Seamless expandable oil country tubular goods and manufacturing method thereof
US8512487B2 · kind B2 · utility
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6Claims
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Key dates
| Filing date | Oct 18, 2004 |
| Grant date | Aug 20, 2013 |
| Priority date | — |
| Expiry date | Jan 13, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A seamless expandable oil country tubular article, which has a superior pipe expansion property in a expanding process at an expand ratio of more than about 30% although having a high strength such as a tensile strength (TS) of about 600 MPa or more, and a manufacturing method thereof, the seamless expandable oil country tubular goods being in an as-rolled state or being processed, optionally necessary, by inexpensive nonthermal-refining type heat treatment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.