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首页> 外文会议>Advances and experiences with pipelines and trenchless technology for water, sewer, gas, and oil applications >Application of Non-stop Plugging Technique with Expansive Cylinder in theAlteration of Inshore Oil and Gas Pipelines
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Application of Non-stop Plugging Technique with Expansive Cylinder in theAlteration of Inshore Oil and Gas Pipelines

机译：膨胀缸不间断封堵技术在近海油气管道改造中的应用

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摘要

There are two oil and gas pipelines in ZGBX offshore oilfield. One is oil and waterrncombined pipeline with a DN200 flow line inside a DN350 insulating layer. Thernother is a gas transmission pipeline with a DN300, which is coated with concrete.rnWith the planning and construction of the development projects of the coastalrnindustrial district in this oilfield, the sea area where the pipelines pass through andrnthe water depth is less than 6m would be occupied, which makes the safe running ofrnthe pipelines face a great challenge. This requires that the route of the pipelines mustrnbe altered. Based on the comparison and analysis between the non-stop pluggingrntechnique with disc and expansive cylinder, the latter was chosen after arncomprehensive consideration of various factors. And then an non-stop pluggingrnscheme of the oil and gas pipelines located at two points which are 6.8km apart at thernsame time was proposed, which includes the following major procedures such asrnconstruction preparation, welding under pressure, opening hole on pipe, cuttingrnbleeding balance hole, pipeline plugging, connecting the pipe heads, removing thernplugging and so on. The results show that the alteration scheme of the oil and gasrnpipelines with non-stop plugging technique in ZGBX offshore oil field is correct andrnreasonable, and the plugging technique with expansive cylinder is safe and reliable.rnThe experience and method of this alteration project can be referred by other similarrnpipelines.
机译：ZGBX近海油田有两条油气管道。一种是油水混合管道，在DN350绝缘层内有DN200流线。另一个是带有DN300且涂有混凝土的输气管道。随着该油田沿海工业区的开发项目的规划和建设，管道穿过的海域和水深小于6m的区域将成为可能。因此，管道的安全运行面临着巨大的挑战。这就要求必须改变管道的路线。在对盘式不间断堵漏技术和膨胀缸进行比较分析的基础上，综合考虑各种因素，选择了后者。提出了在同一时间相距6.8km的两点处油气管道的不间断堵漏方案，包括施工准备，加压焊接，管道上开孔，切孔放气平衡孔等主要程序。 ，管道堵塞，连接管头，消除堵塞等。结果表明，ZGBX海上油田采用不间断封堵技术进行油气管道改造方案是正确合理的，采用膨胀缸进行封堵技术是安全可靠的。本改造项目的经验和方法可以借鉴。通过其他类似的管道。

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