A field test of one company's various Cement Bond Log tools was run to evaluate the effect of varying signal frequencies and tool diameters. Two larger diameter sondes with different frequencies were run and results are presented. One higher frequency, smaller diameter tool was run and results are compared with the other logs. Problems that occurred during the test (and that also occur in the field) included the microannulus effect, centering and gating difficulties. The main conclusion of the test was that this particular small diameter tool was pessimistic. The larger diameter conventional bond log tool available from this company should be run whenever casing diameter permits.

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