摘要
海底管缆存在悬空、裸露等隐患,对悬空、裸露管段进行底部抛砂掩埋是主要的治理方法。目前,抛砂掩埋时多采用人工抛砂或履带散砂抛投方式,存在抛砂位置不准确、抛砂轨迹不易控制等问题,因此需研制可实现定点抛砂且抛砂轨迹可控的高效率抛砂设备。为了提高抛填精度,研制了一种具有定位定向功能的新型抛砂回填装置。为了阐明新型抛砂回填装置的定位和轨迹控制原理,利用有限元分析方法计算了其关键零部件的强度,并通过陆上和海上定向抛投试验分析了该装置的抛砂效果和探究其抛填精度高的原因。结果表明,新型抛砂回填装置通过伸缩投放机构将砂袋抛投至海底管缆悬空区域,实现了抛填位置的精确定位,同时利用伸缩投放机构的框架式结构实现了抛砂轨迹可控;装置关键零部件强度可靠且抛砂效果符合管线防护要求,抛填精度可达±1.2 m,既提高了抛砂效率又降低了施工成本。新型抛砂回填装置能够解决目前海底管缆悬空治理所面临的难题且可保障施工安全,这为浅海油田悬空管缆治理提供了可靠的技术支持。
Sand burying at the bottom of a suspended exposed pipe section is the most important treatment method for the hidden dangers of the suspended and exposed submarine pipeline and cable.At present,the method of artificial sand throwing or caterpillar loose sand throwing is often used for sand burying,but there are problems such as inaccurate sand throwing position and difficult control of sand throwing trajectory.Therefore,it is necessary to develop an efficient sand throwing equipment that can realize fixed-point sand throwing and controllable throwing trajectory.In order to improve the accuracy of filling,a new sand throwing backfill device with positioning and orientation function was developed.In order to clarify the principle of positioning and trajectory control of the new sand throwing backfill device,the strength of its key components was calculated by using the finite element analysis method,and the sand throwing effect of the device was analyzed and the cause of its high filling precision was explored through the land and sea directional throwing tests.The results showed that the new sand throwing backfill device could accurately locate the sand throwing position to drop the sand bag to the suspended area of submarine pipeline and cable by the telescopic release mechanism,and realize the sand throwing trajectory controllable through the frame structure of the telescopic release mechanism.The strength of each key component of the device was reliable and the sand throwing effect met the requirements of pipeline protection,and the filling precision reached ±1.2 m,which not only improved the sand throwing efficiency,but also reduced the construction costs.The new sand throwing backfill device can solve the current difficulties in the suspension management of submarine pipeline and cable and ensure the construction safety,which provides reliable technical support for the management of suspended pipeline and cable in shallow sea oil fields.
作者
孙宁松
史永晋
SUN Ning-song;SHI Yong-jin(Engineering Constructions Department of Shengli Oilfield Branch,China Sinopec Group,Dongying 257000,China;Drilling Technology Research Institute,Sinopec Shengli Petroleum Engineering Corporation Limited,Dongying 257000,China)
出处
《工程设计学报》
CSCD
北大核心
2020年第5期654-661,共8页
Chinese Journal of Engineering Design
基金
国家重点研发计划资助项目(2016YFC0802300)。
关键词
抛填砂袋
抛砂回填装置
轨迹控制
强度
抛填精度
sand-filling bag
sand throwing backfill device
trajectory control
strength
filling precision
