Application of Portable Water Cutting Technology in Oil and Gas Pipelines
With the rapid economic and social development, China's oil and gas pipeline construction has been growing at a rapid pace. The renovation and upgrading of oil and gas pipelines and emergency maintenance work are becoming more and more frequent, and the accompanying safety and environmental protection problems are becoming increasingly prominent. Frequent accidents and rising casualties have also become a shadow accompanying the rapid development of China's oil and gas pipeline industry. According to incomplete statistics, since 1995, more than 1,000 pipeline safety accidents of various types have occurred nationwide. Other data show that the number of casualties is rising. The rapid development of the city, the unreasonable industrial layout and government planning have further magnified this hidden danger. When the oil and gas pipelines are upgraded and repaired, they are usually constructed at the same time as production. The safety risks are high and the construction period is tight. It is very important to be able to complete the construction safely, quickly and effectively within the predetermined time. Oil and gas pipeline cutting requires sparkless cutting for safety reasons. Compared with traditional cutting methods, the use of portable water cutting technology can quickly cut the pipeline when there is flammable medium flowing in the pipeline, and the crack forming effect is good. If grinding is required, the subsequent welding work can be carried out directly. This makes portable water je technology develop rapidly and become more perfect.
1 Defects of traditional cutting
Due to the particularity of the petrochemical industry, the working environment and equipment require strict management and control, and the operating media of the equipment are all inflammable and explosive substances, so work safety has become the focus of attention. Especially in the process of equipment maintenance, installation and construction, the safety cannot be ignored. Using traditional cutting methods such as welding gas or plasma may cause the burning of combustible substances or cause explosions during the cutting process, resulting in casualties and immeasurable losses.
In order to ensure safe production, it is necessary to adopt a safe cutting technology that can produce no static electricity, no sparks, and no thermal deformation in the cutting of oil and gas pipelines. Portable water cutting technology meets the requirements of low temperature cutting, and is environmentally friendly, without the generation of harmful gases, ensuring the safety of construction operations.
2 Portable Waterjet Technology
Portable water cutting, designed according to the principle of water jet technology, uses "water" as the cutting medium, has unique cold cutting characteristics, and prevents the danger of high temperature and spark explosion. After testing, the equipment can cut and destroy dangerous objects such as aviation bombs, artillery shells, and petrochemical pipelines without any risk.
The portable water cutting technology adopts the method of pressurizing water and abrasive at the same time, and the pressurized water and abrasive are sprayed at the torch nozzle at the same time, which overcomes the problems of energy consumption and low water pressure utilization rate due to the siphon effect of large water jets, which is beneficial to The lower pressure can effectively complete the cutting operation. Compared with the working pressure of ordinary water jet, the pressure of portable low pressure water cutting is 30-50Mpa. Portable water cutting equipment is based on the design concept of safety, portability, simple operation, and flexible transportation, and has the characteristics of safety, environmental protection, portability and safety. It provides a new way for the cutting of pipelines and oil tanks in the petrochemical field.
3 Applications of Portable Water Cutting
In oilfield ground construction, non-spark cutters are usually used for demolition and cutting of oil (gas, sewage) pipelines, but pipeline cutters have large limitations and low cutting efficiency. Due to the high concentration of flammable and explosive media in oil and gas pipelines containing oil (gas, sewage), it is very dangerous to directly use flame cutting. Generally, the residual media in the container should be removed first, and the concentration of flammable media should be detected before starting fire. Using portable water cutting technology, the cutting operation can be directly carried out according to the construction requirements, which is safe and reliable. Since many links such as detection and discharge of combustible gas are omitted in the construction process, and the speed of portable water cutting is equivalent to that of flame cutting, the construction efficiency is effectively improved.
With the development of society, more and more times of oil and gas pipeline reconstruction and emergency maintenance, the construction intensity is increasing, the application of portable water cutting has solved the problems encountered in the oil and gas pipeline cutting operation to a certain extent, and effectively Ensure the safety of construction workers. Portable water jet cutting with its small size, light weight, simple and flexible operation, etc., is suitable for complex and changeable fire and explosion-proof job sites, solves various dangers brought by oil and gas pipelines in the construction process, reduces the occurrence of safety accidents, and saves money. Economic cost, has broad application prospects in the market, and is of great significance to pipe cutting operations.
