The Repair Technology of Oil and Gas Pipeline Accident

Oil and gas pipeline accidents have uncontrollability, there are several serious damages after a leakage: fire and explosion、gas poisoning and environmental pollution. As much as possible to reduce the hazardous of  leakage, this study describes technology of holing and plugging on non-stop pipeline with pressure, focuses on the welding tee, opening, plugging, under plugs, corrosion and other key aspects. It is found that opening rigs, plugging rig and under blocking device are developing toward large-caliber and automatic. This paper also review the progress and benefits of inner tube intelligent repair technology. Discuss the development direction of  repair technology and equipment in the future.