Patent ID: 8136594
Filing Date: 2012-03-20
Classification: C09K,E21B

Abstract:
1. A method for releasing a chemical in a well bore, comprising the steps of: providing a casing string; coupling a housing member to the casing string, wherein the housing member is coupled to a chemical reservoir, wherein the housing member and the casing string are configured so that rotation of the casing string and a cutting instrument coupled to the casing string initiates the releasing of the chemical from the chemical reservoir; introducing a fluid into a space between an inner surface of the well bore and an outer surface of the casing string; releasing a chemical from the chemical reservoir into the fluid; wherein the fluid comprises a non-activated cementitious material and wherein the chemical comprises an activation agent; and wherein the chemical is first introduced into the fluid upon its release from the chemical reservoir into the fluid in the space between the inner surface of the well bore and the outer surface of the casing string.