EQUIPMENT COMPLEX FOR CONTROLLING GAS-CONDENSATE DEPOSIT WELL Russian patent published in 2009 - IPC E21B33/03 E21B43/12 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil and gas industry, and can be used for controlling shutoff devices of gas-condensate deposit well. Equipment complex consists of control station of shutoff devices - side and overmaster Christmas-tree gate valves. There is also a throttle valve for controlling the well flow rate, an underground cutoff valve, low pressure and high pressure control valve, and a fuse. Control station includes at least one control unit of shutoff device actuators, a pump-accumulator unit with working medium, power lines of functional control of the above actuators, and a logic control line. That line is made with the possibility of command transmission at least for the well closing in logical sequence "side gate valve - overmaster gate valve - underground cutoff valve", and is equipped, for that purpose with dual selective actuation system from the reaction of low pressure and high pressure control valve, and the fuse respectively, or remote or manual commands to close the well shutoff devices. For that purpose the above line is also equipped with three-stage actuation system, as to the time, with slowing-down the transmission of executive command at least to close overmaster gate valve and underground cutoff valve, which includes devices that retard transmission of commands and have various adjustments as to the time. Those devices are installed at least in control areas of overmaster gate valve and cutoff valve of logic control line, and consist of a combination of control pneumatic hydraulic accumulator and throttle which are installed in series in the above areas. Pump-accumulator unit includes at least a power functional pneumatic hydraulic accumulator which is mainly modular and sectional.

EFFECT: simplifying the device design, and improving its operating reliability.

15 cl, 3 dwg