FIELD: well drilling. SUBSTANCE: non-return valve of mining mechanisms has the body. The deflector and an elastic locking member with a stepped portion and a cone portion, closing an annular gap "a", are mounted in the body with the annular gap. The elastic locking member rests upon an end of the deflector, and, preventing its own axial motion, closes the non-return valve of the mechanism. EFFECT: enhanced reliability. 2 cl, 1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD AND DEVICE FOR ORIENTING DEFLECTING TOOL OF HYDRAULIC FACE ENGINE | 1991 |
|
RU2027850C1 |
| CORE EXTRACTING ENGINE | 1992 |
|
RU2046177C1 |
| DEVICE FOR DIRECTIONAL DRILLING | 1993 |
|
RU2081987C1 |
| SCREW DOWNHOLE MOTOR | 1992 |
|
RU2035582C1 |
| THRUST BEARING FOR FACE MOTORS | 1990 |
|
RU2011777C1 |
| 0 |
|
SU1781404A1 | |
| SLUDGE TRAP | 0 |
|
SU1665018A1 |
| SPIRAL BOTTOM-HOLE MOTOR FOR DIRECTIONAL DRILLING | 1993 |
|
RU2081986C1 |
| SPIRAL CORE-TAKING MOTOR | 1994 |
|
RU2087661C1 |
| BY-PASS VALVE OF DRILL STRING | 0 |
|
SU1657582A1 |
