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Device and method for measuring pour point of crude oil and petroleum products under different pressures

A technology for petroleum products and measuring devices, applied in the investigation stage/state change and other directions, can solve the problems of difficulty in measuring the pour point of heavy oil and heavy oil, limited test pressure, and limited application range.

Active Publication Date: 2020-01-17
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the non-tilted tube method can also be used to measure the pour point, but the scope of application is limited
The measurement objects of these methods are generally ordinary crude oil and petroleum products with low pour points, and the test pressure is limited to normal pressure. The pour point under different external environmental pressures, and the measurement method is single, the operation is complicated, the speed is slow, and the measurement error is large

Method used

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  • Device and method for measuring pour point of crude oil and petroleum products under different pressures
  • Device and method for measuring pour point of crude oil and petroleum products under different pressures
  • Device and method for measuring pour point of crude oil and petroleum products under different pressures

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Effect test

Embodiment 1

[0071] Such as Figure 1-5 As shown, according to the measuring device of the pour point of crude oil and petroleum products under different pressures according to the present invention, it comprises a nitrogen cylinder 1, a pipeline 2, and two brackets 3, and the pipeline 2 is connected with the nitrogen cylinder 1, and the bracket 3 Support the pipeline 2; the measuring device also includes a double-chamber pressure system 4, the double-chamber pressure system 4 is arranged between two supports 3, and high-pressure hoses 5 are respectively arranged on both sides of the double-chamber pressure system 4, The high-pressure hose 5 is connected to the pipeline 2 through a rotary joint 6 . The pipeline 2 is equipped with a pressure coarse regulator 7, a valve III8, a nitrogen filter 9, a pressure relief valve I10, a valve IV11, a safety valve 12, and a pressure relief valve II13.

[0072] The double-chamber pressure system 4 includes a workbench 401, a rotary hinge 402, a tempera...

Embodiment 2

[0084] According to an embodiment of the automatic pneumatic measurement method of the pour point of crude oil and petroleum products under different pressures, the measuring device in Embodiment 1 is adopted, which comprises the following steps in sequence:

[0085] Step 1: Connect the measuring device, adjust the temperature regulator to a vertical state; open the test cylinder cover, and put the preheated crude oil or petroleum products into the test cylinder to the position of the liquid level scale line;

[0086] Step 2: Close the pressure relief valve Ⅰ, open the pressure relief valve Ⅱ, pressure trimmer Ⅰ, pressure trimmer Ⅱ and all valves installed on the pipeline; open the nitrogen cylinder, adjust the pressure coarse regulator to control the pressure value not greater than 2 atmospheres , Displace the air in the device, the displacement time is 5min; close the pressure relief valve II, observe the pressure readings of the pressure indicator gauge I and the pressure in...

Embodiment 3

[0107] According to an embodiment of the oblique method for measuring the pour point of crude oil and petroleum products under different pressures according to the present invention, the measuring device in Embodiment 1 is adopted, which comprises the following steps in sequence:

[0108] Step 1: Connect the measuring device, adjust the temperature regulator to a vertical state; open the test cylinder cover, and put the preheated crude oil or petroleum products into the test cylinder to the position of the liquid level scale line;

[0109] Step 2: Close the pressure relief valve Ⅰ, open the pressure relief valve Ⅱ, pressure trimmer Ⅰ, pressure trimmer Ⅱ and all valves installed on the pipeline; open the nitrogen cylinder, adjust the pressure coarse regulator to control the pressure value not greater than 2 atmospheres , Displace the air in the device, the displacement time is 5min; close the pressure relief valve II, observe the pressure readings of the pressure indicator gauge...

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Abstract

The invention relates to a measurement device for pour points of crude oil and petroleum products at different pressures. The device comprises a nitrogen bottle, a pipeline, two brackets and a dual-cavity pressure system, wherein the dual-cavity pressure system is arranged between the two brackets. The invention further relates to a measurement method. The method comprises the following steps: 1, regulating a pressure trimmer I to enable pressures in both inner and outer pressure cavities of a test cylinder to be P; regulating a pressure trimmer II to enable the pressure in the inner pressure cavity to be decreased by 1 to 2; regulating a temperature regulator to reduce temperature by 0.1 to 2 DEG C at each time, observing whether a reading on a pressure sensor changes or not, and in case of any change, indicating that a crude oil or petroleum product does not reach the pour point at the pressure P, or in case of no change, indicating that the crude oil or petroleum product reaches the pour point at the pressure P. The measurement device and the measurement method can test the pour points of thickened oil and super heavy oil, and can also measure the pour points of different crude oil and petroleum products at different pressures.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field development and oil and gas storage and transportation engineering, and specifically relates to a measuring device and method for the pour point of crude oil and petroleum products under different pressures. oil and heavy oil. Background technique [0002] Pour point refers to the minimum temperature at which crude oil and petroleum product samples can maintain fluidity under certain conditions. It is an index commonly used in the world to evaluate the fluidity of crude oil in porous media of reservoirs and petroleum products in transportation pipelines. At present, the usual method for testing the pour point of crude oil and petroleum products is the inclined test tube method. First, the sample is preheated by heating in a water bath, and then the sample is put into the test tube and reaches the liquid level scale line. Cool the sample in the same way and observe its fluidity by tiltin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N25/04
CPCG01N25/04
Inventor 林伯韬高彦芳金衍陈勉侯冰
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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