IMMERSIBLE PERCUSSIVE MACHINE Russian patent published in 1998 - IPC

FIELD: bore-hole drilling machinery and equipment. SUBSTANCE: this relates to devices intended for percussive-rotary drilling of bore-holes and it can be used in geological prospecting, hydrogeology, and in mining industry. Percussive machine is versatile with respect to energy carrier and it reliably operates on gas-liquid mixture such as aerated liquid, water, sandy mud of high density, and this widens its operating potentialities. Machine has body with sleeve, adapter with rod, union with anvil, striker which divides body space into direct stroke chamber and return stroke chamber. Also provided is system for distributing energy carrier among chambers having stepped feed-discharge valve with sealing member in the form of resilient-flexible ring which is secured on rod and is resting on valve end. Fluid flow lines are of feed, return, discharge, and control functions. Valve is provided with guide ribs made on outer surface which are resting on inner surface of body. EFFECT: higher efficiency. 2 dwg