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
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。
The research of supersonic multi-nozzle ejector reverse circulation bit
超音速多喷嘴引射器式反循环钻头研究
Experimental and Drill Bit Flow Field Analyze of Run-through DTH Reverse Circulation Drilling Technique;
贯通式潜孔锤反循环钻进技术试验及钻头流场分析
5.8 Circulate for one and a half hour and then pull the string out at 14:30.
循环一个半钟头，14:30起钻。
Application of CJF Series Strike Backcycling Engineering Driller
CJF系列冲击反循环工程钻机的应用
Principle and Application of Air-lift Reverse Circulation in Bored Pile
钻孔灌注桩气举反循环的原理与应用
Hole Clearing by air-lift reverse circulation method in bored piles
冲(钻)孔灌注桩气举反循环清孔工艺
STUDY ON HYDRAULIC ANTI-REVOLVE CORE SAMPLING TECHNIQUE OF PIT BORING WITH SINGLE TUBE
坑内单管水力反循环取心钻探技术研究
Theoretical and Experimental Research on Reverse Circulation Constant Sampling and Powerful Compressed Air Spurting Drilling Technology;
反循环强力气体喷射钻进技术理论及试验研究
The Parameters Optimization of the Reverse Circulation DTH Hammer and Studies on Its Drilling Technique;
全孔反循环潜孔锤参数优化及其钻进工艺研究
The Development of CHF-20 Percussive-Rotary Reverse-circulation Drill;
CHF-20型冲击—回转反循环工程钻机的研制
The Application of Pump Reverse Circulation Drilling Technique in Dewater Construction
泵吸反循环钻进工艺在降水工程中的应用
Talk to application of counter circulating drill hole pour pile construction technique in engineering
谈钻孔反循环灌注桩施工技术在工程中的应用
Application of backcycling in drilling cast-in-place pile of bridge
反循环工艺在桥梁钻孔灌注桩中的应用
Application of Air-lift Reverse Circulation Drilling in Baoli ZK3 Deep Geothermal Well of Guizhou
气举反循环钻进技术在地热深井施工中的应用
On the application of the cast-in-place bored piles' reverse circular technique in No.3 Bridge of Wei river
钻孔灌注桩反循环工艺在渭河三号桥中的应用
Research of Application and Drilling Tool Optimization of Reverse Circulation Drilling Technique with Hollow-Through DTH Hammer
贯通式潜孔锤反循环钻进技术钻具优化及应用研究
APPLICATION OF BIG BORE REVERSE-CIRCULATION CORING CABLE DRILLING TO CAVERN OF LIMESTONE
大口径冲击反循环钻进方法在岩溶地层中的应用
Applications of Clear Water-gas-lift Reverse Circulation Drilling Technology to Deep-well Construction
清水气举反循环钻探工艺在深水井施工中的应用