DEVICE FOR INJECTION OF FLUID INTO BED Russian patent published in 2015 - IPC E21B43/14 E21B34/10 F16K17/06 

FIELD: oil and gas industry.

SUBSTANCE: device includes a hollow case with a discharge channel and protrusion from below, a barrel placed coaxially inside the hollow case and designed for axial movement, a replaceable jet nozzle and a valve passing fluid inside-out. The hollow case is equipped with inner circular breakdown, the barrel is equipped with an outer circular bore with a locking ring installed in it; the barrel is fixed in regard to the hollow case by a shear tie. On the top the barrel is equipped with a plug catching baffle for a ball thrown to the flow string. Opposite the discharge channel in the hollow case there is an adjustable valve mounted eccentrically; the valve consists of a spring-actuated piston with a rod and an adjusting nut. Below the piston in the valve there is a hydraulic chamber, which can be interconnected to inner space of the hollow case, at that under excess pressure in the hydraulic chamber the piston can be moved axially upwards thus interconnecting the hydraulic chamber to the bed through an outlet opening of the valve, which is equipped with a replaceable jet nozzle and screwed into the outlet opening of the valve.

EFFECT: more reliable operation of the device.

2 dwg