- Patent Title: Hybrid push and pull method and system for expanding well tubulars
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Application No.: US15855264Application Date: 2017-12-27
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Publication No.: US10450846B2Publication Date: 2019-10-22
- Inventor: Matthew Jay Jabs , Antonius Leonardus Maria Wubben , Djurre Hans Zijsling
- Applicant: SHELL OIL COMPANY
- Applicant Address: US TX Houston
- Assignee: SHELL OIL COMPANY
- Current Assignee: SHELL OIL COMPANY
- Current Assignee Address: US TX Houston
- Main IPC: E21B33/12
- 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.
Public/Granted literature
- US20180119527A1 HYBRID PUSH AND PULL METHOD AND SYSTEM FOR EXPANDING WELL TUBULARS Public/Granted day:2018-05-03
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