考虑炸高和相位角影响的射孔枪卡枪及强度流固耦合分析

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摘要射孔作业过程中常发生射孔枪卡枪、损坏等安全事故，影响勘探开发进程。本文首先建立射孔弹-射孔枪-射孔液-套管-砂岩三维有限元模型，结合ALE算法，实现射孔液-射流-枪-套管-砂岩之间的流固耦合，分析不同炸高和相位角对射流侵彻过程中射孔枪毛刺和应力强度的影响。研究表明，单枚弹、炸高12mm时，毛刺4.1mm，最大应力1075MPa，孔道周围超过材料屈服极限的应力区域直径达到61mm；炸高18mm时，毛刺3.9mm，最大应力997MPa，超过材料屈服极限的应力区域直径达到45mm；炸高24mm时，毛刺3.6mm，最大应力912MPa，超过材料屈服极限的应力区域直径达到38mm；炸高增加，毛刺高度和最大应力以及对射孔枪材料的损伤区域范围均减小；炸高12mm，相位角30°、60°、90°时，毛刺高度较单枚时变化很小，超过材料屈服极限的应力区域直径分别为55mm、42mm、66mm，此区域内，在高爆轰压力下，射孔枪将发生向外鼓胀，即所谓的“胀枪”，引起卡枪事故，所以相位角60°时射孔枪的强度安全性更好。通过本文研究，解决了聚能爆轰仿真时常发生的分析意外终止和速度超限溢出问题，可为射孔爆轰侵彻类问题研究提供思路。

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关键词 ：射孔枪, 卡枪, 炸高, 相位角, 流固耦合

Abstract：Safety accidents such as chucking and damage of perforating guns often occur during perforation operations, which affect the exploration and development process. This paper uses LS-DYNA software to establish a three-dimensional finite element model of perforating bullet-perforating gun-perforating fluid-casing-sandstone, combined with the ALE algorithm, realize the fluid-solid coupling between perforating fluid-jet-gun-casing-sandstone, Analyze the effects of different blast heights and phase angles on the burrs and stress intensity of the perforating gun during the jet penetration process. Studies have shown that when a single bullet and a blast height of 12mm, the burr is 4.1mm, the maximum stress is 1075MPa, and the diameter of the stress area that exceeds the yield limit of the material around the hole reaches 61mm. When the blast height is 18mm, the burr is 3.9mm, the maximum stress is 997MPa, and the diameter of the stress area exceeding the yield limit of the material reaches 45mm; When the blast height is 24mm, the burr is 3.6mm, the maximum stress is 912MPa, and the diameter of the stress area exceeding the yield limit of the material reaches 38mm; The blast height is increased, the burr height and the maximum stress, and the damage area of the perforating gun material are reduced. When the blast height is 12mm and the phase angle is 30°, 60°, and 90°, the height of the burr changes little compared with that of a single piece. The diameter of the stress area exceeding the yield limit of the material is 55mm, 42mm, 66mm. In this area, under high detonation pressure, the perforating gun will bulge outwards, which is the so-called "bulging gun", causing a jamming accident. Therefore, the strength and safety of the perforating gun is better when the phase angle is 60°. Through the research in this paper, the problems of accidental analysis termination and velocity overrun that often occur in the simulation of shaped energy detonation are solved, which can provide ideas for the research of perforation detonation penetration problems.

Key words： perforating gun stuck gun blast high phase angle fluid-solid coupling

收稿日期: 2020-11-26 出版日期: 2022-05-15

引用本文:

窦益华1，朱晓栋1，范永均1,2，李明飞1. 考虑炸高和相位角影响的射孔枪卡枪及强度流固耦合分析[J]. 振动与冲击, 2022, 41(9): 167-173.
DOU Yihua, ZHU Xiaodong, FAN Yongjun, LI Mingfei. Fluid-solid interaction analysis for perforation gun jamming and strength considering. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(9): 167-173.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2022/V41/I9/167

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