4. Communications: electrical
  5. Wellbore telemetering or control
  6. Selective control of subsurface equipment
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Actuation method

Communications: electrical – Wellbore telemetering or control – Selective control of subsurface equipment
Patent

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Analysis and identification of a drilling fluid column based on

Communications: electrical – Wellbore telemetering or control – Selective control of subsurface equipment
Patent

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Apparatus and method for determining boring direction when borin

Communications: electrical – Wellbore telemetering or control – Selective control of subsurface equipment
Patent

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Apparatus and method for positioning a tool in a deviated sectio

Communications: electrical – Wellbore telemetering or control – Selective control of subsurface equipment
Patent

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Apparatus and method for positioning a tool in a deviated sectio

Communications: electrical – Wellbore telemetering or control – Selective control of subsurface equipment
Patent

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Apparatus for electromagnetically coupling power and data signal

Communications: electrical – Wellbore telemetering or control – Selective control of subsurface equipment
Patent

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Apparatus for locating a member in a borehole

Communications: electrical – Wellbore telemetering or control – Selective control of subsurface equipment
Patent

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