4. Wells
  5. Valves, closures or changeable restrictors

Leon H. Robinson, Jr.

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Apparatus and method for detecting abnormal drilling conditions

Boring or penetrating the earth – With signaling – indicating – testing or measuring – Measuring or indicating drilling fluid rate of flow
Patent

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Apparatus for maintaining a coiled electric conductor in a drill

Geometrical instruments
Patent

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Tracked cable guide assembly and method for storing conductor ca

Wells – Valves – closures or changeable restrictors
Patent

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Profile ID: LFUS-PAI-P-1348957

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