FIELD: oil producing industry.
SUBSTANCE: invention relates to jet plant for testing and completion of wells. Housing of jet pump accommodates nozzle and mixing chamber with diffuser. Output of diffuser is pointed to annulus, and nozzle of jet pump, to inner space of channel to supply working medium to jet pump. Channel to supply out medium in jet pump housing is connected to inner spaces of tubing string through ports. Check valve is installed in pumped out medium supply channel at input. Working medium flow selector is installed in housing of jet pump, being made in form of movable spring-loaded support bushing. Bypass holes and seating place for mounting sealing unit or functional inserts are made in support bushing. With support bushing in upper position, working medium and pumped out medium supply channels are closed by support bushing. With support bushing in lower position, upper end face is arranged below input into working medium supply channel. Bypass holes of support bushing communicate with input of pumped out medium supply channel. Sealing unit is made in from of stepped housing with sealing member and stepped piston spring-loaded relative to sealing member. Holes made in housing of sealing unit opposite to upper bypass holes of support bushing are closed by piston in its lower position. With piston in upper position and support bushing in lower position, pumped out medium supply channel communicates, through holes in sealing unit housing, upper bypass holes of support bushing and upper port in housing of jet pump, with inner space of tubing string higher than check valve and with inner space of tubing string lower than housing of jet pump. Lower bypass holes of support bushing communicate with lower port of pumped out medium supply channel. Channels for logging cable are made in piston and sealing member. With support bushing in upper position, working and pumped and pumped out medium supply channels are closed by support bushing. With support bushing in lower position, upper end face of support bushing is arranged lower than input hole in working medium supply channel.
EFFECT: improver reliability and increased capacity of plant.
3 dwg
