DEVICE FOR PROCESSING AND WELL DEVELOPMENT Russian patent published in 2016 - IPC E21B43/25 E21B28/00 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to equipment used in oil and gas industry, in particular, to devices for treatment of formation bottom hole zone with different agents and for well development. Device for well processing and development includes a cylinder with an inlet channel, an installed in the cylinder jet pump with a radial channel and a packer mounted on the cylinder and dividing the annular and below-packer space of the well. Jet pump is of an inserted type and is lowered into the well on the pipe string. At that, the inserted jet pump is equipped with an inlet channel communicating with the under-packer space of the well and equipped at the bottom by teeth, while the cylinder bottom is equipped with a rigidly attached bushing with side holes. Note here that a spring-loaded plate valve, and rigidity of spring poppet valve is located in the bushing, while rigidity of the poppet valve spring is adjusted by controlled by screwing and unscrewing of the nut screwed onto the lower end of bushing. Herewith, the inserted jet pump has the possibility of restricted axial downward movement relative to the cylinder during interaction of the teeth of the jet pump with the upper face of the spring-loaded poppet valve, compression of the spring and downward movement of the poppet valve, opening of the bushing side holes during well treatment, and tight closure of the bushing side holes by the spring-loaded poppet valve during well development. Note here that cylinder top has a conical surface tapering downwards for input of the inserted jet pump into the cylinder. Herewith, a fluid pressure sensor is installed under the packer in the under-parker are of the well providing for a possibility of switching on and off of the pump installed at the wellhead and actuating the jet pump by feeding working fluid.

EFFECT: technical result: simplified design, higher efficiency and reliability of device operation and higher quality of well development.

1 cl, 3 dwg