4. Boring or penetrating the earth
  5. Means traveling with tool to constrain tool to bore along...

William N. Schoeffler

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Advanced quick ball release sub

Stone working – Slate surfacing
Patent

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Angle deviation tool

Boring or penetrating the earth – Automatic control – In response to drilling fluid circulation
Patent

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Automatic choke valve

Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface
Patent

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By-pass valve

Wells – Valves – closures or changeable restrictors – Fluid operated
Reexamination Certificate

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Controllable downhole directional drilling tool

Boring or penetrating the earth – Means traveling with tool to constrain tool to bore along...
Patent

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Profile ID: LFUS-PAI-P-664338

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