Push type rotary guiding structure based on drilling build-up rate prediction

Abstract

The invention discloses a pushing type rotary steering structure based on drilling build-up rate prediction, and aims to solve the problem of low build-up rate prediction precision caused by the fact that the influence of an action execution control mode of a pushing block is not considered in the build-up rate prediction process of a pushing type rotary steering tool. Drilling parameters are monitored and acquired in real time, data analysis is carried out, real-time working condition analysis is carried out by combining drilling gaps in the drilling parameters with the deflection angle of a drilling stabilized platform to obtain the current drilling build-up rate, and instructive compensation action is provided for the prediction process of the drilling build-up rate. Specifically, action compensation is actively carried out by a pushing block through a hydraulic execution assembly, on the basis that normal operation of a guiding tool of a small-diameter structure is ensured, mutual influence and restriction between a drilling tool and a well wall in the deep-going process are avoided, the stability and efficiency of drilling operation are improved, and the drilling efficiency is improved. And effective technical support is provided for drilling of a complex well track.

Description

Technical Field

[0001] The present invention relates to the technical field of rotary steering tools, and in particular to a push-type rotary steering structure based on drilling deflection rate prediction. Background Art

[0002] Push-type rotary steerable tools use a push block to push against the wellbore wall to control the lateral force, size, and direction of the drill bit, achieving directional drilling. Push-type rotary steerable tools have strong deflection stabilization and anti-deflection capabilities, which can effectively improve drilling efficiency and wellbore trajectory quality. The formation of the wellbore trajectory is the result of the combined action of the drill bit and the formation. Controlling the inclination rate is the key to directional drilling operations. With the increasing number of medium and short radius horizontal wells and sidetracking wells, the demand for improving the build rate is also increasing. The wellbore trajectory accuracy requirements are getting higher and higher, and the control difficulty is increasing. Therefore, it is necessary to better predict the build rate and improve the adjustment and control capabilities of the tool face. The influencing factors that usually need to be considered include the structural parameters of the drill string assembly and directional tools, drilling process parameters and formation characteristics, basically meeting the safe drilling needs of complex formations.

[0003] However, in actual applications, in the prediction of the inclination rate of a push-type rotary steering tool, the prior art uses a built-in hydraulic folding structure for the pushing block to complete the guidance. Not only is there a complex structure and the radial cross-sectional area of ​​the rotary steering tool is increased, but the influence of the action execution control method of the pushing block is not considered, resulting in low prediction accuracy of the inclination rate. For this reason, this application proposes a solution. Summary of the Invention

[0004] The purpose of the present invention is to provide a push-type rotary steering structure based on drilling inclination rate prediction, which is used to solve the technical problem that in the process of predicting the inclination rate of the push-type rotary steering tool, the influence of the action execution control method of the push block is not considered, resulting in low prediction accuracy of the inclination rate.

[0005] The objectives of the present invention can be achieved through the following technical solutions: a push-type rotary steering structure based on drilling inclination rate prediction includes a drill collar body, a drill bit body and a core shaft arranged on a drilling tool, a hydraulic actuator assembly is arranged between the drill collar body and the drill bit body, the hydraulic actuator assembly is externally connected to a drilling stabilization platform, a measuring assembly and a logging assembly are respectively connected to both sides of the drill collar body, a stabilization assembly is arranged between the hydraulic actuator assembly and the measuring assembly, and a pair of the stabilization assemblies are provided with a cylinder assembly and a flexible short section connected to the hydraulic actuator assembly; The hydraulic actuator assembly includes a sleeve sleeved on the outside of the core shaft, and a pushing structure is installed in the sleeve for radial sliding. The pushing structure includes a connected inner sliding plate, a guide rod column and a pushing rib plate. The sleeve is provided with a hydraulic inner cavity and a hydraulic outer cavity on the inner and outer sides corresponding to the inner sliding plate, which are respectively connected to the oil inlet and outlet ends of the cylinder assembly.

[0006] It is further configured as follows: the drill bit body is connected to the hydraulic actuator assembly through a coupling, the core shaft is inserted into the middle of the hydraulic actuator assembly, the coupling, the stabilizing assembly, the flexible short joint, the cylinder assembly, the measuring assembly, the drill collar body and the logging assembly and is connected to the drill bit body, and a center hole connected to the drill bit body is opened in the middle of the core shaft.

[0007] It is further configured as follows: the stabilizing assembly includes a stabilizer A and a stabilizer B, and the front and rear ends of the stabilizer A and the stabilizer B are respectively installed with a sub-buckle and a female buckle, the stabilizer A is connected to the sleeve and the flexible short section through the sub-buckle and the female buckle, and the stabilizer B is connected to the cylinder assembly and the measuring assembly through the sub-buckle and the female buckle.

[0008] It is further configured as follows: the hydraulic inner cavity is connected to a communication channel A, and the hydraulic outer cavity is connected to a communication channel B.

[0009] It is further configured as follows: the communication channel A is connected to a compensation hole connected to the oil outlet end of the cylinder assembly, and the communication channel B is connected to an oil storage hole connected to the oil inlet end of the cylinder assembly.

[0010] It is further configured that: a temperature regulating component is installed at one end of the oil cylinder assembly close to the flexible short joint, and the temperature regulating component is used to adjust the covering temperature of the oil cylinder assembly, the compensation hole, and the oil storage hole.

[0011] It is further configured that: the drilling stabilization platform is equipped with a built-in control system, the control system including a parameter acquisition module, an oil monitoring module, a hydraulic analysis module, an execution control module and a temperature management module that are communicatively connected to each other, the parameter acquisition module being capable of acquiring information about the hydraulic oil in the compensation hole and the oil storage hole to obtain hydraulic oil information, and sending the hydraulic oil information to the oil monitoring module and the hydraulic analysis module; The hydraulic analysis module performs data analysis on the hydraulic oil information and generates normal oil pressure signals and abnormal oil pressure signals; The oil monitoring module can control the drilling stabilization platform to measure the hydraulic oil temperature, obtain hydraulic oil information during the hydraulic oil temperature control process, perform data analysis, generate temperature compliance signals and temperature abnormality signals, and send the temperature compliance signals and temperature abnormality signals to the hydraulic analysis module; The hydraulic analysis module combines and compares the received temperature qualified signal and temperature abnormality signal with the generated oil pressure normal signal and oil pressure abnormality 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 receives the maintenance monitoring signal to generate a normal operation signal of the equipment, and sends the normal operation signal of the equipment to the execution control module to predict the drilling inclination rate of the drilling stable platform. After receiving the temperature control monitoring signal, the temperature management module performs a graphical analysis and reflects the degree of abnormal operation of the current drilling stable platform based on the analysis results.

[0012] It is further configured that the execution control process of the hydraulic actuator by the execution control module is as follows: Step 1: After receiving the normal operation signal of the equipment, immediately reverse the operation parameters of the current drilling stabilization platform to retrieve the wellbore size DH, stabilization component size DS, and the 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 drill body ; Step 2: Construct a calculation formula for the drilling inclination rate and obtain the drilling inclination rate of the current drilling stable platform; Step 3: Compare and analyze the generated drilling inclination rate with the system preset inclination rate, and control the sliding position of the push rib plate at the actuator end of the hydraulic actuator in real time to ensure the safety of the drilling process.

[0013] The present invention has the following beneficial effects: The present invention addresses the technical problem that in the process of predicting the inclination rate of a push-type rotary steering tool, the influence of the action execution control mode of the push-pull block is not considered, resulting in low prediction accuracy of the inclination rate. The present invention monitors and obtains drilling parameters in real time and performs data analysis, and uses the drilling clearance in the drilling parameters combined with the deflection angle of the drilling stabilization platform to perform real-time working condition analysis to obtain the current drilling inclination rate, and provides guiding compensation actions for the prediction process of the drilling inclination rate. Specifically, the push-pull block actively performs action compensation through the hydraulic actuator component. On the basis of ensuring the normal operation of the steering tool, the key is to avoid the mutual influence and restriction between the drill tool and the well wall during the penetration process, thereby improving the stability and efficiency of the drilling operation and providing effective technical support for the drilling of complex wellbore trajectories. During the process of regulating the coating temperature, the cylinder assembly and the temperature regulating assembly complete real-time hydraulic and temperature regulation based on the temperature data and oil pressure data of the hydraulic oil, and make corresponding guidance actions on 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 can operate stably; and during the operation guidance process, the drilling operator uses the mobile phone terminal to perform real-time display of image analysis to intuitively determine whether the current temperature regulation process meets the drilling requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic cross-sectional view of the present invention; Figure 3 is a cross-sectional view of the hydraulic actuator of the present invention; Figure 4 It is a drilling schematic diagram of the present invention; Figure 5 This is a schematic diagram of the hydraulic execution principle of the present invention; Figure 6 Schematic diagram of the structure of the build rate prediction method of the present invention; Figure 7 This is a system block diagram of the drilling stabilization platform of the present invention; Figure 8 It is a flowchart of the execution control module of the present invention.

[0016] In the figure: 1. Measuring assembly; 2. Drill collar body; 3. Logging assembly; 4. Cylinder assembly; 5. Temperature control assembly; 6. Flexible short section; 7. Stabilizer A; 8. Stabilizer B; 9. Hydraulic actuator assembly; 10. Coupling; 11. Drill bit body; 12. Pushing structure; 121. Inner sliding plate; 122. Guide rod column; 123. Pushing rib; 13. Core shaft; 14. Hydraulic inner cavity; 15. Hydraulic outer cavity; 16. Center hole; 17. Compensating hole; 18. Oil storage hole; 19. Connecting channel A; 20. Connecting channel B; 21. Sub-buckle; 22. Female buckle. DETAILED DESCRIPTION

[0017] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] Example 1: In order to solve the technical problem that the build rate prediction process of a push-type rotary steerable tool does not consider the influence of the control mode of the push block's action execution, resulting in low build rate prediction accuracy, the following technical solution is proposed: Reference Figure 1 - Figure 8 As shown, in this embodiment, the push-pull rotary steering structure based on drilling inclination rate prediction includes a drill collar body 2, a drill bit body 11 and a core shaft 13 provided on the drilling tool. A hydraulic actuator assembly 9 is provided between the drill collar body 2 and the drill bit body 11. The hydraulic actuator assembly 9 is externally connected to a drilling stabilization platform. A measuring assembly 1 and a logging assembly 3 are respectively connected to both sides of the drill collar body 2. A stabilization assembly is provided between the hydraulic actuator assembly 9 and the measuring assembly 1. A cylinder assembly 4 and a flexible short sub 6 connected to the hydraulic actuator assembly 9 are provided between the pair of stabilization assemblies. The hydraulic actuator assembly 9 includes a sleeve sleeved on the outer side of the core shaft 13. A push structure 12 is radially slidably installed in the sleeve. The push structure 12 includes an inner sliding piece 121, a guide rod column 122 and a push rib 123 connected to each other. The sleeve is provided with a hydraulic inner chamber 14 and a hydraulic outer chamber 15 on the inner and outer sides corresponding to the inner sliding piece 121, respectively connected to the oil inlet and outlet ends of the cylinder assembly 4; Reference Figure 2 As shown, the stabilizer assembly includes stabilizer A7 and stabilizer B8. The front and rear ends of stabilizers A7 and B8 are respectively installed with a sub-snap 21 and a female snap 22. Stabilizer A7 is connected to the sleeve and the flexible short section 6 through the sub-snap 21 and the female snap 22, respectively. Stabilizer B8 is connected to the cylinder assembly 4 and the measuring assembly 1 through the sub-snap 21 and the female snap 22, respectively. Reference Figure 3 As shown, the hydraulic inner chamber 14 is connected to a communicating channel A19, the hydraulic outer chamber 15 is connected to a communicating channel B20, the communicating channel A19 is connected to a compensation hole 17 connected to the oil outlet end of the cylinder assembly 4, and the communicating channel B20 is connected to an oil storage hole 18 connected to the oil inlet end of the cylinder assembly 4.

[0019] Structural principle: The offset action direction of the pushing structure 12 is executed in real time through the cylinder assembly 4, and the symmetrically arranged stabilizers A7 and B8 are combined to provide trajectory stability during the drilling process. At the same time, real-time regulation is performed according to the predetermined drilling trajectory to achieve independent pushing force during the drilling process of the drill bit, which can avoid mutual restriction and influence between the drill bit and the well wall during the drilling process.

[0020] Reference Figure 6 and Figure 7 As shown, the drilling stabilization platform is equipped with a built-in control system, which includes a parameter acquisition module, an oil 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 about 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 monitoring module and the hydraulic analysis module. The hydraulic analysis module performs data analysis on the hydraulic oil information and generates normal oil pressure signals and abnormal oil pressure signals; The oil monitoring module can control the drilling stabilization platform to measure the hydraulic oil temperature, obtain hydraulic oil information during the hydraulic oil temperature control process, perform data analysis, generate temperature compliance signals and temperature abnormality signals, and send the temperature compliance signals and temperature abnormality signals to the hydraulic analysis module; The hydraulic analysis module combines and compares the received temperature qualified signal and temperature abnormality signal with the generated oil pressure normal signal and oil pressure abnormality 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 receives the maintenance monitoring signal and generates a normal equipment operation signal, and sends the normal equipment operation signal to the execution control module to predict the drilling inclination rate of the drilling stabilization platform. After receiving the temperature control monitoring signal, the temperature management module performs a graphical analysis and reflects the current abnormality of the drilling stabilization platform based on the analysis results; The execution control process of the hydraulic actuator 9 by the execution control module is as follows: Step 1: After receiving the normal operation signal of the equipment, immediately reverse the operation parameters of the current drilling stabilization platform to retrieve the wellbore size DH, stabilization component size DS, and the center distance between stabilizer A7 and stabilizer B8 during the operation of the drilling stabilization platform. , the distance between stabilizer A7 and the bottom surface of drill body 11 ; Step 2: Construct the slope calculation formula ,in It also indicates the current drilling clearance of the stable drilling platform. is the deflection angle of the current drilling stabilization platform with the flexible short section 6 as the fulcrum. The input parameters are used to obtain the drilling inclination rate of the current drilling stabilization platform, where the drilling inclination rate K is: The larger it is, the larger the K value is; Step 3: Compare and analyze the generated drilling inclination rate K with the system preset inclination rate Ky, and control the sliding position of the push rib 123 of the actuator end of the hydraulic actuator 9 in real time to ensure the safety of the drilling process; The control process is as follows: When K>Ky, it indicates that the current stable drilling unit has exceeded the tilt limit, and a guidance signal is sent to the cylinder assembly 4 in real time. The cylinder assembly 4 immediately pumps hydraulic oil into the communication channel B20 through the oil storage hole 18. The hydraulic oil continues to enter the hydraulic external chamber 15 through the communication channel B20. At this time, under the action of the hydraulic oil, the pushing structure 12 on the side of the tilt limit exceeding the limit moves inward; similarly, the pushing structure 12 on the side not exceeding the tilt limit moves outward until the required inclination rate is met. When K<Ky, it indicates that the current stable drilling unit is not tilted enough, and a guide signal is sent to the cylinder assembly 4 in real time. The cylinder assembly 4 immediately pumps hydraulic oil to the communication channel A19 through the compensation hole 17. The hydraulic oil continues to enter the hydraulic 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 tilt moves outward; similarly, the pushing structure 12 on the side not with insufficient tilt moves outward until the required inclination rate is met. If K=Ky, it means that the current build-up rate of the stable drilling unit meets the requirements and no signal is generated.

[0021] Basic principle: The hydraulic control system based on the push-and-leave type rotary steering structure obtains and analyzes the data through real-time monitoring of drilling parameters. The real-time working condition analysis is carried out based on the drilling clearance in the drilling parameters combined with the deflection angle of the drilling stabilization platform to obtain the current drilling inclination rate, and provide guiding compensation actions for the prediction process of the drilling inclination rate. Specifically, the push-and-leave block actively performs action compensation through the hydraulic actuator. On the basis of ensuring the normal operation of the steering tool with a small diameter structure, the key is to avoid the mutual influence and restriction between the drilling tool and the well wall during the deepening process, thereby improving the stability and efficiency of the drilling operation and providing effective technical support for the drilling of complex wellbore trajectories.

[0022] Embodiment 2: This embodiment uses an additional hydraulic oil temperature control system to perform temperature control on the hydraulic oil in the hydraulic chamber of embodiment 1 to ensure stable operation of the push-type rotary guide structure, including: Reference Figure 1 and Figure 2 As shown, a temperature control component 5 is installed at one end of the oil cylinder assembly 4 close to the flexible short section 6. The temperature control component 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 control is performed by an electric oil temperature controller in the prior art, which specifically includes heating, maintaining, and cooling stages. When the actual temperature is lower than the set value, the thermostat sends a heating signal and controls the heating wire to heat; when the actual temperature approaches or reaches the set value, the thermostat automatically adjusts the heating power to keep the temperature constant; if the temperature exceeds the set value, the cooling system is activated to lower the temperature by circulating cooling water, thus completing the entire temperature control process. Since the temperature control process of the entire temperature control component 5 is based on the synchronous operation during the drilling process and the relevant temperature control principle is a mature technology in the prior art, only the principle is explained here without going into too much detail about the relevant steps; The drill bit body 11 is connected to the hydraulic actuator assembly 9 through the coupling 10. The core shaft 13 is inserted into the middle of the hydraulic actuator assembly 9, the coupling 10, the stabilizing assembly, the flexible sub 6, the 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 center hole 16 is formed in the middle of the core shaft 13 and communicates with the drill bit body 11. The hydraulic analysis module performs data analysis on the pressure value of the compensation hole 17 and the pressure value of 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, and the absolute value of the pressure difference value is compared and analyzed with the 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.

[0023] The process of the oil monitoring module measuring the hydraulic oil temperature is as follows: the oil monitoring module performs data analysis on 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 values ​​of the compensation hole 17 and the oil storage hole 18 is marked as a temperature difference value, and the absolute value of the temperature difference value is compared with a preset temperature difference threshold value. If the absolute value of the temperature difference value is greater than the temperature difference threshold value, a temperature qualified signal is generated; if the absolute value of the temperature difference value is less than the temperature difference threshold value, a temperature abnormality signal is generated. The hydraulic analysis module monitors and analyzes the received temperature compliance signal and temperature abnormality signal along with the generated oil pressure normal signal and oil pressure abnormality signal. The specific analysis process is as follows: If the hydraulic analysis module receives the temperature compliance signal and the oil pressure normal signal, it indicates that the current push-to-pull rotary steering structure is operating normally, and the signal is sent to the temperature management module to generate a maintenance monitoring signal. If the hydraulic analysis module receives the temperature abnormality signal or the oil pressure abnormality signal, it indicates that the current push-to-pull rotary steering structure is operating abnormally, and a temperature control monitoring signal is generated and graphically analyzed. The analysis results are fed back to the drilling operator's mobile terminal to remind the drilling operator to adjust the temperature or replace the hydraulic oil. The graphical analysis process of the hydraulic analysis module after receiving the temperature control monitoring signal is as follows: a curve graph in the first quadrant is drawn with the operating time t of the drilling tool as the horizontal axis and the ratio S of the absolute value of the difference between the temperature value of the compensation hole 17 and the temperature value of the oil storage hole 18 / the oil pressure value of the compensation hole 17 - the absolute value of the oil pressure value of the oil storage hole 18 as the vertical axis. When 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 value of the compensation hole 17 and the temperature value of the oil storage hole 18, the more abnormal the oil temperature of the current equipment operation is; conversely, when the absolute value of the difference between the temperature value of the compensation hole 17 and the temperature value of the oil storage hole 18 is constant, the smaller the absolute value of the oil pressure value of the compensation hole 17 - the oil pressure value of the oil storage hole 18, the poorer the temperature control effect of the current equipment operation is. Based on the above: when the current equipment is in the stage of abnormal oil temperature and pressure regulation, 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 are immediately reversely verified, and the pressure and temperature of the hydraulic oil are regulated until they meet the normal operating standards of the equipment; When analyzing the image: Specifically, the smooth curve of each time point t is drawn within the time Δt and compared with the preset standard curve, the vertical coordinate value of the time point t is obtained and marked as the fluctuation data R, all the fluctuation data are summed up and the average fluctuation data is calculated. , the temperature and pressure fluctuation discrete value WY is obtained through the hydraulic analysis module through the formula calculation, , where n is a positive integer greater than zero; then compare and analyze the temperature and pressure fluctuation discrete value WY and the preset fluctuation discrete threshold WYx. If the temperature and pressure fluctuation discrete value is greater than the preset temperature and pressure fluctuation discrete threshold, it indicates that the current equipment operation is highly abnormal; It should be noted that image analysis is used to reflect the degree of abnormal operation of the current equipment, and reverse deduction is performed based on the degree of abnormal operation of the equipment to obtain the current oil temperature and oil pressure data. Finally, the action guidance of the push-type drilling structure is carried out based on the current oil temperature and oil pressure data, so that the push-type rotary steering structure can operate stably; and during the operation guidance process, the drilling operator's mobile phone terminal is used to perform real-time display of image analysis to intuitively determine whether the current temperature adjustment process meets the drilling requirements.

[0024] Basic Principle: When the hydraulic oil is temperature-regulated, the cylinder assembly and temperature-regulating assembly perform real-time hydraulic and temperature regulation based on the temperature and oil pressure data of the hydraulic oil. The system then provides guidance for the push-to-pull rotary steerable structure based on these data, ensuring stable operation. During operational guidance, the drilling operator uses their mobile phone to perform real-time image analysis and display to intuitively determine whether the current temperature regulation process meets drilling requirements.

[0025] Example 3: This example is combined with Example 1 and Example 2. Figure 8 As shown in the figure, a method for predicting the build-up rate of a push-type rotary steering structure applied to drilling operations comprises the following steps: S1: After receiving the normal operation signal of the equipment, the current operating parameters of the drilling stabilization platform are immediately retrieved in reverse order to obtain the wellbore size DH, stabilization component size DS, and the center distance between stabilizer A7 and stabilizer B8 during the operation of the drilling stabilization platform. , the distance between stabilizer A7 and the bottom surface of drill body 11 ; S2: Construct slope calculation formula ,in It also indicates the current drilling clearance of the stable drilling platform. is the deflection angle of the current drilling stabilization platform with the flexible short section 6 as the fulcrum. The input parameters are used to obtain the drilling inclination rate of the current drilling stabilization platform, where the drilling inclination rate K is: The larger it is, the larger the K value is; S3: Compare and analyze the generated drilling inclination rate K with the system preset inclination rate Ky, and control the sliding position of the pushing rib 123 of the actuator end of the hydraulic actuator 9 in real time to ensure the safety of the drilling process; S4: In the above S3, when K>Ky, it means that the current stable drilling unit has exceeded the inclination limit, and a guide signal is sent to the cylinder assembly 4 in real time. The cylinder assembly 4 immediately pumps the hydraulic oil to the connecting channel B20 through the oil storage hole 18, and the hydraulic oil continues to enter the hydraulic outer chamber 15 through the connecting channel B20. At this time, under the action of the hydraulic oil, the pushing structure 12 on the side of the inclination exceeding the limit moves inward; similarly, the pushing structure 12 not on the side of the inclination exceeding the limit moves outward until it meets the requirement of the inclination rate; when K<Ky, it means that the current The inclination of the stable drilling unit is insufficient, and the guide signal is sent to the cylinder assembly 4 in real time. The cylinder assembly 4 immediately pumps the hydraulic oil to the connecting channel A19 through the compensation hole 17, and the hydraulic oil continues to enter the hydraulic inner cavity 14 through the connecting channel A19. At this time, under the action of the hydraulic oil, the pushing structure 12 on the side of insufficient inclination moves outward; similarly, the pushing structure 12 not on the side of insufficient inclination moves outward and inward until the requirement of the inclination rate is met; if K=Ky, it means that the current inclination rate of the stable drilling unit meets the requirement, and no signal is generated.

[0026] In summary, on the one hand, the offset action direction of the pushing structure 12 is executed in real time through the cylinder assembly 4, and the symmetrically arranged stabilizers A7 and B8 are combined to provide trajectory stability during the drilling process, and at the same time, real-time regulation is performed according to the predetermined drilling trajectory to realize independent provision of pushing force during the drilling process of the drill bit. Specifically, the drilling parameters are monitored and acquired in real time and data analysis is performed, and the drilling clearance in the drilling parameters is combined with the deflection angle of the drilling stabilization platform to perform real-time working condition analysis to obtain the current drilling inclination rate, and provide guiding compensation action for the prediction process of the drilling inclination rate. Specifically, the pushing block actively performs action compensation through the hydraulic actuator. On the basis of ensuring the normal operation of the guide tool with a small diameter structure, the key is to avoid the mutual influence and restriction between the drill bit and the well wall during the deepening process, improve the stability and efficiency of the drilling operation, and provide effective technical support for the drilling of complex wellbore trajectories. On the other hand, during the process of regulating the coating temperature of the hydraulic oil, the cylinder assembly and the temperature regulating assembly complete real-time hydraulic and temperature regulation based on the temperature data and oil pressure data of the hydraulic oil, and combine the temperature data and oil pressure data to make corresponding guidance actions for the operation of the push-type rotary steering structure, so that the push-type rotary steering structure can operate stably. In the process of operation guidance, the drilling operator uses the mobile phone terminal to perform real-time display of image analysis to intuitively obtain whether the current temperature regulation process meets the drilling requirements.

[0027] The above formulas are obtained by collecting a large amount of data and performing software simulation, and a formula close to the actual value is selected. The coefficients in the formula are set by those skilled in the art according to actual conditions. The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, can make equivalent replacements or changes based on the technical solution and inventive concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A push-to-pull rotary steering structure based on drilling inclination rate prediction, comprising a drill collar body (2), a drill bit body (11) and a mandrel (13) arranged on a drilling tool, characterized in that: A hydraulic actuator component (9) is arranged between the drill collar body (2) and the drill bit body (11); the hydraulic actuator component (9) is externally connected to a drilling stabilization platform; a measuring component (1) and a logging component (3) are respectively connected to two sides of the drill collar body (2); a stabilization component is arranged between the hydraulic actuator component (9) and the measuring component (1); and a cylinder component (4) and a flexible short joint (6) connected to the hydraulic actuator component (9) are arranged between a pair of the stabilization components; The hydraulic actuator assembly (9) comprises a sleeve sleeved outside a core shaft (13), a push-pull structure (12) being radially slidably mounted inside the sleeve, the push-pull structure (12) comprising an inner sliding plate (121), a guide rod column (122) and a push-pull rib plate (123) connected to each other, and a hydraulic inner chamber (14) and a hydraulic outer chamber (15) respectively connected to the oil inlet and outlet ends of the oil cylinder assembly (4) are arranged on inner and outer sides of the sleeve corresponding to the inner sliding plate (121).

2. The push-type rotary steering structure based on drilling deflection rate prediction according to claim 1 is characterized in that: The drill bit body (11) is connected to the hydraulic actuator assembly (9) via a coupling (10); the mandrel (13) is inserted into the middle of the hydraulic actuator assembly (9), the coupling (10), the stabilizing assembly, the flexible short joint (6), the 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 center hole (16) communicating with the drill bit body (11) is provided in the middle of the mandrel (13).

3. The push-to-pull rotary steering structure based on drilling inclination rate prediction according to claim 2, characterized in that: The stabilizer assembly comprises a stabilizer A (7) and a stabilizer B (8), wherein a sub-buckle (21) and a female buckle (22) are respectively installed at the front and rear ends of the stabilizer A (7) and the stabilizer B (8), wherein the stabilizer A (7) is connected to the sleeve and the flexible short section (6) through the sub-buckle (21) and the female buckle (22), respectively, and the stabilizer B (8) is connected to the cylinder assembly (4) and the measuring assembly (1) through the sub-buckle (21) and the female buckle (22).

4. The push-to-pull rotary steering structure based on drilling inclination rate prediction according to claim 1, characterized in that: The hydraulic inner cavity (14) is connected to a communication channel A (19), and the hydraulic outer cavity (15) is connected to a communication channel B (20).

5. The push-to-pull rotary steering structure based on drilling inclination rate prediction according to claim 4, characterized in that: The communication channel A (19) is connected to a compensation hole (17) connected to an oil outlet end of the oil cylinder assembly (4), and the communication channel B (20) is connected to an oil storage hole (18) connected to an oil inlet end of the oil cylinder assembly (4).

6. The push-to-pull rotary steering structure based on drilling inclination rate prediction according to claim 3, characterized in that: A temperature regulating component (5) is installed at one end of the oil cylinder component (4) close to the flexible short joint (6), and the temperature regulating component (5) is used to regulate the coating temperature of the oil cylinder component (4), the compensation hole (17), and the oil storage hole (18).

7. The push-to-pull rotary steering structure based on drilling inclination rate prediction according to claim 1, characterized in that: The drilling stabilization platform is built with a control system, which includes a parameter acquisition module, an oil monitoring module, a hydraulic analysis module, an execution control module and a temperature management module that are communicatively connected; The parameter acquisition module is capable of acquiring information about the hydraulic oil in the compensation hole (17) and the oil storage hole (18) to obtain hydraulic oil information, and transmits 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 normal oil pressure signals and abnormal oil pressure signals; The oil monitoring module can control the drilling stabilization platform to measure the hydraulic oil temperature, obtain the hydraulic oil information and perform data analysis during the hydraulic oil temperature control process, 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; The hydraulic analysis module combines and compares the received temperature qualified signal and temperature abnormality signal with the generated oil pressure normal signal and oil pressure abnormality 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 receives the maintenance monitoring signal to generate a normal operation signal of the equipment, and sends the normal operation signal of the equipment to the execution control module to predict the drilling inclination rate of the drilling stable platform. After receiving the temperature control monitoring signal, the temperature management module performs a graphical analysis and reflects the degree of abnormal operation of the current drilling stable platform according to the analysis results.

8. The push-to-pull rotary steering structure based on drilling inclination rate prediction according to claim 7, characterized in that: The execution control process of the hydraulic actuator (9) performed by the execution control module is as follows: Step 1: After receiving the normal operation signal of the equipment, immediately reverse the operation parameters of the current drilling stabilization platform to obtain the wellbore size DH, stabilization component size DS, and the center distance between stabilizer A (7) and stabilizer B (8) during the operation of the drilling stabilization platform. , the distance between the stabilizer A (7) and the bottom surface of the drill body (11) ; Step 2: Construct a calculation formula for the slope rate and obtain the drilling slope rate of the current drilling stable platform; Step 3: Compare and analyze the generated drilling inclination rate with the system preset inclination rate, and control the sliding position of the push rib plate (123) at the execution end of the hydraulic actuator (9) in real time to ensure the safety of the drilling process.

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