PROCESS OF COMPLETION, EXAMINATION OF OPERATION OF WELLS Russian patent published in 2003 - IPC

FIELD: oil industry, completion, examination and operation of oil wells with use of pump and ejector systems. SUBSTANCE: process includes sinking of jet apparatus to bottom hole, pump-feeding of working fluid by ground pump into nozzle of jet apparatus, formation of differential pressure, provocation of inflow, ejection of well product to surface, separation of gas and fluid mixture at well-head, measurement of flow rate of formation fluid and monitoring of bottom-hole pressure under various operational conditions. Flow rate factor and area of outlet section of nozzle of jet apparatus are established before sinking. Injection pressure and flow rate of working fluid are measured while working fluid is pump-fed and bottom-hole pressure is calculated by given formula. Well is completed with use of water in the capacity of working fluid. After provocation of inflow from formation discharges of oil and stratal water are measured while certain ratio between flow rate of working fluid, oil output and discharge of stratal water is maintained by change of operation mode of ground pump and/or by change of well-head pressure. Jet apparatus is sunk on string of double tubing, working fluid is injected into nozzle of jet apparatus and well product is ejected to surface over channels of string of double tubing. Dynamic level of fluid as well as gas pressure in hole clearance between outer surface of double tubing and inner surface of well production string are monitored in process of completion, examination and operation of well. Measurement of bottom-hole pressure is duplicated with use of proposed ratio. EFFECT: widened application field of proposed technological process. 5 cl, 4 dwg