水下井口控油装置稳定性分析
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摘要
为了保证水下井口救援控油装置在海底转接作业过程中不发生失稳现象,需确定合理的控油装置入泥深度。鉴于此,根据水下井口控油装置结构的受力特点,构建了水下井口控油装置受力的力学模型。根据控油装置所受的海流力、土压力、侧壁摩擦力、土切力和基底反力计算得出控油装置的安全入泥深度要大于2.24 m;根据构建的控油装置力学模型对其地基稳定性、抗滑移和抗倾覆进行了计算分析。计算结果表明,控油装置结构底部抗滑移安全系数为2.78,可抗海流速度极限为3.17 m/s。研究结果可为实际工程作业提供理论支持。
To ensure the subsea wellhead rescue oil control device do not experience instability during switching operation,a reasonable in-mud depth of the oil control device need to be determined. In view of this,the mechanical model of the subsea wellhead oil control device has been established according to the mechanical characteristics of the subsea wellhead oil control device structure. Based on the current force,soil pressure,sidewall friction,soil shear and basal counterforce on the oil control device,the calculation result suggested that the safety inmud depth should be greater than 2. 24 m. Finally,the foundation stability,anti-sliding and anti-overturning of the oil control device have been calculated according to the established mechanical model. The calculation results show that the bottom of the oil control device structure has an anti-sliding safety factor of 2. 78 and an anti-current speed limit of 3. 17 m / s. The study results could provide theoretical support for the actual project operation.
To ensure the subsea wellhead rescue oil control device do not experience instability during switching operation,a reasonable in-mud depth of the oil control device need to be determined. In view of this,the mechanical model of the subsea wellhead oil control device has been established according to the mechanical characteristics of the subsea wellhead oil control device structure. Based on the current force,soil pressure,sidewall friction,soil shear and basal counterforce on the oil control device,the calculation result suggested that the safety inmud depth should be greater than 2. 24 m. Finally,the foundation stability,anti-sliding and anti-overturning of the oil control device have been calculated according to the established mechanical model. The calculation results show that the bottom of the oil control device structure has an anti-sliding safety factor of 2. 78 and an anti-current speed limit of 3. 17 m / s. The study results could provide theoretical support for the actual project operation.
引文
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