FIELD: colmatage of permeable formations in well drilling. SUBSTANCE: installed on body is blade turbulator parallel to device axis. Main nozzle consists of two coaxially installed jet nozzles in radial channels. One jet nozzle is installed on blade while the other on the body and communicated with outer zone of casing string-borehole annulus by means of channel for injected flow. Lower part of turbulator blade from the inflowing side below hole inlet for injected flow and above lower edge is made in form of trough-trap with two-sided screw surface. EFFECT: higher efficiency. 3 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| DEVICE FOR COLMATAGE OF WELL WALLS | 1991 |
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| GEAR FOR MUD INJECTION INTO HIGH-PERMEABLE SEAMS | 1993 |
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| MUD GROUTING DEVICE | 1996 |
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