FIELD: mining industry; applicable for improvement of work of drilling personnel in round-trip operations. SUBSTANCE: hydraulic drain adapter bushing is of a step type with radial channels and inclined recess on the external surface, and body has radial channels combined in the initial position with radial channels of bushing and protrusion on the internal surface located in the bushing inclined recess. EFFECT: higher reliability and efficiency of the device due to simplified design and reduced metal content. 2 cl, 3 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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|
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| DISCONNECTING DEVICE | 1992 |
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| DRAG DRILL BIT | 1992 |
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| DEVICE FOR HYDRAULIC FRACTURING OF FORMATION | 1992 |
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| METHOD FOR CLEANING FILTERING TUBES OF A WELL | 1992 |
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| ROCK-BREAKING TOOL FOR DRILLING WITH REVERSE CIRCULATION OF CLEANING AGENT | 1991 |
|
RU2010940C1 |
