[History of Haichuan Pipeline] On 20210526, the newly built crude oil pipeline in Puluo used a self-developed self-crawling internal detector to facilitate oil and gas pipeline inspection

This self-crawling internal detector was specially developed by pipeline inspection technicians for newly built pipelines. It solves the problems of new pipelines that were powered by water injection or compressed air by air compressors in the past, resulting in high detection risks, high costs, long construction periods, complex processes, and difficult power sources. Compared with the detectors commonly used in pipeline inspection centers that are powered by crude oil flow, the self-crawling in-line detector uses a built-in battery as the driving force for situations where there is no driving medium in the pipeline before production, and can automatically travel in the pipeline and complete the inspection operation without external force. The detector is also equipped with an intelligent power management system and a travel control system, which can reasonably allocate power control methods according to the operating status of the detector to ensure high-speed and stable operation in straight pipelines. ； Control the detector to decelerate when going uphill, and increase the instantaneous power to increase the climbing ability. ； When going downhill, the electric motor switches to the power generation state, uses the downhill power to charge the battery, and functions as an electric brake in the power generation state to ensure constant speed operation when going downhill. The inspectors also conducted multiple verifications of the detector's climbing ability, endurance power and waterproof capabilities to cope with the various situations that may occur in large-diameter, long-distance newly built pipelines without driving media. After testing, the detector has the maximum 90-degree vertical climbing and downhill walking capabilities, and can detect for more than 50 hours and over 200 kilometers at a time. In addition, it can also detect geometric deformation and carry a self-illuminating and visual recording system, which can not only record all deformation data during travel, but also collect all visual information inside the pipeline. It is also equipped with an inertial navigation system, which can use inertial devices, high-precision ground reference points, and satellite positioning system coordinates to map the three-dimensional relative position coordinates of the pipeline while the detector is traveling, and accurately depict the three-dimensional trend of the pipeline centerline. According to reports, the diameter of the Ripu-Luo crude oil pipeline is φ762, and the total length of the Xinxiang-Puyang section of the internal inspection pipeline completed this time is 150km. This self-crawling internal inspection is the first part of the internal inspection before the Ripu-Luo Pipeline is put into operation. The self-crawling detector was sent from Xinxiang Station and arrived at Puyang Station after running smoothly for 36 hours. It has been verified that the self-crawling detector runs smoothly, and the speed is stable at about 4.2km/h during the entire operation, without stagnation or speed instability in the middle.

Were they imported before? ? ?