Remote controlled actuation device

摘要: An actuator for an appliance associated with a ducted body, through the duct of which flows incompressible fluid, includes differential piston axially moveable within and operatively connected to appliance. The has tubular shape central bore first profiled throttling portion minimum internal diameter is smaller than duct. A protruding element secured in body disposed coaxially cooperates therewith selectively increasing loss head fluid as it direction circulation. spring arranged between part drill-string biasing movement opposite circulation fluid. measurement device provided measuring pressure at end drill-string. can serve actuation orientation orienting drilling tool also actuating stabilizer set drill rods.