Abstract: 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.

Abstract: 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.

Abstract: The invention relates to a safety device for an oil well and to the associated safety installation. The inventive device comprises a valve housing (40) which defines a fluid flow passage (52). The aforementioned housing (40) comprises a valve (48) which is used to seal the passage and which can move between an open position and a closed position and means for permanently biasing the valve towards the closed position thereof. The housing (40) also comprises releasable means (54) for connecting same to a working line with tubing that is intended to move the housing (40) in the conduit. In addition, the device comprises retractable means (42) for supporting the valve (58) in the open position and hydraulic means (44, 46) for actuating the support means (42) in order to activate same upon reception of a valve open control signal. The aforementioned support means (42) and actuation means (44, 46) are solidly connected to the housing (40) such that they can be moved simultaneously under the control of the line.

Abstract: The invention relates to a safety device for an oil well and to the associated safety installation. The inventive device comprises a valve housing (40) which defines a fluid flow passage (52). The aforementioned housing (40) comprises a valve (48) which is used to seal the passage and which can move between an open position and a closed position and means for permanently biasing the valve towards the closed position thereof. The housing (40) also comprises releasable means (54) for connecting same to a working line with tubing that is intended to move the housing (40) in the conduit. In addition, the device comprises retractable means (42) for supporting the valve (58) in the open position and hydraulic means (44, 46) for actuating the support means (42) in order to activate same upon reception of a valve open control signal. The aforementioned support means (42) and actuation means (44, 46) are solidly connected to the housing (40) such that they can be moved simultaneously under the control of the line.

Abstract: An assembly is disclosed for bridging pairs of closely spaced electrical terminals having a variety of predetermined spacings. The assembly consists of a pair of identical insulative body parts which have cavities therein for housing two identical contacts and conductive devices connected between the contacts. The contacts and the conductive devices are connected together and inserted into appropriate cavities of a first body part, whereupon the second body part is snapped together and sealed with the first body part. A cantilevered contact mount enables the contacts to deflect and mate with connector blocks having split blade-like metallic terminals of various predetermined spacings.