EQUIPMENT SYSTEM FOR GAS FIELD WELL CONTROLLING Russian patent published in 2009 - IPC E21B33/03 E21B43/12 

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to reservoir engineering and can be used for remote, automatic and manual control of actuating mechanisms of shutting-off devices of gas field wells. The equipment contains a control station for shutting-off devices of the well, more specifically wing and casing valves, fitted on wellhead equipment, choke valve, underground safety valve, with actuating mechanisms, as well as a valve for controlling low and high pressure and a fuse link. The control station includes at least one control unit for actuating mechanisms for shutting off devices, a pump-accumulator unit with and actuating medium, mainly in form of liquid, power lines for functional control of the said actuating mechanisms and a logical control line, which can provide for command transmission for at least shutting off the well in a logical sequence: wing valve - casing valve - underground safety valve, fitted for this system for double selective actuation, respectively, of the low pressure and high pressure control valves, fuse link, either remote or manual command for closing shutting off devices of the well. For this purpose the said line is also provided with a timed three-step actuating system with slow transmission of actuation command for at least closure of casing valve and underground safety valve, including logical control lines in at least sections for controlling the casing valve and the underground safety valve, different time-tuned command transmission delay mechanisms, consisting of a combination a hydropneumatic accumulator and a choke, fitted in series in the said sections. The pump-accumulator unit has a tank with actuating medium and a group of pumps.

EFFECT: more reliable and accident-free operation of the well, reduced cost of extracting oil and gas and much easier control of processes.

15 cl, 3 dwg, 1 ex