Abstract: The invention provides a method and system for radially expanding a tubular element below a previous tubular element.

Abstract: The invention provides a method and system for radially expanding a tubular element below a previous tubular element. The method includes: connecting a downhole section to an uphole section of the tubular element, the downhole section having a smaller diameter than the uphole section; bending a downhole end of the downhole section radially outward and in axially reverse direction to form a start expanded tubular section extending around an unexpanded part of the downhole section; arranging said start expanded tubular section at least partially within a downhole end of the previous tubular element; anchoring said start expanded tubular section to the previous tubular element; and increasing the length of an expanded tubular section of the tubular element by pushing an unexpanded tubular section downhole relative to said start expanded tubular section to expand the unexpanded tubular section by bending the wall of the unexpanded tubular section radially outward and in axially reverse direction.

Abstract: The invention provides a system for lining a wellbore, and a method for using said system. The system comprises: a drill string (20) for drilling the wellbore; an expandable tubular element (4) enclosing the drill string, wherein a lower end portion of a wall of the expandable tubular element is bent (14) radially outward and in axially reverse direction to define an expanded tubular section (10) extending around an unexpanded tubular section (8); a pushing device (50) for pushing the unexpanded section into the expanded tubular section; a blow-out preventer (302) for closing off the wellbore in case of an emergency. Herein the blow-out preventer encloses the unexpanded tubular section and comprises a cutter (320) for cutting the unexpanded tubular section and at least one closure device (324) for closing the wellbore.

Abstract: The invention discloses a system (FIG. 1) and a method for lining a wellbore. The system comprises a drill string (20) for drilling the wellbore; an expandable tubular element (84) enclosing the drill string (20), wherein a lower end portion of a wall of the expandable tubular element (14) is bent radially outward and in axially reverse direction to define an expanded tubular section (10) extending around an unexpanded tubular section (8); a pushing device (42) for pushing the unexpanded tubular section (8) into the expanded tubular section (10); and a releasable drilling annulus sealing device (70) for closing an annular opening between an upper end of the expandable tubular element and the drill string.