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《Equipment for Geophysical Prospecting》 2018-04
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The design and flow performance analysis of duckbill type rubber check valve

Chen Xianzhan;Ma Yu;Wang Yongfang;  
In order to effectively prevent debris and other solid substances from entering the cavity of the down-hole hammer,to reduce the failure rate of down-hole hammer and improve the drilling efficiency,we designed a drill with a reverse sealing device.We add a duckbill type rubber check valve in the exhaust passage of the drill bit.In this paper,ANSYS Mechanical software was used to analyze the flow performance of the duckbill type rubber check valve with the finite element method.The structure strength and circulation area of two different structures of t duckbill type rubber check valve are analyzed under the conditions of forward ventilation and reverse water pressure.The results show that the circulation area and reverse sealing performance and stress of the two different structures have reached the designed requirements.
【CateGory Index】: TE92
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