Advantages of drag reducer

With the deepening of research, drag reducer products are becoming more and more mature and have entered the stage of commercial application. Mainly manifested in: less addition, high drag reduction rate; It has shear resistance and has no obvious degradation during storage, transportation and use; There is no adverse effect on oil processing and oil quality; The injection equipment is simple, and the injection process is easy; China has the ability to produce drag reducer. Whether using drag reducer in new pipeline design or in existing pipeline operation, considerable economic and social benefits can be obtained. The advantages of applying drag reducer in oil pipeline are mainly reflected in the following aspects:

construction investment

An important basis for the design of new pipelines is the annual throughput of pipelines, but there are many uncertain factors affecting the annual throughput of pipelines. For example, it is impossible to accurately estimate oil reserves, and market conditions require changes in pipeline transportation and petroleum products. According to the relative economic data, these uncertain factors can leave a part of design margin and balance this part with drag reducer. Reducing the pipe diameter and the scale of pumping station construction can greatly save the construction investment of new pipelines. China's oil pipelines are all designed according to the annual throughput. The selected pipe diameter and wall thickness, pumping station and equipment are generally large and conservative, and have poor adaptability to the change of throughput. This not only leads to high investment, but also uneconomical operation.

Increase throughput

Especially in the neck section, the transportation capacity can be increased by adding or reducing inhibitors, so as to increase the transportation capacity of the whole pipeline and meet the requirements of multi-transportation and rapid transportation. The oil transportation plan can be flexibly adjusted to meet the market demand and create economic and social benefits to the maximum extent. Great changes have taken place in China's oilfield production. In order to increase the flexibility of pipeline transportation and adapt to the change of oilfield production, it is of great practical significance to apply the technology of adding and subtracting inhibitors. With the increase of oilfield production, pipelines need to be expanded in stages, which may sometimes cause great waste if they are put into production in a hurry. Taking the expansion of Dongying-Huangdao pipeline as an example, the planned output of the oilfield increased significantly at 1985, and the pipeline capacity was required to be 30%. Therefore, four additional pressurization stations were built, with an investment of 20 million yuan and a construction period of half a year. However, after the completion of the project, the oilfield output failed to meet expectations, and four pumping stations were idle. If drag reducer is selected to increase technical transition, investment can obviously be greatly saved. Similarly, the actual effect is not great by expanding the booster station first and then adding the auxiliary pipe. Obviously, in the pipeline oil transportation, it often happens that the oil field prospect is unknown and the output changes greatly. For example, it is technically feasible and economically reasonable to use drag reducer to solve the contradiction of large oil transportation in a short time.

reduce costs

Realize the maintenance and transformation of pump unit or pumping station under the condition of non-stop transmission, and reduce the maintenance and transformation cost. You can also reduce the number of people by increasing or decreasing the inhibitor, so that some pumping stations with difficult conditions and bad environment can be stopped. For example, the oil pipeline from Golmud to Lhasa crosses the Qinghai-Tibet Plateau with an average elevation of more than 3,000 m, and quite a few pumping stations are located at an altitude of more than 4,700 m, making it very difficult for people to survive. Drag reducer and automation technology can be used to close some intermediate pumping stations and reduce personnel. This will not only bring remarkable economic benefits, but also bring huge social benefits.

Improve safety and reliability

For example, the oil pipeline network in eastern China has been in operation for more than 30 years. Due to the serious corrosion of the internal and external walls of the pipeline, the pressure resistance of the pipeline is greatly reduced. It is particularly important to reduce the working pressure of the pipeline and improve the safety and reliability of the system.

Using drag reducer as a short-term emergency measure has great advantages. For pipelines that need to be transported for a long time, the economic benefit is not obvious because a large amount of drag reducer is needed. Adding drag reducer injection device in the oil transportation system improves the operation capacity and failure rate of the whole system, which is not conducive to daily operation and management. Therefore, drag reduction technology should be given priority and cannot be blindly applied. It can be predicted that in the near future, drag reducer, as a new transportation technology, will certainly create greater economic and social benefits for China's pipeline industry.