demonstrated by u s pat no 6 305 467 incorporated herein by reference casing collar locator unit 90 houses an electromagnetic coil assembly 95 as the coiled tubing 22 is raised or lowered in the well 10 and tool positioning assembly 24 passes through a casing collar 21 of the production tubing string 20 the electromagnetic coil assembly 95 electromagnetically senses the magnetic anomaly of casing collar 21 the electronic circuit boards and other components generate a momentary electric output signal which is received by control unit 110 in one embodiment control unit 110 interprets the electric signal received from casing collar locator unit 90 and in real time directs communication unit 120 to alter fluid pressure by operation of electromagnetic valve 124 in a predetermined pattern the opening of electromagnetic valve 124 permits fluid communication between fluid chamber 125 and passageway 76 the fluid pressure within fluid chamber 125 moves poppet valve 126 upwards blocking at least the majority of fluid passing through passageway 122 the blockage of fluid flowing through passageway 122 produces a pressure pulse within passageway 76 and coiled tubing 22 the coordinated opening and closing of electromagnetic valve 124 produces a series of pressure pulses detectable by pressure sensor 58 data acquisition system 46 interprets the pressure pulses and provides the means for correlating the earlier well log to the data provided by tool positioning assembly 24 thereby providing.