Drilling tool face angle measuring device and method

Abstract

The present invention provides a device and method for measuring the tool face angle of a drilling tool, the device comprising an acceleration sensor, a prefilter, a phase-locked loop module and a solution module; the acceleration sensor is used to obtain the acceleration signal of the drilling tool, and is also used to output the acceleration signal to the prefilter; the prefilter is used to filter the acceleration signal to obtain an acceleration denoising signal, and is also used to output the acceleration denoising signal to the phase-locked loop module; the phase-locked loop module is used to generate an oscillation signal based on the rotation speed signal of the drilling tool, obtain a corrected oscillation signal based on the acceleration denoising signal and the oscillation signal, and is also used to output the corrected oscillation signal that meets the preset requirements as a virtual tool face signal of the drilling tool to the solution module; the solution module is used to solve the virtual tool face signal to obtain the tool face angle of the drilling tool. The present invention can solve the technical problem that the existing method is affected by the magnetic interference of the geomagnetic field, resulting in large measurement errors or failure to obtain measurement results.

Description

Technical Field

[0001] The invention relates to the technical field of downhole instruments in the petroleum industry, and in particular to a device and method for measuring a tool face angle of a drilling tool. Background Art

[0002] In the process of development and application of oil drilling technology, special well technologies such as ultra-deep wells, high-difficulty directional wells, cluster wells, horizontal wells, extended-reach wells, multi-bottom wells and three-dimensional multi-target wells have emerged and received widespread attention. In order to drill these high-difficulty complex wells and meet the requirements of geology and reservoir engineering, one of the key technologies is to use various drilling-while-drilling tools or instruments to guide or control the wellbore to drill according to the predetermined wellbore trajectory (geometric guidance) or the predetermined target formation (geological guidance). Drilling-while-drilling technology is the most representative and advanced. It is the research focus and development direction of modern drilling. It is a cutting-edge technology that represents the development of drilling technology towards informatization, intelligence and automation.

[0003] During the operation of downhole drilling instruments, such as the rotary steering tool controlling the direction of the bias force during rotary drilling, or the measurement of azimuth parameters by the logging while drilling instrument, the real-time tool face angle is required as an auxiliary parameter. The main principle of downhole drilling instruments for measurement is to use magnetic field sensors to measure the earth's magnetic field. The magnetic field sensor can be used to measure the tool face angle of downhole drilling tools in real time. However, in some cases, if the measurement point is too close to the drill bit, the magnetic field will be disturbed by the magnetic field of the drill bit, resulting in large measurement errors and even wrong measurement results. In addition, when the downhole drilling tool is nearly parallel to the geomagnetic field, there will be a dead zone and no measurement results can be obtained. Summary of the invention

[0004] The present invention provides a device and method for measuring the tool face angle of a drilling tool, which can solve the technical problem that the existing tool face angle measurement method is affected by the magnetic interference of the geomagnetic field, resulting in large measurement errors or failure to obtain measurement results.

[0005] To solve the above technical problems, according to one aspect of the present invention, a device for measuring the tool face angle of a drilling tool is provided, the device comprising an acceleration sensor, a pre-filter, a phase-locked loop module and a solution module;

[0006] The acceleration sensor is used to obtain the acceleration signal of the drilling tool, and is also used to output the acceleration signal to the pre-filter;

[0007] The pre-filter is used to filter the acceleration signal to obtain an acceleration denoised signal, and is also used to output the acceleration denoised signal to the phase-locked loop module;

[0008] The phase-locked loop module is used to generate an oscillation signal based on the rotation speed signal of the drill, obtain a corrected oscillation signal based on the acceleration denoising signal and the oscillation signal, and output the corrected oscillation signal that meets preset requirements as a virtual tool face signal of the drill to the solution module;

[0009] The solving module is used to solve the virtual tool face signal to obtain the tool face angle of the drilling tool.

[0010] Preferably, the phase-locked loop module includes an oscillator, a phase comparator, a phase-locked filter and a first judgment module;

[0011] The oscillator is used to generate an oscillation signal based on the rotation speed of the drilling tool, and is also used to output the oscillation signal to the phase comparator;

[0012] The phase comparator is used to obtain the phase difference between the acceleration denoising signal and the oscillation signal, and is also used to output the phase difference between the acceleration denoising signal and the oscillation signal to the phase-locked filter;

[0013] The phase-locked filter is used to obtain a phase-locked control signal based on a phase difference between the acceleration denoising signal and the oscillation signal, and is also used to output the phase-locked control signal to the oscillator;

[0014] The oscillator is further used to correct the phase of the oscillation signal based on the phase-locked control signal to obtain a corrected oscillation signal, and is also used to output the corrected oscillation signal to the first judgment module and the phase comparator;

[0015] The first judgment module is used to perform spectrum analysis on the corrected oscillation signal to obtain the bandwidth of the corrected oscillation signal, and is also used to judge whether the bandwidth of the corrected oscillation signal is less than or equal to a preset value;

[0016] When the bandwidth of the corrected oscillation signal is less than or equal to a preset value, the corrected oscillation signal meets the preset requirement, and the oscillator is further used to output the corrected oscillation signal as a virtual tool face signal of the drilling tool to the solution module.

[0017] Preferably, the phase-locked loop module includes an oscillator, a phase comparator, a phase-locked filter and a second judgment module;

[0018] The oscillator is used to generate an oscillation signal based on the rotation speed of the drilling tool, and is also used to output the oscillation signal to the phase comparator;

[0019] The phase comparator is used to obtain the phase difference between the acceleration denoising signal and the oscillation signal, and is also used to output the phase difference between the acceleration denoising signal and the oscillation signal to the phase-locked filter;

[0020] The phase-locked filter is used to obtain a phase-locked control signal based on a phase difference between the acceleration denoising signal and the oscillation signal, and is also used to output the phase-locked control signal to the oscillator and the second judgment module;

[0021] The oscillator is further used to correct the phase of the oscillation signal based on the phase-locked control signal to obtain a corrected oscillation signal, and is also used to output the corrected oscillation signal to the phase comparator;

[0022] The second judgment module is used to judge whether the phase-locked control signal is equal to zero;

[0023] When the phase-locked control signal is equal to zero, the corrected oscillation signal meets the preset requirements, and the oscillator is also used to output the corrected oscillation signal as a virtual tool face signal of the drilling tool to the solution module.

[0024] Preferably, the acceleration denoising signal includes acceleration information caused by the tool face angle and acceleration information caused by vibration rotation.

[0025] Preferably, the corrected oscillation signal that meets preset requirements is a corrected oscillation signal having the same frequency and phase as the acceleration denoised signal.

[0026] According to another aspect of the present invention, a method for measuring a tool face angle of a drilling tool is provided, the method comprising:

[0027] Obtaining the acceleration signal of the drilling tool;

[0028] Filter the acceleration signal to obtain an acceleration denoised signal;

[0029] An oscillation signal is generated based on a rotation speed signal of the drill, a corrected oscillation signal is obtained based on the acceleration denoising signal and the oscillation signal, and the corrected oscillation signal that meets preset requirements is used as a virtual tool face signal of the drill;

[0030] The virtual tool face signal is solved to obtain the tool face angle of the drilling tool.

[0031] Preferably, generating an oscillation signal based on a rotation speed signal of a drill, acquiring a corrected oscillation signal based on an acceleration denoising signal and the oscillation signal, and using the corrected oscillation signal that meets preset requirements as a virtual tool face signal of the drill includes:

[0032] S311, generating an oscillation signal based on a rotation speed signal of the drilling tool;

[0033] S312, obtaining a phase difference between the acceleration denoising signal and the oscillation signal;

[0034] S313, acquiring a phase-locked control signal based on a phase difference between the acceleration denoising signal and the oscillation signal;

[0035] S314, correcting the phase of the oscillation signal based on the phase-locked control signal to obtain a corrected oscillation signal;

[0036] S315. Perform spectrum analysis on the corrected oscillation signal to obtain the bandwidth of the corrected oscillation signal, and determine whether the bandwidth of the corrected oscillation signal is less than or equal to a preset value. If so, determine that the corrected oscillation signal meets the preset requirements, use the corrected oscillation signal as the virtual tool face signal of the drilling tool, and return to S312. Otherwise, determine that the corrected oscillation signal does not meet the preset requirements, and directly return to S312.

[0037] Preferably, generating an oscillation signal based on a rotation speed signal of a drill, acquiring a corrected oscillation signal based on an acceleration denoising signal and the oscillation signal, and using the corrected oscillation signal that meets preset requirements as a virtual tool face signal of the drill includes:

[0038] S321, generating an oscillation signal based on a rotation speed signal of the drilling tool;

[0039] S322, obtaining a phase difference between the acceleration denoising signal and the oscillation signal;

[0040] S323, acquiring a phase-locked control signal based on a phase difference between the acceleration denoising signal and the oscillation signal;

[0041] S324, correcting the phase of the oscillation signal based on the phase-locked control signal to obtain a corrected oscillation signal;

[0042] S325. Determine whether the phase-locked control signal is equal to zero. If so, determine whether the corrected oscillation signal meets the preset requirements, use the corrected oscillation signal as the virtual tool face signal of the drilling tool, and return to S322. Otherwise, determine whether the corrected oscillation signal does not meet the preset requirements, and directly return to S322.

[0043] Preferably, the acceleration denoising signal includes acceleration information caused by the tool face angle and acceleration information caused by vibration rotation.

[0044] Preferably, the corrected oscillation signal that meets preset requirements is a corrected oscillation signal having the same frequency and phase as the acceleration denoised signal.

[0045] The technical solution of the present invention is applied, an acceleration sensor is used to obtain the acceleration signal of the drill tool, a pre-filter is used to filter the acceleration signal, a phase-locked loop module is used to generate an oscillation signal, and the oscillation signal is corrected according to the acceleration denoising signal to obtain a virtual tool face signal of the drill tool, and a solution module is used to solve the virtual tool face signal to obtain the tool face angle of the drill tool. The present invention does not use a magnetic field sensor, but uses the acceleration signal of the acceleration sensor to obtain the tool face angle of the drill tool, which can effectively avoid magnetic interference, and there is no measurement dead zone, thereby improving the measurement accuracy. The present invention can complete the measurement of the dynamic tool face angle under conditions such as magnetic field interference or in the dead zone of magnetic field measurement, and can be applicable to instruments such as rotary steering tools and logging while drilling tools. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The included drawings are used to provide a further understanding of the embodiments of the present invention, which constitute a part of the specification, are used to illustrate the embodiments of the present invention, and together with the text description, explain the principles of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0047] Figure 1 A schematic structural diagram of a dynamic tool face measuring device according to an embodiment of the present invention is shown;

[0048] Figure 2 A schematic structural diagram of a dynamic tool face measuring device provided according to another embodiment of the present invention is shown;

[0049] Figure 3 A flow chart of a dynamic tool face measurement method provided according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0050] It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0052] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0053] The present invention provides a device for measuring the tool face angle of a drilling tool, the device comprising an acceleration sensor, a pre-filter, a phase-locked loop module and a solution module;

[0054] The acceleration sensor is used to obtain the acceleration signal of the drilling tool, and is also used to output the acceleration signal to the pre-filter;

[0055] The pre-filter is used to filter the acceleration signal to obtain an acceleration denoised signal, and is also used to output the acceleration denoised signal to the phase-locked loop module;

[0056] The phase-locked loop module is used to generate an oscillation signal based on the rotation speed signal of the drill, obtain a corrected oscillation signal based on the acceleration denoising signal and the oscillation signal, and output the corrected oscillation signal that meets preset requirements as a virtual tool face signal of the drill to the solution module;

[0057] The solving module is used to solve the virtual tool face signal to obtain the tool face angle of the drilling tool.

[0058] The present invention uses an acceleration sensor to obtain the acceleration signal of the drill tool, uses a pre-filter to filter the acceleration signal, uses a phase-locked loop module to generate an oscillation signal, and corrects the oscillation signal according to the acceleration denoising signal to obtain a virtual tool face signal of the drill tool, and uses a solution module to solve the virtual tool face signal to obtain the tool face angle of the drill tool. The present invention does not use a magnetic field sensor, but uses the acceleration signal of the acceleration sensor to obtain the tool face angle of the drill tool, which can effectively avoid magnetic interference, and there is no measurement dead zone, thereby improving the measurement accuracy. The device of the present invention can complete the measurement of the dynamic tool face angle under conditions such as magnetic field interference or in the dead zone of magnetic field measurement, and can be applicable to instruments such as rotary steering tools and logging while drilling tools.

[0059] In the present invention, the pre-filter can filter out non-signal noise such as electrical noise in the acceleration signal to improve the reliability of subsequent calculation results.

[0060] The acceleration denoising signal output by the pre-filter includes acceleration information caused by the tool face angle and acceleration information caused by vibration rotation.

[0061] In addition, the solving module may solve the virtual tool face signal using a solving method in the prior art.

[0062] like Figure 1 As shown, according to an embodiment of the present invention, the phase-locked loop module includes an oscillator, a phase comparator, a phase-locked filter and a first judgment module;

[0063] The oscillator is used to generate an oscillation signal based on the rotation speed of the drilling tool, and is also used to output the oscillation signal to the phase comparator;

[0064] The phase comparator is used to obtain the phase difference between the acceleration denoising signal and the oscillation signal, and is also used to output the phase difference between the acceleration denoising signal and the oscillation signal to the phase-locked filter;

[0065] The phase-locked filter is used to obtain a phase-locked control signal based on a phase difference between the acceleration denoising signal and the oscillation signal, and is also used to output the phase-locked control signal to the oscillator;

[0066] The oscillator is further used to correct the phase of the oscillation signal based on the phase-locked control signal to obtain a corrected oscillation signal, and is also used to output the corrected oscillation signal to the first judgment module and the phase comparator;

[0067] The first judgment module is used to perform spectrum analysis on the corrected oscillation signal to obtain the bandwidth of the corrected oscillation signal, and is also used to judge whether the bandwidth of the corrected oscillation signal is less than or equal to a preset value;

[0068] When the bandwidth of the corrected oscillation signal is less than or equal to a preset value, the corrected oscillation signal meets the preset requirement, and the oscillator is further used to output the corrected oscillation signal as a virtual tool face signal of the drilling tool to the solution module.

[0069] The oscillator generates an oscillation signal based on the rotation speed signal of the drilling tool, and the phase of the oscillation signal is zero, and the oscillation signal is a periodic pulse sequence, and its period can be adjusted according to the phase-locked control signal output by the phase-locked filter. For example, the oscillation signal can be a standard sine signal.

[0070] In this embodiment, the oscillator can generate a corrected oscillation signal in real time and feed the corrected oscillation signal back to the phase comparator. The phase comparator obtains the phase difference between the new acceleration denoising signal and the corrected oscillation signal in real time. The phase-locked filter generates a new phase-locked control signal in real time and corrects the last corrected oscillation signal to obtain a new corrected oscillation signal to complete the closed-loop negative feedback control of the phase-locked loop module.

[0071] Through the above settings, it is determined whether the corrected oscillation signal meets the preset requirements according to the bandwidth of the corrected oscillation signal, so as to obtain the corrected oscillation signal that meets the preset requirements, that is, the virtual tool face signal of the drilling tool, and then obtain the tool face angle of the drilling tool. At this time, the frequency and phase of the virtual tool face signal of the drilling tool are the same as the acceleration denoising signal.

[0072] like Figure 2 As shown, according to an embodiment of the present invention, the phase-locked loop module includes an oscillator, a phase comparator, a phase-locked filter and a second judgment module;

[0073] The oscillator is used to generate an oscillation signal based on the rotation speed of the drilling tool, and is also used to output the oscillation signal to the phase comparator;

[0074] The phase comparator is used to obtain the phase difference between the acceleration denoising signal and the oscillation signal, and is also used to output the phase difference between the acceleration denoising signal and the oscillation signal to the phase-locked filter;

[0075] The phase-locked filter is used to obtain a phase-locked control signal based on a phase difference between the acceleration denoising signal and the oscillation signal, and is also used to output the phase-locked control signal to the oscillator and the second judgment module;

[0076] The oscillator is further used to correct the phase of the oscillation signal based on the phase-locked control signal to obtain a corrected oscillation signal, and is also used to output the corrected oscillation signal to the phase comparator;

[0077] The second judgment module is used to judge whether the phase-locked control signal is equal to zero;

[0078] When the phase-locked control signal is equal to zero, the corrected oscillation signal meets the preset requirements, and the oscillator is also used to output the corrected oscillation signal as a virtual tool face signal of the drilling tool to the solution module.

[0079] The oscillator generates an oscillation signal based on the rotation speed signal of the drilling tool, and the phase of the oscillation signal is zero, and the oscillation signal is a periodic pulse sequence, and its period can be adjusted according to the phase-locked control signal output by the phase-locked filter. For example, the oscillation signal can be a standard sine signal.

[0080] In this embodiment, the oscillator can generate a corrected oscillation signal in real time and feed the corrected oscillation signal back to the phase comparator. The phase comparator obtains the phase difference between the new acceleration denoising signal and the corrected oscillation signal in real time. The phase-locked filter generates a new phase-locked control signal in real time and corrects the last corrected oscillation signal to obtain a new corrected oscillation signal to complete the closed-loop negative feedback control of the phase-locked loop module.

[0081] Through the above settings, it is determined whether the corrected oscillation signal meets the preset requirements according to the phase-locked control signal, so as to obtain the corrected oscillation signal that meets the preset requirements, that is, the virtual tool face signal of the drill, and then obtain the tool face angle of the drill. At this time, the frequency and phase of the virtual tool face signal of the drill are the same as the acceleration denoising signal.

[0082] In the present invention, the phase comparator, the phase-locked filter and the oscillator can all be implemented in the form of analog chips or digital chips.

[0083] like Figure 3 As shown, the present invention provides a method for measuring a tool face angle of a drilling tool, the method comprising:

[0084] S10, obtaining an acceleration signal of the drilling tool;

[0085] S20, filtering the acceleration signal to obtain an acceleration denoised signal;

[0086] S30, generating an oscillation signal based on the rotation speed signal of the drilling tool, acquiring a corrected oscillation signal based on the acceleration denoising signal and the oscillation signal, and using the corrected oscillation signal that meets preset requirements as a virtual tool face signal of the drilling tool;

[0087] S40, solving the virtual tool face signal to obtain the tool face angle of the drilling tool.

[0088] The present invention does not use a magnetic field sensor, but uses the acceleration signal of the drilling tool to obtain the tool face angle of the drilling tool, which can effectively avoid magnetic interference, and there is no measurement dead zone, thereby improving the measurement accuracy. The method of the present invention can complete the measurement of the dynamic tool face angle under conditions such as magnetic field interference or in the dead zone of magnetic field measurement, and can be applicable to instruments such as rotary steering tools and logging while drilling tools.

[0089] In S20 of the present invention, non-signal noise such as electrical noise in the acceleration signal may be filtered out to improve the reliability of subsequent calculation results.

[0090] The acceleration denoising signal includes acceleration information caused by the tool face angle and acceleration information caused by vibration rotation.

[0091] In S40 of the present invention, the virtual tool face signal may be solved using a solution method in the prior art.

[0092] According to an embodiment of the present invention, generating an oscillation signal based on a rotation speed signal of a drilling tool, acquiring a corrected oscillation signal based on an acceleration denoising signal and the oscillation signal, and using the corrected oscillation signal that meets preset requirements as a virtual tool face signal of the drilling tool includes:

[0093] S311, generating an oscillation signal based on a rotation speed signal of the drilling tool;

[0094] S312, obtaining a phase difference between the acceleration denoising signal and the oscillation signal;

[0095] S313, acquiring a phase-locked control signal based on a phase difference between the acceleration denoising signal and the oscillation signal;

[0096] S314, correcting the phase of the oscillation signal based on the phase-locked control signal to obtain a corrected oscillation signal;

[0097] S315. Perform spectrum analysis on the corrected oscillation signal to obtain the bandwidth of the corrected oscillation signal, and determine whether the bandwidth of the corrected oscillation signal is less than or equal to a preset value. If so, determine that the corrected oscillation signal meets the preset requirements, use the corrected oscillation signal as the virtual tool face signal of the drilling tool, and return to S312. Otherwise, determine that the corrected oscillation signal does not meet the preset requirements, and directly return to S312.

[0098] In S311 of the present invention, the phase of the oscillation signal generated based on the rotation speed signal of the drilling tool is zero, and the oscillation signal is a periodic pulse sequence, and its period can be adjusted according to the phase-locked control signal. For example, the oscillation signal can be a standard sine signal.

[0099] In this embodiment, a corrected oscillation signal can be generated in real time, the phase difference between the new acceleration denoising signal and the corrected oscillation signal can be obtained in real time, a new phase-locked control signal can be generated in real time, and the last corrected oscillation signal can be corrected to obtain a new corrected oscillation signal to complete closed-loop negative feedback control.

[0100] Through the above settings, it is determined whether the corrected oscillation signal meets the preset requirements according to the bandwidth of the corrected oscillation signal, so as to obtain the corrected oscillation signal that meets the preset requirements, that is, the virtual tool face signal of the drilling tool, and then obtain the tool face angle of the drilling tool. At this time, the frequency and phase of the virtual tool face signal of the drilling tool are the same as the acceleration denoising signal.

[0101] According to an embodiment of the present invention, generating an oscillation signal based on a rotation speed signal of a drilling tool, acquiring a corrected oscillation signal based on an acceleration denoising signal and the oscillation signal, and using the corrected oscillation signal that meets preset requirements as a virtual tool face signal of the drilling tool includes:

[0102] S321, generating an oscillation signal based on a rotation speed signal of the drilling tool;

[0103] S322, obtaining a phase difference between the acceleration denoising signal and the oscillation signal;

[0104] S323, acquiring a phase-locked control signal based on a phase difference between the acceleration denoising signal and the oscillation signal;

[0105] S324, correcting the phase of the oscillation signal based on the phase-locked control signal to obtain a corrected oscillation signal;

[0106] S325. Determine whether the phase-locked control signal is equal to zero. If so, determine whether the corrected oscillation signal meets the preset requirements, use the corrected oscillation signal as the virtual tool face signal of the drilling tool, and return to S322. Otherwise, determine whether the corrected oscillation signal does not meet the preset requirements, and directly return to S322.

[0107] In S321 of the present invention, the phase of the oscillation signal generated based on the rotation speed signal of the drilling tool is zero, and the oscillation signal is a periodic pulse sequence, and its period can be adjusted according to the phase-locked control signal. For example, the oscillation signal can be a standard sine signal.

[0108] In this embodiment, a corrected oscillation signal can be generated in real time, the phase difference between the new acceleration denoising signal and the corrected oscillation signal can be obtained in real time, a new phase-locked control signal can be generated in real time, and the last corrected oscillation signal can be corrected to obtain a new corrected oscillation signal to complete closed-loop negative feedback control.

[0109] Through the above settings, it is determined whether the corrected oscillation signal meets the preset requirements according to the phase-locked control signal, so as to obtain the corrected oscillation signal that meets the preset requirements, that is, the virtual tool face signal of the drill, and then obtain the tool face angle of the drill. At this time, the frequency and phase of the virtual tool face signal of the drill are the same as the acceleration denoising signal.

[0110] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0111] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for measuring the tool face angle of a drilling tool, characterized in that: The device comprises an acceleration sensor, a pre-filter, a phase-locked loop module and a solution module; The acceleration sensor is used to obtain the acceleration signal of the drilling tool, and is also used to output the acceleration signal to the pre-filter; The pre-filter is used to filter the acceleration signal to obtain an acceleration denoised signal, and is also used to output the acceleration denoised signal to the phase-locked loop module; The phase-locked loop module is used to generate an oscillation signal based on the rotation speed signal of the drill, obtain a corrected oscillation signal based on the acceleration denoising signal and the oscillation signal, and output the corrected oscillation signal that meets preset requirements as a virtual tool face signal of the drill to the solution module; The solving module is used to solve the virtual tool face signal to obtain the tool face angle of the drilling tool; The phase-locked loop module includes an oscillator, a phase comparator, a phase-locked filter and a first judgment module; The oscillator is used to generate an oscillation signal based on the rotation speed of the drilling tool, and is also used to output the oscillation signal to the phase comparator; The phase comparator is used to obtain the phase difference between the acceleration denoising signal and the oscillation signal, and is also used to output the phase difference between the acceleration denoising signal and the oscillation signal to the phase-locked filter; The phase-locked filter is used to obtain a phase-locked control signal based on a phase difference between the acceleration denoising signal and the oscillation signal, and is also used to output the phase-locked control signal to the oscillator; The oscillator is further used to correct the phase of the oscillation signal based on the phase-locked control signal to obtain a corrected oscillation signal, and is also used to output the corrected oscillation signal to the first judgment module and the phase comparator; The first judgment module is used to perform spectrum analysis on the corrected oscillation signal to obtain the bandwidth of the corrected oscillation signal, and is also used to judge whether the bandwidth of the corrected oscillation signal is less than or equal to a preset value; When the bandwidth of the corrected oscillation signal is less than or equal to a preset value, the corrected oscillation signal meets the preset requirement, and the oscillator is further used to output the corrected oscillation signal as a virtual tool face signal of the drilling tool to the solution module.

2. The device according to claim 1, characterized in that The phase-locked loop module includes an oscillator, a phase comparator, a phase-locked filter and a second judgment module; The oscillator is used to generate an oscillation signal based on the rotation speed of the drilling tool, and is also used to output the oscillation signal to the phase comparator; The phase comparator is used to obtain the phase difference between the acceleration denoising signal and the oscillation signal, and is also used to output the phase difference between the acceleration denoising signal and the oscillation signal to the phase-locked filter; The phase-locked filter is used to obtain a phase-locked control signal based on a phase difference between the acceleration denoising signal and the oscillation signal, and is also used to output the phase-locked control signal to the oscillator and the second judgment module; The oscillator is further used to correct the phase of the oscillation signal based on the phase-locked control signal to obtain a corrected oscillation signal, and is also used to output the corrected oscillation signal to the phase comparator; The second judgment module is used to judge whether the phase-locked control signal is equal to zero; When the phase-locked control signal is equal to zero, the corrected oscillation signal meets the preset requirements, and the oscillator is also used to output the corrected oscillation signal as a virtual tool face signal of the drilling tool to the solution module.

3. The device according to claim 1 or 2, characterized in that: The acceleration denoising signal includes acceleration information caused by the tool face angle and acceleration information caused by vibration rotation.

4. The device according to claim 1 or 2, characterized in that: The corrected oscillation signal that meets the preset requirements is a corrected oscillation signal having the same frequency and phase as the acceleration denoised signal.

5. A method for measuring a tool face angle of a drilling tool, characterized in that: The method comprises: Obtaining the acceleration signal of the drilling tool; Filter the acceleration signal to obtain an acceleration denoised signal; An oscillation signal is generated based on a rotation speed signal of the drill, a corrected oscillation signal is obtained based on the acceleration denoising signal and the oscillation signal, and the corrected oscillation signal that meets preset requirements is used as a virtual tool face signal of the drill; The virtual tool face signal is solved to obtain the tool face angle of the drilling tool; Generating an oscillation signal based on a rotation speed signal of a drilling tool, acquiring a corrected oscillation signal based on an acceleration denoising signal and an oscillation signal, and using the corrected oscillation signal that meets preset requirements as a virtual tool face signal of the drilling tool includes: S311, generating an oscillation signal based on a rotation speed signal of the drilling tool; S312, obtaining a phase difference between the acceleration denoising signal and the oscillation signal; S313, acquiring a phase-locked control signal based on a phase difference between the acceleration denoising signal and the oscillation signal; S314, correcting the phase of the oscillation signal based on the phase-locked control signal to obtain a corrected oscillation signal; S315. Perform spectrum analysis on the corrected oscillation signal to obtain the bandwidth of the corrected oscillation signal, and determine whether the bandwidth of the corrected oscillation signal is less than or equal to a preset value. If so, determine that the corrected oscillation signal meets the preset requirements, use the corrected oscillation signal as the virtual tool face signal of the drilling tool, and return to S312. Otherwise, determine that the corrected oscillation signal does not meet the preset requirements, and directly return to S312.

6. The method according to claim 5, characterized in that Generating an oscillation signal based on a rotation speed signal of a drilling tool, acquiring a corrected oscillation signal based on an acceleration denoising signal and an oscillation signal, and using the corrected oscillation signal that meets preset requirements as a virtual tool face signal of the drilling tool includes: S321, generating an oscillation signal based on a rotation speed signal of the drilling tool; S322, obtaining a phase difference between the acceleration denoising signal and the oscillation signal; S323, acquiring a phase-locked control signal based on a phase difference between the acceleration denoising signal and the oscillation signal; S324, correcting the phase of the oscillation signal based on the phase-locked control signal to obtain a corrected oscillation signal; S325. Determine whether the phase-locked control signal is equal to zero. If so, determine whether the corrected oscillation signal meets the preset requirements, use the corrected oscillation signal as the virtual tool face signal of the drilling tool, and return to S322. Otherwise, determine whether the corrected oscillation signal does not meet the preset requirements, and directly return to S322.

7. The method according to claim 5 or 6, characterized in that: The acceleration denoising signal includes acceleration information caused by the tool face angle and acceleration information caused by vibration rotation.

8. The method according to claim 5 or 6, characterized in that: The corrected oscillation signal that meets the preset requirements is a corrected oscillation signal having the same frequency and phase as the acceleration denoised signal.

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