Thermo-ultrasonic coupling for preventing asphalteneene-resin-paraffin deposits in production wells

Abstract

A thermal-ultrasonic coupling for preventing deposits of asphaltene, resin and paraffin substances in production wells. The thermal-ultrasonic coupling for preventing deposits of asphaltene, resin and paraffin substances in production wells comprises a housing with an axial through-channel and threaded ends. The inner surface of the axial channel has a nickel-phosphorus-based anti-adhesive coating. The coupling also contains a passive heat transfer element designed to receive heat from the well's downhole equipment and transfer it to the wall of the axial channel through good thermal contact and high thermal conductivity: a metal insert / heat pipe brazed to the heat transfer zone. A thermoelectric generator (TEG) is connected to the passive heat transfer element on the heating side, and the other side is connected to the well's environment. One side of the TEG is equipped with a temperature differential amplification unit, including radial fins or an ejector heat exchanger. The electronic control module is equipped with a power path. The annular ultrasonic unit is comprised of at least four sector piezoelectric elements, acoustically coupled to the axial channel wall via a contact belt. The annular ultrasonic unit is acoustically coupled to the axial channel wall with a sound emission frequency of 15–120 kHz. The technical result is a reduction in the rate of deposition of asphaltene, resin and paraffin substances.