4. Valves and valve actuation
  5. Blow-out preventers

Roland M. Howard, Jr.

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Fluid operated, axially reciprocating actuator

Valves and valve actuation – Blow-out preventers
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Ram type blowout preventers

Wells – Means for perforating – weakening – bending or separating pipe... – With disparate below ground feature
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Profile ID: LFUS-PAI-P-1057052

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