FIELD: oil industry, namely, engineering of equipment for oil wells, possible use for maintaining optimal thermal and chemical modes in said wells to prevent and remove paraffin-hydrate sedimentations on internal surface of tubing pipe.
SUBSTANCE: in accordance to method, linear heating element is lowered into well. Sedimentations are heated up to melting temperature. In accordance to invention, as linear heating element, load-carrying geo-physical cable with central capillary is used. Chemical reagents are fed through the capillary to facilitate destruction of sedimentations. Device contains linear heating element, including at least two power elements, positioned in cover and connected to power source. In accordance to invention, as linear heating element, load-carrying geophysical cable is used, direct and reverse conductors of which are made in form of metallic ribbons, applied along screw line with opposite winding direction and with gap for creation of thermal losses in wired magnetic armor of cable under effect of high frequency current, which armor acts as heat-dissipating element. Inside direct conductor of cable, central capillary is located for feeding chemical reagents into well. Isolating cushion for armor is positioned above reverse conductor.
EFFECT: maintained optimal ratio of thermal and chemical conditions in well, prevention and removal of paraffin-hydrate and other sedimentations in wells with possible geo-physical measurements during removal of sedimentations, usage of less thermo-resistant isolation and simultaneous feeding of chemical reagent into well.
5 dwg
