Wax deposition rate measuring device for crude oil

Abstract

The invention provides a stress control type crude oil wax deposition device. The device comprises a wax deposition cylinder, a sample cylinder, a low-resistance rotating mechanism, a high-speed rotating mechanism, a constant-temperature oil bath, a lifting mechanism, a constant-temperature water bath, a measuring system, an electric control system and a data acquisition and processing system, the temperature control is performed on crude oil and the wall surface of the wax deposition cylinder through the constant-temperature oil bath and the constant-temperature water bath to achieve the required temperature; the sample cylinder can rotate through a computer data acquisition system, the low-resistance rotating mechanism and the high-speed rotating mechanism, and the rotational speed can be set; and the lifting of the wax deposition cylinder can be regulated through the lifting mechanism. Crude oil wax deposition regular experiments under different oil temperatures, wall temperatures and rotational speeds can be performed by changing the temperature of the constant-temperature oil bath and the constant-temperature water bath, as well as the rotational speed of the sample cylinder.

Description

technical field [0001] The invention relates to a crude oil wax deposition measuring device, which is especially suitable for measuring the wax deposition rate of high waxy crude oil. Background technique [0002] Pipeline transportation of crude oil is currently a commonly used method of oil transportation. It has the advantages of less land occupation, large transportation volume, less energy consumption, low freight, airtight operation, high safety, and convenient management and centralized control. During crude oil pipeline transportation, when the pipe wall temperature is lower than the wax precipitation point and lower than the oil flow temperature, the wax in the crude oil crystallizes out and deposits on the pipe wall together with other components in the crude oil. This phenomenon is called Wax deposition in crude oil pipelines. [0003] The crude oil produced in most oilfields in my country is waxy crude oil, and pipeline transportation of waxy crude oil will inev...

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Problems solved by technology

However, it is troublesome to measure the thickness of wax deposition in this kind of loop, because the viscosity of crude oil changes with the prolongation of the measurement time, it is difficult to determine whether the increase in pressure drop is caused by the smaller diameter of the pipe or the change in viscosity. At the same time, the oil consumption of the loop is more duration

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