DOWNHOLE LOAD SENSOR

摘要

FIELD: well survey, particularly to control forced instrument movement along horizontal well bore, particularly during coiled tubing device operation. ^ SUBSTANCE: load sensor comprises body with head sliding in axial direction and connected with power spring. The power spring is installed in body, moves in guiding means and connected with load sensor provided with through electric coupling and power source. Pressure sensor is made as ultrasonic emitter with pick-up plane and having reflecting mirror fixedly connected to power spring end facing emitter and spaced minimal distance therefrom. Inner body surface in working radiation zone is covered with ultrasound absorbing material applied within the limits of string travel length. Guiding springs are spaced apart from above covering. Sensor outlet is connected to temperature-compensated converter. ^ EFFECT: increased structural reliability and load measuring accuracy. ^ 1 dwg