4. Valves and valve actuation
  5. Blow-out preventers
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Ram type blowout preventer

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

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Ram type blowout preventer having improved ram front packing

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

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Ram type blowout preventer having improved ram front packings

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

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Ram type blowout preventor

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

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Ram-type blowout preventer

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

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Ram-type blowout preventer

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

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Ram-type blowout preventer

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

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Ram-type blowout preventer

Valves and valve actuation – Blow-out preventers
Patent

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Ram-type blowout preventer

Valves and valve actuation – Blow-out preventers
Patent

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Ram-type blowout preventer and packer therefor

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

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Ram-type blowout preventer and packer therefor

Valves and valve actuation – Blow-out preventers
Patent

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Retrievable blow-out preventer ram seals

Valves and valve actuation – Blow-out preventers
Patent

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Rod locking device

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

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Rotary blowout preventer

Valves and valve actuation – Blow-out preventers – Deformable annulus
Patent

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Rotating blowout preventer with independent cooling circuits...

Valves and valve actuation – Blow-out preventers – Deformable annulus
Reexamination Certificate

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Rotating blowout preventer with independent cooling circuits...

Valves and valve actuation – Blow-out preventers – Deformable annulus
Reexamination Certificate

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Rotating blowout preventer with independent cooling circuits...

Valves and valve actuation – Blow-out preventers – Deformable annulus
Reexamination Certificate

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Seal structure for elevated temperature service

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

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Stripper/packer and blowout preventer with split bonnet

Valves and valve actuation – Blow-out preventers
Patent

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Submersible work vessel for installing a blow out preventer

Valves and valve actuation – Blow-out preventers
Patent

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