DEVICE TO PREVENT FORMATION OF PARAFFIN AND HYDRATE DEPOSITS IN OIL WELLS Russian patent published in 2016 - IPC E21B36/00 E21B43/24 F28D7/10 

FIELD: oil industry.

SUBSTANCE: invention relates to oil production and can be used for heating of high-viscosity and waxy oil directly in the well. Device for prevention of formation of paraffin and hydrate deposits in oil wells contains heat generator connected through suction and pressure pipelines of circulation pump to well heater, which is integral part of tubing string. Wherein heater is a housing consisting of outer and inner walls, mounted coaxially with annular gap and forming a cavity for heating coolant, supply and discharge manifold with nozzles, inside of which there is an additional heat exchange element. Additional heat exchange element is composed of two cylindrical shells installed coaxially and connected to each other. Wherein at the ends of additional heat exchanging element there are pylons, in which there are channels for supply and removal of heating coolant.

EFFECT: technical result is increasing efficiency of production of high viscous and paraffin oil.

1 cl, 4 dwg