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论述了SKG油管自动测长方案的基本原理和可行性。介绍了SKG油管长度自动测长仪，经对3口井的累计测量，误差均小于全0．05％，达到使用要求。可在复杂的工况下实现油管自动测长。
The basic principle and feasibility of automatic measurement of SKG tubing are discussed. The automatic length measuring instrument of SKG tubing length was introduced. The accumulated errors of three wells were less than 0.05%, which met the requirements of operation. In complex conditions to achieve automatic tubing length measurement.