FIELD: well drilling, particularly devices for permeable reservoir isolation and well bore preparation for cementing.
SUBSTANCE: device comprises hollow body. Safety deplastering ribs are arranged on outside body surface. Ribs have radial orifice to receive vortex pipe and swirl chamber opened in space beyond the body and communicated with body interior by one or several tangent channels. In the second variant separator is installed over vortex pipe to separate body interior into two halves having increased and excessive pressure. The halves are connected through peripheral spiral separator channels. In the third variant safety deplastering ribs have several radial orifices located at different levels along hollow body height and adapted to receive serially arranged vortex pipes.
EFFECT: increased efficiency, reliability and service life.
22 cl, 9 dwg
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