4. Wells
  5. Screens
  6. Spiral

James Leppink

Examiner

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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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Down hole cycloidal drill drive

Boring or penetrating the earth – Tool actuation by reaction of rotating eccentric mass
Patent

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Drill bit with yielding support and force applying structure for

Boring or penetrating the earth – Cutter element laterally shiftable below ground – Cutter element shifted by fluid pressure
Patent

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Helically wrapped wire screen assembly and fitting therefor

Wells – Screens – Spiral
Patent

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Profile ID: LFUS-PAI-P-1385537

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