annulus pressure operated vent assembly

Wells – Means for perforating – weakening – bending or separating pipe... – With disparate below ground feature

Patent

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Apparatus for chemical cutting

Wells – Means for perforating – weakening – bending or separating pipe... – With disparate below ground feature

Patent

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Apparatus for continuously perforating in oil wells

Wells – Means for perforating – weakening – bending or separating pipe... – With disparate below ground feature

Reexamination Certificate

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Apparatus for increasing productivity by cutting openings throug

Wells – Means for perforating – weakening – bending or separating pipe... – With disparate below ground feature

Patent

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Apparatus for maintaining clean fluid in a chamber in a subterra

Wells – Means for perforating – weakening – bending or separating pipe... – With disparate below ground feature

Patent

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Apparatus for perforating and producing a well

Wells – Means for perforating – weakening – bending or separating pipe... – With disparate below ground feature

Patent

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Apparatus for porting a side wall of a conduit from interiorly t

Wells – Means for perforating – weakening – bending or separating pipe... – With disparate below ground feature

Patent

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Apparatus for regaining control over oil and gas flowing from "b

Wells – Means for perforating – weakening – bending or separating pipe... – With disparate below ground feature

Patent

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Apparatus for releasing a perforation gun

Wells – Means for perforating – weakening – bending or separating pipe... – With disparate below ground feature

Patent

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Apparatus for retrieving pipe sections from a well bore

Wells – Means for perforating – weakening – bending or separating pipe... – With disparate below ground feature

Patent

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Arrangement for patching off troublesome zones in a well

Wells – Means for perforating – weakening – bending or separating pipe... – With disparate below ground feature

Patent

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Automatic drop-off device for perforating guns

Wells – Means for perforating – weakening – bending or separating pipe... – With disparate below ground feature

Patent

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Balanced isolation tool enabling clean fluid in tubing perforate

Wells – Means for perforating – weakening – bending or separating pipe... – With disparate below ground feature

Patent

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Blade seal for a shearing blind ram in a ram type blowout preven

Wells – Means for perforating – weakening – bending or separating pipe... – With disparate below ground feature

Patent

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Blowout preventer

Wells – Means for perforating – weakening – bending or separating pipe... – With disparate below ground feature

Patent

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Blowout preventer shearing and sealing rams

Wells – Means for perforating – weakening – bending or separating pipe... – With disparate below ground feature

Patent

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Blowout preventer with tubing shear rams

Wells – Means for perforating – weakening – bending or separating pipe... – With disparate below ground feature

Patent

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Blowout preventer, shear ram, shear blade and seal therefor

Wells – Means for perforating – weakening – bending or separating pipe... – With disparate below ground feature

Patent

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Blowout preventers having shear rams

Wells – Means for perforating – weakening – bending or separating pipe... – With disparate below ground feature

Patent

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