井径测井 井径测井仪是用来测量钻孔直径的。在未下套管的井中可以测量井径不规则程度，提供下套管固井施工所需要的水泥用量参数；还可根据钻孔的不规则形态，分析判断地下岩层裂缝的发育程度和裂缝的方向。在套管受损坏的井中，可以测量套管损坏的位置和变形情况。
井径测井主要用于确定套管内径变化、射孔孔深及接箍深度等。
Caliper logging is mainly used to determine the change of inside diameters of casings, perforating depth and the depth of collars.
经过改进的三臂井径测井仪器用3条臂的电位器串联来响应井眼内径的变化。
The modified logging tool with 3arm caliper responds to changes of hole inner diameter by serial potentiometers.
为了深入研究套损机理，减少油水井套管的损坏，提出了新的多臂井径测井解释方法。
In order to study the theory of casing damage and reduce the casing damage of oil-water Wells, a new log analysis method of multi-armed caliper log is expounded.
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