The infrared thermometer is very sensitive to temperature and has a high degree of aggregation. The temperature measurement range can be controlled within a diameter range of 3mm, and the temperature measurement distance can reach more than 10 meters. It can detect subtle changes in temperature in different parts of the equipment process, detect temperature and its changes in various parts of the equipment process, diagnose equipment problems, and provide reliable guarantee for preventing equipment accidents and hidden dangers. On the basis of on-site practice, the technical personnel and worker technicians of Gudong Oil Production Plant in Shengli Oilfield have successfully used it to find pipeline leakage points and discover electrical equipment abnormalities, bringing many conveniences to the on-site process and equipment management of oilfield development, greatly reducing workload and management difficulty.
For a long time, there has been a frequent occurrence of perforation in single well pipelines for polymer injection. Some of the puncture points are located at a depth of 30-100cm below the cement floor inside and outside the polymer injection station building. In order to repair the welding puncture point, it is first necessary to find the puncture point.
In general, the mixture of polymer mother liquor and sewage is transported to the wellhead in the polymer injection well pipeline, with a temperature of about 40 degree . Due to the varying degrees of compaction and density of underground cement and soil layers, as well as differences in pore size, the mixed liquid from the puncture point migrates along the point with the highest porosity, turning and extending, with a maximum transfer length of more than 10 meters. Finally, it overflows from the weakest point, which is the overflow point. During the transfer process of the mixed liquid, the temperature gradually decreases, i.e. the overflow point temperature is * low, while the puncture point temperature is the highest.
Therefore, in actual leak detection, as long as the handheld thermometer starts from the overflow point and moves along the path of temperature increase, as it approaches the puncture point, the thermometer displays a gradual increase in temperature until the highest temperature is reached. Once the highest temperature point is found, the puncture point is found. Multiple leak detection tests have proven that using a thermometer to find the puncture point is time-saving and labor-saving, with an accuracy of 100 percent . This method can greatly reduce the scope of smashing cement on the ground, reduce labor intensity and shutdown time of polymer injection wells, and improve work efficiency.
Since 2009, the above recommendations have been used to detect leaks 15 times, with a success rate of 100 percent . The average pipeline processing time has been shortened by 6 hours per well, the injection volume of polymer solution has been increased by 680 cubic meters, and the shutdown injection time has been reduced.
