Petroleum water injection wellhead logging field detector

Abstract

The invention relates to the technical field of oil well detection, in particular to a petroleum water injection wellhead logging on-site detector which comprises two bearing tables, walking mechanisms are arranged at the lower ends of the bearing tables, the two bearing tables are connected through a connecting mechanism, a moving mechanism is arranged at the upper ends of the bearing tables, two sliding blocks are installed on the moving mechanism, and the two sliding blocks are connected through a connecting mechanism. Lifting mechanisms are arranged at the upper ends of the sliding blocks, clamping structures are installed at the upper ends of the lifting mechanisms, and winding equipment is clamped between the clamping mechanisms. The device can fully adapt to oil wells of different specifications and sizes and fully meet the detection requirements of the oil wells of different sizes, can achieve accurate adjustment of detection equipment, guarantees the stability and accuracy of detection lowering, can achieve flexible movement, meanwhile, assists in transferring or bearing other pipelines when detection is not carried out, and improves the detection efficiency. The universality is improved, the detection sufficiency and stability are greatly improved, the standard exceeding of hazardous gas can be prompted in real time, and the safety of field personnel is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of oil well detection, in particular to a field detector for logging at a petroleum water injection wellhead. Background Art

[0002] In the process of oil exploration and development, logging is an important link following geological exploration and geophysical exploration. It provides important information support for subsequent logging, cementing, completion and other links. Logging technology is the most basic technology in oil and gas exploration and development activities, and is the most timely and direct means of discovering and evaluating oil and gas reservoirs. It has the characteristics of timely and diverse acquisition of underground information, as well as fast analysis and interpretation. Logging personnel will interpret and locate lithology based on comprehensive on-site geological data, on-site logging data and comprehensive analysis and testing data, determine the oil, gas and water production conditions, and draw different types of logging maps.

[0003] During the logging process at the oil injection wellhead, a gas detector is usually used to detect gas on site. However, due to the deep oil wells, it is difficult to detect gas at various locations of the oil wells. Therefore, we propose an on-site detector for logging at the oil injection wellhead to solve the above problem. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a field detector for logging at the head of a petroleum water injection well.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A field detector for logging at the head of a petroleum water injection well comprises two bearing platforms, wherein a walking mechanism is arranged at the lower end of the bearing platforms, the two bearing platforms are connected by a connecting mechanism, a moving mechanism is arranged at the upper end of the bearing platforms, two sliders are mounted on the moving mechanism, a lifting mechanism is arranged at the upper end of the sliders, a clamping structure is mounted at the upper end of the lifting mechanism, a hoisting device is clamped between the clamping mechanisms, a detection structure is connected to the lower end of the hoisting device, and a supporting mechanism is arranged on one side of the bearing platform.

[0006] Preferably, the walking mechanism comprises fixing members fixed on both sides of the lower end of the supporting platform, and rollers are rotatably connected to the fixing members.

[0007] Preferably, the moving mechanism includes a reduction device installed on one side of the upper end of the supporting platform, the upper end of the reduction device is connected to a servo motor, the upper end of the supporting platform is provided with a slide groove, one end of the reduction device is connected to a screw rod, one end of the screw rod is rotatably connected to one side in the slide groove, and two sliders are threadedly screwed on the screw rod.

[0008] Preferably, the connection mechanism comprises a stud penetrating between the two bearing platforms, and four nuts are threadedly screwed on the stud, and two nuts on the same side respectively abut against two sides of the two bearing platforms.

[0009] Preferably, the lifting mechanism includes two support columns fixed to the upper end of the slider, a bearing frame is commonly fixed to the upper ends of the two support columns, a movable groove is provided in the bearing frame, a movable plate is commonly clamped in the two movable grooves, a first hydraulic cylinder is installed at the upper end of the slider, and the end of the piston rod of the first hydraulic cylinder is fixed to the lower end of the movable plate.

[0010] Preferably, the clamping structure comprises vertical plates fixed on both sides of the upper end of the movable plate, and a clamping block is fixed on one side of the upper end of the vertical plates.

[0011] Preferably, the hoisting device comprises a protection box clamped between four clamping blocks, a hoist is installed in the protection box, a traction rope is wound around the hoist, and the traction rope passes through the side wall of the protection box and extends to the lower end of the protection box.

[0012] Preferably, the detection structure comprises a connecting ring connected to the lower end of the traction rope, a protection block is fixed to the lower end of the connecting ring, mounting grooves are provided on both sides of the protection block, and a gas detector is installed in the mounting groove.

[0013] Preferably, the supporting mechanism includes a mounting plate fixed on one side of the supporting platform, a second hydraulic cylinder is installed on the upper end of the mounting plate, a piston rod of the second hydraulic cylinder passes through the mounting plate and extends to the lower end of the mounting plate, a supporting plate is fixed to the end of the piston rod of the second hydraulic cylinder, and eight plug rods are connected to the lower end of the supporting plate at equal intervals.

[0014] Preferably, the gas detector comprises a hydrogen sulfide sensor and a carbon monoxide sensor, a well depth sensor and a pressure sensor are installed in the installation groove, and a tungsten carbide aluminum oxide composite coating is provided on a peripheral side wall of the protection block.

[0015] In the present invention, when it is necessary to detect gas in an oil well, the entire device is moved to the upper end of the oil well by using rollers, and the distance between the stud and the nut is adjusted according to the diameter of the oil well for full adaptation. The second hydraulic cylinder drives the insertion rod to be inserted into the ground on both sides through the descent of the piston rod to achieve firm and stable support. The servo motor drives the reduction device to rotate through the rotation of the output shaft, thereby realizing the rotation of the screw. As the screw rotates, the two sliders are driven to move to one side at the same time, so that the detection device is accurately aligned with the oil well mouth. Thereafter, the lifting mechanism is adjusted through lifting to make it more fully and stably aligned. The winch controls the traction rope to drive the detection device to descend, and sufficient gas detection is performed on various positions in the oil well. When the detection equipment is not in use, the protection box can be disassembled, and the entire device can assist in the operation of pipelines or other objects that need to be loaded.

[0016] The present invention combines infrared and electrochemical technologies to detect non-hydrocarbon gases (such as CO2, H2, H2S, etc.) associated with water injection wellheads, monitors concentrations in real time through sensors, and outputs data to the logging system through a controller. It integrates the real-time collection function of drilling engineering parameters (such as well depth, pump pressure, flow rate, etc.), and supports drilling safety and efficiency optimization through sensors (such as well depth sensors, pressure sensors) and PLC controllers working in coordination.

[0017] The present invention has the following advantages: 1. Through the setting of the connecting mechanism and the lifting mechanism, it can fully adapt to oil wells of different sizes and fully meet the detection needs of oil wells of various sizes; 2. Through the combination of lifting mechanism and moving mechanism, the detection equipment can be accurately adjusted to ensure the stability and accuracy of detection and lowering; 3. The walking mechanism combined with the connection of the entire frame can achieve flexible movement, and at the same time, it can assist in the transportation or carrying of other pipelines when not inspected, thus improving versatility; 4. Through the setting of the supporting mechanism, stable support can be ensured during detection, which improves firmness and stability; 5. Through the built-in hydrogen sulfide sensor and carbon monoxide sensor, combined with warning lights and sound and light alarm devices, real-time prompts of dangerous gas exceeding the standard are given to ensure the safety of on-site personnel; 6. The detection data is transmitted to the remote terminal in real time through the signal transceiver, supporting the collaborative work of multiple teams of Party A and Party B to achieve integrated geological engineering decision-making. The intelligent collection system supports sensor self-diagnosis, and abnormal data automatically generates a "forecast notice" and pushes it to relevant parties.

[0018] To sum up, the present invention can not only fully adapt to oil wells of different specifications and sizes and fully meet the detection needs of oil wells of all sizes, but also realize precise adjustment of the detection equipment to ensure the stability and accuracy of the detection. In addition, it can realize flexible movement and perform auxiliary transportation or carrying of other pipelines when not detecting, thereby improving the versatility and greatly improving the adequacy and stability of detection. It can also provide real-time prompts of dangerous gas exceeding the standard to ensure the safety of on-site personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the present invention; Figure 2 This is a structural diagram of the present invention without installing the hoisting device; Figure 3 This is a structural diagram of the load-bearing pipeline of the present invention; Figure 4 It is a detection structure diagram of the present invention; Figure 5It is a structural diagram of the support mechanism of the present invention; Figure 6 for Figure 2 A magnified view of the structure at A; Figure 7 The structural diagram of the tungsten carbide aluminum oxide composite coating of the present invention is provided.

[0020] In the figure: 1 vertical plate, 2 moving plate, 3 first hydraulic cylinder, 4 clamping block, 5 moving groove, 6 bearing frame, 7 support column, 8 second hydraulic cylinder, 9 plug rod, 10 mounting plate, 11 slider, 12 screw rod, 13 slide groove, 14 bearing platform, 15 stud, 16 roller, 17 nut, 18 protection box, 19 connecting ring, 20 protection block, 21 gas detector, 22 mounting groove, 23 support plate, 24 servo motor, 25 reduction device, 26 traction rope, 27 tungsten carbide aluminum oxide composite coating. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] Reference Figure 1-7 A field detector for logging at the wellhead of oil water injection includes two bearing platforms 14. A walking mechanism is provided at the lower end of the bearing platform 14. The walking mechanism includes fixing members fixed on both sides of the lower end of the bearing platform 14. Rollers 16 are rotatably connected to the fixing members, so as to realize flexible movement and improve the convenience of movement. The two bearing platforms 14 are connected by a connecting mechanism, which includes a stud 15 that runs through the two bearing platforms 14, and four nuts 17 are screwed on the stud 15. The two nuts 17 on the same side are respectively against the two sides of the two bearing platforms 14. Through the screwing of the nuts 17 and the stud 15, the position can be adjusted to fully adapt to oil wells of different sizes and fully meet the detection needs of oil wells of various sizes. The upper end of the carrier 14 is provided with a moving mechanism, which includes a reduction device 25 installed on one side of the upper end of the carrier 14, the upper end of the reduction device 25 is connected to a servo motor 24, the upper end of the carrier 14 is provided with a slide 13, one end of the reduction device 25 is connected to a screw 12, one end of the screw 12 is rotatably connected to one side of the slide 13, two sliders 11 are screwed on the screw 12, and the stable movement of the two sliders 11 is achieved by the rotation of the screw 12, thereby ensuring the precise adjustment of the detection device; Two sliders 11 are installed on the moving mechanism, and a lifting mechanism is provided at the upper end of the slider 11. The lifting mechanism includes two support columns 7 fixed at the upper end of the slider 11, and a bearing frame 6 is fixed to the upper ends of the two support columns 7. A moving groove 5 is provided in the bearing frame 6, and a moving plate 2 is clamped in the two moving grooves 5. A first hydraulic cylinder 3 is installed at the upper end of the slider 11, and the end of the piston rod of the first hydraulic cylinder 3 is fixed at the lower end of the moving plate 2, which can be stably lifted and fully supported. Multiple first hydraulic cylinders 3 are controlled by a synchronous control system to achieve stable synchronous movement; A clamping structure is installed at the upper end of the lifting mechanism, and the clamping structure includes a vertical plate 1 fixed on both sides of the upper end of the moving plate 2, and a clamping block 4 is fixed on one side of the upper end of the vertical plate 1, which can realize the stable installation of the hoisting equipment and ensure the firmness and stability of the installation; A hoisting device is clamped between the clamping mechanisms. The hoisting device includes a protection box 18 clamped between four clamping blocks 4. A hoisting machine is installed in the protection box 18. A traction rope 26 is wound on the hoisting machine. The traction rope 26 passes through the side wall of the protection box 18 and extends to the lower end of the protection box 18. The lifting height is between 10 meters and 100 meters, the load capacity is 1 ton, and the lifting speed is 5 meters / minute. The load, speed, temperature and other data are monitored in real time by sensors, and the operating state is automatically adjusted. Overload automatically limits the speed or stops. Wireless remote control or PLC integrated control is supported. It is equipped with incremental / absolute encoders, and the positioning accuracy reaches millimeter level. The electronic braking accuracy: the braking response time is ≤0.1 seconds. The loose rope alarm: the wire rope slack is detected by the travel switch and the automatic shutdown occurs. Fault self-diagnosis: abnormalities such as motor overheating and gear wear can be identified. The variable frequency motor power range is 7.5-400kW, and the energy-saving mode is supported. Regenerative braking: energy recovery efficiency is ≥30%; The lower end of the hoisting device is connected to a detection structure, which includes a connection ring 19 connected to the lower end of the traction rope 26. A protection block 20 is fixed to the lower end of the connection ring 19. Both sides of the protection block 20 are provided with mounting grooves 22. A gas detector 21 is installed in the mounting groove 22. The gas detector 21 includes the detection of total hydrocarbons, methane, ethane and other hydrocarbon gases, as well as the determination of organic geochemical parameters such as organic carbon content and hydrocarbon generation potential; A supporting mechanism is provided on one side of the supporting platform 14, and the supporting mechanism includes a mounting plate 10 fixed on one side of the supporting platform 14, and a second hydraulic cylinder 8 is installed on the upper end of the mounting plate 10, and the piston rod of the second hydraulic cylinder 8 penetrates the mounting plate 10 and extends to the lower end of the mounting plate 10, and a supporting plate 23 is fixed to the end of the piston rod of the second hydraulic cylinder 8, and eight plug rods 9 are evenly connected to the lower end of the support plate 23, and the plug rods 9 are firmly inserted into the ground on both sides to achieve stable and sufficient support, which greatly improves the support strength of the upper end.

[0023] The gas detector 21 includes a hydrogen sulfide sensor and a carbon monoxide sensor. A well depth sensor and a pressure sensor are installed in the installation groove 22. The concentration is monitored in real time through the sensor, and the data is output to the logging system through the controller. The real-time collection function of drilling engineering parameters (such as well depth, pump pressure, flow rate, etc.) is integrated. The sensors (such as well depth sensor, pressure sensor) work in coordination with the PLC controller to support drilling safety and efficiency optimization. The built-in hydrogen sulfide sensor and carbon monoxide sensor, combined with the warning light and the sound and light alarm device, can provide real-time prompts of dangerous gas exceeding the standard to ensure the safety of on-site personnel.

[0024] The detection data is transmitted to the remote terminal in real time through the signal transceiver, supporting the collaborative work of multiple teams of Party A and Party B to achieve integrated geological engineering decision-making. The intelligent collection system supports sensor self-diagnosis, and abnormal data automatically generates a "Forecast Notice" and pushes it to relevant parties.

[0025] The pressure sensor integrates a micro-power data acquisition system, supports 4-channel data synchronous processing, and is equipped with a linear voltage-regulated power supply management to reduce energy consumption. Its measuring range is 0-120MPa, and its comprehensive accuracy is ±0.1%FS to ±0.5%FS, which can meet the pressure measurement requirements of different layers of injection wells. In addition, it supports wireless transmission technology, which can avoid electromagnetic interference in the well site and ensure the integrity of the signal.

[0026] The surface of the protection block 20 is sprayed with a tungsten carbide aluminum oxide composite coating 27 (thickness 200μm), and a gradient structure is formed through a laser cladding process. The compressive strength reaches 80MPa, and the H2S corrosion resistance is improved by 5 times. Plasma spraying technology (APS) is used to deposit tungsten carbide (WC) and aluminum oxide (Al2O3) in layers to form a gradient transition layer. Tests show that the coating life is more than 12,000 hours, and the sand erosion resistance life is increased to 8,000 hours.

[0027] In the present invention, when it is necessary to detect gas in an oil well, the entire device is moved to the upper end of the oil well by using the roller 16, and the distance between the stud 15 and the nut 17 is adjusted according to the diameter of the oil well for full adaptation. The second hydraulic cylinder 8 drives the insertion rod 9 to be inserted into the ground on both sides through the descent of the piston rod to achieve firm and stable support. The servo motor 24 drives the reduction device 25 to rotate through the rotation of the output shaft, thereby realizing the rotation of the screw 12. As the screw 12 rotates, the two sliders 11 are driven to move to one side at the same time, so that the detection device is accurately aligned with the oil well mouth. After that, the lifting mechanism is adjusted through lifting to make it more fully and stably aligned. The winch controls the traction rope 26 to drive the detection device to descend, and sufficient gas detection is performed on various positions in the oil well. When the detection equipment is not in use, the protection box 18 can be disassembled, and the entire device can assist in the operation of pipelines or other objects that need to be loaded.

[0028] The detection system in the present invention can automatically generate standardized reports based on the detection data to meet the format requirements of different oil fields and improve work efficiency by more than 80%.

[0029] In addition, during the testing process, the following precautions should be taken: Detect corrosive gases (such as H2S) and pressure changes that may be generated during water injection to prevent pipe wall corrosion and wellhead leakage.

[0030] Combined with magnetic detection technology, it can quantitatively analyze defects such as surface cracks and wall thickness reduction of oil pipes, and assist in the scientific replacement of aging oil pipes.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A field detector for logging at the wellhead of oil injection wells, comprising two bearing platforms (14), characterized in that: A walking mechanism is provided at the lower end of the bearing platform (14); the two bearing platforms (14) are connected via a connecting mechanism; a moving mechanism is provided at the upper end of the bearing platform (14); two sliders (11) are mounted on the moving mechanism; a lifting mechanism is provided at the upper end of the sliders (11); a clamping structure is mounted at the upper end of the lifting mechanism; a hoisting device is clamped between the clamping mechanisms; a detection structure is connected to the lower end of the hoisting device; and a supporting mechanism is provided on one side of the bearing platform (14).

2. A petroleum water injection wellhead logging field detector according to claim 1, characterized in that: The walking mechanism comprises fixing members fixed to both sides of the lower end of the bearing platform (14), and rollers (16) are rotatably connected to the fixing members.

3. A petroleum water injection wellhead logging field detector according to claim 1, characterized in that: The moving mechanism comprises a reduction device (25) mounted on one side of the upper end of the support platform (14), the upper end of the reduction device (25) is connected to a servo motor (24), the upper end of the support platform (14) is provided with a slide groove (13), one end of the reduction device (25) is connected to a screw rod (12), one end of the screw rod (12) is rotatably connected to one side in the slide groove (13), and two sliders (11) are threadedly screwed on the screw rod (12).

4. A petroleum water injection wellhead logging field detector according to claim 1, characterized in that: The connection mechanism comprises a stud (15) penetrating between two bearing platforms (14), four nuts (17) being threadedly screwed onto the stud (15), and two nuts (17) on the same side respectively abutting against two sides of the two bearing platforms (14).

5. The oil water injection wellhead logging field detector according to claim 1, characterized in that: The lifting mechanism comprises two support columns (7) fixed to the upper end of a slide block (11); a bearing frame (6) is fixed to the upper ends of the two support columns (7); a moving groove (5) is provided in the bearing frame (6); a moving plate (2) is clamped in the two moving grooves (5); a first hydraulic cylinder (3) is installed at the upper end of the slide block (11); the end of the piston rod of the first hydraulic cylinder (3) is fixed to the lower end of the moving plate (2).

6. A petroleum water injection wellhead logging field detector according to claim 5, characterized in that: The clamping structure comprises vertical plates (1) fixed to both sides of the upper end of the movable plate (2), and a clamping block (4) is fixed to one side of the upper end of the vertical plate (1).

7. A petroleum water injection wellhead logging field detector according to claim 6, characterized in that: The hoisting device comprises a protection box (18) clamped between four clamping blocks (4), a hoisting machine is installed in the protection box (18), a traction rope (26) is wound around the hoisting machine, and the traction rope (26) passes through the side wall of the protection box (18) and extends to the lower end of the protection box (18).

8. The oil water injection wellhead logging field detector according to claim 7, characterized in that: The detection structure comprises a connection ring (19) connected to the lower end of a traction rope (26), a protection block (20) being fixed to the lower end of the connection ring (19), installation grooves (22) being provided on both sides of the protection block (20), and a gas detector (21) being installed in the installation groove (22).

9. The oil water injection wellhead logging field detector according to claim 1, characterized in that: The support mechanism comprises a mounting plate (10) fixed to one side of the support platform (14); a second hydraulic cylinder (8) is mounted on the upper end of the mounting plate (10); a piston rod of the second hydraulic cylinder (8) passes through the mounting plate (10) and extends to the lower end of the mounting plate (10); a support plate (23) is fixed to the end of the piston rod of the second hydraulic cylinder (8); and eight insertion rods (9) are connected to the lower end of the support plate (23) at equal intervals.

10. The oil water injection wellhead logging field detector according to claim 8, characterized in that: The gas detector (21) comprises a hydrogen sulfide sensor and a carbon monoxide sensor, a well depth sensor and a pressure sensor are installed in the installation groove (22), and a tungsten carbide aluminum oxide composite coating (27) is provided on a peripheral side wall of the protection block (20).

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