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

Valves and valve actuation – Blow-out preventers
Patent

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Testing mechanism for blowout preventer ram lock

Valves and valve actuation – Blow-out preventers
Patent

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Valve and a process for removing a closure member of the valve

Valves and valve actuation – Blow-out preventers – Radial reciprocating ram
Patent

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Valve apparatus

Valves and valve actuation – Blow-out preventers
Patent

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Valve apparatus

Valves and valve actuation – Blow-out preventers – Radial reciprocating ram
Patent

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Valve assembly

Valves and valve actuation – Blow-out preventers
Patent

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Valve element

Valves and valve actuation – Blow-out preventers – Radial reciprocating ram
Reexamination Certificate

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Valve having pressure equalizing conduit

Valves and valve actuation – Blow-out preventers
Patent

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Valves

Valves and valve actuation – Blow-out preventers
Patent

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Variable bore packer for a ram type blowout preventer

Valves and valve actuation – Blow-out preventers – Radial reciprocating ram
Patent

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Variable bore packer for a ram-type blowout preventer

Valves and valve actuation – Blow-out preventers – Radial reciprocating ram
Patent

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Variable bore ram rubber

Valves and valve actuation – Blow-out preventers
Patent

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Variable bore ram rubber with non-overlapping inserts

Valves and valve actuation – Blow-out preventers – Radial reciprocating ram
Patent

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Variable position ram lock for blowout preventers

Valves and valve actuation – Blow-out preventers
Patent

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Variable ram seal for blowout preventers

Valves and valve actuation – Blow-out preventers – Radial reciprocating ram
Patent

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Well blowout preventer packer assembly and packer modules theref

Valves and valve actuation – Blow-out preventers
Patent

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Well blowout preventer, and packing element

Valves and valve actuation – Blow-out preventers
Patent

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Well blowout preventer, and packing element

Valves and valve actuation – Blow-out preventers
Patent

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Well blowout preventer, and packing element

Valves and valve actuation – Blow-out preventers
Patent

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Well shut off device

Valves and valve actuation – Blow-out preventers
Patent

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