1.
					
							BHA's relative rigidity
						
					
					
						
						
					
					
						底部钻具组合的相对刚度
					2.
					
							stiff bottom hole hook up
						
					
					
						
						
					
					
						刚性的下部钻具组合
					3.
					
							weight-responsive bottom-assembly
						
					
					
						
						
					
					
						对钻压敏感的井底钻具组合
					4.
					
							BHA directional behavior
						
					
					
						
						
					
					
						底部钻具组合定向特性
					5.
					
							multistabilizer BHA
						
					
					
						
						
					
					
						多稳定器底部钻具组合
					6.
					
							BHA finite element model
						
					
					
						
						
					
					
						底部钻具组合有限元模式
					7.
					
							semipacked bottom-hole assembly
						
					
					
						
						
					
					
						半封隔井底钻具组合
					8.
					
							three-dimensional bottomhole assembly model
						
					
					
						
						
					
					
						三维井底钻具组合模式
					9.
					
							Study on Structure of Reaming While Drilling Tools and Design of Suitable Bottom-Hole Assembly;
						
						
						随钻扩眼工具结构及与之相匹配的钻具组合设计方法研究
					10.
					
							fully stabilized rotary assembly
						
					
					
						
						
					
					
						全稳定的旋转钻具组合
					11.
					
							Mechanical Performance and Fatigue Failure of Bottom Hole Assembly;
						
					
					
						
						
					
					
						下部钻具组合力学特性分析及疲劳失效研究
					12.
					
							steerable downhole motor assembly
						
					
					
						
						
					
					
						可转向的井下马达钻具组合
					13.
					
							2.3  What is the BHA of this well?
						
					
					
						
						
					
					
						这口井的钻具组合是什么?
					14.
					
							Development of core drill equipment for combined underwater drill rammer of rock built-in pile hole
						
						
						嵌岩桩孔组合潜孔锤取心钻具的研制
					15.
					
							Research on Appropriate Stiffness Ratio of Transfer Girder to Bottom Column
						
					
					
						
						
					
					
						转换梁与底部柱线刚度比合理取值研究
					16.
					
							Strength Analysis of Pressure and Torsion Combination Loads of Flapper Teeth of LTC
						
					
					
						
						
					
					
						螺杆钻具瓣形万向轴瓣齿压扭组合强度分析
					17.
					
							and are fitted with a cutting bit at the bottom.
						
					
					
						
						
					
					
						它的底部装有钻头。
					18.
					
							Safety of transportable motor-operated electric tools--Part 2: Particular requirements for diamond drills with water supply
						
						
						GB13960.7-1997可移式电动工具的安全第二部分:带水源金刚石钻的专用要求