4. Boring or penetrating the earth
  5. With tool shaft detail
  6. Shaft carried guide or protector

Stephen M. Collinsworth

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Drill section of a drilling tool

Boring or penetrating the earth – With tool shaft detail
Patent

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Removable wear protective means for a drilling tool

Boring or penetrating the earth – With tool shaft detail – Shaft carried guide or protector
Patent

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Rotary table deck bushing

Bearings – Rotary bearing – Antifriction bearing
Patent

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Wear protective means for a drilling tool

Boring or penetrating the earth – With tool shaft detail – Shaft carried guide or protector
Patent

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Profile ID: LFUS-PAI-P-219501

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