US Patent 7117941 Variable diameter expansion tool and expansion methods
Patent 7117941 was granted and assigned to Halliburton on October, 2006 by the United States Patent and Trademark Office.
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The present inventions relate to improved apparatus and methods for radially expanding tubulars, such as tubing, casing and sand-control screen assemblies in a subterranean oil or gas well, and more specifically, to a variable diameter expansion tool for expanding downhole tubulars to varying diameters. In general, the inventions provide apparatus and methods for radially expanding a tubular, such as pipe, tubing, screen or screen assembly, deployed in a subterranean well by moving an expansion tool axially through the well. An automatically infinitely variable-diameter expansion cone tool is provided. A variable-diameter cone is provided, movable between an expanded position and a retracted position. The cone is enlarged to its expanded position and advanced through expandable components until a restriction is reached. At the restriction, the variable-diameter cone automatically retracts enough to allow the tool to continue advancing through the wellbore. When the restriction is past, the variable-diameter cone enlarges again to its expanded position.
US Patent 07117941 Variable diameter expansion tool and expansion methods US Patent 7117941 Variable diameter expansion tool and expansion methods
US Patent 07117941 Variable diameter expansion tool and expansion methods
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