SAFETY DEVICE FOR A FLUID PRODUCTION WELL, ASSOCIATED INSTALLATION AND METHOD

摘要

Safety device (10) for a fluid production well, comprising a valve (58) used to seal a passage, and which can move between an open position of the passage (52) and a closed position of the passage (52); and connecting biasing means (92) for permanently biasing the valve (58) towards the closed position thereof. The device comprises holding means (42) for holding the valve (58) in its open position against permanent biasing means (92), and actuating means (42, 44) which are configured to actuate the holding means (42), on reception of a maintenance signal, to generate: a first displacement of the movement element (98) from the active valve biasing position to an intermediate valve biasing position, in which the valve (58) remains in its open position; and a subsequent second return displacement of the movement element (58) from the intermediate valve biasing position to the active valve biasing position.

主权项

1. A safety device for a fluid production well, comprising:
a valve housing intended to be fixed tightly inside a fluid flow conduit, the housing delimiting a fluid flow passage and comprising:
a valve used to seal the passage, and which can move between an open position of the passage and a closed position of the passage;connecting biasing means for permanently biasing the valve towards the closed position thereof; and connecting means for connecting the housing to a coupling member for a working wire line intended to move and anchor the housing in the conduit; holding means for holding the valve in its open position against the permanent biasing means, said holding means comprising at least one movement element for the valve, which can move in the valve housing between a rest position and an active valve biasing position of the valve, and an element for permanently returning the movement element to its rest position; and actuating means which can be controlled by a control signal to actuate the holding means upon receipt of a valve open control signal by the actuating means, and to deactivate the holding means in the absence of said control signal; wherein the actuating means are configured to actuate the holding means, on reception of a maintenance signal, to generate: a first displacement of the movement element from the active valve biasing position to an intermediate valve biasing position, in which the valve remains in its open position; and a subsequent second return displacement of the movement element from the intermediate valve biasing position to the active valve biasing position.