Subsea energy storage for blow out preventers (BOP)

摘要

A subsea energy storage for well control equipment, wherein stored energy near a well on the sea floor monitors and activates well control equipment independently of, or in conjunction with, hydraulic energy. Energy to the subsea energy storage can be supplied by surface umbilical, remotely-operated vehicle, or by subsea electrical generation from stored hydraulic energy. Stored electrical energy may also recharge stored hydraulic energy. A subsea control system is configured to record data, compare the data to predetermined event signatures, and operate the well control equipment with stored electrical energy.

主权项

1. A method, comprising:
storing electrical energy near a well on a sea floor in an energy storage device, wherein the energy storage device is configured to provide stored electrical energy; storing hydraulic energy near the well on the sea floor in a hydraulic energy storage tank, wherein the hydraulic energy storage tank is configured to provide stored hydraulic energy to operate a shear ram; operating a pump from the stored electrical energy to generate the stored hydraulic energy; and activating the shear ram with a combination of the stored electrical energy and the stored hydraulic energy by:
activating the shear ram with the stored electrical energy to move the shear ram a first distance; andactivating the shear ram with the stored hydraulic energy to move the shear ram a second distance.