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。
Rotating casing is helpful to improve effectively mud displacement efficiency and thus improve cementing quality.
旋转套管可以有效提高水泥浆顶替效率，从而提高固井质量。
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。
A device used to hold plugs until they are released and pumped down the casing during cementing operations.
一种装置，用于在注水泥作业过程中悬挂胶塞，直到将其释放并在注水泥作业中沿套管内泵入。
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。
In strength of casing, based on analyzing the influences made by cementing, perforating and non-uniform, the concept of decrease factor of casing strength.
在套管的强度方面，分析了水泥坏、射孔、非均匀载荷等套管强度的影响，提出了套管强度减弱系数的概念。
The outer casing packer can be used in the troublesome Wells in which the high pressure gas channeling and the loss of circulation occur, to improve the cementing quality.
套管外封隔器可用于有高压气窜、恶性开漏等复杂情况井的固井，使固井质量有所提高。
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.
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。
It connects with threads on both ends of pipe body, which allows a smaller casing O. D. and increases annular gap to facility casing running in and improve cementing quality.
无接箍式套管靠管体两端的螺纹连接，所以套管外径尺寸小，可增大环形间隙，便于套管下入和提高固井质量。
The configuration and principle of anti rotary plug and necessary float collars and their applications in intermediate casing cementing are introduced.
介绍了防转胶塞及配套浮箍的结构、原理和在技术套管固井中的应用情况。
Floating displacement cementing technology and flush joint casing technology are the first application in sidetracking well of Dagang Oilfield.
漂浮顶替固井工艺、无接箍套管工艺技术是首次应用在大港油田侧钻井上。
Small-clearance casing, playing an important role in cementing, can enlarge the effective cementing clearance, facilitate the casing running-in, and improve the cement bond quality.
窄间隙套管可有效增大固井间隙，有利于套管的下入和水泥封固质量的提高，具有重要的用途。
The production casing cementing problems in Tahe Oilfield in 1998 are analyzed, and the main reasons causing low cementing quality are found.
针对塔河油田1 998年生产套管固井质量存在的问题进行了分析，找出了影响固井质量的主要因素。
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。
Multistage cementing is used for long casing strings to reduce pump pressures and to reduce pressure on the formations.
多级注水泥用于长套管柱，以降低泵压并降低作用于地层的压力。
The wellbore stability, fracturing, cementing strength, and casing failure during thermal recovery are affected by thermal stress.
井壁热应力对于井壁稳定性、水力压裂、水泥环胶结强度、热采套管的损害等都有影响。
It can couple with two plugs simultaneously, and makes the drilling fluid fill into casing in turn and quickly. This can simplify the cementing operation, prevent cement pollution.
可同时装两个胶塞，既可用于常规双塞固井，又可用于连续式双级注水泥作业。
It can couple with two plugs simultaneously, and makes the drilling fluid fill into casing in turn and quickly. This can simplify the cementing operation, prevent cement pollution.
可同时装两个胶塞，既可用于常规双塞固井，又可用于连续式双级注水泥作业。
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