管道不停输开孔作业中鞍形板探测打捞技术  

Detection/salvage technique for saddle-shaped plate during stoppling operation of pipeline

作　　者：王国超[1] 刘金宝[1] 刘格非[1] 王鑫[1] 夏国发[1] 

机构地区：[1]中国石油天然气管道局维抢修分公司,河北廊坊065000

出　　处：《油气储运》2011年第11期873-875,8,共3页Oil & Gas Storage and Transportation

摘　　要：针对管道不停输带压开孔时,鞍形板变形或设备操作失误可能导致鞍形板坠落管道的问题,进行了鞍形板探测打捞技术研究。准确探测鞍形板的位置是实现成功打捞鞍形板的关键环节,研究确定将打捞分成"探测"和"打捞"两步进行。经方案比选,确定采用"可视探测+磁铁吸附法"打捞方案。设计的管道高压可视化探测装置,可准确地确定鞍形板偏移的距离和方位。由磁铁和能灵活调节磁铁空间位置的连杆机构组成的打捞装置,可顺利地打捞出鞍形板。经大量试验验证,该技术适用于打捞管道内鞍形板偏移距离不超过其直径1/3的鞍形板,其成功应用于西气东输定远压气站探测打捞工程,避免了管道放空打捞鞍形板造成的巨大经济损失。The deformation of saddle-shaped plate or equipment fault will result in the submerging of saddle-shaped plate in pipeline in stoppling operation of pipeline.Therefore,a technical research on the detection/salvage method for the saddle-shaped plate was carried out.The salvage plan was composed of two steps in detection and salvage by means of detecting the locating the plate precisely.By comparison,the 'visible detection+magnetizing' method was finalized.The high-pressure visible detection apparatus designed could accurately locate the distance and position of the plate shifted.The magnetic block was flexible enough to drag the plate out of the pipe.By a wide experimental study,the technique was appropriate for getting the plate with shifting length less than 1/3 pipe diameter.The technique was successfully applied in Dingyuan Gas Compressor Station,West-to-East Natural Gas Transmission Pipeline,saving the costs in pipe blowing-down for the salvage of saddle-shaped plate.

关 键 词：管道 不停输开孔 鞍形板 可视探测 打捞技术 

分 类 号：TE832[石油与天然气工程—油气储运工程]