An on-line analysis and measurement device for water in crude oil production

Abstract

The present application relates to the technical field of oil and gas production, in particular to a kind of crude oil production water content online analysis and measuring device, including pipeline positioning mechanism, centering clamping mechanism and lifting mechanism, lifting mechanism is arranged on the side of oil and gas pipeline, pipeline positioning mechanism and centering clamping mechanism are arranged on the lifting mechanism, when installing water content online analyzer to oil and gas pipeline, the accurate control of the installation position of water content online analyzer is realized, the setting position and inclined posture of the sensing probe of water content online analyzer in oil and gas pipeline are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of oil and gas production technology, specifically to an online analysis and measurement device for water content in crude oil production. Background Technology

[0002] In the process of oil production and management, real-time monitoring of changes in crude oil water content is crucial for dynamic analysis of oil wells, control of the operational status of oil station facilities, and assurance of the quality of exported crude oil. However, due to factors such as radioactivity, unstable measurement results, excessive size, and high cost, traditional online automatic crude oil water content analyzers have not been widely adopted in the oil and petrochemical production industry.

[0003] Manual sampling and testing is currently the most common method for water cut detection in oilfields. Whether at the wellhead or in the pipeline, oil samples need to be manually extracted and analyzed in the laboratory regularly. The measurement process involves procedures such as water bath heating, rough water cut measurement with a graduated cylinder, centrifugation, and manual calculation. Analyzing a single sample is time-consuming, and the sample volume is very small compared to the volume of liquid flowing through the pipeline, resulting in poor sample representativeness.

[0004] The online water content analyzer utilizes the different absorption rates of high-frequency electromagnetic waves by oil and water. Because water's dielectric constant is much greater than that of oil, its absorption rate of high-frequency electromagnetic waves is significantly higher. By measuring the electromagnetic wave energy in the electromagnetic resonant cavity probe, the water content in crude oil can be determined through data processing and analysis. The sensing probe employs a high-frequency electromagnetic resonant cavity structure. This structure features concentrated electromagnetic wave energy within the probe, good signal stability, resistance to wax formation, and immunity to the effects of oil-in-water or water-in-oil emulsions. The excitation signal uses a 1GHz high-frequency signal. A 1GHz signal source has a small frequency broadening, and the water salinity has minimal impact on the detection results at this frequency.

[0005] However, while this type of online water content analyzer has many advantages, it requires accurate installation to ensure that the sensor probe is in full contact with the oil and water in the oil and gas pipeline, thus guaranteeing the accuracy and precision of the measurement. At the same time, the tilt angle of the sensor probe in the oil and gas pipeline will directly affect the degree of adhesion of crude oil to the sensor probe. Ensuring the installation accuracy of the online water content analyzer is crucial to prevent blockage of the oil and gas pipeline. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides an online water content analysis and measurement device for crude oil production. Through a specially designed pipeline positioning mechanism and centering clamping mechanism, the sensing probe of the online water content analyzer can be inserted into the oil and gas pipeline at a precise tilt angle to the designated installation position.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an online analysis and measurement device for water content in crude oil production, comprising a pipeline positioning mechanism, a centering clamping mechanism, and a lifting mechanism, wherein the lifting mechanism is provided on one side of the oil and gas pipeline, and the pipeline positioning mechanism and the centering clamping mechanism are provided on the lifting mechanism;

[0008] The oil and gas pipeline includes an oil and gas pipeline body, a second pipe body, and a pipe flange. The pipe flange is located at the end of the second pipe body, and the detection end of the online water content analyzer is inserted into the second pipe body and fixedly connected through the pipe flange.

[0009] The lifting mechanism raises the pipe positioning mechanism to the same height as the second pipe body, and the pipe positioning mechanism clamps the second pipe body to fix the relative position of the centering clamping mechanism with respect to the pipe flange on the second pipe body.

[0010] The lifting mechanism includes a lifting base, a scissor lift mechanism, a drive cylinder, a lifting platform, and moving wheels. The scissor lift mechanism is mounted on the lifting base, and a lifting platform is mounted on the top of the scissor lift mechanism. A drive cylinder is mounted in the middle of the scissor lift mechanism, which drives the extension and retraction of the scissor lift mechanism, thereby driving the lifting and lowering of the lifting platform. A pipe positioning mechanism and a centering clamping mechanism are mounted on the lifting platform. The relative positions of the pipe positioning mechanism and the centering clamping mechanism on the lifting platform are fixed, and the clamping center of the pipe positioning mechanism is coaxial with the clamping center of the centering clamping mechanism.

[0011] After the pipeline positioning mechanism clamps the second pipe body, the online water content analyzer is clamped by the centering clamping mechanism, which enables the online water content analyzer to be coaxial with respect to the second pipe body, so that the detection end of the online water content analyzer extends into the second pipe body and reaches the precise position inside the main body of the oil and gas pipeline.

[0012] Furthermore, the online water content analyzer includes an analyzer head, a mounting base, an analyzer flange, an expansion joint, and a sensor probe;

[0013] The upper end of the mounting base is detachably equipped with an analytical instrument head, and the lower end of the mounting base is connected to a multi-section expansion joint, with a sensing probe installed on the expansion joint at the end.

[0014] The two ends of the expansion joint are sequentially sealed and connected by a threaded structure. By connecting different numbers of expansion joints, the position of the sensing probe from the mounting base can be changed.

[0015] Furthermore, the expansion joint includes a first elastic sealing ring, a second elastic sealing ring, an external thread section, a sealing groove, an internal thread section, a sealing boss, an expansion joint body, an expansion joint shell, and a filling layer.

[0016] The expansion joint includes an expansion joint body and an expansion joint outer shell, and the expansion joint body and the expansion joint outer shell are bonded, fixed and sealed by a filler layer;

[0017] The head of the telescopic joint body is provided with a sealing boss, the upper end surface of the sealing boss is provided with a first elastic sealing ring, the stepped surface of the sealing boss is provided with a second elastic sealing ring, and the outer side of the head of the telescopic joint body not covered by the telescopic joint shell is provided with an external thread section.

[0018] The tail end of the expansion joint body is also provided with a sealing groove, the shape of which is adapted to the sealing boss.

[0019] The inner side of the tail of the expansion joint housing is provided with an internal thread section, which is adapted to the external thread section.

[0020] Furthermore, the pipe positioning mechanism includes a first clamping block, a second clamping block, a guide rod, a support base, a drive screw, a first handwheel, and a linkage seat;

[0021] The lifting platform is provided with a support base. A guide rod and a drive screw are arranged parallel to each other between the support bases. The first clamping block and the second clamping block are slidably supported on the guide rod and driven to move in opposite directions by the drive screw. The two ends of the drive screw are respectively provided with a first handwheel, and the middle part of the drive screw is connected by a linkage seat.

[0022] The first clamping block and the second clamping block are symmetrical and arranged facing each other. The first clamping block and the second clamping block are provided with wedge-shaped clamping openings on their opposite sides. The wedge-shaped clamping openings can achieve automatic centering when clamping the second tube.

[0023] Furthermore, the centering clamping mechanism includes a centering base, a second handwheel, a drive gear, a gear disk, a hinged seat, a centering clamping rod, and a centering disc;

[0024] The lifting platform is provided with a centering base, on which a second handwheel and a drive gear are rotatably mounted. The drive gear is connected to the second handwheel in a transmission manner. The centering base is also rotatably mounted with a gear disk, and the drive gear meshes with the gear disk.

[0025] A centering plate is fixedly provided at the upper end of the centering base, and the center position of the centering plate is coaxial with the center position of the wedge-shaped clamping opening of the first clamping block and the second clamping block.

[0026] The gear disk is provided with hinge seats at equal intervals around its circumference, and multiple centering clamps are rotatably provided on the hinge seats, the centering clamps extending into the interior of the centering disk;

[0027] By rotating the second handwheel, the gear disk is driven to rotate relative to the centering disk, thereby enabling the multiple centering clamps to clamp and position the mounting base.

[0028] Furthermore, the centering clamp includes a first centering clamp, a second centering clamp, and a third centering clamp;

[0029] The centering plate includes a first rotating seat, a second rotating seat, a third rotating seat, and a centering plate body;

[0030] The first rotating seat, the second rotating seat, and the third rotating seat are rotatably arranged at equally spaced positions along the circumference of the centering plate body;

[0031] One end of the first centering clamp, the second centering clamp, and the third centering clamp is hinged to the hinge seat, and the other end is slidably supported on the first rotating seat, the second rotating seat, and the third rotating seat, respectively.

[0032] When the gear disk rotates relative to the centering disk, the hinge seat moves closer to / away from the corresponding first rotating seat / second rotating seat / third rotating seat, thereby changing the length of the first centering clamp rod, second centering clamp rod, and third centering clamp rod extending into the corresponding first rotating seat, second rotating seat, and third rotating seat. At the same time, the first rotating seat, second rotating seat, and third rotating seat rotate a certain angle on the centering disk body, thereby realizing the clamping and positioning of the first centering clamp rod, second centering clamp rod, and third centering clamp rod on the mounting base.

[0033] Furthermore, the first centering clamp, the second centering clamp, and the third centering clamp have the same structure and each includes a centering clamp body, an arc-shaped surface, and a sliding ball;

[0034] The centering clamp body is slidably mounted on the first rotating seat / second rotating seat / third rotating seat. When the gear disk rotates relative to the centering disk and causes the hinge seat to move closer to / away from the corresponding first rotating seat / second rotating seat / third rotating seat, the centering clamp body slides relative to the first rotating seat / second rotating seat / third rotating seat. At the same time, the first rotating seat, second rotating seat, and third rotating seat rotate a certain angle on the gear disk, causing the arc-shaped surface to move toward the center position of the centering disk, thereby causing the sliding ball to abut against the outer peripheral surface of the mounting base.

[0035] Compared with the prior art, the present invention provides an online analysis and measurement device for water content in crude oil production, which has the following advantages:

[0036] 1. This invention, through a specially designed pipeline positioning mechanism and centering clamping mechanism, achieves precise control over the installation position of the online water content analyzer when it is installed on an oil and gas pipeline. This ensures the placement and tilt of the sensor probe of the online water content analyzer in the oil and gas pipeline, and ensures sufficient contact between the sensor probe and oil and water in the pipeline to guarantee the accuracy and precision of the measurement. At the same time, it can also prevent crude oil from adhering to the sensor probe, thereby preventing blockage of the oil and gas pipeline.

[0037] 2. This invention, through a specially designed telescopic joint structure, allows for convenient adjustment of the sensor probe's position relative to the mounting base, ensuring that the sensor probe can be inserted into the designated location in the oil and gas pipeline. Simultaneously, the structure, featuring multiple elastic sealing rings, sealing bosses, and sealing grooves, guarantees both the structural strength and airtightness of the telescopic joint, while avoiding unnecessary mechanical moving parts. Furthermore, the anti-oil-adhesive surface treatment ensures long-term reliable operation and maintenance-free maintenance of the instrument. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the overall structure of the online water content analyzer installation equipment of the present invention;

[0039] Figure 2 This is a schematic diagram of the structure of the online water content analyzer of the present invention;

[0040] Figure 3 This is a schematic diagram of the expansion joint of the present invention;

[0041] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle;

[0042] Figure 5 This is a schematic diagram of the lifting mechanism of the present invention;

[0043] Figure 6 This is a schematic diagram of the pipe positioning mechanism of the present invention;

[0044] Figure 7 This is a schematic diagram of the centering and clamping mechanism of the present invention;

[0045] Figure 8 This is a schematic diagram of the gear disk structure of the present invention;

[0046] Figure 9 This is a schematic diagram of the centering plate of the present invention;

[0047] Figure 10 This is a schematic diagram of the centering clamp of the present invention;

[0048] In the diagram: 1. Online water content analyzer; 11. Analyzer head; 12. Mounting base; 13. Analyzer flange; 14. Expansion joint; 141. First elastic sealing ring; 142. Second elastic sealing ring; 143. External thread section; 144. Sealing groove; 145. Internal thread section; 146. Sealing boss; 147. Expansion joint body; 148. Expansion joint shell; 149. Filling layer; 15. Sensor probe; 2. Pipe positioning mechanism; 21. First clamping block; 22. Second clamping block; 23. Guide rod; 24. Support base; 25. Drive screw; 26. First handwheel; 27. Linkage seat; 3. Centering clamping mechanism; 31. Centering base; ... Second-hand wheel 32, drive gear 33, gear disc 34, hinge seat 35, centering clamp 36, first centering clamp 361, centering clamp body 3611, arc surface 3612, sliding ball 3613, second centering clamp 362, third centering clamp 363, centering plate 37, first rotating seat 371, second rotating seat 372, third rotating seat 373, centering plate body 374, lifting mechanism 4, lifting base 41, scissor lifting mechanism 42, drive cylinder 43, lifting platform 44, moving wheel 45, oil and gas pipeline 5, oil and gas pipeline body 51, second pipe body 52, pipeline flange 53. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] The following is based on the appendix Figure 1-10 The present invention will be described in detail. The online water content analyzer installation equipment of the present invention includes a pipeline positioning mechanism 2, a centering clamping mechanism 3 and a lifting mechanism 4. The lifting mechanism 4 is provided on one side of the oil and gas pipeline 5, and the pipeline positioning mechanism 2 and the centering clamping mechanism 3 are provided on the lifting mechanism 4.

[0051] The oil and gas pipeline 5 includes an oil and gas pipeline body 51, a second pipe body 52, and a pipe flange 53. The pipe flange 53 is located at the end of the second pipe body 52. ​​The detection end of the online water content analyzer 1 is inserted into the second pipe body 52 and is fixedly connected through the pipe flange 53.

[0052] The lifting mechanism 4 raises the pipe positioning mechanism 2 to the same height as the second pipe body 52, and the pipe positioning mechanism 2 clamps the second pipe body 52 to fix the relative position of the centering clamping mechanism 3 with respect to the pipe flange 53 on the second pipe body 52.

[0053] The lifting mechanism 4 includes a lifting base 41, a scissor lift mechanism 42, a drive cylinder 43, a lifting platform 44, and moving wheels 45. The scissor lift mechanism 42 is provided on the lifting base 41. The lifting platform 44 is provided at the top of the scissor lift mechanism 42. The drive cylinder 43 is provided in the middle of the scissor lift mechanism 42. The drive cylinder 43 can drive the extension and retraction of the scissor lift mechanism 42, thereby driving the lifting and lowering of the lifting platform 44. The lifting platform 44 is provided with a pipe positioning mechanism 2 and a centering clamping mechanism 3. The relative positions of the pipe positioning mechanism 2 and the centering clamping mechanism 3 on the lifting platform 44 are fixed, and the clamping center of the pipe positioning mechanism 2 is coaxial with the clamping center of the centering clamping mechanism 3.

[0054] After the pipeline positioning mechanism 2 clamps the second pipe body 52, the online water content analyzer 1 is clamped by the centering clamping mechanism 3, which enables the online water content analyzer 1 to be coaxial with respect to the second pipe body 52, so that the detection end of the online water content analyzer 1 extends into the second pipe body 52 and reaches the precise position inside the oil and gas pipeline body 51.

[0055] The basic type of online water content analyzer 1 of this invention is an insertion-type online water content analyzer that uses electromagnetic wave phase shift detection technology to measure the dielectric constant of crude oil. Based on the magnitude of the overall dielectric constant of the mixed liquid, the water content of the crude oil is calculated. This water content analyzer uses an integrated dedicated chip as its core measurement unit. The use of this high-tech chip gives the instrument the characteristics of small size, large measurement range (0~100%), high measurement accuracy, good operational stability, and simple installation.

[0056] Online water content metering enables comprehensive online water content metering and monitoring, remote data transmission, real-time online monitoring of comprehensive water content, and integration with existing digital platforms. It can monitor and record changes in the water content of crude oil in pipelines in real time, meeting the needs of the production site.

[0057] Furthermore, the online water content analyzer 1 includes an analyzer head 11, a mounting base 12, an analyzer flange 13, an expansion joint 14, and a sensor probe 15;

[0058] The upper end of the mounting base 12 is detachably provided with an analytical instrument head 11, and the lower end of the mounting base 12 is connected to a multi-section telescopic joint 14, with a sensing probe 15 provided on the telescopic joint 14 at the end.

[0059] The two ends of the expansion joint 14 are sequentially sealed and connected by a threaded structure. By connecting different numbers of expansion joints 14, the position of the sensing probe 15 from the mounting base 12 can be changed.

[0060] Furthermore, the expansion joint 14 includes a first elastic sealing ring 141, a second elastic sealing ring 142, an external thread section 143, a sealing groove 144, an internal thread section 145, a sealing boss 146, an expansion joint body 147, an expansion joint outer shell 148, and a filling layer 149.

[0061] The expansion joint 14 includes an expansion joint body 147 and an expansion joint outer shell 148, and the expansion joint body 147 and the expansion joint outer shell 148 are bonded, fixed and sealed by a filling layer 149.

[0062] The head of the telescopic joint body 147 is provided with a sealing boss 146, a first elastic sealing ring 141 is provided on the upper end surface of the sealing boss 146, a second elastic sealing ring 142 is provided on the stepped surface of the sealing boss 146, and an external thread section 143 is provided on the outer side of the head of the telescopic joint body 147 that is not covered by the telescopic joint housing 148.

[0063] The tail of the telescopic joint body 147 is also provided with a sealing groove 144, the shape of which is adapted to the sealing boss 146.

[0064] The inner side of the tail of the telescopic joint housing 148 is provided with an internal thread section 145, which is adapted to the external thread section 143.

[0065] The above structure achieves precise installation, sealing, and structural strength of the sensor probe 15. It employs electromagnetic wave phase-shift detection technology to measure the dielectric constant of crude oil. It is ready to use upon power-up, contains no radioactive materials, and has no moving parts, ensuring high measurement resolution, strong media adaptability, and safety and environmental friendliness. It can directly replace early-installed radioactive water content instruments in oil fields. An integrated temperature sensor is included because the dielectric constant of water decreases with increasing temperature, leading to a lower measured water content value. Temperature compensation accurately corrects the measurement results, improving accuracy. The sensor probe 15 is made of 316 stainless steel, making it suitable for various acidic and alkaline corrosive liquids and most measured media, including organic solvents such as toluene. The absence of moving mechanical parts, coupled with an anti-oil-sticking surface treatment, ensures long-term reliable and maintenance-free operation.

[0066] Furthermore, the pipe positioning mechanism 2 includes a first clamping block 21, a second clamping block 22, a guide rod 23, a support base 24, a drive screw 25, a first handwheel 26, and a linkage seat 27;

[0067] The lifting platform 44 is provided with a support base 24. A guide rod 23 and a drive screw 25 are arranged parallel to each other on the support base 24. The first clamping block 21 and the second clamping block 22 are slidably supported on the guide rod 23 and are driven to move in opposite directions by the drive screw 25. The two ends of the drive screw 25 are respectively provided with a first handwheel 26, and the middle part of the drive screw 25 is connected by a linkage seat 27.

[0068] The first clamping block 21 and the second clamping block 22 are symmetrical and face each other. The first clamping block 21 and the second clamping block 22 are provided with wedge-shaped clamping openings on their opposite sides. The wedge-shaped clamping openings can achieve automatic centering when clamping the second tube 52.

[0069] Furthermore, the centering clamping mechanism 3 includes a centering base 31, a second handwheel 32, a drive gear 33, a gear disk 34, a hinge seat 35, a centering clamping rod 36, and a centering disc 37;

[0070] The lifting platform 44 is provided with a centering base 31. The centering base 31 is rotatably provided with a second handwheel 32 and a drive gear 33. The drive gear 33 is connected to the second handwheel 32 in a transmission manner. The centering base 31 is also rotatably provided with a gear disk 34. The drive gear 33 meshes with the gear disk 34.

[0071] A centering disk 37 is fixedly provided at the upper end of the centering base 31, and the center position of the centering disk 37 is coaxial with the center position of the wedge-shaped clamping opening of the first clamping block 21 and the second clamping block 22.

[0072] The gear disk 34 is provided with hinge seats 35 at equal intervals around its circumference. Multiple centering clamps 36 are rotatably provided on the hinge seats 35, and the centering clamps 36 extend into the interior of the centering disk 37.

[0073] By rotating the second handwheel 32, the gear disk 34 is driven to rotate relative to the centering disk 37, thereby enabling the multiple centering clamps 36 to clamp and position the mounting base 12.

[0074] Furthermore, the centering clamp 36 includes a first centering clamp 361, a second centering clamp 362, and a third centering clamp 363;

[0075] The centering plate 37 includes a first rotating seat 371, a second rotating seat 372, a third rotating seat 373, and a centering plate body 374;

[0076] The first rotating seat 371, the second rotating seat 372, and the third rotating seat 373 are rotatably arranged at equally spaced positions in the circumference of the centering plate body 374.

[0077] One end of the first centering clamp 361, the second centering clamp 362, and the third centering clamp 363 is hinged to the hinge seat 35, and the other end is slidably supported on the first rotating seat 371, the second rotating seat 372, and the third rotating seat 373, respectively.

[0078] When the gear disk 34 rotates relative to the centering disk 37, the hinge seat 35 moves closer to / away from the corresponding first rotating seat 371 / second rotating seat 372 / third rotating seat 373, thereby changing the length of the first centering clamping rod 361, second centering clamping rod 362, and third centering clamping rod 363 extending into the corresponding first rotating seat 371, second rotating seat 372, and third rotating seat 373. At the same time, the first rotating seat 371, second rotating seat 372, and third rotating seat 373 rotate a certain angle on the centering disk body 374, thereby realizing the clamping and positioning of the first centering clamping rod 361, second centering clamping rod 362, and third centering clamping rod 363 on the mounting base 12.

[0079] Furthermore, the first centering clamp 361, the second centering clamp 362, and the third centering clamp 363 have the same structure and each includes a centering clamp body 3611, an arc-shaped surface 3612, and a sliding ball 3613.

[0080] The centering clamp body 3611 is slidably mounted on the first rotating seat 371 / second rotating seat 372 / third rotating seat 373. When the gear disk 34 rotates relative to the centering disk 37 and causes the hinge seat 35 to move closer to / away from the corresponding first rotating seat 371 / second rotating seat 372 / third rotating seat 373, the centering clamp body 3611 slides relative to the first rotating seat 371 / second rotating seat 372 / third rotating seat 373. At the same time, the first rotating seat 371, second rotating seat 372, and third rotating seat 373 rotate on the gear disk 34 by a certain angle, causing the arc-shaped surface 3612 to move toward the center position of the centering disk 37, thereby causing the sliding ball 3613 to abut against the outer peripheral surface of the mounting base 12.

[0081] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An online analysis and measurement device for water content in crude oil production, comprising a pipeline positioning mechanism (2), a centering clamping mechanism (3), and a lifting mechanism (4), characterized in that: A lifting mechanism (4) is provided on one side of the oil and gas pipeline (5). The lifting mechanism (4) is equipped with a pipeline positioning mechanism (2) and a centering clamping mechanism (3). The oil and gas pipeline (5) includes an oil and gas pipeline body (51), a second pipe body (52), and a pipe flange (53). The pipe flange (53) is located at the end of the second pipe body (52). The detection end of the online water content analyzer (1) is inserted into the second pipe body (52) and fixedly connected through the pipe flange (53). The lifting mechanism (4) lifts the pipe positioning mechanism (2) to the same height as the second pipe body (52), and clamps the second pipe body (52) through the pipe positioning mechanism (2), thereby fixing the relative position of the centering clamping mechanism (3) relative to the pipe flange (53) on the second pipe body (52); The lifting mechanism (4) includes a lifting base (41), a scissor lifting mechanism (42), a drive cylinder (43), a lifting platform (44), and moving wheels (45). The lifting base (41) is provided with a scissor lifting mechanism (42). The top of the scissor lifting mechanism (42) is provided with a lifting platform (44). The middle of the scissor lifting mechanism (42) is provided with a drive cylinder (43). The drive cylinder (43) can drive the extension and retraction of the scissor lifting mechanism (42) and thereby drive the lifting platform (44) to rise and fall. The lifting platform (44) is provided with a pipe positioning mechanism (2) and a centering clamping mechanism (3). The relative positions of the pipe positioning mechanism (2) and the centering clamping mechanism (3) on the lifting platform (44) are fixed, and the clamping center of the pipe positioning mechanism (2) is coaxial with the clamping center of the centering clamping mechanism (3). After the pipeline positioning mechanism (2) clamps the second pipe body (52), the online water content analyzer (1) is clamped by the centering clamping mechanism (3), which can realize the coaxiality of the online water content analyzer (1) relative to the second pipe body (52), so that the detection end of the online water content analyzer (1) extends into the second pipe body (52) and reaches the precise position inside the oil and gas pipeline body (51); The online water content analyzer (1) includes an analyzer head (11), a mounting base (12), an analyzer flange (13), an expansion joint (14), and a sensor probe (15); The upper end of the mounting base (12) is detachably provided with an analytical instrument head (11), and the lower end of the mounting base (12) is connected to a multi-section telescopic joint (14), with a sensor probe (15) provided on the telescopic joint (14) at the end. The two ends of the expansion joint (14) are sequentially sealed and connected by a threaded structure. By connecting different numbers of expansion joints (14), the position of the sensing probe (15) from the mounting base (12) can be changed. The pipeline positioning mechanism (2) includes a first clamping block (21), a second clamping block (22), a guide rod (23), a support base (24), a drive screw (25), a first handwheel (26), and a linkage seat (27). The lifting platform (44) is provided with a support base (24). A guide rod (23) and a drive screw (25) are arranged parallel to each other on the support base (24). The first clamping block (21) and the second clamping block (22) are slidably supported on the guide rod (23) and driven by the drive screw (25) to move the first clamping block (21) and the second clamping block (22) in opposite directions. The two ends of the drive screw (25) are respectively provided with a first handwheel (26), and the middle part of the drive screw (25) is connected by a linkage seat (27). The first clamping block (21) and the second clamping block (22) are symmetrical and face each other. The first clamping block (21) and the second clamping block (22) are provided with wedge-shaped clamping openings on their opposite sides. The wedge-shaped clamping openings can achieve automatic centering when clamping the second tube (52). The centering clamping mechanism (3) includes a centering base (31), a second handwheel (32), a drive gear (33), a gear disk (34), a hinge seat (35), a centering clamping rod (36), and a centering disk (37). The lifting platform (44) is provided with a centering base (31), and a second handwheel (32) and a drive gear (33) are rotatably provided on the centering base (31). The drive gear (33) is connected to the second handwheel (32) in a transmission. A gear disk (34) is also rotatably provided on the centering base (31), and the drive gear (33) meshes with the gear disk (34). The centering base (31) is fixedly provided with a centering disk (37) at its upper end. The center position of the centering disk (37) is coaxial with the center position of the wedge-shaped clamping opening of the first clamping block (21) and the second clamping block (22). The gear disk (34) is provided with hinge seats (35) at equal intervals in the circumference. Multiple centering clamps (36) are rotatably provided on the hinge seats (35), and the centering clamps (36) extend into the interior of the centering disk (37). By rotating the second handwheel (32), the gear disk (34) is driven to rotate relative to the centering disk (37), thereby enabling the multiple centering clamps (36) to clamp and position the mounting base (12).

2. The online analysis and measurement device for water content in crude oil production according to claim 1, characterized in that: The expansion joint (14) includes a first elastic sealing ring (141), a second elastic sealing ring (142), an external thread section (143), a sealing groove (144), an internal thread section (145), a sealing boss (146), an expansion joint body (147), an expansion joint shell (148), and a filling layer (149). The expansion joint (14) includes an expansion joint body (147) and an expansion joint shell (148), and the expansion joint body (147) and the expansion joint shell (148) are bonded, fixed and sealed by a filling layer (149); The head of the telescopic joint body (147) is provided with a sealing boss (146), a first elastic sealing ring (141) is provided on the upper end surface of the sealing boss (146), a second elastic sealing ring (142) is provided on the stepped surface of the sealing boss (146), and an external thread section (143) is provided on the outer side of the head of the telescopic joint body (147) that is not covered by the telescopic joint shell (148). The tail of the telescopic joint body (147) is also provided with a sealing groove (144), the shape of which is adapted to the sealing boss (146). The inner side of the tail of the telescopic joint housing (148) is provided with an internal thread section (145), which is adapted to the external thread section (143).

3. The online analysis and measurement device for water content in crude oil production according to claim 2, characterized in that: The centering clamp (36) includes a first centering clamp (361), a second centering clamp (362), and a third centering clamp (363); The centering plate (37) includes a first rotating seat (371), a second rotating seat (372), a third rotating seat (373), and a centering plate body (374). The first rotating seat (371), the second rotating seat (372), and the third rotating seat (373) are rotatably arranged at equally spaced positions in the circumference of the centering plate body (374); One end of the first centering clamp (361), the second centering clamp (362), and the third centering clamp (363) is hinged to the hinge seat (35), and the other end is slidably supported on the first rotating seat (371), the second rotating seat (372), and the third rotating seat (373), respectively. When the gear disk (34) rotates relative to the centering disk (37), the hinge seat (35) moves closer to or further away from the corresponding first rotating seat (371), second rotating seat (372), and third rotating seat (373), thereby changing the length of the first centering clamp (361), second centering clamp (362), and third centering clamp (363) extending into the corresponding first rotating seat (371), second rotating seat (372), and third rotating seat (373). At the same time, the first rotating seat (371), second rotating seat (372), and third rotating seat (373) rotate a certain angle on the centering disk body (374), thereby realizing the clamping and positioning of the first centering clamp (361), second centering clamp (362), and third centering clamp (363) on the mounting base (12).

4. The online water content analysis and measurement device for crude oil production according to claim 3, characterized in that: The first centering clamp (361), the second centering clamp (362), and the third centering clamp (363) have the same structure and each includes a centering clamp body (3611), an arc surface (3612), and a sliding ball (3613). The centering clamp body (3611) is slidably disposed on the first rotating seat (371), the second rotating seat (372), and the third rotating seat (373). When the gear disk (34) rotates relative to the centering disk (37) and causes the hinge seat (35) to move closer to or further away from the corresponding first rotating seat (371), second rotating seat (372), and third rotating seat (373), the centering clamp body (3611) slides relative to the first rotating seat (371), second rotating seat (372), and third rotating seat (373). At the same time, the first rotating seat (371), second rotating seat (372), and third rotating seat (373) rotate a certain angle on the gear disk (34), causing the arc surface (3612) to move toward the center position of the centering disk (37), thereby causing the sliding ball (3613) to abut against the outer peripheral surface of the mounting base (12).

Images