Push-against rotary steering structure based on prediction of drilling build-up rate

Abstract

The present invention discloses a push-against type rotary steering structure based on prediction of the drilling build-up rate. Aiming at the problem that in the process of predicting the build-up rate of a push-against type rotary steering tool, the influence of the action execution control mode of the push-against blocks is not considered, resulting in low prediction accuracy of the build-up rate, it obtains real-time monitoring of drilling parameters and conducts data analysis, analyzes the real-time working conditions by combining the drilling clearance in the drilling parameters with the deflection angle of the drilling stable platform to obtain the current drilling build-up rate, and provides a guiding compensation action for the prediction process of the drilling build-up rate. Specifically, the push-against blocks actively perform action compensation through a hydraulic execution component. On the basis of ensuring the normal operation of the steering tool with a small-diameter structure, it is crucial to avoid the mutual influence and restriction between the drill string and the wellbore during the penetration process, improve the stability and efficiency of the drilling operation, and provide effective technical support for the drilling of complex wellbore trajectories.

Description

Technical Field

[0001] The present invention relates to the technical field of rotary steerable tools, and particularly to a push - type rotary steerable structure based on prediction of drilling build - up rate. Background Art

[0002] The push - type rotary steerable tool controls the magnitude and direction of the bit lateral force by pushing against the wellbore wall with push - off blocks to achieve directional drilling. The push - type rotary steerable tool has strong inclination - maintaining and inclination - preventing capabilities, which can effectively improve the drilling efficiency and the quality of the wellbore trajectory. The formation of the wellbore trajectory is the result of the combined action of the bit and the formation, and the control of the build - up rate is the key to directional well operations.

[0003] With the increasing number of medium - short radius horizontal wells and sidetracks, the requirement for increasing the build - up rate is also increasing, and the accuracy requirement for the wellbore trajectory is getting higher and higher, making the control more difficult. Therefore, it is necessary to accurately predict the build - up rate and improve the adjustment and control ability of the tool face. Generally, the influencing factors to be considered include the drill string assembly and the structural parameters of the directional tool, drilling process parameters, and formation characteristics, so as to basically meet the safe drilling requirements in complex formations.

[0004] However, in practical applications, for the prediction of the build - up rate of the push - type rotary steerable tool, in the prior art, the push - off block uses an internal hydraulic folding structure to complete the steering. This not only has a complex structure and increases the radial cross - sectional area of the rotary steerable tool, but also does not consider the influence of the action execution control mode of the push - off block, resulting in a low prediction accuracy of the build - up rate. Therefore, this application proposes a solution. Summary of the Invention

[0005] The purpose of the present invention is to provide a push - type rotary steerable structure based on prediction of drilling build - up rate, which is used to solve the technical problem that in the process of predicting the build - up rate of the push - type rotary steerable tool, the influence of the action execution control mode of the push - off block is not considered, resulting in a low prediction accuracy of the build - up rate.

[0006] The purpose of the present invention can be achieved by the following technical solutions: A push - type rotary steerable structure based on prediction of drilling build - up rate includes a drill collar body, a bit body, and a mandrel arranged on the drill string. A hydraulic execution component is arranged between the drill collar body and the bit body, and a drilling stability platform is externally connected to the hydraulic execution component. A measurement component and a logging component are respectively connected to both sides of the drill collar body. A stability component is arranged at an interval between the hydraulic execution component and the measurement component. An oil cylinder component and a flexible sub connected to the hydraulic execution component are arranged between a pair of the stability components.

[0007] The hydraulic execution assembly includes a sleeve sleeved outside the mandrel. A pushing structure is slidably installed radially inside the sleeve. The pushing structure includes an inner sliding piece, a guiding rod column and a pushing rib plate connected to each other. Hydraulic inner cavities and hydraulic outer cavities respectively communicating with the oil inlet and outlet ends of the oil cylinder assembly are arranged on the inner and outer sides of the sleeve corresponding to the inner sliding piece.

[0008] It is further set that: the drill bit body is connected to the hydraulic execution assembly through a coupling. The mandrel penetrates through the middle parts of the hydraulic execution assembly, the coupling, the stabilizing assembly, the flexible sub, the oil cylinder assembly, the measuring assembly, the drill collar body and the logging assembly and is connected to the drill bit body. A central hole communicating with the drill bit body is provided in the middle of the mandrel.

[0009] It is further set that: the stabilizing assembly includes stabilizer A and stabilizer B. Sub-connections and female connections are respectively installed at the front and rear ends of stabilizer A and stabilizer B. Stabilizer A is connected to the sleeve and the flexible sub through the sub-connection and the female connection respectively. Stabilizer B is connected to the oil cylinder assembly and the measuring assembly through the sub-connection and the female connection respectively.

[0010] It is further set that: the hydraulic inner cavity is connected with a communication channel A, and the hydraulic outer cavity is connected with a communication channel B.

[0011] It is further set that: the communication channel A is connected with a compensation hole communicating with the oil outlet end of the oil cylinder assembly, and the communication channel B is connected with an oil storage hole communicating with the oil inlet end of the oil cylinder assembly.

[0012] It is further set that: a temperature regulating assembly is installed at one end of the oil cylinder assembly close to the flexible sub. The temperature regulating assembly is used for regulating the coating temperature of the oil cylinder assembly, the compensation hole and the oil storage hole.

[0013] It is further set that: a control system is built in the drilling stability platform. The control system includes a parameter acquisition module, an oil body monitoring module, a hydraulic analysis module, an execution control module and a temperature management module which are communicatively connected to each other. The parameter acquisition module can collect information of the hydraulic oil in the compensation hole and the oil storage hole to obtain hydraulic oil information, and send the hydraulic oil information to the oil body monitoring module and the hydraulic analysis module;

[0014] The hydraulic analysis module analyzes the hydraulic oil information and generates an oil pressure normal signal and an oil pressure abnormal signal;

[0015] The oil body monitoring module can control the drilling stability platform to measure the temperature of the hydraulic oil, obtain the hydraulic oil information and perform data analysis during the temperature control process of the hydraulic oil, generate a temperature qualified signal and a temperature abnormal signal, and send the temperature qualified signal and the temperature abnormal signal to the hydraulic analysis module;

[0016] The hydraulic analysis module combines and compares the received qualified temperature signal and abnormal temperature signal with the generated normal oil pressure signal and abnormal oil pressure signal to generate a maintenance monitoring signal and a temperature control monitoring signal, and sends the maintenance monitoring signal and the temperature control monitoring signal to the temperature management module; after receiving the maintenance monitoring signal, the temperature management module generates a signal for normal operation of the equipment, and sends the signal for normal operation of the equipment to the execution control module for predicting the drilling build rate of the drilling stability platform. After receiving the temperature control monitoring signal, the temperature management module performs graphical analysis and reflects the degree of abnormal operation of the current drilling stability platform according to the analysis result.

[0017] It is further set that the execution control process of the hydraulic execution component by the execution control module is as follows:

[0018] Step 1: Immediately after receiving the signal for normal operation of the equipment, reverse the operation parameters of the current drilling stability platform to obtain the wellbore size DH, the size DS of the stabilizing component, the center distance between stabilizer A and stabilizer B , the distance between stabilizer A and the bottom surface of the drill bit body ;

[0019] Step 2: Construct a build rate calculation formula and obtain the drilling build rate of the current drilling stability platform;

[0020] Step 3: Compare and analyze the generated drilling build rate with the system-predefined build rate, and continuously control the sliding position of the push rib at the execution end of the hydraulic execution component to ensure the safe progress of the drilling process.

[0021] The present invention has the following beneficial effects:

[0022] Aiming at the technical problem of low prediction accuracy of the build rate in the build rate prediction process of the push-type rotary steering tool, which does not consider the influence of the action execution control mode of the push block, the present invention obtains real-time monitoring of drilling parameters and conducts data analysis. Based on the drilling gap in the drilling parameters and the deflection angle of the drilling stability platform, real-time working conditions are analyzed to obtain the current drilling build rate, and a guiding compensation action is provided for the build rate prediction process. Specifically, the push block actively compensates through the hydraulic execution component. On the basis of ensuring the normal operation of the steering tool, it is crucial to avoid the mutual influence and restriction between the drill string and the wellbore wall during the penetration process, improve the stability and efficiency of the drilling operation, and provide effective technical support for the drilling of complex wellbore trajectories.

[0023] During the process of adjusting the cladding temperature, the oil cylinder assembly and the temperature control assembly complete real-time hydraulic and temperature control for the temperature data and oil pressure data of the hydraulic oil, and combine the temperature data and oil pressure data to make corresponding guiding actions for the operation of the push-rotary steering structure, so that the push-rotary steering structure operates stably; and during the operation guidance process, the real-time display of image analysis is carried out on the mobile terminal of the drilling operator, and it is intuitively obtained whether the current temperature adjustment process meets the drilling requirements. Brief Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] Figure 1 Structural Schematic Diagram of the Present Invention;

[0026] Figure 2 Cross-sectional Structural Schematic Diagram of the Present Invention;

[0027] Figure 3 Cross-sectional View of the Hydraulic Actuator Assembly of the Present Invention;

[0028] Figure 4 Drilling Schematic Diagram of the Present Invention;

[0029] Figure 5 Hydraulic Execution Principle Diagram of the Present Invention;

[0030] Figure 6 Structural Schematic Diagram of the Build Rate Prediction Method of the Present Invention;

[0031] Figure 7 System Block Diagram of the Drilling Stable Platform of the Present Invention;

[0032] Figure 8 Flow Block Diagram of the Execution Control Module of the Present Invention.

[0033] In the figure: 1. Measuring assembly; 2. Drill collar body; 3. Logging assembly; 4. Oil cylinder assembly; 5. Temperature control assembly; 6. Flexible sub; 7. Stabilizer A; 8. Stabilizer B; 9. Hydraulic actuator assembly; 10. Coupling; 11. Bit body; 12. Pushing structure; 121. Inner sliding piece; 122. Guide rod column; 123. Pushing rib plate; 13. Mandrel; 14. Hydraulic inner cavity; 15. Hydraulic outer cavity; 16. Central hole; 17. Compensation hole; 18. Oil storage hole; 19. Communication channel A; 20. Communication channel B; 21. Male thread; 22. Female thread. Detailed Embodiments

[0034] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] Embodiment 1: In view of the technical problem that the influence of the action execution control mode of the pushing block is not considered in the build-up rate prediction process of the push-type rotary steering tool, resulting in low prediction accuracy of the build-up rate, the following technical solution is proposed:

[0036] Refer to Figure 1 - Figure 8 As shown, in this embodiment, the push-type rotary steering structure based on the build-up rate prediction of drilling includes a drill collar body 2, a bit body 11 and a mandrel 13 arranged on the drill string. A hydraulic actuator assembly 9 is arranged between the drill collar body 2 and the bit body 11. The hydraulic actuator assembly 9 is externally connected to a drilling stable platform. Measuring assemblies 1 and logging assemblies 3 are respectively connected to both sides of the drill collar body 2. A stabilizer assembly is arranged at an interval between the hydraulic actuator assembly 9 and the measuring assembly 1. An oil cylinder assembly 4 and a flexible sub 6 connected to the hydraulic actuator assembly 9 are arranged between a pair of stabilizer assemblies;

[0037] The hydraulic actuator assembly 9 includes a sleeve sleeved outside the mandrel 13. A pushing structure 12 is slidably installed in the sleeve along the radial direction. The pushing structure 12 includes an inner sliding piece 121, a guiding rod column 122 and a pushing rib plate 123 connected to each other. Hydraulic inner cavities 14 and hydraulic outer cavities 15 respectively communicated with the oil inlet and outlet ends of the oil cylinder assembly 4 are arranged on the inner and outer sides of the sleeve corresponding to the inner sliding piece 121;

[0038] Refer to Figure 2 As shown, the stabilizer assembly includes a stabilizer A 7 and a stabilizer B 8. Sub-connections 21 and female connections 22 are respectively installed at the front and rear ends of the stabilizer A 7 and the stabilizer B 8. The stabilizer A 7 is respectively connected to the sleeve and the flexible sub 6 through the sub-connection 21 and the female connection 22. The stabilizer B 8 is respectively connected to the oil cylinder assembly 4 and the measuring assembly 1 through the sub-connection 21 and the female connection 22;

[0039] Refer to Figure 3 As shown, the hydraulic inner cavity 14 is connected to a communication channel A 19. The hydraulic outer cavity 15 is connected to a communication channel B 20. The communication channel A 19 is connected to a compensation hole 17 communicated with the oil outlet end of the oil cylinder assembly 4. The communication channel B 20 is connected to an oil storage hole 18 communicated with the oil inlet end of the oil cylinder assembly 4.

[0040] Structural principle: The real-time execution of the offset movement direction of the pushing structure 12 is carried out through the oil cylinder assembly 4. Combining the symmetrically arranged stabilizer A7 and stabilizer B8 provides trajectory stability during drilling, and at the same time, real-time adjustment is carried out according to the predetermined drilling trajectory, enabling the drill string to independently provide a pushing force during the drilling process, which can avoid the mutual restriction and influence between the drill string and the wellbore during the penetration process.

[0041] Refer to Figure 6 and Figure 7 As shown, the drilling stability platform is internally equipped with a control system. The control system includes a parameter acquisition module, an oil body monitoring module, a hydraulic analysis module, an execution control module, and a temperature management module that are communicatively connected. The parameter acquisition module can collect information on the hydraulic oil in the compensation hole 17 and the oil storage hole 18 to obtain hydraulic oil information, and send the hydraulic oil information to the oil body monitoring module and the hydraulic analysis module;

[0042] The hydraulic analysis module analyzes the data of the hydraulic oil information and generates a normal oil pressure signal and an abnormal oil pressure signal;

[0043] The oil body monitoring module can control the drilling stability platform to measure the temperature of the hydraulic oil, obtain the hydraulic oil information and conduct data analysis during the temperature control process of the hydraulic oil, generate a qualified temperature signal and an abnormal temperature signal, and send the qualified temperature signal and the abnormal temperature signal to the hydraulic analysis module;

[0044] The hydraulic analysis module combines and compares the received qualified temperature signal and abnormal temperature signal with the generated normal oil pressure signal and abnormal oil pressure signal to generate a maintenance monitoring signal and a temperature control monitoring signal, and sends the maintenance monitoring signal and the temperature control monitoring signal to the temperature management module; The temperature management module generates an equipment normal operation signal after receiving the maintenance monitoring signal, and sends the equipment normal operation signal to the execution control module for predicting the drilling build-up rate of the drilling stability platform. After receiving the temperature control monitoring signal, the temperature management module conducts graphical analysis and reflects the abnormal operation degree of the current drilling stability platform according to the analysis result;

[0045] The execution control process of the hydraulic execution component 9 by the execution control module is as follows:

[0046] Step 1: Immediately reverse and retrieve the operating parameters of the current drilling stability platform after receiving the equipment normal operation signal, and obtain the wellbore size DH, the stabilizer assembly size DS, the center distance between the stabilizer A7 and the stabilizer B8 during the operation of the drilling stability platform, and the distance between the stabilizer A7 and the bottom surface of the drill bit body 11 ;

[0047] Step 2: Construct a build-up rate calculation formula where and represents the drilling clearance of the current drilling stable platform, is the deflection angle of the current drilling stable platform with the flexible sub 6 as the fulcrum. The input parameters are used to obtain the drilling build rate of the current drilling stable platform, where the drilling build rate K: The larger, the larger the value of K;

[0048] Step 3: Compare and analyze the generated drilling build rate K with the preset build rate Ky of the system, and control the sliding position of the push rib 123 at the execution end of the hydraulic actuator 9 in real time to ensure the safe progress of the drilling process;

[0049] The control process is as follows: When K > Ky, it means that the inclination of the current stable drilling unit exceeds the limit, and a guiding signal is sent to the oil cylinder assembly 4 in real time. The oil cylinder assembly 4 immediately sends the hydraulic oil to the communication channel B20 through the oil storage hole 18, and the hydraulic oil continues to enter the hydraulic outer cavity 15 through the communication channel B20. At this time, under the action of the hydraulic oil, the push structure 12 on the side with excessive inclination moves inward; similarly, the push structure 12 on the side without excessive inclination moves outward until the requirements of the build rate are met;

[0050] When K < Ky, it means that the inclination of the current stable drilling unit is insufficient, and a guiding signal is sent to the oil cylinder assembly 4 in real time. The oil cylinder assembly 4 immediately sends the hydraulic oil to the communication channel A19 through the compensation hole 17, and the hydraulic oil continues to enter the hydraulic inner cavity 14 through the communication channel A19. At this time, under the action of the hydraulic oil, the push structure 12 on the side with insufficient inclination moves outward; similarly, the push structure 12 on the side without insufficient inclination moves outward until the requirements of the build rate are met;

[0051] If K = Ky, it means that the build rate of the current stable drilling unit meets the requirements and no signal is generated.

[0052] Basic principle: The hydraulic control system based on the push-type rotary steering structure obtains and analyzes the data by real-time monitoring of the drilling parameters. The current drilling build rate is obtained through real-time working condition analysis by combining the drilling clearance in the drilling parameters with the deflection angle of the drilling stable platform, and provides a guiding compensation action for the prediction process of the drilling build rate. Specifically, the push block actively performs action compensation through the hydraulic actuator, so as to ensure the normal operation of the steering tool with a small diameter structure, and key avoids the mutual influence and restriction between the drill string and the wellbore during the drilling process, improves the stability and efficiency of the drilling operation, and provides effective technical support for the drilling of complex wellbore trajectories.

[0053] Embodiment 2: In this embodiment, through the additional hydraulic oil temperature control system, the temperature of the hydraulic oil in the hydraulic cavity of Embodiment 1 is controlled to ensure the stable operation of the push-type rotary steering structure, including:

[0054] Refer to Figure 1 and Figure 2 As shown, a temperature control assembly 5 is installed at one end of the oil cylinder assembly 4 close to the flexible sub 6. The temperature control assembly 5 is used to adjust the covering temperature of the oil cylinder assembly 4, the compensation hole 17, and the oil storage hole 18. The temperature is controlled by an electrothermal oil temperature controller in the prior art, specifically including the heating, maintaining, and cooling stages;

[0055] When the actual temperature is lower than the set value, the temperature controller sends a heating signal and controls the heating wire to heat; when the actual temperature approaches or reaches the set value, the temperature controller automatically adjusts the heating power to keep the temperature constant; if the temperature exceeds the set value, the cooling system is started to reduce the temperature through the cooling water circulation. Thus, the entire temperature adjustment process is completed. And since the temperature adjustment process of the entire temperature control assembly 5 is carried out synchronously during the drilling process and the relevant temperature adjustment principle is a mature technology in the prior art, only the principle is described here and the relevant steps are not elaborated too much;

[0056] The drill bit body 11 is connected to the hydraulic actuator assembly 9 through a coupling 10. The core shaft 13 passes through the middle parts of the hydraulic actuator assembly 9, the coupling 10, the stabilizing assembly, the flexible sub 6, the oil cylinder assembly 4, the measuring assembly 1, the drill collar body 2, and the logging assembly 3 and is connected to the drill bit body 11. A central hole 16 communicating with the drill bit body 11 is provided in the middle of the core shaft 13;

[0057] The hydraulic analysis module analyzes the data of the pressure values of the compensation hole 17 and the oil storage hole 18 in the hydraulic oil information. Specifically: the difference between the pressure value of the compensation hole 17 and the pressure value of the oil storage hole 18 is marked as the pressure difference value. Through the comparison and analysis of the absolute value of the pressure difference value with a preset pressure difference threshold, if the absolute value of the pressure difference value is greater than the pressure difference threshold, an oil pressure normal signal is generated; if the absolute value of the pressure difference value is less than the pressure difference threshold, an oil pressure abnormal signal is generated.

[0058] The process of the oil body monitoring module for measuring the temperature of the hydraulic oil is as follows: the oil body monitoring module analyzes the data of the temperature values of the compensation hole 17 and the oil storage hole 18 in the hydraulic oil information. Specifically: the difference between the temperature value of the compensation hole 17 and the temperature value of the oil storage hole 18 is marked as the temperature difference value. Through the comparison and analysis of the absolute value of the temperature difference value with a preset temperature difference threshold, if the absolute value of the temperature difference value is greater than the temperature difference threshold, a temperature qualified signal is generated; if the absolute value of the temperature difference value is less than the temperature difference threshold, a temperature abnormal signal is generated;

[0059] The hydraulic analysis module monitors and analyzes the received qualified temperature signal and abnormal temperature signal, as well as the generated normal oil pressure signal and abnormal oil pressure signal. The specific analysis process is as follows: If the hydraulic analysis module obtains a qualified temperature signal and a normal oil pressure signal, it indicates that the current push-rotary steering structure is operating normally and sends it to the temperature management module to generate a maintenance monitoring signal; If the hydraulic analysis module obtains an abnormal temperature signal or an abnormal oil pressure signal, it indicates that the current push-rotary steering structure is operating abnormally, generates a temperature control monitoring signal and conducts graphical analysis, and feeds back the analysis results to the mobile phone terminal of the drilling operator to remind the drilling operator to adjust the temperature or replace the hydraulic oil;

[0060] The graphical analysis process of the hydraulic analysis module after receiving the temperature control monitoring signal is as follows: Taking the running time t of the drill string as the horizontal coordinate axis and the ratio S of the absolute value of the difference between the temperature values of the compensation hole 17 and the oil storage hole 18 / the absolute value of the difference between the oil pressure value of the compensation hole 17 and the oil pressure value of the oil storage hole 18 as the vertical coordinate axis, draw a curve in the first quadrant. When the value of the oil pressure value of the compensation hole 17 - the oil pressure value of the oil storage hole 18 is constant, the larger the absolute value of the difference between the temperature values of the compensation hole 17 and the oil storage hole 18, the more abnormal the oil temperature of the current equipment operation; On the contrary, when the absolute value of the difference between the temperature values of the compensation hole 17 and the oil storage hole 18 is constant, the smaller the absolute value of the difference between the oil pressure value of the compensation hole 17 and the oil pressure value of the oil storage hole 18, the poorer the temperature adjustment effect of the current equipment operation;

[0061] Based on the above: When the current equipment operation is in the stage of abnormal oil temperature and abnormal pressure regulation, immediately reverse verify the current temperature values of the compensation hole 17 and the oil storage hole 18 and the oil pressure values of the compensation hole 17 and the oil storage hole 18, and conduct pressure regulation and temperature regulation of the hydraulic oil until it meets the normal operation standard of the equipment;

[0062] During image analysis: Specifically, by comparing the smooth curve of each time point t drawn within the time period Δt with the preset standard curve, obtain the longitudinal coordinate value of the time point t and mark it as the fluctuation data R, sum all the fluctuation data and calculate the average fluctuation data ,and obtain the temperature-pressure fluctuation discrete value WY through formula calculation by the hydraulic analysis module ,where n is a positive integer greater than zero; Then compare and analyze the temperature-pressure fluctuation discrete value WY with the preset fluctuation discrete threshold WYx. If the temperature-pressure fluctuation discrete value is greater than the preset temperature-pressure fluctuation discrete threshold, it indicates that the current equipment operation has a high degree of abnormality;

[0063] It should be noted that the abnormal operation degree of the current device is reflected by image analysis, and the current oil temperature and oil pressure data are inversely deduced according to the abnormal operation degree of the device. Finally, the action of the push - type drilling structure is guided based on the current oil temperature and oil pressure data to make the push - type rotary steering structure operate stably. During the operation guidance process, the real - time display of image analysis is carried out on the mobile terminal of the drilling operator to intuitively obtain whether the current temperature - adjusting process meets the drilling requirements.

[0064] Basic principle: When the hydraulic oil is adjusted for the coating temperature, the cylinder assembly and the temperature - adjusting assembly complete the real - time hydraulic and temperature control for the temperature data and oil pressure data of the hydraulic oil, and make corresponding guiding actions for the operation of the push - type rotary steering structure in combination with the temperature data and oil pressure data, so that the push - type rotary steering structure operates stably. During the operation guidance process, the real - time display of image analysis is carried out on the mobile terminal of the drilling operator to intuitively obtain whether the current temperature - adjusting process meets the drilling requirements.

[0065] Embodiment 3: As can be seen from Embodiment 1 and Embodiment 2 in combination, referring to Figure 8 shown, jointly constitute a method for predicting the build - up rate when the push - type rotary steering structure is applied to drilling operations, including the following steps:

[0066] S1: Immediately after receiving the signal of normal device operation, reverse - retrieve the operation parameters of the current drilling stable platform, and obtain the wellbore size DH, the size DS of the stabilizing assembly, the center distance between stabilizer A7 and stabilizer B8 , and the distance between stabilizer A7 and the bottom surface of the bit body 11 ;

[0067] S2: Construct a build - up rate calculation formula , where represents the drilling clearance of the current drilling stable platform, is the deflection angle of the current drilling stable platform with the flexible sub 6 as the fulcrum. Input the parameters to obtain the drilling build - up rate of the current drilling stable platform, where the drilling build - up rate K: The larger, the larger the K value;

[0068] S3: Compare and analyze the generated drilling build - up rate K with the system - preset build - up rate Ky, and control the sliding position of the push - rib plate 123 at the execution end of the hydraulic execution component 9 in real - time to ensure the safety of the drilling process;

[0069] S4: In the above S3, when K > Ky, it indicates that the inclination of the current stable drilling unit exceeds the limit, and a guiding signal is sent to the oil cylinder assembly 4 in real time. The oil cylinder assembly 4 immediately sends hydraulic oil to the communication channel B20 through the oil storage hole 18. The hydraulic oil continues to enter the hydraulic outer cavity 15 through the communication channel B20. At this time, under the action of the hydraulic oil, the pushing structure 12 on the side with excessive inclination moves inward; similarly, the pushing structure 12 not on the side with excessive inclination moves outward until the requirement of the build rate is met. When K < Ky, it indicates that the inclination of the current stable drilling unit is insufficient, and a guiding signal is sent to the oil cylinder assembly 4 in real time. The oil cylinder assembly 4 immediately sends hydraulic oil to the communication channel A19 through the compensation hole 17. The hydraulic oil continues to enter the hydraulic inner cavity 14 through the communication channel A19. At this time, under the action of the hydraulic oil, the pushing structure 12 on the side with insufficient inclination moves outward; similarly, the pushing structure 12 not on the side with insufficient inclination moves inward until the requirement of the build rate is met. If K = Ky, it indicates that the build rate of the current stable drilling unit meets the requirement, and no signal is generated.

[0070] In summary: On the one hand, the oil cylinder assembly 4 is used to execute the real-time movement direction of the pushing structure 12. The symmetrically arranged stabilizer A7 and stabilizer B8 are combined to provide trajectory stability during drilling, and at the same time, real-time adjustment is carried out according to the predetermined drilling trajectory to realize the independent provision of pushing force during the drilling of the drill string. Specifically: The real-time monitoring of drilling parameters is obtained and data analysis is carried out. The real-time working condition analysis is carried out based on the drilling clearance in the drilling parameters and the deflection angle of the drilling stable platform to obtain the current drilling build rate, and a guiding compensation action is provided for the prediction process of the drilling build rate. Specifically, the pushing block actively performs action compensation through the hydraulic execution component. On the basis of ensuring the normal operation of the guiding tool with a small-diameter structure, it is crucial to avoid the mutual influence and restriction between the drill string and the wellbore during the drilling process, improve the stability and efficiency of the drilling operation, and provide effective technical support for the drilling of complex wellbore trajectories.

[0071] On the other hand, during the process of adjusting the coating temperature of the hydraulic oil, the oil cylinder assembly and the temperature adjustment component complete real-time hydraulic and temperature control for the temperature data and oil pressure data of the hydraulic oil, and combined with the temperature data and oil pressure data, corresponding guiding actions are made for the operation of the push-type rotary steering structure to make the push-type rotary steering structure operate stably. And during the operation guidance process, the real-time display of image analysis is carried out on the mobile phone terminal of the drilling operator to directly obtain whether the current temperature adjustment process meets the drilling requirements.

[0072] The above formulas are all obtained by collecting a large amount of data for software simulation and selecting a formula close to the true value. The coefficients in the formula are set by those skilled in the art according to the actual situation. As described above, this is only a preferred specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, should be covered by the protection scope of the present invention.

Claims

1. The push-against type rotary steerable structure based on the prediction of the drilling build-up rate is characterized in that: It includes a drill collar body, a bit body and a mandrel arranged on the drill string. A hydraulic actuator assembly is arranged between the drill collar body and the bit body. The hydraulic actuator assembly is externally connected to a drilling stability platform. Measuring assemblies and logging assemblies are respectively connected to both sides of the drill collar body. A stabilizing assembly is arranged at an interval between the hydraulic actuator assembly and the measuring assembly. An oil cylinder assembly and a flexible sub connected to the hydraulic actuator assembly are arranged between a pair of the stabilizing assemblies; The hydraulic actuator assembly includes a sleeve sleeved outside the mandrel. A pushing structure is slidably installed in the sleeve along the radial direction. The pushing structure includes an inner sliding piece, a guide rod column and a pushing rib plate which are connected to each other. Hydraulic inner cavities and hydraulic outer cavities respectively communicated with the oil inlet and outlet ends of the oil cylinder assembly are arranged on the inner and outer sides of the sleeve corresponding to the inner sliding piece; The drilling stability platform is internally provided with a control system. The control system includes a parameter acquisition module, an oil body monitoring module, a hydraulic analysis module, an execution control module and a temperature management module which are communicatively connected to each other. The parameter acquisition module can collect information of the hydraulic oil in the compensation hole and the oil storage hole to obtain hydraulic oil information, and send the hydraulic oil information to the oil body monitoring module and the hydraulic analysis module; The hydraulic analysis module performs data analysis on the hydraulic oil information, and generates an oil pressure normal signal and an oil pressure abnormal signal; The oil body monitoring module can control the drilling stability platform to measure the temperature of the hydraulic oil, obtain the hydraulic oil information and perform data analysis during the temperature control process of the hydraulic oil, generate a temperature qualified signal and a temperature abnormal signal, and send the temperature qualified signal and the temperature abnormal signal to the hydraulic analysis module; The hydraulic analysis module combines and compares the received temperature qualified signal and temperature abnormal signal with the generated oil pressure normal signal and oil pressure abnormal signal to generate a maintenance monitoring signal and a temperature control monitoring signal, and sends the maintenance monitoring signal and the temperature control monitoring signal to the temperature management module; The temperature management module generates an equipment normal operation signal after receiving the maintenance monitoring signal, and sends the equipment normal operation signal to the execution control module to predict the drilling build-up rate of the drilling stability platform. After receiving the temperature control monitoring signal, the temperature management module performs graphical analysis and reflects the abnormal operation degree of the current drilling stability platform according to the analysis result; The execution control process of the execution control module for the hydraulic actuator assembly is as follows: Step 1: Immediately after receiving the signal of normal operation of the device, reverse the operation to retrieve the operating parameters of the current drilling stabilization platform, and obtain the wellbore size DH, stabilizer assembly size DS, center distance between stabilizer A and stabilizer B during the operation of the drilling stabilization platform , the distance between stabilizer A and the bottom surface of the bit body ; Step two: Construct a build-up rate calculation formula and obtain the drilling build-up rate of the current drilling stability platform; Step three: Compare and analyze the generated drilling build-up rate with the build-up rate preset in the system, and real-time control the sliding position of the pushing rib plate at the execution end of the hydraulic actuator assembly to ensure the safe progress of the drilling process.

2. The push-against type rotary steerable structure based on the prediction of the drilling build-up rate according to claim 1, wherein The bit body is connected to the hydraulic actuator assembly through a coupling. The mandrel penetrates through the middle parts of the hydraulic actuator assembly, the coupling, the stabilizing assembly, the flexible sub, the oil cylinder assembly, the measuring assembly, the drill collar body and the logging assembly and is connected to the bit body. A central hole communicated with the bit body is opened in the middle of the mandrel.

3. The push-against type rotary steerable structure based on the prediction of the drilling build-up rate according to claim 2, wherein, The stable components include stabilizer A and stabilizer B. Sub-buckles and mother-buckles are respectively installed at the front and rear ends of stabilizer A and stabilizer B. Stabilizer A is connected to the sleeve and the flexible short joint through the sub-buckle and the mother-buckle respectively. Stabilizer B is connected to the oil cylinder assembly and the measuring assembly through the sub-buckle and the mother-buckle respectively.

4. The push-against type rotary steerable structure based on the prediction of the drilling build-up rate according to claim 1, wherein The hydraulic inner cavity is connected with a communication channel A, and the hydraulic outer cavity is connected with a communication channel B.

5. The push-against type rotary steering structure based on the prediction of the drilling build-up rate according to claim 4, wherein, The communication channel A is connected with a compensation hole communicating with the oil outlet end of the oil cylinder assembly, and the communication channel B is connected with an oil storage hole communicating with the oil inlet end of the oil cylinder assembly.

6. The push-against rotary steering structure based on the prediction of the drilling build-up rate according to claim 3, characterized in that, A temperature regulation component is installed at one end of the oil cylinder assembly close to the flexible short joint. The temperature regulation component is used for regulating the coating temperature of the oil cylinder assembly, the compensation hole and the oil storage hole.

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