CEMENT SHOE ASSEMBLY FOR MONOBORE WELL

摘要

The present invention provides a cement shoe assembly (100) for use on a string of tubulars in a well. In one aspect of the invention, the cement shoe assembly includes a housing (110) having a lower portion (160) with an enlarged inside diameter and a drillable cement shoe (120) disposed therein. The shoe includes a weakened portion (171) of material adjacent the enlarged inside diameter portion of the housing and ensures that as a cutting tool passes through the housing, all portions of the cement shoe are removed from the enlarged inside diameter portion, leaving a connection surface clear of debris for a subsequent tubular string. When a smaller tubular is expanded into the enclosed diameter portion of the housing, a connection is made therebetween without enlarging the outer diameter of the housing.