HYDRAULIC VALVE FOR USE WITH A PRESSURIZED HYDRAULIC FLUID SOURCE AND A SAFETY VALVE IN AN OIL WELL

摘要

THE INVENTION CONCERNS A HYDRAULIC VALVE FOR USE WITH A PRESSURIZED HYDRAULIC FLUID SOURCE AND A SAFETY VALVE MOUNTED IN A OIL WELL. HAS TWO ORIFICES122 AND 123 AND A CHANNEL 126, SO THAT AN OUTPUT OF THE BASE102 MAY BE CONNECTED TO A FIRST INPUT OF THIS BASE BY A FIRST ORIFICE122 OF THE SHUTTER121, AND THAT AN ACCUMULATOR (AC11) IS AVAILABLE IN THE BASE102 CAN BE CONNECTED TO A SECOND ENTRY OF THE LATEST THROUGH THE SECOND ORIFICE123 WHEN THE SHUTTER121 IS IN A FIRST POSITION. CHANNEL126 COMMUNICATES THE ACCUMULATOR (AC11) AND AN OUTPUT OF THE BASE WHEN SHUTTER 121 IS IN A SECOND POSITION. A DEVICE157 CONTROLS THE MOVEMENTS OF THE SHUTTER121 BETWEEN THE TWO POSITIONS. /P P FIELD OF APPLICATION: OIL AND GAS WELLS.