During the reconstruction and upgrading of oil and gas pipelines, rescue and maintenance, the safety risk is high and the construction period is tight. It is very important to be able to complete the construction safely, quickly, and effectively within the scheduled time. Oil and gas pipeline cutting needs to use sparkless cutting because of safety considerations. Compared with traditional cutting methods, the use of portable water cutting technology can quickly cut the pipeline when there is a combustible medium in the pipeline. You need to polish to do subsequent welding work directly. This has made portable waterjet cutting technology rapidly developing and increasingly perfect.

1. The defects of traditional cutting

Due to the particularity of the petrochemical industry, the working environment and equipment need to be strictly managed and controlled. The equipment operating medium is flammable and explosive substances. Therefore, work safety has become the biggest focus of attention. Especially the safety in equipment maintenance and installation construction cannot be ignored. Using traditional cutting methods such as welding or plasma may cause combustion or explosions during cutting, causing casualties and inestimable losses.

In order to ensure safety production, a safety cutting technology that can be produced without static, sparkless, and heat deformation of non -static electricity in oil and gas pipelines must be adopted. Portable water cutting technology realizes the requirements of low temperature cutting, and is environmentally friendly, no harmful gases, and ensure the safety of construction operations.

2 Portable waterjet cutting technology

Portable waterjet cutting is designed according to the principle of water shooting technology. It uses "water" as the cutting medium, which has a unique cold cutting characteristics, eliminating the risk of high temperature and spark explosion. After experimenting, the device implemented cutting and destroying the implementation of dangerous objects such as aviation, artillery shells, and petrochemical pipelines.

Portable waterjet cutting technology uses water and abrasives at the same time. Lower pressure effectively completes cutting operations. Compared with the working pressure of ordinary waterjet, the pressure of portable low -pressure water cutting is 30-50MPa. Portable waterjet cutting equipment is based on the characteristics of safety, portable, simple operation, and flexible transportation, and has the characteristics of safety, environmental protection, portable, and efficient. Provide a new way for pipelines and oil tank cutting in the petrochemical field.

3 Application of portable water jet cutting

In the construction of oilfield grounds, the removal and cutting of oil (gas and sewage) pipelines usually use sparkless cutter, but the limitation of the pipeline cutter is large and the cutting efficiency is low. Because the flammable and explosive concentration of oil and gas pipelines containing oil (gas and sewage) is high, it is very dangerous to use flame cutting directly. Generally, the residual media in the container must be removed. The combustible concentration must be detected before fire. Portable water jet cutting technology can be used directly according to the construction requirements, which can be directly cut off, which is safe and reliable. Due to many links such as the detection and discharge of gas during the construction process, and the portable water jet cutting speed is equal to the flame cutting speed, the construction efficiency is effectively improved.

With the development of society, the number of oil and gas pipeline transformation and upgrading, rescue and maintenance is increasing, and the construction intensity is getting larger and larger. Ensure the safety of the construction staff. Portable waterjet cutting machine is based on its small, lightweight, simple and flexible operation, etc., and is suitable for complex and changeable fireproof and explosion-proof operations. It solves the various hazards brought by the oil and gas pipeline during the construction process, reduced the occurrence of safety accidents. Economic costs have broad application prospects in the market and have important significance for pipeline cutting operations.