Composite drilling equipment and drilling method for geological storage of water depth part of mine

Abstract

The invention discloses composite drilling equipment and a drilling method for geological storage of a mine water depth part, and relates to the technical field of geological storage of the mine water depth part. The composite drilling equipment comprises a driving module, a composite drill bit, a sensor module and a control module, and the power output end of the driving module is connected with the composite drill bit; the composite drill bit is used for drilling a main shaft and an auxiliary shaft, the sensor module is used for monitoring stratum parameters and the rotating speed of the composite drill bit, the sensor module and the driving module are both electrically connected with the control module, and the sensor module can transmit monitored information to the control module. And the control module controls the driving module to act. According to the invention, the sealing efficiency and the sealing safety can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of deep geological sealing of mine water, and in particular to a composite drilling equipment and a drilling method for deep geological sealing 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 defects 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 a 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: The present invention provides a composite drilling equipment for deep geological sealing of mine water, comprising a driving module, a composite drill bit, a sensor module and a control module. The power output end of the driving module is connected to the composite drill bit, and the composite drill bit is used to drill a main shaft and a secondary shaft. The sensor module is used to monitor formation parameters and the rotation speed of the composite drill bit. The sensor module and the driving 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 driving module.

[0006] 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 a main wellbore, and the main drill bit and the auxiliary drill bits are used to drill an auxiliary wellbore when working simultaneously.

[0007] 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.

[0008] 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.

[0009] 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.

[0010] 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 in a direction 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.

[0011] In one embodiment, the telescopic element is a linear push rod motor.

[0012] 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°.

[0013] In one embodiment, the sensor module includes a pressure sensor, a water level sensor and a rotation 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, and the rotation speed sensor is installed on the composite drill bit, and the rotation speed sensor is used to monitor the rotation speed of the composite drill bit.

[0014] 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: S1. Conduct geological survey in the target area and collect geological parameters, and determine the drilling parameters of the composite drill bit according to the survey results; S2. Start the main driving element in the driving module to drive the main drill bit in the composite drill bit to drill to form a main wellbore, and during the drilling process, use the pressure sensor and water level sensor in the sensor module to monitor the formation pressure and the water level change in the main wellbore in real time, and use the speed sensor in the sensor module to monitor the speed of the main drill bit in real time, and adjust the drilling parameters of the main drill bit in real time through the control module according to the data fed back by the sensor module; S3. When the main wellbore reaches a predetermined depth, the auxiliary drive element in the drive module is started to drive the auxiliary drill bit in the composite drill bit to drill, so as to form multiple auxiliary wellbores around the main wellbore. At this time, the main drive element and the auxiliary drive element are simultaneously actuated, and during the drilling process, the pressure sensor and the water level sensor are used to monitor the formation pressure and the water level changes in the main wellbore and the auxiliary wellbore in real time, and the speed sensor is used to monitor the speed of the main drill bit and the auxiliary drill bit in real time. According to the data fed back by the sensor module, the drilling parameters of the main drill bit and the auxiliary drill bit are adjusted in real time through the control module; 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.

[0015] Compared with the prior art, the present invention has achieved the following technical effects: The composite drilling equipment and drilling method for deep geological sealing of mine water provided by the present invention include a driving module, a composite drill bit, a sensor module and a control module. The power output end of the driving module is connected to the composite drill bit to provide driving force through the driving module, thereby driving the composite drill bit to rotate and realize the drilling of the wellbore. 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 sealing space of mine water is expanded, and the sealing 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 it can monitor the formation pressure changes and the 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 driving 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 driving module, so as 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

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. 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 creative work.

[0017] Figure 1 This is a schematic diagram of the structure of the composite drilling equipment used for deep geological storage of mine water in Example 1; In the figure: 1-main driving element, 2-auxiliary driving element, 3-reducer, 4-coupling, 5-control module, 6-sensor module, 7-main drill bit, 8-auxiliary drill bit. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0019] The purpose of the present invention is to provide a composite drilling equipment and a 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.

[0020] 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.

[0021] Embodiment 1 like Figure 1 As shown, the present embodiment provides a composite drilling equipment for deep geological storage of mine water, including a driving module, a composite drill bit, a sensor module 6 and a control module 5. The power output end of the driving module is connected to the composite drill bit to provide a driving force through the driving module, thereby driving the composite drill bit to rotate and realize the drilling of the wellbore. 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 the mine water is expanded, and the sealing efficiency of the mine water is improved. The sensor module 6 is used to monitor the formation parameters and the rotation speed of the composite drill bit, and then it can monitor the formation pressure changes and the 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 the drilling operation, and reduce environmental risks. The sensor module 6 and the driving 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 driving module to adjust the drilling parameters such as the rotation speed of the composite drill bit in real time according to the actual situation, so as to improve adaptability and flexibility.

[0022] 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 driving module, and the driving 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 shaft, and the main drill bit 7 and the auxiliary drill bits 8 are used to drill the auxiliary shaft when working at the same time, thereby forming a circle of auxiliary shafts around the outer periphery of the main shaft, and through the joint action of the main shaft and the auxiliary shaft, the storage space of the mine water is expanded, and the sealing efficiency of the mine water is improved. As a preferred solution, the auxiliary drill bits 8 are 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, and 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 shafts.

[0023] The main drill bit 7 is made of cemented 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.

[0024] 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 the main driving element 1 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 the auxiliary driving element 2 is used to independently control the rotation of the auxiliary drill bit 8, so that the rotational drilling of the main drill bit 7 and the auxiliary drill bit 8 do not affect each other.

[0025] 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.

[0026] The main driving element 1 and the main drill bit 7, as well as the auxiliary driving element 2 and the auxiliary drill bit 8 are respectively connected through a transmission assembly. Through the setting of the transmission assembly, the driving force of the main driving element 1 can be stably transmitted to the main drill bit 7, and the driving force of the auxiliary driving element 2 can be stably transmitted to the auxiliary drill bit 8.

[0027] The two groups 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.

[0028] 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 device 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, as long as it can be achieved that when the auxiliary drill bit 8 is needed to drill, 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 to drill, the auxiliary drill bit 8 is retracted and does not affect the normal drilling of the main wellbore.

[0029] 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 select other forms of telescopic elements according to actual needs, such as hydraulic cylinders and air cylinders, as long as the auxiliary drill bit 8 can be moved stably.

[0030] The main drive element 1 and the auxiliary drive element 2 are both motors. Preferably, the main drive element 1 and the auxiliary drive element 2 are equipped with frequency converters to adjust the speed as needed. The dual power source design and optimized drilling method make the drilling process more efficient and reduce the energy consumption and operating cost of the equipment.

[0031] The control module 5 is preferably a ground control system, which can monitor various parameters in the drilling process in real time in conjunction with the design of the sensor module 6, such as formation pressure, water level changes in the main wellbore and the auxiliary wellbore, and the rotation speed of the main drill bit 7 and the auxiliary drill bit 8. The data obtained by the sensor module 6 is transmitted to the ground control center for analysis through a wired or wireless connection, and the drilling process can be controlled and adjusted according to the analysis results of the monitoring data.

[0032] 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.

[0033] The sensor module 6 includes a pressure sensor, a water level sensor and a rotation 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 rotation speed sensor is installed on the composite drill bit, and the rotation speed sensor is used to monitor the rotation speed of the composite drill bit. Preferably, the technical personnel in this field can make appropriate adjustments to the specific setting positions of the pressure sensor, the water level sensor and the rotation speed sensor so that they can better monitor the corresponding parameters.

[0034] Embodiment 2 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 embodiment 1, including the following steps: S1. Conduct geological surveys in the target area and collect geological parameters, including stratum structure, rock hardness, groundwater distribution, etc. According to the survey results, determine the drilling parameters of the composite drill bit, such as drill bit type, drilling angle, rotation speed, etc., and formulate a detailed drilling plan; 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 rpm-200 rpm) to form a main wellbore with a diameter of about 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 change in the main wellbore in real time, and the speed sensor in the sensor module 6 is used to monitor the speed of the main drill bit 7 in real time. According to the data fed back by the sensor module 6 (such as a sudden increase in pressure, a sudden increase in water level, an abnormal speed of the main drill bit 7, etc., it is believed that aquifers, hard rock formations, etc. may be encountered), the drilling parameters of the main drill bit 7 are adjusted in real time through the control module 5 (such as increasing the speed to break through the hard rock formation, etc.); S3. When the main wellbore reaches the predetermined depth, the auxiliary drive element 2 in the drive module is started to drive the auxiliary drill bit 8 in the composite drill bit to drill at a relatively low speed (e.g., 30 rpm-50 rpm) to form multiple auxiliary wellbores with a diameter of about 0.5 meters around the main wellbore. At this time, the main drive element 1 and the auxiliary drive element 2 are simultaneously actuated, and during the drilling process, the formation pressure and the water level changes in the main wellbore and the auxiliary wellbore are monitored in real time using the pressure sensor and the water level sensor, and the speed sensor is used to monitor the speeds of the main drill bit 7 and the auxiliary drill bit 8 in real time. According to the data fed back by the sensor module 6 (such as a sudden increase in pressure, a sudden increase in water level, abnormal speed of the auxiliary drill bit 8, etc., it is believed that aquifers, hard rock formations, etc., may be encountered), the drilling parameters of the main drill bit 7 and the auxiliary drill bit 8 are adjusted in real time through the control module 5 (such as increasing the speed to break through hard rock formations, etc.); the drilling angle of the auxiliary drill bit 8 can be adjusted according to actual needs, generally between 10 degrees and 30 degrees, to ensure the connectivity between the auxiliary wellbore and the main wellbore and the uniform distribution of the sealing space; 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.

[0035] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A composite drilling equipment for deep geological storage of mine water, characterized by: It includes a driving module, a composite drill bit, a sensor module and a control module. The power output end of the driving 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 the formation parameters and the rotation speed of the composite drill bit. The sensor module and the driving 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 driving module.

2. The composite drilling equipment for deep geological storage of mine water according to claim 1 is characterized in that: The composite drill bit includes a main drill bit and multiple auxiliary drill bits, wherein the multiple auxiliary drill bits are arranged around the outer circumference of the main drill bit, and both the main drill bit and the auxiliary drill bits are connected to the driving module. The main drill bit is used for drilling a main wellbore, and the main drill bit and the auxiliary drill bits are used for drilling an auxiliary wellbore when working simultaneously.

3. The composite drilling equipment for deep geological storage of mine water according to claim 2 is characterized in that: The driving module comprises a main driving element and an auxiliary driving element, wherein the main driving element is connected to the main drill bit, and the auxiliary driving element is connected to the auxiliary drill bit.

4. The composite drilling equipment for deep geological storage of mine water according to claim 3 is 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.

5. The composite drilling equipment for deep geological storage of mine water according to claim 4 is 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.

6. The composite drilling equipment for deep geological storage of mine water according to claim 3 is 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 in a direction 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.

7. The composite drilling equipment for deep geological storage of mine water according to claim 6 is characterized in that: The telescopic element is a linear push rod motor.

8. The composite drilling equipment for deep geological storage of mine water according to claim 2, characterized in that: The angle between the axis of the main drill bit and the axis of the auxiliary drill bit is 10°~30°.

9. The composite drilling equipment 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 rotation 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 rotation speed sensor is installed on the composite drill bit, and the rotation speed sensor is used to monitor the rotation speed of the composite drill bit.

10. A composite drilling method for deep geological storage of mine water, characterized in that: Using the composite drilling equipment for deep geological storage of mine water according to any one of claims 1 to 9 comprises the following steps: S1. Conduct geological survey in the target area and collect geological parameters, and determine the drilling parameters of the composite drill bit according to the survey results; S2. Start the main driving element in the driving module to drive the main drill bit in the composite drill bit to drill to form a main wellbore, and during the drilling process, use the pressure sensor and water level sensor in the sensor module to monitor the formation pressure and the water level change in the main wellbore in real time, and use the speed sensor in the sensor module to monitor the speed of the main drill bit in real time, and adjust the drilling parameters of the main drill bit in real time through the control module according to the data fed back by the sensor module; S3. When the main wellbore reaches a predetermined depth, the auxiliary drive element in the drive module is started to drive the auxiliary drill bit in the composite drill bit to drill, so as to form multiple auxiliary wellbores around the main wellbore. At this time, the main drive element and the auxiliary drive element are simultaneously actuated, and during the drilling process, the pressure sensor and the water level sensor are used to monitor the formation pressure and the water level changes in the main wellbore and the auxiliary wellbore in real time, and the speed sensor is used to monitor the speed of the main drill bit and the auxiliary drill bit in real time. According to the data fed back by the sensor module, the drilling parameters of the main drill bit and the auxiliary drill bit are adjusted in real time through the control module; 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.

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