Intelligent safety control device and method for drilling system

Abstract

The present application discloses an intelligent safety control device and method for a drilling system, which relates to the field of control; the device includes a signal acquisition unit, a processing unit, and an alarm unit; the signal acquisition unit includes an encoder, a hydraulic sensor, and a position switch; the encoder acquires the mechanical displacement parameters of the drawworks drum shaft; the hydraulic sensor acquires the pressure parameters of the hydraulic oil pipeline, and the position switch detects the position of the plugging assembly; the processing unit is used to determine the locking state of the blowout preventer based on analog signals and digital signals, and to perform an anti-lifting operation when the blowout preventer is locked. The intelligent safety control device and method for a drilling system provided in the embodiment of the present application can improve the alarm and braking accuracy during the traveling block control process by knowing the traveling block height and using two signals to know the closing state of the blowout preventer, effectively avoid collision accidents, and ensure equipment safety, thereby improving the accuracy, reliability, and safety of the traveling block control system.

Description

Technical Field

[0001] The present application relates to the field of control technology, and in particular to an intelligent safety control device and method for a drilling system. Background Art

[0002] In oil drilling operations, controlling the movement of the traveling block is a key step in ensuring its safe operation. In the prior art, the height of the hook can be calculated based on the rotation parameters of the drawworks encoder, thereby enabling monitoring of the height of the traveling block. However, this method can only provide height data of the traveling block, thereby reminding the operator to perform braking operations when the traveling block approaches the overhead crane. The function is relatively simple, and manual operation has a large lag, resulting in low accuracy and reliability of the traveling block braking, affecting the safe operation of the drilling system.

[0003] Therefore, how to overcome the above-mentioned technical problems and defects becomes a key issue that needs to be solved. Summary of the Invention

[0004] In order to solve the above technical problems, the present application provides an intelligent safety control of a drilling system. Since the height of the traveling block is obtained through an encoder and the corresponding braking strategy is executed in a timely manner, and the closed state of the blowout preventer is obtained through two signals and an anti-lifting operation is performed, the warning and braking accuracy during the traveling block control process can be improved, effectively avoiding collision accidents and ensuring equipment safety, thereby improving the accuracy, reliability and safety of the traveling block control system.

[0005] According to one aspect of the present application, an intelligent safety control device for a drilling system is provided, wherein the drilling system includes a drawworks, a drawworks brake mechanism, a crown block, a traveling block, and a blowout preventer, wherein the blowout preventer includes a plugging assembly; the device includes a signal acquisition unit, an alarm unit, and a processing unit; wherein,

[0006] The signal acquisition unit includes an encoder, a hydraulic sensor, and a position switch; the encoder is arranged on the drum shaft of the winch and is used to collect the mechanical displacement parameters of the drum shaft of the winch; the hydraulic sensor is arranged in the hydraulic oil pipeline of the blowout preventer plugging assembly and is used to collect the pressure parameters of the hydraulic oil pipeline and generate an analog signal; the position switch is arranged at the blowout preventer plugging assembly and is used to detect the position of the plugging assembly and generate a digital signal;

[0007] The first signal input end of the processing unit is connected to the signal output end of the encoder, and the control end of the processing unit is connected to the controlled end of the warning unit; the processing unit is used to determine the height information of the traveling block based on the mechanical displacement parameter; and, based on the height information, determine whether the traveling block has reached a preset position, and perform a corresponding braking operation when reaching the preset position; there are multiple preset positions, and the braking operations for different preset positions are different; and, based on the analog signal and the digital signal, determine the locking state of the blowout preventer, and perform an anti-lifting operation when the blowout preventer is locked.

[0008] In the above solution, the preset positions include the second-floor platform position, the warning position, and the upper brake position; the processing unit is used to:

[0009] When the traveling block reaches the second-floor platform position, controlling the warning unit to perform a first warning operation;

[0010] When the warning position is reached, controlling the warning unit to perform a second warning operation;

[0011] When the upper brake position is reached, a first control signal is generated and sent to the winch brake mechanism to control the winch brake mechanism to perform a braking operation.

[0012] In the above solution, the signal acquisition unit further includes a torque sensor and a load pressure sensor;

[0013] The torque sensor and the load pressure sensor are arranged on the hook of the traveling block, and the signal output ends of the torque sensor and the load pressure sensor are connected to the second signal input end of the processing unit; the torque sensor is used to collect the torque parameter of the traveling block hook, and the load pressure sensor is used to collect the load parameter of the traveling block hook;

[0014] The processing unit is further used to determine the moving direction of the traveling block based on the mechanical displacement parameter; based on the moving direction, the torque parameter and the load parameter, determine whether the moving state of the traveling block is normal; and when the moving state is abnormal, generate a first control signal and send it to the winch brake mechanism.

[0015] In the above solution, the blowout preventer is a double-gate blowout preventer; the plugging assembly includes an upper gate and a lower gate, the upper gate is a full-seal assembly for fully sealing the wellhead, and the lower gate is a semi-seal assembly for annularly sealing the wellhead;

[0016] The processing unit is configured to:

[0017] Based on the analog signal, determining whether the hydraulic parameter exceeds a preset hydraulic threshold, and determining that the blowout preventer is locked when the hydraulic parameter exceeds the preset hydraulic threshold;

[0018] or,

[0019] Based on the digital signal, it is determined whether the upper gate or the lower gate is closed, and when either gate is closed, it is determined that the blowout preventer is locked.

[0020] According to one aspect of the present application, a method for intelligent safety control of a drilling system is provided, the method comprising:

[0021] collecting mechanical displacement parameters of the winch drum shaft, and determining height information of the traveling block based on the mechanical displacement parameters;

[0022] Based on the height information, determining whether the traveling block has reached a preset position, and performing a corresponding braking operation when reaching the preset position; there are multiple preset positions, and the braking operations for different preset positions are different;

[0023] Based on the analog signal and the digital signal, the locking state of the blowout preventer is determined, and when the blowout preventer is locked, an anti-lift-off operation is performed; the analog signal is generated by collecting pressure parameters of the hydraulic oil pipeline of the blowout preventer plugging assembly, and the digital signal is generated by detecting the in-place state of the plugging assembly.

[0024] In the above solution, the preset positions include the second-floor platform position, the warning position, and the upper brake position; and performing the corresponding braking operation upon reaching the preset positions includes:

[0025] When the traveling block reaches the second-floor platform position, controlling the warning unit to perform a first warning operation;

[0026] When the warning position is reached, controlling the warning unit to perform a second warning operation;

[0027] When the upper brake position is reached, a first control signal is generated and sent to the winch brake mechanism;

[0028] In response to the first control signal, the winch brake mechanism performs a braking operation.

[0029] In the above solution, the preset position further includes upper and lower anti-smashing positions, and the lower anti-smashing position is arranged below the braking position; and the corresponding braking operation is performed when the preset position is reached, further comprising:

[0030] When the preset lower anti-smashing position is reached, a first control signal is generated and sent to the winch brake mechanism.

[0031] In the above solution, the method further includes:

[0032] Collect torque parameters and load parameters of the traveling block hook;

[0033] determining a moving direction of the traveling block based on the mechanical displacement parameter;

[0034] determining whether the moving state of the traveling block is normal based on the moving direction, the torque parameter, and the load parameter;

[0035] In the case of an abnormal moving state, a first control signal is generated and sent to the winch brake mechanism.

[0036] In the above solution, judging the locking state of the blowout preventer based on the analog signal and the digital signal includes:

[0037] Based on the analog signal, determining whether the hydraulic parameter exceeds a preset threshold, and determining that the blowout preventer is locked if the preset threshold is exceeded;

[0038] or,

[0039] Based on the digital signal, it is determined whether the upper gate and the lower gate are closed, and when any gate is closed, it is determined that the blowout preventer is locked.

[0040] In the above solution, the method further includes:

[0041] Based on the height information, it is determined whether the traveling block has reached a preset lower anti-smashing position, and when the preset lower anti-smashing position is reached, a first control signal is generated and sent to the winch brake mechanism.

[0042] In the above solution, the method further includes:

[0043] Based on the height information, determining whether the traveling block has reached a preset upper limit position;

[0044] When the upper limit position is reached and the stay time exceeds n seconds, it is determined that the traveling block is in the state of replacing drilling tools; n≥12;

[0045] Determine whether the number of times the traveling block is in the drilling tool replacement state in the current counting cycle reaches N times, where N is greater than or equal to 3;

[0046] When the number reaches N, a second control signal is generated and sent to the grouting control box; the second control signal is used to instruct the grouting control box to perform an automatic grouting operation.

[0047] The intelligent safety control device and method for the drilling system provided in the present application detects the locked state of the blowout preventer by collecting four signals, namely two hydraulic signals and two switch signals, thereby realizing accurate and reliable monitoring of the locked state of the blowout preventer, so that the anti-lifting operation can be performed accurately and timely, thereby increasing the safety and reliability of the drilling system; further, by using an encoder to obtain the change in the moving position of the traveling block, and performing a layered early warning mechanism when the traveling block reaches multiple early warning positions, until the braking operation is performed after reaching the limit position, not only the anti-collision response is hierarchical, but also automatic response and automatic control are realized, effectively improving the operation lag and inaccurate braking position problems caused by manual operation, improving the accuracy and reliability of the overhead crane control, and ensuring the safe operation of the drilling system.

[0048] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application, and do not constitute an improper limitation on the present application.

[0050] Figure 1 A schematic structural diagram of an intelligent safety control device for a drilling system provided in an embodiment of the present application;

[0051] Figure 2 A flow chart of an intelligent safety control method for a drilling system provided in an embodiment of the present application;

[0052] Figure 3 A structural diagram of an intelligent control system for drilling safety provided as an application example of this application;

[0053] Figure 4 Schematic diagram of the wireless output circuit structure in the drilling safety intelligent control system provided for the application example of this application;

[0054] Figure 5 A schematic diagram of the circuit board structure of the main control chip in the drilling safety intelligent control system provided for the application example of this application;

[0055] Figure 6 Schematic diagram of the housing structure of the drilling safety intelligent control system provided for the application example of this application;

[0056] Figure 7 A top view of the housing of the drilling safety intelligent control system provided for the application example of this application;

[0057] Figure 8Schematic diagram of the power interface circuit structure in the drilling safety intelligent control system provided for the application example of this application;

[0058] Figure 9 Schematic diagram of the encoder interface circuit structure in the drilling safety intelligent control system provided for the application example of this application;

[0059] Figure 10 Schematic diagram of the display screen interface circuit structure in the drilling safety intelligent control system provided for the application example of this application;

[0060] Figure 11 Schematic diagram of the analog channel protection circuit structure in the drilling safety intelligent control system provided for the application example of this application;

[0061] Figure 12 Schematic diagram of the analog conversion circuit structure in the drilling safety intelligent control system provided for the application example of this application;

[0062] Figure 13 Schematic diagram of the digital input circuit structure in the drilling safety intelligent control system provided for the application example of this application;

[0063] Figure 14 Schematic diagram of the digital output circuit structure in the drilling safety intelligent control system provided for the application example of this application. DETAILED DESCRIPTION

[0064] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0065] An embodiment of the present application provides an intelligent safety control device for a drilling system, wherein the drilling system includes a drawworks, a drawworks brake mechanism, a crown block, a traveling block, and a blowout preventer, wherein the blowout preventer includes a plugging assembly.

[0066] The drilling system is a key equipment used to construct wellbores in oil, natural gas and geological exploration. Its working principle involves the coordinated work of multiple key components. During drilling operations, the drawworks serves as the power core, and the wire rope on the drum is used to lift and lower the drill string. The motor or diesel engine drives the drum to rotate, and the wire rope amplifies the power through the pulley system composed of the crown block and the traveling pulley to reduce the drawworks load, while the drawworks brake mechanism is used to control the drill string lowering speed and trigger hydraulic locking when braking operation is required to achieve traveling block braking. The crown block is fixed to the pulley group at the top of the derrick, usually with 8-12 pulleys, which bears all the dynamic loads of the traveling system. The traveling pulley is suspended under the crown block and connected to the winch drum by a wire rope to form a movable pulley group, which reduces the drawworks pulling force requirement. The blowout preventer is the core well control equipment used to seal the wellhead annulus to prevent blowouts and uncontrolled fluid spraying.

[0067] like Figure 1 As shown, the device may include a signal acquisition unit 101, an alarm unit 102 and a processing unit 103; the signal acquisition unit 101, the alarm unit 102 and the processing unit 103 are described in detail below in conjunction with specific embodiments.

[0068] The signal acquisition unit 101 includes an encoder, a hydraulic sensor, and a position switch; the encoder is arranged on the drum shaft of the drawworks; the encoder is used to collect the mechanical displacement parameters of the drawworks drum shaft; the hydraulic sensor is arranged in the hydraulic oil pipeline of the blowout preventer plugging assembly, and is used to collect the pressure parameters of the hydraulic oil pipeline and generate an analog signal; the position switch is arranged at the blowout preventer plugging assembly, and is used to detect the in-place status of the plugging assembly and generate a digital signal.

[0069] The first signal input end of the processing unit 103 is connected to the signal output end of the encoder, and the control end of the processing unit 103 is connected to the controlled end of the warning unit 102; the processing unit 103 is used to determine the height information of the traveling block based on the mechanical displacement parameter; and, based on the height information, to determine whether the traveling block has reached a preset position, and to perform a corresponding braking operation when reaching the preset position; there are multiple preset positions, and the braking operations for different preset positions are different; and, based on the analog signal and the digital signal, to determine the locking state of the blowout preventer, and to perform an anti-lifting operation when the blowout preventer is locked.

[0070] In practical applications, the traveling block can also be called a traveling block.

[0071] In actual application, the preset positions include the second-floor platform position, the warning position, and the upper brake position; the processing unit 103 can be specifically used to:

[0072] When the traveling block reaches the second-floor platform position, the warning unit 102 is controlled to perform a first warning operation;

[0073] When the vehicle reaches the warning position, the warning unit 102 is controlled to perform a second warning operation;

[0074] When the upper brake position is reached, a first control signal is generated and sent to the winch brake mechanism to control the winch brake mechanism to perform a braking operation.

[0075] In actual application, the first control signal is used to control the winch brake mechanism to perform a braking operation.

[0076] Here, the first warning operation may be to emit a 3-second warning tone; the warning position may be configured to be 2 meters before the upper braking position, and the second warning operation may be to continuously emit a sound warning.

[0077] In one embodiment, the preset position further includes upper and lower anti-smashing positions, and the lower anti-smashing position is set below the brake position; the processing unit 103 can also be used to perform an anti-smashing operation; specifically, the processing unit 103 can also be used to:

[0078] When the preset lower anti-smashing position is reached, a first control signal is generated and sent to the winch brake mechanism.

[0079] In actual application, the lower anti-smashing position can be configured to be 0.5 meters away from the upper brake position. When the lower anti-smashing position is reached, the brakes will be applied to prevent the traveling carriage from smashing down onto the platform.

[0080] Here, by using encoder signals to determine the height and performing multi-layer early warning control, the position of the oil drilling rig's traveling block can be accurately monitored. When the traveling block approaches the overhead crane, an alarm is automatically issued and the warning levels of different positions are distinguished, and finally braking is implemented. Since graded warnings are given according to different positions, the current state of the traveling block can be effectively distinguished, thereby effectively avoiding collision accidents and ensuring equipment safety. At the same time, braking-related strategies can be formulated in advance to improve system work efficiency.

[0081] In one embodiment, the signal acquisition unit further includes a torque sensor and a load pressure sensor;

[0082] The torque sensor and the load pressure sensor are arranged on the hook of the traveling block, and the signal output ends of the torque sensor and the load pressure sensor are connected to the second signal input end of the processing unit 103; the torque sensor is used to collect the torque parameter of the traveling block hook, and the load pressure sensor is used to collect the load parameter of the traveling block hook;

[0083] The processing unit 103 is further configured to determine the moving direction of the traveling block based on the mechanical displacement parameter; determine whether the moving state of the traveling block is normal based on the moving direction, the torque parameter, and the load parameter; and generate a first control signal and send it to the winch brake mechanism if the moving state is abnormal.

[0084] Here, the normal torque range of different load parameters in different moving directions can be preset in advance to determine whether the current torque parameter exceeds the corresponding torque range, and if so, determine that the current moving state is abnormal; at the same time, by accurately and in real time obtaining the real-time height of the traveling block, the load of the hook, the torque, etc., it is convenient for the operator to optimize the drilling tool lifting control, and can realize data recording and storage, providing a basis for subsequent analysis and operation optimization.

[0085] In actual application, the blowout preventer in the drilling system is set at the wellhead and is used to seal the well.

[0086] In one embodiment, the blowout preventer may be a double-gate blowout preventer; the plugging assembly includes an upper gate and a lower gate; the upper gate is a full-seal assembly for completely sealing the wellhead, and the lower gate is a semi-seal assembly for annularly sealing the wellhead; hydraulic sensors are provided on the hydraulic oil pipelines of the upper and lower gates of the blowout preventer; the signal output end of the hydraulic sensor is connected to the third signal input end of the processing unit 103 and is used to collect hydraulic parameters of the hydraulic oil pipeline;

[0087] When the processing unit 103 determines the locking state of the blowout preventer based on the analog signal and the digital signal, it is specifically configured to:

[0088] Based on the analog signal, determining whether the hydraulic parameter exceeds a preset hydraulic threshold, and determining that the blowout preventer is locked when the hydraulic parameter exceeds the preset hydraulic threshold;

[0089] or,

[0090] Based on the digital signal, it is determined whether the upper gate or the lower gate is closed, and when either gate is closed, it is determined that the blowout preventer is locked.

[0091] In actual application, the upper gate (fully closed gate) and the lower gate (half-closed gate) are usually installed on the wellhead spool; the spool is a key component connecting the drilling platform and downhole equipment, and the gate blowout preventer is installed on the spool to control the pressure and fluid at the wellhead.

[0092] During drilling operations, the upper ram (full-seal ram) can be used to fully seal the wellhead. Specifically, when there are no drilling tools or other equipment in the well, the upper ram can completely seal the wellhead to prevent blowouts, oil and gas leaks, or other unexpected situations. In an emergency, such as an abnormal increase in downhole pressure, the upper ram can be quickly closed to ensure the safety of personnel and equipment.

[0093] The lower gate (semi-closed gate) can be used for annular sealing to control well pressure. Specifically, when there are oil pipes, drilling tools or other equipment in the well, the lower gate can seal the annular space around these equipment, thereby controlling the well pressure and preventing oil and gas leakage. Since the sizes of downhole equipment may vary, the lower gate is usually designed with greater adaptability and can fit closely to equipment of different sizes to ensure effective sealing.

[0094] In actual application, the lower gate can be a device that can seal the drill pipe and the wellhead annulus. When the lower gate is closed, the rubber seal holds the outer wall of the drill pipe tightly to prevent the formation fluid from rising through the wellhead annulus, but the drilling fluid can still flow inside the drill pipe; the lower gate can also be called the lower half-sealing gate, or the lower half-sealing assembly.

[0095] In actual application, under some preset circumstances, the lower gate can also bear part of the weight of suspended drilling tools and other operating tools, providing stable support for underground operations.

[0096] In actual application, the upper gate can be a gate that can completely close the wellhead. When the upper gate is closed, the entire wellbore is completely isolated from the outside world to prevent fluid from spraying out. The upper gate can also be called an upper fully sealed gate, or an upper fully sealed assembly.

[0097] Here, by installing the upper and lower gate plates on the wellhead spool, they respectively play the role of fully sealing the wellhead and controlling the well pressure through annular seals. Since the design and installation of the double gate plates fully consider the complexity and safety requirements of downhole operations, by detecting the closing status of any gate plate with two signals, the reliability and accuracy of the gate plate status detection can be improved, thereby ensuring the safe and stable operation of the entire drilling system.

[0098] In actual application, the preset hydraulic threshold can be configured as 11Mpa; based on two analog signals (upper gate and lower gate hydraulic oil pipelines), it is judged whether the hydraulic parameters in the upper gate and lower gate hydraulic oil pipelines of the sealing mechanism exceed 11Mpa, and when the hydraulic parameters of any hydraulic oil pipeline exceed 11Mpa, the anti-lifting and breaking operation is performed.

[0099] Here, by performing anti-lifting operations in a timely manner when monitoring the gate closing, not only can the drilling tools be prevented from being damaged, but the safety of the construction workers can also be guaranteed.

[0100] In practical applications, the device may include a switch signal acquisition module; the switch signal acquisition module is connected to the status signal output terminals of the hydraulic sensor and the position switch to obtain the status of the hydraulic sensor and the position switch; the switch signal acquisition module generates status information based on the collected status signal and sends it to the fourth signal input terminal of the processing unit 103;

[0101] The processing unit 103 is further configured to determine whether the upper gate and the lower gate are in a closed state based on the state information, and when either gate is in a closed state, determine that the blowout preventer is locked, and send a first control signal to the winch brake mechanism.

[0102] In actual application, when the switch signal acquisition module determines whether the hydraulic parameters in the hydraulic oil pipeline exceed the preset parameters based on the status signal of the hydraulic sensor, for example, whether it exceeds 11Mpa, when it exceeds the preset parameters, it generates status information representing that the corresponding gate is closed and sends it to the processing unit 103; accordingly, it can also determine whether the gate has reached the preset position based on the change of the switch signal of the in-place switch, and when it reaches the preset position, it generates status information representing that the corresponding gate is closed and sends it to the processing unit 103.

[0103] In actual application, you can choose to install either the hydraulic sensor or the position switch according to the actual construction conditions. For example, when the conditions for installing the hydraulic sensor are not available, the gate closing state can be detected by installing the position switch. For another example, when the conditions for installing the position switch are not available, the gate closing state can be detected by installing the hydraulic sensor. Of course, when the conditions for installing both are available, the hydraulic sensor and the position switch can be installed at the same time.

[0104] Here, the embodiment of the present application can collect four analog signals, namely the upper gate hydraulic signal, the lower half sealing hydraulic signal, the large hook pressure load signal and the large hook torque signal. Among them, the digital signals collected by the 2-way hydraulic analog signal and the 2-way switch signal acquisition module total two types of four signals. It is possible to judge the closing state of the blocking component through any one of the signals, thereby realizing the precise execution of the anti-lifting and breaking function and improving the accuracy and reliability of the braking control.

[0105] In the prior art, the drilling system performs grouting on the well by manual control or control of a grouting control box; the height information of the traveling block can be introduced to determine whether the drilling tool has been replaced, thereby automatically sending a grouting instruction to the grouting control box to instruct the grouting control box to start grouting.

[0106] Based on this, in one embodiment, the processing unit 103 is further configured to perform an automatic grouting operation; specifically, the processing unit 103 can also be configured to:

[0107] Based on the height information, determining whether the traveling block has reached a preset upper limit position;

[0108] When the upper limit position is reached and the stay time exceeds n seconds, it is determined that the traveling block is in the state of replacing drilling tools; n≥12;

[0109] Determine whether the number of times the traveling block is in the drilling tool replacement state in the current counting cycle reaches N times, where N is greater than or equal to 3;

[0110] When the number reaches N, a second control signal is generated and sent to the grouting control box; the second control signal is used to instruct the grouting control box to perform an automatic grouting operation.

[0111] In actual application, n can be configured as 12, that is, when it stays at the upper limit position for more than 12 seconds, it is judged that the current state has entered the drill tool replacement state; N can be set to 3 times; every time the drill tool is replaced, the counter is increased by one. When the count reaches 3 times, the grouting instruction is triggered to instruct the grouting control box to perform automatic grouting operations; at the same time, the counter is reset and enters the next counting cycle; of course, on-site staff can also manually input grouting instructions, that is, execute manual control to generate instructions to start or end grouting, and realize manual remote grouting.

[0112] Here, through automatic grouting control, the supplementary drilling fluid can be automatically controlled to be injected into the wellbore through the grouting pump, so that the liquid level can rise and the static pressure of the liquid column can be restored to balance the formation pressure. By increasing the pressure of the liquid column in the well, the formation fluid can be prevented from invading the wellbore, and dangerous situations such as well kicks and blowouts can be avoided, and the downhole pressure can be kept stable. At the same time, after the grouting is started, the drilling fluid starts to circulate in the annulus again, and the cuttings are returned with the liquid flow. Therefore, the effect of cleaning the wellbore can be achieved, and the drilling fluid can smoothly carry the cuttings generated by the drill bit breaking the rock to the ground during the circulation process, ensuring the normal operation of the drill bit and thus improving the drilling efficiency.

[0113] In summary, the intelligent safety control device and method for the drilling system provided in the embodiment of the present application detects the locked state of the blowout preventer by collecting four signals, namely hydraulic signals and switch signals, to achieve accurate and reliable monitoring of the locked state of the blowout preventer, so that the anti-lifting operation can be performed accurately and timely, thereby increasing the safety and reliability of the drilling system; further, by using the encoder to obtain the change in the moving position of the traveling block, and performing a layered early warning mechanism when the traveling block reaches multiple early warning positions, until the braking operation is performed after reaching the limit position, not only the anti-collision response is hierarchical, but also automatic response and automatic control are achieved, effectively improving the operation lag and inaccurate braking position problems caused by manual operation, improving the accuracy and reliability of the traveling block control, and ensuring the safe operation of the drilling system.

[0114] The present application also provides an intelligent safety control method for a drilling system; Figure 2 As shown, the method may include:

[0115] S201: collecting mechanical displacement parameters of the winch drum shaft;

[0116] S202: Determine height information of the traveling block based on the mechanical displacement parameter;

[0117] S203: Based on the height information, determining whether the traveling block has reached a preset position;

[0118] S204: performing a corresponding braking operation upon reaching a preset position; there are multiple preset positions, and the braking operations for different preset positions are different;

[0119] S205: Determining a locking state of the BOP based on the analog signal and the digital signal; the analog signal is generated by collecting pressure parameters of a hydraulic oil pipeline of a BOP plugging assembly, and the digital signal is generated by detecting a position of the plugging assembly;

[0120] S206: When the blowout preventer is locked, an anti-lift-off operation is performed.

[0121] In one embodiment, the preset positions include a second-floor platform position, a warning position, and an upper brake position; and performing corresponding braking operations upon reaching the preset positions includes:

[0122] When the traveling block reaches the second-floor platform position, the warning unit 102 is controlled to perform a first warning operation;

[0123] When the vehicle reaches the warning position, the warning unit 102 is controlled to perform a second warning operation;

[0124] When the upper brake position is reached, a first control signal is generated and sent to the winch brake mechanism; in response to the first control signal, the winch brake mechanism performs a braking operation.

[0125] In actual application, the first control signal is used to control the winch brake mechanism to perform a braking operation.

[0126] In actual application, the first warning operation can be to emit a 3-second warning sound; the warning position can be configured to be 2 meters before the braking position, and the second warning operation can be to continuously emit a sound warning.

[0127] In actual application, the anti-smashing operation can also be performed when the traveling block descends too low.

[0128] Based on this, in one embodiment, the preset position further includes upper and lower anti-smashing positions, and the lower anti-smashing position is arranged below the brake position; and performing a corresponding braking operation when reaching the preset position further includes:

[0129] When the preset lower anti-smashing position is reached, a first control signal is generated and sent to the winch brake mechanism.

[0130] In actual application, the lower anti-smashing position can be configured to be 0.5 meters away from the upper brake position. When it reaches the lower anti-smashing position, the brakes will be applied to prevent the traveling carriage from smashing down onto the platform.

[0131] In actual application, the anti-lifting and breaking operation can also be performed when the lifting state of the traveling block is abnormal.

[0132] Based on this, in one embodiment, the method may further include:

[0133] Collect torque parameters and load parameters of the traveling block hook;

[0134] determining a moving direction of the traveling block based on the mechanical displacement parameter;

[0135] determining whether the moving state of the traveling block is normal based on the moving direction, the torque parameter, and the load parameter;

[0136] In the case of an abnormal moving state, a first control signal is generated and sent to the winch brake mechanism.

[0137] Here, the normal torque ranges for different load parameters in different moving directions can be preset in advance to determine whether the current torque parameter exceeds the corresponding torque range, and if so, determine that the current moving state is abnormal.

[0138] In one embodiment, the blowout preventer is a double-ram blowout preventer, and the plugging assembly includes an upper ram and a lower ram, the upper ram being a full-seal assembly for fully sealing the wellhead, and the lower ram being a half-seal assembly for annularly sealing the wellhead; determining the locking state of the blowout preventer based on the analog signal and the digital signal, i.e., S205, may include:

[0139] Based on the analog signal, determining whether the hydraulic parameter exceeds a preset threshold, and determining that the blowout preventer is locked if the preset threshold is exceeded;

[0140] or,

[0141] Based on the digital signal, it is determined whether the upper gate and the lower gate are closed, and when any gate is closed, it is determined that the blowout preventer is locked.

[0142] In actual application, you can choose to install either the hydraulic sensor or the position switch according to the actual construction conditions. For example, when the conditions for installing the hydraulic sensor are not available, the gate closing state can be detected by installing the position switch. For another example, when the conditions for installing the position switch are not available, the gate closing state can be detected by installing the hydraulic sensor. Of course, when the conditions for installing both are available, the hydraulic sensor and the position switch can be installed at the same time.

[0143] Here, the embodiment of the present application can collect four analog signals, namely the upper gate hydraulic signal, the lower gate hydraulic signal, the large hook pressure load signal and the large hook torque signal. Among them, through two types of four signals, namely two hydraulic analog signals and two digital signals, the closing state of the sealing component can be judged by any one of the signals, thereby improving the reliability and accuracy of the gate state detection, realizing the precise execution of the anti-lifting and breaking function, and improving the accuracy and reliability of the braking control.

[0144] In actual application, the preset hydraulic threshold can be configured as 11Mpa; when the gate working state is closed, it is determined whether the hydraulic parameters in the hydraulic oil pipeline of any of the upper gate and lower gate of the sealing mechanism exceed 11Mpa, and when any hydraulic parameter exceeds 11Mpa, an anti-lifting and breaking operation is performed.

[0145] In one embodiment, determining whether the hydraulic parameter exceeds a preset threshold based on the analog signal includes:

[0146] Based on the analog signal, it is determined whether the hydraulic parameters of the hydraulic oil pipelines of the upper gate and lower gate of the blocking mechanism exceed 11 MPa, and when the hydraulic parameter of any hydraulic oil pipeline exceeds 11 MPa, it is determined that the hydraulic parameter exceeds the preset threshold.

[0147] In the prior art, the drilling system performs grouting on the well through manual control or control of a grouting control box; the height information of the traveling pulley can be introduced to determine whether the drilling tool has been replaced, thereby automatically sending a grouting instruction to the grouting control box to instruct the grouting control box to automatically perform the grouting operation.

[0148] Based on this, in one embodiment, the method may further include:

[0149] Based on the height information, determining whether the traveling block has reached a preset upper limit position;

[0150] When the upper limit position is reached and the stay time exceeds n seconds, it is determined that the traveling block is in the state of replacing drilling tools; n≥12;

[0151] Determine whether the number of times the traveling block is in the drilling tool replacement state in the current counting cycle reaches N times, where N is greater than or equal to 3;

[0152] When the number reaches N, a second control signal is generated and sent to the grouting control box; the second control signal is used to instruct the grouting control box to perform an automatic grouting operation.

[0153] Here, by automatically monitoring the number of drill tool changes and performing automatic grouting operations, it is possible to ensure that the static liquid column pressure in the wellbore is sufficient to offset the formation pressure, thereby preventing accidents such as blowouts or well leakage, and reducing direct contact between the formation and the drilling fluid, reducing the impact of pore pressure on the well wall, thereby enhancing the stability of the well wall and improving the safety and efficiency of drilling operations.

[0154] In actual application, n can be configured as 12, that is, when it stays at the upper limit position for more than 12 seconds, it is judged that the current state has entered the drill tool replacement state; N can be set to 3 times; every time the drill tool is replaced, the counter is increased by one. When the count reaches 3 times, the grouting instruction is triggered to instruct the grouting control box to perform automatic grouting operations; at the same time, the counter is reset and enters the next counting cycle; of course, on-site staff can also manually input grouting instructions, that is, execute manual control to generate instructions to start or end grouting, and realize manual remote grouting.

[0155] In summary, the intelligent safety control method for the drilling system provided in the embodiment of the present application realizes accurate and reliable monitoring of the locked state of the blowout preventer by collecting two signals, namely the hydraulic signal and the switch signal, which can reflect the locked state of the blowout preventer, so that the anti-lifting operation can be performed accurately and timely, thereby increasing the safety and reliability of the drilling system; further, by using the encoder to obtain the change of the moving position of the traveling block, and performing a layered warning mechanism when the traveling block reaches multiple warning positions, until the braking operation is performed after reaching the limit position, not only the anti-collision response is hierarchical to avoid excessive braking interfering with the operation process, but also automatic response and automatic control are realized, effectively improving the operation lag and inaccurate braking position problems caused by manual operation, improving the accuracy and reliability of the traveling block control, and ensuring the safe operation of the drilling system.

[0156] It should be noted that the intelligent safety control device for a drilling system provided in the above embodiment is merely illustrated by the division of the aforementioned program modules when performing intelligent safety control of the drilling system. In actual applications, the aforementioned processing can be assigned to different program modules as needed, that is, the internal structure of the device can be divided into different program modules to complete all or part of the aforementioned processing. Furthermore, the intelligent safety control device for a drilling system provided in the above embodiment and the intelligent safety control method for a drilling system are based on the same concept. The specific implementation process is detailed in the method embodiment and will not be repeated here.

[0157] The embodiments of the present application are described in detail below with reference to specific application examples.

[0158] Figure 3 A drilling safety intelligent control system is shown; Figure 3 As shown, the system includes a host, a fully sealed switch (i.e., the position switch of the upper fully sealed gate), a half-sealed switch (i.e., the position switch of the lower half-sealed gate), a torque sensor, a hook load sensor, a fully sealed pressure sensor (i.e., the hydraulic sensor of the upper fully sealed gate), a half-sealed pressure sensor (i.e., the hydraulic sensor of the lower half-sealed gate), a keyboard, an LCD screen, an automatic grouting control box, a brake signal output terminal, a brake solenoid valve interface, and an acoustic alarm interface; wherein, the system uses a wireless communication module to communicate data with external devices, and the wireless communication module can be used Figure 4 The wireless module shown is model AS10-M4463D-SMA.

[0159] The host can use the main control chip model STM32F103; the circuit board structure diagram of the main control chip is as follows Figure 5 As shown, the operating frequency of the main control chip is 72MHz, and a 10-pin interface with 7 buttons is provided to connect to an external keyboard, and a winch encoder interface is configured for accessing encoder signals, an acoustic alarm interface is configured for controlling the acoustic alarm, a brake solenoid valve interface is configured for controlling the brake solenoid valve for braking operation, a brake switch output interface is configured for sending a control signal to an external control device so that the external device controls the brake solenoid valve for braking operation, 4 analog input interfaces are configured for receiving analog signals sent by the torque sensor, the hook load sensor, the fully sealed pressure sensor, and the semi-sealed pressure sensor, respectively, for receiving torque parameters, hook load parameters, fully sealed hydraulic parameters, and semi-sealed hydraulic parameters, respectively; 2 switch input interfaces are configured for receiving switch signals sent by the fully sealed switch and the semi-sealed switch, respectively, for monitoring whether the upper and lower gate plates are open or closed.

[0160] The host is set in the shell, and the shell structure is as follows Figure 6 As shown, Figure 7 Shows a top view of the housing, as Figure 6 As shown, there are 10 interfaces on the side of the shell for connecting external devices to the main control circuit board; Figure 7 As shown, the upper end surface of the shell is provided with a power button and 6 function buttons, and the six function buttons are test, low position, setting, platform, release, and high position.

[0161] The host is equipped with a power interface circuit for connecting to an external DC24V power supply. Figure 8As shown in the figure, the metal oxide semiconductor field effect transistor (MOSFET) Q1, diode D1 and resistor R1 together form a protection circuit to prevent reverse current; U1 serves to isolate the internal and external parts of the system circuit; LDO1 and U5 are low-dropout linear regulator (LDO) chips, which are used to convert the system voltage into DC5V and 3.3V respectively, thereby providing stable power supply for the system.

[0162] The host is provided with a winch encoder interface circuit for receiving encoder signals; Figure 9 The circuit structure of the encoder interface circuit is shown. Specifically, the encoder interface circuit is a one-channel height parameter acquisition module that uses an optoelectronic-digital tuning isolation coupling circuit. The control system in the application example of this application can accurately calculate the height of the big hook by collecting the parameters of the winch encoder. At the same time, according to the rotation direction of the encoder, the system can also determine whether the big hook is rising or falling.

[0163] The host is also provided with a display screen interface circuit for accessing a liquid crystal display screen; Figure 10 The circuit structure of the display interface circuit is shown; the display interface circuit includes a power-on / off circuit and a level conversion circuit. The power-on / off circuit is used to control the power on / off of the screen, and the level conversion circuit is used to convert the level between the MCU and the liquid crystal display. The TXS0108EPWR is responsible for converting the 3.3V level connected to the MCU into a 5V operating level suitable for the screen. The Q3AO3401, R7, R8, Q3 MMBT3904, R15 and R7 are mainly responsible for controlling the screen power on and off circuits. P3 is a 24-pin interface specifically used for connecting to the LCD screen.

[0164] The host is equipped with an analog interface circuit for accessing analog signals; the analog interface circuit includes a transmitter interface circuit, an analog channel selection circuit, an analog channel protection circuit, and an analog conversion circuit; the transmitter interface circuit mainly includes a sensor protection circuit and a 4-20ma transmitter circuit; Figure 11 As shown in the figure, the analog channel protection circuit uses the component ISO EM U1P1O4, which can isolate and transform the external sensor signal, convert it into an internal analog signal, and transmit it to the conversion unit AD12055, thereby achieving effective anti-interference function; the analog conversion circuit can use the ADS1255 ADC unit, as shown in the figure. Figure 12As shown in the figure, the ADS1255 ADC unit is responsible for collecting these analog signals and obtaining the corresponding engineering values. In addition, the analog signal channel selection circuit can use the analog signal channel selection switch DG408DYZ-T. DG408DYZ-T transmits the analog signals of the four channels to the MCU in sequence through the address lines A, B, and C, thereby completing the collection and calculation of engineering parameters.

[0165] The analog interface circuit includes the above-mentioned four analog input interfaces, which are respectively used to receive analog signals sent by the torque sensor, hook load sensor, fully sealed pressure sensor, and semi-sealed pressure sensor, and are respectively used to receive torque parameters, hook load parameters, fully sealed hydraulic parameters, and semi-sealed hydraulic parameters.

[0166] The host is equipped with a wireless output circuit for communicating with external devices, such as Figure 4 As shown; the host communicates with the automatic grouting control box through the wireless output circuit, thereby realizing the automatic grouting function; the wireless output circuit communicates through 433Mhz short wave.

[0167] The digital input circuit configured on the host includes the two switch input interfaces mentioned above, which are used to receive the switch signals sent by the fully sealed switch and the semi-sealed switch respectively, and are used to monitor whether the upper gate and the lower gate are open or closed; the digital input circuit can use an optoelectronic-digital tuning isolation coupling circuit to achieve electrical isolation between input and output; the circuit structure of the digital input circuit is as follows Figure 13 shown.

[0168] The host is also provided with a digital output circuit for outputting control signals, and the digital output circuit is used to output sound alarm control signals, brake control signals and brake signals respectively; Figure 14 The circuit structure of the digital output circuit is shown; the digital output circuit mainly includes resistors R26 and R27, transistor Q5 (model MMBT3904), and photoelectric relay AQV252GA. To ensure circuit safety, a protection circuit consisting of self-resetting fuses SMD1812P075TF / 33 and SMBJ30CA is also equipped.

[0169] Based on the above system architecture, the application example of this application also provides a drilling safety intelligent control method, including S1 to S6.

[0170] S1: height signal input;

[0171] The precise calculation of the traveling block height relies on a winch encoder mounted on the end of the winch drum shaft. The encoder effectively converts mechanical displacement into an electrical signal. As the winch drum rotates, the encoder rotates synchronously, accurately capturing the pulse signals during the rotation process. Based on the pulse signals, the wire rope length is calculated, and the specific height of the traveling block hook is determined.

[0172] S2: Four-channel analog signal input;

[0173] The first channel collects the pressure signal of the fully sealed hydraulic system from the remote control console;

[0174] The second channel collects the pressure signal of semi-sealed hydraulic pressure from the remote control console;

[0175] The third channel collects the pressure load signal of the hook;

[0176] The fourth channel collects torque signals.

[0177] S3: Two-way digital signal input;

[0178] Here, the two digital signals are also two switching signals, namely the fully closed and semi-closed switching signals, which are used to reflect the switching status of semi-closed and fully closed respectively. The switching signals are collected through the pressure switch on the remote control console and the proximity switch or Hall switch or other devices for detecting the gate position to ensure that the open or closed status of the blowout preventer gate is accurately obtained.

[0179] S4: perform data processing according to the input signal;

[0180] Specifically, the data processing unit 103 uses a high-performance STM32F103 processor with a main frequency of 72Mhz;

[0181] The processor is used to isolate and digitally convert analog signals to generate corresponding engineering values ​​such as pressure and torque;

[0182] At the same time, the processor is also used to convert the pulse signal of the winch sensor into a height signal, and the switch signal into the corresponding engineering value;

[0183] At the same time, the processor is also used to compare key parameters such as hook height, hook load, torque, etc. with preset thresholds in real time. When exceeded, it will trigger an alarm, brake action or send a brake signal.

[0184] Here, the alarm is installed near the driller and connected to the sound alarm interface of the main engine. When it detects that the traveling block has reached the predetermined position (i.e., the first warning position), it will emit a slower frequency warning sound. Once the traveling block reaches the braking position (i.e., the second warning position), the system will emit an alarm sound with a faster frequency.

[0185] The electronic pneumatic control valve is installed at the bottom of the winch disc and is connected in parallel with the overwind valve. When the main engine determines that there is a collision risk (i.e., it reaches the risk warning position), it can send a brake signal to the winch brake system through the brake signal output terminal to stop the drum from rotating and prevent the traveling block from continuing to move.

[0186] The system is also equipped with a brake solenoid valve interface that can directly output a switch signal to trigger a brake shutdown.

[0187] S5: Execute the anti-break operation according to the data processing result;

[0188] Among them, the control operation includes anti-lifting and breaking operation; specifically, the status of the gate is judged by monitoring the hydraulic oil pressure installed in the opening pipeline of the upper gate or lower gate; when the gate is in the closed state, the corresponding pipeline pressure will rise, and the system uses pressure sensors to detect this pressure change, so as to accurately judge whether the gate has been started or closed; to ensure safety, when the pressure of any gate exceeds 11Mpa, the system will automatically identify it as closed and prohibit the drilling operation in this case.

[0189] The control operation also includes anti-collision control; specifically, during the drill lifting process, when the traveling carriage reaches the preset second-level platform, the system will issue a 3-second warning sound; when it reaches 2 meters before the brake position, it will continue to issue a sound warning; when it reaches the brake position, the electromagnetic system will be activated, the winch will be locked, and braking will be achieved; when the operator releases the brake, the drill bit can be lowered. When it is lowered to the low position, the system will automatically implement low-position braking and send a brake signal.

[0190] Among them, the anti-lift-off operation can also rely on the electronic switch signal on the remote control console to detect the position of the gate; specifically, two switch signals are collected, corresponding to the semi-sealed and fully sealed switch states respectively. These signals can be provided by the remote control console, specifically through the pressure switch installed on the hydraulic oil pipeline of the remote control console, and the proximity switch or Hall switch and other devices that detect the open / close position of the gate. Such a design ensures that the system can accurately obtain the position status of the blowout preventer gate, that is, its open or closed signal; in this way, the system can obtain the position information of the gate in real time, and take corresponding control measures when necessary to prevent the occurrence of lifting and breaking accidents.

[0191] S6: Execute automatic grouting operation according to the data processing results.

[0192] Specifically, the system accurately calculates that when the number of drill bits replaced exceeds three each time, it determines that the system needs to perform grouting. At this time, the system sends a grouting instruction to the grouting control box through the wireless unit to realize the automatic grouting function.

[0193] This application example has the following advantages:

[0194] (1) By integrating multiple important functions, it can significantly improve the safety and efficiency of oil drilling operations;

[0195] (2) In terms of collision prevention, it can accurately monitor the position of the traveling pulley of the oil drilling rig. When the pulley approaches the overhead crane, it will quickly sound an alarm and apply the brakes, effectively avoiding collision accidents and ensuring the safety of the equipment.

[0196] (3) In terms of auxiliary operation, it can accurately display the real-time height of the traveling block, hook load, torque, etc., helping operators to better control the lifting of the drilling tools. It can also record data to provide a basis for subsequent analysis and operation optimization;

[0197] (3) In terms of preventing breakage, it can effectively prevent damage to drilling tools in special situations such as blowout preventer locking, thus ensuring the safety of operators;

[0198] (4) In terms of automatic grouting, on the one hand, it can balance the formation pressure and increase the pressure of the liquid column in the well through automatic grouting, thereby preventing the formation fluid from invading the wellbore, avoiding dangerous situations such as well kicks and blowouts, and maintaining stable downhole pressure; on the other hand, it can also realize automatic cleaning of the wellbore, allowing the drilling fluid to smoothly carry the rock cuttings generated by the drill bit breaking the rock to the ground during the circulation process, ensuring the normal operation of the drill bit and thus improving drilling efficiency.

[0199] It should be noted that: "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0200] In addition, the technical solutions described in the embodiments of the present application can be arbitrarily combined without conflict.

[0201] The above description is merely a preferred embodiment of the present application and is not intended to limit the scope of protection of the present application.

Claims

1. An intelligent safety control device for a drilling system, wherein the drilling system comprises a drawworks, a drawworks brake mechanism, a crown block, a traveling block, and a blowout preventer, wherein the blowout preventer comprises a plugging assembly; characterized in that: The device includes a signal acquisition unit, a warning unit and a processing unit; wherein, The signal acquisition unit includes an encoder, a hydraulic sensor, and a position switch; the encoder is arranged on the drum shaft of the winch and is used to collect the mechanical displacement parameters of the drum shaft of the winch; the hydraulic sensor is arranged in the hydraulic oil pipeline of the blowout preventer plugging assembly and is used to collect the pressure parameters of the hydraulic oil pipeline and generate an analog signal; the position switch is arranged at the blowout preventer plugging assembly and is used to detect the position of the plugging assembly and generate a digital signal; The first signal input end of the processing unit is connected to the signal output end of the encoder, and the control end of the processing unit is connected to the controlled end of the warning unit; the processing unit is used to determine the height information of the traveling block based on the mechanical displacement parameter; and is used to determine whether the traveling block has reached a preset position based on the height information, and perform a corresponding braking operation when it reaches the preset position; there are multiple preset positions, and the braking operations for different preset positions are different; and based on the analog signal and the digital signal, the locking state of the blowout preventer is judged, and an anti-lifting operation is performed when the blowout preventer is locked; wherein, The processing unit may also be configured to: determine, based on the height information, whether the traveling block has reached a preset upper limit position; determine, when the traveling block reaches the upper limit position and remains there for more than n seconds, that the traveling block is in a drill tool replacement state, where n ≥ 12; determine, when the number of times the traveling block has been in the drill tool replacement state within a current counting cycle reaches N times, where N ≥ 3; and, if the number of times reaches N times, generate a second control signal and send it to the grouting control box; the second control signal is used to instruct the grouting control box to perform an automatic grouting operation; The signal acquisition unit further includes a torque sensor and a load pressure sensor; the torque sensor and the load pressure sensor are arranged on the big hook of the traveling block, and the signal output ends of the torque sensor and the load pressure sensor are connected to the second signal input end of the processing unit; the torque sensor is used to collect the torque parameter of the big hook of the traveling block, and the load pressure sensor is used to collect the load parameter of the big hook of the traveling block; the processing unit is further used to determine the moving direction of the traveling block based on the mechanical displacement parameter; based on the moving direction, the torque parameter and the load parameter, determine whether the moving state of the traveling block is normal, and if the moving state is abnormal, generate a first control signal and send it to the winch brake mechanism; When judging whether the moving state of the traveling pulley is normal, the normal torque range of different load parameters in different moving directions is preset in advance, and it is judged whether the current torque parameter exceeds the corresponding torque range. If it exceeds, it is judged that the current moving state is abnormal.

2. The device according to claim 1, characterized in that The preset positions include the second-floor platform position, the warning position, and the upper brake position; the processing unit is used to: When the traveling block reaches the second-floor platform position, controlling the warning unit to perform a first warning operation; When the warning position is reached, controlling the warning unit to perform a second warning operation; When the upper brake position is reached, a first control signal is generated and sent to the winch brake mechanism to control the winch brake mechanism to perform a braking operation.

3. The device according to claim 1, characterized in that The blowout preventer is a double-gate blowout preventer; the plugging assembly includes an upper gate and a lower gate, the upper gate is a full-seal assembly for fully sealing the wellhead, and the lower gate is a semi-seal assembly for annularly sealing the wellhead; The processing unit is configured to: Based on the analog signal, determining whether the hydraulic parameter exceeds a preset hydraulic threshold, and determining that the blowout preventer is locked when the hydraulic parameter exceeds the preset hydraulic threshold; or, Based on the digital signal, it is determined whether the upper gate or the lower gate is closed, and when either gate is closed, it is determined that the blowout preventer is locked.

4. An intelligent safety control method for a drilling system, applied to the device according to claim 1, characterized in that: The method comprises: collecting mechanical displacement parameters of the winch drum shaft, and determining height information of the traveling block based on the mechanical displacement parameters; Based on the height information, determining whether the traveling block has reached a preset position, and performing a corresponding braking operation when reaching the preset position; there are multiple preset positions, and the braking operations for different preset positions are different; Based on the analog signal and the digital signal, the locking state of the blowout preventer is judged, and the anti-lift-off operation is performed when the blowout preventer is locked; the analog signal is generated by collecting the pressure parameters of the hydraulic oil pipeline of the blowout preventer plugging assembly, and the digital signal is generated by detecting the in-place state of the plugging assembly; wherein, The method further includes: determining, based on the height information, whether the traveling block has reached a preset upper limit position; determining that the traveling block is in a drill tool replacement state when the traveling block reaches the upper limit position and remains there for more than n seconds, where n is greater than or equal to 12; determining whether the number of times the traveling block has been in the drill tool replacement state within a current counting cycle reaches N times, where N is greater than or equal to 3; and generating a second control signal and sending it to a grouting control box if the number of times reaches N times; the second control signal is used to instruct the grouting control box to perform an automatic grouting operation; The method also includes: collecting torque parameters and load parameters of the traveling block hook; determining the moving direction of the traveling block based on the mechanical displacement parameters; judging whether the moving state of the traveling block is normal based on the moving direction, the torque parameters and the load parameters; generating a first control signal and sending it to the winch brake mechanism when the moving state is abnormal; wherein, when judging whether the moving state of the traveling block is normal, normal torque ranges for different load parameters in different moving directions are preset in advance, judging whether the current torque parameter exceeds the corresponding torque range, and judging that the current moving state is abnormal if it exceeds.

5. The method according to claim 4, characterized in that The preset positions include the second-floor platform position, the warning position and the upper brake position; The performing of a corresponding braking operation when reaching a preset position includes: When the traveling block reaches the second-floor platform position, the warning unit is controlled to perform the first warning operation; When the warning position is reached, controlling the warning unit to perform a second warning operation; When the upper brake position is reached, a first control signal is generated and sent to the winch brake mechanism; In response to the first control signal, the winch brake mechanism performs a braking operation.

6. The method according to claim 5, characterized in that The preset position also includes upper and lower anti-smashing positions, and the lower anti-smashing position is arranged below the brake position; The step of performing a corresponding braking operation when reaching a preset position further includes: When the preset lower anti-smashing position is reached, a first control signal is generated and sent to the winch brake mechanism.

7. The method according to claim 4, characterized in that The blowout preventer is a double-gate blowout preventer; the plugging assembly includes an upper gate and a lower gate, the upper gate is a full-seal assembly for fully sealing the wellhead, and the lower gate is a semi-seal assembly for annularly sealing the wellhead; the method of judging the locking state of the blowout preventer based on the analog signal and the digital signal includes: Based on the analog signal, determining whether the hydraulic parameter exceeds a preset threshold, and determining that the blowout preventer is locked if the preset threshold is exceeded; or, Based on the digital signal, it is determined whether the upper gate and the lower gate are closed, and when any gate is closed, it is determined that the blowout preventer is locked.

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