4. Wells
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Annular flow safety valve and methods

Wells – Processes – Placing or shifting well part
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Annular gas trap

Wells – Conduit wall or specific conduit end structure – Downhole coupling or connector
Patent

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Annular isolators for expandable tubulars in wellbores

Wells – Processes – Placing or shifting well part
Reexamination Certificate

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Annular isolators for expandable tubulars in wellbores

Wells – Packers or plugs – Cup type
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Annular isolators for expandable tubulars in wellbores

Wells – Processes – Placing or shifting well part
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Annular isolators for expandable tubulars in wellbores

Wells – Processes – Placing or shifting well part
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Annular isolators for expandable tubulars in wellbores

Wells – Packers or plugs – Spaced sealing portions
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Annular isolators for expandable tubulars in wellbores

Wells – Packers or plugs
Reexamination Certificate

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Annular isolators for expandable tubulars in wellbores

Wells – Packers or plugs
Reexamination Certificate

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Annular isolators for expandable tubulars in wellbores

Wells – Processes – Placing or shifting well part
Reissue Patent

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Annular isolators for expandable tubulars in wellbores

Wells – Processes – Placing or shifting well part
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Annular isolators for tubulars in wellbores

Wells – Processes – Cementing – plugging or consolidating
Reexamination Certificate

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Annular pack having mutually engageable annular segments

Wells – Processes – Assembling well part
Reexamination Certificate

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Annular packer and insert

Wells – Above ground apparatus – With seal for reciprocating member
Patent

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Annular pressure relief collar

Wells – Conduit wall or specific conduit end structure
Reexamination Certificate

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Annular pressure spool

Wells – Processes – Placing or shifting well part
Reexamination Certificate

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Annular safety assembly for an oil well, especially a double pro

Wells – Packers or plugs – With expanding anchor
Patent

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Annular safety system

Wells – Packers or plugs – With expanding anchor
Patent

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Annular safety system for oil well

Wells – Packers or plugs – With expanding anchor
Patent

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Annular sample chamber, full bore, APR.RTM. sampler

Wells – Receptacles
Patent

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