公开(公告)号：US10450846B2

公开(公告)日：2019-10-22

申请号：US15855264

申请日：2017-12-27

Applicant: SHELL OIL COMPANY

Inventor： Matthew Jay Jabs ,  Antonius Leonardus Maria Wubben ,  Djurre Hans Zijsling

IPC: E21B33/12 ,  E21B43/10

Abstract: A hybrid push and pull method for expanding a tubular in a wellbore utilizes an expansion assembly with a sealed and another, optionally expandable, cone, wherein during at least part of the expansion process the sealed cone is moved up through the tubular by a combination of push and pull forces and the push force is generated by pumping fluid at an elevated pressure into a space between the bottom plug and the expansion assembly. This allows staged expansion of the tubular in a hard rock formation and/or of a tubular surrounded by a hardened cement lining and/or of a pair of partially overlapping nested tubular ends.