method for treating a loss zone during drilling or coating passage, method for treating loss zones with a treatment fluid during drilling or coating passage and method for treating loss zones in a well during drilling or coating passage with a fluid of treatment

摘要

a method for treating lost circulation problems arising from loss zones during the drilling and cementing process by the use of a thixotropic cement. The method comprises the steps of finding a loss zone in a well during drilling or sheathing and pumping a treatment fluid into the loss zone, wherein the treatment fluid is a gel capable of gelling, breaking when sheared, and build shear strength back after the shear is removed.