PROCESS OF ACCEPTANCE AND EXAMINATION OF WELLS, OF INTENSIFICATION OF OIL AND GAS INFLOWS, OF CONDUCTING WATER- INSULATION WORK AND GEAR FOR IMPLEMENTATION OF PROCESS Russian patent published in 2002 - IPC

FIELD: oil and gas industry. SUBSTANCE: first external row of tubing string including packer and body of gear are sunk into well. After leakage check of packer and tubing string by hydrostatic test central row of tubing string is lowered into well into external row of tubing string till it fits body of gear. Location branch pipe having conical outer surface is employed to fit and seal central row of tubing string in body of gear. Calibrated pressure testing plug installed in side inlet conduit of working chamber of gear which is common for all jet-type pumps arranged uniaxially around through conduit in body of gear is employed for pressure testing of external and central rows of tubing string sunk into well and packer. Intake conduits of gear are coupled by common conduit to mixing chamber of jet-type pumps. Gear is equipped with same number of jet-type pumps and non-return valves. Process of acceptance and examination of wells, of intensification of oil and gas inflows, of conducting water-insulation work is realized by way of formation of different variable depressions on pool by use of decrease of seam pressure by evacuation of fluid by jet-type pumps from central row of tubing string coupled to pool and having limited internal volume. Recording measuring equipment can be freely moved in well and in interval of productive pool. EFFECT: improved completeness and quality of operational information, reduced time of acceptance of wells, diminished expenditure of materials, possibility of conducting geophysical, hydrodynamic examinations, treatment of pool and water-insulation work in process of single sinking-lifting utilization of underground well equipment. 4 cl, 7 dwg