Bond Strength of Cement Borehole Plugs in Salt.

摘要

The report presents results of a series of push-out tests performed on cement plugs emplaced in salt cores. Two types of cement have been tested in salt cores drilled from blocks obtained from a mine in a bedded salt formation. Eighteen samples have been submitted to short-term (up to 34 days) drying and rewetting (for 8 to 28 days) after they had been pushed to failure (slip). Depending upon the reconditioning history, retested strengths range from 18 to 105% of the initial strength, with an average value of about 60%.