METHOD FOR CONTROL OF GAS HYDRATE DEPOSITS IN NODES OF ANNULAR PRODUCTION TREE LINE Russian patent published in 2025 - IPC E21B37/00 

FIELD: oil, gas and coke-chemical industry.

SUBSTANCE: invention relates to the oil and gas industry, namely to methods and means of controlling gas hydrate deposits formed during oil and gas production, and can be used both for prevention of formation of gas hydrates, and elimination of formed hydrates in elements of wellhead equipment, through which oil and gas are supplied to flow line. Method is based on switching a discrete nozzle controlled when gas hydrate deposits are formed in it. Novelty is that the method employs an automated integrated system for monitoring pressure and controlling switching of a discrete adjustable nozzle, in which pressure sensor (4) is used as a means of measuring pressure in annular line (1), providing continuous conversion of the measured pressure, including excess pressure, into a unified current output signal and a digital signal based on the HART protocol, and to control the switching of the control element of the discrete adjustable nozzle (2) using electric drive (3) connected to it through the reduction gear, wherein said pressure sensor (4) and electric drive (3) are connected to control cabinet (5) installed near the well, which is designed to convert the input signal from pressure sensor (4) into an analogue output signal supplied to electric drive (3) of the nozzle with the task of switching its control element to the maximum accessible diameter of the hole when the working pressure is exceeded by up to 10% for the gas hydrate purging and the excess pressure release, and after reducing the pressure to the operating value or reducing to 10%, the task of the converted output analogue signal is to return the said union to the initial position to restore the working state of the well and prevent formation of gas hydrates in the assemblies of the elements of the annular line of the X-mas tree.

EFFECT: providing automation of the process of inspection of units of an annular line of a production tree for timely prevention of formation of gas hydrate deposits and elimination of formed hydrates.

1 cl, 1 dwg