There exists a spiral clearance space in the API round thread casing joint which is effected by the thread tolerance ranges.
API套管圆螺纹自身存在牙间间隙，并形成螺旋状空间间隙带。
Perforation effect is seriously affected by the clearance between perforator and casing.
射孔枪与套管之间的间隙过大会影响射孔效果，太小容易出现工程事故。
The simulation results show that both the circumferential slot casing and stepped clearance structure can enlarge the compressor stable operating range to a certain extent.
周向槽机匣与梯状间隙结构都能在一定范围内起到扩稳作用。
The focus of this investigation is on the nonuniform clearance caused by casing deformation and its effect on the flow field characteristics of the rotor rows.
针对由机匣变形造成的非均匀叶尖间隙，研究了其对多排转子流场特性的影响。
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。
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。
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