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1. 发明公开

EP2886788A3 Riser fatigue monitoring 有权转让
标题翻译：提升疲劳监测
公开(公告)号：EP2886788A3
公开(公告)日：2015-11-04
申请号：EP14188554.1
申请日：2014-10-10
申请人： 2HOffshore, Inc. , BP Exploration and Production, Inc.
发明人： Li, Songcheng , Campbell, Michael , Ge, Michael Long
IPC分类号： E21B17/01
CPC分类号： E02B17/0017 , E02B17/0034 , E02B2017/0095 , E21B17/01 , E21B47/0001 , G06F17/5009
摘要： A system and method is provided for determining curvature for subsea riser system, including but not limited to drilling risers, steel catenary risers, lazy-wave catenary risers and riser jumpers, comprising the steps of: periodically measuring acceleration in a first lateral direction at said vertical position to obtain a first acceleration timetrace processing said first acceleration timetrace to obtain a first acceleration spectra; applying a transfer function to said first acceleration spectra to obtain a first curvature spectra; and processing said first curvature spectra to obtain a first curvature timetrace. Preferably the transfer function is determined by a method comprising the step of modelling the riser as a Tensioned Timoshenko Beam.
The curvature may be used to determine stress and fatigue damage in a structure from motions measured at a single location or a combination of motions measured at a single location with or without tension measurement. The method can be used to determine curvature and hence stress and fatigue damage from any source of excitation, for example the excitation at the tension ring by the top tensioner system, and the vortex induced vibration locked in at any water depth.

2. 发明授权

EP2886788B1 Riser fatigue monitoring 有权转让
公开(公告)号：EP2886788B1
公开(公告)日：2017-09-13
申请号：EP14188554.1
申请日：2014-10-10
申请人： 2HOffshore, Inc. , BP Exploration and Production, Inc.
发明人： Li, Songcheng , Campbell, Michael , Ge, Michael Long
IPC分类号： E21B17/01 , E21B47/00
CPC分类号： E02B17/0017 , E02B17/0034 , E02B2017/0095 , E21B17/01 , E21B47/0001 , G06F17/5009

3. 发明公开

EP2886788A2 Riser fatigue monitoring 有权转让
标题翻译：立管疲劳监测
公开(公告)号：EP2886788A2
公开(公告)日：2015-06-24
申请号：EP14188554.1
申请日：2014-10-10
申请人： 2HOffshore, Inc.
发明人： Li, Songcheng , Campbell, Michael , Ge, Michael Long
IPC分类号： E21B17/01
CPC分类号： E02B17/0017 , E02B17/0034 , E02B2017/0095 , E21B17/01 , E21B47/0001 , G06F17/5009
摘要： A system and method is provided for determining curvature for subsea riser system, including but not limited to drilling risers, steel catenary risers, lazy-wave catenary risers and riser jumpers, comprising the steps of: periodically measuring acceleration in a first lateral direction at said vertical position to obtain a first acceleration timetrace processing said first acceleration timetrace to obtain a first acceleration spectra; applying a transfer function to said first acceleration spectra to obtain a first curvature spectra; and processing said first curvature spectra to obtain a first curvature timetrace. Preferably the transfer function is determined by a method comprising the step of modelling the riser as a Tensioned Timoshenko Beam.
The curvature may be used to determine stress and fatigue damage in a structure from motions measured at a single location or a combination of motions measured at a single location with or without tension measurement. The method can be used to determine curvature and hence stress and fatigue damage from any source of excitation, for example the excitation at the tension ring by the top tensioner system, and the vortex induced vibration locked in at any water depth.
摘要翻译：提供了一种用于确定海底立管系统的曲率的系统和方法，所述系统和方法包括但不限于钻井立管，钢悬链立管，惰波悬链立管和立管跳线，所述方法包括以下步骤：周期性地测量所述第一横向方向上的加速度垂直位置以获得处理所述第一加速时间轨迹的第一加速时间轨迹以获得第一加速度谱; 将传递函数应用于所述第一加速度谱以获得第一曲率谱; 并处理所述第一曲率谱以获得第一曲率时间曲线。优选地，传递函数由包括将立管建模为张紧Timoshenko梁的步骤的方法确定。曲率可以用来确定结构中的应力和疲劳损伤，所述结构来自在单个位置处测量的运动或者在单个位置处测量的运动的组合，在有或没有张力测量的情况下。该方法可用于确定曲率，从而确定来自任何激励源的应力和疲劳损伤，例如顶部张紧系统在张紧环处的激励以及锁定在任何水深处的涡流引起的振动。

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