Patent ID: 9057230
Filing Date: 2015-06-16
Classification: E21B

Abstract:
1. An apparatus comprising at least one single expandable tubular comprising at least one partial centralizing ring formed in a middle section of the tubular having a pre-expansion outer diameter greater than a pre-expansion outer diameter of the remainder of the expandable tubular, wherein the tubular comprises at least one complete centralizing ring and at least one additional partial centralizing ring, wherein said at least one complete centralizing ring or at least one partial centralizing ring has said pre-expansion outer diameter greater than the pre-expansion outer diameter of the remainder of the expandable tubular and smaller than or equal to casing drift or well drift; wherein, upon radial expansion, the at least one complete centralizing ring or the at least one partial centralizing ring has an expanded outer diameter substantially equal to an expanded outer diameter of the remainder of the expandable tubular, and wherein the expanded outer diameter is greater than the pre-expansion outer diameter of the remainder of the expandable tubular.