WELL VIBRATION HAMMER Russian patent published in 2017 - IPC E21B31/113 

FIELD: oil industry.

SUBSTANCE: invention relates to oil and gas industry, specifically, to borehole vibration mechanisms of extraction of filters and other tubular structures. Device includes a hollow housing, connected to upper and lower anvils, cylinder with seat and radial holes, rigidly connected in lower part to housing and installed above upper anvil, hammer located between upper and lower anvils, piston with seals, rigidly connected with a hammer and arranged in cylinder to form an above-piston cavity, spring-loaded outlet valve with external seat, inner housing, installed above cylinder, spring-loaded inlet valve with inner and outer seats, seal and through channel installed in inner housing. Hammer comprises a damping bushing in space between hammer and upper anvil, between hammer and lower anvil, a nozzle, rigidly connected to upper part of housing. On external surface of nozzle is installed an apron and lock ring. Hollow housing is detachable, and its parts are rigidly interconnected to upper anvil. In lower part hollow housing is rigidly connected to lower anvil in form of nozzle with outer thread in lower part. Under upper and lower anvils there are radial holes. Piston in upper part comprises a rod. Spring-loaded outlet valve is installed on rod to displace axially relative to latter. Upper part of outlet valve is made in form of a cap. Inner housing in upper part is rigidly connected with nozzle and has longitudinal and radial slots. Inner housing has a through channel, hydraulically connected with through channel of spring-loaded intake valve. Spring of intake valve is arranged in through channel of inner housing, above spring is installed a diaphragm with inner hole.

EFFECT: higher reliability and efficiency of hammer.

1 cl, 1 dwg