HYDRAULIC GUN FOR SEISMIC PROSPECTING Russian patent published in 1994 - IPC

FIELD: seismic prospecting. SUBSTANCE: hydraulic gun has base cylinder 1 with exhaust windows 2, intake windows 3 inside cylinder 5, electromagnetic valve 7. Inside base cylinder there is located continuous partition 14 forming pneumatic chamber 15. Piston 16 forms together with body acceleration chamber 17. On side of lower butt cylinder has nozzle 20 with neck 21, exhaust windows 22 and annular partition 23 coaxial to body. Air is relieved from acceleration chamber 17 with the help of expansion vessel 30 and duct 31 which are coupled to acceleration chamber by means of connection ducts 13 and 12. EFFECT: prolonged service life, simplified design and enhanced seismic efficiency thanks to reduction of losses of driving of fluid and diminished consumption of compressed air. 1 dwg