DEVICE FOR IMPLOSIVE TREATMENT OF FORMATION Russian patent published in 2002 - IPC

FIELD: oil producing industry, particularly, secondary stimulation of producing formation by vacuum. SUBSTANCE: device has hollow body accommodating depression chamber and packer. Telescopically installed on body and locked by shear screw is a cover which is connected with rope, additional depression chamber and hollow rod of variable cross-section. Rod has limiter and connects body depression chamber with additional depression chamber. Rod is installed for engagement with body overflowing hole. Rod limiter is engageable with body. Its cylindrical surface has packer and receiving holes located below packer. Axial motion of packer relative to device body is limited by body stop from one side, and by cover from the other side. EFFECT: reliable and efficient operation in any interval of well down to its bottom with comparably simple design of device and minimal material expenditures. 1 dwg