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variable among different company's tools: Service companies <br />should be able to provide accurate estimates of travel times <br />for frees pipe of a given size and weight. Travel time is <br />required as a quality control measurement. Record the <br />travel time on the 3 foot spaced receiver. <br />Variable density (VDL) - Pipe signals, formation signals, <br />and fluid signals are usually easy to recognize on the VDL. <br />If these signals can be identified, a practical <br />determination for the presence or absence of cement can be <br />made. VDL is logged on the 5 foot spaced receiver. <br />Casing collar locator (CCL) - Used to correlate the bond log <br />with cased hole logs anti to match casing collars with the <br />collars that show up on the VDL portion of the display. <br />Gamma ray - Used to correlate the bond log with other logs. <br />PART III - LOGGING TECHNIQUE <br />Calibrate the tool in fx-ee pipe at the shop, prior to, and <br />following the log run. Include calibration data with log. <br />Run receivers spaced 3 feet and 5 feet from transmitter. - <br />Run at least 3 bow-type or rigid aluminum centralizers in <br />vertical holes, 6 centralizers in directional holes. A CCL <br />is not an adequate centralizer. <br />Complete log header with casing/cement data, tool/panel <br />data, gate settings and tool sketch showing centralizers. <br />Set the amplitude gate so that skipping does not occur at <br />amplitudes greater than 5 mV. <br />Record amplitude with fixed gate and note position on log. <br />Record amplified amplitude on a SX scale for low amplitudes. <br />Record amplitude and travel time on the 3 foot receiver. <br />Record travel time on a 100 us scale (150 - 250, 200 - <br />300). <br />Logging speed should be approximately 30 ft/min. <br />Log repeat sections. <br />Printed on Recycled Paper <br />