CEMENT SLURRIES, UNAFFECTED BY SALTS OF MAGNESIUM, FOR CEMENTING WELLS TRAVERSING SALT FORMATIONS, AND RELATED CEMENTING PROCESSES

摘要

ABSTRACTThe slurries according to the invention contain: 18%NaCl; Na silicate and an agent of compatibility withmagnesium consisting of H3PO4 and HEDP diphosphonate.Thickening time is not affected by the presence orabsence of salts of magnesium, up to 30% of bischofiteequivalents. The rheology of the slurry and the compressivestrength of the cement are also practically unaffected bymagnesium contamination or the lack thereof.