Tubing component having a cladding of fillet weld, and method for producing a tubing component
AssigneeVallourec Tube-Alloy, LLC
InventorGabriel Roussie
Life of this patent
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Abstract
Disclosed is a tubing component for the oil and gas industry. The tubing component includes an outer tube and an inner tube within the outer tube, said tubes being so configured to create a space between each other over a specified length. Each end of the inner tube is secured to the internal surface of the outer tube by a frustoconical fillet weld so that said space is leak-tight. The inner tube has a first internal diameter ID along a first length starting from each end of said tube, and a second, smaller internal diameter ID′ along a second length beyond the first length. The tubing component further includes a protective metallic layer extending at least over the fillet weld. Also disclosed is a method for producing this tubing component.
Claims33
A tubing component, comprising an outer tube and an inner tube within the outer tube, said tubes being so configured to create a space between each other over a specified length, wherein
- a. each end of the inner tube is secured to the internal surface of the outer tube by a frustoconical fillet weld so that said space is leak-tight,
- b. the inner tube has
- i. a first internal diameter ID along a first length starting from each end of said tube,
- ii. a second, smaller internal diameter ID' along a second length beyond the first length,
- c. the tubing component further includes a protective metallic layer extending at least over the fillet weld.
A method for producing a tubing component comprising an outer tube and an inner tube within the external tube, said outer and inner tubes being so configured to create a space between each other over a specified length, the method comprising:
- a. providing, before assembly, an inner tube with:
- i. a first internal diameter ID along a first length starting from each end of said tube,
- ii. a second, smaller internal diameter ID′ along a second length beyond the first length,
- b. positioning the inner tube within the outer tube,
- c. welding each end of the inner tube to the internal surface of the outer tube so as to produce a frustoconical fillet weld that secures the tubes to each other so that said space is leak-tight,
- d. forming a protective metallic layer that extends at least over the weld.
Dependencies are inferred from the claim text.