| 摘要 |
FIELD: oil producing industry. SUBSTANCE: invention relates to pumping facilities designed for production of oil. Proposed well jet plant contains packer with central channel and jet pump with active nozzle and mixing chamber with diffuser arranged in pump housing and channel for admission of working agent and for pumped out formation fluid, packer and pump are installed in tandem from bottom to top. Jet pump is provided with working agent flow direction selector made in form of changeable functional hollow shaped insert in form of sleeve with holes in side wall communicating through output with channel for pumped out formation fluid. Said insert is provided in upper part with valve spring-loaded relative to insert and made in form of cylindrical shell enclosing the insert and provided with holes in wall. With valve in upper position, holes of shell register with holes in side wall of sleeve and through said holes hollow insert is connected to inner space of tubing string from inlet side. Length is selector is not less than 1.2 of its outer maximum diameter. Output of jet pump is connected to string annulus. Nozzle of jet pump is connected through working agent admission channel to inner space of tubing string higher than insert, and channel for pumped out formation fluid is connected to inner space of tubing string lower than packer. Invention improves reliability and increase capacity of well jet plant at treatment of productive stratum. EFFECT: increased yield of production and intake capacity of injection wells owing to restoration of permeability of bottom hole zone. 2 cl, 1 dwg |
