张逸群, 于超, 程光明, 宋先知, 赵克贤. 聚能筑巢堵漏用金属割缝管爆炸成形数值模拟及试验研究[J]. 石油钻探技术, 2020, 48(6): 54-60. DOI: 10.11911/syztjs.2020107
引用本文: 张逸群, 于超, 程光明, 宋先知, 赵克贤. 聚能筑巢堵漏用金属割缝管爆炸成形数值模拟及试验研究[J]. 石油钻探技术, 2020, 48(6): 54-60. DOI: 10.11911/syztjs.2020107
ZHANG Yiqun, YU Chao, CHENG Guangming, SONG Xianzhi, ZHAO Kexian. Experimental and Numerical Study of the Explosive Forming of Slotted Metal Pipes for Energy-Gathered Nesting Plugging[J]. Petroleum Drilling Techniques, 2020, 48(6): 54-60. DOI: 10.11911/syztjs.2020107
Citation: ZHANG Yiqun, YU Chao, CHENG Guangming, SONG Xianzhi, ZHAO Kexian. Experimental and Numerical Study of the Explosive Forming of Slotted Metal Pipes for Energy-Gathered Nesting Plugging[J]. Petroleum Drilling Techniques, 2020, 48(6): 54-60. DOI: 10.11911/syztjs.2020107

聚能筑巢堵漏用金属割缝管爆炸成形数值模拟及试验研究

Experimental and Numerical Study of the Explosive Forming of Slotted Metal Pipes for Energy-Gathered Nesting Plugging

  • 摘要: 对于油气和地热钻井完井过程中发生的溶洞型漏失,目前仍然缺乏有效的解决办法。为此,提出了聚能筑巢堵漏技术,并开展了金属桥架管柱优选和爆炸成形性能试验研究。首先介绍了聚能筑巢堵漏技术及其原理;然后建立了金属割缝管爆炸成形数值模型,分析了不同材料、不同割缝形式金属割缝管爆炸后的形态;最后设计了地面试验装置,确定了试验方法,并根据模拟结果,分别在空气、淹没、淹没围压环境中进行了地面试验。数值模拟得出,交错垂直开槽的5系铝合金割缝管在爆炸后变形适宜且不会失效,可以用作筑巢桥架材料;设计的试验装置可以较为真实地模拟井下工况,为进一步研究不同结构筑巢工具的炸药用量提供了条件。研究结果表明,聚能筑巢堵漏技术有望较好地解决堵漏材料难以留存、不易形成人工井壁的技术问题,进而提高溶洞型漏失的堵漏成功率、降低钻井完井成本。

     

    Abstract: At present, there is still no effective solution to the cavity-type lost circulation in the drilling and completion of oil, gas and geothermal resources. In the light of this, a energy-gathered nesting plugging technique was proposed, and experiments for explosive forming and the optimization of metal bridge strings were also conducted. The technique and its theory were first introduced, a numerical model for the explosive forming of slotted metal pipes was then established, the shapes of metal pipes slotted in different types and in different materials were analyzed. Finally, ground experimental device was designed, the experimental methods were determined, and according to the simulation results, ground experiments were conducted in air, submerged water, and submerged confining environments respectively. The numerical results show that the series 5 aluminum alloy pipe with straight slotting patterns, exhibits a suitable tensile deformation without failure after explosion, and can be utilized as the material for nesting bridge. The experimental device can effectively simulate the real downhole environment, providing conditions for further study on the the amount of explosives of different nesting tools. The research results show that the energy-gathered nesting plugging technology could be expected to better solve the technical problems that the plugging materials are difficult to retain and not easy to form the artificial well wall. By using it, the success rate of plugging of cavity-type lost circulation could be improved and the cost of drilling and completion could be reduced.

     

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