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公开(公告)号：US06315497B1
公开(公告)日：2001-11-13
申请号：US08997632
申请日：1997-12-23
IPC分类号： E03B710
CPC分类号： H05B3/42 , E21B17/015 , F16L1/00 , F16L53/37 , H05B3/06
摘要： A heated flowline electrical isolation joint is disclosed for introducing current into a pipe-in-pipe system having an outer and an inner pipe. A hub presents a load flange having tension and compression load shoulders on its terminal end and connects to the inner pipe on its other end. An end flange presents an end flange load shoulder on one end and a high strength, highly electrically insulative first ring separates the compression load shoulder from the end flange load shoulder which engage therethrough in a load bearing relationship. A plurality of o-ring seals secure the compression load shoulder-to-first ring-to-end flange load shoulder interfaces. A retainer flange connects to the end flange on one end and to the outer piper on the other end, encircling the hub and presenting a retainer flange load shoulder. A second high strength, highly electrically insulative ring separates the tension load shoulder of the hub from the retainer flange load shoulder which engage therethrough in a load bearing relationship. A plurality of o-ring seals securing the tension load shoulder-to-second ring-to-retainer flange load shoulder interfaces. An electrical feedthrough tubes receives an electrical penetrator which reaches through the retainer flange to electrical connection with the hub. An electrically insulative material in the annulus between the hub and the retainer flange and between the electrical penetrator and the electrical feedthrough tube secures electrical isolation across non-load bearing areas.
摘要翻译： 公开了一种用于将电流引入具有外管和内管的管内系统中的加热流线电隔离接头。 轮毂具有在其末端具有张力和压缩载荷肩部的负载凸缘，并在其另一端连接到内管。 端部凸缘在一端具有端部凸缘承载台肩，并且高强度，高电绝缘的第一环将压缩载荷肩部与承载关系中与其穿过的端部凸缘承载台肩分开。 多个O形圈密封件固定压缩载荷肩部到第一端对边缘法兰负载肩部接口。 保持器法兰在一端连接到端部凸缘，并在另一端连接到外部夹子，环绕毂并呈现保持器凸缘加载肩部。 第二高强度，高电绝缘环将轮毂的张力负载肩部与承载凸缘承载肩部分离，承载凸肩在承载关系中与其啮合。 多个O形圈密封件，用于固定张力负载肩至肩环对保持器法兰负载肩部接口。 电馈通管接收穿过保持器凸缘的电穿透器，以与毂电连接。 在轮毂和保持器凸缘之间以及电穿透器和电馈通管之间的环形空间中的电绝缘材料确保跨非承载区域的电隔离。
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公开(公告)号：US06171025B2
公开(公告)日：2001-01-09
申请号：US08625430
申请日：1996-03-26
IPC分类号： G01M308
CPC分类号： G01M3/283
摘要： A method is disclosed for pipeline leak detection in which a vacuum is maintained in the annulus of a pipe-in-pipe flowline with a vacuum pump having a discharge reservoir which is monitored for the appearance of water and hydrocarbon vapors. In another aspect of the invention pipeline leak detection is accomplished through maintaining a gas at a nominally constant pressure in an annulus of a pipe-in-pipe flowline and monitoring the annulus for pressure increase indicative of water or product intrusion into the annulus.
摘要翻译： 公开了一种用于管道泄漏检测的方法，其中在具有排放储存器的真空泵中在管道管道流线管的环空中保持真空，该排放储存器被监测用于水和碳氢化合物蒸气的外观。 在本发明的另一方面，管道泄漏检测是通过将管道管道流管的环空中的气体保持在标称恒定的压力下进行的，并且监测环形空间以指示水或产品侵入环空中的压力增加。
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公开(公告)号：US06179523B2
公开(公告)日：2001-01-30
申请号：US08625425
申请日：1996-03-26
IPC分类号： F16L100
摘要： A method for installing an offshore pipeline is disclosed in which the inner and outer pipes are structurally connected at a terminal end of a pipe-in-pipe flowline and centralizers are placed in the annulus to provide lateral support and maintain concentricity between the two pipes and to prevent buckling of the inner pipe. The working end of the pipeline is suspended under construction in a substantially vertical position within slips at the weld floor of a J-lay installation barge and sections of inner and outer pipe are added. Inner pipe is added by sections by grasping and orienting the section of inner pipe to a vertical position and the section is brought into abutting position with the inner pipe at the working end of the pipeline under construction, welded in place, and the weld is coated with an arc resistant material. Sections of outer pipe are added by grasping and reorienting to a vertical orientation, sliding the section down over the section of inner pipe just welded in place, bringing the section of outer pipe into abutting position with the working end of the pipeline under construction and welding it into place. The working end of the pipeline is then advanced through the slips to bring the end of the section of outer pipe added adjacent the weld floor and the foregoing steps are repeated as necessary to add additional sections of inner and outer pipe to complete the pipeline.
摘要翻译： 公开了一种用于安装海上管道的方法，其中内管和外管在管管流线的终端处结构连接，并且将扶正器放置在环中以提供侧向支撑并保持两个管之间的同心度， 以防止内管的弯曲。 管道的工作端在J-lay安装驳船的焊接地板的底板内以基本上垂直的位置悬挂在内部和外管的部分。 通过将内管的截面抓住并定向到垂直位置，将内管加入内管，并将该部分与内管在与施工中的管道的工作端处连接在一起的位置，焊接到位，焊缝涂覆 具有抗电弧材料。 通过抓取和重新定向到垂直方向添加外管部分，将部分向下滑动正好焊接在内管的部分，使外管的部分与施工和焊接的管道工作端的邻接位置 它到位 管道的工作端然后通过滑块前进，使外管部分的末端添加在焊接地板附近，并且根据需要重复上述步骤以添加内管和外管的附加部分以完成管道。
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公开(公告)号：US06814146B2
公开(公告)日：2004-11-09
申请号：US09910696
申请日：2001-07-20
IPC分类号： E21B4301
CPC分类号： E21B36/003 , E21B36/04 , F16L53/37
摘要： Apparatus and method for electrically heating a segment of a subsea pipeline are provided. The annulus between the pipes electrically isolates the pipes, but at the ends of the segment the concentric pipes are electrically connected. The inner pipe may be thermally insulated. Electrically insulating water stops are provided to act as flood control barriers in the event the outer pipe is breached. Collars on seals around the water stops may help avoid electrical shorts and packets of super-absorbent may be in place to further reduce the risk of electrical faults.
摘要翻译： 提供了用于电加热海底管道段的设备和方法。 管道之间的环形物使管道电隔离，但是在段的端部，同心管电连接。 内管可以是绝热的。 在外管被破坏的情况下，提供电绝缘止水阀作为防洪屏障。 水封周围的密封圈可能有助于避免电气短路，并且可能会有一些超吸收剂，以进一步降低电气故障的风险。
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公开(公告)号：US6142707A
公开(公告)日：2000-11-07
申请号：US921737
申请日：1997-08-27
CPC分类号： F16L53/007 , E21B17/015 , H05B3/06 , H05B3/42
摘要： A system for direct electric heating of a subsea pipeline is disclosed in the form of a pipe-in-pipe flowline having an electrically conductive outer carrier pipe and an electrically conductive inner pipe or flowline arranged longitudinally, substantially concentrically within the outer pipe. An annulus is defined between the inner and outer pipes and a pipe insulating joint assembly structurally joins, but electrically insulates, the inner and outer pipes at a first end of the subsea pipeline. A power input provided on the surface facilities is electrically connected across the inner and outer pipes at the first end of the pipeline, and an electrical pathway completes the circuit by connecting the inner and outer pipes at the second end of the pipeline.
摘要翻译： 公开了一种管道内管道流线的形式，该系统具有导电外承载管和纵向排列的基本同心地位于外管内的导电内管或流管。 在内管和外管之间限定一个环，并且管道绝缘接头组件在海底管道的第一端处结构地连接，但是将内管和外管电绝缘。 设置在地面设施上的电力输入在管道的第一端处跨内管和外管电连接，电路通过在管道的第二端连接内管和外管来完成电路。
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