The ideal performance of cement sheath should be high intensity with low stiffness.
理想水泥环的性能应该是高强度、低刚度。
Gamma density logging method is used to measure the volume density of the cement sheath.
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。
Destruction of cement sheath outside casing is one of the causes for channeling and corrosion.
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。
Cement sheath are the main composites for cementing well and isolating the pay zone together with casing pipes.
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。
A comparison is made on the anti-collapse capability of the casing with and without cement sheath by means of full-scale test.
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。
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。
In order to dissolve the cement sheath fully and ensure the operation safety, we determine the reaction time, acid flushing turns and operation process.
以充分溶解水泥环为目的，以保证施工安全为前提，确定了酸洗的反应时间、次数和施工工序。
It is one of the important factors of ensuring the seal quality of cement sheath in a small clearance to raise slurry displacing efficiency in a slim hole.
提高小井眼水泥浆的顶替效率，是保证小间隙水泥环密封质量的重要因素之一。
The later usually raises the most concern and is perhaps the hardest goal to achieve when there is potential for formation gas to migrate into the cement sheath.
但层间封隔问题更引人注意，特别是当有气体侵入水泥环中的可能时更是难以达到预期目标。
Plastic cement solves cracking problem of cement sheath successfully. With high strength fiber added in, not only the strength, but also the flexibility is increased.
塑性水泥可以很好地解决水泥环的脆裂问题，它通过掺入高强度纤维，不仅可增加水泥石的强度，而且可改变水泥石的弹性。
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.
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。
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.
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。
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.
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 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.
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。
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.
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。
Casing-cement sheath and formation formed a vertical hydraulic isolation system; hydraulic isolation ability of the system formed by cementing mainly depends on defection and strength of the system.
固井水泥凝固后形成了一个纵向上的水力封隔系统，影响这个系统水力封隔能力的因素包括系统的缺陷和系统的强度。
A bare winter tree, a holdout on cement-bound Third Avenue in New York City, emerges from an unlikely square of bricks, its base encased in a protective sheath.
冬天光秃的树，水泥边框里树槽，暴露在零乱的广场砖中，被保护圆套包围着。
A bare winter tree, a holdout on cement-bound Third Avenue in New York City, emerges from an unlikely square of bricks, its base encased in a protective sheath.
冬天光秃的树，水泥边框里树槽，暴露在零乱的广场砖中，被保护圆套包围着。
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