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

John N. Troxell, Jr.

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Blowout preventer

Valves and valve actuation – Blow-out preventers
Patent

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Pressure relief valve

Fluid handling – Line condition change responsive valves – Direct response valves
Patent

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Rod locking device

Expansible chamber devices – With releasable stop or latch means to prevent movement of... – Means includes element interfitting between working member...
Patent

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Shearing type blowout preventer

Wells – Means for perforating – weakening – bending or separating pipe... – With disparate below ground feature
Patent

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Telescoping joint

Pipe joints or couplings – With assembly means or feature
Patent

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Profile ID: LFUS-PAI-P-168588

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