DEVICE FOR IMPLOSIVE TREATMENT OF STRATUM Russian patent published in 2014 - IPC E21B28/00 E21B43/25 E21B33/12 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry, in particular, to the area of secondary recovery for productive stratum by vacuum. Device for implosive treatment contains a hollow housing with depression chamber and packer included into it. Cover is installed at the housing telescopically and fixed by a shear bolt; the cover is connected from the bottom to a rod with variable section and has a limiter. Limiter can interact with inner protrusion of the housing. At that rod with variable section can interact with overflow opening in the housing. The cover is connected to pipe string from the top. The rod with variable section is hollow and it communicates inner space of the pipe string with depression chamber. At that hollow rod with variable section has conical surface tapering bottom-up and having slope angle of 10-20°. The packer is made as interchangeable metal rings and rubber barrel-type seals.

EFFECT: improving reliability and efficiency of the device operation and excluding contamination of the wellhead site with products of implosive treatment.

2 dwg