DEVICE FOR BRINGING PACKER SEALING MEMBER IN OPERATION Russian patent published in 1997 - IPC

FIELD: oil and gas industry. SUBSTANCE: this is intended for separation of beds. Device has body - pipe union with cylindrical space and holes and spring-loaded spool. Spool is provided with limiters of its displacement. In addition, spool is made in the form of piston with axle. Mounted on axle is bush with stops which are displaced relative to each other. Located between stops is step-like limiter of axial displacement. Limiter is made in the form of split ring with shaped slots. Device permits repeated creation and removal of surplus pressure in casing string. It is reliable in operation, simple in design and is of wide application. EFFECT: high efficiency. 5 dwg