Pressure-preserved hole cutting is a safe, environmentally friendly, economical, and efficient in-service pipeline maintenance and emergency repair technology, suitable for normal maintenance and modification of various medium pipelines such as refined oil and chemical media, as well as emergency repairs in case of sudden accidents (such as pressure-preserved repairs, replacement of corroded pipeline sections, installation of equipment, and distribution transformation, etc.).

And this is a method for creating interfaces on pipes and containers, with the pipes and containers under pressure or in use during the drilling process. Additional branch pipes are added for material input/output, and temperature probe monitoring points are set to provide connection points for equipment (blocking equipment). Drilling does not require shutdown, thus it does not affect production or material supply. Petrochemical industry: hydrocarbons, heavy and light oils, diesel, crude oil, engine oil, flammable and explosive toxic gases, and a variety of chemical products.