Shoe track saver

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E - Fixed Constructions

21

B

E21B 33/13 (2006.01) E21B 33/14 (2006.01)

Patent

CA 2303734

An inline component for a liner assembly, usable particularly in deviated wellbores, is disclosed. The component involves a series of offset passages to create sufficient turbulence in the circulating cement during a cementing job so as to eliminate the phenomenon of roping where there is inefficient displacement of mud with the circulating cement. The multi-component inline device has peripheral seals to prevent leakpaths along the inside wall of the casing being cemented. The offset flow passages are presented in individualized components which are rotationally locked to each other and have peripheral sealing devices. The stack of components is retained within the casing to prevent its longitudinal movement during the pumping of cement. The preferred materials are soft metallics which facilitate drilling out if required. The interlocking nature of the components also eliminates relative rotation to facilitate drill-out.

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