Patent ID: 8505630
Filing Date: 2013-08-13
Classification: C04B,C09K,E21B,Y02W

Abstract:
1. A method of displacing a drilling fluid disposed in a well bore annulus, comprising: providing a spacer fluid comprising a kiln dust, wherein the spacer fluid has at least one property at well bore conditions, wherein the property is selected from the group consisting of: (i) a yield point of from about 25 Pascals to about 250 Pascals, (ii) a static gel strength of from about 70 lbf/100 ft using the spacer fluid to displace at least a portion of the drilling fluid from the well bore annulus; and allowing at least a portion of the spacer fluid to consolidate in the well bore annulus, and wherein the portion of the spacer fluid consolidates in the well bore to meet the property.