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    • 68. 发明公开
    • A FLEXIBLE, TUBULAR DEVICE E.G. A BELLOWS
    • 柔性管状装置,例如在波纹管
    • EP1563216A2
    • 2005-08-17
    • EP03799466.2
    • 2003-11-17
    • NORSK HYDRO ASA
    • PETERSEN, HenryOLSEN, Soren, B.NIELSEN, Karl, Brian
    • F16L11/15
    • F16L27/11F16L11/15
    • The present invention concerns a flexible, tubular device e.g. a bellows with an internal diameter up to 60 millimeters, said device comprising one or more corrugated convolutions (2), said convolutions having an overall bell-like shape with rounded top portions (T) and rounded bottom portions (B,B'). The novel aspects involve that the curvature of the outside surface of the convolutions (2) is numerically smaller at the top portions (T) than at the bottom portions (B,B'), said curvature being derived from a curve (6) defined as the intersection of the outside surface (4) of the device and a plane through the longitudinal axis (8) of the device, as well as they involve that the curvature of said curve changes sign only once at a change position (P,P') located between a top portion (T) and an adjacent bottom portion (B,B'), and that the length of a first section (7) on the curve (6) is at least 10% longer than the length of a second section (9) on the curve, said first section (7) extending from one change position (P) to an adjacent change position (P) via a top portion (T), and said second section (9) extending from one change position (P) to an adjacent change position (P') via a bottom portion (B,B'). This provides an improved design with increased durability due to increased flexibility at lower stresses, compared to the prior art.
    • 69. 发明公开
    • High temperature flexible pipe joint
    • Biegsame Rohrverbindungfürhohe温度
    • EP1559940A1
    • 2005-08-03
    • EP05250427.1
    • 2005-01-27
    • Oil States Industries, Inc.
    • Moses, Charles J.Hogan, Michael EugeneMoses, Philip S.Pottorff, Todd M.Spicer, Carl C.
    • F16L27/103F16L27/11
    • E21B17/085F16L27/103F16L27/11
    • For continuous high temperature operation over a service life in excess of twenty years, a flexible pipe joint (18) includes various features that tend to reduce the temperature of the load-bearing flex element (25) or reduce strain in the warmer elastomeric layers of the flex element (25). These features include a heat shield (33) of low heat conductivity material integrated into the inner profile of the pipe extension (23) and interposed between the central bore of the pipe joint (18) and the flex element (25), low heat conductivity metal alloy components between the hot production fluid and the flex element (25), high temperature resistant elastomer at least in the warmest inner elastomer layer of the flex element (25), and a flex element (25) constructed to shift strain from the warmer inner elastomer layers to the colder outer elastomer layers by providing greater shear area, different layer thickness, and /or higher elastic modulus elastomer for the warmer inner elastomer layers.
    • 对于超过二十年的使用寿命的连续高温操作,柔性管接头(18)包括倾向于降低承载挠曲元件(25)的温度或减少加温弹性体层中的应变的各种特征 柔性元件(25)。 这些特征包括集成在管延伸部(23)的内部轮廓中并且插入在管接头(18)的中心孔和柔性元件(25)之间的低导热性材料的隔热罩(33),低热导率 至少在柔性元件(25)的最内层的弹性体层中,热生产流体和柔性元件(25)之间的金属合金部件,耐高温弹性体,以及构造成从温暖器移动应变的挠曲元件(25) 通过为较暖的内部弹性体层提供更大的剪切面积,不同的层厚度和/或更高的弹性模量弹性体,使内部弹性体层到较冷的外部弹性体层。