The Importance of Quality Mud Pump Spare Parts for Efficient Operations2023/07/20In industries where drilling operations are a vital component, such as oil and gas, mining, and construction, mud pumps play a crucial role in ensuring the efficient circulation of drilling fluids. To...
Reliable and Durable: Exploring the Best Mud Pump Parts Manufacturers2023/07/17In the demanding world of drilling operations, mud pumps play a critical role in circulating drilling fluid or mud. To ensure the reliable and efficient performance of mud pumps, it is essential to us...
Smooth and Efficient: How Hydraulic Seat Pullers Simplify Seat Removal2023/07/13When it comes to removing seats, whether in an automotive or furniture context, the process can be challenging and time-consuming. However, with the advent of hydraulic seat pullers, seat removal has ...
Mastering Casing Retrieval: The Advantages of Using Casing Spears2023/07/10Casing retrieval is a critical operation in the oil and gas industry, involving the removal of casing strings from the wellbore. To accomplish this task efficiently and safely, casing spears have beco...
Using a Fluid End Seat Puller for Efficient Maintenance2023/07/03Maintaining the optimal performance of pumps in industries such as oil and gas, mining, and construction is crucial for seamless operations. One essential tool that aids in efficient pump maintenance ...
Why Are Dampener Bladders Essential in Piping Systems?2023/06/14Piping systems are the backbone of numerous industrial applications, carrying fluids from one point to another. However, these systems often face challenges such as pressure surges, water hammer, and ...
The Role of Dampener Bladders in Hydraulic Systems2023/06/13Hydraulic systems are widely used in various industries for transmitting power and controlling machinery. These systems rely on precise fluid pressure control to ensure smooth operation and prevent da...
Common Issues and Troubleshooting Tips for Dampener Bladders2023/06/12Dampener bladders are essential components in industrial applications, serving to control pressure pulsations and vibrations in fluid systems. While they are designed to provide reliable performance, ...
op 5 Benefits of Using Dampener Bladders in Industrial Applications2023/06/11In industrial applications where fluid systems are utilized, managing pressure pulsations and vibrations is crucial to ensure smooth and efficient operations. Dampener bladders play a vital role in mi...
The Importance of Reliable Downhole Fishing Tools for Well Intervention2023/06/10Well intervention is a critical process in the oil and gas industry that involves various activities to restore, enhance, or maintain well productivity. During well intervention operations, the use of...
Exploring Different Types of Choke Valves2023/06/08Choke valves play a critical role in controlling the flow of fluids in a variety of industries, from oil and gas to chemical processing. These valves are designed to regulate the flow rate, pressure, ...
Exploring the Latest Innovations from Leading Mud Pump Manufacturers2023/06/07Mud pumps play a vital role in various industries, including oil and gas, mining, and construction. These pumps are designed to handle heavy-duty tasks, such as drilling and circulating drilling fluid...
Essential Maintenance and Safety Tips for Fishing Drilling Tools2023/06/05Fishing drilling tools are essential assets in wellbore recovery and drilling operations. To ensure their optimal performance and longevity, proper maintenance and adherence to safety protocols are cr...
The Benefits of Using Fishing Drilling Tools for Wellbore Recovery2023/06/04In drilling operations, encountering challenges such as stuck pipe incidents, lost tools, or wellbore debris can significantly impact progress and efficiency. When faced with these situations, fishing...
How to Choose the Right Fishing Drilling Tools for Your Project?2023/06/03Choosing the right fishing drilling tools is crucial for the success and efficiency of drilling projects. With a wide variety of tools available in the market, selecting the appropriate ones can be a ...
The Unsung Hero: Exploring the Importance of a Fluid End Seat Puller2023/06/01When it comes to the maintenance of pumps in industries such as oil and gas, mining, and construction, there is an unsung hero that plays a crucial role: the fluid end seat puller. This often-overlook...
What Are the Factors That Determine the Performance of a Mud Pump?2023/05/29Mud pumps are widely used in many fields such as petroleum drilling, chemical, food, pharmaceuticals, etc, due to their simple structure, stable operation, low vibration, and low noise. When you buy t...
Why Does Mud Pump Shake During Operation?2023/05/15Mud pump refers to the mechanical device that transports mud or water washing liquid into the borehole during drilling. Mud pump is an important component of drilling equipment.In the commonly used po...
Detailed Parameters and How to Use Mud Pump Special Water Hose2023/05/08The mud pump dedicated hose, also known as the slurry hose, is a main component used in conjunction with mud pumps, and has been widely used in water conservancy projects, fire projects, deep foundati...
Precautions and Maintenance for Mud Pump Usage2023/05/01Mud pump is a popular concept for a wide range of pumps, but the pump type involved varies depending on different regions and habits. In most cases, mud pumps refer to the pumps used in the petroleum ...
The Working Principles and Classification of Plug Valves2023/03/01Plug valve is a type of quick switch direct valve. Due to the wiping effect between the rotating sealing faces, it can completely prevent contact with the flowing medium when fully open, making it sui...
What is the Reason for the High Temperature of the Mud Pump Engine?2023/02/16The role of the mud pump in process control is to receive the control signal from the regulator or computer. The mud pump changes the flow rate of the regulated medium so that the regulated parameters...
How Important is the Drilling Mud Pump?2023/02/09Many drilling industry experts will compare drilling engineering to the body movement mechanism of adults. The blood vessels of the human body are the boreholes of drilling, blood is like mud, and the...
Applications and Installation of Spherical Taper Roller Bearing2023/02/01Spherical taper roller bearings have double rows of rollers, with one shared spherical raceway on the outer ring and two raceways that are tilted at an angle relative to the bearing axis on the inner ...
Practical Knowledge of Drilling Mud Pump2023/01/11The highest stage of drilling technology development is automatic drilling. The so-called automated drilling is: the whole drilling process relies on sensors to measure various parameters, and uses co...
Prospects for New Oil Drilling Machine2022/12/01According to the analysis of existing technology and the application of drilling equipment, the new technology research and application of oil drilling equipment drilling machines will mainly focus on...
Application Status of Oil Drilling Machines2022/11/15Oil drilling machine electric drive technologyThe origin of power electronics technology can be traced back to the late 1950s and early 1960s, and it began to be widely used in the power drive industr...
The Output Power of Mud Pump is Related to the Opening of Valve.2022/11/01Fix the support of the mud pump on a suitable surface to prevent damage from vibrations. If the suction of the device is fine initially but becomes insufficient after some use, it is probably due to i...
The Centrifugal Oil Pump Has a Simple Structure and is Easy to Operate2022/09/08The centrifugal oil pump is a self-priming centrifugal pump, which has the advantages of simple structure, convenient operation, stable operation, easy maintenance, high efficiency, long life, and str...
The Working Principle and Function of the Choke Valve2022/08/02Most of the throttling elements of the choke valve use a needle valve structure; some are cylindrical rubber, and the outer wall of the rubber cylinder is driven by gas and liquid to change the size o...
Technical Requirements for Main Equipment of Oilfield Drilling2022/07/15Oilfield drilling equipment for oil drilling is a set of combined units. Oilfield drilling equipment consists of derricks, winches, traveling blocks, hooks, turntables, drilling pumps, power units, so...
Structure and Function of End Thrust Bearing2022/07/081. Structural composition of end thrust bearingThe structure of end thrust bearing is different according to its type, but its main components are basically the same, generally composed of thrust head...
What Are the Four Classifications of oil Drilling Machine?2022/06/28With the continuous development of drilling production, the operating conditions of oil drilling rigs are becoming more and more diverse, and various types of drilling rigs have appeared accordingly. ...
Six Advantages of RUNDONG's Mud Pump2022/06/141. Mud pump can save energyThe selection of the mud pump is often larger than the actual need. From the characteristics of the mud pump, it can be seen that the power of the mud pump is equal to the p...
Run East Mud Pump Six Advantages Analysis2022/04/281. Mud pump can save energyMud pump selection is often larger than the actual need, from the characteristics of the mud pump, it is known that the power of the mud pump is equal to the product of its ...
Why is the Mud Pump the Heart of Drilling2022/01/17In the drilling operation of the mud pump, the construction time is generally long, and the mud pump is used more frequently. The mud pump is also known as the heart of drilling, which shows that its ...
Choke Valve for Oil and Gas Drilling Industry2021/11/17The oil and gas choke valve is the core component of the well control device used in the choke manifold in the oil and gas industry. Its function is to maintain a certain casing pressure by opening an...
What Are the Factors That Cause Roller Bearing Slippage?2021/04/10Bearing scratches caused by roller bearing skidding is a common form of damage. Do you know what roller bearing skidding is? Why does the roller bearing slid? For these series of questions, roller bea...
Mud Pump Valve Body Valve Assembly2021/02/15Mud pump valve body valve assembly is a key component of the hydraulic end of the mud pump. The valve body assembly is composed of valve body, valve rubber, valve nut, guide frame, pressure cap, circl...
There Are Several Reasons for the Frequent Failure of Valve Springs2021/02/08The valve spring of the mud pump valve body determines the opening pressure of the valve, the valve flap stroke and the stability of the seal in the closed state. If these springs fail, the entire val...
Factors Causing Mud Pump Bearing to Burn out2021/02/01The drilling mud pump bearing is an important component to ensure the normal operation of the mud pump. It is one of the main accessories to ensure the power output of the mud pump. Although the parts...
Characteristics and Application of Horizontal Pump2021/01/04The horizontal pump uses the high-speed rotating impeller blades to drive the water to rotate and throw the water out to achieve the purpose of transportation. There are many types of horizontal centr...
Roller Bearing Types and Characteristics2020/12/22Ⅰ. Roller bearingsRoller bearing is a kind of rolling bearing, and it is one of the parts widely used in modern machinery. It relies on the rolling contact between the main components to support the ...
The difference Between High-speed Bearing and Ordinary Bearing2020/12/15High-speed bearings require precise dynamic balance of the rotating system where the bearing is located, and the shaft and seat hole where the bearing is installed should have dimensional accuracy and...
How to select hammer head coupling?2020/11/22The coupling is used to connect the shaft and the shaft so that they can rotate together and transmit torque. The two shafts connected by a coupling can only be separated after being disassembled afte...
What Conditions Should a Good Mud Pump Pony Rod Satisfy?2020/11/151. Brief introduction of mud pump pony rodMud pump pony rod is a downhole equipment for pumping oil, and mud pump pony rod is a common downhole device that is driven by a pumping unit to pump crude oi...
What Are the Drilling Tools Commonly Used in Oil Exploitation?2020/11/08Ⅰ. The importance of oil well drilling toolsOil exploitation is an arduous project. Many mining tools are needed during oil exploitation. Oil well drilling tool is a common one. So what are the commo...
Integrity Management and Risk Control of Oil Well Drilling Tools2020/11/01In the complex oil and gas well drilling process such as deep wells, ultra-deep wells, horizontal wells and branch wells, the downhole drilling tools are prone to fractures and punctures due to the co...
What Affects the Quality of Dampeners2020/10/07In our daily life, some products we usually use will open and close when we use them. At this time, the dampener acts as a buffer. We all know that there are many types of pulsation dampeners. But no ...
Knowledge about Oilfield Drilling Equipment2020/10/01Oilfield drilling equipment usually consists of six systems:1. Power system Oilfield drilling equipment is like a small factory with high mobility and independent operation. Most of the working system...
What Causes the Mud Pump Crankshaft to Burn Out2020/09/25Mud pump is widely used in oil drilling industry. It has been proved by many practical tests that it has great advantages in product performance, quality characteristics and after-sales service. Takin...
Introduction of Bearing Roller Tapered2020/09/19Bearing roller tapered mainly bears radial and axial combined load. The bearing capacity depends on the raceway angle of the outer ring. With larger angle comes greater bearing capacity. This kind of ...
Selection Code for Valves2020/09/16In the mud pump, the mud pump valve is the control element, and its main function is to isolate the equipment and pipeline system, regulate the flow, prevent backflow, adjust and discharge pressure.Th...
Why are Still Pulses There with the Pulsation Dampeners Installed2020/09/13The metering pump will produce pipeline pulse in the process of operation.In order to eliminate the pipeline pulse, it is necessary to install pulsation dampeners to achieve good results. Recently, ma...
Some Problems in Bearing Roller Tapered Device2020/08/27Bearing roller tapered are generally separable, that is, cone assembly, consisting of the inner ring with roller and cage assembly, can be mounted separately from the cup (outer ring).Bearing roller ...
Principle, Type and Function of Pulsation Dampeners2020/07/25Pulsation dampener is a kind of pressure vessel used to eliminate liquid pressure fluctuation or flow pulsation in the pipeline. It can stabilize fluid pressure and flow, eliminate pipeline vibration,...
The Heart of Drilling Engineering: Drilling Pump2020/07/22If the whole drilling operation process is compared to human life activities, then the drilling pump, like the human heart, is the source of continuous circulation of drilling fluid from the surface t...
Usage of Tapered Roller Bearing2020/07/19Although the quality of small tapered roller bearings are good, the rolling bearing is a precision component, and its use should be carried out carefully. No matter how high-performance bearings are u...
Factors Affecting the Accuracy of Tapered Roller Bearings2020/07/13Precision tapered roller bearings mainly include two aspects, one is the dimensional accuracy, the other is the rotational accuracy. The former is required after the bearing is installed. The rotation...
Non Metallic Wear-resistant Mud Pump2020/07/10The non-metal wear-resistant mud pump is developed by our company according to the users' construction situation and the performance characteristics of the PN seriesmud pump wear plate in use. The...
Classification and Code of Mud Pump Pony Rod2020/07/07The mud pump pony rod is a long and thin rod of pumping well. It is connected to a polished rod on the top and a pump at the bottom to transfer power.The length of a mud pump pony rod is 7.6 or 8 mete...
Popular Industrial Triplex Pump2020/07/04Industrial triplex pumps are designed for a variety of high-pressure cleaning applications. The structure of the pump is die-casting crankcase, forged brass head, internal components include solid cer...
Characteristics and Application of High Accuracy Pressure Gauge2020/07/01The high accuracy pressure gauge is a kind of high precision pointer pressure gauge with a spring tube as a measuring element. It is mainly used for continuous measurement, calibration, detection, ver...
Performance and Overview of Mud Pump2020/06/19Mud pump refers to the machinery that delivers mud or water and other flushing fluid to the borehole during drilling. Mud pump is an important part of drilling equipment.Mud pump is commonly used in t...
Introduction and Cassification of Choke Valve2020/06/16Choke valve is the core component of well control device used in choke manifold in oil and natural gas industry. Its function is to maintain a certain casing pressure with the help of its opening and ...
Unleashing Efficiency: Leading Mud Pump Parts Manufacturers Revolutionize the Market2023/07/24In the world of drilling operations, mud pumps play a vital role in maintaining the fluid circulation system. These powerful machines require high-quality parts to ensure efficient and reliable perfor...
What Are the Factors That Determine the Performance of a Mud Pump?2023/05/29Mud pumps are widely used in many fields such as petroleum drilling, chemical, food, pharmaceuticals, etc, due to their simple structure, stable operation, low vibration, and low noise. When you buy t...
The Working Principles and Classification of Plug Valves2023/03/01Plug valve is a type of quick switch direct valve. Due to the wiping effect between the rotating sealing faces, it can completely prevent contact with the flowing medium when fully open, making it sui...
What is the Reason for the High Temperature of the Mud Pump Engine?2023/02/16The role of the mud pump in process control is to receive the control signal from the regulator or computer. The mud pump changes the flow rate of the regulated medium so that the regulated parameters...
How Important is the Drilling Mud Pump?2023/02/09Many drilling industry experts will compare drilling engineering to the body movement mechanism of adults. The blood vessels of the human body are the boreholes of drilling, blood is like mud, and the...
Applications and Installation of Spherical Taper Roller Bearing2023/02/01Spherical taper roller bearings have double rows of rollers, with one shared spherical raceway on the outer ring and two raceways that are tilted at an angle relative to the bearing axis on the inner ...
Importance of Mud Pump Spares in Daily Life and Analysis of Their Performance Impacts2023/01/15Mud pump spares are one of the three major components of a drilling rig and are the key equipment in the drilling fluid circulation system.During drilling, the drilling pump transports high viscosity,...
Matters Needing Attention in the Installation and Maintenance of Choke Valve2023/01/04Oil and gas choke valve is a valve that controls fluid flow by changing the throttle section or throttle length. A one-way choke valve can be combined by connecting the choke valve and the one-way val...
Lubrication Difference Analysis Between Ordinary Bearings and High-speed Bearings2022/12/13Ⅰ. Ordinary bearing lubrication1. The purpose of ordinary bearing lubrication(1) Prolong fatigue life. The rolling fatigue life of the bearing is extended when the rolling contact surface is well lub...
Power Supply Mode and Cast Iron Material Classification of Mud Pump Accessories2022/09/151. Three power supply modes for mud pump accessories(1) The commonly used dry battery has a large internal resistance, and the current provided by itself is small, and a large part of the voltage is c...
The Centrifugal Oil Pump Has a Simple Structure and is Easy to Operate2022/09/08The centrifugal oil pump is a self-priming centrifugal pump, which has the advantages of simple structure, convenient operation, stable operation, easy maintenance, high efficiency, long life, and str...
The Working Principle and Function of the Choke Valve2022/08/02Most of the throttling elements of the choke valve use a needle valve structure; some are cylindrical rubber, and the outer wall of the rubber cylinder is driven by gas and liquid to change the size o...
Technical Requirements for Main Equipment of Oilfield Drilling2022/07/15Oilfield drilling equipment for oil drilling is a set of combined units. Oilfield drilling equipment consists of derricks, winches, traveling blocks, hooks, turntables, drilling pumps, power units, so...
Structure and Function of End Thrust Bearing2022/07/081. Structural composition of end thrust bearingThe structure of end thrust bearing is different according to its type, but its main components are basically the same, generally composed of thrust head...
What Are the Four Classifications of oil Drilling Machine?2022/06/28With the continuous development of drilling production, the operating conditions of oil drilling rigs are becoming more and more diverse, and various types of drilling rigs have appeared accordingly. ...
Six Advantages of RUNDONG's Mud Pump2022/06/141. Mud pump can save energyThe selection of the mud pump is often larger than the actual need. From the characteristics of the mud pump, it can be seen that the power of the mud pump is equal to the p...
Run East Mud Pump Six Advantages Analysis2022/04/281. Mud pump can save energyMud pump selection is often larger than the actual need, from the characteristics of the mud pump, it is known that the power of the mud pump is equal to the product of its ...
Choke Valve for Oil and Gas Drilling Industry2021/11/17The oil and gas choke valve is the core component of the well control device used in the choke manifold in the oil and gas industry. Its function is to maintain a certain casing pressure by opening an...
What Are the Advantages of High Precision Crossing Roller Bearings Compared with Traditional Bearings?2021/07/15Today, with the rapid development of social science and technology, not only science and technology are changing with each passing day, but our bearing industry is also undergoing tremendous changes. ...
What Are the Factors That Cause Roller Bearing Slippage?2021/04/10Bearing scratches caused by roller bearing skidding is a common form of damage. Do you know what roller bearing skidding is? Why does the roller bearing slid? For these series of questions, roller bea...
The Necessity of Strengthening the Management of Oilfield Drilling Electrical Equipment2021/03/08In the current human society, fossil fuels such as oil and natural gas are still the main energy sources. Therefore, scientific and technological research on the exploitation of fossil energy is still...
The Factors and Preventive Measures for the Leakage of Mud Pump Valve Box2021/02/22A mud pump is a machine that transports flushing fluid such as mud or water to the borehole during drilling, and is an important part of drilling equipment. Its main function is to inject the mud into...
Factors Causing Mud Pump Bearing to Burn out2021/02/01The drilling mud pump bearing is an important component to ensure the normal operation of the mud pump. It is one of the main accessories to ensure the power output of the mud pump. Although the parts...
Characteristics and Application of Horizontal Pump2021/01/04The horizontal pump uses the high-speed rotating impeller blades to drive the water to rotate and throw the water out to achieve the purpose of transportation. There are many types of horizontal centr...
The difference Between High-speed Bearing and Ordinary Bearing2020/12/15High-speed bearings require precise dynamic balance of the rotating system where the bearing is located, and the shaft and seat hole where the bearing is installed should have dimensional accuracy and...
How to select hammer head coupling?2020/11/22The coupling is used to connect the shaft and the shaft so that they can rotate together and transmit torque. The two shafts connected by a coupling can only be separated after being disassembled afte...
What Conditions Should a Good Mud Pump Pony Rod Satisfy?2020/11/151. Brief introduction of mud pump pony rodMud pump pony rod is a downhole equipment for pumping oil, and mud pump pony rod is a common downhole device that is driven by a pumping unit to pump crude oi...
What Are the Drilling Tools Commonly Used in Oil Exploitation?2020/11/08Ⅰ. The importance of oil well drilling toolsOil exploitation is an arduous project. Many mining tools are needed during oil exploitation. Oil well drilling tool is a common one. So what are the commo...
Integrity Management and Risk Control of Oil Well Drilling Tools2020/11/01In the complex oil and gas well drilling process such as deep wells, ultra-deep wells, horizontal wells and branch wells, the downhole drilling tools are prone to fractures and punctures due to the co...
What Affects the Quality of Dampeners2020/10/07In our daily life, some products we usually use will open and close when we use them. At this time, the dampener acts as a buffer. We all know that there are many types of pulsation dampeners. But no ...
Knowledge about Oilfield Drilling Equipment2020/10/01Oilfield drilling equipment usually consists of six systems:1. Power system Oilfield drilling equipment is like a small factory with high mobility and independent operation. Most of the working system...
What Causes the Mud Pump Crankshaft to Burn Out2020/09/25Mud pump is widely used in oil drilling industry. It has been proved by many practical tests that it has great advantages in product performance, quality characteristics and after-sales service. Takin...
Introduction of Bearing Roller Tapered2020/09/19Bearing roller tapered mainly bears radial and axial combined load. The bearing capacity depends on the raceway angle of the outer ring. With larger angle comes greater bearing capacity. This kind of ...
Selection Code for Valves2020/09/16In the mud pump, the mud pump valve is the control element, and its main function is to isolate the equipment and pipeline system, regulate the flow, prevent backflow, adjust and discharge pressure.Th...
Some Problems in Bearing Roller Tapered Device2020/08/27Bearing roller tapered are generally separable, that is, cone assembly, consisting of the inner ring with roller and cage assembly, can be mounted separately from the cup (outer ring).Bearing roller ...
Common Causes and Solutions of Hydraulic Cylinder Piston Rod Stick-slip Phenomenon2020/08/06Common causes of the hydraulic cylinder piston rod stick-slip phenomenon:1. Coaxiality errorIn the hydraulic cylinder, coaxiality error could result in the unstable running speed of the cylinder.2. Co...
Principle, Type and Function of Pulsation Dampeners2020/07/25Pulsation dampener is a kind of pressure vessel used to eliminate liquid pressure fluctuation or flow pulsation in the pipeline. It can stabilize fluid pressure and flow, eliminate pipeline vibration,...
The Heart of Drilling Engineering: Drilling Pump2020/07/22If the whole drilling operation process is compared to human life activities, then the drilling pump, like the human heart, is the source of continuous circulation of drilling fluid from the surface t...
Usage of Tapered Roller Bearing2020/07/19Although the quality of small tapered roller bearings are good, the rolling bearing is a precision component, and its use should be carried out carefully. No matter how high-performance bearings are u...
Factors Affecting the Accuracy of Tapered Roller Bearings2020/07/13Precision tapered roller bearings mainly include two aspects, one is the dimensional accuracy, the other is the rotational accuracy. The former is required after the bearing is installed. The rotation...
Non Metallic Wear-resistant Mud Pump2020/07/10The non-metal wear-resistant mud pump is developed by our company according to the users' construction situation and the performance characteristics of the PN seriesmud pump wear plate in use. The...
Classification and Code of Mud Pump Pony Rod2020/07/07The mud pump pony rod is a long and thin rod of pumping well. It is connected to a polished rod on the top and a pump at the bottom to transfer power.The length of a mud pump pony rod is 7.6 or 8 mete...
Popular Industrial Triplex Pump2020/07/04Industrial triplex pumps are designed for a variety of high-pressure cleaning applications. The structure of the pump is die-casting crankcase, forged brass head, internal components include solid cer...
Characteristics and Application of High Accuracy Pressure Gauge2020/07/01The high accuracy pressure gauge is a kind of high precision pointer pressure gauge with a spring tube as a measuring element. It is mainly used for continuous measurement, calibration, detection, ver...
Performance and Overview of Mud Pump2020/06/19Mud pump refers to the machinery that delivers mud or water and other flushing fluid to the borehole during drilling. Mud pump is an important part of drilling equipment.Mud pump is commonly used in t...
Introduction and Cassification of Choke Valve2020/06/16Choke valve is the core component of well control device used in choke manifold in oil and natural gas industry. Its function is to maintain a certain casing pressure with the help of its opening and ...
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