Mid-seal for expandable connections
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United States of America Patent
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May 15, 2012
Grant Date -
Feb 1, 2007
app pub date -
Jul 28, 2005
filing date -
Jul 28, 2005
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An expandable tubular connection includes a pin member and a box member. The pin member includes a pin thread formed on a small step and a large step and a first seal surface formed between the small step and the large step. The box member includes a box thread formed on a small step and a large step and a second seal surface formed between the small step and the large step. The pin thread and the box thread are wedge threads. Upon a selected make-up of the pin member with the box member a selected gap exists between the first seal surface and the second seal surface. The gap is selected such that, when plastically radially expanded by a selected amount, a seal is formed between at least a portion of the first seal surface and the second seal surface.
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