Intelligent desulfurization tools
Through the design of intelligent sulfur removal tools, combined with camera recognition and intelligent control mode of scraping sleeve clamping blocks, the problem of difficult sulfur deposition in high-sulfur gas fields is solved, and the efficient and low-cost sulfur removal effect is achieved.
Patent Information
- Application Number
- CN202510577488.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-06
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2045-05-06
AI Technical Summary
During the development of high sulfur-containing gas fields, traditional sulfur removal technology has low efficiency, high maintenance costs, and is difficult to effectively remove sulfur deposition, especially in complex operating conditions, resulting in a decrease in gas well production capacity and an increase in safety risks.
An intelligent sulfur removal tool is designed, including a shell, clamping module, scraping module and intelligent drive module. It adopts an intelligent control mode to identify the sulfur deposition type through the camera, and combines the scraping sleeve and clamping block to achieve accurate processing of different sulfur depositions.
The sulfur removal operation is achieved with a small reduction in production during the gas well production process, which improves sulfur removal efficiency, reduces maintenance costs, and effectively removes different types of sulfur deposition.
Smart Images
Figure CN120159350B_ABST
Abstract
Description
Technical Field
[0001] The invention discloses a tool used in the technical field of high-sulfur gas field development, and particularly relates to an intelligent desulfurization tool. Background Art
[0002] During the development of high-sulfur gas fields, hydrogen sulfide poses a severe challenge to the production system. The electrochemical corrosion mechanism in the aqueous environment significantly accelerates the failure of the tubing material, and its highly toxic properties pose a significant risk to operators and the surrounding environment. As gas field development enters the middle and late stages, the continuous decay of the formation pressure system triggers a change in phase equilibrium, causing dissolved sulfur to precipitate as elemental sulfur and gradually deposit to form a dense sulfur scale layer. This causes the pipe flow cross-section to shrink, directly affecting the gas well's production capacity. Its uneven distribution characteristics exacerbate the risk of local erosion. When the sulfur scale thickness reaches a critical value, it may induce blockage of the entire wellbore cross-section, ultimately leading to production suspension. This series of chain reactions not only significantly increases the cost of gas field development, but also places higher demands on safety management throughout the entire life cycle.
[0003] Traditional desulfurization technology faces multiple challenges. Chemical sulfur dissolving agents are prone to secondary pollution and serious corrosion to rubber seals. Mechanical scrapers are prone to drill jams and are difficult to remove deep sulfur scale. The combination of the two still has problems of low processing efficiency and high maintenance costs under complex working conditions. Therefore, it is urgent to develop efficient and reliable desulfurization tools. Summary of the Invention
[0004] To solve the above problems, the present invention adopts a technical solution: the intelligent desulfurization tool can be divided into four parts: a shell part, a clamping module, a scraping module and an intelligent driving module; the shell part of the intelligent desulfurization tool includes an upper joint, an upper shell, a middle shell, a lower shell, a ventilation shaft and a bottom block, the upper joint is connected to the upper shell by a thread, the upper shell is connected to the middle shell by a thread, the middle shell is connected to the lower shell by a thread, the lower shell is connected to the ventilation shaft by a thread, and the ventilation shaft is connected to the bottom block by a thread;
[0005] The clamping module of the intelligent desulfurization tool includes a screw A, a screw nut A, and a clamping block. The screw A is limited to the upper shell and the middle shell by bearings and bearing retaining rings. The lower end of the screw A is connected to the motor A through a coupling. The screw nut A and the screw A realize helical transmission through threads. The sliding block of the clamping block cooperates with the sliding track of the screw nut A. The clamping block is axially limited by the step window of the upper shell.
[0006] The intelligent driving module of the intelligent desulfurization tool includes motor A, motor B, an enabling unit, motor C, an LED, and a camera. The enabling unit is fixed in the intelligent driving cavity between the lower part of the middle shell and the upper part of the lower shell by screws. Motor A is connected to the boss in the middle of the middle shell by bolts. Motor B and motor C are connected to the boss in the middle of the lower shell by bolts. The LED and the camera are fixed inside the lower shell by screws. Three LEDs and cameras are evenly distributed around the circumference. The enabling unit includes an IMU, an MCU, a motor driving circuit, a communication and interaction circuit, and is integrated into a PCB. The IMU can detect the acceleration signal of the intelligent desulfurization tool and transmit it to the MCU via I2C communication. Under the action of the LED, the camera identifies the type of sulfur deposits on the inner wall of the oil pipe, transmits the image data to the MCU, and compares it with the set threshold through an internal algorithm to determine whether the sulfur deposits are difficult to desulfurize or easy to desulfurize.
[0007] The scraping module of the intelligent desulfurization tool includes a screw B, a drive shaft, a gear, a rack, a screw nut B, a push-out block, a connecting rod, a slider, and a scraping sleeve. The upper end of the screw B is connected to the motor B through a coupling, and the screw B is limited by bearings and bearing retaining rings with the middle shell and the bottom block. The upper end of the drive shaft is connected to the motor C through a coupling, and the lower end of the drive shaft is axially fixed to the gear through a flat key. The rack cooperates with the sliding track on the push-out block through the sliding block, and the screw B and the screw nut B realize helical transmission through threads. The slider and the ventilation shaft are clearance-fitted, and the slider can slide axially on the ventilation shaft. The slider and the screw nut B are connected together through threads at both ends of the connecting rod, and cooperate with the push-out block through the upper slider and the sliding track at the lower part of the lower shell. The scraping sleeve is sleeved on the outside of the push-out block through the groove in the middle of the push-out block, and the inside of the scraping sleeve is bonded to the screw nut B and the slider through a special adhesive. The outside of the scraping sleeve has serrated teeth for scraping.
[0008] As a further technical solution of the present invention, the upper part of the upper joint is a wedge-shaped joint, which can be reliably fixed with the end of the wire rope. Two layers of step windows are opened in the middle of the upper shell, and each layer of step windows has 3 evenly distributed around the circumference. The two layers of windows are staggered at 40 degrees, which are used to limit the axial position of the clamping block and provide support for its radial movement. The cavity formed by the cooperation between the lower part of the upper shell and the upper part of the middle shell is used to place the clamping module, and the cavity formed by the lower part of the middle shell and the upper part of the lower shell is used to place the intelligent drive module. The cavity formed by the lower part of the lower shell, the ventilation shaft and the bottom block is used to place the scraping module. The eccentric positions of the upper joint, upper shell and middle shell all have circuit holes similar to those of the upper shell, and the intelligent drive module can be powered through the circuit holes.
[0009] As a further technical solution of the present invention, two screw nuts A are arranged, and three sliding tracks are evenly distributed around the circumference. The clamping block can slide on the screw nut through the internal sliding block. Each screw nut A is arranged with three clamping blocks, and the outside of the clamping block is serrated teeth.
[0010] As a further technical solution of the present invention, when the clamping module is working, it provides a stable and reliable anchoring force to the tool, reduces the shaking of the tool, and enables the tool to provide a more stable scraping force, creating better working conditions for the desulfurization work of the scraping module.
[0011] As a further technical solution of the present invention, the motor A, motor B, and motor C are all stepper motors that can rotate forward and reverse. The number of revolutions of different motors controlled by the MCU is calculated based on the inner diameter of the oil pipe, tool parameters, and motor parameters.
[0012] As a further technical solution of the present invention, the external materials of the present invention are all made of TC4 hydrogen sulfide resistant material, and the scraping sleeve is a special rubber material. In order to avoid scratching the oil pipe coating, the present invention meets the following conditions: the hardness of the oil pipe coating material > the hardness of the clamping block, the hardness of the oil pipe coating material > the hardness of the scraping sleeve after stretching > the sulfur deposition hardness.
[0013] As a further technical solution of the present invention, the scraper sleeve has a tiny gap from the inner diameter of the oil pipe during desulfurization operation, which blocks part of the gas flow path and hinders the production of the gas well. The present invention forms a new gas flow path by arranging a ventilation shaft and a ventilation soft, so that the tool can greatly alleviate the blockage of the flow path. Therefore, the tool can perform desulfurization operation during production, that is, with a small reduction in production.
[0014] Compared with the prior art, the present invention has the following advantages: (1) Compared with other desulfurization tools, the invention is innovative in that it has two working modes for different types of sulfur deposits, and can achieve secondary desulfurization for sulfur deposits that have not been removed completely; (2) the invention adopts an intelligent control mode and is easy to operate; (3) the invention can perform desulfurization operations during production, that is, with a small reduction in production, by setting up a new gas flow channel. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a schematic diagram of the intelligent desulfurization tool of the present invention;
[0016] Figure 2 for Figure 1 AA section view;
[0017] Figure 3 for Figure 1 BB section view;
[0018] Figure 4 for Figure 1 Schematic diagram of screw nut A and clamping block;
[0019] Figure 5 for Figure 1 Push out block schematic;
[0020] Figure 6 is a partial circuit diagram of the intelligent control module;
[0021] Figure 7 This is the intelligent control flow chart of the present invention;
[0022] In the figure: 1-upper joint, 2-upper shell, 201-circuit hole, 202-step window, 3-screw A, 4-screw nut A, 401-sliding rail, 5-clamping block, 501-sliding block, 6-middle shell, 7-coupling, 8-motor A, 9-motor B, 10-enabling unit, 11-screw B, 12-motor C, 13-LED, 14-drive shaft, 15-camera, 16-ventilation hose, 17-gear, 18-lower shell, 19-rack, 1901-sliding block, 20-ventilation shaft, 21-screw nut B, 22 ejection block, 23-connecting rod, 24-slider, 25-scraping sleeve, 26 bottom block. DETAILED DESCRIPTION
[0023] The present invention will be further described below with reference to the accompanying drawings. The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative efforts shall fall within the scope of protection of the present invention.
[0024] See attached Figure 1 The technical solution of the present invention is: the intelligent desulfurization tool can be divided into four parts: a shell part, a clamping module, a scraping module and an intelligent driving module; the shell part of the intelligent desulfurization tool includes an upper joint 1, an upper shell 2, a middle shell 6, a lower shell 18, a ventilation shaft 20, and a bottom block 26. The upper joint 1 is connected to the upper shell 2 by threads, the upper shell 2 is connected to the middle shell 6 by threads, the middle shell 6 is connected to the lower shell 18 by threads, the lower shell 18 is connected to the ventilation shaft 20 by threads, and the ventilation shaft 20 is connected to the bottom block 26 by threads.
[0025] See attached Figure 1 、 2 The clamping module of the intelligent desulfurization tool includes a screw A3, a screw nut A4, and a clamping block 5. The screw A3 is limited to the upper shell 2 and the middle shell 6 by bearings and bearing retaining rings. The lower end of the screw A3 is connected to the motor A8 through a coupling 7. The screw nut A4 and the screw A3 realize spiral transmission through threads. The 501 sliding block 501 of the clamping block 5 cooperates with the sliding track 401 of the screw nut A4, and the clamping block 5 is axially limited by the step window 202 of the upper shell 2.
[0026] See attached Figure 1The intelligent driving module of the intelligent desulfurization tool includes motor A 8, motor B 9, an enabling unit 10, motor C 12, LED 13, and a camera 15. The enabling unit 10 is fixed in the intelligent driving cavity between the lower part of the middle shell 6 and the upper part of the lower shell 18 by screws. Motor A 8 is connected to the boss in the middle of the middle shell 6 by bolts. Motor B 9 and motor C 12 are connected to the boss in the middle of the lower shell 18 by bolts. LED 13 and camera 15 are fixed inside the lower shell 18 by screws. Three LEDs 13 and cameras 15 are evenly distributed around the circumference. The enabling unit 10 includes an IMU, an MCU, a motor driving circuit, a communication and interaction circuit, and is integrated into a PCB. The IMU can detect the acceleration signal of the intelligent desulfurization tool and transmit it to the MCU through I2C communication. Under the action of LED 13, the camera 15 identifies the type of sulfur deposits on the inner wall of the oil pipe, transmits the image data to the MCU, and compares it with the set threshold through an internal algorithm to determine whether the sulfur deposits are difficult to desulfurize or easy to desulfurize.
[0027] See attached Figure 1 、 3 The scraping module of the intelligent desulfurization tool includes a screw B11, a drive shaft 14, a gear 17, a rack 19, a screw nut B21, a push-out block 22, a connecting rod 23, a slider 24, and a scraping sleeve 25. The upper end of the screw B11 is connected to the motor B9 through a coupling, and the screw B11 is limited by the middle housing 18 and the bottom block 26 through bearings and bearing retaining rings. The upper end of the drive shaft 14 is connected to the motor C12 through a coupling, and the lower end of the drive shaft 14 is axially fixed to the gear 17 through a flat key. The rack 19 cooperates with the sliding track on the push-out block 22 through the sliding block 1901. The screw B11 and the screw nut B21 realize spiral transmission through threads. The slider 24 and the ventilation shaft 20 are clearance-matched. The slider 24 can slide axially on the ventilation shaft 20. The slider 24 and the screw nut B 21 are connected together through threads at both ends of the connecting rod 23, the push-out block 22 cooperates with the sliding track at the lower part of the lower shell 18 through the upper slider, the scraping sleeve 25 is sleeved on the outside of the push-out block 22 through the groove in the middle of the push-out block 22, the inside of the scraping sleeve 25 is bonded to the screw nut B 21 and the slider 24 through a special adhesive, and the outside of the scraping sleeve 25 has serrated teeth for scraping.
[0028] Preferably, see the attached Figure 1As shown, the upper part of the upper joint 1 is a wedge-shaped joint, which can be reliably fixed with the end of the wire rope. Two layers of step windows 202 are opened in the middle of the upper shell 2, and each layer of step windows has 3 evenly distributed around the circumference. The two layers of windows are staggered at 40 degrees, which are used to limit the axial position of the clamping block and provide support for its radial movement. The cavity formed by the cooperation between the lower part of the upper shell 2 and the upper part of the middle shell 6 is used to place the clamping module, and the cavity formed by the lower part of the middle shell 6 and the upper part of the lower shell 18 is used to place the intelligent drive module. The cavity formed by the lower part of the lower shell 18, the ventilation shaft 20 and the bottom block 26 is used to place the scraping module. The eccentric positions of the upper joint 1, the upper shell 2 and the middle shell 6 all have the same circuit holes 201 as the upper shell 2, and the intelligent drive module can be powered through the circuit holes.
[0029] Preferably, see the attached Figure 1 、 2 Two screw nuts A 4 are arranged, and three sliding tracks 401 are evenly distributed around the circumference. The clamping block 5 can slide on the screw nut through the internal sliding block 501. Three clamping blocks 5 are arranged on each screw nut A 4, and the outside of the clamping block 5 is serrated.
[0030] Preferably, see the attached Figure 1 、 4 When the clamping module is working, it provides a stable and reliable anchoring force to the tool, reduces the shaking of the tool, enables the tool to provide a more stable scraping force, and creates better working conditions for the desulfurization work of the scraping module.
[0031] Preferably, see the attached Figure 1 Motor A 8, motor B 9, and motor C 12 are all stepper motors that can rotate forward and reverse. The number of revolutions controlled by the MCU for different motors is calculated based on the inner diameter of the oil pipe, tool parameters, and motor parameters.
[0032] Preferably, the external materials of the present invention are all made of TC4 hydrogen sulfide resistant material, and the scraping sleeve 25 is a special rubber material. In order to avoid scratching the oil pipe coating, the present invention satisfies the following conditions: the hardness of the oil pipe coating material > the hardness of the clamping block 5, the hardness of the oil pipe coating material > the hardness of the scraping sleeve 25 after stretching > the sulfur deposition hardness.
[0033] Preferably, see the attached Figure 1 When performing desulfurization operations, the scraping sleeve has a tiny gap from the inner diameter of the oil pipe, which blocks part of the gas flow path and hinders the production of the gas well. The present invention forms a new gas flow path by arranging the ventilation shaft 20 and the ventilation soft 16, so that the tool can greatly alleviate the blockage of the flow path. Therefore, the tool can perform desulfurization operations during production, that is, with a small reduction in production.
[0034] In a specific embodiment, the intelligent desulfurization tool is lowered to the working position by a steel wire rope and a cable. When the IMU in the enabling unit 10 detects that the tool acceleration is within the threshold, it is transmitted to the MCU through I2C communication, so that the LED 13 and the camera 15 start working. The camera 15 identifies the type of sulfur deposits on the inner wall of the oil pipe, transmits the image data to the MCU, and compares it with the set threshold through an internal algorithm to determine whether the sulfur deposits are difficult to remove or easy to remove. If it is easy to remove, the MCU controls the scraping module to work, that is, the MCU controls the motor C 12 to rotate forward, drives the gear 17 and the rack 19 through the drive shaft 14, so that the push-out block 22 opens the scraping sleeve 25 until there is a small gap with the inner wall of the oil pipe, and the MCU controls the motor C 12 to stop rotating, and then controls the motor B 9 to rotate forward, and the screw transmission composed of the screw B 11 and the screw nut B 21, the screw nut B 21 and the slider 24 move downward synchronously under the action of the connecting rod 23, driving the scraping sleeve 25 to perform scraping and desulfurization operations. After 21 reaches the maximum stroke, MCU controls motor B 9 to stop rotating, and then controls motor C 12 to reverse, and the ejection block is retracted until it returns to the initial state. At this time, MCU controls motor B 9 to reverse, and the screw nut B 21 and the slider 24 move axially upward synchronously until the scraping sleeve 25 is driven back to the initial state. At this time, MCU controls LED 13 and camera 15 to work, and identify the state of sulfur deposition on the inner wall of the oil pipe again and compare it with the last identification result. If the ideal effect is not achieved, the above desulfurization process is repeated. If the ideal effect is achieved, MCU transmits the corresponding signal to the ground and continues to lower the tool to perform desulfurization work in the next well section. If desulfurization is difficult, MCU first controls the clamping module to work, that is, MCU controls motor A 8 to rotate forward, and screw nut A 4 is rotated through screw A 3 moves downward in the axial direction, thereby causing the clamping block 5 to move radially until it is clamped on the inner wall of the oil pipe. The MCU then controls the scraping module to work, that is, the above-mentioned easy desulfurization working process. When the clamping module is working, it can provide a stable and reliable anchoring force to the tool, reduce the shaking of the tool, and enable the tool to provide a more stable scraping force, creating better working conditions for the desulfurization work of the scraping module and effectively removing more stubborn sulfur deposits.
[0035] The above embodiments are only a part of the present invention, not all of it. Based on these embodiments, other embodiments obtained by ordinary technicians in this field without creative work are also within the scope of protection of the present invention.
Claims
1. Intelligent desulfurization tool, characterized by: The tool consists of four parts: housing, clamping module, intelligent drive module and scraping module; The shell part includes an upper joint, an upper shell, a middle shell, a lower shell, a ventilation shaft, and a bottom block. The upper joint is connected to the upper shell by threads, the upper shell is connected to the middle shell by threads, the middle shell is connected to the lower shell by threads, the lower shell is connected to the ventilation shaft by threads, and the ventilation shaft is connected to the bottom block by threads. The clamping module includes a screw A, a screw nut A, and a clamping block. The screw A is limited to the upper and middle housings by bearings and bearing retaining rings. The lower end of the screw A is connected to the motor A through a coupling. The screw nut A and the screw A realize helical transmission through threads. The sliding block of the clamping block cooperates with the sliding track of the screw nut A. The clamping block is axially limited by the step window of the upper housing. The intelligent drive module includes motor A, motor B, an enabling unit, motor C, an LED, and a camera. The enabling unit is fixed to the intelligent drive cavity between the lower part of the middle shell and the upper part of the lower shell by screws. Motor A is connected to the boss in the middle of the middle shell by bolts. Motor B and motor C are connected to the boss in the middle of the lower shell by bolts. The LED and camera are fixed to the inside of the lower shell by screws. Three LEDs and cameras are evenly distributed around the circumference. The enabling unit includes an IMU, an MCU, a motor drive circuit, and a communication and interaction circuit, which are integrated into a PCB. The IMU detects the acceleration signal of the intelligent desulfurization tool and transmits it to the MCU via I2C communication. Under the action of the LED, the camera identifies the type of sulfur deposits on the inner wall of the oil pipe, transmits the image data to the MCU, and compares it with the set threshold through an internal algorithm to determine whether the sulfur deposits are difficult or easy to desulfurize. The scraping module includes a screw B, a drive shaft, a gear, a rack, a screw nut B, a push-out block, a connecting rod, a slider, and a scraping sleeve. The upper end of the screw B is connected to the motor B through a coupling, and the screw B is limited to the middle shell and the bottom block by bearings and bearing retaining rings. The upper end of the drive shaft is connected to the motor C through a coupling, and the lower end of the drive shaft is axially fixed to the gear through a flat key. The rack cooperates with the sliding track on the push-out block through the sliding block, and the screw B and the screw nut B realize spiral transmission through threads. The slider and the ventilation shaft are clearance-fitted, and the slider and the screw nut B are connected together through threads at both ends of the connecting rod. The push-out block cooperates with the sliding track at the bottom of the lower shell through the upper slider, and the scraping sleeve is sleeved on the outside of the push-out block through the groove in the middle of the push-out block. The inside of the scraping sleeve is bonded to the screw nut B and the slider through an adhesive.
2. The intelligent desulfurization tool according to claim 1, characterized in that: The upper part of the upper joint is a wedge-shaped joint, which is fixed to the end of the wire rope. Two layers of step windows are opened in the middle of the upper shell, and each layer of step windows has 3 evenly distributed around the circumference. The two layers of windows are staggered at 40 degrees, which are used to limit the axial position of the clamping block and provide support for its radial movement. The cavity formed by the cooperation between the lower part of the upper shell and the upper part of the middle shell is used to place the clamping module, and the cavity formed by the lower part of the middle shell and the upper part of the lower shell is used to place the intelligent drive module. The cavity formed by the lower part of the lower shell, the ventilation shaft and the bottom block is used to place the scraping module. The upper joint, upper shell and middle shell all have circuit holes at the eccentric position, and the intelligent drive module can be powered through the circuit holes.
3. The intelligent desulfurization tool according to claim 1, characterized in that: The clamping module has three oblique sliding tracks evenly distributed around the circumference of the screw nut A, each track is matched with a clamping block, and the two screw nuts A are axially staggered by 40 degrees.
4. The intelligent desulfurization tool according to claim 1, characterized in that: The scraping sleeve is expanded to a diameter slightly smaller than the inner diameter of the oil pipe under the action of motor C, and moves axially downward under the action of motor B to perform desulfurization operation.
5. The intelligent desulfurization tool according to claim 1, characterized in that: When the scraping sleeve is performing desulfurization operation, there is a small gap between the scraping sleeve and the inner diameter of the oil pipe, and a new gas flow channel is formed by arranging the ventilation shaft and the ventilation hose.
Citation Information
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