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- air reverse circulation bit 空气反循环钻头
- Air driven hollow DTH hammer is applied,along with a set of dual wall drilling pipe and a specially designed reverse circulation bit,to conduct continuous coring reverse circulation drilling. 气动贯通式潜孔锤与双壁钻杆及专门研制的反循环钻头 (获国家发明专利 )配套使用 ,可实现反循环连续取心 (样 )钻进新工艺 ,连续获取的岩样采取率高 ,品质好 ,代表性强。
- Emulator analyse on rake angle of injector hole in reverse circulation bit 反循环钻头引射孔倾角的仿真分析
- Test and Research on Flow Parameters in the Air Reverse Circulation Drilling Pipe Lines 空气反循环钻探管路中介质及固相参数的测试与研究
- Testing of the Air Reverse Circulation Drilling Process in Geo-physical Blast hole Drilling 空气反循环钻进工艺在物探爆破孔施工中的试验应用研究
- Keywords twofold wall drill tools;up return velocity;deepen;air reverse circulation; 关键词双壁钻具;上返速度;加深;气举反循环;
- Improvement of DTH reverse circulation bit and its emulator on interior fluid field 潜孔锤反循环钻头体的改进与内部流场的仿真分析
- Keywords hollow DTH hammer;reverse circulation bit;dual drilling pipe;continuous sampling;benefit; 贯通式潜孔锤;反循环钻头;双壁钻杆;连续采样;效益;
- air reverse circulation 空气反循环
- reverse circulation bit 反循环钻头
- reverse circulating bit 反循环钻头
- According to the exploration problems in an open-pit mine,a new drilling method using reverse circulation DTH hammer drill is put forward. 针对露天矿钻探施工中存在的问题,提出了利用贯通式反循环潜孔锤进行施工的新方法。
- The drill can be used in the drilling technologies of normal or reverse circulation in the quaternary period gravel or hand rock ground. 演练中，可用于钻井技术的正常或反循环在第四纪时期，砾石或手岩石地面。
- The procreative blanking plug of the "Y type" pipe string has check valve function and it can conveniently for reverse circulation well cleanup. 型管柱中的生产堵塞器具有单流阀作用,可方便进行反循环洗井;同时,具有独特外泄压系统,使堵塞器打捞在压力平衡状态下进行,且密封可靠,保证所取资料的准确性。
- Barge was used in sea pile construction,and FGC-15D large diameterwet reverse circulation DTH was adopted for hole completion. 利用驳船进行海上基桩施工，采用FGC-15D型大直径湿式反循环潜孔锤钻进成孔，满足施工工艺和工期要求。
- Air Lifting Reverse Circulation Bits 气举反循环钻进用钻头
- The paper introduced the use of airlifting reverse circulation rotary drilling techniques in practice of major diameter socket pile operation at Xiangfan city s Hanjiang No. 介绍了使用泥浆护壁气举反循环回转钻进工艺进行襄樊汉江四桥大口径嵌岩桩的施工实践。
- The special reverse circulation swivel that matches with the improved shaft is developed.The construction and application of the swivel are introduced in this paper. 本文介绍了所设计的反循环水龙头的结构组成及其现场使用情况。
- Back Exhaust Air Device: It can prevent the air reversing in the common exhaust gas pipeline of kitchen and toilet. 止回排风装置：止回排风系统能够有效减少厨房间、卫生间公用排气管道内的气体产生反风；
- Manufacture and improvement on self-propelled direct and reverse circulation construction drill is introduced with the main technique parameter,specification and pilot production. 介绍了自走式正反循环工程钻机的研制改进概况以及主要技术参数、性能特点、生产试验情况等。
