Quadruple RAM BOP
AssigneeTokyo Electron Limited
InventorsViral Shah, Leonard G. Childers, Alireza Shirani
Life of this patent
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Abstract
A blowout preventer having a body, a main bore in the body, and rams that project into the main bore. The rams can be shear rams for shearing a tubular in the main bore, pipe rains for sealing around a tubular in the main bore, or sealing rams that seal across the main bore. The rams are in cavities formed in the body, the cavities are formed such that more than two rams can be disposed at the same elevation in the body thereby reducing the overall height of the blowout preventer stack.
Claims20
A blowout preventer for use with a wellhead assembly comprising:
- a body having axis;
- a main bore in the body that is substantially parallel with the axis;
- at least three cavities in the body at substantially the same axial location in the body and that intersect the main bore;
- and
- a ram in each of the cavities.
A blowout preventer for use with a wellhead assembly comprising:
- a body having an axis and a main bore aligned with the axis;
- cavities in the body that extend radially outward from the main bore and along paths that range up to about 90° from one another;
- and
- a ram assembly in each of the cavities.
A blowout preventer stack selectively coupled with a wellhead assembly and comprising:
- an axis in the stack;
- a plurality of blowout preventers stacked on one another and each having a body;
- a main bore projecting axially through each of the bodies and that is substantially parallel with the axis;
- cavities in each body at substantially the same axial location in the body and that intersect the main bore and that extend along paths that range up to about 90° from one another;
- and
- rams in the cavities.
Dependencies are inferred from the claim text.