CHRISTMAS TREE CONTROL CABINET Russian patent published in 2020 - IPC E21B34/16 

FIELD: oil, gas and coke-chemical industries.

SUBSTANCE: invention relates to oil and gas industry and can be used in development of devices for automatic control of technological processes of wells operation of hydrocarbon raw material deposits, mainly, gas or gas condensate ones. Disclosed is a control cabinet of a Christmas tree, comprising a cabinet made of sheet metal, in which a hydraulic system is installed to control the Christmas tree and the underground well shutoff valve. Housing of the cabinet is divided into a control compartment with an operator panel and a compartment for accommodating the main hydraulic equipment. Inside the above cabinet there is a hydraulic system for control of Christmas tree and underground well shutoff valve, containing devices of instrumentation and automated control systems, actuators, low and high pressure pilot distributors with a drive and with cavities of inlet, outlet and drain, installed both along the control line of the root and side gates, and along the underground cutoff valve control line, wherein in the hydraulic system pressure accumulators are connected, connected to the hydraulic fluid tank, pumps, pressure regulators, multiplying gear and pipelines for supply of hydraulic fluid to actuators of side and root radars, underground cutoff valve. Hydraulic equipment of hydraulic fluid pressure control line in actuators of gate valves, underground cutoff valve, which contains mainly reduction valve, safety valve, shutoff needle valves of main lines and drainage, check valves, is mounted on one hydraulic plate by means of butt and (or) cartridge mounting. In the plate there are corresponding internal channels for supply, removal of hydraulic fluid and drainage, as well as line for connection of instrumentation. Low-pressure pilot distributors included in the logic circuit of the well control and monitoring well shutdown during melting of the fusible inserts with increase or decrease of pressure in the high and low pressure control valves circuit, as well as low-pressure pilot distributors, which determine the sequence of opening and manual process or emergency shutdown of actuators of gate valves and underground cutoff valve, are combined into one block of low pressure distributors. In said unit, distributors are mounted on one hydraulic plate by means of butt joint, wherein appropriate inner channels for supply and discharge of hydraulic fluid and drain as well as instrumentation connection line are made in said plate.

EFFECT: due to the possibility of outputting information on the Christmas tree equipment and the control cabinet state to the operator panel, the Christmas tree control in interactive mode and placement of the equipment of the valve unit in the cover, higher reliability of the control cabinet operation as a whole and simplification of its design and installation.

4 cl, 10 dwg