Patent ID: 7493946

Claim:
An apparatus for expansion of a tubular, comprising: an expansion swage; an actuator; and at least two anchors, wherein at least one anchor is longitudinally moveable relative to the other anchor while both anchors are engaged with an inner diameter of the tubular, and wherein the at least one anchor is positioned between two stoppers, and wherein the stoppers are further positioned to limit longitudinal movement of the at least one anchor to between the stoppers; wherein the two stoppers are positioned at a distance allowing axial displacement of the at least one anchor between the two stoppers, and wherein the axial displacement is Δ, and further wherein Δ is defined by Δ = ( 2 3 ) · L · ( D ⁢ ⁢ exp - Do ) Do wherein L is a length of an expansion stroke of the actuator, Dexp is inside diameter of the tubular after expansion, and Do is the inside diameter of the tubular before expansion.