Radially expandable tubular connection
AssigneeHydril Company
InventorRobert S. Sivley, IV
Life of this patent
Estimating the term…
Abstract
A radially expandable tubular connection including a box member having an internal thread and a first seal surface and a pin member having an external thread and a second seal surface. The external thread threadedly engages the internal thread and the first and second seal surfaces form a metal-to-metal seal upon engagement of the seal surfaces. At least one groove is formed on an outer surface of the box member, and the at least one groove is shaped so that the box member radially deforms in a direction toward the pin member in a region near the metal-to-metal seal after radial plastic expansion of the pin and box members after engagement of the threads.
Claims37
A radially expandable tubular connection comprising:
- a box member comprising an internal thread and a first seal surface;
- a pin member comprising an external thread and a second seal surface, the external thread adapted to threadedly engage the internal thread and the first and second seal surfaces adapted to form a metal-to-metal seal upon engagement thereof;
- and
- at least one groove formed on an outer surface of the box member, the at least one groove shaped so that the box member radially deforms in a direction toward the pin member axially proximate the metal-to-metal seal upon radial plastic expansion of the pin and box members after engagement of the threads.
A radially expandable tubular connection comprising:
- a box member comprising an internal thread and a first seal surface;
- a pin member comprising an external thread and a second seal surface, the external thread adapted to threadedly engage the internal thread and the first and second seal surfaces adapted to form a metal-to-metal seal upon engagement thereof;
- and
- at least one groove formed on an outer surface of the box member axially proximate the first seal surface, the at least one groove shaped so that the box member radially deforms in a direction toward the pin member axially proximate the metal-to-metal seal upon radial plastic expansion of the pin and box members after engagement of the threads.
A radially expandable tubular connection comprising:
- a box member comprising an internal thread and a first seal surface;
- a pin member comprising an external thread and a second seal surface, the external thread adapted to threadedly engage the internal thread and the first and second seal surfaces adapted to form a metal-to-metal seal upon radial plastic expansion of the pin and box members after engagement of the threads;
- and
- at least one groove formed on an inner surface of the box member, the at least one groove adapted so that the box member radially deforms in a direction toward the pin member proximate the seal surfaces after the radial plastic expansion.
A radially expandable tubular connection comprising
- a box member comprising an internal threat and a first seal surface;
- a pin member comprising a external thread and a second seal surface, the external thread adapted to engage the internal thread and the first and second seal surfaces adapted to form a metal-to-metal seal;
- and
- at least one groove formed on a surface of the box member, the at least one groove shaped so that the box member radially deforms in a direction toward the pin member proximate the seal surfaces upon radial plastic expansion.
Dependencies are inferred from the claim text.