METHOD AND APPARATUS FOR EVALUATING THE CEMENTING QUALITY OF A BOREHOLE

摘要

The invention relates to an apparatus and a method for evaluating the cementing quality of a borehole (10) by applying an ultrasound signal to the cement from inside a borehole casing (12) and recording the signal with at least one ultrasound receiver (26), wherein the at least one receiver (26) is an optical fiber placed within the annulus (16) between casing (12) and formation rock (14) and embedded in the cement.