目前从各类冲击器的现场应用看，冲击器长度普遍约为1 m，在与钻头连接使用时因增加了稳定器与钻头之间的距离，造成钻具的预期斜率和钻头侧向力降低，进而影响井下造斜效果，而内置钻头多维冲击器可以有效解决这一问题。为了使内置钻头多维冲击器的性能能够实现最大化，降低压耗，采用PB（Plackett-Burman）筛选试验设计对冲击器内部参数进行了筛选试验，得到各参数对工具性能影响由大到小排列为：射流道宽度>入口面积>出口面积>振荡腔长度>双反馈流道宽度>附壁面曲率半径>劈间角，再利用BBD（Box-Behnken design）响应面法对排名前三的显著影响参数进行深入分析，得到内置钻头多维冲击器内部结构优化组合为入口面积为1 203.416 mm²、射流道宽度为14 mm，出口面积为455 mm²，最后通过Fluent软件仿真验证了优化方法的有效性，满足设计要求。

The length of the impactor is generally about one meter according to the current application of all kinds of impactors. As the existing impactor increases the distance between the stabilizer and the drill bit, it will cause the theoretical build slope and the lateral force of the drill bit to decrease when it is used in connection with the drill bit. This will in turn affects the drilling deviation section. In this regard, the multi-dimensional impactor with built-in drill bit can effectively solve this problem. Firstly, in order to maximize the performance of the multi-dimensional impactor with built-in drill bit and reduce the pressure loss, the PB (Plackett-Burman) screening test design was adopted to conduct screening tests on the internal parameters of the impactor. The effect of each parameter on the tool performance was as follows: Jet channel width > inlet area > Outlet area > length of oscillating cavity > width of double feedback channel > curvature radius of wall attached surface > wedge Angle. Then, BBD (Box-Behnken design) response surface method was used to provide an in-depth analysis of the top three significant impact parameters. The optimized combination of the internal structure of the multi-dimensional impacter with built-in drill bit was obtained as follows: the inlet area is 1 203.416 mm², the jet channel width is 14 mm, and the outlet area is 455 mm². Finally, the effectiveness of the optimization method was verified by the simulation of Fluent software, which met the design requirements.