Drilling tool vibration suppression method and device based on bit pressure-torque relation optimization

Abstract

The invention provides a drilling tool vibration suppression method and device based on bit pressure-torque relation optimization. The method comprises the following steps: acquiring a reference relation model between a theoretical bit pressure value and a theoretical torque value of a drill bit under a configured target borehole size; the actual bit pressure value and the actual torque value in the drilling process are collected in real time; based on the reference relation model and the actual bit pressure value, determining an effective torque value under the actual bit pressure value; determining a torque deviation value based on the actual torque value and the effective torque value; the torque deviation value is compared with a preset vibration grade threshold value interval, a bit pressure optimizing and adjusting instruction is generated according to the threshold value interval where the torque deviation value is located, and the bit pressure optimizing and adjusting instruction is used for controlling the torque deviation value within a preset safety range so as to restrain vibration of the drilling tool. According to the method, active intervention is carried out from the source of energy generated by vibration, and conversion from passive bearing to active suppression is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of drilling engineering, in particular to a drilling tool vibration suppression method and device based on drilling pressure-torque relationship optimization. BACKGROUND

[0002] In drilling operations, especially in the construction process of upper large-diameter boreholes (such as 660mm, 444.5mm, 311.2mm), due to the large annular gap between the drilling tool and the wellbore and the relatively insufficient rigidity of the drill string, complex nonlinear vibration is prone to occur in the drilling tool underground. This vibration is characterized by strong whirling and jumping of the drilling tool, and its movement form includes rotation, revolution and oscillation, and it produces severe composite vibration in the axial, radial and tangential directions.

[0003] The existing technical means usually adopt passive dampers or increase centralizers in the drilling tool assembly to try to suppress the vibration. However, these methods have limitations: passive dampers cannot be self-adaptively adjusted according to the real-time downhole working conditions, and increasing centralizers may bring new risks of pipe sticking. The operating personnel mainly rely on experience to adjust the drilling pressure and rotation speed, which has great blindness and hysteresis, and it is difficult to effectively deal with complex composite vibration problems, resulting in aggravated fatigue damage of the drilling tool (especially the drill collar, swivel joint, etc.), early failure of threads, frequent damage of drill bits, and serious impact on drilling efficiency and operation safety. SUMMARY

[0004] The purpose of the embodiments of the present application is to provide a drilling tool vibration suppression method and device based on drilling pressure-torque relationship optimization, which actively intervenes from the energy source of vibration (drilling parameter mismatch) to realize the transition from passive bearing to active suppression, and improves the drilling efficiency and operation safety.

[0005] In a first aspect, a drilling tool vibration suppression method based on drilling pressure-torque relationship optimization is provided, which can include: obtaining a reference relationship model between a theoretical drilling pressure value and a theoretical torque value of a drill bit under a configured target borehole size; real-time acquisition of actual drilling pressure and actual torque values in the drilling process; determining an effective torque value under the actual drilling pressure value based on the reference relationship model and the actual drilling pressure value; determining a torque deviation value based on the actual torque value and the effective torque value; comparing the torque deviation value with a preset vibration level threshold interval, and generating a drilling pressure optimization adjustment instruction according to the threshold interval it is located in, the drilling pressure optimization adjustment instruction being used to control the torque deviation value within a predetermined safe range to suppress the drilling tool vibration.

[0006] In a possible implementation, the configuration process of the benchmark relationship model comprises: In the historical drilling process of the target wellbore size, the theoretical WOB value is gradually adjusted at a preset step size, and different theoretical WOB values and corresponding theoretical torque values are recorded; A least square method is used to perform linear regression fitting on different theoretical WOB values and corresponding theoretical torque values to obtain a WOB-torque fitting straight line model. The WOB-torque fitting straight line model is determined as the benchmark relationship model.

[0007] In a possible implementation, the preset vibration level threshold range includes at least a safe range and a dangerous range; the method further comprises: When the torque deviation value is in the safe range, a WOB maintaining instruction is generated to maintain the actual WOB value unchanged; When the torque deviation value enters the dangerous range, a target WOB value for adjustment is determined based on the sharpness value of the vibration corresponding to the torque deviation value, and a WOB adjustment instruction containing the target WOB value is generated.

[0008] In a possible implementation, determining the target WOB value for adjustment based on the sharpness value of the vibration corresponding to the torque deviation value comprises: If the sharpness value of the vibration is greater than a first preset degree threshold, the drilling rig is controlled to reduce the actual WOB value to a configured safe WOB value at a preset safe speed; If the sharpness value of the vibration is greater than a second preset degree threshold and less than the first preset degree threshold, a torque difference value between the actual torque value and a configured safe torque value is determined, and a theoretical WOB value corresponding to the torque difference value is determined based on the benchmark relationship model, and then the drilling rig is controlled to update the actual WOB value to the theoretical WOB value at a preset safe speed.

[0009] In a possible implementation, an optimization range is further provided between the safe range and the dangerous range; the method further comprises: When the torque deviation value is in the optimization range, a WOB fine-tuning instruction is generated to reduce the actual WOB value by a preset step size.

[0010] In a second aspect, a drilling tool vibration suppression device based on WOB-torque relationship optimization is provided, which can comprise: An acquisition unit is configured to acquire a benchmark relationship model between a theoretical WOB value and a theoretical torque value of a drill bit under a configured target wellbore size; A collection unit is configured to collect an actual WOB value and an actual torque value in a drilling process in real time. determining, based on the reference relationship model and the actual WOB value, an effective torque value under the actual WOB value; and determining, based on the actual torque value and the effective torque value, a torque deviation value; generating, based on the torque deviation value and a preset vibration level threshold interval, a WOB optimization adjustment instruction according to the threshold interval in which the torque deviation value is located, the WOB optimization adjustment instruction being used to control the torque deviation value within a predetermined safe range to suppress the vibration of the drilling tool.

[0011] In a third aspect, an electronic device is provided, which includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory complete communication with each other through the communication bus. The memory is configured to store a computer program. The processor is configured to execute the program stored on the memory to implement the method steps of any of the above first aspect.

[0012] In a fourth aspect, a computer readable storage medium is provided, which stores a computer program, and the computer program is executed by a processor to implement the method steps of any of the above first aspect.

[0013] In the drilling tool vibration suppression method and device based on WOB-torque relationship optimization provided by the embodiments of the present application, a reference relationship model between a theoretical WOB value and a theoretical torque value of a drill bit under a configured target borehole size is acquired; an actual WOB value and an actual torque value in a drilling process are collected in real time; based on the reference relationship model and the actual WOB value, an effective torque value under the actual WOB value is determined; based on the actual torque value and the effective torque value, a torque deviation value is determined; the torque deviation value is compared with a preset vibration level threshold interval, and a WOB optimization adjustment instruction is generated according to the threshold interval in which the torque deviation value is located, and the WOB optimization adjustment instruction is used to control the torque deviation value within a predetermined safe range to suppress the vibration of the drilling tool. The method actively intervenes from the energy source of vibration (drilling parameter mismatch), and realizes the change from passive bearing to active suppression. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0015] Figure 1A flowchart of a drilling tool vibration suppression method based on drilling pressure-torque relationship optimization provided by an embodiment of the present application is shown in FIG. 1. Figure 2 A structural diagram of a drilling tool vibration suppression device based on drilling pressure-torque relationship optimization provided by an embodiment of the present application is shown in FIG. 2. Figure 3 A structural diagram of an electronic device provided by an embodiment of the present application is shown in FIG. 3. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application. Unless otherwise defined, the technical terms or scientific terms used in the present application should be understood as the common meanings understood by those skilled in the art. The terms “first”, “second”, and similar terms used in the present application do not represent any order, number, or importance, but are only used to distinguish different components. The terms “include”, “contain”, and similar terms mean that the components or objects before the terms cover the components or objects listed after the terms and their equivalents, but do not exclude other components or objects. The terms “connect”, “couple”, or “link” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “up”, “down”, “left”, “right”, and the like are only used to represent relative positional relationships, and when the absolute positions of the described objects change, the relative positional relationships may also change accordingly.

[0017] The drilling tool vibration suppression method based on drilling pressure-torque relationship optimization provided by the embodiments of the present application aims to solve the main technical problem of how to actively and accurately control drilling parameters to effectively suppress the complex composite vibration (including axial, radial, and tangential vibration) of the drilling tool in a large borehole, thereby reducing the failure rate of the drilling tool and replacing or reducing the dependence on mechanical vibration reduction devices. The prior art lacks a parameter optimization method based on a drilling tool dynamics model and relying on data, which cannot realize the transition from passive bearing vibration to active vibration suppression. The method constructs an intelligent closed-loop control system for perception, diagnosis, decision-making, and execution, and based on real-time analysis and optimization of core parameters in the drilling process, the vibration energy is reduced from the root cause, thereby effectively reducing the failure rate of the drilling tool and improving the drilling efficiency and safety.

[0018] The preferred embodiments of the present application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to explain and illustrate the present application, and are not used to limit the present application, and the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0019] Figure 1 A flowchart of a drilling tool vibration suppression method based on a drilling pressure-torque relationship optimization is provided for the embodiments of the present application. As shown in the figure, Figure 1 the method can include: Step S110, obtaining a reference relationship model between a theoretical drilling pressure value and a theoretical torque value of a drill bit under a configured target wellbore size.

[0020] In a specific implementation, in the historical drilling process of the target wellbore size, the theoretical drilling pressure value is gradually adjusted in a preset step, and different theoretical drilling pressure values and corresponding theoretical torque values are recorded; the least square method is used to linearly regress and fit the different theoretical drilling pressure values and the corresponding theoretical torque values, to obtain a drilling pressure-torque fitting straight line model; and the drilling pressure-torque fitting straight line model is determined as the reference relationship model.

[0021] In a specific implementation, when the drill bit enters a new formation or at the initial stage of a well section, scanning is performed in a preset step (such as 2 tons) within a reasonable expected drilling pressure range (such as 10-30 tons).

[0022] At each drilling pressure setting point, after waiting for the drilling speed and torque to be stable, drilling pressure (WOB) and torque (TOR) data within a period of time (such as 30 seconds) are collected at a high speed.

[0023] The torque data sequence of each stable point is subjected to moving average filtering and outlier rejection, and the average value thereof is taken as the effective torque value under the drilling pressure. Finally, the least square method is used to linearly regress and fit a plurality of (WOB, TOR) data points, to obtain a unique reference model: TOR_effective=k*WOB+b. The model is the reference relationship model under the current wellbore, drilling tool and formation combination.

[0024] Step S120, real-time collection of actual drilling pressure values and actual torque values in the drilling process.

[0025] The filtered actual drilling pressure value (WOB_actual) and the actual torque value (TOR_actual) are collected in real time.

[0026] Step S130, determination of an effective torque value under the actual drilling pressure value based on the reference relationship model and the actual drilling pressure value.

[0027] The actual WOB value (WOB_actual) is substituted into the established reference relationship model to calculate the effective torque value under the current WOB value. If there is no severe vibration, the theoretical torque value TOR_effective, i.e., the expected value of the actual WOB value (WOB_actual), should be obtained.

[0028] In step S140, a torque deviation value is determined based on the actual torque value and the effective torque value.

[0029] In a specific implementation, the difference between the actual torque value and the effective torque value can be determined as the torque deviation value ΔTOR. The physical meaning of the ΔTOR is clearly defined as: the torque energy generated purely by harmful vibrations (such as random impacts of the drilling tool on the well wall, sliding friction) in addition to the normal formation cutting and system inherent friction. The absolute value directly and quantitatively reflects the intensity of the vibration.

[0030] In step S150, the torque deviation value is compared with a preset vibration level threshold interval, and a WOB optimization adjustment instruction is generated according to the threshold interval in which the torque deviation value is located.

[0031] The WOB optimization adjustment instruction is used to control the torque deviation value within a predetermined safe range to suppress the vibration of the drilling tool.

[0032] The preset vibration level threshold interval can include at least one safe interval and one dangerous interval. When the torque deviation value is in the safe interval, a WOB maintenance instruction is generated to maintain the actual WOB value unchanged. When the torque deviation value enters the dangerous interval, a target WOB value is determined based on the vibration sharpness value corresponding to the torque deviation value, and a WOB adjustment instruction containing the target WOB value is generated. Specifically, it includes: If the vibration sharpness value is greater than a first preset degree threshold, the drilling machine is controlled to reduce the actual WOB value to a configured safe WOB value at a preset safe rate. If the vibration sharpness value is greater than a second preset degree threshold and less than the first preset degree threshold, a torque difference value between the actual torque value and a configured safe torque value is determined, and a theoretical WOB value corresponding to the torque difference value is determined based on the reference relationship model. Then, the drilling machine is controlled to update the actual WOB value to the theoretical WOB value at a preset safe rate.

[0033] Further, an optimization interval can be provided between the safe interval and the dangerous interval. When the torque deviation value is in the optimization interval, a WOB fine-tuning instruction is generated to reduce the actual WOB value by a preset step size.

[0034] The preset step size is a WOB fine-tuning step size ΔWOB, and the calculation formula of the ΔWOB can be represented as:

[0035] where, ΔWOB: the step size of the current WOB adjustment (dimension: ton (t) or kilo-newton (kN)). It is a signed quantity, positive for increasing WOB, negative for decreasing WOB. In the optimization zone, it is usually negative (decreasing WOB).

[0036] K: adjustment coefficient (dimensionless). It is an empirical constant, usually taking a value of 0.1-0.5, used to control the amplitude of adjustment to avoid system oscillation caused by too large step size.

[0037] : current real-time WOB value (dimension: ton (t) or kilo-newton (kN)).

[0038] : current vibration efficiency coefficient (dimensionless). Its calculation formula is: , which represents the drilling rate per unit torque, is a key comprehensive index to measure the current drilling efficiency and vibration level.

[0039] : reference vibration efficiency coefficient (dimensionless). This value is calculated in the safe zone where the reference relationship model is established, and is the average value of multiple stable data points , representing the ideal efficiency level when the system is not severely vibrating.

[0040] It can be seen that this method does not roughly reduce the WOB, but generates a WOB fine-tuning instruction. For example, reduce the WOB by 1 ton in small steps, and closely observe the trend of ΔTOR. If ΔTOR decreases, it means that the optimization is effective; if there is little change, it may try to increase the WOB slightly. This is a dynamic, adaptive iterative optimization process, aiming to find the highest point of the mechanical drilling rate under the premise of controllable vibration.

[0041] The present application has the following beneficial effects: The vibration suppression effect is fundamentally improved: actively intervene from the energy source of vibration (drilling parameter mismatch), realizing the transition from passive bearing to active suppression, and the suppression effect of vibration is much better than passive mechanical method.

[0042] The service life of drilling tools is significantly prolonged: effectively reduces the fatigue damage, thread leakage and fracture risk of drilling tools, greatly prolongs the service life of bottom hole assembly (BHA), and saves the cost of expensive drilling tools.

[0043] Drilling efficiency and safety are improved simultaneously: through intelligent optimization of the optimization zone, the mechanical drilling rate is maximized under the premise of controllable vibration. Through the rapid and smooth response of the danger zone, the non-production time (such as tripping inspection, accident handling) and downhole tool damage risk caused by vibration are greatly reduced.

[0044] Corresponding to the above method, the embodiment of the present application also provides a drilling tool vibration suppression device based on drilling pressure-torque relationship optimization, as shown in the figure, the device comprises: Figure 2 An acquisition unit 210 is configured to acquire a reference relationship model between a theoretical drilling pressure value and a theoretical torque value of a drill bit under a target borehole size configured; A collection unit 220 is configured to collect actual drilling pressure values and actual torque values in a drilling process in real time; A determination unit 230 is configured to determine an effective torque value under the actual drilling pressure value based on the reference relationship model and the actual drilling pressure value, and determine a torque deviation value based on the actual torque value and the effective torque value; A generation unit 240 is configured to compare the torque deviation value with a preset vibration level threshold interval, generate a drilling pressure optimization adjustment instruction according to the threshold interval it is located in, and control the torque deviation value within a predetermined safe range to suppress drilling tool vibration.

[0045] The functions of each functional unit of the drilling tool vibration suppression device based on drilling pressure-torque relationship optimization provided by the above embodiment of the present application can be realized through the above method steps, therefore, the specific working process and beneficial effects of each unit in the drilling tool vibration suppression device based on drilling pressure-torque relationship optimization provided by the embodiment of the present application are not repeated here.

[0046] The embodiment of the present application also provides an electronic device, as shown in the figure, comprising a processor 310, a communication interface 320, a memory 330 and a communication bus 340, wherein the processor 310, the communication interface 320 and the memory 330 complete mutual communication through the communication bus 340. Figure 3

[0047] The memory 330 is configured to store a computer program; The processor 310 is configured to implement the following steps when executing the program stored in the memory 330: Acquire a reference relationship model between a theoretical drilling pressure value and a theoretical torque value of a drill bit under a target borehole size configured; Collect actual drilling pressure values and actual torque values in a drilling process in real time; Determine an effective torque value under the actual drilling pressure value based on the reference relationship model and the actual drilling pressure value; Determine a torque deviation value based on the actual torque value and the effective torque value; ​​The torque deviation value is compared with a preset vibration level threshold interval, and a WOB optimization adjustment instruction is generated according to the threshold interval in which the torque deviation value is located, the WOB optimization adjustment instruction being used to control the torque deviation value in a predetermined safe range to suppress the vibration of the drilling tool.

[0048] The communication bus can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The communication bus can be divided into an address bus, a data bus, a control bus, etc. For the convenience of representation, only one thick line is used in the figure, but it does not mean that there is only one bus or only one type of bus.

[0049] The communication interface is used for communication between the electronic device and other devices.

[0050] The memory can include a Random Access Memory (RAM) and can also include a Non-Volatile Memory (NVM), such as at least one disk memory. Optionally, the memory can also be at least one storage device located away from the aforementioned processor.

[0051] The processor described above can be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc. It can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component.

[0052] The implementation manners and beneficial effects of the electronic device in the above-mentioned embodiments can be achieved by the steps shown in the above-mentioned embodiments, and therefore, the specific working process and beneficial effects of the electronic device provided by the embodiments of the present application will not be repeated here. Figure 1 The specific working process and beneficial effects of the electronic device provided by the embodiments of the present application will not be repeated here.

[0053] In a further example provided in the present application, a computer readable storage medium is provided, and the computer readable storage medium stores instructions which, when executed on a computer, cause the computer to perform the drill string vibration suppression method based on the optimized drill bit pressure-torque relationship according to any one of the above examples.

[0054] In a further example provided in the present application, a computer program product containing instructions is provided, and the computer program product, when executed on a computer, causes the computer to perform the drill string vibration suppression method based on the optimized drill bit pressure-torque relationship according to any one of the above examples.

[0055] Those skilled in the art should understand that the examples in the present application can be provided as a method, a system, or a computer program product. Therefore, the examples in the present application can be in the form of an entirely hardware example, an entirely software example, or an example combining software and hardware aspects. Moreover, the examples in the present application can be in the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk memory, CD-ROM, optical memory, etc.) containing computer-usable program code.

[0056] The examples in the present application are described with reference to flowcharts and / or block diagrams according to the methods, devices (systems), and computer program products of the examples in the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce the functions specified in the flowcharts and / or block diagrams. Figure 1 The functions specified in a flow or multiple flows and / or blocks Figure 1 The functions specified in a flow or multiple flows and / or blocks

[0057] These computer program instructions can also be stored in a computer readable memory capable of directing the computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce a manufactured product including instruction devices, which implement the functions specified in the flowcharts and / or block diagrams. Figure 1 The functions specified in a flow or multiple flows and / or blocks Figure 1 The functions specified in a flow or multiple flows and / or blocks

[0058] These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are performed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide functions for implementing the functions specified in the flowcharts and / or block diagrams. Figure 1one or more processes and / or blocks Figure 1 the steps of the functions specified in the one or more blocks.

[0059] While the preferred embodiments in the application have been described, additional modifications and changes can occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims shall cover all such modifications and changes as fall within the true spirit and scope of the preferred embodiments in the application.

[0060] It will be readily apparent to those skilled in the art that various changes and modifications can be made to the preferred embodiments in the application without departing from the spirit and scope of the preferred embodiments in the application. Thus, it is intended that the application cover all such changes and modifications that fall within the scope of the preferred embodiments in the claims and their equivalents.

Claims

1. A method for suppressing drill string vibration based on drilling pressure-torque relationship optimization, characterized in that, The method includes: Obtain a benchmark relationship model between the theoretical drilling pressure and the theoretical torque of the drill bit under the configured target wellbore size; Real-time acquisition of actual drilling pressure and actual torque values ​​during the drilling process; Based on the benchmark relationship model and the actual drilling pressure value, the effective torque value under the actual drilling pressure value is determined; Based on the actual torque value and the effective torque value, determine the torque deviation value; The torque deviation value is compared with a preset vibration level threshold range. Based on the threshold range in which it is located, a drill pressure optimization adjustment command is generated. The drill pressure optimization adjustment command is used to control the torque deviation value within a predetermined safe range to suppress drill vibration.

2. The method as described in claim 1, characterized in that, The configuration process of the baseline relationship model includes: During the historical drilling process for the target wellbore size, the theoretical drilling pressure value is gradually adjusted with a preset step size, and different theoretical drilling pressure values ​​and the corresponding theoretical torque values ​​are recorded. The least squares method was used to perform linear regression fitting on different theoretical drill pressure values ​​and corresponding theoretical torque values ​​to obtain a drill pressure-torque fitting linear model. The drill pressure-torque fitting linear model is determined as the benchmark relationship model.

3. The method as described in claim 1, characterized in that, The preset vibration level threshold range includes at least one safe range and one dangerous range; The method further includes: When the torque deviation value is within the safe range, a drill pressure maintenance command is generated to maintain the actual drill pressure value unchanged; When the torque deviation value enters the danger zone, the target drill pressure value is determined based on the vibration abruptness value corresponding to the torque deviation value, and a drill pressure adjustment command containing the target drill pressure value is generated.

4. The method as described in claim 3, characterized in that, Based on the vibration abruptness value corresponding to the torque deviation value, the target drilling pressure value for adjustment is determined, including: If the vibration intensity value is greater than the first preset threshold, the drilling rig is controlled to reduce the actual drilling pressure value to the configured safe drilling pressure value at a preset safe rate. If the vibration severity value is greater than the second preset threshold and less than the first preset threshold, then the torque difference between the actual torque value and the configured safe torque value is determined, and based on the benchmark relationship model, the theoretical drilling pressure value corresponding to the torque difference is determined. Then, the drilling rig is controlled to update the actual drilling pressure value to the theoretical drilling pressure value at a preset safe rate.

5. The method as described in claim 3, characterized in that, Between the safe zone and the dangerous zone, there is also an optimization zone; The method further includes: When the torque deviation value is within the optimization range, a drill pressure fine-tuning command is generated to reduce the actual drill pressure value by a preset step size.

6. A drill string vibration suppression device based on drill pressure-torque relationship optimization, characterized in that, The device includes: The acquisition unit is used to acquire the benchmark relationship model between the theoretical drilling pressure and the theoretical torque of the drill bit under the configured target wellbore size. The data acquisition unit is used to collect the actual drilling pressure and actual torque values ​​during the drilling process in real time. The determining unit is configured to determine the effective torque value under the actual drill pressure value based on the benchmark relationship model and the actual drill pressure value; and to determine the torque deviation value based on the actual torque value and the effective torque value. The generation unit is used to compare the torque deviation value with a preset vibration level threshold range, and generate a drill pressure optimization adjustment command based on the threshold range in which it is located. The drill pressure optimization adjustment command is used to control the torque deviation value within a predetermined safe range to suppress drill vibration.

7. The apparatus as claimed in claim 6, characterized in that, The preset vibration level threshold range includes at least one safe range and one dangerous range; The generation unit is specifically used to: generate a drill pressure maintenance command to maintain the actual drill pressure value unchanged when the torque deviation value is in the safe range; and determine the target drill pressure value to be adjusted based on the vibration abruptness value corresponding to the torque deviation value when the torque deviation value enters the dangerous range, and generate a drill pressure adjustment command containing the target drill pressure value.

8. The apparatus as claimed in claim 7, characterized in that, The generating unit is also specifically used for: If the vibration intensity value is greater than the first preset threshold, the drilling rig is controlled to reduce the actual drilling pressure value to the configured safe drilling pressure value at a preset safe rate. If the vibration severity value is greater than the second preset threshold and less than the first preset threshold, then the torque difference between the actual torque value and the configured safe torque value is determined, and based on the benchmark relationship model, the theoretical drilling pressure value corresponding to the torque difference is determined. Then, the drilling rig is controlled to update the actual drilling pressure value to the theoretical drilling pressure value at a preset safe rate.

9. An electronic device, characterized in that, The electronic device includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; Memory, used to store computer programs; A processor, when executing a program stored in memory, implements the method of any one of claims 1-5.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the method described in any one of claims 1-5.

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