DEVICE FOR WELL DEVELOPMENT AND AFFECTING BOTTOMHOLE FORMATION ZONE

摘要

FIELD: oil industry.;SUBSTANCE: invention relates to oil and gas industry and is intended for affecting bottom hole formation zone and well development. Device includes working pipe, forming together with production string annular space, packer, disconnecting annular space with under-packer zone, jet pump, which suction chamber is connected to under-packer zone, and check valve connecting under-packer area with working pipe. Output of jet pump is communicated with working pipe equipped with bottom pressure gauge, connected by means of geophysical cable to ground logging station. Input of jet pump is communicated with annular space. For development of well jet pump is inserted and is equipped with check valve from below. Inserted jet pump has possibility of tight arrangement in housing, launched to well on working pipe. At wellhead working pipe is hydraulically connected with vessel equipped with blind vertical partition that separates reservoir into two sections of water and oil. In reservoir below there are two branches. First branch in vessel is made of water section and is connected with piston pump, which is hydraulically communicated with annular space. Second branch in vessel is made of oil section and is connected to collector for oil. Container opposite water section is equipped with upper and lower level sensors. When water level in tank rises to upper water level sensor piston pump supply in annular space is reduced. At reduction of water level in tank to lower water level sensor piston pump to annular space supply is increased. Under effect on bottom hole formation zone inserted jet pump has possibility of its extraction from well by means of catcher lowered into working tube on cable with gripping by outer annular recess made on upper end of inserted jet pump.;EFFECT: technical result is simplification of device, higher reliability of its operation and improved quality of well development.;1 cl, 2 dwg