4. Boring or penetrating the earth
  5. Automatic control
  6. Of advance or applied tool weight

Leon Van Den Steen

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Capacitive submergible electrical connector apparatus

Electricity: electrical systems and devices – Miscellaneous
Patent

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Device for controlling weight on bit of a drilling assembly

Boring or penetrating the earth – Automatic control – Of advance or applied tool weight
Patent

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Drilling assembly with reduced stick-slip tendency

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

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Method of determining drill string stiffness

Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Mechanical measurement system
Reexamination Certificate

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Profile ID: LFUS-PAI-P-174531

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