| 摘要 |
FIELD: well drilling. SUBSTANCE: exhaust pipe is made in the form of cylinder 20 with radial slots 22 and 23 and blind bottom 21, secured in central channel 18 of drill bit 17 on the side of open face. Accumulating chamber 24 open to travel chamber 13 is formed beyond blind bottom 21 of cylinder 20 in the central channel of striking piston 12. EFFECT: enhanced operate reliability and striking capacity at the expense of simplified exhaust path, enhanced strength of the exhaust pipe made in the form of blind bottom cylinder and radial slots, simplified design of striking piston, as well as due to increased accumulating volume of travel chamber. 2 cl, 1 dwg |
