While drilling in the Hartha Formation, a major operator incurred total losses. An offset well was delayed for more than 5 days while curing similar losses with cement plugs, so the operator sought a more efficient solution for the new well. M-I SWACO proposed squeezing a FORM-A-BLOK high-performance, high-strength lost circulation pill into the thief zone to prevent further losses and strengthen the wellbore sufficiently to enable the operator to continue normal pull-out-of-hole operations and run 9 5/8-in casing to section TD of 2,122-m MD.