... Lithology acquisition, strata division GJ-451/SGJ-451 Cementing probe1.Check cementing quality2.Working mode:nondirecting measurement 3.Measuring range of ... of strata, and if execute the acoustic logging, we may check out the cement glue quality of borehole tube. 1. Measurement range ... have a content of potash, anhydrite or U, and find out the non-radiate minerals such as salty rock, non-water ...