Shaanxi Provincial Natural Gas Co., Ltd.

The high-consequence section mainly passes through the densely populated area or the special area, once the leakage occurs, it will cause the extremely bad influence even the serious consequence to the pipeline peripheral public and the environment.Therefore, as an important part of pipeline operation and safety management in high consequence area, it is necessary to establish an omni-directional, multi-angle, real-time and intelligent surveillance system, to solve the damage of pipelines in high consequence areas caused by the third party damage and illegal occupation and other reasons, to give early warning to the third party damage and illegal occupation and to push the alarm information to the dispatching center or the mobile workbench in real time, improve the alarm accuracy, reduce the probability of safety accidents, improve management efficiency.

The experiment and study on gas phase erosion wear of common downhole string material HP13Cr is performed through the self-design.Mainly by contrast tests of different sand contents and different flushing velocities, the erosion wear resistance of HP13Cr is examinedIt is found that when the sand content increases, the erosion wear becomes small instead; when the flushing speed reaches a certain value, the erosion wear will increase suddenly, thus it can prove that there is a critical value to affect the erosion wear velocity.