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

FIELD: oil-and-gas production.

SUBSTANCE: invention relates to exploitation of oil 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 well pad. The oil well pad comprises at least two oil wells, each of which contains an extracting column with a flow column with underground production equipment, containing at least circulating and shear valves, non-freezing return valve and, if necessary, a separation column, meant for separating oil and water, as well as a remote controlled device for cutting off flow of oil, made with an actuating mechanism, wellhead with wellhead equipment, with a column head, tubing head, on which an X-mas tree is mounted, which comprises shutting-off devices - casing and wing valves with actuating mechanisms, as well as a throttle valve adjacent to the latter for controlling flow, made with an actuating mechanism, and monitoring and control elements - fuse link and a low- and high-pressure valve. Each well is linked through its shutting-off devices 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 and a high-pressure power functional hydropneumatic accumulator linked 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 the cut off device, supplied by the said high-pressure line through pressure regulators, and controls their operation through a time-stepped system for command transmission for at least closure of a well in the logical sequence: "wing valve - casing valve - cut off device" - 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 transmits a command for closing 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 with power lines for functional control of actuating mechanisms of the casing valve and the cut off device, where the delay mechanisms comprise a hydropneumatic accumulator and a throttle, which provide for closure of each well at different times. The power line for functional control of the actuating mechanism of the throttle valve is provided with a three-position distribution valve, preferably with two electromagnets.

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

16 cl, 3 dwg