本文对“空环”的阐释理据主要包括两个方面：认知经济原则和信息度理论。
In this thesis, the theoretical base of missing links is discussed in terms of two theories: cognitive economy principle and informativity theory.
驾驶舱门(防劫机系统)被大大加强，更多的空军力量保持着在空巡逻，出入境这一环节上也鲜有差池。
Cockpit doors have been reinforced, more air marshals patrol the skies, and better records are kept on those entering the country.
窜气，基本上是被压缩的空燃混合气和燃烧后的气体的泄漏，它通过活塞环进入曲轴箱。
Blowby is basically the leakage of compressed air-fuel mixture and burned gases past the piston rings into the crankase.
我一定要在醉花丛中氤氲的树影里寻找，在那里，鸽子在它们的角落里咕咕地叫着，精灵的脚环在繁星满空的静夜里叮当作响。
I must search in the drowsy shade of the bakula grove, where pigeons coo in their corner, and fairies' anklets tinkle in the stillness of starry nights.
井眼的环空体积为115方。
本文应用物质平衡原理，研究了抽油井环空拟液面在测试过程中的运动规律。
Based on the principle of mass balance, this paper deals with rules of. motion of the pseudo-fluid level in the annular space in the process of testing the pumping oil well.
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。
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.
在此主要介绍了环空压裂悬挂器的设计原理、试验和推广应用情况，应用效益显著。
Design principle and experiment and popularized application of annular fracturing hanger are introduced in this paper, its application effect is notable.
油基环空保护液是非腐蚀性的，但单位成本高、环境污染严重，不能广泛应用。
Oil base annulus protection fluid is not corrosive, however, its high cost and environment pollution restricts its universal use.
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。
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 .
空气钻井是一种钻井工艺，是指利用气体去冷却钻头和把岩屑举升出油井环空，而不是利用更常使用的流体。
A drilling technique whereby gases (typically compressed air or nitrogen) are used to cool the drill bit and lift cuttings out of the wellbore, instead of the more conventional use of liquids.
泥浆密度增加可使环空岩屑床面积大大降低。
The raising in mud density can reduce the area of cuttings bed .
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。
The purpose of cement bond log (CBL) under increasing borehole pressure is to differentiate micro annulus from bypass channel.
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；
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.
在空气雾化钻井中，井眼环空携岩流动是一种典型的气、液、固多相流动，其机理和规律十分复杂。
In air and mist drilling, annular carries are the typical of gas, liquid and solid multiphase flow, and its mechanism and principles are very complicated.
在投加环空保护液后，环空腐蚀速度远远小于油管内腐蚀速度。
After the fluid is used, the annulus corrosion rate is more lower that that of tubings.
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。
Based on field investigation and statistical data, the relation plate of annulus pressure differential, interlayer differential and cementing quality is plotted.
提出了一种减小钻井泥浆环空循环压耗的井下工具，介绍了该工具的结构、工作原理、技术参数。
Therefore, a downhole tool that can reduce the annular cyclic pressure loss and introduced its structure, principle of work and technical parameters were put forward.
分析结果表明，环空偏心距、内管冲程、内管冲次对瞬时流量分布的影响较为明显。
Analyses indicate that the eccentricity, the stroke and the frequency of the inner cylinder all affect the instantaneous flow rate distribution remarkably.
配注器装有孔口阀和单向阀系统，使泵入的流体沿环空向下或沿注入管线向下进入生产导管。
The injection mandrel is equipped with a port - and check-valve system to direct fluid pumped down the annulus or injection line into the production conduit.
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。
The experimental study on the relationship between annulus pressure differential, interlayer differential and cementing quality is carried out on the lab simulation test unit.
在抽油井的抽油过程中和关井期间测量环空内液面高度的一种声波测井方法。
A sonic tool used in a pumping well to determine the distance to the top of the fluid in an annulus during pumping and shut in.
由于携砂液向地层的滤失以及通过筛管缝隙的流体质量交换，水平井砾石充填过程中冲筛、井筒环空两个流动系统均为复杂的变质量流。
During the process of gravel-packing in horizontal Wells, there are the filtration flow of the carrier fluid to the formation and the exchange flow through the screen slots.
在煤层气井排采过程中，通常用回声仪来监测环空液面变化，通过控制液面下降速度来实现稳定、连续降压。
The echometer was used to monitor the change of the annular water level in the coal- bed methane(CBM)wells production, which could decrease pressure stably and continuously.
建立了偏心度在井眼内按线性及正弦规律变化的偏心环空流问题理论模型。
The model established in this paper puts forward two situations, a linearly and a sinusoidally skewed annulus.
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.
分析结果表明，环空偏心距、内管冲程是影响瞬时流量分布的主要因素。
Analyses indicate that the eccentricity and stroke of the inner cylinder are the main factors that affect the instantaneous flow rate distribution.
对水平井段偏心环空中幂律流体和宾汉流体轴向流层流流场作了理论分析。 把偏心环空视作变外径的同心环空。
The theoretical analysis of flow properties of power-law fluids and Bingham fluids in the eccentric annuli of horizontal section of wells is made.
水泥浆环空流动的壁面剪应力是影响顶替效率的关键因素。
The wall shear stress caused by cement slurry flowing in the annular space is a key element that affects the displacing efficiency.
水泥浆环空流动的壁面剪应力是影响顶替效率的关键因素。
The wall shear stress caused by cement slurry flowing in the annular space is a key element that affects the displacing efficiency.
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