Importance

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Abstract

The pressure biased shuttle valve assembly in the pressure biased shuttle valve operates in conjunction with a remote operated vehicle (ROV) to actuate blow-out preventers and thus shut in the well during emergency situations. The pressure biased shuttle valve assembly opens in response to fluid pressure from the ROV. It requires little or no flow to open. These pressure biased shuttle valves are typically located subsea on a lower marine riser platform (LMRP). These platforms are sometimes brought to the surface for a periodic testing and maintenance. The pressure biased shuttle valve assembly is also used as a repair kit which facilitates easy maintenance and repair when the LMRP is brought to the surface. In one embodiment, the shuttle is rigidly connected to a piston rod. In another embodiment, there is a flexible connection between the piston rod and shuttle. The purpose of the flexible connection is to encourage a better seal in smaller size valves.

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First Claim