Shell Oil Comapny

Walter Stam

Antonius Leonardus Maria Wubben

David Paul Brisco

Djurre Hans Zijsling

In an assembly for lowering and expanding a tubular element in a borehole on an expansion string, at least part of the weight of the tubular element is transmitted to the expansion string via an internal upset and a support protruding from an outer surface of the expansion string below the internal upset.

Assembly and method for creating an expanded tubular element in a borehole

In an expansion assembly (), an expandable bottom plug () is arranged below a primary expander () for expanding a tubular element (). The expandable bottom plug () includes an expandable tubular clad element with a sealing section for sealing the expanded clad element to a lower portion of the expanded tubular element (), and an anchoring section for anchoring the expanded clad element to the lower portion of the expanded tubular element. A secondary expander () is provided for radially expanding the clad element in the lower portion of the expanded tubular element by axial movement of the secondary expander through the clad element.

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Rijswijk, Netherlands

Walter Stam