射孔弹碎屑控制技术研究
基金项目:
11条重点产业链项目（2023SLZDCY-130）。
Study on Debris Control Technology of the Shaped Charge
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摘要:为了提高油气井射孔孔道清洁度，降低后续井下作业中与碎屑有关的风险，以海油常用的114型射孔弹作为研究对象，采用热塑性高分子复合材料作为卡套，装配在射孔弹金属弹壳外部，设计了2种壳体结构的114型高孔密低碎屑射孔弹，对其模拟装枪穿目标靶性能和碎屑收集能力进行了仿真和试验研究。结果表明：相较于结构2壳体，结构1壳体在爆轰波作用下更易形成连续的大尺寸碎块。采用改性热塑性高分子复合材料制作的卡套在射孔时易形成粘性非牛顿流体，与壳体碎屑充分融合粘结成块。114型低碎屑射孔弹穿钢靶穿深为199.6 mm，相较于常规深穿透射孔弹提高了10.9%；掉落碎屑质量为105 g，碎屑率为0.19%。
Abstract:In order to improve the cleanliness of oil and gas well perforation holes and reduce the risk related to debris in subsequent downhole operations, the commonly used 114 type shaped charge of CNOOC was taken as the research object, and a thermoplastic polymer composite material was used as the sleeve, which was assembled outside the metal shell of the shaped charge. Two types of the 114 type high porosity low debris shaped charge with different shell structures were designed, and their target penetration performance and debris collection ability were simulated and tested. The results show that compared to structure 2 shell, structure 1 shell is more prone to form continuous large-sized fragments under the action of detonation waves. The sleeve made of modified thermoplastic polymer composite material is prone to form viscous non Newtonian fluid during perforation, which fully fuses and bonds with the shell debris into blocks. The penetration depth of the 114 type low debris shaped charge through steel targets is 199.6 mm, which is 10.9% higher than that of conventional deep penetration shaped charges; The mass of fallen debris is 105 g, and the debris rate is 0.19%.
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