4. Wells
  5. Valves, closures or changeable restrictors
  6. Fluid operated

Hoang E. Dang

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Actuation of a gun firing head

Wells – Processes – Perforating – weakening – bending or separating pipe at an...
Patent

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Diamond setting in a cutting tooth in a drill bit with an increa

Boring or penetrating the earth – Bit or bit element – Magnetized or with magnet
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Safety valve in particular for closing an oil well

Wells – Valves – closures or changeable restrictors – Fluid operated
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Profile ID: LFUS-PAI-P-1408962

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