Effects of stress field in bottom hole on borehole deviation during gas drilling
井底应力场对气体钻井井斜的影响
In order to explore the effect of ambient pressure on jet flow field in deep well and ultra-deep well, a physical model for flow field of confined water jet at bottom hole was established.
考虑到深井、超深井中井底围压对射流流场有一定的影响 ,建立了井底受限射流流场的物理模型。
When the pumping well runs normally, self-excited pressure wave can be generated at bottom hole by means of wave generator.
抽油井正常工作时，借助波动器可在井底产生自激压力波。
The measurement and analysis of craters and bottom-hole pattern is an important link of drilling test and a key means of studying rock-breaking mechanism and valuating rock-breaking efficiency.
岩石破碎坑和井底的测量分析是钻头实验技术中的重要环节,也是钻头破岩机理研究和钻头性能评价的重要手段,而现有的测量分析方法精度或效率较低。
Numerical calculation and experimental study of drilling shaft bottom in special thick alluvium;
特厚表土层钻井井壁底的数值计算与试验研究
Optimizing schemes of drilling shaft bottom in special thick alluvium;
超深厚表土层钻井井壁底的方案优化设计
balanced bottom hole pressure method
井底压力平衡压井法
rathole gravel slurry
井底口袋内的砾石砂浆
draw-down bottom pressure curve
抽汲期间井底压力曲线
surface pressure read-out
地面直读井底压力计
wireline downhole guidance tool
钢丝绳井底导向工具
inflow production relation
井底流压-产量关系
semipacked bottom-hole assembly
半封隔井底钻具组合
three-dimensional bottomhole assembly model
三维井底钻具组合模式
The stone fell 10 metres before reaching the bottom of the well.
石头落下十米才到井底。
circulating out fill
循环带出井底沉淀物
surface-recording gauge
地面记录的井底压力计
buoyant off-bottom connection method
浮式离开井底接管法
The water at the bottom was like a mirror.
井底的水像一面镜子。
Code for design of chambers around pit-bottom of coal mine
煤矿矿井井底车场硐室设计规范
On application of value engineering in selection of bottom-hole yard scheme of inclined shaft
价值工程在斜井井底车场方案比选中的运用
solid state downhole recorder
固态集成电路井底记录仪
solid state downhole processor
固态集成电路井底资料处理仪
leg base anchorage
井架大腿底脚的固定