井径仪是完井测井系列的仪器之一 ,也用于生产测井。井径曲线在工程上用于评价井身质量、计算水泥量 ,在解释中用于岩性对比、划分层位。但目前使用的井径仪设计不够合理 ,电机负荷过重 ,而且电机工作姿态倒置 ,使用寿命短 ,导致井径仪测井成功率很低。为此 ,设计了新型井径仪 Caliper is one of the instruments used to complete the well logging series and is also used for production logging. The caliper curve is used in engineering to evaluate wellbore quality, calculate the amount of cement used in interpretation for lithologic contrast, and to demarcate the horizon. However, the current caliper design used is not reasonable enough, the motor load is too heavy, and the working attitude of the motor is inverted, and the service life is short, resulting in a very low success rate of the caliper logging. To this end, designed a new caliper