Composite Drilling Equipment and Drilling Method for Deep Geological Sequestration of Mine Water

Abstract

The present invention discloses a composite drilling equipment and drilling method for deep mine water geological storage, relating to the technical field of deep mine water geological storage. The equipment comprises a drive module, a composite drill bit, a sensor module, and a control module. The power output end of the drive module is connected to the composite drill bit, and the composite drill bit is used to drill the main shaft and auxiliary shaft. The sensor module is used to monitor formation parameters and the rotational speed of the composite drill bit. The sensor module and the drive module are both electrically connected to the control module, and the sensor module can transmit the monitored information to the control module, which then controls the operation of the drive module. The present invention can improve storage efficiency and safety.

Description

Technical Field

[0001] The present invention relates to the technical field of deep geological storage of mine water, and in particular to a composite drilling equipment and a drilling method for deep geological storage of mine water. Background Art

[0002] With the continuous development of the coal industry, the treatment of mine water has become an urgent problem to be solved. Traditional mine water treatment methods have disadvantages such as high cost and high risk of environmental pollution.

[0003] As an innovative treatment method, deep geological storage technology for mine water has the advantages of low treatment cost, small environmental impact, and efficient resource utilization. At the same time, through reasonable sealing measures, it can reduce the pollution and damage of mine water to groundwater, protect aquifers, maintain the natural circulation and balance of groundwater, and prevent the damage to groundwater resources caused by coal mining activities. However, there is currently a lack of efficient special equipment in deep geological storage technology for mine water, which directly affects the sealing efficiency and safety. Summary of the Invention

[0004] The purpose of the present invention is to provide a composite drilling equipment and drilling method for deep geological storage of mine water, so as to solve the problems existing in the above-mentioned prior art and improve the storage efficiency and storage safety.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a composite drilling equipment for deep geological sealing of mine water, comprising a drive module, a composite drill bit, a sensor module and a control module. The power output end of the drive module is connected to the composite drill bit, and the composite drill bit is used to drill the main wellbore and the auxiliary wellbore. The sensor module is used to monitor formation parameters and the rotation speed of the composite drill bit. The sensor module and the drive module are both electrically connected to the control module, and the sensor module can transmit the monitored information to the control module, and enable the control module to control the action of the drive module.

[0007] In one embodiment, the composite drill bit includes a main drill bit and multiple auxiliary drill bits, the multiple auxiliary drill bits are arranged around the outer circumference of the main drill bit, and the main drill bit and the auxiliary drill bits are both connected to the driving module. The main drill bit is used to drill the main wellbore, and the main drill bit and the auxiliary drill bits are used to drill the auxiliary wellbore when working simultaneously.

[0008] In one embodiment, the driving module includes a main driving element and a secondary driving element, the main driving element is connected to the main drill bit, and the secondary driving element is connected to the secondary drill bit.

[0009] In one embodiment, the main driving element and the main drill bit, as well as the auxiliary driving element and the auxiliary drill bit are respectively connected via a transmission assembly.

[0010] In one embodiment, the two groups of transmission components have the same structure and both include a reducer and a coupling, the power input end of the reducer is connected to the power output end of the main drive element or the auxiliary drive element, the power output end of the reducer is connected to one end of the coupling, and the other end of the coupling is connected to the main drill bit or the auxiliary drill bit.

[0011] In one embodiment, the main drill bit is rotatably connected to a mounting seat, and the outer diameter of the mounting seat is less than or equal to the maximum outer diameter of the main drill bit. The auxiliary driving element is connected to the end surface of the mounting seat through a telescopic element, and the telescopic element can drive the auxiliary driving element and the auxiliary drill bit to move away from or close to the axis of the main drill bit. The auxiliary drill bit can extend out of the mounting seat or be completely retracted to one side of the mounting seat.

[0012] In one embodiment, the telescopic element is a linear push rod motor.

[0013] In one embodiment, the angle between the axis of the main drill bit and the axis of the auxiliary drill bit is 10° to 30°.

[0014] In one embodiment, the sensor module includes a pressure sensor, a water level sensor and a speed sensor. The pressure sensor and the water level sensor are both used to be set inside the formation, and the pressure sensor is used to monitor the formation pressure. The water level sensor is used to monitor the water level in the main wellbore and the auxiliary wellbore. The speed sensor is installed on the composite drill bit, and the speed sensor is used to monitor the speed of the composite drill bit.

[0015] The present invention also provides a composite drilling method for deep geological storage of mine water, using the composite drilling equipment for deep geological storage of mine water described in any one of the above technical solutions, comprising the following steps:

[0016] S1. Conduct geological surveys in the target area and collect geological parameters. Based on the survey results, determine the drilling parameters of the composite drill bit.

[0017] S2. Start the main drive element in the drive module to drive the main drill bit in the composite drill bit to drill to form the main wellbore. During the drilling process, the pressure sensor and water level sensor in the sensor module are used to monitor the formation pressure and water level changes in the main wellbore in real time. The speed sensor in the sensor module is used to monitor the speed of the main drill bit in real time. Based on the data fed back by the sensor module, the control module adjusts the drilling parameters of the main drill bit in real time.

[0018] S3. When the main wellbore reaches the predetermined depth, the auxiliary drive element in the drive module is activated to drive the auxiliary drill bit in the composite drill bit to drill, thereby forming multiple auxiliary wellbores around the main wellbore. At this time, the main drive element and the auxiliary drive element operate simultaneously. During the drilling process, the formation pressure and the water level changes in the main and auxiliary wellbores are monitored in real time using pressure sensors and water level sensors. The speed sensor is also used to monitor the speed of the main and auxiliary drill bits in real time. Based on the data fed back by the sensor module, the control module adjusts the drilling parameters of the main and auxiliary drill bits in real time.

[0019] S4. Inject the pretreated mine water into the main shaft and auxiliary shaft through the water injection pipeline for sealing. During the water injection process, continue to monitor the pressure changes and water level changes in the main shaft and auxiliary shaft to ensure the safety and stability of the sealing process.

[0020] Compared with the prior art, the present invention has achieved the following technical effects:

[0021] The composite drilling equipment and drilling method for deep geological storage of mine water provided by the present invention include a drive module, a composite drill bit, a sensor module and a control module. The power output end of the drive module is connected to the composite drill bit to provide driving force through the drive module, thereby driving the composite drill bit to rotate and realize wellbore drilling. The composite drill bit is used to drill the main wellbore and the auxiliary wellbore, and then through the cooperation of the main wellbore and the auxiliary wellbore, the storage space of mine water is expanded and the storage efficiency of mine water is improved. The sensor module is used to monitor formation parameters and the rotation speed of the composite drill bit, and then can monitor the formation pressure changes and water level changes in the main wellbore and the auxiliary wellbore in real time during the drilling process, so as to timely discover and deal with abnormal situations in the drilling process, improve the safety of drilling operations, and reduce environmental risks. The sensor module and the drive module are both electrically connected to the control module, and the sensor module can transmit the monitored information to the control module, and enable the control module to control the action of the drive module to adjust the drilling parameters such as the rotation speed of the composite drill bit in real time according to actual conditions, thereby improving adaptability and flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a schematic structural diagram of the composite drilling equipment used for deep geological storage of mine water in Example 1;

[0024] In the figure: 1-main drive element, 2-auxiliary drive element, 3-reducer, 4-coupling, 5-control module, 6-sensor module, 7-main drill bit, 8-auxiliary drill bit. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] The purpose of the present invention is to provide a composite drilling equipment and drilling method for deep geological storage of mine water, so as to solve the problems existing in the prior art and improve the storage efficiency and storage safety.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Example 1

[0029] like Figure 1 As shown, this embodiment provides a composite drilling equipment for deep geological storage of mine water, including a drive module, a composite drill bit, a sensor module 6 and a control module 5. The power output end of the drive module is connected to the composite drill bit to provide driving force through the drive module, thereby driving the composite drill bit to rotate and realize wellbore drilling. The composite drill bit is used to drill the main wellbore and the auxiliary wellbore, and then through the cooperation of the main wellbore and the auxiliary wellbore, the storage space of mine water is expanded and the storage efficiency of mine water is improved. The sensor module 6 is used to monitor formation parameters and the rotation speed of the composite drill bit, and then can monitor the formation pressure changes and water level changes in the main wellbore and the auxiliary wellbore in real time during the drilling process, so as to timely detect and deal with abnormal conditions in the drilling process, improve the safety of drilling operations, and reduce environmental risks. The sensor module 6 and the drive module are both electrically connected to the control module 5, and the sensor module 6 can transmit the monitored information to the control module 5, and enable the control module 5 to control the action of the drive module to adjust the drilling parameters such as the rotation speed of the composite drill bit in real time according to actual conditions, thereby improving adaptability and flexibility.

[0030] Specifically, the composite drill bit includes a main drill bit 7 and a plurality of auxiliary drill bits 8, and the plurality of auxiliary drill bits 8 are arranged around the outer periphery of the main drill bit 7, that is, the plurality of auxiliary drill bits 8 surround the outer periphery of the main drill bit 7 in a circle, and the main drill bit 7 and the auxiliary drill bits 8 are both connected to a drive module, and the drive module is used to drive the main drill bit 7 and the auxiliary drill bits 8 to rotate respectively, and the main drill bit 7 is used to drill the main wellbore, and the main drill bit 7 and the auxiliary drill bits 8 are used to drill the auxiliary wellbore when working simultaneously, thereby forming a circle of auxiliary wellbore around the outer periphery of the main wellbore. Through the joint action of the main wellbore and the auxiliary wellbore, the storage space of the mine water is expanded and the storage efficiency of the mine water is improved. As a preferred solution, the number of auxiliary drill bits 8 is set to four, and the four auxiliary drill bits 8 are evenly arranged around the outer periphery of the main drill bit 7, that is, forming a cross-shaped arrangement. Those skilled in the art can also make adaptive adjustments to the number of auxiliary drill bits 8 according to actual needs, thereby obtaining the required number of auxiliary wellbores.

[0031] The main drill bit 7 is made of carbide material, has high strength and wear resistance, and can adapt to different geological conditions. Compared with the main drill bit 7, the auxiliary drill bit 8 is relatively small in size, but more in number, and can flexibly adjust the drilling angle and depth.

[0032] The driving module includes a main driving element 1 and an auxiliary driving element 2. The main driving element 1 is connected to the main drill bit 7 and is used to independently control the rotation of the main drill bit 7. The auxiliary driving element 2 is connected to the auxiliary drill bit 8 and is used to independently control the rotation of the auxiliary drill bit 8, thereby ensuring that the rotational drilling of the main drill bit 7 and the auxiliary drill bit 8 do not affect each other.

[0033] Preferably, the main drive element 1 has a larger power, designed to be 300 kilowatts, and is used to drive the main drill bit 7 for high-speed drilling to ensure the rapid formation of the main wellbore; while the auxiliary drive element 2 has a relatively smaller power, designed to be 50 kilowatts, and is used to drive the auxiliary drill bit 8 for low-speed drilling to accurately control the drilling process of the auxiliary wellbore and avoid causing excessive disturbance to the formation.

[0034] The main drive element 1 and the main drill bit 7, as well as the auxiliary drive element 2 and the auxiliary drill bit 8 are respectively connected through a transmission component. Through the setting of the transmission component, the driving force of the main drive element 1 is stably transmitted to the main drill bit 7, and the driving force of the auxiliary drive element 2 is stably transmitted to the auxiliary drill bit 8.

[0035] The two sets of transmission components have the same structure and both include a reducer 3 and a coupling 4. The power input end of the reducer 3 is connected to the power output end of the main drive element 1 or the auxiliary drive element 2, the power output end of the reducer 3 is connected to one end of the coupling 4, and the other end of the coupling 4 is connected to the main drill bit 7 or the auxiliary drill bit 8. The output speed of the main drive element 1 and the auxiliary drive element 2 is adjusted by the design of the reducer 3, and the setting of the coupling 4 is combined to achieve the output of stable driving force to the main drill bit 7 and the auxiliary drill bit 8.

[0036] The main drill bit 7 is rotatably connected to a mounting seat to prevent the setting of the mounting seat from affecting the rotation of the main drill bit 7. The outer diameter of the mounting seat is less than or equal to the maximum outer diameter of the main drill bit 7 to prevent the mounting seat from affecting the downward movement of the entire equipment during the drilling process of the main drill bit 7. At the same time, through the setting of the mounting seat, a mounting platform is also provided for the auxiliary drill bit 8. The auxiliary drive element 2 is connected to the end surface of the mounting seat through a telescopic element, and the telescopic element can drive the auxiliary drive element 2 and the auxiliary drill bit 8 to move away from or close to the axis of the main drill bit 7, thereby realizing that the auxiliary drill bit 8 extends out of the mounting seat or is completely recovered to one side of the mounting seat. When only the main wellbore needs to be drilled, The auxiliary drill bit 8 is completely retracted to one side of the mounting seat, thereby preventing the auxiliary drill bit 8 from affecting the drilling of the main drill bit 7. When the main wellbore reaches a certain depth and the auxiliary wellbore needs to be drilled synchronously, the telescopic element is used to control the auxiliary drill bit 8 to extend out of the mounting seat, so that the auxiliary drill bit 8 can drill to form the auxiliary wellbore when it rotates. For the connection between the main drill bit 7 and the auxiliary drill bit 8, technical personnel in this field can also choose other forms of connection methods, as long as it can be achieved that when the auxiliary drill bit 8 is needed for drilling, the auxiliary drill bit 8 is extended and does not affect the main drill bit 7, and when the auxiliary drill bit 8 is not needed for drilling, the auxiliary drill bit 8 is retracted and does not affect the normal drilling of the main wellbore.

[0037] The telescopic element is a linear push rod motor, and the extension and retraction of the linear push rod motor can realize the extension and retraction of the auxiliary drill bit 8. Those skilled in the art can also use other forms of telescopic elements according to actual needs, such as hydraulic cylinders and pneumatic cylinders, as long as the auxiliary drill bit 8 can be moved stably.

[0038] Both the main drive element 1 and the auxiliary drive element 2 are motors. Preferably, both are equipped with frequency converters to adjust their speeds as needed. The dual-power source design and optimized drilling method make the drilling process more efficient, reducing energy consumption and operating costs.

[0039] The control module 5 is preferably a ground control system that, in conjunction with the design of the sensor module 6, can monitor various parameters during the drilling process in real time, such as formation pressure, changes in water levels in the main and auxiliary wellbores, and the rotational speeds of the main and auxiliary drill bits 7 and 8. Data acquired by the sensor module 6 is transmitted to the ground control center via a wired or wireless connection for analysis. The drilling process can then be controlled and adjusted based on the results of the monitoring data analysis.

[0040] The angle between the axis of the main drill bit 7 and the axis of the auxiliary drill bit 8 is 10° to 30°, and those skilled in the art can adjust the angle according to actual needs.

[0041] The sensor module 6 includes a pressure sensor, a water level sensor and a speed sensor. The pressure sensor and the water level sensor are both used to be set inside the formation, and the pressure sensor is used to monitor the formation pressure. The water level sensor is used to monitor the water level in the main wellbore and the auxiliary wellbore. The speed sensor is installed on the composite drill bit, and the speed sensor is used to monitor the speed of the composite drill bit. Preferably, the specific setting positions of the pressure sensor, water level sensor and speed sensor can be appropriately adjusted by technical personnel in this field to enable them to better monitor the corresponding parameters.

[0042] Example 2

[0043] This embodiment provides a composite drilling method for deep geological storage of mine water, using the composite drilling equipment for deep geological storage of mine water in Example 1, including the following steps:

[0044] S1. Conduct geological surveys in the target area and collect geological parameters, including stratum structure, rock hardness, and groundwater distribution. Based on the survey results, determine the drilling parameters of the composite drill bit, such as drill bit type, drilling angle, and rotation speed, and develop a detailed drilling plan.

[0045] S2. Start the main drive element 1 in the drive module to drive the main drill bit 7 in the composite drill bit to drill at a relatively high speed (e.g., 100-200 rpm) to form a main wellbore with a diameter of approximately 1 meter. During the drilling process, the pressure sensor and water level sensor in the sensor module 6 are used to monitor the formation pressure and the water level changes in the main wellbore in real time. The speed sensor in the sensor module 6 is also used to monitor the speed of the main drill bit 7 in real time. Based on the data fed back by the sensor module 6 (e.g., a sudden increase in pressure, a sudden increase in water level, abnormal speed of the main drill bit 7, etc., indicating that an aquifer or hard rock formation may be encountered), the control module 5 is used to adjust the drilling parameters of the main drill bit 7 in real time (e.g., increasing the speed to break through the hard rock formation).

[0046] S3. When the main wellbore reaches a predetermined depth, the auxiliary drive element 2 in the drive module is activated, driving the auxiliary drill bit 8 in the composite drill bit to drill at a relatively low rotation speed (e.g., 30-50 rpm) to form multiple auxiliary wellbores with a diameter of approximately 0.5 meters around the main wellbore. At this time, the main drive element 1 and the auxiliary drive element 2 operate simultaneously. During the drilling process, pressure sensors and water level sensors are used to monitor the formation pressure and water level changes in the main and auxiliary wellbores in real time. A rotation speed sensor is also used to monitor the rotation speeds of the main drill bit 7 and the auxiliary drill bit 8 in real time. Based on data fed back by the sensor module 6 (e.g., a sudden increase in pressure, a sudden increase in water level, abnormal rotation speed of the auxiliary drill bit 8, indicating the possibility of encountering an aquifer or hard rock formation), the control module 5 adjusts the drilling parameters of the main drill bit 7 and the auxiliary drill bit 8 in real time (e.g., increasing the rotation speed to break through the hard rock formation). The drilling angle of the auxiliary drill bit 8 can be adjusted according to actual needs, generally between 10 and 30 degrees, to ensure connectivity between the auxiliary wellbore and the main wellbore and uniform distribution of the sealed space.

[0047] S4. Inject the pretreated mine water into the main shaft and the auxiliary shaft through the water injection pipeline for sealing. During the water injection process, continue to monitor the pressure changes and water level changes in the main shaft and the auxiliary shaft to ensure the safety and stability of the sealing process. At the same time, the control module 5 and the sensor module 6 are used to conduct long-term monitoring of the sealed formation to evaluate the sealing effect and environmental impact.

[0048] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A composite drilling method for deep geological storage of mine water, characterized by: A composite drilling device for deep geological storage of mine water is used. The composite drilling device for deep geological storage of mine water includes a drive module, a composite drill bit, a sensor module, and a control module. The power output end of the drive module is connected to the composite drill bit, and the composite drill bit is used to drill the main wellbore and the auxiliary wellbore. The sensor module is used to monitor formation parameters and the rotation speed of the composite drill bit. The sensor module and the drive module are both electrically connected to the control module, and the sensor module can transmit the monitored information to the control module, so that the control module controls the action of the drive module. The composite drill bit includes a main drill bit and a plurality of auxiliary drill bits, wherein the plurality of auxiliary drill bits are arranged around the outer circumference of the main drill bit, and the main drill bit and the auxiliary drill bits are both connected to the driving module. The main drill bit is used to drill a main wellbore, and the main drill bit and the auxiliary drill bits are used to drill an auxiliary wellbore when working simultaneously. The driving module includes a main driving element and a secondary driving element, wherein the main driving element is connected to the main drill bit, and the secondary driving element is connected to the secondary drill bit; The following steps are also included: S1. Conduct geological surveys in the target area and collect geological parameters. Based on the survey results, determine the drilling parameters of the composite drill bit. S2. Start the main drive element in the drive module to drive the main drill bit in the composite drill bit to drill to form the main wellbore. During the drilling process, the pressure sensor and water level sensor in the sensor module are used to monitor the formation pressure and water level changes in the main wellbore in real time. The speed sensor in the sensor module is used to monitor the speed of the main drill bit in real time. Based on the data fed back by the sensor module, the control module adjusts the drilling parameters of the main drill bit in real time. S3. When the main wellbore reaches the predetermined depth, the auxiliary drive element in the drive module is activated to drive the auxiliary drill bit in the composite drill bit to drill, thereby forming multiple auxiliary wellbores around the main wellbore. At this time, the main drive element and the auxiliary drive element operate simultaneously. During the drilling process, the formation pressure and the water level changes in the main and auxiliary wellbores are monitored in real time using pressure sensors and water level sensors. The speed sensor is also used to monitor the speed of the main and auxiliary drill bits in real time. Based on the data fed back by the sensor module, the control module adjusts the drilling parameters of the main and auxiliary drill bits in real time. S4. Inject the pretreated mine water into the main shaft and auxiliary shaft through the water injection pipeline for sealing. During the water injection process, continue to monitor the pressure changes and water level changes in the main shaft and auxiliary shaft to ensure the safety and stability of the sealing process.

2. The composite drilling method for deep geological storage of mine water according to claim 1, characterized in that: The main driving element and the main drill bit are connected to each other through a transmission assembly, as are the auxiliary driving element and the auxiliary drill bit.

3. The composite drilling method for deep geological storage of mine water according to claim 2, characterized in that: The two groups of transmission components have the same structure and both include a reducer and a coupling. The power input end of the reducer is connected to the power output end of the main drive element or the auxiliary drive element, the power output end of the reducer is connected to one end of the coupling, and the other end of the coupling is connected to the main drill bit or the auxiliary drill bit.

4. The composite drilling method for deep geological storage of mine water according to claim 1, characterized in that: The main drill bit is rotatably connected to a mounting seat, and the outer diameter of the mounting seat is less than or equal to the maximum outer diameter of the main drill bit. The auxiliary driving element is connected to the end surface of the mounting seat through a telescopic element, and the telescopic element can drive the auxiliary driving element and the auxiliary drill bit to move away from or close to the axis of the main drill bit. The auxiliary drill bit can extend out of the mounting seat or be completely retracted to one side of the mounting seat.

5. The composite drilling method for deep geological storage of mine water according to claim 4, characterized in that: The telescopic element is a linear push rod motor.

6. The composite drilling method for deep geological storage of mine water according to claim 1, characterized in that: The angle between the axis of the main drill bit and the axis of the auxiliary drill bit is 10°~30°.

7. The composite drilling method for deep geological storage of mine water according to claim 1, characterized in that: The sensor module includes a pressure sensor, a water level sensor and a speed sensor. The pressure sensor and the water level sensor are both arranged inside the formation, and the pressure sensor is used to monitor the formation pressure. The water level sensor is used to monitor the water level in the main wellbore and the auxiliary wellbore. The speed sensor is installed on the composite drill bit, and the speed sensor is used to monitor the speed of the composite drill bit.

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