Submersible of pumping units for oil extraction, safety valves and check valves submersible pump units and apparatus for sealing an annular gap in the WELL

摘要

Technical solutions related to devices for the filtration of oil-water mixture of oil wells and may be used in the oil and gas industry, especially in the extraction of oil from peskoproyavlyayuschih wells for the protection of submersible pumping equipment from the effects of mechanical impurities contained in the pumped liquid, and pumping equipment protection from abnormal operating modes when clogged filter units and for their periodic cleaning. Submersible pump unit for oil extraction includes a submersible well pump, means for filtering the pumped liquid, and a safety valve configured to be connected to the annulus cavity pump unit, located behind the means for filtering the direction of travel of the pumped fluid when the pressure increases in annulus above a predetermined value. In this pump unit is provided with a check valve, located downstream from the pump while moving the pumped liquid, intended to limit the fluid flow, flowing from the column of tubing into the cavity of the pump when it is stopped. The achieved technical result is to increase the durability and reliability of the pumping unit, in particular, operated in abnormal conditions characterized by high content of solids in pumped; liquid, by providing a thin filtering the pumped liquid, realized by periodically cleaning the filter elements and reliable protection of the pump unit from emergency mode operation in case of clogging of the filter elements by particles of mechanical impurities. Safety valve submersible downhole pump assembly for oil extraction includes closure member for closing the opening for connecting the cavity with the casing annulus. The locking body is pressed by a spring with a predetermined force to an element body, wherein said aperture is satisfied. In this case the spring is placed in a cavity insulated from at least the main flow of the pumped liquid. The achieved technical result consists in providing effective protection of the pump unit from emergency mode operation in case of clogging of the filter elements by particles of mechanical impurities by providing the opening pressure of the safety valve job opportunities with the required precision during the life of the dripping. Check valve submersible downhole pump assembly for oil extraction includes the seat and closure member, which is configured with a hole intended for flow of formation fluid from the column of tubing into the pump cavity at its limit stop and for overflowing liquid flow. The achieved technical result is to allow periodic cleaning of the filter elements of the pump unit and the reference fluid flow, flowing from the tubing when flushing the filter with the required precision without complicating the structure and reduce the reliability of check valve. Device for sealing an annular gap in a well includes a pipe for; Fluid flow to the pump suction as well as annular sealing elements. The device is provided with a sleeve mounted on the pipe to be freely axially movable along said tube, and sealing elements secured to the outer surface of the sleeve. The achieved technical result consists in facilitating the shutter device into the well.; 20 ZP f ly-6-yl.