4. Cutlery

John E. Tschirky

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Bearing assembly

Cutlery
Patent

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Circulation sub for in-hole hydraulic motors

Boring or penetrating the earth – With below-ground tool drive prime mover – Fluid rotary type
Patent

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Downhole fire control

Boring or penetrating the earth – With means movable relative to tool below ground to stop... – With longitudinally spaced valve seats
Patent

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Downhole fire control

Fluid handling – Destructible or deformable element controlled – Heat destructible or fusible
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Drilling and casing landing apparatus and method

Boring or penetrating the earth – Processes
Patent

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Profile ID: LFUS-PAI-P-17774

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