水平孔某型喷反装置的结构优化实验
Structure optimization of a jet-type reverse circulation tool for horizontal hole
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摘要: 通过类比相关喷反机具设计,设计并制造了某型喷反装置模型。之后进行了结构优化实验研究,得到了一系列适于现场工况的喷反装置关键器件优化组合,并认识到该类喷反装置中,喉管喷嘴组合模式对吸水效率的影响最大,而流量参数m、间距S对吸水效率的影响较小;喷嘴喷速大于40 m/s时,其吸水效率急剧下降。Abstract: On the analogy of relevant design,a preliminary design and experimental prototype of jet-type reverse circulation tool was completed,which could be used for horizontal hole.Based on structural optimization experi-ments and researches,a series of optimized combinations of key components were derived,which were appropriate to in-situ conditions.According to experiment results,some conclusions were drawn as follows:the water absorp-tion rate was most influenced by the mode composed of jet tube and jet nozzle and little influenced by flow pa-rameter m and span S;and when the jetting rate exceeded 40m/s,the water absorption rate decreased sharply.