在套管或衬管与周围的水泥环之间所形成的小间隙，这些间隙是由于在固井期间或固井之后温度或压力的变化所致。
A small gap that can form between the casing or liner and the surrounding cement sheath, most commonly formed by variations in temperature or pressure during or after the cementing process.
为了得到更精确更趋于实际的测井数据，研究套管和水泥环等对井问电磁测井的影响规律具有非常重要的意义。
In order to get more accurate logging data, it is very important to do research on the influence rule of metal casing and cement sheath to cross-well electromagnetic logging.
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.
结果表明，LDAM水泥浆体系能有效解决小眼井固井漏失气窜问题，并提高了薄水泥环的胶结质量。
The LDAM slurry system shows that it solves the gas-out problems of slim hole and improves the quality of cement circular.
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.
本文介绍偏心度为井深函数的实际环空中压降计算的理论模型和便于现场使用的简化计算方法。
This paper presents a theoretical model for realistic annular pressure loss calculation in which the eccentricity is a function of the well depth and a simplified method for field calculations.
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.
若将水泥浆先注入井中，再将下端封闭的套管下入井内，把水泥浆挤入环形空间，就能保证环空有饱满的水泥浆。
The slurries are injected into well before running in casings with closed bottom end and then running casing make the slurry be squeezed into annulus to improve cementing bonding in small annulus.
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.
小井眼固井由于其井眼尺寸小、环空间隙小，给固井作业带来较大困难，常规固井技术难以保证其固井质量。
Cementing of the slim hole is very difficult due to its small hole size and annular clearance, and the conventional cementing technology cannot meet the requirements of field cementing.
伽马密度测井测量水泥环体密度，这种测量方法与固井各胶结面状态无关。
Gamma density logging method is used to measure the volume density of the cement sheath.
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.
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.
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.
认为固井后环空气窜的主要原因是由于水泥浆失重引起的。
It is considered that the main reason of leading to annular channeling after cementing is due to cement slurry weight loss.
扩孔加大了环空间隙，固井后水泥环厚度和强度增大，可以延长侧钻小井眼油井寿命。
The annular clearance was also enlarged, thus the thickness and strength of the cement sheath was increased, and the oil well life of the sidetracked slim hole was also prolonged.
实践证明它优于常规水泥体系，可提高固井质量和水泥环封隔有效期。
Through practice, the results show that its property surpass regular cement system, and can improve cementing quality and the period of validity of cement sheath plugging.
一种完井部件。它通常包括在接近封隔器的下部组合中。它用来提供在油管与环空之间的连通。
A completion component, generally included in the lower assembly near the packer, that allows communication between the tubing and annulus.
当钻杆进入垂直或水平井段时，大孔径旁通自动打开，将泥浆无阻碍导入环空。
Large bypass ports open automatically as drill pipe is run into the vertical or horizontal wellbore, diverting mud into the annulus above any restrictions.
延迟固井技术主要用在小间隙、窄环空井眼和一些特殊井的固井工艺中。
Delayed cementing technology is mainly used for cementing slim holes, Wells with small annular space and some special Wells.
在尾管内下封隔器，循环确信尾管环空畅通后下入水泥承留器固井。
The liner was cemented by cementing retainer after its annular was assured expedite by setting packer in liner and making circulation.
采用本发明路井清挖机，可使环 卫工人彻底解脱清理路井工作时的繁重体力劳动，并大大提高其工作效率。
By adopting the dredging machine for roads and wells, sanitation workers are thoroughly free of heavy physical labor when cleaning the roads and wells, and the work efficiency is greatly improved.
就位接头与止动环用螺纹联结并上紧扣和钻柱连接下入井内，在未投入止回阀时作为钻柱上的一个接头。
The landing is thread connected with stop ring and tightened on and put into downhole with drill string. The landing sub is used as a sub above drill string before check valve is run in downhole.
其次，在气体钻水平井中，井筒环空流动为气—固两相流。
Secondly, in the horizontal gas Wells, wellbore annulus flow of gas - solid two-phase flow.
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。
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.
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。
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.
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。
Since these jobs were pumped over 6 months ago, the Wells have showed no sign of pressure build-up in the annulus or SCVF.
准噶尔盆地莫北2井区侏罗系三工河组油藏为一典型的气顶油藏，气顶体积是油环的0.91倍。
The Jurassic Sangonghe reservoir in Mobei-2Wellblock is a typical gas-cap pool where the gas cap volume is0.91times as big as its oil ring's.
针对沙盐三井、沙盐四井的首采层修复后，在多次安装采卤树试采卤的过程中，均造成井下中心管堵管或环空堵塞。
After the No. 3 and No. 4 Shayang brine wells repaired, the center pipe had been blocked in the process of brine mining.
针对沙盐三井、沙盐四井的首采层修复后，在多次安装采卤树试采卤的过程中，均造成井下中心管堵管或环空堵塞。
After the No. 3 and No. 4 Shayang brine wells repaired, the center pipe had been blocked in the process of brine mining.
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