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- W2379310316 abstract "By self-designed jet rock breaking system,the experiments were conducted for multi-hole jet bit under submerged and confining pressure conditions. And the key factors were analyzed with rock breaking effect including erosion time,impact pressure,confining pressure,standoff distance,numbers of nozzle orifices and lateral orifice angle. The results show that with the increase of erosion time,the rock breaking effect increase first and then become constant;the rock breaking effect increase with the increase of jet pressure;with the increase of confining pressure,the rock breaking effect decrease;the rock breaking effect increase first and then decrease with the increase of standoff distance,there is a optimal standoff distance range;with the increase of numbers of nozzle orifices,the shape of the jet drilling hole become more round;with the increase of lateral orifice angle,the rock breaking effect increase first and then decrease,there is a optimal lateral orifice angle range. The results can offer helps for hydraulic parameters selection and structural parameter design of multi-hole jet bit." @default.
- W2379310316 created "2016-06-24" @default.
- W2379310316 creator A5022987423 @default.
- W2379310316 date "2015-01-01" @default.
- W2379310316 modified "2023-09-24" @default.
- W2379310316 title "Experimental Study on Rock Breaking and Drilling Laws by Multi-hole Jet Bit" @default.
- W2379310316 hasPublicationYear "2015" @default.
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