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２６＂Ｐ_２Ｃ新型钻头首次在川东地区进行试验四川石油管理局成都总机械厂试制的２６＂（６６０．４ｍｍ）Ｐ２Ｃ新型钻头，喷嘴组合为：φ２０ｍｍ喷嘴三只＋φ１５ｍｍ中心喷嘴一只，该中心喷嘴能够消灭井底液流死角，改善井底净化效果，有效地防止钻头泥包，提高机械?..
26 “P_2C New Type Drill First Test in East Sichuan Region The new 26” (660.4mm) P2C trial drill made by Chengdu General Machinery Factory of Sichuan Petroleum Administration Bureau has the following nozzle combinations: φ20mm nozzle three + φ15mm center nozzle, the center nozzle Can eliminate the dead ends of fluid downhole to improve the bottom of the purification effect, effectively prevent the drill trowel, improve the mechanical?