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.
模型中包括射孔孔眼、套管、水泥环、油层、微环隙和横向裂缝。
The model consists of perforation, wellbore, cement casing, oil layer, micro-annulus and transverse fracture.
浮鞋能够防止环空中的水泥浆向套管内流动这种回流或者U型管效应的发生。
The float shoe prevents reverse flow, or U-tubing, of cement slurry from the annulus into the casing.
但是在严重的情况下，微环隙可围绕整个套管圆周。
However, in severe cases the microannulus may encircle the entire casing circumference.
以黏弹性流变模型理论为基础，建立软岩层、水泥环和套管流变耦合的力学模型。
Based on the theory of the viscoelastic rheological model, the coupled mechanical model of the soft rocks, the concrete sheath and the casing is developed.
水泥石是构成井下水泥环的主要材料，它和套管共同起到层间封隔的作用。
Cement sheath are the main composites for cementing well and isolating the pay zone together with casing pipes.
经工作套管放置内镜(它带有手术光源和小摄像机)，允许外科医生通过视频屏幕观察纤维环、椎间盘、硬膜外间隙。
An endoscope (which contains a surgical light and small camera) is placed through the tube, allowing the surgeon to view the annulus, disc, and epidural space on a video monitor.
根据应变协调条件，推导出了套管、水泥环及地层受力变形状态的计算公式。
According to strain coordination condition, the force and deformation state formulas of casing, cement loop and stratum are derived.
最后得出结论——振动注水所产生的脉动压力不会对套管、水泥环及地层造成损坏。
Finally, the conclusion is that the pulse pressure caused by vibrated water injection can not damage to casing pipe, cement sheath and formation.
最后对现场实测资料进行了套管-地层环空间内介质的波阻抗定量反演与成像。
Wave impedance inversion and imaging of the medium between the casing and the formation based on the practical data of an oil field are carried out.
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.
套管外水泥环的破坏是导致管外串槽、套管外腐蚀的原因之一。
Destruction of cement sheath outside casing is one of the causes for channeling and corrosion.
水泥环的弹性参数和泥岩含水量等对套管外载有一定影响。
The external non liner loading of well casing can be improved by changing elastic parameters of the cement mantle.
如环空测试工艺，套管外固定测试工艺，随油管捆绑测试工艺等。在测试过程中对正常生产没有影响。
Such as Annulus testing, casing outer set testing, With tubing bundle testing, etc... Not affect normal production in the course of testing.
采用全尺寸实物试验方法对套管有无水泥环情况下的抗挤毁能力做了对比试验。
A comparison is made on the anti-collapse capability of the casing with and without cement sheath by means of full-scale test.
对气管套管气囊的位置、气管套管末端的位置及无名动脉对应的气管环的位置进行了观察。
The gas pool position of trachea casing pipe, the end position of the trachea casing pipe and the position of trachea hoop against anonymous artery.
本冷凝器是由一组套管、弯头、金属软管、紧固件、F4橡胶内衬不锈钢波纹环垫片及支架组成。
The condenser is a tube, elbow, metal hoses, fasteners, F4 rubber lined steel corrugated ring gasket and support component.
聚四氟乙烯内衬直管，套管，弯头，三通，四通，大小头，筒体，空压机-制氧机- 活塞环、密封圈和汽配封圈。
Teflon - lined pipe, casing, elbow, the three exchanges or four, size head, cylinder, air compressor - oxygen - ring, gasket seal ring and auto parts.
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.
射孔目的就是射穿套管、水泥环和地层内一定的深度，为地层的油气流入至井筒，形成一个顺畅的通道。
The purpose of perforation is penetrating the casing tube, cement sheath and a certain depth of the formation and forming unhindered channels for oil and gas flowing into the well casing.
针对套管的不同初始椭圆度建立了套管、水泥环、地层平面应变力学模型。
Casing, cement and formation plane strain mechanical model are established, considering casing with initial ovality.
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.
用于永久封隔套管和井壁之间的环型空间的材料。
The material used to permanently seal annular Spaces between casing and borehole walls.
研究了带有同心套管的垂直圆柱形加热表面在环隙中通入空气时的核沸腾传热性能。
Nucleate boiling heat transfer on a vertical cylindrical heated surface with a concentric outer tube was investigated when air was introduced into the boiling liquid.
通过高强螺母的紧固保证钢套管与锚环之间良好连接。
The good connection between the steel sleeve and the anchor ring is ensured by the fastening of the high strength screw nut.
结合油井试采工程实际问题，研究了圆形和椭圆形两种形状的多个射孔对套管-水泥环结构强度的影响。
The influences of multi-openings with different shapes on a casing-cement cylindrical shell are studied in this paper, combined with practical engineering of oil Wells.
本文采用有限元计算方法研究了微环厚度对套管井声波测井初至波幅度的影响。
The dependence of amplitude of first break for acoustic logging in cased borehole on the thickness of microannulus is studied in this paper with Finite Element Method (FEM).
用应力环腐蚀试验和三(四)点弯曲试验研究了某J 55(即石油套管)渗氮套管在不同试验条件下的腐蚀行为，并和未渗氮套管的抗腐蚀性进行了比较。
The resistance of nitrided J55 casing to sulfide stress cracking (SSC) was studied by C-ring testing and three-point bending testing under different conditions.
用应力环腐蚀试验和三(四)点弯曲试验研究了某J 55(即石油套管)渗氮套管在不同试验条件下的腐蚀行为，并和未渗氮套管的抗腐蚀性进行了比较。
The resistance of nitrided J55 casing to sulfide stress cracking (SSC) was studied by C-ring testing and three-point bending testing under different conditions.
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