An oil well downhole fault monitoring apparatus

Abstract

The present application relates to the technical field of downhole monitoring, and particularly relates to a downhole fault monitoring device for oil well, which aims to solve the technical problem of insufficient rigidity of the execution mechanism caused by the flexible rope transmission in the related art, thereby affecting the stability of the scraper in removing impurities. The downhole fault monitoring device for oil well comprises a detection mechanism, a scraping mechanism and a driving mechanism. The detection mechanism comprises a cylinder and a pressure sensor. The scraping mechanism is rotationally connected to the cylinder. The scraping mechanism comprises a scraper, and the driving mechanism drives the scraper to rotate through gear transmission. The downhole fault monitoring device for oil well completes the monitoring feedback of the internal pressure and the cleaning of the impurities attached to the pressure sensor through the pressure sensor and the scraping mechanism. The gear transmission is adopted between the scraping mechanism and the driving mechanism. The technical problem of insufficient rigidity of the execution mechanism caused by the flexible rope transmission in the existing downhole fault monitoring device for oil well, thereby affecting the stability of the scraper in removing impurities, is overcome.

Description

Technical Field

[0001] This invention relates to the field of downhole monitoring technology, and more particularly to a downhole fault monitoring device for oil wells. Background Technology

[0002] In oil and gas field safety production, fault monitoring technology is crucial for assessing the failure risks of critical equipment and pipelines. An existing downhole fiber optic pressure monitoring device (publication number CN 219241898 U) collects pressure data inside the pipeline using pressure sensors and indirectly drives a moving scraper to remove internal impurities by pulling a rope via a drive component, thus restoring the device's accuracy. However, due to the limited flexibility of the rope, the control precision of the moving scraper is relatively low, affecting the stability of impurity removal.

[0003] Existing downhole pressure monitoring equipment for oil wells suffers from technical problems, such as insufficient rigidity of the actuator due to the use of flexible rope transmission, which affects the stability of the scraper in removing impurities. Summary of the Invention

[0004] The purpose of this invention is to provide a downhole fault monitoring device for oil wells, so as to solve the technical problem in related technologies where the rigidity of the actuator is insufficient due to the use of flexible rope transmission, which affects the stability of the scraper in removing impurities.

[0005] To solve the above-mentioned technical problems, the technical solution provided by the present invention is as follows:

[0006] The downhole fault monitoring device for oil wells provided by this invention includes:

[0007] The system comprises a detection mechanism, a scraping mechanism, and a driving mechanism. The detection mechanism includes a cylinder and a pressure sensor. The cylinder is flanged between two pipe bodies. The scraping mechanism is rotatably connected to the cylinder. The scraping mechanism includes a scraper, and the driving mechanism drives the scraper to rotate via gear transmission to scrape away impurities from the surface of the pressure sensor.

[0008] Specifically, the cylinder includes an outer cylinder and an inner cylinder fixedly connected. The two ends of the outer cylinder are connected to the flanges of the pipe body, and the inner cylinder communicates with the pipe body. The outer cylinder and the inner cylinder form an annular cavity, and the pressure sensor is installed in the cavity and is tangent to the inner wall of the inner cylinder.

[0009] Specifically, the scraping mechanism includes a rotating frame and a scraping unit; the rotating frame is rotatably connected to the inner cylinder and powered by the driving mechanism; the scraping unit is mounted on the rotating frame and includes a scraper blade; the scraper blade scrapes the inner wall of the inner cylinder as the rotating frame rotates.

[0010] Specifically, the scraping unit also includes a rotating shaft. The rotating shaft is inserted into the rotating frame, and the scraper is mounted on the rotating shaft and tangential to the inner wall of the inner cylinder. The rotation of the rotating frame drives the scraper to scrape the inner wall of the inner cylinder.

[0011] Specifically, the rotating frame includes a rotating gear ring and a connecting frame. The rotating gear ring is rotatably connected to the inner cylinder, the connecting frame is installed inside the rotating gear ring, and the rotating shaft is inserted into the connecting frame.

[0012] Specifically, the scraping unit further includes a first gear, which is sleeved on the rotating shaft and abuts against the connecting frame. The scraping mechanism also includes a fixed gear ring, which is fixedly installed on the outer cylinder. The inner circumference of the fixed gear ring is provided with internal gear teeth, which mesh with the first gear. The rotating shaft is rotatably connected to the connecting frame, and a plurality of scraper blades are evenly distributed around the axis of the rotating shaft. The rotation of the connecting frame around the inner cylinder can drive the scraper blades to rotate in the opposite direction around the rotating shaft.

[0013] Specifically, the drive mechanism includes a motor and a transmission assembly. The motor is mounted on the outer cylinder, and one end of the transmission assembly is connected to the motor, while the other end is connected to the rotating gear ring, for transmitting the power of the motor to the rotating gear ring.

[0014] Specifically, the transmission assembly includes a transmission shaft, a second gear, a worm gear, and a worm. The transmission shaft is rotatably connected to the outer cylinder, and the second gear and the worm gear are both sleeved on the transmission shaft. The worm is mounted on the output end of the motor and meshes with the worm gear. The outer circumference of the rotating gear ring is provided with outer gear teeth, which mesh with the second gear.

[0015] Specifically, the multiple scraping units are evenly distributed around the axis of the rotating frame.

[0016] Specifically, the two rotating brackets are rotatably connected to both ends of the inner cylinder. The rotating shaft is simultaneously inserted into the two connecting brackets, and the scraper is located between the two connecting brackets.

[0017] Based on the above technical solutions, the beneficial effects of the present invention are analyzed as follows:

[0018] This invention provides a downhole fault monitoring device for oil wells, comprising:

[0019] The device comprises a detection mechanism, a scraping mechanism, and a driving mechanism; the detection mechanism includes a cylinder and a pressure sensor; the cylinder is flanged between two pipe bodies, and the pressure sensor is mounted on the cylinder; the scraping mechanism is rotatably connected to the cylinder; and the driving mechanism is mounted on the cylinder and rigidly poweredly connected to the scraping mechanism.

[0020] In practical applications, the cylindrical flange is connected between the two pipe bodies, and the internal pressure is monitored and fed back by the pressure sensor. When the adhesive on the inner wall affects the detection data, the scraping mechanism is driven by the drive mechanism to scrape off the adhesive on the inner wall of the cylinder, thereby improving the accuracy of the pressure sensor in detecting the internal pressure.

[0021] As can be seen, compared with existing technologies, this downhole fault monitoring device for oil wells, through the pressure sensor and the scraping mechanism, respectively monitors and provides feedback on internal pressure and cleans impurities adhering to the pressure sensor. The scraping mechanism and the drive mechanism are connected by gear transmission. This overcomes the technical problem in existing downhole fault monitoring devices for oil wells where the use of flexible rope transmission results in insufficient rigidity of the actuator, thus affecting the stability of the scraper's impurity removal. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the installation of a downhole fault monitoring device for oil wells provided in an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the overall cross-sectional structure of the downhole fault monitoring equipment for this oil well;

[0025] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0026] Figure 4 This is a schematic diagram of the outer cylinder structure;

[0027] Figure 5 This is a schematic diagram of the inner cylinder structure;

[0028] Figure 6 This is a schematic diagram of the combined structure of the scraping mechanism and the drive mechanism.

[0029] icon:

[0030] 001. Pipe body;

[0031] 100. Detection mechanism; 110. Cylinder; 111. Outer cylinder; 112. Inner cylinder; 101. Cavity; 120. Pressure sensor;

[0032] 200. Scraping mechanism; 210. Rotating frame; 211. Rotating gear ring; 212. Connecting frame; 220. Scraping unit; 221. Rotating shaft; 222. Scraper blade; 223. First gear; 224. Fixed gear ring;

[0033] 300. Drive mechanism; 310. Motor; 320. Transmission assembly; 321. Drive shaft; 322. Second gear; 323. Worm gear; 324. Worm. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0036] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0037] Existing downhole fault monitoring equipment for oil wells suffers from technical problems, such as insufficient rigidity of the actuator due to the use of flexible rope transmission, which affects the stability of the scraper in removing impurities.

[0038] In view of this, the present invention provides a downhole fault monitoring device for oil wells, comprising:

[0039] The system comprises a detection mechanism 100, a scraping mechanism 200, and a driving mechanism 300. The detection mechanism 100 includes a cylinder 110 and a pressure sensor 120. The cylinder 110 is flange-connected between two pipe bodies 001, and the pressure sensor 120 is mounted on the cylinder 110. The scraping mechanism 200 is rotatably connected to the cylinder 110. The driving mechanism 300 is mounted on the cylinder 110 and is poweredly connected to the scraping mechanism 200.

[0040] In summary, the downhole fault monitoring device for oil wells provided by this invention can achieve the following technical effects:

[0041] This downhole fault monitoring device for oil wells uses a pressure sensor 120 and a scraping mechanism 200 to monitor and provide feedback on internal pressure and clean impurities adhering to the pressure sensor 120, respectively. The scraping mechanism 200 and the drive mechanism 300 are connected by gear transmission. This overcomes the technical problem in existing downhole fault monitoring devices for oil wells where the use of flexible rope transmission results in insufficient rigidity of the actuator, thus affecting the stability of the scraper's impurity removal.

[0042] The following combination Figures 1 to 6 The structure and shape of the downhole fault monitoring device for oil wells provided in this embodiment are described in detail below:

[0043] Regarding the setting of pressure sensor 120 in cylinder 110, specifically:

[0044] The cylinder 110 includes an outer cylinder 111 and an inner cylinder 112 fixedly connected. The two ends of the outer cylinder 111 are connected to the flanges of the pipe body 001, and the inner cylinder 112 communicates with the pipe body 001. The outer cylinder 111 and the inner cylinder 112 form an annular cavity 101. A pressure sensor 120 is installed in the cavity 101 and is tangent to the inner wall of the inner cylinder 112. Multiple pressure sensors 120 are evenly distributed around the axis of the inner cylinder 112.

[0045] Regarding the structural composition of the scraping mechanism 200, specifically:

[0046] The scraping mechanism 200 includes a rotating frame 210 and a scraping unit 220. The rotating frame 210 is rotatably connected to the inner cylinder 112 and powered by the drive mechanism 300. The scraping unit 220 is mounted on the rotating frame 210 and includes a rotating shaft 221 and a scraper blade 222. The rotating shaft 221 is inserted into the rotating frame 210, and the scraper blade 222 is mounted on the rotating shaft 221 and tangential to the inner wall of the inner cylinder 112. The scraper blade 222 scrapes the inner wall of the inner cylinder 112 as the rotating frame 210 rotates.

[0047] In order to improve the scraping effect of the scraping mechanism 200, in this embodiment, multiple scraping units 220 are evenly distributed around the axis of the rotating frame 210.

[0048] In this embodiment, the rotating frame 210 includes a rotating gear ring 211 and a connecting frame 212; the rotating gear ring 211 is rotatably connected to the inner cylinder 112, the connecting frame 212 is installed inside the rotating gear ring 211, and the rotating shaft 221 is inserted into the connecting frame 212.

[0049] In order to improve the installation stability between the rotating shaft 221 and the connecting frame 212, in this embodiment, the two rotating frames 210 are respectively rotatably connected to both ends of the inner cylinder 112; the rotating shaft 221 is simultaneously inserted into the two connecting frames 212, and the scraper 222 is located between the two connecting frames 212.

[0050] To further improve the scraping effect of the scraping mechanism 200, in this embodiment, the scraping unit 220 further includes a first gear 223, which is sleeved on the rotating shaft 221 and abuts against the connecting frame 212. The scraping mechanism 200 also includes a fixed gear ring 224, which is fixedly installed on the outer cylinder 111. The inner circle of the fixed gear ring 224 is provided with inner gear teeth, which mesh with the first gear 223. The rotating shaft 221 is rotatably connected to the connecting frame 212, and multiple scrapers 222 are evenly distributed around the axis of the rotating shaft 221. The rotation of the connecting frame 212 around the inner cylinder 112 can drive the scrapers 222 to rotate in the opposite direction around the rotating shaft 221. Taking the rotation of the connecting frame 212 around the inner cylinder 112 as the revolution motion and the rotation of the scrapers 222 around the rotating shaft 221 as the rotation motion, the scraping mechanism 200 cleans the internal impurities of the oil adhering to the surface of the pressure sensor 120 through the superposition of the revolution motion and the opposite rotation motion. The connection between the fixed toothed ring 224 and the outer cylinder 111 can be set to welding or snap-fit, etc.

[0051] Regarding the structural composition of the drive mechanism 300, specifically:

[0052] The drive mechanism 300 includes a motor 310 and a transmission assembly 320. The motor 310 is mounted on the outer cylinder 111. One end of the transmission assembly 320 is connected to the motor 310, and the other end is connected to the rotating gear ring 211, which is used to transmit the power of the motor 310 to the rotating gear ring 211.

[0053] Regarding the structural composition of the transmission assembly 320, specifically:

[0054] The transmission assembly 320 includes a transmission shaft 321, a second gear 322, a worm gear 323, and a worm 324. The transmission shaft 321 is rotatably connected to the outer cylinder 111, and the second gear 322 and the worm gear 323 are both sleeved on the transmission shaft 321. The worm 324 is installed at the output end of the motor 310 and meshes with the worm gear 323. The outer circle of the rotating gear ring 211 is provided with outer gear teeth, which mesh with the second gear 322.

[0055] In summary, the specific working process of the downhole fault monitoring equipment for oil wells provided in this embodiment is as follows:

[0056] The outer cylinder 111 of the detection mechanism 100 is connected to the pipe body 001 via a flange. The internal pressure is monitored and fed back by the pressure sensor 120 on the inner wall of the inner cylinder 112. When the adhesive on the inner wall affects the detection data, the motor 310 drives the worm gear 324 and worm wheel 323 to mesh and rotate, so that the second gear 322 on the transmission shaft 321 meshes and rotates with the outer gear teeth of the rotating gear ring 211. When the rotating gear ring 211 rotates, the first gear 223 on the rotating shaft 221 meshes and rotates with the fixed gear ring 224, so that the rotating shaft 221 rotates itself while the connecting frame 212 rotates. The rotation of the connecting frame 212 around the inner cylinder 112 is the revolution motion, and the rotation of the scraper 222 around the rotating shaft 221 is the rotation motion. The scraper 222 continuously cleans the internal impurities of the oil adhering to the surface of the pressure sensor 120 through the superposition of the revolution motion and the opposite rotation motion.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A downhole fault monitoring device for oil wells, characterized in that, include: The device comprises a detection mechanism (100), a scraping mechanism (200), and a driving mechanism (300); the detection mechanism (100) includes a cylinder (110) and a pressure sensor (120); the cylinder (110) is flanged between two pipe bodies (001); the scraping mechanism (200) is rotatably connected to the cylinder (110); the scraping mechanism (200) includes a scraper (222), and the driving mechanism (300) drives the scraper (222) to rotate via gear transmission to scrape off impurities from the surface of the pressure sensor (120).

2. The downhole fault monitoring device for oil wells according to claim 1, characterized in that: The cylinder (110) includes an outer cylinder (111) and an inner cylinder (112) that are fixedly connected. The two ends of the outer cylinder (111) are connected to the flanges of the pipe body (001), and the inner cylinder (112) is connected to the pipe body (001). The outer cylinder (111) and the inner cylinder (112) form an annular cavity (101). The pressure sensor (120) is installed in the cavity (101) and is tangent to the inner wall of the inner cylinder (112).

3. The downhole fault monitoring device for oil wells according to claim 2, characterized in that: The scraping mechanism (200) includes a rotating frame (210) and a scraping unit (220); the rotating frame (210) is rotatably connected to the inner cylinder (112) and powered by the driving mechanism (300); the scraping unit (220) is mounted on the rotating frame (210) and includes a scraper (222); the scraper (222) scrapes the inner wall of the inner cylinder (112) as the rotating frame (210) rotates.

4. The downhole fault monitoring device for oil wells according to claim 3, characterized in that: The scraping unit (220) also includes a rotating shaft (221); the rotating shaft (221) is inserted into the rotating frame (210), and the scraper (222) is installed on the rotating shaft (221) and is tangent to the inner wall of the inner cylinder (112); the rotation of the rotating frame (210) can drive the scraper (222) to scrape the inner wall of the inner cylinder (112).

5. The downhole fault monitoring device for oil wells according to claim 4, characterized in that: The rotating frame (210) includes a rotating gear ring (211) and a connecting frame (212); the rotating gear ring (211) is rotatably connected to the inner cylinder (112), the connecting frame (212) is installed inside the rotating gear ring (211), and the rotating shaft (221) is inserted into the connecting frame (212).

6. The downhole fault monitoring device for oil wells according to claim 5, characterized in that: The scraping unit (220) further includes a first gear (223), which is sleeved on the rotating shaft (221) and abuts against the connecting frame (212); the scraping mechanism (200) further includes a fixed gear ring (224), which is fixedly installed on the outer cylinder (111). The inner circle of the fixed gear ring (224) is provided with inner gear teeth, which mesh with the first gear (223); the rotating shaft (221) is rotatably connected to the connecting frame (212), and a plurality of scraper blades (222) are evenly distributed around the axis of the rotating shaft (221); the rotation of the connecting frame (212) around the inner cylinder (112) can drive the scraper blades (222) to rotate in the opposite direction around the rotating shaft (221).

7. The downhole fault monitoring device for oil wells according to claim 5, characterized in that: The drive mechanism (300) includes a motor (310) and a transmission assembly (320). The motor (310) is mounted on the outer cylinder (111). One end of the transmission assembly (320) is connected to the motor (310), and the other end is connected to the rotating gear ring (211), which is used to transmit the power of the motor (310) to the rotating gear ring (211).

8. The downhole fault monitoring device for oil wells according to claim 7, characterized in that: The transmission assembly (320) includes a transmission shaft (321), a second gear (322), a worm gear (323), and a worm (324); the transmission shaft (321) is rotatably connected to the outer cylinder (111), and the second gear (322) and the worm gear (323) are both sleeved on the transmission shaft (321); the worm (324) is installed at the output end of the motor (310) and meshes with the worm gear (323); the outer circle of the rotating gear ring (211) is provided with outer gear teeth, and the outer gear teeth mesh with the second gear (322).

9. The downhole fault monitoring device for oil wells according to claim 3, characterized in that: The multiple scraping units (220) are evenly distributed around the axis of the rotating frame (210).

10. The downhole fault monitoring device for oil wells according to claim 5, characterized in that: The two rotating frames (210) are rotatably connected to both ends of the inner cylinder (112); the rotating shaft (221) is simultaneously inserted into the two connecting frames (212), and the scraper (222) is located between the two connecting frames (212).

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