System And Method For Heat Treating A Tubular
First Claim
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1. A system for heat treating a tubular, comprising:
- a first coil configured to circumferentially surround the tubular and induce, from without the tubular, current flow in a cylindrical portion of the tubular adjacent the first coil;
a second coil configured to be inserted into a bore of the tubular and induce, from within the tubular, in conjunction with the first coil, current flow in the cylindrical portion of the tubular.
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Abstract
A system and method for heat treating a tubular. In one embodiment, a system for heat treating a tubular includes a first coil and a second coil. The first coil is configured to circumferentially surround the tubular and induce, from without the tubular, current flow in a cylindrical portion of the tubular adjacent the first coil. The second coil is configured to be inserted into a bore of the tubular and induce, from within the tubular, in conjunction with the first coil, current flow in the cylindrical portion of the tubular.
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Citations
23 Claims
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1. A system for heat treating a tubular, comprising:
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a first coil configured to circumferentially surround the tubular and induce, from without the tubular, current flow in a cylindrical portion of the tubular adjacent the first coil; a second coil configured to be inserted into a bore of the tubular and induce, from within the tubular, in conjunction with the first coil, current flow in the cylindrical portion of the tubular. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for heat treating a tubular, comprising:
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positioning a first coil to encircle a portion of a tubular to be heat treated; positioning a second coil within a bore of the tubular at a location of the portion of the tubular to be heat treated; and heat treating the portion of the tubular by inducing current flow about an exterior cylindrical wall and an interior cylindrical wall of the portion of the tubular via the first coil and the second coil. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. Inductive heat treatment apparatus, comprising:
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an exterior induction coil configured to surround an outside diameter of a tubular; an interior induction coil configured to occupy a bore of the tubular; and one or more controllers coupled to the exterior induction coil and the interior induction coil; and
configured to simultaneously energize the exterior induction coil and the interior induction coil to concurrently heat treat a selected cylindrical portion of the tubular from exterior and interior of the tubular. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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Specification