Countercurrent high-pressure-injection emulsion breaker filling device

Abstract

The invention relates to a countercurrent high-pressure-injection emulsion breaker filling device. The countercurrent high-pressure-injection emulsion breaker filling device comprises a storage tank (1), a feeding port (2), an air outlet hole (3), a measuring pump (4), a filling pipe (5) and a main pipeline (7). The countercurrent high-pressure-injection emulsion breaker filling device is simple in structure, reasonable in design and convenient to operate. When an emulsion breaker is filled in a countercurrent high-pressure injection way, the defects that the emulsion breaking time is short and the mixing is non-uniform can be overcome, and the emulsion breaking effect can be improved; and drastic turbulent flow can ensure that the emulsion breaker is uniformly mixed with crude oil emulsion, so that the emulsion breaker can rapidly reach an oil-water interface, and the stability of the emulsion can be broken.

Description

technical field [0001] The invention relates to a countercurrent high-pressure injection demulsifier filling device. Background technique [0002] At present, the commonly used demulsifier filling methods in oilfields include: drip injection process, injection injection process, etc. The filling point of these traditional filling processes is mostly set at the tee position of the pipeline, and some are even injected directly from the pressure gauge interface. The common feature of these injection methods is that the demulsifier injected into the pipeline flows along with the crude oil emulsion. At present, most domestic crude oil has the characteristics of high viscosity and high density, and the flow in the pipeline is laminar flow, which causes the injection to break. It is very difficult to mix the emulsion and the crude oil emulsion evenly. If there is no vigorous stirring or pump and other equipment shearing process after the filling process, the demulsifier is difficul...

AI Technical Summary

Problems solved by technology

Mainly by increasing the mixing distance to improve the mixing effect, oil samples with high viscosity and high density heavy oil are mostly distributed in laminar flow in the pipeline, and the mixing effect of the demulsifier and emulsion added in this way is not ideal

[0006] (2) Add demulsifier before lifting the pump. This method mainly promotes the mixing of demulsifier and emulsion through the high-speed shear of the pump. Since the demulsifier injected in the downstream way before the pump is mainly distributed in the filling position of the pipeline On one side, even with the shear of the pump, it is difficult to ensure that it is evenly mixed with the emulsion

At the same time, demulsifiers are generally high molecular polymers, with complex branch structures and many branch chains. Excessive pump shear rate may cause damage to the molecular structure of the demulsifier, thereby affecting the demulsification effect.

[0007] At present, it is difficult to ensure the uniform mixing of demulsifier and emulsion with the commonly used demulsifier injection method. At the same time, the most commonly used method of "adding agent at the wellhead and demulsifying in the pipe" requires a set of demulsifier injection device for each oil well, and for It is not suitable for small-production oil fields that use trucks to pull oil, and has certain limitations, and the cost of filling is high

[0008] Adding demulsifier before the pump is mainly used in occasions where pressurization is required before dehydration, otherwise pumps and other equipment need to be added to the process, which is neither economical nor guaranteed to improve the demulsification effect

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