Method, device, equipment and storage medium for zero-degree deflection of rotary steering system

Abstract

This article provides a method, device, equipment and storage medium for zero-degree deflection of a rotary steering system, wherein the method includes: determining a standard direction; setting one of the force components as a reference force component, and the other two force components are respectively a first disordered force component and a second disordered force component, and the angle between the reference force component and the standard direction is θ; determining the angle between the reference force component, the first disordered force component and the second disordered force component and the guide resultant force through the angle θ; determining the value range of the reference force component; setting the magnitude of the reference force component according to the value range of the reference force component; determining the magnitude of the first disordered force component and the second disordered force component through the magnitude of the guide resultant force and the set reference force component. The magnitude and direction of the three force components can be determined more accurately in the above manner.

Description

Technical Field

[0001] The present invention relates to the field of drilling deflection, and in particular, to a method, device, equipment and storage medium for zero-degree deflection of a rotary steering system. Background Art

[0002] At present, drilling exploration is mostly required to obtain underground resources. Based on the actual situation, it is necessary to drill inclined wells through inclination tools according to the designed drilling trajectory. When existing tools are used for inclination, most of them use the drill bit to perform asymmetric cutting on the bottom of the well. When the cutting speed on one side of the drill bit is fast and the cutting speed on the other side is slow, the direction of the wellbore will change. The main reasons for the asymmetric cutting of the drill bit are the drill bit, drill string and formation. For the drill bit, taking the eccentric nozzle drill bit as an example, the drill bit has a strong ability to break the bottom rock on one side and a weak ability on the other side, resulting in asymmetric cutting; for the drill string, the drill string close to the drill bit is bent or tilted, causing the drill bit axis to deviate from the wellbore axis, resulting in asymmetric cutting; for the formation, asymmetric cutting is caused by factors such as the anisotropy of the drillability of the formation.

[0003] With the development of drilling exploration technology, the rotary steering system is the fourth generation of inclination tools. Zero-degree inclination through the rotary steering system means that the well inclination angle is zero degrees. In the process of inclination, the direction and magnitude of the guiding force have a crucial influence on the final result of inclination. The push-to-pull rotary steering system is a type of rotary steering system. Its working principle is to adjust the component forces of three hydraulic actuators on the drilling instrument that are evenly distributed at 120° in the plane, thereby providing a guiding force to the drill bit, thereby controlling the trajectory of the wellbore. Therefore, after the required magnitude and direction of the guiding force are determined, determining the magnitude and direction of the component forces of the three hydraulic actuators becomes a key factor affecting the trajectory of the wellbore. In order to improve the accuracy of inclination, a method for zero-degree inclination of a rotary steering system is urgently needed, which can more accurately determine the magnitude and direction of the component forces of the three hydraulic actuators. Summary of the invention

[0004] The purpose of the embodiments of this article is to provide a method for zero-degree deflection of a rotary steering system to more accurately determine the size and direction of the three component forces.

[0005] To achieve the above objectives, on the one hand, an embodiment of the present invention provides a method for zero-degree deflection of a rotary steerable system, the method comprising:

[0006] Determine the standard direction;

[0007] One of the force components is set as a reference force component, and the other two force components are respectively a first disordered force component and a second disordered force component, and the angle between the reference force component and the standard direction is θ;

[0008] Determine the angles between the reference force component, the first disordered force component, the second disordered force component and the guide resultant force through an angle θ;

[0009] Determining a value range of the reference force component;

[0010] According to the value range of the reference force component, the magnitude of the reference force component is set;

[0011] The magnitudes of the first disordered force component and the second disordered force component are determined by the magnitudes of the guiding resultant force and the set reference force component.

[0012] Preferably, determining the magnitudes of the first disordered force component and the second disordered force component by the magnitude of the guiding resultant force and the set reference force component includes:

[0013] The magnitudes of the first disordered force component and the second disordered force component are calculated by the following formula:

[0014] F1sinδ+F2sin(δ-2π / 3)+F3sin(δ-4π / 3)=0;

[0015] F1cosδ+F2cos(δ-2π / 3)+F3cos(δ-4π / 3)=F;

[0016] Among them, F1 is the magnitude of the reference component force, F2 is the magnitude of the first disordered component force, F3 is the magnitude of the second disordered component force, F is the magnitude of the guiding resultant force, and δ is the angle between the reference component force and the guiding resultant force.

[0017] Preferably, it also includes:

[0018] Determine whether the magnitudes of the first disordered force component and the second disordered force component are both within the value range of the reference force component; if the magnitudes of the first disordered force component and / or the second disordered force component are not within the value range of the reference force component, reset the magnitude of the reference force component until the magnitudes of the first disordered force component and / or the second disordered force component are both within the value range of the reference force component.

[0019] Preferably, resetting the magnitude of the reference force component includes:

[0020] The magnitude of the reference force component is re-determined by controlling the step length.

[0021] On the other hand, the embodiment of the present invention provides a zero-degree deflection device for a rotary steering system, comprising a steering system body, a magnetic measuring instrument and a control unit connected to each other;

[0022] The magnetic measuring instrument is arranged at one end of the guide system body close to the drill bit attitude measurement unit, and is used to measure the component of the earth's magnetic field in the radial direction of the guide system body;

[0023] The control unit is used to determine the standard direction according to the component of the earth's magnetic field in the radial direction of the guidance system body, set one of the force components as the reference force component, and the other two force components are respectively the first disordered force component and the second disordered force component, the angle between the reference force component and the standard direction is θ; determine the angle between the reference force component, the first disordered force component and the second disordered force component and the guidance resultant force through the angle θ; determine the value range of the reference force component; set the size of the reference force component according to the value range of the reference force component; determine the sizes of the first disordered force component and the second disordered force component through the guidance resultant force and the set size of the reference force component.

[0024] Preferably, the magnetic measuring instrument is composed of three mutually orthogonal first sensors, second sensors and third sensors;

[0025] The measuring direction of the first sensor is consistent with the axial direction of the guide system body, and is used to locate the measuring directions of the second sensor and the third sensor;

[0026] The measuring directions of the second sensor and the third sensor are both located in the cross-sectional direction of the guidance system body, and are used to measure the components of the earth's magnetic field in the radial direction of the guidance system body to determine the standard direction according to the components.

[0027] Preferably, the control unit determines the standard direction according to the component of the earth's magnetic field in the radial direction of the guidance system body, including calculating the standard direction using the following formula:

[0028]

[0029] Among them, B x is the measurement direction of the second sensor, B y The measurement direction of the third sensor, B ta is the standard direction.

[0030] Preferably, the control unit sets one of the force components as a reference force component, and the other two force components are respectively a first disordered force component and a second disordered force component, and the angle between the reference force component and the standard direction is θ, including:

[0031] The control unit determines an angle φ between a measuring direction of the second sensor and the standard direction; obtains an angle ξ between a measuring direction of the second sensor and the reference force component; and determines the angle θ according to the angle φ and the angle ξ;

[0032] The angle φ between the measuring direction of the second sensor and the standard direction is determined by the following formula:

[0033]

[0034] The angle θ is determined according to the angle φ and the angle ξ, and is determined by the following formula:

[0035] θ=ξ+φ;

[0036] Among them, B x is the measurement direction of the second sensor, B y The measuring direction of the third sensor.

[0037] On the other hand, the embodiments of the present invention further provide a computer device, including a memory, a processor, and a computer program stored in the memory, wherein when the computer program is executed by the processor, the instructions of any one of the above methods are executed.

[0038] On the other hand, the embodiments of the present invention further provide a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor of a computer device, the computer program executes instructions of any one of the above-described methods.

[0039] It can be seen from the technical solutions provided in the above embodiments of this invention that the embodiments of this invention determine the magnitude and direction of the guiding resultant force, and determine the angle between the reference force component, the first disordered force component, and the second disordered force component and the guiding resultant force through the angle θ, thereby determining the directions of the three force components. Then, the magnitude of the reference force component is set, and the magnitudes of the remaining two force components are determined through the magnitudes of the guiding resultant force and the reference force component, and then the magnitudes of the three force components are determined. In this way, the magnitude and direction of the three force components can be accurately determined, thereby improving the inclination accuracy of the rotary steering system.

[0040] In order to make the above and other purposes, features and advantages of this article more obvious and easy to understand, the following specifically cites preferred embodiments and describes them in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of this article or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of this article. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 A schematic flow chart of a method for zero-degree deflection of a rotary steerable system provided in an embodiment of the present invention is shown;

[0043] Figure 2 A schematic diagram showing the decomposition of the components of the earth's magnetic field in the horizontal direction provided by the embodiments of this document is shown;

[0044] Figure 3 A schematic diagram showing the distribution of the reference force component, the first disordered force component, the second disordered force component and the guide resultant force provided in the embodiments of this document is shown;

[0045] Figure 4 A schematic structural diagram of a zero-degree deflection device for a rotary steering system provided in an embodiment of the present invention is shown;

[0046] Figure 5 A schematic diagram of the structure of a computer device provided in an embodiment of this invention is shown.

[0047] Description of the accompanying symbols:

[0048] 100. Magnetic measuring instruments;

[0049] 200. control unit;

[0050] 300, guidance system body;

[0051] 502. Computer equipment;

[0052] 504, processor;

[0053] 506. Memory;

[0054] 508, driving mechanism;

[0055] 510, input / output module;

[0056] 512. Input devices;

[0057] 514. Output device;

[0058] 516. Presentation equipment;

[0059] 518. Graphical user interface;

[0060] 520, network interface;

[0061] 522, communication link;

[0062] 524. Communication bus. DETAILED DESCRIPTION

[0063] The following will be combined with the drawings in the embodiments of this article to clearly and completely describe the technical solutions in the embodiments of this article. Obviously, the described embodiments are only part of the embodiments of this article, not all of the embodiments. Based on the embodiments of this article, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this article.

[0064] With the development of drilling exploration technology, the direction and magnitude of the guiding force in the process of deflection through the rotary steering system have a crucial impact on the final result of deflection. The rotary steering system is equipped with three hydraulic actuators evenly distributed at 120° in the plane. The force components provided by the three hydraulic actuators provide the drill bit with a guiding force, thereby controlling the trajectory of the wellbore. Therefore, after the required magnitude and direction of the guiding force are determined, determining the magnitude and direction of the force components of the three hydraulic actuators becomes a key factor affecting the trajectory of the wellbore.

[0065] In order to improve the accuracy of drilling, an embodiment of the present invention provides a method for zero-degree deflection of a rotary steering system. Figure 1 It is a schematic diagram of the steps of a method for zero-degree inclination of a rotary steering system provided in an embodiment of this article. This specification provides the method operation steps described in the embodiment or flowchart, but may include more or fewer operation steps based on conventional or non-creative labor. The order of steps listed in the embodiment is only one way of executing the order of many steps and does not represent the only execution order. When the system or device product is executed in practice, it can be executed in the order of the method shown in the embodiment or the drawings or in parallel.

[0066] Reference Figure 1 , the method may include the following steps:

[0067] S101: Determine standard direction;

[0068] S102: setting one of the force components as a reference force component, and the other two force components as a first disordered force component and a second disordered force component, respectively, and the angle between the reference force component and the standard direction is θ;

[0069] S103: determining angles between the reference force component, the first disordered force component, the second disordered force component and the guide resultant force through an angle θ;

[0070] S104: Determine a value range of the reference force component;

[0071] S105: setting the magnitude of the reference force component according to the value range of the reference force component;

[0072] S106: Determine the magnitudes of the first disordered force component and the second disordered force component according to the magnitudes of the guiding resultant force and the set reference force component.

[0073] Since the magnitude and direction of the guiding resultant force are known, after determining the angles between the reference force component, the first disordered force component, and the second disordered force component and the guiding resultant force through the angle θ, the directions of the three force components are determined. Then the magnitude of the reference force component is set, and the magnitudes of the remaining two force components are determined through the magnitudes of the guiding resultant force and the reference force component, and then the magnitudes of the three force components are determined. In this way, the magnitude and direction of the three force components can be accurately determined, thereby improving the deflection accuracy of the rotary steering system.

[0074] In some embodiments, the rotary steering system includes a steering system body, a first sensor, a second sensor, a third sensor, and a drilling instrument that are interconnected. The steering system body is in the shape of a rod, and a drill bit attitude measurement unit is provided at one end of the steering system body to obtain the attitude information of the drill bit. The first sensor, the second sensor, and the third sensor are orthogonal to each other and are all connected to one end of the steering system body close to the drill bit attitude measurement unit. In some embodiments, the first sensor, the second sensor, and the third sensor can be fluxgate sensors for measuring the strength of the earth's magnetic field in the corresponding direction. The sensor type is not specifically limited in this article.

[0075] In detail, the method for zero-degree inclination of the rotary steering system described in this embodiment can be run in a remote computer device, or in a control unit installed in the steering system body, which is not limited in this article.

[0076] In some embodiments, the drilling instrument is mounted on the steering system body, and three hydraulic actuators and a drill bit are arranged on the drilling instrument. The three hydraulic actuators are all located on the plane where the cross section of the steering system body is located and are evenly distributed at 120°. The three hydraulic actuators are all used to provide component forces to the drill bit, and the three component forces are combined to form a steering force, thereby controlling the wellbore trajectory.

[0077] In some embodiments, the measuring direction of the first sensor is consistent with the axial direction of the guide system body, which is used to locate the measuring directions of the second sensor and the third sensor. The measuring directions of the second sensor and the third sensor are both located in the cross-sectional direction of the guide system body, which are used to measure the radial component of the earth's magnetic field of the guide system body. When the measuring direction of the first sensor is consistent with the axial direction of the guide system body, the measuring directions of the second sensor and the third sensor are accurately located in the cross-sectional direction of the guide system body.

[0078] Reference Figure 2In some embodiments, in the process of determining the standard direction, since the measurement directions of the second sensor and the third sensor are both located in the cross-sectional direction of the guidance system body, the measurement directions of the second sensor and the third sensor reflect the horizontal component of the earth's magnetic field, which can be expressed by the following formula:

[0079]

[0080] Reference Figure 2 and Figure 3 , in formula (1), B x is the measurement direction of the second sensor, B y The measurement direction of the third sensor, B ta is the component of the earth's magnetic field in the horizontal direction. Since the component of the earth's magnetic field in the horizontal direction is a determined direction, it can be used as the standard direction in the embodiments of this article. The embodiments of this article do not specifically limit the method for determining the standard direction. During drilling, the magnitude of the guiding resultant force and the direction of the component relative to the earth's magnetic field in the horizontal direction are known values, that is, the angle between the guiding resultant force and the standard direction is a known angle β.

[0081] Reference Figure 2 and Figure 3 In some embodiments, in the process of determining the angle θ, for the force components provided by the three hydraulic actuators, one of the force components can be set as the reference force component, and the other two force components are the first disordered force component and the second disordered force component. Since the measuring direction of the second sensor is the determined direction, the relative positions of the second sensor and the third sensor and the three hydraulic actuators are fixed, and therefore, through the installation position of the hydraulic actuator providing the reference force component, the angle between the measuring direction of the second sensor and the reference force component can be determined as a known angle ξ, and through the measuring direction of the second sensor and the measuring direction of the third sensor, the angle between the measuring direction of the second sensor and the standard direction can be determined:

[0082]

[0083] In formula (2), φ is the angle between the measurement direction of the second sensor and the standard direction. The angle θ can be determined by the angle φ and the angle ξ:

[0084] θ=ξ+φ (3)

[0085] Reference Figure 2 and Figure 3In a further embodiment, the angles between the reference force component, the first disordered force component, the second disordered force component and the guide resultant force are determined by the angle θ. Specifically, the angle between the reference force component and the standard direction can be determined by formula (3), and the angle between the guide resultant force and the standard direction is known to be the angle β. Therefore, the angle between the reference force component and the guide resultant force can be determined:

[0086] δ=β-θ (4)

[0087] In formula (4), δ is the angle between the reference force component and the guide resultant force. Since the reference force component, the first disordered force component and the second disordered force component are each at an angle of 120°, the angle between the first disordered force component and the guide resultant force, and the angle between the second disordered force component and the guide resultant force can be further determined by the angle δ.

[0088] In the embodiment of this article, determining the magnitudes of the first disordered force component and the second disordered force component by the magnitudes of the guide resultant force and the set reference force component includes:

[0089] The magnitudes of the first disordered force component and the second disordered force component are calculated by the following formula:

[0090] F1sinδ+F2sin(δ-2π / 3)+F3sin(δ-4π / 3)=0 (5)

[0091] F1cosδ+F2cos(δ-2π / 3)+F3cos(δ-4π / 3)=F (6)

[0092] Among them, F1 is the magnitude of the reference component force, F2 is the magnitude of the first disordered component force, F3 is the magnitude of the second disordered component force, F is the magnitude of the guiding resultant force, and δ is the angle between the reference component force and the guiding resultant force.

[0093] The above equations (5) and (6) can be used to obtain the magnitudes of the first disordered force component F2 and the second disordered force component F3 by using the parallelogram rule.

[0094] In the embodiment of this article, the value range of the reference force component can be determined. Since the three hydraulic actuators are all mechanisms with the same performance, the value range of the reference force component is the value range of the first disordered force component and the second disordered force component. Specifically, the value range of the reference force component is related to the performance of the hydraulic actuator itself and is limited by the output force range of the hydraulic actuator. It is assumed that the value range of the reference force component is [M, N]. In a further embodiment, according to the value range of the reference force component, the magnitude of the reference force component is set to F1, and F1 is within the value range of [M, N].

[0095] In a further embodiment, it is determined whether the magnitudes of the first disordered force component and the second disordered force component are both within the value range of the reference force component. If the magnitudes of the first disordered force component and / or the second disordered force component are not within the value range of the reference force component, the magnitude of the reference force component is re-determined by controlling the step length until the magnitudes of the first disordered force component and / or the second disordered force component are both within the value range of the reference force component. In the embodiments of this article, the control step length can be set according to the control accuracy of the instrument, and this article does not limit the specific value of the control step length.

[0096] Specifically, F1 can be set as the minimum value M, and then F1 and the angle δ can be substituted into the above formulas (5) and (6), and the sizes of F2 and F3 can be further calculated to determine whether F2 and F3 are within the value range [M, N]. If F2 and F3 are within the value range, the sizes and directions of the corresponding F1, F2 and F3 can be determined; if F2 and F3 are not within the value range, then let F1 = F1 + L, where F1 on the right side of the formula is the original reference component size, L is the control step size, and the left side of the formula is the re-determined size of F1. The re-determined size of F1 is still within the value range, and then the sizes of F2 and F3 can be further calculated through the above formulas (5) and (6), and it can be determined whether F2 and F3 are within the value range [M, N]. The above process is repeated until F1, F2 and F3 are all within the value range.

[0097] Alternatively, F1 can be set to the maximum value N, and then F1 and the angle δ can be substituted into the above formulas (5) and (6), and the sizes of F2 and F3 can be further calculated to determine whether F2 and F3 are within the value range [M, N]. If F2 and F3 are within the value range, the sizes and directions of the corresponding F1, F2 and F3 can be determined; if F2 and F3 are not within the value range, then let F1 = F1-L, where F1 on the right side of the formula is the original reference component size, L is the control step size, and the left side of the formula is the re-determined size of F1. The re-determined size of F1 is still within the value range, and then the sizes of F2 and F3 can be further calculated through the above formulas (5) and (6), and it can be determined whether F2 and F3 are within the value range [M, N]. The above process is repeated until F1, F2 and F3 are all within the value range.

[0098] Thus, the magnitude and direction of the reference force component, the first disordered force component and the second disordered force component can be determined.

[0099] Based on the above-mentioned method for creating zero-degree inclination of a rotary steering system, an embodiment of the present invention further provides a device for creating zero-degree inclination of a rotary steering system.

[0100] Reference Figure 4The device includes a guide system body 300, a magnetic measuring instrument 100 and a control unit 200 which are interconnected; the magnetic measuring instrument 100 is arranged at one end of the guide system body 300 close to the drill bit attitude measurement unit, and is used to measure the component of the earth's magnetic field in the radial direction of the guide system body 300.

[0101] The magnetic measuring instrument 100 is composed of three mutually orthogonal first sensors, a second sensor and a third sensor; the measuring direction of the first sensor is consistent with the axial direction of the guidance system body 300, and is used to locate the measuring directions of the second sensor and the third sensor; the measuring directions of the second sensor and the third sensor are both located in the cross-sectional direction of the guidance system body 300, and are used to measure the components of the earth's magnetic field in the radial direction of the guidance system body 300, so as to determine the standard direction according to the components.

[0102] The control unit 200 is used to determine the standard direction according to the component of the earth's magnetic field in the radial direction of the guidance system body 300, set one of the components as the reference component, and the other two components are respectively the first disordered component and the second disordered component, the angle between the reference component and the standard direction is θ; determine the angle between the reference component, the first disordered component and the second disordered component and the guidance resultant force through the angle θ; determine the value range of the reference component; set the size of the reference component according to the value range of the reference component; determine the sizes of the first disordered component and the second disordered component through the guidance resultant force and the set size of the reference component.

[0103] The control unit 200 determines the standard direction according to the component of the earth's magnetic field in the radial direction of the guidance system body 300, including calculating the standard direction using the following formula:

[0104]

[0105] Wherein, Bx is the measurement direction of the second sensor, By is the measurement direction of the third sensor, and B ta is the standard direction.

[0106] The control unit 200 sets one of the force components as a reference force component, and the other two force components are respectively a first disordered force component and a second disordered force component, and the angle between the reference force component and the standard direction is θ, including:

[0107] The control unit 200 determines an angle φ between a measuring direction of the second sensor and the standard direction; obtains an angle ξ between a measuring direction of the second sensor and the reference force component; and determines the angle θ according to the angle φ and the angle ξ;

[0108] The angle φ between the measuring direction of the second sensor and the standard direction is determined by the following formula:

[0109]

[0110] The angle θ is determined according to the angle φ and the angle ξ, and is determined by the following formula:

[0111] θ=ξ+φ。

[0112] In one embodiment of this invention, reference is made to Figure 5 As shown, a computer device 502 is also provided. The computer device 502 may include one or more processors 504, such as one or more central processing units (CPUs) or graphics processing units (GPUs), and each processing unit may implement one or more hardware threads. The computer device 502 may also include any memory 506, which is used to store any kind of information such as code, settings, data, etc. In a specific embodiment, a computer program on the memory 506 and executable on the processor 504, when the computer program is executed by the processor 504, can execute instructions according to the above method. Non-limiting, for example, the memory 506 may include any one or more combinations of the following: any type of RAM, any type of ROM, flash memory device, hard disk, optical disk, etc. More generally, any memory may use any technology to store information. Further, any memory may provide volatile or non-volatile retention of information. Further, any memory may represent a fixed or removable component of the computer device 502. In one case, when the processor 504 executes an associated instruction stored in any memory or combination of memories, the computer device 502 may perform any operation of the associated instruction. The computer device 502 also includes one or more drive mechanisms 508 for interacting with any storage, such as a hard disk drive mechanism, an optical disk drive mechanism, etc.

[0113] The computer device 502 may also include an input / output module 510 (I / O) for receiving various inputs (via input devices 512) and for providing various outputs (via output devices 514). A specific output mechanism may include a presentation device 516 and an associated graphical user interface 518 (GUI). In other embodiments, the input / output module 510 (I / O), input device 512, and output device 514 may not be included, and the computer device 502 may be used as a computer device in a network. The computer device 502 may also include one or more network interfaces 520 for exchanging data with other devices via one or more communication links 522. One or more communication buses 524 couple the components described above together.

[0114] The communication link 522 may be implemented in any manner, for example, through a local area network, a wide area network (e.g., the Internet), a point-to-point connection, etc., or any combination thereof. The communication link 522 may include any combination of hardwired links, wireless links, routers, gateway functions, name servers, etc. governed by any protocol or combination of protocols.

[0115] Corresponds to Figure 1 The method in this article also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the above method are executed.

[0116] The embodiment of the present invention also provides a computer readable instruction, wherein when the processor executes the instruction, the program therein causes the processor to execute the following Figure 1 The method shown.

[0117] It should be understood that in the various embodiments of this document, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this document.

[0118] It should also be understood that in the embodiments of this article, the term "and / or" is only a description of the association relationship of the associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0119] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this article.

[0120] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0121] In the several embodiments provided herein, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of the units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, or can be electrical, mechanical or other forms of connection.

[0122] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiments of this article.

[0123] In addition, each functional unit in each embodiment of this invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit may be implemented in the form of hardware or in the form of software functional unit.

[0124] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this article is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of this article. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0125] Specific embodiments are used in this article to illustrate the principles and implementation methods of this article. The description of the above embodiments is only used to help understand the methods and core ideas of this article. At the same time, for general technicians in this field, according to the ideas of this article, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on this article.

Claims

1. A method for zero-degree deflection of a rotary steerable system, characterized in that: The zero-degree deflection device of the rotary steering system used includes a steering system body, a magnetic measuring instrument and a control unit that are interconnected; The magnetic measuring instrument is arranged at one end of the guide system body close to the drill bit attitude measurement unit, and is used to measure the component of the earth's magnetic field in the radial direction of the guide system body; The control unit is used to determine the standard direction according to the component of the earth's magnetic field in the radial direction of the guidance system body, set one of the components as the reference component, and the other two components are respectively the first disordered component and the second disordered component, and the angle between the reference component and the standard direction is θ; determine the angle between the reference component, the first disordered component, the second disordered component and the guidance resultant force through the angle θ; determine the value range of the reference component; set the magnitude of the reference component according to the value range of the reference component; determine the magnitude of the first disordered component and the second disordered component through the magnitude of the guidance resultant force and the set reference component; the magnitude of the first disordered component and the second disordered component is calculated by the following formula: Wherein, F1 is the magnitude of the reference force component, F2 is the magnitude of the first disordered force component, F3 is the magnitude of the second disordered force component, F is the magnitude of the guiding resultant force, and δ is the angle between the reference force component and the guiding resultant force; Determine whether the magnitudes of the first disordered force component and the second disordered force component are both within the value range of the reference force component; if the magnitudes of the first disordered force component and / or the second disordered force component are not within the value range of the reference force component, reset the magnitude of the reference force component until the magnitudes of the first disordered force component and / or the second disordered force component are both within the value range of the reference force component; and re-determine the magnitude of the reference force component by controlling the step size; The standard direction is calculated using the following formula: Where Bx is the measurement direction of the second sensor, By is the measurement direction of the third sensor, and B ta is the standard direction.

2. The method according to claim 1, characterized in that The magnetic measuring instrument is composed of three mutually orthogonal first sensors, second sensors and third sensors; The measuring direction of the first sensor is consistent with the axial direction of the guide system body, and is used to locate the measuring directions of the second sensor and the third sensor; The measuring directions of the second sensor and the third sensor are both located in the cross-sectional direction of the guidance system body, and are used to measure the components of the earth's magnetic field in the radial direction of the guidance system body to determine the standard direction according to the components.

3. The method according to claim 2, characterized in that The control unit sets one of the force components as a reference force component, and the other two force components are respectively a first disordered force component and a second disordered force component, and the angle between the reference force component and the standard direction is θ, including: The control unit determines an angle φ between a measuring direction of the second sensor and the standard direction; obtains an angle ξ between a measuring direction of the second sensor and the reference force component; and determines the angle θ according to the angle φ and the angle ξ; The angle φ between the measuring direction of the second sensor and the standard direction is determined by the following formula: The angle θ is determined according to the angle φ and the angle ξ, and is determined by the following formula: Wherein, Bx is the measuring direction of the second sensor, and By is the measuring direction of the third sensor.

4. A computer device comprising a memory, a processor, and a computer program stored in the memory, characterized in that: When the computer program is executed by the processor, the computer program executes the instructions of the method according to any one of claims 1 to 3.

5. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor of a computer device, the computer program executes the instructions of the method according to any one of claims 1 to 3.

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