经过数目的成功试验之后,在 BOY-LES 公司的液压钻机钻探队中新增加了反循环钻进法。据报道,数千英尺的实际钻进工作证明,由于操作费用和设备成本较低,使反循环钻进成本大为降低。因为 BOYLES 公司的液压钻机需要的基台较小,进入施工地点不需要修建很多通路,能够在交通不便的地区进行钻进作业。这种钻机既可以进行反循环钻进,又可以进行孔段取芯钻进,因而免除了更换钻机的费 After a number of successful trials, a new reverse circulation drilling method was added to BOY-LES’s hydraulic drilling rig. It has been reported that thousands of feet of actual drilling work proves that reverse cycle drilling costs are greatly reduced due to lower operating costs and equipment costs. Because BOYLES hydraulic drilling rigs require a small abutment, there is no need to build a lot of access to the construction site to drill in areas with limited accessibility. This rig can be both reverse circulation drilling, drilling holes can be core drilling, thus eliminating the cost of replacing the rig