IN-PIPE MULTI-CHANNEL CALIPER PIG Russian patent published in 2014 - IPC G01B7/28 

FIELD: oil-and-gas industry.

SUBSTANCE: set of invention relates to in-pipeline test-and-control devices equipped with power supply, meters, data processors and storages to be displaced inside pipeline by transferred fluid flow. In-pipe multi-channel caliper pig consists of one section composed by case with support disc arranged thereat, suspension wheels, collar and at least one belt of measuring spring-loaded levers. Besides, metal case of caliper pig accommodated power supply and section of electronics. The latter represents a sealed shell accommodating storage battery unit, electronics unit, strapdown inertial navigation system built around fibre optic gyros and the system of micromechanical accelerometers arranged in single-pin suspension, onboard data storages and marker onboard transceiver. Method of in-pipe measurement consists in displacement of in-pipe multi-channel caliper pig by transferred product flow. Said caliper displacing in pipeline measures the inner profile by intermittent registration of angle of deflection of levers. Besides, pipeline spatial position is defined by strapdown inertial navigation system built in electronics unit.

EFFECT: higher data quality and validity.

16 cl, 6 dwg