CAJ | 학술논문

针对常规自进式喷嘴在水射流径向钻井时可能出现破岩钻孔能力或自牵引驱动力不足的问题，设计了自动调节流量分配的喷嘴。该喷嘴由前向喷嘴、后向喷嘴、探头和节流调节盘组成，探头和调节盘可根据钻进是否遇阻自动调节前、后向流量分配，实现喷嘴在正常钻进和遇阻情况下牵引力和破岩钻孔能力转换。在对喷嘴进行参数设计和对节流调节盘做受力分析后，测试了喷嘴的前、后向流量分配及牵引力、节流盘启动特性和流量自动调节效果等。试验结果表明，在钻进遇阻时，喷嘴前向流量可增加6?7％以上，这说明其自动调节流量分配原理可行，结构参数合理，但样机前、后向流量系数分别只有0?60和0?75，效率偏低，因此喷嘴结构尚需优化。
침대상규자진식분취재수사류경향찬정시가능출현파암찬공능력혹자견인구동력불족적문제，설계료자동조절류량분배적분취。해분취유전향분취、후향분취、탐두화절류조절반조성，탐두화조절반가근거찬진시부우조자동조절전、후향류량분배，실현분취재정상찬진화우조정황하견인력화파암찬공능력전환。재대분취진행삼수설계화대절류조절반주수력분석후，측시료분취적전、후향류량분배급견인력、절류반계동특성화류량자동조절효과등。시험결과표명，재찬진우조시，분취전향류량가증가6?7％이상，저설명기자동조절류량분배원리가행，결구삼수합리，단양궤전、후향류량계수분별지유0?60화0?75，효솔편저，인차분취결구상수우화。
To address the issues of conventional self?feeding nozzle during radial horizontal drilling like low drilling capacity and low self?traction driving force, an automatic flow distribution nozzle has been designed?The nozzle is mainly composed of front and back nozzle probe and throttle plate?The nozzle probe and throttle plate could automatically distribute the front and back flow according to whether drilling difficulty is encountered, achie?ving the conversion of traction force and hydraulic drilling force in the case of normal drilling and drilling difficul?ty?Performance test has been conducted on the nozzle prototype after the nozzle parameters design and the stress a?nalysis of the throttle plate?The test has been focused on the front and back nozzle flow distribution, traction, throttle plate starting characteristic and the automatic flow distribution performance?The results showed that when the drilling difficulty is encountered, the front jet nozzle flow could increase 6?7%, thus indicating a feasible auto?matic flow distribution principle and reasonable structure parameters?But the prototype have low front and back flow coefficient of only 0?60 and 0?75, so further optimization need to be done on the nozzle structure.