Crude oil on-line sampling device

Abstract

The invention discloses a crude oil on-line sampling device. The crude oil on-line sampling device comprises a sampling vertical pipe, wherein two ends of the sampling vertical pipe are connected with a crude oil pipeline through connecting flanges; the side wall of the sampling vertical pipe is connected with a liquid inlet branch pipe, the head of the liquid inlet branch pipe is inserted into the center of the sampling vertical pipe, and the tail portion of the liquid inlet branch pipe is connected with the side wall of a heat preservation pipe; the side wall of the heat preservation pipe is coated with a heat-insulating layer; the heat preservation pipe is sequentially provided with a cleaning component, an electric heater, a sampling component and a peristaltic pump in the vertical direction; and the sampling component comprises a sealing sleeve connected with the side wall of the heat preservation pipe, a sampling probe is nested in the sealing sleeve, the tail part of the sampling probe is nested in the inlet of a sample collection pipe, and the outlet of the sample collection pipe is led into an analysis instrument. According to the invention, independent branches flow out from a crude oil pipeline, and the temperature and pressure parameters of a sample under different external environments are consistent through the regulation of a pressure regulating valve and the electric heater, so that the result error of the original sample analysis is greatly reduced.

Description

technical field [0001] The invention specifically relates to a crude oil online sampling device. Background technique [0002] In the process of crude oil production, many production parameters need to be monitored in order to accurately evaluate the productivity of oil wells, monitor the working status, and exploit oil and gas resources reasonably and efficiently. Due to the influence of various factors such as the existence of formation water and water flooding production technology, the produced fluid of an oil well is a multiphase flow mixed fluid with three phases of oil, gas and water coexisting. It is an important parameter, and its measurement accuracy directly affects the analysis and evaluation of oil well water level, oil layer position, recovery degree and oil well development life. [0003] The existing mainstream methods for analyzing the water content of crude oil include ray method, capacitance method, chemical dehydration method, etc., but these methods for...

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Problems solved by technology

[0003] The existing mainstream methods for analyzing the water content of crude oil include ray method, capacitance method, chemical dehydration method, etc., but these methods of analyzing the water content of crude oil are all affected by the pressure and temperature of crude oil. Only when the temperature and pressure parameters of crude oil are affected by When controlling, the impact on the water content analysis of crude oil can be minimized, and the test results can be closest to the real

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