连续循环配套钻井工具研究
发布时间：2018-11-22 12:43
【摘要】：连续循环钻井技术是为了实现钻进过程中不停泵接单根而研发的新工艺。该技术可有效减少因开泵、停泵造成的井下压力波动,降低由于井下压力波动造成的井下复杂情况及事故发生,特别有利于压力敏感井、大斜度井、大位移井、深水井、欠平衡井、窄密度窗口井的安全作业。本文研究了两种连续循环钻井技术及设备的工作原理,通过对国内钻井设备和阀门制造业的分析,研制了一种能够实现连续循环钻井的连续循环配套钻井工具。其核心是以球阀和侧阀组成的三通连续循环短节,以快速连接工具等过渡管汇及其他地面控制系统配套,制定合理的连续循环钻井工艺,达到快捷可靠的连续循环钻井作业,最终实现接/卸立柱时钻井液连续循环,保障井下泥浆当量循环密度的稳定,减少井下复杂情况和事故的发生。通过对连续循环配套钻井工具样机的室内外试验,经过多次改进和试验,完善了工具在强度、密封、功能等各方面的性能,最终在兴古7-H173井进行了现场试验,证明了本文研制的连续循环配套钻井工具及其工艺的有效性。与CCS连续循环系统在井口控制相比,本文研制的连续循环配套钻井工具具有结构简单、操作简便、流道可迅速转换、压力波动小,保持井下压力稳定等优势,为实现连续循环钻井作业提供了有力的工具支撑。
[Abstract]:Continuous circulation drilling technology is a new technology developed to realize continuous pump connection during drilling. The technology can effectively reduce the downhole pressure fluctuation caused by pump opening and pump shutdown, and reduce the downhole complex conditions and accidents caused by downhole pressure fluctuation, especially in favor of pressure sensitive wells, large inclination wells, large displacement wells and deep wells. Safe operation of underbalanced well and narrow density window well. In this paper, the working principle of two kinds of continuous circulation drilling technology and equipment is studied. Through the analysis of domestic drilling equipment and valve manufacturing industry, a kind of continuous circulation drilling tool is developed which can realize continuous circulation drilling. The core of the system is to establish a reasonable continuous circulation drilling technology with ball valve and side valve, a three-way continuous circulation short section, a quick connecting tool, and other ground control systems, so as to achieve fast and reliable continuous circulation drilling operation. Finally, the continuous circulation of drilling fluid is realized in connection / unloading of pillar, which ensures the stability of equivalent circulation density of downhole mud, and reduces the occurrence of complex conditions and accidents in downhole. Through the indoor and outdoor test of the prototype of the continuous circulation drilling tool, after many improvements and tests, the performance of the tool in strength, sealing and function has been improved. Finally, the field test has been carried out in Xinggu 7-H173 well. It is proved that the continuous circulation drilling tool and its technology are effective. Compared with the control of CCS continuous circulation system in wellhead, the drilling tool developed in this paper has the advantages of simple structure, simple operation, rapid flow channel conversion, low pressure fluctuation, and maintaining downhole pressure stability. It provides a powerful tool support for the continuous circulation drilling operation.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE92
，
本文编号：2349408
[Abstract]:Continuous circulation drilling technology is a new technology developed to realize continuous pump connection during drilling. The technology can effectively reduce the downhole pressure fluctuation caused by pump opening and pump shutdown, and reduce the downhole complex conditions and accidents caused by downhole pressure fluctuation, especially in favor of pressure sensitive wells, large inclination wells, large displacement wells and deep wells. Safe operation of underbalanced well and narrow density window well. In this paper, the working principle of two kinds of continuous circulation drilling technology and equipment is studied. Through the analysis of domestic drilling equipment and valve manufacturing industry, a kind of continuous circulation drilling tool is developed which can realize continuous circulation drilling. The core of the system is to establish a reasonable continuous circulation drilling technology with ball valve and side valve, a three-way continuous circulation short section, a quick connecting tool, and other ground control systems, so as to achieve fast and reliable continuous circulation drilling operation. Finally, the continuous circulation of drilling fluid is realized in connection / unloading of pillar, which ensures the stability of equivalent circulation density of downhole mud, and reduces the occurrence of complex conditions and accidents in downhole. Through the indoor and outdoor test of the prototype of the continuous circulation drilling tool, after many improvements and tests, the performance of the tool in strength, sealing and function has been improved. Finally, the field test has been carried out in Xinggu 7-H173 well. It is proved that the continuous circulation drilling tool and its technology are effective. Compared with the control of CCS continuous circulation system in wellhead, the drilling tool developed in this paper has the advantages of simple structure, simple operation, rapid flow channel conversion, low pressure fluctuation, and maintaining downhole pressure stability. It provides a powerful tool support for the continuous circulation drilling operation.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE92
，
本文编号：2349408
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