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四川石油管理局于1991年10月7日在新都县召开新产品鉴定会,对成都总机械厂研制的川石不等压力流场钻头进行了技术鉴定。不等压力流场钻头改进了常规三牙轮钻头的清洗结构。先进的清洗结构使井底流场的径向压力不均衡,形成横向漫流;这种横向漫流有更大的活动范围和更强的方向性,因而有更佳清洁井底的能力。该钻头水力结构特殊,喷管上装有加交喷嘴,钻头体中
Sichuan Petroleum Administration held a new product appraisal meeting in Xindu County on October 7, 1991 to conduct technical appraisal on the unequal pressure flow field drill bit developed by Chengdu General Machinery Factory. Unequal pressure flow field drill improves the cleaning structure of conventional tri-cone bits. Advanced cleaning structures unbalance the radial pressure in the downhole flow field and create a lateral flow; this lateral flow has a greater range of motion and stronger directivity, thus providing a better ability to clean the bottom of the well. The hydraulic structure of the drill bit special, equipped with nozzles on the nozzle, bit body