E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 17/14 (2006.01) E21B 17/04 (2006.01) E21B 43/10 (2006.01)
Patent
CA 2756623
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.
Boudreaux Joseph Jude
Dupre Thomas A.
Hebert John Emile
Seely Patrick John
Marks & Clerk
Weatherford/lamb Inc.
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