4. Wells
  5. Packers or plugs
  6. With expanding anchor

AVA International

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Hydraulically operated permanent type well packer assembly

Wells – Packers or plugs – With expanding anchor
Patent

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Subsurface well apparatus

Wells – Packers or plugs – With controllable bypass outside central conduit
Patent

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Well packers and slip assemblies for use therewith

Wells – Packers or plugs – With expanding anchor
Patent

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