Moreover, the wellbore annulus pressure increased with the increasing of invaded formation water quantity. but the amplitude is not obvious.
此外，井筒环空压力也随着地层水侵入量的增加而增大，但增幅不明显。
Based on field investigation and statistical data, the relation plate of annulus pressure differential, interlayer differential and cementing quality is plotted.
结合现场调查和统计规律，建立了环空压差和层间压差与固井质量的关系图版。
Without keeping annulus pressure to static and instead of special metering by simple mechanical pressure ba lance structure, this valve is conducted by annulus pressure.
该阀采用环空外压操作测试阀的开关，不需要保压，而且采用简单的机械压力平衡机构代替了专用计量套。
PCTH tested valve has the function of being open state constantly and that keeping on open after annulus pressure relived out makes it much handy and be liable to be used.
PCTH测试阀可实现持开的功能，环空泄压后仍能保持开启状态，使用起来更加方便、灵活。
The experimental study on the relationship between annulus pressure differential, interlayer differential and cementing quality is carried out on the lab simulation test unit.
室内利用模拟试验装置进行了环空压差和层间压差与固井质量的关系的试验研究。
Many pressure dominated testing valve is through pumping of relieving annulus pressure to realize open or shut down hole test valve and keep annulus pressure for certain all the time.
许多种压控测试阀均是通过环空加泵压打开，泄掉泵压关闭，开井过程中环空始终保持一定的开启压力。
In this paper, the prediction of void fraction and pressure drop for upward gas-liquid annular flow in a vertical annulus is studied.
对垂直同心环形管内上升气液环状流的截面含气率及压降预测进行了研究。
Moreover, the pressure lost of rectangular annulus is bigger than that of triangular one.
另外，矩形环的压力损失大于三角形环。
Thermal behavior of vacuum concentric tube annulus is a process involving combined heat transfer mode, in which the thermal conduction of low pressure gas plays an important role.
真空同心管套涉及传导、辐射等传热方式，其中低压气体的热传导非常复杂，是分析问题的关键。
The under-balanced drilling technology is based on how to control the bottom negative pressure which is related to the pressure computation of multiphase flow in annulus .
井底负压值控制是欠平衡钻井技术的基础，而井底负压值的大小与环空多相流的有关压力计算有关。
And the bottom hole pressure in different depths is predicted, which can be found that the casing annulus velocity declines with the depth increasing at different hole depth.
并对不同井段处的井底压力进行了预测，发现在不同的井身深度条件下，其环空流速随井身深度的增加而降低。
The annulus between the 9-5/8" and the 13-3/8" casing strings within a Norwegian field development had historically exhibited pressure buildup at surface on many wells.
在位于挪威油田的许多油井中，9-5/8”与13-3/8”套管柱之间的环空突然出现了地面压力升高的情况。
Since these jobs were pumped over 6 months ago, the Wells have showed no sign of pressure build-up in the annulus or SCVF.
由于这些工作已超过6个月前泵，井已经表明集结在环或SCVF没有压力的迹象。
The purpose of cement bond log (CBL) under increasing borehole pressure is to differentiate micro annulus from bypass channel.
在井内加压下进行水泥胶结测井带压作业，其目的是将微环空与串槽区分开。
An optimal model is proposed for predicting the pressure drop of two-phase flow in gas well tubing and annulus, based on the measured data from the gas field of southwest Sichuan, China.
根据川西南威远气田大水量气井现场测试数据，建立了举升油管和油套环空气液两相流压降优化模型。将油管内的持液率模化为气相、液相无因次速度和液相无因次粘度的函数；
The steady-state flows in drill pipe and in annulus are analyzed and the variations of pressure, gas void fraction, and multiphase-flow density along the well depth are simulated.
举例分析在环空和钻柱内的稳定流动过程中，随井深增加，压力、含气率、多相流体密度等的变化规律；
High precision sodium pressure transducer using the dynamometric annulus as the Sensor is developed.
本文研究了一种以测力环为敏感元件的高精度钠压力传感器。
So it is recommended that the pressure differential between the casing and the annulus be increased to improve the cementing quality if the downhole conditions permit.
建议在井下条件允许的情况下，增加环空与套管内的压差值来提高固井质量。
So it is recommended that the pressure differential between the casing and the annulus be increased to improve the cementing quality if the downhole conditions permit.
建议在井下条件允许的情况下，增加环空与套管内的压差值来提高固井质量。
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