| 摘要 |
FIELD: bore-hole drilling machinery and equipment. SUBSTANCE: for higher reliability and operating efficiency of bore-hole drilling device due to most full utilization of ball energy, jet apparatus is located eccentrically inside housing and is rigidly fastened at angle of 20-7 deg. with respect to stopper which is connected to string of drilling pipes. Jet apparatus can move in circle relative to vertical axis of device. In this case, lower end face of accelerating chamber of jet apparatus is not going beyond vertical axis of device. Hopper which is rigidly fastened to accelerating chamber is made in the form of hollow cylinder located coaxially with housing. Upper part of hopper is configured as hollow truncated elliptical cone with circular base. EFFECT: higher efficiency. 1 dwg
|
