Abstract: Systems and methods for monitoring a position of a service tool in a wellbore are provided. The service tool can have a sensor assembly coupled thereto and be positioned within the wellbore. The service tool can be moved within the wellbore. The distance travelled by the service tool in the wellbore can be measured with the sensor assembly. The position of the service tool in the wellbore can be determined by comparing the distance travelled to a stationary reference point.

Abstract: An improved pipeline caliper pig for providing a record of the deviations of the interior wall of a pipeline including a pig body assembly having a longitudinal axis and support members so that the pig body assembly is supported within a pipeline, the support members impeding the flow of fluid therepast so that the pig body is propelled by fluid flow along the pipeline interior, an integrator plate carried by the pig body assembly, arms extending from the pig body assembly for responding to deviations in the interior wall of the pipeline and coupling members to transfer the deviations to the integrator plate, a plurality of axially positionable shafts affixed at one end to the integrator plate, and electrical transducers at the other end of each shaft so that movement of the integrator plate relative to the pig body is transmitted into electrical signals, an orientation detection member and a signal receiver and recorder to record the electrical signals of the transducers and the orientation detection member

Abstract: A pipeline bend detector pig for measuring the changes in direction of a pipeline having a first pig body assembly with an imaginary longitudinal axis and spaced apart resilient cups for supporting the pig body assembly in a pipeline so that the axis thereof is at least approximately the axis of the pipeline and for impeding flow of fluid past the pig so that the pig is propelled by fluid flow through the pipeline, and a second pig body assembly also having an imaginary logitudinal axis and means for support thereof within a pipeline so that the axis thereof is at least approximately the axis of the pipeline, a universal joint connecting the front end of the second pig body assembly to the rear end of the first pig body assembly and an integrator plate and finger assembly with the first pig body assembly arranged so that the fingers are deflected upon the deflection of the internal wall of the pipeline to thereby deflect an integrator plate, an instrument responding to the deflection of the integrator plate,