EXTERNAL MEASURING NIPPLE FOR LOST CIRCULATION LEAKAGE FLOW WHILE DRILLING

The invention discloses a pipe external measurement nipple for leakage flow of well while drilling. The pipe external measurement nipple comprises a short drill collar, wherein a data transmission assembly is arranged at the upper end of the inner side of the short drill collar; a hydraulic power assembly is arranged at the lower end of the data transmission assembly; the lower end of the hydraulic power assembly is communicated with one end of a three-way oil path; the other two ends of the three-way oil path are respectively communicated with an energy storage assembly and a probe driving assembly. The pipe external measurement nipple has the advantages that the problem of failure to effectively block leakage due to failure to accurately measure the leakage flow of drilling fluid after well leakage occurs in the drilling operation process is effectively solved; by using the pipe external measurement nipple, the non-drilling cycle of treating the well leakage and the complicated condition induced by the well leakage is effectively shortened, the cost of petroleum and natural gas well building operation is reduced, the benefit of the petroleum and natural gas well building operation is increased, and the pipe external measurement nipple is a petroleum and natural gas while-drilling measuring tool with higher economic value and popularizing value.