METHOD FOR TREATMENT OF BOTTOMHOLE ZONE AND DEVELOPMENT OF WELLS AND JET INSTALLATION FOR IMPLEMENTATION THEREOF Russian patent published in 2024 - IPC E21B34/06 E21B37/06 E21B43/12 E21B43/25 

FIELD: pumps.

SUBSTANCE: group of inventions relates to the field of pumping equipment, mainly to well pumping units for testing, treatment and development of wells with delivery of equipment to the well bottom on tubing or on a flexible pipe string. Method of treatment of bottom-hole zone and development of wells with the help of jet installation includes assembly and lowering of installation into well on pipe string with installation of feather-funnel or filter in processed interval. Chemical reagent is pumped into pipes and adjusted to processed interval for treatment of bottomhole formation zone, packer is installed, and chemical reagent is forced into formation. Depression is created with a jet pump, and reaction products and formation fluids are pumped out from the formation with control of oil-water saturation. Sampling of formation fluids is performed. Pumping is stopped and pressure recovery curve is recorded. Assembly is lifted. Operations are carried out at successive switching of the state of the packer, the jet pump and the valves of the sampler. Unit is lowered and lifted with closed valves of the sampler, an unloaded packer and a connected bypass line of the jet pump nozzle. Injection of chemical reagent for treatment of bottomhole formation zone into pipes and finishing to treated interval is performed with open valves of sampler and unloaded packer and connected bypass line of jet pump nozzle. Chemical reagent is forced into the formation and the reaction of the chemical reagent with pressure treatment of the formation is waited for with open valves of the sampler, installed packer and disconnected bypass line of the jet pump nozzle. Creation of depression by jet pump, pumping of reaction products and formation fluids from formation, pumping out stop, extraction of formation fluids and recording of pressure recovery curve is performed with closed valves of sampler, installed packer and disconnected bypass line of jet pump nozzle.

EFFECT: increasing efficiency of barochemical treatment of bottomhole formation zone with variable pressure and well development, excluding wear of jet pump nozzle with acid.

2 cl, 3 dwg