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US 2007/0163786 A1Published application
Expansion pig
AssigneeHydril Company
InventorRobert Sivley
Life of this patent
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Abstract
A tool for radially expanding casing having a tool body that includes a proximal end, a distal end, and an outer surface. The tool includes at least one hydraulic channel disposed axially. The at least one hydraulic channel transmits hydraulic pressure from behind the expansion tool forward in the direction of travel of the expansion tool.
Claims10
1-36. (canceled)
An expansion tool, comprising:
- a tool body comprising a proximal end, a distal end, an outer surface, wherein the tool body is configured to be engaged into and displaced through a tubular to be expanded along a direction of travel;
- at least one hydraulic channel extending through the tool body from the distal end;
- a sealing body adapted to isolate a fluid volume behind the sealing body from a fluid volume in front of the sealing body;
- and
- a plurality of contact rings between the tubular to be expanded and the outer surface.
2 more elements
Dependencies are inferred from the claim text.