Patent ID: 11940352
Assignee: PETRÓLEO BRASILEIRO S.A.—PETROBRAS
Field: Measurement (Instruments)
Classification: CPC G  E | IPC E  G

Claim 6:
7. A method for detecting watertightness in a flexible line from a connector according to the system in claim 1, comprising:
positioning the device in a seat including a pressure safety valve in the connector,
activating the seals against a wall of the seat,
moving the plunger forward using hydraulic action of the ROV, checking operation of the seal by fluctuation of the pressure value in the pressure gauge,
withdrawing the plunger to cause a pressure drop, resulting in an induced pressure verified by the pressure gauge, if an indicated pressure of the annulus is equal to a hydrostatic pressure at the seat, then the annulus is flooded with seawater, but if the pressure indicated by the pressure gauge is less than the hydrostatic pressure at the seat, then the annulus is watertight.