METHOD AND SYSTEM FOR COMBATING ASPHALT-RESIN-PARAFFIN AND/OR GAS HYDRATE DEPOSITS IN OIL AND GAS WELLS Russian patent published in 2021 - IPC E21B37/00 

FIELD: oil and gas industry.

SUBSTANCE: inventions group relates to the oil and gas industry and can be used in oil or gas production for thermal regulation of the produced fluid in order to combat asphalt-resin-paraffin and/or gas hydrate deposits in wells. While implementing the method, a hollow tubular loop, closed to a heat carrier source, is lowered directly into the well to the design depth, mainly below the beginning of the asphalt-resin-paraffin and/or gas hydrate deposits. The heat carrier from the tank by means of a pump under pressure from 0.1 MPa to 8 MPa is fed into the heat exchanger, which ensures the change in the temperature of the energy carrier to the specified temperature from -60°C to +200°C. The circulation of the heated coolant is maintained in a tubular loop under pressure while the well is operating until the temperature of the produced fluid along the length of the well is as close as possible to the isothermal flow, not lower than the melting temperature of asphalt-resin-paraffin and/or gas-hydrate deposits. The hollow tubular loop in the section of the coolant outlet from the source contains a pump with a drive and a frequency regulator, as well as a heat exchanger, which provides heating of the coolant to a predetermined temperature.

EFFECT: efficiency of heat transfer is increased, energy consumption is reduced.

2 cl, 2 dwg