Online direct measurement device of wellhead crude oil water content on basis of radio frequency method

A technology of moisture content and radio frequency method, applied in the direction of using microwave to test moisture content, can solve the problems of high cost and easy wax deposition, and achieve the effect of solving wax deposition, reducing damage and reducing production input cost.

Inactive Publication Date: 2016-04-13
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problems of high cost of existing equipment and the problem that the probe is prone to wax formation when it is in contact with crude oil for a long time, and to provide and develop a method based on radio frequency, which is low in cost and has a full range, suitable for use at the wellhead of a single well in Changqing Oilfield, and can be online Device for accurate measurement of water content in crude oil

Method used

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  • Online direct measurement device of wellhead crude oil water content on basis of radio frequency method
  • Online direct measurement device of wellhead crude oil water content on basis of radio frequency method
  • Online direct measurement device of wellhead crude oil water content on basis of radio frequency method

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Embodiment 1

[0030] This embodiment provides a figure 1 The shown online direct measurement device for the water content of wellhead crude oil based on the radio frequency method includes a measuring sensor 1, an explosion-proof junction box 2 and an outdoor explosion-proof box 3, and the measuring sensor 1 includes a probe 4, a joint body 6, a measuring circuit board 7, a protective Tube 8, housing 9, docking body 10, compression stud 11 and signal line 12, the inside of the housing 9 is provided with a protective tube 8, the upper end of the housing 9 is connected to the docking body 10 through a screw, and the lower end of the housing 9 Welded with the joint body 6, the inside of the protection tube 8 is provided with a measurement circuit board 7, and the lower end of the protection tube 8 is connected to the joint body 6 through a threaded connection, the bottom of the joint body 6 is connected to the probe 4, and the probe 4 is connected to the signal line 12 terminal connection, the...

Embodiment 2

[0038] On the basis of embodiment 1, this embodiment provides a kind of image 3 As shown in the measurement sensor, the probe 4 is provided with a heating wire inside, and the upper part of the probe 4 is provided with a shield 5, and the shield 5 is connected to the joint body 6 through a screw connection, and the geometric shape of the probe 4 is streamlined, and the material is stainless steel , and add a 0.2mm thick ceramic material coating on the surface of the probe.

[0039] The sensor adopted in the present invention is a contact measurement, and the probe 4 is in contact with the measured medium, and the geometric shape of the probe 4 is set to be streamlined to ensure that it can fully contact the oil-water medium and improve the measurement accuracy. The probe 4 is embedded with a heating device, and The probe 4 is integrated package, which can heat the probe 4. The heating temperature can reach 60°C, which can effectively prevent the surface of the probe from waxi...

Embodiment 3

[0041] On the basis of embodiment 2, this embodiment provides a kind of image 3 As shown in the measurement sensor, an insulating sleeve is arranged on the inside of the joint body 6, and a locking nut is arranged inside the insulating sleeve. The probe 4 and the joint body 6 are connected by a locking nut, and the gap between the probe 4 and the joint body 6 is Provided with insulating pads. Both the insulating sleeve and the insulating pad can effectively prevent the short circuit of the circuit, and the probe 4 is connected to the joint body 6 through a lock nut, which prevents the probe from moving during the measurement process and affects the measurement accuracy.

[0042] In order to fasten the connection between the compression stud 11 and the docking body 10, further, a steel pad is provided at the joint between the side of the compression stud 11 and the docking body 10, and the bottom surface of the compression stud 11 is connected to the docking body 10. Rubber p...

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Abstract

The invention provides an online direct measurement device of wellhead crude oil water content on the basis of a radio frequency method. The online direct measurement device comprises a measuring sensor, an explosion-proof junction box, and an outdoor explosion-proof tank, wherein the measuring sensor comprises a probe, a joint body, a measurement circuit board, a protective pipe, a shell, a butting body, a pressing stud and a signal wire, the device also comprises a measuring circuit and an integrated data processing circuit, the device provided by the invention solves the problem that real-time on-line monitoring on water content of a Changqing oil field single well wellhead can not be realized at present, and overcomes the problems that the existing device is high in cost, wax is easily deposited due to the fact that the probe contacts with crude oil for a long time, and a data processing method of one-to-many greatly reduces the production input cost.

Description

technical field [0001] The invention relates to the research field of measuring instrument technology in the petroleum industry, in particular to an on-line direct measuring device for the water content of wellhead crude oil based on a radio frequency method. Background technique [0002] The water content of crude oil is not only an important reservoir data of oil wells, but also an important production parameter. It is very important for determining water and oil production layers, estimating production and predicting the development life of oil wells, as well as oil field production quality control, oil well status detection, cost reduction and oil recovery management automation. It has important significance and practical value. [0003] At present, there are mainly two methods for measuring the water content of crude oil in domestic oilfields, namely manual sampling method and online measurement method. The manual sampling measurement method is divided into distillatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N22/04
CPCG01N22/04
Inventor 于洋魏小林罗聪英赵晓龙李丽吴利利
Owner PETROCHINA CO LTD
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