Numerical Optimization of Structural Parameters on GQ-108C Air Reverse Circulation DTH Hammer Bit
Numerical Optimization of Structural Parameters on GQ-108C Air Reverse Circulation DTH Hammer Bit
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DOI：
10.1007/978-3-642-53962-6_53
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发表时间：
2013-05
期刊：
影响因子：
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通讯作者：
Z. Zhao;Lijia Li;Xia Huan;Kun Bo
中科院分区：
文献类型：
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作者：
Z. Zhao;Lijia Li;Xia Huan;Kun Bo
为了解决潜孔锤反循环钻进中钻屑从钻杆与井壁之间的环形空间窜出的问题，利用喷射理论、正交试验设计和工程流体动力学（EFD）技术对反循环钻头的结构参数进行了优化，包括：扩散槽深度（H）、扩散槽扩散角（β）、内喷嘴直径（d）、内喷嘴倾角（θ）和内孔吸嘴数量（N）。研究表明，当用气量为12 m3/min时，H = 20 mm，β=10°，d= 7 mm，θ =25°，N=3是最佳配置。
In order to solve the problem that cuttings running out through the annular space between the drill pipe and borehole wall in Reverse Circulation drilling with Down-The-Hole (DTH) hammer, the ejector theory and orthogonal test design as well as Engineering Fluidic Dynamics ( EFD) technology were utilized to optimize the structural parameters of the reverse circulation drill bit, including: the diffuser slot depth(H), the diffusion angle (β)of diffuser slot, the diameter of inner injection nozzle (d) ,inclination angle of inner injection nozzle (θ) and the number of suction nozzles (N) of the internal orifice. Research has shown that theH=20mm,β=10°,d=7mm,Ɵ=25°,N=3 is the best configuration when air consumption is 12m3/min.