DEVICE FOR INJECTION OF ISOLATING MATERIAL INTO WELL Russian patent published in 2003 - IPC

FIELD: oil and gas producing industry, particularly, devices for isolation of producing formations, elimination of annular space crossflows and restriction of water inflow to oil and gas wells. SUBSTANCE: device includes body with holes, scaling member, lower and upper cones and slips in form of holders, shutoff valve, retainer and adjusting mechanism in form of cylinder with filling holes and pusher located on cylinder. Retainer is located in adjusting mechanism. Piston on shear members is secured in adjusting mechanism. Cylinder of adjusting mechanism is secured in body by shear members. Installed on shear members in cylinder internal cavity is plug which is retained by spring and closes cylinder filling holes and body holes. Secured to body lower part is stop engageable with lower slip. Shutoff valve is made in form of bushing with retainer and bottom, and secured on shear members in lower part of adjusting mechanism. Bushing has limiter of its motion. EFFECT: higher efficiency and reliability of device in injection of isolating material into well under high pressure. 2 cl, 4 dwg