VALVES FOR FOSSIL FUEL PRODUCTION AND TRANSPORT WITH SAFETY UNIT Russian patent published in 2015 - IPC E21B33/03 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the production and transport of the mainly fossil fuel, and in particular to shutoff valves to close the channel of the pipeline in case of the fault or emergency under facility operation conditions. The technical result is increased reliability of safety valves under extreme operation conditions. The control system of the shutoff gear has work medium source connected with at least one multiplying gear. The multiplying gear is connected with the shutoff gear to convert the low pressure created by the work medium source in the work high pressure driving the shutoff gear, and with which at least one control valve actuating it is functionally connected. Each of these valves is made with possibility of operation under the control pressure from the safety unit.

EFFECT: unit ensures possibility to monitor operation of the control system and valves switching depending on value of the control force to the open or close position, at that ensuring possibility to increase the pressure acting on the shutoff gear for its switching to open position.

9 cl, 6 dwg