PACKER LOCK Russian patent published in 1999 - IPC

FIELD: oil-producing industry, particularly, locking units of packers. SUBSTANCE: packer lock has stem with recess of toothed profile and limiting stops. Stem locking cone with ports. Located in ports are flat springs and latches. Force unit is connected with stem. Lock has sleeve which is fastened on locking cone and form cavity together with it, which is opened from atop. Lock also has locking bushing installed on locking cone in extreme lower position and closes ports of locking cone. It may be moved axially up to limiting stop and to open ports. Installed in ports are dogs, or dogs with intermediate supports. They rest on closed position concurrently on locking cone and locking bushing. Lower generating lines of ports of locking cone are not square to packer axis and are inclined towards outside. Recess on stem is made spiral. Sealing devices are installed between sleeve, locking bushing, locking cone and stem, which are all installed with running fit. EFFECT: ensured required working loads and extended packer technical characteristics as a whole. 5 cl, 2 dwg