Simple blowout preventer of drilling equipment and drilling equipment

Abstract

The application discloses a simple blowout preventer of a drilling equipment and the drilling equipment, relates to the oil and gas exploration technical field, and the simple blowout preventer is detachably connected to a wellbore.The simple blowout preventer comprises a connecting main body, a flow guide main body, at least one pipeline branch, and an annular plug.The connecting main body is installed in the middle region or the opening position of the wellbore, and the circumferential side of the connecting main body is sealingly connected to the wellbore.The flow guide main body is connected to the connecting main body or integrally arranged with the connecting main body.The pipeline branch is arranged on the circumferential side of the flow guide main body and is in communication with a flow guide cavity.A valve structure is arranged on each pipeline branch.The annular plug is detachably connected to a communication hole, and the annular plug can be disassembled relative to the communication hole through a drilling tool.The annular plug is installed in the drilling tool and is set in the communication hole through the drilling tool, and the overflowed oil or gas is pressure released and shunted through the pipeline branch.The simple blowout preventer can realize the rapid control and safe treatment of the overflow of the wellbore through the detachable connection to the wellbore, the sealing flow guide, the pressure release and shunting of the pipeline branch, and the setting of the annular plug in the communication hole through the drilling tool.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil and gas exploration, and particularly relates to a simple blowout preventer of a drilling equipment and the drilling equipment. BACKGROUND

[0002] In the related technical field, in the conventional drilling operation, the blowout preventer is a large integrated device, which has a complex structure and high cost, and is difficult to adapt to small drilling platforms or emergency rescue scenes. When overflow phenomenon occurs in the wellbore, the conventional blowout preventer has a cumbersome installation process and slow response speed, which is easy to delay the well control opportunity, and the fixed connection mode leads to poor flexibility in the use of low-pressure oil and gas layers or temporary drilling operations, thereby increasing the non-production time and safety risk.

[0003] In the prior art, although some simple blowout preventers attempt to simplify the structure, they generally have the problems of insufficient sealing performance and single pressure relief and shunting function. For example, the manually controlled gate valve type device is laborious to operate and has slow closing speed, and cannot quickly cut off the overflow channel; some devices lack effective oil and gas separation and recovery mechanisms, and direct discharge of overflow materials can cause environmental pollution, and lack real-time monitoring and intelligent control modules, which are difficult to meet the dual requirements of safety and environmental protection in modern drilling operations. SUMMARY

[0004] The present application can provide a simple blowout preventer of a drilling equipment and the drilling equipment, which realizes rapid control and safe treatment of wellbore overflow through detachable connection of the wellbore, sealing and flow guiding, pipeline branch pressure relief and shunting, and drill pipe setting and sealing of the annular plug.

[0005] In a first aspect, the present application provides a simple blowout preventer of a drilling equipment, which is detachably connected to a wellbore in which overflow phenomenon occurs, and comprises:

[0006] A connecting main body is installed at a middle region or an opening position of the wellbore, and a peripheral side of the connecting main body is sealingly connected to the wellbore;

[0007] A flow guiding main body is connected to the connecting main body or integrally arranged, and has a flow guiding cavity in communication with the wellbore, and a communication hole is arranged on a side of the flow guiding main body away from the connecting main body;

[0008] At least one pipeline branch is arranged on a peripheral side of the flow guiding main body and in communication with the flow guiding cavity, and a valve structure is arranged on each pipeline branch;

[0009] An annular plug is detachably connected to the communication hole, and the annular plug can be disassembled relative to the communication hole through a drill pipe;

[0010] In the case where overflow phenomenon occurs in the wellbore, the annular plug is installed on the drill pipe and is set in the communication hole through the drill pipe, and the overflowed oil or gas is relieved and shunted through the pipeline branch.

[0011] The simple blowout preventer is detachably connected to the wellbore when overflow occurs in some wellbores, plays a role in controlling the overflow situation and ensuring the safety of the operation. Through its special structure, the overflow oil or gas can be reasonably treated, avoiding more serious consequences caused by overflow.

[0012] The connecting body is installed in the middle region or opening position of the wellbore and is sealingly connected with the wellbore, the flow guide body is connected with or integrally provided with the connecting body, the flow guide cavity thereof is in communication with the wellbore and has a communication hole on the side away from the connecting body, the pipeline branch is provided on the side of the flow guide body and is in communication with the flow guide cavity and has a valve structure, and the annular plug is detachably connected with the communication hole and can be disassembled and assembled by the drilling tool. When overflow occurs in the wellbore, the annular plug is installed and set by the drilling tool in the communication hole, and the overflow oil or gas can be relieved and shunted through the pipeline branch, effectively controlling the overflow situation and ensuring the safety and stability of the wellbore operation.

[0013] In some examples, the annular plug is a plug valve, which includes a first connecting part, a valve body and a second connecting part connected in sequence, the first connecting part, the valve body and the second connecting part are in communication, and the valve body has an openable and closable valve core therein.

[0014] The first connecting part has an internal thread, and the first connecting part is detachably connected to the drill pipe of the drilling tool; the second connecting part has an external thread, and the second connecting part is detachably connected to the communication hole.

[0015] Through this design, the plug valve can be stably installed between the drilling tool and the communication hole, effectively preventing the occurrence of wellbore overflow. When it is necessary to open or close the plug valve, the valve core only needs to be operated to realize the on-off of the fluid, which is simple and reliable in operation. At the same time, since the plug valve adopts a detachable connection mode, it is more convenient to maintain and replace, reducing the operation cost and time. In addition, the material and manufacturing process of the plug valve are also strictly selected and optimized to ensure that it can operate stably for a long time in a harsh downhole environment, providing reliable safety protection for drilling operations.

[0016] In some examples, the valve core of the plug valve is a spherical valve core, and the spherical valve core is provided with a connecting end on the side close to the outer peripheral surface of the plug valve, and the connecting end can be connected with an adjusting tool.

[0017] By providing the spherical valve core and the connecting end, when it is necessary to adjust the opening and closing state of the plug valve, the adjusting tool can be used in cooperation with the connecting end to more conveniently and accurately control the action of the valve core. This design further improves the operation convenience and reliability of the plug valve, which is especially suitable for the strict requirements of drilling equipment on fluid control under complex working conditions, and helps to improve the overall efficiency and safety of drilling operations.

[0018] In some examples, the plug valve is a whole cone, and the cross-sectional size of the second connecting part is smaller than that of the first connecting part.

[0019] The cone-shaped design makes the plug valve better fit with the matching equipment during installation, reduces the gap during installation, and reduces the risk of fluid leakage. At the same time, the feature that the cross-sectional size of the second connecting part is smaller than that of the first connecting part not only helps to reduce the overall weight of the plug valve, making it easier to carry and install, but also saves material costs to some extent. Moreover, this structure can form a certain pressure difference when the fluid passes through, which helps to more stably control the flow of the fluid, further improving the reliability and stability of the drilling equipment during operation.

[0020] In some examples, at least one of the internal thread and the external thread is a threaded structure with a taper.

[0021] The use of a threaded structure with a taper enables the first connecting part of the plug valve to be more tightly and stably connected with the drill pipe, and the second connecting part to be more tightly and stably connected with the communication hole. During installation, as the thread is screwed in, the taper design causes the connection parts to gradually fit together, effectively reducing the gap at the connection, thereby greatly reducing the possibility of fluid leakage and further improving the safety and sealing of drilling operations.

[0022] In some examples, the first connecting part and the second connecting part are both provided with sealing rings at the connection positions.

[0023] The sealing rings provided at the connection positions of the first connecting part and the second connecting part can further enhance the sealing performance between the plug valve and the drill pipe and the communication hole. These sealing rings are usually made of materials that are resistant to high temperatures, corrosion, and have good elasticity, and can maintain stable sealing effect for a long time in harsh downhole environments.

[0024] In some examples, a one-way valve is provided near the communication hole of the flow guide main body, and the drill pipe can push open the one-way valve and disable it.

[0025] In the case of overflow in the wellbore, the one-way valve can block the oil or gas flowing towards the communication hole, and force the overflowed oil or gas to be discharged and diverted through the pipeline branch.

[0026] The one-way valve is arranged in the above manner, which not only ensures that the drilling tool can smoothly open the one-way valve for operation in the normal drilling process, but also automatically closes quickly in the case of overflow and other abnormal conditions in the wellbore, effectively preventing further leakage of oil or gas. The plugging effect is reliable, and it can withstand a certain pressure to ensure additional safety for drilling operations in emergency situations. Moreover, the oil or gas overflowed through the pipeline branch is discharged, avoiding damage to equipment due to excessive pressure, further improving the safety and stability of drilling operations.

[0027] In some examples, a pull ring structure is arranged on the pipeline branch.

[0028] The presence of the pull ring structure allows the operator to effectively lift and flexibly transfer the entire device in a very convenient manner using hooks or other binding tools. When the number of pipeline branches is two or more, this design not only significantly improves the stability of lifting, but also ensures that the entire device remains more balanced during lifting, thereby greatly reducing the risk of device damage due to uneven stress, further improving the safety and efficiency of operation.

[0029] In some examples, the side of the pipeline branch away from the flow guide body is connected to the overflow reservoir through a pipeline.

[0030] By connecting the side of the pipeline branch away from the flow guide body to the overflow reservoir, effective collection and treatment of the overflowed oil or gas is achieved. When overflow occurs in the wellbore, the overflowed oil or gas is smoothly guided into the overflow reservoir after passing through the flow guide body and the pipeline branch. The overflow reservoir usually has a large capacity and good sealing performance, which can safely store these overflow substances and prevent direct leakage into the surrounding environment to cause pollution.

[0031] In some examples, an oil-gas separation device is arranged in the overflow reservoir, and the overflow reservoir has multiple sub-chambers for storing oil or gas.

[0032] The oil-gas separation device arranged in the overflow reservoir can efficiently separate and process the collected overflow substances. In drilling operations, the overflowed substances often contain a mixture of oil and gas. If not separated directly for storage or processing, it not only occupies a large amount of storage space, but also may affect the subsequent processing effect and resource recovery efficiency. The oil-gas separation device can effectively separate oil and gas through specific separation principles and technologies, allowing them to enter different sub-chambers of the overflow reservoir for storage.

[0033] In some examples, a flow meter and / or a pressure sensor are arranged in each pipe branch; or the valve structure comprises at least one of a solenoid valve, a check valve, a relief valve, a stop valve, a gate valve, a butterfly valve, and a regulating valve.

[0034] By arranging a flow meter and / or a pressure sensor in each pipe branch, the fluid flow and pressure conditions in the pipe can be monitored in real time, thereby providing accurate data support for the operating personnel to timely adjust the operating parameters of the drilling equipment, and ensuring the safe and efficient performance of the drilling operation. By using at least one of a solenoid valve, a check valve, a relief valve, a stop valve, a gate valve, a butterfly valve, and a regulating valve in the valve structure, the appropriate valve type can be flexibly selected according to different working conditions and requirements, precise control and adjustment of the fluid in the pipe can be achieved, and the performance and reliability of the drilling equipment can be further improved.

[0035] In a second aspect, the present application provides a drilling equipment comprising the simple blowout preventer described above.

[0036] The drilling equipment of the present application has the advantages of reasonable structure and reliable performance due to the simple blowout preventer described above. During normal drilling, the plug valve and check valve in the simple blowout preventer work cooperatively without hindering the normal operation of the drilling tool, ensuring efficient and continuous drilling. When overflow or other abnormal conditions occur in the wellbore, the simple blowout preventer can quickly come into play, the plug valve is stably installed to effectively prevent overflow of the wellbore, the check valve is automatically closed to block oil or gas and guide it to be discharged through the pipe branch, the flow meter and pressure sensor provide real-time feedback data, and the valve structure precisely adjusts the fluid, thereby ensuring the safety of the drilling operation in all directions. In addition, the overflow reservoir and the oil-gas separation device inside it are designed to properly collect, separate, and process the overflow materials, which not only avoids environmental pollution but also realizes effective recycling and reuse of resources. The drilling equipment integrated with the simple blowout preventer greatly improves the safety, stability, and economy of the drilling operation, and provides more reliable equipment support for oil and gas exploration and other drilling work. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the present application or prior art, the drawings needed to be used in the examples or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some examples of the present application, and other drawings can be obtained by those skilled in the art without creative effort.

[0038] Figure 1 FIG. 1 is a structural schematic diagram of a simple blowout preventer of a drilling equipment in an example of the present application;

[0039] Figure 2Figure 2 is a structural schematic diagram of a simple blowout preventer of a drilling rig in an example of the present application;

[0040] Figure 3 Figure 3 is a structural schematic diagram of a simple blowout preventer of a drilling rig in an example of the present application;

[0041] Figure 4 Figure 4 is a structural schematic diagram of a simple blowout preventer of a drilling rig in an example of the present application;

[0042] Figure 5 Figure 5 is a structural sectional schematic diagram of a ring-shaped plug as a plug valve in an example of the present application;

[0043] Figure 6 Figure 6 is another structural schematic diagram of a ring-shaped plug as a plug valve in an example of the present application;

[0044] Figure 7 Figure 7 is a structural schematic diagram of a simple blowout preventer in an example of the present application, in which a pipeline branch is connected after an overflow reservoir.

[0045] Reference signs:

[0046] 100, connection body; 200, flow guide body; 210, flow guide cavity; 220, communication hole; 300, pipeline branch; 310, valve structure; 320, pull ring structure; 400, ring-shaped plug; 410, first connection part; 411, internal thread; 420, valve body; 421, spherical valve core; 422, connection end; 430, second connection part; 431, external thread; 500, overflow reservoir. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of the present application clearer and more apparent, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0048] In order to solve the above technical problems, please refer to Figures 1-7 The present application proposes a simple blowout preventer of a drilling rig, which can realize rapid control and safe treatment of wellbore overflow by detachable connection of the wellbore, sealing of the flow guide, pressure relief and shunting of the pipeline branch 300, and setting of the ring-shaped plug 400 of the drilling tool.

[0049] Referring to Figures 1-4 In some examples, the simple blowout preventer is detachably connected to the wellbore where overflow phenomenon occurs, and includes a connection body 100, a flow guide body 200, at least one pipeline branch 300, and a ring-shaped plug 400.

[0050] The connecting body 100 is installed at the middle region or opening position of the wellbore, and the peripheral side of the connecting body 100 is sealingly connected with the wellbore. The flow guide body 200 is connected with the connecting body 100 or integrally arranged, and the flow guide body 200 has a flow guide cavity 210 in communication with the wellbore, and the side of the flow guide body 200 away from the connecting body 100 is provided with a communication hole 220. At least one pipeline branch 300 is arranged at the peripheral side of the flow guide body 200 and in communication with the flow guide cavity 210, and each pipeline branch 300 is provided with a valve structure 310. The annular plug 400 is detachably connected with the communication hole 220, and the annular plug 400 can be disassembled relative to the communication hole 220 by means of the drilling tool.

[0051] In the case that overflow phenomenon occurs in the wellbore, the annular plug 400 is installed on the drilling tool and is set in the communication hole 220 by means of the drilling tool, and the overflowed oil or gas is discharged and branched by means of the pipeline branch 300.

[0052] In the case that overflow phenomenon occurs in some wellbores, the simple blowout preventer is detachably connected with the wellbore, and plays a role in controlling the overflow condition and guaranteeing the safety of operation. Through the special structure, the overflowed oil or gas can be reasonably treated, and more serious consequences caused by overflow can be avoided.

[0053] The connecting body 100 is installed at the middle region or opening position of the wellbore and is sealingly connected with the wellbore. The flow guide body 200 is connected with the connecting body 100 or integrally arranged, and the flow guide cavity 210 of the flow guide body 200 is in communication with the wellbore and has a communication hole 220 at the side away from the connecting body 100. The pipeline branch 300 is arranged at the peripheral side of the flow guide body 200 and is in communication with the flow guide cavity 210 and has a valve structure 310. The annular plug 400 is detachably connected with the communication hole 220 and can be disassembled by means of the drilling tool. In the case that overflow phenomenon occurs in the wellbore, the annular plug 400 is installed on the drilling tool and is set in the communication hole 220 by means of the drilling tool, and the overflowed oil or gas can be discharged and branched by means of the pipeline branch 300, so that the overflow condition is effectively controlled, and the safety and stability of the wellbore operation are guaranteed.

[0054] The present application can realize the rapid control and safe treatment of the overflow of the wellbore by means of detachably connecting the wellbore, sealingly guiding, discharging and branching by means of the pipeline branch 300, and setting the annular plug 400 by means of the drilling tool.

[0055] In the above structure, the connecting body 100 is installed at the middle region or opening position of the wellbore, and the peripheral side of the connecting body 100 is combined with the wellbore by means of a sealing connection mode. Such arrangement mode can stably and firmly connect the whole simple blowout preventer on the wellbore, so as to ensure that the sealing performance of the connection reaches a better state, effectively prevent the leakage of the substances in the wellbore, and guarantee the safety and environmental protection of the wellbore operation.

[0056] The flow guide body 200 is connected with the connecting body 100 by a fixing member, or the flow guide body 200 and the connecting body 100 are integrally arranged. The flow guide body 200 is internally designed with a flow guide cavity 210 in communication with the wellbore. A communication hole 220 is arranged on the side of the flow guide body 200 away from the connecting body 100. The communication hole 220 is used to facilitate the connection of the annular plug 400, and can stabilize the oil or gas overflowing from the wellbore in the flow guide cavity 210, thereby providing a necessary channel for subsequent pressure relief and flow distribution, and ensuring the stability of the pressure in the wellbore and the effective flow distribution of the material.

[0057] The pipeline branch 300 is arranged on the side of the flow guide body 200 and is in communication with the flow guide cavity 210. Each pipeline branch 300 is equipped with a valve structure 310. The valve structure 310 can effectively relieve the pressure and distribute the oil or gas in the flow guide cavity 210. In addition, the valve structure 310 can control the on-off state and flow rate of the pipeline branch 300, thereby realizing accurate regulation and control of the material flow in the wellbore.

[0058] The annular plug 400 is detachably connected to the communication hole 220. Its unique design allows it to be conveniently disassembled and assembled relative to the communication hole 220 by using a drilling tool.

[0059] When the wellbore overflows, the annular plug 400 can be quickly installed on the drilling tool and set on the communication hole 220 by the drilling tool, thereby effectively plugging the communication hole 220 and preventing the material in the wellbore from being directly sprayed out of the communication hole 220 in large quantities, thereby further improving the safety and controllability of the wellbore operation.

[0060] The simple blowout preventer of the present application has significant beneficial effects when dealing with wellbore overflow. These effects not only reflect the improvement in safety performance, but also have a profound impact on operation efficiency, cost control, and environmental protection. The beneficial effects of the simple blowout preventer are described in detail below.

[0061] From the perspective of safety performance, the design of the simple blowout preventer greatly enhances the safety during wellbore operations. In traditional wellbore operations, once overflow occurs, the pressure in the wellbore will rise sharply, and if not timely and effective control, it may lead to blowout and other serious accidents, posing a great threat to personnel safety and equipment. The simple blowout preventer includes a sealed connection between the connection main body 100 and the wellbore, a communication between the flow guide main body 200 and the wellbore, and the setting of the pipeline branch 300, forming an efficient pressure release and diversion system. When overflow occurs in the wellbore, the annular plug 400 can be quickly installed on the drilling tool and set in the communication hole 220 through the drilling tool, effectively preventing the direct spouting of overflow materials. At the same time, the overflow oil or gas is discharged and diverted through the pipeline branch 300, avoiding the excessive accumulation of pressure in the wellbore, thereby greatly reducing the probability of blowout and other accidents, and ensuring the safety of the operating personnel.

[0062] The simple blowout preventer also plays an important role in improving operation efficiency. In traditional wellbore operations, once overflow occurs, it often needs to be stopped for complex processing operations, which not only consumes a lot of time, but also may cause the operation to be interrupted or delayed due to improper handling. The introduction of the simple blowout preventer enables rapid and effective pressure control and diversion when overflow occurs, without the need for large-scale processing during shutdown. Operating personnel can flexibly adjust the speed and direction of pressure relief and diversion by operating the valve structure 310 on the pipeline branch 300, thereby quickly restoring the normal operation state of the wellbore. This efficient response not only shortens the time for handling overflow, but also improves the overall operation efficiency, gaining valuable time for the exploitation of oil and gas resources.

[0063] The simple blowout preventer also exhibits significant advantages in cost control. In traditional wellbore operations, in order to respond to overflow and other emergencies, a large number of professional equipment and personnel are often required, which undoubtedly increases the cost of operations. The design of the simple blowout preventer uses a detachable connection, making it easy to install on the wellbore where overflow occurs without the need for additional complex equipment support. At the same time, its simple structure and easy operation also reduce the skill level required for operating personnel, reducing labor costs. In addition, since the simple blowout preventer can effectively control overflow, it avoids additional costs such as equipment damage and environmental pollution caused by blowout and other accidents, further reducing the overall operation cost.

[0064] In addition to the beneficial effects of the above aspects, the simple blowout preventer also plays a positive role in environmental protection. In the exploitation of resources such as oil and natural gas, the overflow phenomenon is often accompanied by the leakage of a large amount of harmful substances such as oil or gas. If these substances cannot be effectively treated in time, they will cause serious pollution to the surrounding environment. The simple blowout preventer, through the setting of the flow guide main body 200 and the pipeline branch 300, can relieve the pressure and divert the overflowed oil or gas, avoiding the direct leakage of these harmful substances. At the same time, the operating personnel can also collect the leaked substances through the pipeline branch 300 for subsequent treatment, thereby minimizing the pollution to the environment. This environmentally friendly design concept not only meets the strict requirements of the current society for environmental protection, but also wins a good social reputation for the enterprise.

[0065] In addition, the detachable connection design of the simple blowout preventer also brings great flexibility and applicability. In different wellbore operation environments, the blowout preventer may need to be adjusted or replaced according to the actual situation. The detachable connection of the simple blowout preventer makes it easy to disassemble and reassemble, adapting to the operation needs of different wellbores. At the same time, this design also facilitates the maintenance and maintenance of the blowout preventer, prolonging its service life and further improving its economic benefits.

[0066] In summary, the simple blowout preventer has shown significant beneficial effects in dealing with wellbore overflow. It not only improves the safety, efficiency and environmental protection of the operation, but also reduces the operation cost, bringing considerable economic benefits to the enterprise. With the continuous development of the oil and natural gas resource exploitation industry, the simple blowout preventer is expected to become one of the indispensable important equipment in wellbore operation, providing strong guarantee for the sustainable and healthy development of the industry.

[0067] Referring to Figures 5-7 In some examples, the annular plug 400 is a plug valve, which includes a first connecting portion 410, a valve body 420 and a second connecting portion 430 connected in sequence, the first connecting portion 410, the valve body 420 and the second connecting portion 430 are communicated, and the valve body 420 has an openable and closable valve core inside;

[0068] The first connecting portion 410 has an internal thread 411, and the first connecting portion 410 is detachably connected to the drill pipe of the drilling tool. The second connecting portion 430 has an external thread 431, and the second connecting portion 430 is detachably connected to the communication hole 220.

[0069] Through this design, the plug valve can be firmly installed between the drilling tool and the communication hole 220, effectively preventing the occurrence of wellbore overflow phenomenon. When it is necessary to open or close the plug valve, only the valve core needs to be operated to realize the on-off of the fluid, which is simple and reliable to operate. At the same time, since the plug valve adopts a detachable connection mode, it is more convenient to maintain and replace, reducing the operation cost and time. In addition, the material and manufacturing process of the plug valve are also strictly selected and optimized to ensure that it can operate stably for a long time in the harsh downhole environment, providing reliable safety protection for drilling operations.

[0070] In practical application, the openable and closable valve core design of the plug valve is very critical. The valve core is made of high-strength and corrosion-resistant alloy material, which is precisely machined and specially treated to have excellent sealing performance and wear resistance. In the open state, a smooth channel is formed between the valve core and the inner wall of the valve body 420, ensuring that oil or gas can pass through smoothly; while in the closed state, the valve core tightly adheres to the inner wall of the valve body 420, effectively blocking the flow of fluid and preventing the leakage of substances in the wellbore.

[0071] The inner thread 411 of the first connecting part 410 is designed to perfectly match the outer thread 431 of the drilling tool drill pipe, which can quickly and firmly connect the plug valve to the drilling tool through a rotating installation method. This connection method is not only simple to install, but also can withstand a large tensile force and torque, ensuring that the plug valve will not loosen or fall off during drilling operations. The outer thread 431 of the second connecting part 430 is adapted to the inner thread 411 of the communication hole 220, which also uses a rotating installation method to firmly connect the plug valve to the communication hole 220. This double detachable connection design makes the plug valve more flexible and convenient during installation and removal, and can be quickly adjusted and replaced according to actual operation needs.

[0072] During drilling operations, the plug valve can adjust the opening of the valve core in real time according to the pressure and flow rate in the wellbore. When the pressure in the wellbore is normal, the valve core remains open to ensure normal circulation of drilling fluid and smooth discharge of oil and gas; when the wellbore has an overflow phenomenon, the operator can quickly operate the valve core to close it and prevent further ejection of overflow material. At the same time, through the valve structure 310 on the pipeline branch 300, the overflow oil or gas can be pressure relieved and diverted, ensuring that the pressure in the wellbore is stable within a safe range.

[0073] The detachable connection mode of the plug valve also brings great convenience for its maintenance and repair. After the drilling operation is completed, the plug valve can be detached from the drilling tool and the communication hole 220 for comprehensive inspection and repair. For worn or damaged parts, timely replacement can ensure that the performance of the plug valve is always in the best state. In addition, due to the relatively simple structure of the plug valve, maintenance personnel can quickly master its repair methods and skills, reducing maintenance costs and time.

[0074] With the continuous development of drilling technology and the increasing complexity of operating environment, higher requirements are put forward for the performance and quality of the plug valve. In the future, the plug valve will continue to innovate and upgrade technology, adopt more advanced materials and manufacturing processes, and improve its corrosion resistance, wear resistance and sealing performance. At the same time, intelligent control technology will be introduced to realize remote monitoring and automatic operation of the plug valve, further improving the safety and efficiency of drilling operations.

[0075] Referring to Figures 5-7 In some examples, the valve core of the plug valve is a spherical valve core 421, and the spherical valve core 421 is provided with a connection end 422 near one side of the outer peripheral surface of the plug valve. The connection end 422 can be connected to the adjusting tool.

[0076] By setting the spherical valve core 421 and the connection end 422, when the opening and closing state of the plug valve needs to be adjusted, the adjusting tool can be used in cooperation with the connection end 422 to more conveniently and accurately control the action of the valve core. This design further improves the operation convenience and reliability of the plug valve, especially suitable for the strict requirements of drilling equipment on fluid control under complex working conditions, which helps to improve the overall efficiency and safety of drilling operations.

[0077] In some examples, the plug valve as a whole is a cone, and the cross-sectional size of the second connecting part 430 is smaller than that of the first connecting part 410.

[0078] This conical design makes the plug valve better fit with the matching equipment during installation, reduces the gap during installation, and reduces the risk of fluid leakage. At the same time, the feature that the cross-sectional size of the second connecting part 430 is smaller than that of the first connecting part 410 not only helps to reduce the overall weight of the plug valve, making it easier to carry and install, but also saves material costs to some extent. Moreover, this structure can form a certain pressure difference when the fluid passes through, which helps to more stably control the flow of fluid, further improving the reliability and stability of the drilling equipment during operation.

[0079] In some examples, at least one of the internal thread 411 and the external thread 431 is a threaded structure with a taper.

[0080] The threaded structure with taper can make the connection between the first connecting part 410 of the plug valve and the drill pipe, and the second connecting part 430 and the communication hole 220 more closely and stably. During installation, as the thread is screwed in, the taper design will make the connection gradually fit, effectively reducing the gap at the connection, thereby greatly reducing the possibility of fluid leakage and further improving the safety and sealing of the drilling operation.

[0081] At the same time, this tapered threaded structure also has a certain self-locking function, which can better maintain the stability of the connection and is not prone to loosening when subjected to vibration or external force, ensuring that the plug valve always maintains a reliable working state in a complex downhole environment. Moreover, the threaded structure with taper is relatively convenient to disassemble, and will not cause difficult disassembly due to excessive tightening, providing convenience for equipment maintenance and replacement.

[0082] Referring to Figures 5-7 In some examples, sealing rings are provided at the connection positions of the first connecting part 410 and the second connecting part 430.

[0083] Providing sealing rings at the connection positions of the first connecting part 410 and the second connecting part 430 can further enhance the sealing performance between the plug valve and the drill pipe and the communication hole 220. These sealing rings are usually made of materials that are resistant to high temperature, corrosion and have good elasticity, and can maintain stable sealing effect for a long time in harsh downhole environment.

[0084] When the plug valve is installed in place, the sealing ring will be compressed at the connection position, forming a reliable sealing barrier to effectively prevent the fluid in the wellbore from leaking out through the small gap at the connection. This not only ensures the safe progress of the drilling operation and avoids accidents that may be caused by fluid leakage, but also reduces environmental pollution and meets environmental protection requirements. At the same time, the provision of sealing rings also prolongs the service life of the plug valve and related equipment, reduces equipment damage and maintenance costs caused by leakage, and improves the economy and reliability of the entire drilling system. Moreover, when the plug valve needs to be disassembled and replaced, the sealing ring will not cause too much obstruction to the disassembly process, making it convenient for operators to operate.

[0085] In some examples, a one-way valve is provided at a position close to the communication hole 220 of the flow guide main body 200, and the drill pipe can push open the one-way valve and disable the one-way valve;

[0086] In the case of overflow in the wellbore, the one-way valve can block the oil or gas flowing towards the communication hole 220, and force the overflowed oil or gas to be discharged and diverted through the pipeline branch 300.

[0087] The setting mode of the one-way valve not only ensures that the drilling tool can smoothly open the one-way valve for operation in the normal drilling process, but also quickly and automatically closes when overflow and other abnormal conditions occur in the wellbore, effectively preventing further leakage of oil or gas. The plugging effect is reliable, can withstand a certain pressure, and ensures that additional safety can be provided for drilling operations in emergency situations. Moreover, by discharging and shunting the overflow oil or gas through the pipeline branch 300, damage to equipment caused by excessive pressure is avoided, further improving the safety and stability of drilling operations.

[0088] The design of the one-way valve also fully considers the convenience and economy in actual operation. Since the one-way valve can automatically fail when the drilling tool is opened, there is no need for additional steps to close or open it, which greatly simplifies the operation process and improves efficiency. At the same time, the material of the one-way valve is usually selected from high-quality materials that are resistant to wear and corrosion to ensure that it can operate stably for a long time in harsh downhole environments, reducing costs and time consumption due to frequent replacement. In addition, the connection method of the one-way valve and the flow guide main body 200 is also carefully designed, usually using a detachable connection structure to facilitate maintenance or replacement when needed, further reducing maintenance costs. In actual application, this simple blowout preventer with a one-way valve has shown its excellent performance and reliability. It not only quickly responds to wellbore overflow and ensures safety, but also improves the overall efficiency and economy of drilling operations through its efficient design and convenient operation method.

[0089] In some examples, a pull ring structure 320 is provided on the pipeline branch 300.

[0090] The presence of the pull ring structure 320 described above allows the operator to effectively lift and flexibly transfer the entire device in an extremely convenient manner by using hooks or other binding tools. When the number of pipeline branches 300 is set to two or more, this design not only significantly improves the stability of lifting, but also ensures that the entire device maintains a more balanced state during lifting, thereby greatly reducing the risk of device damage due to uneven stress, further improving the safety and efficiency of operation.

[0091] The pull ring structure 320 is provided on the pipeline branch 300, providing a more convenient operation mode for the operating personnel. When it is necessary to operate the pipeline branch 300, such as opening or closing a valve, checking the pipeline state, etc., the operating personnel can quickly and accurately find the operation position through the pull ring structure 320 without blind groping in the complex pipeline system. The design of the pull ring structure 320 usually considers the principle of ergonomics, ensuring that the operating personnel can maintain a comfortable posture during operation and reduce fatigue. At the same time, the material of the pull ring structure 320 is also carefully selected, usually made of high-strength, corrosion-resistant materials, to ensure that it can be used stably for a long time in harsh downhole environments and will not affect the operation effect due to corrosion or wear. In addition, the setting of the pull ring structure 320 also facilitates the identification and management of the pipeline branch 300, and the operating personnel can quickly identify different pipeline branches 300 through the marks or colors on the pull ring, thereby improving the operation efficiency and accuracy.

[0092] Referring to Figures 5-7 In some examples, the side of the pipeline branch 300 away from the flow guide body 200 is connected to the overflow reservoir 500 through a pipeline.

[0093] By connecting the side of the pipeline branch 300 away from the flow guide body 200 to the overflow reservoir 500, effective collection and treatment of the overflow oil or gas is achieved. When overflow occurs in the wellbore, the overflow oil or gas is smoothly guided into the overflow reservoir 500 after passing through the flow guide body 200 and the pipeline branch 300. The overflow reservoir 500 usually has a large capacity and good sealing performance, which can safely store these overflow substances and prevent them from directly leaking into the surrounding environment to cause pollution.

[0094] At the same time, the overflow reservoir 500 can also be equipped with corresponding treatment equipment, such as an oil-water separator and a gas purification device, to further treat and purify the collected overflow substances, so that they meet the environmental emission standards before being discharged or recycled. This design not only solves the problem of overflow substance discharge, but also realizes effective resource recycling and reuse, reduces the impact on the environment, and meets the requirements of sustainable development. Moreover, connecting the pipeline branch 300 to the overflow reservoir 500 also facilitates the centralized management and monitoring of overflow substances, and the operating personnel can regularly check the liquid level and water quality of the overflow reservoir 500 to timely grasp the treatment progress and effect of the overflow substances, providing strong protection for the safety and environmental protection of drilling operations.

[0095] Referring to Figures 5-7 In some examples, an oil-gas separation device is provided in the overflow reservoir 500, and the overflow reservoir 500 has multiple sub-chambers to store oil or gas respectively.

[0096] The oil-gas separation device arranged in the overflow reservoir 500 can efficiently separate the collected overflow materials. In drilling operations, the overflow materials often contain a mixture of oil and gas. If not separated, directly stored or treated, not only a large amount of storage space will be occupied, but also the subsequent treatment effect and resource recovery efficiency may be affected. The oil-gas separation device can effectively separate oil and gas through specific separation principles and technologies, so that they are stored in different sub-cavities of the overflow reservoir 500.

[0097] This separate storage method has many advantages. On the one hand, targeted processing and recovery measures can be taken according to the different properties of oil and gas. For example, the separated oil can be further purified and reused as fuel or other industrial raw materials; the separated gas can be discharged after purification or used in other production processes. On the other hand, separate storage can also avoid mutual influence or reaction of oil and gas during storage, thereby ensuring the safety and stability of storage.

[0098] In addition, the multiple sub-cavities of the overflow reservoir 500 also facilitate accurate measurement and management of the storage amount of oil and gas. The operating personnel can use monitoring devices such as liquid level meters and flow meters arranged on the sub-cavities to monitor the storage of oil and gas in real time, and timely adjust the processing and recovery strategy to ensure the smooth progress of drilling operations and the effective use of resources. At the same time, this design also improves the flexibility and adaptability of the overflow reservoir 500, which can reasonably allocate and use the sub-cavities according to different overflow conditions and processing needs.

[0099] In some examples, a flow meter and / or a pressure sensor are arranged in each pipe branch 300; or the valve structure 310 includes at least one of an electromagnetic valve, a check valve, an overflow valve, a stop valve, a gate valve, a butterfly valve, and a regulating valve.

[0100] By arranging a flow meter and / or a pressure sensor in each pipe branch 300, the fluid flow and pressure in the pipe can be monitored in real time, thereby providing accurate data support for the operating personnel to timely adjust the operating parameters of the drilling equipment, and ensuring the safe and efficient progress of the drilling operation. The valve structure 310 uses at least one of an electromagnetic valve, a check valve, an overflow valve, a stop valve, a gate valve, a butterfly valve, and a regulating valve, which can flexibly select the appropriate valve type according to different working conditions and needs, to achieve accurate control and adjustment of the fluid in the pipe, and further improve the performance and reliability of the drilling equipment.

[0101] Flow meters are devices used to measure the rate of fluid flow in a pipeline, common types include differential pressure flow meters, vortex flow meters, ultrasonic flow meters, electromagnetic flow meters; pressure sensors can convert fluid pressure into electrical signals to monitor changes in pressure within the pipeline, common types include piezoresistive pressure sensors, capacitive pressure sensors, piezoelectric pressure sensors.

[0102] Valve structures 310 are key devices for controlling the direction, flow rate, and pressure of fluid flow, common types and their functions include electromagnetic valves that use electromagnetic force to control valve opening and closing, check valves that allow fluid to flow only in one direction, relief valves that automatically open to relieve pressure when the pressure exceeds a set value, stop valves that control fluid flow by moving the valve along the valve seat axis, gate valves that completely open or close fluid flow by moving the gate up and down, butterfly valves that use rotating discs to control fluid flow, and regulating valves that are used to accurately regulate fluid flow or pressure; pipeline branches 300 refer to branch pipelines that branch off from the main pipeline, used to distribute fluid to different areas or equipment.

[0103] The present application provides a drilling equipment, comprising the above-mentioned simple blowout preventer of drilling equipment.

[0104] The drilling equipment of the present application has the advantages of reasonable structure and reliable performance. During normal drilling, the plug valve, check valve, and other components in the simple blowout preventer work cooperatively and do not hinder the normal operation of the drilling tool, ensuring efficient and continuous drilling. When overflow or other abnormal conditions occur in the wellbore, the simple blowout preventer can quickly take effect, the plug valve is securely installed to effectively prevent wellbore overflow, the check valve automatically closes to block oil or gas and guide it to be discharged through the pipeline branch 300, while the flow meter and pressure sensor provide real-time feedback data, and the valve structure 310 precisely adjusts the fluid, ensuring the safety of drilling operations. In addition, the overflow reservoir 500 and the oil and gas separation device inside it are designed to properly collect, separate, and process overflow materials, avoiding environmental pollution and achieving effective resource recycling and reuse. This drilling equipment, by integrating a simple blowout preventer, greatly improves the safety, stability, and economy of drilling operations, providing more reliable equipment support for oil and gas exploration and other drilling work.

[0105] The same or similar reference numerals in the drawings of the present application correspond to the same or similar components; in the description of the present application, it is understood that if the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right" and the like is based on the orientation or positional relationship shown in the drawings, it is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationship in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the present application, for those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0106] The above is only a preferred example of the present application and does not limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A simple blowout preventer for a drilling rig, characterized in that The simplified blowout preventer is detachably connected to the wellbore and includes: A connecting body is installed in the middle area or opening of the well casing, and the periphery of the connecting body is sealed to the well casing; A flow guiding body is connected to or integrally formed with the connecting body. The flow guiding body has a flow guiding cavity communicating with the wellbore. A communication hole is provided on the side of the flow guiding body away from the connecting body. At least one pipe branch is provided on the periphery of the flow guiding body and communicates with the flow guiding cavity, and each pipe branch is provided with a valve structure; An annular plug is detachably connected to the communicating hole, and the annular plug can be installed and removed from the communicating hole by means of a drill bit; In the event of overflow in the wellbore, the annular plug is installed on the drill string and sealed to the connecting hole by the drill string. The overflowing oil or gas is depressurized and diverted through the pipeline branch. The annular plug is a plug valve, which includes a first connecting part, a valve body and a second connecting part connected in sequence. The first connecting part, the valve body and the second connecting part are connected, and the valve body has an openable and closable valve core. The first connecting part has an internal thread and is detachably connected to the drill rod of the drill bit; the second connecting part has an external thread and is detachably connected to the communicating hole.

2. The simple blowout preventer of a well drilling apparatus according to claim 1, characterized in that, The valve core of the plug valve is a spherical valve core, and a connecting end is provided on the side of the spherical valve core near the outer peripheral surface of the plug valve. The connecting end can be connected to an adjustment tool.

3. The simple blowout preventer of a well drilling apparatus as claimed in claim 1, wherein, The plug valve is cone-shaped as a whole, and the cross-sectional dimension of the second connection part is smaller than that of the first connection part.

4. The simple blowout preventer of a well drilling apparatus as claimed in claim 1, wherein, At least one of the internal thread and the external thread is a tapered thread structure; Alternatively, a sealing ring may be provided at the connection positions of both the first connecting part and the second connecting part.

5. A simple blowout preventer for a well drilling apparatus according to any one of claims 1 to 4, characterized in that, A one-way valve is provided near the connecting hole of the flow guide body, and the drill bit can open the one-way valve and disable it. In the event of overflow in the wellbore, the one-way valve can block the oil or gas flowing toward the connecting hole and force the overflowing oil or gas to be depressurized and diverted through the pipeline branch.

6. A simple blowout preventer for a drilling rig as claimed in any one of claims 1 to 4, characterized in that A pull ring structure is installed on the branch of the pipeline.

7. A simple blowout preventer for a drilling rig as claimed in any one of claims 1 to 4, characterized in that The branch pipeline on the side away from the main flow guide is connected to the overflow storage tank via a pipeline; Alternatively, the overflow reservoir may be equipped with an oil-gas separation device, and the overflow reservoir may have multiple sub-cavities for storing oil or gas respectively.

8. A simple blowout preventer for a well drilling apparatus as claimed in any one of claims 1 to 4, characterized in that, Each of the aforementioned pipeline branches is equipped with a flow meter and / or a pressure sensor; or, the valve structure includes at least one of a solenoid valve, a check valve, a relief valve, a gate valve, a butterfly valve, and a regulating valve.

9. A drilling apparatus, characterized by Includes a simple blowout preventer for drilling equipment as described in any one of claims 1 to 8.

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