X-TREE CONTROL METHOD AND DEVICE THEREFOR Russian patent published in 2016 - IPC E21B43/12 E21B34/16 

FIELD: gas industry.

SUBSTANCE: invention relates to gas production industry and can be used in automatic control of processes and is intended to improve reliability of operation of gas producing wells. Disclosed is a method of controlling an X-tree of a hydrocarbon well located on sea ice-proof platform and is intended for extraction of formation fluid and detection of fire in mouth of wells. Operation of multiple wells is controlled simultaneously. For actuation of downhole cutoff valve, master and side gate valves, method uses hydraulic fluid, operating pressure of which is created by means of hydraulic pump. Hydraulic fluid supply control into drives of downhole cutoff valve, side and master valve is performed by means of electromagnetic distributors of high pressure, controlled by means of signals of a controller, which are obtained after preliminary analysis of signals of sensors monitoring parameters of station, wherein method provides subsequent opening of valve actuator only after removal/acknowledgement of emergency commands on panel of fire module operator and emergency situations or panel of operator of automatic process control system.

EFFECT: control system of underground cutoff valve, side and/or master valve of each well provide shut off all wells with absence/disappearance of supply voltage of control station.

11 cl, 12 dwg