Drag reducer, and preparation method and application thereof

Abstract

The invention provides a drag reducer, and a preparation method and an application thereof. The drag reducer has a high drag reduction efficiency; the carrier component of the drag reducer can effectively avoid the phenomena of breakage and the like of the macromolecular chain of an alpha-olefin polymer in the use process; and glyceryl trioleate and glyceryl trilinoleate also added to the drag reducer as carriers can assist in achieving the drag reduction effect, and the carriers also avoid the phenomena of layering or caking of the drag reducer in the storage process, so the blocking phenomenon is avoided. The drag reducer is a green and environmentally-friendly drag reducer, and the added carrier components are mild reagents, so compared with other drag reducers, the prepared drag reducer has no pungent smell, and is popular with operators. Moreover, the drag reducer has a wide application range, is suitable for crude oils and mixed crude oils with various densities, and is also suitable for product oils with high requirements for additives.

Description

technical field [0001] The invention belongs to the technical field of crude oil or refined oil additives, and in particular relates to a drag reducer suitable for crude oil or refined oil system and its preparation method and application. Background technique [0002] At present, people's oil exploration has entered a golden age, and the normal operation of many fields related to life is inseparable from the supply of crude oil or product oil, but the areas that can produce these crude oil or product oil are often located in remote areas. For crude oil Or the long-distance pipeline transportation of refined oil has become an indispensable link in its development process. Long-distance transportation has led to the emergence of drag reducers, which are chemical agents used to reduce fluid flow resistance, generally a long-chain polymer. After the drag reducer is added to the pipeline, the drag reducer is uniformly dispersed in the fluid in a continuous phase, forming an ela...

AI Technical Summary

Problems solved by technology

However, to achieve drag reduction, the surfactant content must reach a critical concentration, and the dosage is relatively large

In addition, the surfactant must be mixed evenly in the fluid to achieve a good drag reduction effect. This is another problem with the addition method for crude oil pipeline transportation, which is very uneconomical

[0006] At present, drag reducer products are basically a suspension of high-grade α-olefin polymer powder particles dispersed in a carrier solution, but it has disadvantages such as poor dispersion, poor stability, and easy delamination, and even clusters of drag-reducing polymer particles , agglomeration, which brings a lot of inconvenience to the field application of drag reducer

The current solution is often to add functional additives such as dispersants, emulsifiers, viscosity modifiers, and scale inhibitors to the system. The introduction of these additives can change the interface properties between the surface of α-olefin polymer powder particles and the carrier, and increase its The force of action with the carrier solution, that is, to slow down the sedimentation and delamination of the α-olefin polymer powder particles and the carrier solution; so that a more stable drag reducer can be obtained, and the commonly used dispersant is stearate (such as magnesium salt , sodium salt, calcium salt), although its introduction can solve the dispersibility problem of drag reducer, but it introduces metal ions or other substances into the original or refined oil, which is not conducive to its subsequent application or has adverse effects

Images