一种油气井用双向传爆管极限传爆距离

为评估油气井用双向传爆管在空气中的极限传爆距离(即在置信水平0.95下,可靠度为0.999的最大传爆距离),采用火工品常用的感度试验用数理统计方法——升降法,对双向传爆管进行传爆实验。用LS-DYNA软件进行了双向传爆管的传爆机理和爆炸过程的数值模拟。结果表明,在空气中,在0.95置信水平下,可靠度为0.999的双向传爆管的最大传爆距离为82.8 mm。数值模拟结果在一定程度上支持82.8 mm左右的实验结果。

Limit Transmitting Detonation Distance of Bi-directional Booster Used in Oil and Gas Wells

To evaluate the limit transmitting detonation distance (i.e. maximum transmitting detonation distance at a confidence level of 0.95 and reliability of 0.999) in the air of bi-directional booster used in oil and gas wells, a transmitting detonation test of bi-directional booster was performed by the mathematical statistic method- up-and-down method commonly adopted in sensitivity test of pyrotechnics. The numerical simulation of transmitting detonation mechanism and explosion process for bi-directional booster was carried out by LS-DYNA software. Results show that the maximum transmitting detonation distance with reliability of 0.999 under a confidence level of 0.95 in the air of bi-directional booster is 82.8 mm. The numerical simulation results support the experimental one of about 82.8 mm in a certain extent.