Double-pipe-section automatic switching high-precision wellhead crude oil water content analyzer

Abstract

The utility model belongs to the technical field of water content analyzers, and particularly relates to a double-pipe-section automatic switching high-precision wellhead crude oil water content analyzer which comprises a detection pipeline, a liquid inlet pipe is fixedly connected to the side wall of the detection pipeline, an electromagnetic valve is installed on the liquid inlet pipe, a detection cylinder is fixedly connected to the surface of the liquid inlet pipe, and a water outlet pipe is installed on the detection cylinder. A detection assembly is installed in the detection cylinder, the detection assembly comprises an I-shaped sealing piece and a first electric push rod, and a circulation channel is formed in the center of the sealing piece; crude oil enters the lower cavity by opening the protruding layer, the height of the liquid level of the crude oil in the lower cavity is detected through the liquid level sensor, the crude oil is heated from the inside by operating the heater, after being heated, the crude oil is detected through the measuring probe, and the measuring probe moves up and down and then penetrates through the cleaning hole. And impurities adhered to the surface of the measuring probe are scraped off through the scraping plate, so that automatic cleaning is realized, and the wax hanging phenomenon is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of water content analyzers, in particular to a high-precision wellhead crude oil water content analyzer with automatic switching of double pipe sections. Background Art

[0002] Measuring the water content of crude oil is crucial for monitoring oil well production dynamics, optimizing reservoir production parameters, estimating crude oil production, achieving pressure transmission of crude oil production, improving oilfield recovery, and predicting the development life of oil wells. Currently, testing the water content of crude oil typically involves adding a section of pipe to the crude oil pipeline. A three-way ball valve switches the existing pipeline, using the additional section as the testing line. Multiple capacitive measurement probes are placed in this testing line to measure the water content of the crude oil. Heating the crude oil during the testing process further facilitates oil-water separation, enabling faster and more accurate water content testing.

[0003] Existing heating methods typically heat the outer wall of the detection pipeline, which conducts heat through the outer wall to heat the crude oil inside the pipeline, promoting oil-water separation. However, the disadvantage of this structure is that the heated outer wall of the pipeline easily causes impurities to adhere to the inside of the pipeline.

[0004] An existing Chinese patent with the announcement number CN211477819U discloses a crude oil water content measuring device, which relates to the field of detection equipment. The technical solution is as follows: it includes a main oil inlet pipe, a detection passage, a main passage and a main oil outlet pipe. The main oil inlet pipe and the main oil outlet pipe are respectively located at the two ends of the detection passage and the main passage. The main oil inlet pipe, the main oil outlet pipe and the connection between the detection passage and the main passage are respectively connected by a three-way ball valve. A measuring probe is arranged in the detection passage, and it also includes a heating assembly for heating the crude oil in the detection passage. The detection passage includes a vertically arranged detection tube. The upper and lower parts of the detection tube are respectively connected to the main oil inlet pipe and the main oil outlet pipe through a three-way ball valve to form a crude oil passage.

[0005] In view of the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: the detection tube of the device forms a crude oil passage with the main oil inlet pipe and the main oil outlet pipe, so that the measuring probe will be in contact with the crude oil for a long time during use, resulting in wax sticking, which affects the detection accuracy and needs to be improved; therefore, to address the above problems, a high-precision wellhead crude oil water content analyzer with automatic switching of dual pipe sections is proposed. Utility Model Content

[0006] In order to make up for the deficiencies of the prior art and solve the above-mentioned technical problems, the utility model proposes a high-precision wellhead crude oil water content analyzer with automatic switching of dual pipe sections.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: the high-precision wellhead crude oil water content analyzer with dual-section automatic switching described in the present invention comprises a detection pipeline, a liquid inlet pipe is fixedly connected to the side wall of the detection pipeline, and a solenoid valve is installed on the liquid inlet pipe, a detection cylinder is fixedly connected to the surface of the liquid inlet pipe, a detection assembly is installed inside the detection cylinder, the detection assembly comprises an I-shaped sealing member and an electric push rod, a flow channel is opened at the center of the sealing member, the electric push rod is fixedly installed on the top of the detection cylinder, and the electric push rod is fixedly installed on the top of the detection cylinder. The driving end is fixedly connected to the seal, and a measuring probe and a heater are fixedly connected above the seal to connect the detection pipeline to the crude oil pipeline. Initially, the bottom end of the seal is pressed against the raised layer for sealing. During detection, the electric push rod extends to lower the seal, thereby opening the raised layer to allow the crude oil to enter the lower chamber. The crude oil level inside the lower chamber is detected by the liquid level sensor. When the liquid level is about two-thirds of the height of the lower chamber, the solenoid valve is controlled to close, and the heater is operated to heat the crude oil from the inside. After heating, detection is carried out through the measuring probe.

[0008] Preferably, sealing rings are fixedly connected to the upper and lower parts of the sealing member respectively, and the sealing rings improve the sealing effect when the sealing member contacts the raised layer.

[0009] Preferably, a piston ring is installed inside the circulation channel, and the piston ring is fixedly connected to the bottom end of the liquid inlet pipe.

[0010] Preferably, a liquid level sensor is fixedly connected below the sealing member, and the liquid level sensor is electrically connected to the solenoid valve.

[0011] Preferably, an annular raised layer is installed inside the detection cylinder, and the raised layer divides the interior of the detection cylinder into an upper chamber and a lower chamber.

[0012] Preferably, a scraper is fixedly connected to the inside of the raised layer, and a cleaning hole is opened on the surface of the scraper, and the cleaning hole is located directly below the measuring probe. After the measuring probe moves up and down, it passes through the cleaning hole, and then the scraper scrapes off the impurities adhered to the surface of the measuring probe, thereby realizing automatic cleaning and avoiding the occurrence of wax hanging phenomenon.

[0013] Preferably, the diameter of the cleaning hole is the same as the diameter of the measuring probe.

[0014] Preferably, the bottom of the detection cylinder is fixedly connected to an electric push rod 2, and the driving end of the electric push rod 2 is fixedly connected to a piston block. After the detection is completed, the electric push rod 1 descends again, so that the upper end of the seal rests against the raised layer to seal the upper chamber, thereby keeping the measuring probe in the upper chamber without contacting the crude oil when idle. The solenoid valve is opened and the electric push rod 2 is operated, and the piston block is driven to rise by the electric push rod 2 to push the crude oil in the lower chamber out.

[0015] The utility model is beneficial in that:

[0016] 1. The utility model opens the raised layer to allow crude oil to enter the interior of the lower chamber, detects the crude oil level inside the lower chamber through a liquid level sensor, operates the heater to heat the crude oil from the inside, and after heating, detects it through a measuring probe. The measuring probe moves up and down and passes through the cleaning hole, and then the scraper scrapes away impurities adhering to the surface of the measuring probe, thereby achieving automatic cleaning and avoiding the occurrence of wax hanging phenomenon.

[0017] 2. In the present invention, the electric push rod is lowered again, so that the upper end of the seal abuts against the raised layer to seal the upper chamber, thereby keeping the measuring probe in the upper chamber without contacting the crude oil when idle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a cross-sectional view of the detection tube and the raised layer of the utility model;

[0021] Figure 3 This is a schematic diagram of the detection component structure of the utility model;

[0022] Figure 4 This is a cross-sectional view of the sealing element of the present invention;

[0023] Figure 5 For this utility model Figure 2 Schematic diagram of the A structure.

[0024] In the figure: 1. Detection pipeline; 2. Liquid inlet pipe; 3. Detection cylinder; 4. Detection assembly; 41. Seal; 42. Flow channel; 43. Electric push rod 1; 44. Measuring probe; 45. Heater; 46. Sealing ring; 5. Piston ring; 6. Liquid level sensor; 7. Raised layer; 8. Scraper; 9. Electric push rod 2; 10. Piston block. DETAILED DESCRIPTION

[0025] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Example 1: Please refer to Figure 1-4 As shown, a high-precision wellhead crude oil water content analyzer with automatic switching of two pipe sections includes a detection pipe 1, a liquid inlet pipe 2 is fixedly connected to the side wall of the detection pipe 1, and a solenoid valve is installed on the liquid inlet pipe 2, a detection cylinder 3 is fixedly connected to the surface of the liquid inlet pipe 2, and a detection assembly 4 is installed inside the detection cylinder 3. The detection assembly 4 includes an I-shaped seal 41 and an electric push rod 43. A flow channel 42 is opened at the center of the seal 41. The electric push rod 43 is fixedly installed on the top of the detection cylinder 3, and the driving end of the electric push rod 43 is fixedly connected to the seal 41. The seal 41 A measuring probe 44 and a heater 45 are fixedly connected above the detection pipe 1 to connect the crude oil pipeline. Initially, the bottom end of the seal 41 is pressed against the raised layer 7 for sealing. During detection, the electric push rod 43 extends to lower the seal 41, thereby opening the raised layer 7 to allow the crude oil to enter the lower chamber. The crude oil level inside the lower chamber is detected by the liquid level sensor 6. When the liquid level is about two-thirds of the height of the lower chamber, the solenoid valve is controlled to close and the heater 45 is operated to heat the crude oil from the inside. After heating, detection is carried out through the measuring probe 44.

[0027] Sealing rings 46 are fixedly connected to the upper and lower parts of the sealing member 41 , respectively. The sealing rings 46 improve the sealing effect when the sealing member 41 contacts the raised layer 7 .

[0028] A piston ring 5 is installed inside the circulation channel 42 , and the piston ring 5 is fixedly connected to the bottom end of the liquid inlet pipe 2 .

[0029] A liquid level sensor 6 is fixedly connected below the sealing member 41 , and the liquid level sensor 6 is electrically connected to the solenoid valve.

[0030] An annular raised layer 7 is installed inside the detection cylinder 3 , and the raised layer 7 divides the interior of the detection cylinder 3 into an upper chamber and a lower chamber.

[0031] The bottom of the detection cylinder 3 is fixedly connected to the electric push rod 2 9, and the driving end of the electric push rod 2 9 is fixedly connected to the piston block 10. After the detection is completed, the electric push rod 1 43 descends again, so that the upper end of the seal 41 presses against the raised layer 7 to seal the upper chamber, thereby keeping the measuring probe 44 in the upper chamber without contacting the crude oil when idle. The solenoid valve is opened and the electric push rod 2 9 is operated, and the piston block 10 is driven to rise by the electric push rod 2 9 to push the crude oil in the lower chamber out.

[0032] Example 2: Comparative Example 1, please refer to Figure 5 As shown, the utility model provides another embodiment, a scraper 8 is fixedly connected to the inside of the raised layer 7, a cleaning hole is opened on the surface of the scraper 8, and the cleaning hole is located directly below the measuring probe 44. The measuring probe 44 moves up and down and passes through the cleaning hole, and then the scraper 8 scrapes off the impurities adhered to the surface of the measuring probe 44, thereby realizing automatic cleaning and avoiding the occurrence of wax hanging phenomenon.

[0033] The diameter of the cleaning hole is the same as the diameter of the measuring probe 44.

[0034] Through the use of wires by those skilled in the art, all electrical components in this case are connected to their corresponding power supplies, and a suitable controller should be selected to be electrically connected to the solenoid valve and the liquid level sensor 6 according to actual conditions. The controller is electrically connected to the water analyzer, and the water analyzer is electrically connected to the measuring probe 44. The detection results of the measuring probe 44 are transmitted to the water analyzer to meet the control requirements. The specific connection and control sequence should refer to the following working principle, in which the electrical components are electrically connected in sequence. The detailed connection means are well known in the art. The following mainly introduces the working principle and process, and does not explain the electrical control.

[0035] Working principle: connect the detection pipeline 1 to the crude oil pipeline. Initially, the bottom end of the seal 41 is pressed against the raised layer 7 for sealing. During detection, the electric push rod 43 extends to make the seal 41 descend, thereby opening the raised layer 7 and allowing the crude oil to enter the lower chamber. The crude oil level inside the lower chamber is detected by the liquid level sensor 6. When the liquid level is about two-thirds of the height of the lower chamber, the solenoid valve is controlled to close and the heater 45 is operated to heat the crude oil from the inside. After heating, detection is carried out through the measuring probe 44.

[0036] After the test is completed, the electric push rod 1 43 is lowered again, so that the upper end of the seal 41 abuts against the raised layer 7 to seal the upper chamber, thereby keeping the measuring probe 44 in the upper chamber without contacting the crude oil when idle. The solenoid valve is opened and the electric push rod 2 9 is operated, which drives the piston block 10 to rise and push the crude oil in the lower chamber out.

[0037] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0038] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.

Claims

1. A high-precision wellhead crude oil water content analyzer with automatic switching of two pipe sections, comprising a detection pipe (1), characterized in that: The side wall of the detection pipe (1) is fixedly connected to a liquid inlet pipe (2), and a solenoid valve is installed on the liquid inlet pipe (2). The surface of the liquid inlet pipe (2) is fixedly connected to a detection cylinder (3), and a detection component (4) is installed inside the detection cylinder (3). The detection component (4) includes an I-shaped sealing member (41) and an electric push rod (43). A flow channel (42) is opened at the center of the sealing member (41). The electric push rod (43) is fixedly installed on the top of the detection cylinder (3), and the driving end of the electric push rod (43) is fixedly connected to the sealing member (41). A measuring probe (44) and a heater (45) are fixedly connected above the sealing member (41).

2. The high-precision wellhead crude oil water content analyzer with automatic switching of dual pipe sections according to claim 1 is characterized by: Sealing rings (46) are fixedly connected to the upper and lower parts of the sealing member (41) respectively.

3. The high-precision wellhead crude oil water content analyzer with automatic switching of dual pipe sections according to claim 1 is characterized by: A piston ring (5) is installed inside the circulation channel (42), and the piston ring (5) is fixedly connected to the bottom end of the liquid inlet pipe (2).

4. The high-precision wellhead crude oil water content analyzer with automatic switching of two pipe sections according to claim 1 is characterized by: A liquid level sensor (6) is fixedly connected below the sealing member (41).

5. The high-precision wellhead crude oil water content analyzer with automatic switching of dual pipe sections according to claim 1 is characterized by: An annular raised layer (7) is installed inside the detection cylinder (3).

6. The high-precision wellhead crude oil water content analyzer with automatic switching of two pipe sections according to claim 5 is characterized by: A scraper (8) is fixedly connected to the interior of the raised layer (7), and a cleaning hole is provided on the surface of the scraper (8), and the cleaning hole is located directly below the measuring probe (44).

7. The high-precision wellhead crude oil water content analyzer with automatic switching of two pipe sections according to claim 6 is characterized by: The diameter of the cleaning hole is the same as the diameter of the measuring probe (44).

8. The high-precision wellhead crude oil water content analyzer with automatic switching of two pipe sections according to claim 1 is characterized by: The bottom of the detection cylinder (3) is fixedly connected to an electric push rod 2 (9), and the driving end of the electric push rod 2 (9) is fixedly connected to a piston block (10).

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