OIL AND GAS WELL PAD Russian patent published in 2009 - IPC E21B33/03 E21B43/12 

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to exploitation of oil-gas fields and can be used for remote, automatic and manual control of actuating mechanisms of shutting-off devices of wells, which are part of an oil and gas well pad. The well pad comprises at least two oil and gas wells, each of which contains an extracting column and a flow column with underground production equipment, containing at least a production packer, circulation and shear valves, as well as a remote controlled safety valve with an actuating mechanism, wellhead with wellhead equipment, with a column head, tubing head, on which an X-mas tree is mounted, which includes shutting-off devices - casing and wing valves with actuating mechanisms, as well as a throttle valve adjacent to the latter, made with an actuating mechanism, and monitoring and control elements - fuse link and a low- and high-pressure control valve. Each well is linked through its shutting-off devices, throttle valve and safety valve to a control station, which comprises a common pump-accumulator unit and at least one control unit for each well. The pump-accumulator unit comprises a group of pumps, fitted for the first and second climate zones, preferably, with two parallel connected high-pressure pump, one of which is a distribution pump, and a high-pressure power functional hydropneumatic accumulator linked to the group of pumps through the actuating medium of the high-pressure line. Each control unit comprises power lines for functional control of actuating mechanisms of shutting-off devices, throttle valve and safety valve, supplied by the said high-pressure line through pressure regulators, and made with possibility of controlling their operation through a time-stepped delayed command transmission for at least closure of each well in the logical sequence: "wing valve - casing valve - safety valve" - logical control line, linked to the fuse link and low- and high-pressure control valve and fitted with hydraulic control valves which can back up command transmission for closure of each well, one of the hydraulic control valves of which can transmit a command for closure of each well to the logical control line from the fuse link, the other from the low- and high-pressure control valve, and at least two others - from remote and manual control, respectively. The said delay system comprises delay mechanisms, fitted on sections for interaction of the logical control line and power lines for functional control of actuating mechanisms of the casing valve and safety valve, where the delay mechanisms comprise a hydropneumatic accumulator and a throttle, which provide for closure of the well at different times. The power functional hydropneumatic accumulator is essentially modular-sectional.

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

17 cl, 3 dwg