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。
New model for calculating bottom hole pressure of multiphase flow in annulus of underbalanced straight well;
欠平衡钻井环空多相流井底压力计算模型
Slug flow appears very often in swabbing well and usually results in complexity of bottom hole pressure change,and swabbing recovery may make bottom hole pressure more unforeseeable.
抽汲井极容易出现段塞流而导致井底压力变化非常复杂,采用的抽汲生产将进一步加剧井底压力的不可预见性。
By this method, variation of gas productivity with time under the fixed bottomhole pressure can be derived as well the variation of gas well bottomhole pressure at the fixed production rate.
这不仅可以得到定井底流压条件下的气体产量变化关系,同时还可得到定产量条件下的气井井底压力变化关系。
The bottomhole pressure control technology is one of the key technologies in underbalanced drilling.
在欠平衡钻井过程中,井底压力控制技术是其关键技术之一,为准确掌握井底压力的大小,提高井底负压控制精度,开展了3项关键技术研究。
During the period of pressure build-up, response to the bottomhole pressure has the characteristics of formation per.
建立了考虑压力敏感地层测试数学模型与数值模型,模拟和分析了不同压力敏感程度地层测试井底压力响应特征。