Pipe section type crude oil on-line water content analyzer

Abstract

The utility model discloses a pipe section type crude oil on-line water content analyzer, which comprises a pipe section shell provided with a through hole penetrating left and right; a sensing area mounting hole is formed in the bottom of the pipe section shell; one end of the supporting column is fixed on the pipe section shell; the gauge outfit is fixed at the other end of the supporting column; the capacitive probe is provided with two electrode plates, the two electrode plates are fixed on a bottom plate at intervals, and the bottom plate seals the sensing area mounting hole, so that the two electrode plates are positioned at the bottom of the pipe section shell; one end of the wire conduit is electrically connected with the capacitive probe; and the other end of the wire conduit is electrically connected with the meter head. The utility model has the advantage that the moisture content can be quickly analyzed even if the flow is very small.

Description

Technical Field

[0001] The utility model relates to the field of online analyzers, in particular to a pipe section type online crude oil water content analyzer. Background Art

[0002] The water content of crude oil is a key data in oil production, transportation and oil product trading. Online measurement of the water content of oil wells is of great significance to the construction of digital oil fields, such as oil well water production, oil-producing layer, estimation of crude oil production, prediction of oil well development life, oil well production quality control, oil well status detection, and water injection operations. At present, there are two ways to monitor the water content of crude oil in oil fields: online and offline. The online method usually adopts pipe segment installation, such as Figure 1 As shown, the sensor probe 200 is integrated into the pipe section, and the sensor probe is located on the side of the pipe section, and then the entire pipe section is merged into the production pipeline, so that it can monitor the water content of crude oil in real time and provide data to guide production. However, the existing installation method and structure is to locate the sensor probe on the branch pipe on the side of the pipe section. The fluidity of crude oil on the branch pipe is weakened. In addition, the crude oil has more impurities, which is easy to scale and wax, and hang on the wall, thereby affecting the measurement accuracy of the sensor.

[0003] After searching, Chinese patent document CN215218829U discloses a crude oil water content analyzer that can be quickly disassembled and assembled. The shell is a three-way structure, which includes a vertical pipe section and a horizontal pipe section. A first flange is fixed on the probe, and a second flange is fixed on the upper end of the vertical pipe section. The first flange and the second flange are connected by bolts. The probe is located in the vertical pipe section, which is convenient for removing the probe from the shell. Moreover, the probe is located in this position and can directly contact the crude oil. Due to the fluidity of the crude oil itself, it is not easy to scale on the probe, so the influence of crude oil impurities on the measurement accuracy of the probe can be reduced; the guide component is located inside the three-way pipe fitting, which can prevent the crude oil from scaling on the guide plate, and further reduce the influence of crude oil impurities on the measurement accuracy of the probe. Even if it is used in crude oil that is prone to scaling, the structure is easy to disassemble and remove the dirt on the probe.

[0004] Chinese patent document CN101285819A discloses a pipe segment type automatic erasing water content analyzer, which has a support sleeve and a signal processing unit, a pipe segment is connected to the lower end of the support sleeve, a micro motor is arranged on the support sleeve, the micro motor is connected to the control unit, a reciprocating mechanism is arranged in the support sleeve, a probe and an erasing sleeve are arranged below the reciprocating mechanism, and the probe or the erasing sleeve is connected to the reciprocating mechanism. The special feature is that the reciprocating mechanism is composed of a nut housing installed on the micro motor shaft, a nut, a lead screw and a ball arranged in the nut housing, a limit adjustment sleeve arranged at the upper end of the lead screw and a joint body connected to the lower end of the lead screw. The advantages are: simple structure, easy installation and use, low manufacturing cost, reasonable installation position of each component, accurate measurement data, and reliable operation.

[0005] Chinese patent document CN212646693U discloses an online crude oil water content analyzer, which belongs to the field of crude oil detection technology. It includes a meter head, a wiring terminal is provided on the upper side of the meter head, a guide rod is connected to the data output shaft at the lower end of the meter head through a connector, a measuring probe is provided at the end of the guide rod, the guide rod is inserted into a sealing tube, the upper end of the sealing tube is fixed by a compression sleeve, the lower end of the sealing tube is connected to a ball valve through a flange and screws, the lower end of the ball valve is connected to a connecting pipe through a flange, the connecting pipe is connected to a crude oil pipeline, and the measuring probe is inserted into the crude oil pipeline. The online crude oil water content analyzer is easy to use and maintain.

[0006] However, conventional sensor probes are installed on the side of the pipe section, e.g. Figure 1 As shown in the prior art retrieved, such as the probes in the above-mentioned CN215218829U, CN101285819A and CN212646693U are all inserted from the top of the pipeline to the bottom. At present, no prior art has been found to set the probe at the bottom of the pipe section.

[0007] The inventors found that conventional sensor probes require liquid to completely cover the probes in order to measure the moisture content. However, placing the probes at the bottom of the pipe section and using capacitive probes to measure the moisture content has the advantage of being able to quickly measure the moisture content even with very little flow.

[0008] Thus the utility model is provided. Utility Model Content

[0009] In view of this, in order to solve the above technical problems, the purpose of the utility model is to provide a pipe-segment type crude oil online water content analyzer, which has the advantage of being able to quickly measure the water content even with a very small flow rate.

[0010] The technical solutions adopted are:

[0011] A pipe section type crude oil online water content analyzer, comprising:

[0012] The pipe segment housing has through holes extending left and right; and a sensing area mounting hole is provided at the bottom of the pipe segment housing;

[0013] A support column, one end of which is fixed to the pipe segment housing;

[0014] A meter head, which is fixed to the other end of the support column;

[0015] A capacitive probe having two electrode sheets, the two electrode sheets being fixed on a bottom plate at intervals, the bottom plate sealing the sensor area mounting hole so that the two electrode sheets are located at the bottom of the pipe section housing;

[0016] A wire tube, one end of which is electrically connected to the capacitive probe; and the other end of which is electrically connected to the meter head.

[0017] Furthermore, the meter head is installed with a display screen and a control circuit board, the control circuit board is integrated with an MCU and a wireless communication module, and the display screen, the wireless communication module and the conduit are electrically connected to the MCU respectively.

[0018] Furthermore, flanges are fixedly mounted on both ends of the pipe section shell.

[0019] Furthermore, a first cube protrusion extends from the bottom of the pipe section shell at the edge of the sensing area mounting hole, and the measuring hole extends toward the first cube protrusion to form a cube sensing area mounting hole. The bottom plate is provided with a second cube protrusion, and the second cube protrusion is provided with two spaced-apart combining holes, and two electrode sheets are respectively sealed and mounted on the two combining holes; the second cube protrusion can be inserted into the sensing area mounting hole with matching size.

[0020] Furthermore, a step is provided in the combining hole; and the electrode sheet is clamped on the step.

[0021] Furthermore, the electrode sheet is not higher than the surface of the inner wall of the through hole.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] Since the two electrode pieces of the capacitive probe are fixed on a bottom plate at intervals, the bottom plate seals the installation hole of the sensing area, so that the two electrode pieces are located at the bottom of the pipe section shell, so as to use the capacitance method to analyze the water content. The capacitive probe is installed at the bottom of the pipe section shell. In this way, even if the flow in the pipe section shell is very small, the two electrode pieces can still sense and detect, and send the change signal of the capacitance difference to the meter head, so as to quickly analyze the water content. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0025] Figure 1 It is a schematic diagram of the installation position structure of the sensor probe in the prior art.

[0026] Figure 2 It is a schematic diagram of the three-dimensional structure of a pipe segment shell.

[0027] Figure 3 It is a schematic diagram of a three-dimensional structure including a pipe segment shell, a support column and a flange.

[0028] Figure 4 It is a schematic diagram of the cross-sectional structure including the pipe segment shell, support column and flange.

[0029] Figure 5 A schematic diagram of the three-dimensional structure of the base plate.

[0030] Figure 6 A schematic diagram of the side structure of the base plate.

[0031] Figure 7 The utility model is a schematic diagram of the explosion structure of a pipe-segment type crude oil online water content analyzer.

[0032] Figure 8 The utility model is a three-dimensional structural schematic diagram of a pipe-segment type crude oil online water content analyzer.

[0033] Fig. 9 The utility model is a circuit block diagram of a pipe-section type crude oil online water content analyzer. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only partial embodiments of the utility model, not all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] See also Figure 2-Figure 9 As shown, a pipe section type online crude oil water content analyzer includes a pipe section shell 1, a support column 2, a meter head 3, a capacitive probe 4 and a wire tube 5.

[0036] The pipe segment housing 1 has a through hole 11 extending from left to right; and a sensing area mounting hole 12 is provided at the bottom of the pipe segment housing. As a specific embodiment, flanges 13 are fixedly mounted at both ends of the pipe segment housing 1. The flanges can be made of stainless steel, for example. The flanges are used to connect the pipe segment housing to the crude oil pipeline.

[0037] One end of the support column 2 is fixed on the pipe section housing 1. The support column can be solid or hollow. As a specific embodiment, the support column is hollow and has no wire inside. The wire is, for example, a signal wire or an electric wire. There is no wire inside, which is different from the prior art. Most of the prior art pipe section type crude oil online water content analyzers have the probe installed in the support column and extended or movably extended into the pipe section. For example, the prior art CN215218829U, CN101285819A and CN212646693U disclose.

[0038] The meter head 3 is fixed on the other end of the supporting column 2 .

[0039] The capacitive probe 4 has two electrode sheets 41, which are fixed on a bottom plate 6 at intervals. The bottom plate 6 seals the sensing area mounting hole 12, so that the two electrode sheets 41 are located at the bottom of the pipe section shell;

[0040] One end of the wire tube 5 is electrically connected to the capacitive probe 4; the other end of the wire tube 5 is electrically connected to the meter head 3. The wire tube is independent of the support column and is not arranged inside the support column. The wire tube can be a hose, and the length is sufficient as long as one end is connected to the capacitive probe and the other end is connected to the meter head.

[0041] As a specific implementation method, refer to Fig. 9 As shown, the meter head 3 is equipped with a display screen 31 and a control circuit board 32, and the control circuit board 32 is integrated with an MCU 33 and a wireless communication module 34. The display screen 31, the wireless communication module 34 and the conduit 5 are electrically connected to the MCU 33 respectively. Among them, the display screen is used to display the detected moisture content data. The wireless communication module can be used to wirelessly connect an external device or a control device, such as a mobile phone or a computer, so as to facilitate the wireless transmission of the moisture content data to the external device or the background control device. The conduit is connected to the MCU wire, that is, the capacitive probe 4 is electrically connected to the MCU 33 through the conduit 5. Specifically, the two electrode sheets 41 are electrically connected to the MCU 33 through the conduit 5.

[0042] As a specific embodiment, the bottom of the pipe section housing 1 extends a first cubic protrusion 14 at the edge of the sensing area mounting hole 12, and the sensing area mounting hole 12 extends toward the first cubic protrusion 14 to form a cubic sensing area mounting hole 12, and the bottom plate 6 is provided with a second cubic protrusion 61, and the second cubic protrusion 61 is provided with two spaced-apart combining holes 62, and the two electrode sheets 41 are respectively sealed and installed on the two combining holes 62; the second cubic protrusion 61 can be inserted into the sensing area mounting hole 12 with matching size. In this way, the two electrode sheets can be installed more firmly. The two electrode sheets are installed into the sensing area mounting hole through the two combining holes to form a sensing area.

[0043] As a specific implementation, a step 63 is provided in the coupling hole 62 ; the electrode sheet 41 is clamped on the step 63 .

[0044] As a specific implementation, the electrode sheet 41 is not higher than the surface of the inner wall of the through hole 11 .

[0045] The working principle of the pipe section type crude oil online water content analyzer is to use the capacitance principle to analyze the water content of crude oil. That is, based on the capacitance principle, the water content in crude oil is determined by detecting the capacitance difference between crude oil and water. When the water-containing crude oil flows through the pipe section shell, the capacitance difference between the crude oil and water between the two electrode sheets is different, so this capacitance difference can be used to generate a signal to send to the MCU to determine the water content in the crude oil.

[0046] During operation, since the two electrode sheets are fixed at the bottom of the pipe section shell, even if the liquid flow in the pipe section shell is very small, the two electrode sheets can still sense and detect, and send the capacitance difference change signal to the meter head, thereby quickly measuring the water content.

[0047] Low liquid flow means that the liquid only flows through the bottom of the pipe section shell. The liquid flow can be sensed as long as it covers the two electrode sheets at the bottom of the pipe section shell.

[0048] This pipe-type crude oil online water content analyzer analyzes the water content of crude oil based on the capacitance method. Two electrodes are spaced apart to form a capacitor, and are set at the bottom of the pipeline shell for sensing analysis. It can still accurately detect under low liquid volume conditions and has good adaptability under low liquid volume conditions.

[0049] The pipe segment type crude oil online water content analyzer can effectively and timely respond to water content changes. It can be directly connected to the straight segment pipeline and is suitable for online monitoring of thin oil wells, heavy oil wells, high liquid volume wells, low liquid volume wells, etc.

[0050] The series of detailed descriptions listed above are only specific descriptions of feasible embodiments of the present invention. They are not intended to limit the protection scope of the present invention. All equivalent embodiments or changes that do not deviate from the technical spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A pipe-type crude oil online water content analyzer, characterized in that: include: A pipe segment housing having through holes extending therethrough from left to right; A sensing area mounting hole is provided at the bottom of the pipe section housing; A support column, one end of which is fixed to the pipe segment housing; A meter head, which is fixed to the other end of the support column; A capacitive probe having two electrode sheets, the two electrode sheets being fixed on a bottom plate at intervals, the bottom plate sealing the sensor area mounting hole so that the two electrode sheets are located at the bottom of the pipe section housing; A wire tube, one end of which is electrically connected to the capacitive probe; The other end of the wire tube is electrically connected to the meter head.

2. The pipe segment type crude oil online water content analyzer according to claim 1, characterized in that: The meter head is equipped with a display screen and a control circuit board, the control circuit board is integrated with an MCU and a wireless communication module, and the display screen, the wireless communication module and the conduit are electrically connected to the MCU respectively.

3. The pipe segment type crude oil online water content analyzer according to claim 1, characterized in that: Flanges are fixedly mounted on both ends of the pipe section shell.

4. The pipe segment type crude oil online water content analyzer according to claim 1, characterized in that: A first cubic protrusion extends from the bottom of the pipe section shell at the edge of the sensing area mounting hole, and the sensing area mounting hole extends toward the first cubic protrusion to form a cube. The bottom plate is provided with a second cubic protrusion, and the second cubic protrusion is provided with two spaced-apart combining holes, and two electrode sheets are respectively sealed and mounted on the two combining holes; the second cubic protrusion can be inserted into the sensing area mounting hole with matching size.

5. The pipe segment type crude oil online water content analyzer according to claim 4 is characterized in that: A step is provided in the combining hole; the electrode sheet is clamped on the step.

6. The pipe segment type crude oil online water content analyzer according to claim 1, characterized in that: The electrode sheet is not higher than the surface of the inner wall of the through hole.

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