Intelligent variable frequency centralized constant pressure and constant volume water supply system for cluster drilling and flushing operation of drilling rig
The intelligent variable frequency centralized constant pressure and constant flow water supply system solves the problems of instability and insufficient adaptability of traditional drilling rig water supply systems, realizes efficient, stable and intelligent water supply for drilling and flushing operations, and reduces operation and maintenance costs.
Patent Information
- Application Number
- CN202521316754.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-25
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-06-25
AI Technical Summary
Traditional drilling rig water supply systems suffer from unstable water pressure, insufficient adaptability, and low levels of intelligence, resulting in low drilling and flushing efficiency and high maintenance costs.
The system employs a smart variable frequency centralized constant pressure and constant flow water supply system for drilling and flushing operations using a drilling rig group. It includes a variable frequency self-balancing pump group, a sealed tank group, an accumulator, and an intelligent control system. The system dynamically adjusts the water supply pressure and flow through multi-stage pipelines and parallel pump groups. Combined with the accumulator to recover pressure energy, it achieves constant pressure and constant flow water supply. The system is also equipped with an intelligent control system for real-time monitoring and fault diagnosis.
It significantly improved the stability and efficiency of the water supply system, reduced energy consumption and operation and maintenance costs, enhanced the system's adaptability and intelligence, and ensured the efficient operation of drilling and flushing operations.
Smart Images
Figure CN224678798U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of drilling rig water supply system, and relates to an intelligent variable frequency centralized constant pressure and constant quantity water supply system for drilling and flushing operations of drilling rig groups, which is used for centralized water supply in drilling and flushing operations for gas control in coal mines. Background Technology
[0002] In underground coal mine gas control drilling and perforation operations, a large amount of water or mud is needed to cool the drill bit, carry coal cuttings out of the hole, and balance formation pressure, especially during perforation operations. Traditional water supply methods typically involve a separate water supply system for each drilling rig. While this meets basic needs, it has several significant drawbacks: First, independent water supply systems occupy a large amount of space and lead to energy and resource waste; second, the system efficiency is low, especially under high-intensity, high-load, and high-water-consumption drilling and perforation environments, where fluctuations in water pressure and flow can severely impact drilling and perforation efficiency; finally, the large number of devices results in high maintenance costs and a high failure rate, increasing the difficulty of management and operation during mine production.
[0003] With the increasing demand for energy conservation and emission reduction, and the rapid development of automation and intelligent technologies, traditional single-unit water supply methods are gradually revealing more significant shortcomings. Therefore, centralized water supply systems are increasingly becoming an important solution for drilling and flushing operations. Compared to traditional independent water supply systems, centralized water supply systems reduce the number of devices and the space occupied by sharing a single water supply pipeline, thereby effectively improving resource utilization efficiency and reducing energy consumption. However, existing centralized water supply systems still have some problems that urgently need to be addressed:
[0004] Unstable water supply pressure: Currently, most centralized water supply systems often experience unstable water supply pressure during drilling rig operations due to insufficient system design. Especially when the water supply needs of different drilling rigs vary significantly, the water supply pressure within the pipelines often fails to meet the requirements of all rigs, leading to a rapid pressure drop and impacting the overall safety and efficiency of the operation.
[0005] Insufficient adaptability of the water supply system: Although traditional centralized water supply systems have improved centralized water supply management to some extent, they are poorly adaptable to different working conditions. The workload, geological conditions, and drilling rig performance vary greatly during the drilling and drilling process, making it impossible for the water supply system to achieve precise water supply control, especially under high load or special working conditions, where it is impossible to adjust the water supply pressure and flow rate in real time.
[0006] Low level of intelligence and difficult maintenance: Although centralized water supply systems have some centralized control functions, most systems still lack advanced intelligent monitoring and fault diagnosis capabilities, and cannot achieve remote monitoring, data acquisition, and real-time fault analysis. This not only makes it difficult for operators to detect and handle system faults in a timely manner, but also fails to provide effective support during system maintenance, increasing maintenance costs and downtime.
[0007] To address the aforementioned issues, drilling operations urgently require a new water supply system solution that can stably, accurately, and efficiently meet the water supply needs of drilling rig groups, and possess functions such as intelligent adjustment, remote monitoring, and fault diagnosis. Utility Model Content
[0008] In view of this, the purpose of this utility model is to solve the above problems and provide an intelligent variable frequency centralized constant pressure and constant quantity water supply system for drilling and flushing operations of drilling rig groups.
[0009] To achieve the above objectives, this utility model provides the following technical solution:
[0010] A smart variable frequency centralized constant pressure and constant quantity water supply system for drilling and flushing operations of drilling rig groups includes water supply pipelines, water tanks, variable frequency self-balancing pump sets, sealed tank sets, and accumulators.
[0011] The water tank is connected to the water supply pipeline via a water tank delivery pipeline, thereby connecting to a water source for water storage; the inlet of the variable frequency self-balancing pump set is connected to the water tank, and the outlet is connected to one end of the primary pipeline. The other end of the primary pipeline is connected to the sealed tank group via a secondary pipeline. The sealed tank group is connected to the drilling rig group via the drilling rig water supply pipeline; the accumulator is connected to the drilling rig water supply pipeline to recover the pressure energy at the end of the pipeline and release the stored energy when the water supply pressure is insufficient to assist in water supply.
[0012] Furthermore, the sealed tank group includes a first sealed tank and a second sealed tank connected in series; the accumulator is arranged after the second sealed tank; the first sealed tank is provided with a three-stage pipeline, which passes through the second sealed tank and the accumulator and is directly connected to the drilling rig water supply pipeline; the second sealed tank is provided with a four-stage pipeline, which passes through the accumulator and is directly connected to the drilling rig water supply pipeline.
[0013] Furthermore, the diameter of the primary pipeline is larger than that of the secondary pipeline, and the diameter of the tertiary pipeline is smaller than that of the quaternary pipeline.
[0014] Furthermore, the variable frequency self-balancing pump set includes multiple variable frequency self-balancing water pumps connected in parallel.
[0015] Furthermore, the sealed tank assembly includes at least two compressed air sealed tanks. The lower sides of the sealed tanks are respectively provided with water inlets and water outlets. When water flows into the sealed tanks, the compressed air stored in the sealed tanks is compressed, thereby increasing the pressure inside the tanks and providing a stable pressure for water supply.
[0016] Furthermore, it also includes an intelligent control system, which includes a controller, a water pump signal line, a water pressure sensor, a flow sensor, a liquid level sensor, and a remote monitoring module. The controller is electrically connected to the variable frequency self-balancing pump set and the control water valve in the pipeline through the water pump signal line. The water pressure sensor and the flow sensor are installed in the drilling rig's water supply pipeline, and the liquid level sensor is installed in the sealed tank. The controller controls the variable frequency self-balancing pump set and the control water valve based on the information collected by the water pressure sensor, the flow sensor, and the liquid level sensor. The remote monitoring module transmits the system operation data to the ground control center in real time.
[0017] Furthermore, the water supply pipeline is also equipped with a water supply branch pipe, which is directly connected to the secondary pipeline.
[0018] The beneficial effects of this utility model are as follows:
[0019] 1. Accumulators Significantly Improve Energy Efficiency: The accumulator is the core innovation of this system. Installed at the end of the drilling rig's water supply pipeline, it specifically recovers and stores the underutilized pressure energy in the pipeline. This energy recovery mechanism effectively reduces energy waste, especially during high-load or multi-rig operations, when a large amount of pressure energy is often generated at the end of the pipeline. Traditional systems directly lose this energy, while this system converts it into reusable energy through the accumulator. When the water supply pressure is insufficient, the accumulator releases the stored energy to assist the variable frequency self-balancing pump set in stabilizing the water supply, reducing the pump set's operating load, and lowering energy consumption by approximately 15%-20%. This design not only optimizes energy utilization and meets the energy conservation and emission reduction requirements of coal mines, but also significantly reduces operating costs, demonstrating outstanding advantages in green environmental protection.
[0020] 2. Improved water supply stability and efficiency: The variable frequency self-balancing pump set dynamically adjusts its speed according to the needs of the drilling rig group, and combined with the energy storage of the compressed air sealed tank, it ensures constant pressure and constant quantity of water supply. The auxiliary role of the accumulator further stabilizes the pressure, copes with high-load conditions, avoids fluctuations affecting drill bit cooling, cuttings flushing, and formation pressure balance, and improves drilling efficiency and operation quality.
[0021] 3. Intelligent control reduces operation and maintenance costs: The intelligent control system integrates water pressure, flow, and level sensors to collect parameters in real time, and the controller precisely adjusts the pump set and water valves. The remote monitoring module transmits data to the ground, supports fault diagnosis, reduces manual inspections, lowers operation and maintenance costs, improves response speed, and ensures stable operation in complex underground environments.
[0022] 4. Strong adaptability: Multi-stage pipelines and parallel pump sets (3-10 units) can flexibly cope with different numbers of drilling rigs and working conditions. Water supply branch pipes and series sealed tanks meet the needs of drilling rigs at near and far distances and adapt to changes in roadway length and work intensity.
[0023] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description
[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein:
[0025] Figure 1 This is a schematic diagram of a smart variable frequency centralized constant pressure and constant flow water supply system for drilling and flushing operations of a drilling rig group according to this utility model.
[0026] Figure 2 This is the control logic diagram of the water supply system in this utility model.
[0027] Attached diagram labels: 1-Water supply pipeline; 2-Solenoid valve; 3-Water tank; 4-Electromagnetic float; 5-Primary pipeline; 6-Four-way valve; 7-Secondary pipeline; 8-First sealed tank; 9-Second sealed tank; 10-Accumulator; 11-Pressure sensor; 12-Drilling rig group; 13-Tertiary pipeline; 14-Fourth-stage pipeline; 15-Variable frequency self-balancing water pump; 16-Data cable; 17-Controller; 18-Touchscreen display; 19-Water tank water supply pipeline; 20-Water supply branch pipe. Detailed Implementation
[0028] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0029] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.
[0030] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0031] Example 1
[0032] Please see Figures 1-2 This embodiment provides a specific implementation scheme for an intelligent variable frequency centralized constant pressure and constant flow water supply system for drilling and flushing operations of drilling rig groups. It is suitable for the centralized water supply needs of multiple drilling rigs (3-10 units) in underground coal mine gas control drilling and flushing operations. The system structure is as follows: Figure 1 As shown, it mainly includes a water tank 3, a variable frequency self-balancing pump set, a sealed tank set, an accumulator 10, a water supply pipeline 1, and an intelligent control system.
[0033] 1. System Composition
[0034] Water tank 3: A 2000L stainless steel water tank with an inlet at the top and a water supply pipe 19 at the bottom. The tank has a built-in electromagnetic buoy 4 for real-time water level monitoring to ensure sufficient water supply. The water tank is connected to the water supply pipe 1 via the water supply pipe 19, and a solenoid valve 2 is installed in the pipe to control the water flow.
[0035] Variable frequency self-balancing pump set: Consists of 3 variable frequency self-balancing water pumps connected in parallel, each pump has a rated power of 15kW and a maximum flow rate of 50m³ / h. 3 The pump has a flow rate of / h and a head of 100m. The pump inlet is connected to water tank 3, and the outlet is connected to the sealed tank group through primary pipeline 5 and secondary pipeline 7. Primary pipeline 5 has a diameter of DN180mm and is made of high-strength PE pipe. A four-way valve 6 is provided in the pipeline for expansion connections.
[0036] The sealed tank assembly includes a first sealed tank 8 and a second sealed tank 9, both of which are compressed air sealed tanks with a capacity of 15L each and a pressure resistance of 1.5MPa. The two tanks are arranged in series. The inlet of the first sealed tank 8 is connected to the first-level pipeline 5 via a secondary pipeline 7 (diameter DN108), and the outlet is connected to the inlet of the second sealed tank 9. The first sealed tank 8 is equipped with a tertiary pipeline 13 (diameter DN50), and the second sealed tank 9 is equipped with a quaternary pipeline 14 (diameter DN50). Both pipelines pass over the accumulator 10 and are directly connected to the drilling rig's water supply pipeline 1, ensuring the differentiated water supply needs of the drilling rigs at different locations.
[0037] Accumulator 10: A diaphragm accumulator with a capacity of 100L and an operating pressure range of 4-6MPa is installed on the drilling rig water supply pipeline 1 after the second sealed tank 9. The accumulator recovers excess pressure energy at the end of the pipeline and releases the stored energy when the water supply pressure is insufficient to assist in constant pressure water supply.
[0038] Water supply pipeline 1: The main pipe has a diameter of DN108mm and is made of corrosion-resistant PE pipe, and is laid along the tunnel. Water supply pipeline 1 is equipped with a water supply branch pipe 20 (diameter DN50), which is connected to the secondary pipeline 7 through a four-way connector 6 to meet the water supply needs of the drilling rig at close range. Pressure sensor 11 and flow sensor are installed on the pipeline to monitor the water supply parameters in real time.
[0039] The intelligent control system includes a PLC controller 17, a touchscreen display 18, a water pressure sensor 11, a flow sensor, a level sensor (installed inside a sealed tank), and a remote monitoring module. The controller 17 is electrically connected to the variable frequency self-balancing pump set and the solenoid valve 2 in the pipeline via the pump signal line 16, and precisely adjusts the pump set speed and valve opening after collecting sensor data. The remote monitoring module transmits operating data (pressure, flow rate, level, pump set status, etc.) to the ground control center via a 4G / 5G network, supporting remote fault diagnosis and parameter adjustment.
[0040] 2. Working principle
[0041] When the system starts, water tank 3 stores water through water tank supply pipeline 19, and electromagnetic buoy 4 monitors the water level and sends feedback to controller 17. When the water level reaches the set value, the variable frequency self-balancing pump group starts, and the water flows through primary pipeline 5 and secondary pipeline 7 into the sealed tank group. The compressed air in the first sealed tank 8 and the second sealed tank 9 is compressed, storing pressure energy to stabilize the water flow output, which is then output to the drilling rig group 12 through the drilling rig water supply pipeline.
[0042] Accumulator 10 monitors the pressure changes at the end of the drilling rig's water supply pipeline 1 in real time. When the water consumption of the drilling rig group 12 decreases, the pressure at the end of the pipeline increases, and accumulator 10 absorbs and stores the excess pressure energy. When the water consumption surges (such as during drilling operations) causing a pressure drop, accumulator 10 releases the stored energy to assist the pump group in maintaining a constant pressure (4.0 ± 0.05 MPa) and a constant flow rate (50-100 m³ / h). 3 / h) water supply.
[0043] The intelligent control system collects real-time data through water pressure sensor 11, flow sensor, and level sensor. Controller 17 dynamically adjusts the speed of the variable frequency pump set and the opening of solenoid valve 2 according to a preset algorithm (such as PID control) to ensure stable water supply parameters for each drilling rig. When the pressure is lower than the set value, the pump set increases its frequency; when the pressure is too high, the pump set decreases its frequency or the accumulator stores energy; when the level is abnormal, the system alarms and suspends operation. The remote monitoring module uploads data to the ground control center, where operators can view the operating status, adjust parameters, or diagnose faults via touchscreen display 18 or a remote terminal.
[0044] 3. Technical parameters
[0045] Water supply capacity: Maximum flow rate 200m³ 3 / h, constant pressure range 4-6MPa.
[0046] Applicable number of drilling rigs: 3-10 units (6 units in this example).
[0047] Energy consumption: Compared with traditional single-unit water supply systems, the overall energy consumption is reduced by approximately 18%.
[0048] Total pipeline length: suitable for tunnel lengths of 100-500m.
[0049] Response time: Pressure fluctuation adjustment time <5s, fault alarm <1s.
[0050] Intelligent functions: Supports remote monitoring, fault self-diagnosis, data storage and analysis.
[0051] Example 2: Application under complex working conditions
[0052] This embodiment is designed for downhole drilling and flushing operations with a long tunnel length (400m), complex geological conditions, and a large number of drilling rigs (8 units).
[0053] 1. System Adjustment
[0054] Water tank capacity: increased to 3000L to meet high water consumption needs.
[0055] Pump configuration: Increase to 6 variable frequency self-balancing water pumps (15kW each) to operate in parallel to improve water supply capacity.
[0056] Sealed tank assembly: A third sealed tank (capacity 15L) is added, and the pipe diameters of the tertiary pipeline 13 and the quaternary pipeline 14 are adjusted to DN50 and DN60 respectively to optimize the water supply pressure over long distances.
[0057] Accumulator: Capacity increased to 150L to accommodate greater pressure fluctuations.
[0058] Water supply pipelines: The main pipe diameter has been increased to DN150mm, and the number of water supply branch pipes has been increased from 20 to 3, which are respectively connected to drilling rigs at near, medium and long distances.
[0059] 2. Running effect
[0060] Under complex operating conditions, the system monitors the water demand of eight drilling rigs in real time through an intelligent control system, dynamically allocating flow and pressure. Test results show that:
[0061] Constant pressure performance: The water supply pressure is stable at 5.0±0.05MPa, with a fluctuation range better than that of traditional systems (±0.1MPa).
[0062] Constant flow performance: The flow rate of a single drilling rig is stable at 25-35 m³ / h. 3 / h, meeting the requirements of punching operations.
[0063] Energy efficiency: The accumulator recovers approximately 12 kWh / day of pressure energy, reduces the operating load of the pump unit by 20%, and reduces overall energy consumption by 22% compared to traditional systems.
[0064] Intelligent performance: Within 72 hours of operation, the system automatically diagnosed and handled two minor pressure anomalies. The remote monitoring module successfully uploaded the operation data, and the ground control center optimized the pump group operation strategy through data analysis, reducing manual intervention.
[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A smart variable frequency centralized constant pressure and constant flow water supply system for drilling and flushing operations of a drilling rig group, characterized in that: This includes water supply pipelines, water tanks, variable frequency self-balancing pump sets, sealed tank sets, and accumulators; The water tank is connected to the water supply pipeline via a water tank delivery pipeline, thereby connecting to a water source for water storage; the inlet of the variable frequency self-balancing pump set is connected to the water tank, and the outlet is connected to one end of the primary pipeline. The other end of the primary pipeline is connected to the sealed tank group via a secondary pipeline. The sealed tank group is connected to the drilling rig group via the drilling rig water supply pipeline; the accumulator is connected to the drilling rig water supply pipeline to recover the pressure energy at the end of the pipeline and release the stored energy when the water supply pressure is insufficient to assist in water supply.
2. The intelligent variable frequency centralized constant pressure and constant flow water supply system for drilling and flushing operations of a drilling rig group according to claim 1, characterized in that: The sealed tank group includes a first sealed tank and a second sealed tank connected in series; the accumulator is arranged after the second sealed tank; the first sealed tank is provided with a three-stage pipeline, which passes through the second sealed tank and the accumulator and is directly connected to the drilling rig water supply pipeline; the second sealed tank is provided with a four-stage pipeline, which passes through the accumulator and is directly connected to the drilling rig water supply pipeline.
3. The intelligent variable frequency centralized constant pressure and constant flow water supply system for drilling and flushing operations of drilling rig groups according to claim 2, characterized in that: The diameter of the primary pipeline is larger than that of the secondary pipeline, and the diameter of the tertiary pipeline is smaller than that of the quaternary pipeline.
4. The intelligent variable frequency centralized constant pressure and constant flow water supply system for drilling and flushing operations of drilling rig groups according to claim 1, characterized in that: The variable frequency self-balancing pump set includes multiple variable frequency self-balancing water pumps connected in parallel.
5. The intelligent variable frequency centralized constant pressure and constant flow water supply system for drilling and flushing operations of a drilling rig group according to claim 1, characterized in that: The sealed tank assembly includes at least two compressed air sealed tanks. The lower sides of the sealed tanks are respectively provided with water inlets and water outlets. When water flows into the sealed tanks, the compressed air stored in the sealed tanks is compressed, thereby increasing the pressure inside the tanks and providing a stable pressure for water supply.
6. The intelligent variable frequency centralized constant pressure and constant flow water supply system for drilling and flushing operations of drilling rig groups according to claim 1, characterized in that: It also includes an intelligent control system, which comprises a controller, a water pump signal line, a water pressure sensor, a flow sensor, a liquid level sensor, and a remote monitoring module. The controller is electrically connected to the variable frequency self-balancing pump set and the control water valve in the pipeline via the water pump signal line. The water pressure sensor and the flow sensor are installed in the drilling rig's water supply pipeline, and the liquid level sensor is installed inside the sealed tank. The controller controls the variable frequency self-balancing pump set and the control water valve based on the information collected by the water pressure sensor, the flow sensor, and the liquid level sensor. The remote monitoring module transmits the system operation data to the ground control center in real time.
7. The intelligent variable frequency centralized constant pressure and constant flow water supply system for drilling and flushing operations of a drilling rig group according to claim 1, characterized in that: The water supply pipeline is also equipped with a water supply branch pipe, which is directly connected to the secondary pipeline.