A chassis assembly for a coalbed methane drilling rig

Abstract

A chassis device for a coalbed methane drilling rig includes a tracked walking mechanism, a drilling rig fixing mechanism, a gas monitoring mechanism, a hydraulic power module, and an electrical controller. The drilling rig fixing mechanism includes hydraulic support legs mounted on the periphery of a fixed platform, which support and fix the equipment through telescopic outriggers. A displacement detection structure based on the cooperation of a magnetic scale and a magnetic head is installed on the telescopic outriggers, and a grounding rod is used as a reference to realize real-time monitoring of the subsidence of the support legs during drilling operations. The electrical controller continuously collects subsidence data and compares it with a preset safety threshold. When abnormal subsidence occurs, an alarm is issued and the operation status is controlled in conjunction with the controller. The gas monitoring mechanism collects and detects the gas emitted during drilling through a gas collection chamber, and the detection results are uploaded through a wireless transceiver module. This invention can realize dual real-time monitoring of the support status and gas environment during drilling operations, effectively improving the safety and reliability of the equipment under complex geological conditions.

Description

Technical Field

[0001] This invention belongs to the technical field of coalbed methane extraction equipment, specifically referring to a chassis device for a coalbed methane drilling rig. Background Technology

[0002] Coalbed methane drilling rigs typically need to move and drill in complex terrain conditions during actual operation. Their chassis structure not only needs good mobility but also requires a stable and reliable support foundation during operation. Currently, most drilling rig chassis adopt a tracked structure, using hydraulic support legs for equipment support and fixation. However, existing technologies often lack continuous monitoring methods for the support legs' support status after initial support is achieved. During drilling, factors such as soft ground, localized subsidence, or vibration and impact can cause the support legs to sink without timely detection, posing a safety hazard of equipment tilting or even overturning.

[0003] On the other hand, during coalbed methane drilling operations, combustible gases such as methane are often released. If these gases are not effectively monitored, they can easily lead to safety accidents. Although some existing equipment is equipped with gas detection devices, they are mostly independently set up and cannot be effectively correlated with the drilling location, resulting in delayed or inaccurate detection data, which is insufficient to meet the needs of real-time safety monitoring. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the present invention provides a chassis device for a coalbed methane drilling rig, so as to at least partially solve the above technical problems.

[0005] The technical solution adopted by this invention is as follows: This invention proposes a chassis device for a coalbed methane drilling rig, including a crawler-mounted walking mechanism, a drilling rig fixing mechanism, a gas monitoring mechanism, a hydraulic power module, and an electric controller. The drilling rig fixing mechanism, the hydraulic power module, and the electric controller are mounted on the crawler-mounted walking mechanism, and the gas monitoring mechanism is mounted on the drilling rig fixing mechanism. The drilling rig fixing mechanism includes a fixing platform and a fixing frame. The fixing platform is mounted on the crawler-mounted walking mechanism and is fixedly connected to the fixing frame. Hydraulic support legs are provided around the fixing frame, and telescopic outriggers are provided on the hydraulic support legs. The hydraulic support legs are controlled to extend and retract. The outriggers extend and retract, with their bottom ends contacting the ground. Each outrigger has a vertical groove containing a vertical slide rod, which in turn has a grounding rod. The grounding rod is slidably connected to the slide rod, with its bottom end also contacting the ground. A magnetic head is mounted on the grounding rod, and a magnetic scale is mounted on the vertical groove. The magnetic scale and magnetic head are magnetically connected. The magnetic scale and magnetic head are configured to monitor the sinking of the outriggers by measuring the positional difference between the grounding rod and the outrigger. A hydraulic power module is configured to drive the tracked walking mechanism and the hydraulic support legs. The hydraulic power module, magnetic scale, and magnetic head are all electrically connected to the electric controller.

[0006] Furthermore, the fixed platform is equipped with a drilling hole, and the drilling hole is equipped with a drill bit positioning clamp, the inner diameter of which is adjusted by bolts and screws.

[0007] Furthermore, the gas monitoring mechanism includes a monitoring rod, a gas collection chamber, and a laser methane sensor. The monitoring rod is mounted on a fixed platform, and the gas collection chamber is slidably mounted on the monitoring rod. The position of the gas collection chamber corresponds to that of the borehole. The gas collection chamber has a hollow structure, and the laser methane sensor is mounted on the gas collection chamber and communicates with the internal cavity of the gas collection chamber.

[0008] Furthermore, the bottom of the gas collection chamber is a sloping surface with air inlets, and the surface is close to the ground at the drilling location.

[0009] Furthermore, the tracked walking mechanism includes a chassis frame, a drive wheel assembly, a guide wheel assembly, and a load-bearing wheel assembly. The drive wheel assembly, guide wheel assembly, and load-bearing wheel assembly are all rotatably mounted on the chassis frame. The hydraulic power module is configured to drive the movement of the drive wheel assembly. The drive wheel assembly, guide wheel assembly, and load-bearing wheel assembly are equipped with spliced ​​tracks.

[0010] Furthermore, an equipment baffle is provided on the chassis frame, which covers the hydraulic power module and the electric controller.

[0011] Furthermore, the equipment baffle is provided with an operation window, which corresponds to the position of the electrical controller. The electrical controller is equipped with an electronic display screen and an operation panel, which are exposed to the outside of the equipment baffle through the operation window.

[0012] Furthermore, the equipment baffle is equipped with a heat dissipation grille, which corresponds to the position of the hydraulic power module and the electric controller, and a dustproof net is installed on the heat dissipation grille.

[0013] Furthermore, the hydraulic power module includes an integrated control valve block, which is mounted on the chassis frame and connects to the hydraulic power module, drive wheel assembly, and hydraulic support legs.

[0014] Furthermore, the electric controller is equipped with a wireless transceiver module, which is electrically connected to the electric controller. The wireless transceiver module enables remote communication with external terminals via wireless signals.

[0015] Compared with the prior art, the present invention has the following advantages: By setting a displacement detection structure based on the cooperation of a magnetic scale and a magnetic head on the telescopic outrigger, and using the grounding rod as a relatively stable reference, the sinking of the outrigger during drilling operations can be monitored in real time. The electrical controller continuously analyzes the detection data and makes threshold judgments, thereby enabling timely identification of the risk of support instability and issuing early warnings. Compared with the traditional method that only relies on the initial support state, this invention significantly improves the safety assurance capability during equipment operation.

[0016] By placing the gas monitoring unit at the corresponding location of the drilling hole and adopting a gas collection structure close to the ground, the gas emitted during the drilling process can be efficiently collected and detected in real time by the laser methane sensor. Combined with the wireless transceiver module, remote alarm and information transmission are realized, thereby constructing a dual monitoring system that supports both safety and gas safety, and improving the overall safety and reliability of coalbed methane drilling rigs in complex geological environments. Attached Figure Description

[0017] Figure 1 This is a perspective view of the chassis assembly of a coalbed methane drilling rig according to an embodiment of the present invention; Figure 2 This is a front view of the chassis assembly of a coalbed methane drilling rig according to an embodiment of the present invention; Figure 3 This is a top view of the chassis assembly of a coalbed methane drilling rig according to an embodiment of the present invention; Figure 4 for Figure 3 A cross-sectional view along the AA direction; Figure 5 This is a right view of the chassis assembly of a coalbed methane drilling rig according to an embodiment of the present invention; Figure 6 for Figure 5 Enlarged view of point I in the middle; Figure 7 for Figure 5 Enlarged view of section II.

[0018] Among them, 100 is the tracked walking mechanism, 101 is the chassis frame, 102 is the drive wheel assembly, 103 is the guide wheel assembly, 104 is the load-bearing wheel assembly, 105 is the spliced ​​track, 106 is the equipment baffle, 107 is the operating window, 108 is the heat dissipation grille, 200 is the drilling rig fixing mechanism, 201 is the fixing platform, 202 is the drill hole, 203 is the drill bit positioning clamp, 204 is the fixing frame, 205 is the hydraulic support leg, 206 is the telescopic outrigger, 207 is the vertical through slot, 208 is the vertical slide bar, 209 is the grounding rod, 210 is the magnetic scale, 211 is the magnetic head, 300 is the gas monitoring mechanism, 301 is the monitoring rod, 302 is the gas collection chamber, and 303 is the laser methane sensor. 400. Hydraulic power module; 401. Integrated control valve block; 500. Electric controller; 501. Wireless transceiver module; 502. Electronic display screen; 503. Operation panel.

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] like Figures 1-7As shown, this embodiment provides a chassis device for a coalbed methane drilling rig, including a tracked walking mechanism 100, a drilling rig fixing mechanism 200, a gas monitoring mechanism 300, a hydraulic power module 400, and an electrical controller 500. The tracked walking mechanism 100 serves as the mobile foundation of the entire machine, supporting the drilling rig fixing mechanism 200, the hydraulic power module 400, and the electrical controller 500. The gas monitoring mechanism 300 is located above the drilling rig fixing mechanism 200 and corresponds to the drilling operation area, used for real-time collection and detection of gases emitted during drilling. The hydraulic power module 400 drives the tracked walking mechanism 100 and the support structure in the drilling rig fixing mechanism 200. The electrical controller 500 serves as the control core, electrically connected to each execution and detection unit, realizing data acquisition, processing, and control command output.

[0023] The tracked walking mechanism 100 includes a chassis frame 101, a drive wheel set 102, a guide wheel set 103, and a load-bearing wheel set 104. The drive wheel set 102, guide wheel set 103, and load-bearing wheel set 104 are all rotatably mounted on the chassis frame 101 and form a closed transmission structure by splicing together the track 105. A hydraulic power module 400 drives the drive wheel set 102 to rotate, thereby driving the spliced ​​track 105 to move, enabling the machine to travel and turn under complex terrain conditions. An equipment baffle 106 is installed above the chassis frame 101, covering the hydraulic power module 400 and the electric controller 500 to protect key components. An operation window 107 is provided on the equipment baffle 106 to expose the electronic display screen 502 and the operation panel 503 on the electric controller 500 for easy operation and observation. A heat dissipation grille 108 is also provided on the equipment baffle 106, corresponding to the arrangement of the hydraulic power module 400 and the electric controller 500, and is equipped with a dustproof net to balance heat dissipation and protection.

[0024] The drilling rig fixing mechanism 200 includes a fixing platform 201 and a fixing frame 204. The fixing platform 201 is mounted on the chassis frame 101 and has a drilling hole 202 for drill rods to pass through. A drill bit positioning clamp 203 is installed on the drilling hole 202. The drill bit positioning clamp 203 has an adjustable inner diameter via bolts and screws to accommodate and limit different specifications of drill bits. The fixing frame 204 is located around the fixing platform 201, and hydraulic support legs 205 are evenly distributed around it. Each hydraulic support leg 205 is equipped with a telescopic outrigger 206. The hydraulic support legs 205 are driven and controlled by a hydraulic power module 400, causing the telescopic outrigger 206 to extend downwards and contact the ground, thereby supporting the entire machine in the working position.

[0025] Each telescopic outrigger 206 is provided with a vertical through groove 207, and a vertical slide rod 208 is slidably installed in the vertical through groove 207. The lower end of the vertical slide rod 208 is connected to a grounding rod 209. The bottom end of the grounding rod 209 directly contacts the ground and serves as a relatively stable reference point during the support process. A magnetic head 211 is installed on the grounding rod 209, and a magnetic scale 210 is installed at the corresponding position in the vertical through groove 207. The magnetic head 211 and the magnetic scale 210 magnetically cooperate to form a displacement detection structure. After the hydraulic support leg 205 drives the telescopic outrigger 206 to press down to the ground and complete the initial support, the electric controller 500 records the relative position of the magnetic head 211 and the magnetic scale 210 at this time as the initial reference value. If the telescopic outrigger 206 sinks further due to factors such as changes in the bearing capacity of the formation, drilling vibration, or local ground loosening during subsequent drilling operations, the telescopic outrigger 206 will have a displacement change relative to the grounding rod 209. This displacement change will be detected in real time by the magnetic scale 210 and the magnetic head 211 and converted into an electrical signal and transmitted to the electrical controller 500.

[0026] The electric controller 500 continuously collects displacement data from each support point and compares it with preset safety thresholds. When the subsidence of any support point exceeds the set threshold, it determines that there is a safety risk in the current support status. At this time, the electric controller 500 outputs an alarm signal, which is displayed on the electronic display screen 502, and the abnormal information is sent to a remote terminal via the wireless transceiver module 501. Simultaneously, the electric controller 500 can coordinate with the hydraulic power module 400 to execute safety control strategies, including limiting the drilling rig's operating status or prompting a stop to drilling, to avoid equipment tilting or overturning due to support instability.

[0027] The gas monitoring mechanism 300 includes a monitoring rod 301, a gas collection chamber 302, and a laser methane sensor 303. The monitoring rod 301 is fixedly mounted on a fixed platform 201. The gas collection chamber 302 is slidably mounted on the monitoring rod 301 and its position can be adjusted up and down along the rod. The gas collection chamber 302 corresponds to the position of the borehole 202. The gas collection chamber 302 has a hollow structure with an inclined slope at its bottom. Multiple air inlets are provided on the slope, and the slope is close to the ground at the drilling location, allowing coalbed methane escaping during drilling to collect and enter the gas collection chamber 302 under the action of airflow and gravity. The laser methane sensor 303 is installed on the gas collection chamber 302 and communicates with its internal cavity. It is used to detect the concentration of the collected gas in real time. The detection data is transmitted to an electrical controller 500. When the gas concentration exceeds a set safety value, the electrical controller 500 issues an alarm and uploads the data to a remote system via a wireless transceiver module 501.

[0028] The hydraulic power module 400 includes an integrated control valve block 401, which is mounted on the chassis frame 101 and connected to the drive wheel assembly 102 and the hydraulic support leg 205, respectively, to achieve centralized control of the walking drive and support actions. The electrical controller 500 is electrically connected to the hydraulic power module 400, the magnetic scale 210, the magnetic head 211, and the laser methane sensor 303, and realizes remote communication function through the wireless transceiver module 501.

[0029] The working process of this embodiment is as follows: After the equipment moves to the designated working position via the tracked walking mechanism 100, it stops. The hydraulic power module 400 drives the hydraulic support leg 205 to move, causing the telescopic outrigger 206 to extend downward and contact the ground to complete the initial support, while establishing the initial benchmark for subsidence detection. Subsequently, the drilling rig performs drilling operations through the drilling hole 202. During the operation, the gas monitoring mechanism 300 continuously collects and detects the gas in the drilling area, while the subsidence detection structure continuously monitors the displacement changes of each support point. When the subsidence of any support point exceeds the safety threshold, the system issues an alarm and triggers the safety control strategy, thereby realizing full-process monitoring and risk warning of the drilling rig's support status. After the operation is completed, the hydraulic support leg 205 retracts, the tracked walking mechanism 100 resumes its walking ability, and the equipment is transferred to the next working position for continued use.

[0030] Through the aforementioned structure and operating method, this embodiment enables dynamic monitoring of support stability throughout the entire drilling operation. Combined with gas detection functionality, it forms a multi-dimensional safety assurance mechanism, thereby enhancing the safety and reliability of coalbed methane drilling rigs operating in complex geological environments. It should be noted that in this invention, the grounding rod remains in contact with the ground throughout the support process and serves as a displacement measurement reference. Its displacement change relative to the telescopic outrigger accurately reflects the actual subsidence of the outrigger. The combination of the magnetic scale and magnetic head enables high-precision displacement detection, resulting in high sensitivity and reliability in subsidence monitoring. By uniformly processing the multi-point support data through the electrical controller, a comprehensive evaluation of the overall support status can be achieved.

[0031] Furthermore, the bottom of the gas collection chamber is designed with an inclined structure, close to the ground at the drilling location. This facilitates the introduction of gas escaping during drilling into the collection chamber, preventing gas diffusion and detection delays. The laser methane sensor features fast response and high detection accuracy, meeting the real-time monitoring needs of coalbed methane operating environments. All functional modules are integrated and controlled by an electrical controller, and remote monitoring is achieved through a wireless communication module, giving the equipment a high degree of automation and safety protection capabilities.

[0032] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A chassis assembly for a coalbed methane drilling rig, characterized in that: The system includes a tracked walking mechanism (100), a drilling rig fixing mechanism (200), a gas monitoring mechanism (300), a hydraulic power module (400), and an electric controller (500). The drilling rig fixing mechanism (200), the hydraulic power module (400), and the electric controller (500) are mounted on the tracked walking mechanism (100), and the gas monitoring mechanism (300) is mounted on the drilling rig fixing mechanism (200). The drilling rig fixing mechanism (200) includes a fixing platform (201) and a fixing frame (204). The fixing platform (201) is mounted on the crawler walking mechanism (100). The fixing platform (201) is fixedly connected to the fixing frame (204). The fixing frame (204) is provided with hydraulic support legs (205) around its perimeter. The hydraulic support legs (205) are provided with telescopic outriggers (206). The hydraulic support legs (205) control the extension and retraction of the telescopic outriggers (206). The bottom end of the telescopic outriggers (206) contacts the ground. The telescopic outriggers (206) are provided with vertical through grooves (207). A vertical slide bar (208) is provided in the groove (207), and a grounding rod (209) is provided on the vertical slide bar (208). The grounding rod (209) is slidably connected to the vertical slide bar (208). The bottom end of the grounding rod (209) contacts the ground. A magnetic head (211) is provided on the grounding rod (209). A magnetic scale (210) is provided on the vertical through groove (207). The magnetic scale (210) is magnetically connected to the magnetic head (211). The magnetic scale (210) and the magnetic head (211) are configured to monitor the sinking amount of the telescopic outrigger (206) by the position difference between the grounding rod (209) and the telescopic outrigger (206). The hydraulic power module (400) is configured to drive the movement of the track walking mechanism (100) and the hydraulic support leg (205). The hydraulic power module (400), the magnetic scale (210) and the magnetic head (211) are all electrically connected to the electric controller (500).

2. The chassis device of the coalbed methane drilling rig according to claim 1, characterized in that: The fixed platform (201) is provided with a drilling hole (202), and the drilling hole (202) is provided with a drill bit positioning clamp (203). The inner diameter of the drill bit positioning clamp (203) is adjusted by bolts and screws.

3. The chassis device of the coalbed methane drilling rig according to claim 2, characterized in that: The gas monitoring mechanism (300) includes a monitoring rod (301), a gas collection chamber (302), and a laser methane sensor (303). The monitoring rod (301) is mounted on a fixed platform (201), and the gas collection chamber (302) is slidably mounted on the monitoring rod (301). The position of the gas collection chamber (302) corresponds to that of the borehole (202). The gas collection chamber (302) has a hollow structure. The laser methane sensor (303) is mounted on the gas collection chamber (302) and communicates with the internal cavity of the gas collection chamber (302).

4. The chassis assembly of the coalbed methane drilling rig according to claim 3, characterized in that: The bottom of the gas collection chamber (302) is an inclined slope with an air inlet on the slope, and the slope is close to the ground at the drilling location.

5. The chassis assembly of the coalbed methane drilling rig according to claim 4, characterized in that: The tracked walking mechanism (100) includes a chassis frame (101), a drive wheel set (102), a guide wheel set (103), and a load-bearing wheel set (104). The drive wheel set (102), the guide wheel set (103), and the load-bearing wheel set (104) are all rotatably mounted on the chassis frame (101). The hydraulic power module (400) is configured to drive the drive wheel set (102). The drive wheel set (102), the guide wheel set (103), and the load-bearing wheel set (104) are provided with spliced ​​tracks (105).

6. The chassis assembly of the coalbed methane drilling rig according to claim 5, characterized in that: The chassis frame (101) is provided with an equipment baffle (106), which covers the hydraulic power module (400) and the electric controller (500).

7. The chassis assembly of the coalbed methane drilling rig according to claim 6, characterized in that: The equipment baffle (106) is provided with an operation window (107), which corresponds to the position of the electric controller (500). The electric controller (500) is provided with an electronic display screen (502) and an operation panel (503). The electronic display screen (502) and the operation panel (503) are exposed to the outside of the equipment baffle (106) through the operation window (107).

8. The chassis assembly of the coalbed methane drilling rig according to claim 7, characterized in that: The equipment baffle (106) is provided with a heat dissipation grille (108), which corresponds to the position of the hydraulic power module (400) and the electric controller (500). The heat dissipation grille (108) is provided with a dustproof net.

9. The chassis assembly of the coalbed methane drilling rig according to claim 8, characterized in that: The hydraulic power module (400) includes an integrated control valve block (401), which is mounted on the chassis frame (101). The integrated control valve block (401) connects the hydraulic power module (400), the drive wheel assembly (102), and the hydraulic support leg (205).

10. The chassis assembly of the coalbed methane drilling rig according to claim 9, characterized in that: The electrical controller (500) is equipped with a wireless transceiver module (501), which is electrically connected to the electrical controller (500). The wireless transceiver module (501) enables remote communication with an external terminal via wireless signals.

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