Drilling tool vibration measuring device and measuring method

Abstract

The invention provides a drilling tool vibration measuring device which comprises a drilling tool body and a stable platform concentrically arranged in the drilling tool body through a support, a first sensor is arranged in the drilling tool body, a second sensor is arranged on the stable platform, and the first sensor is connected with the second sensor. And the stable platform is freely and rotatably connected with the drilling tool body.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of sensing technology, in particular to a drilling tool vibration measuring device and a measuring method. BACKGROUND

[0002] In the process of drilling, dangerous dynamic phenomena such as stick-slip, bouncing and whirling may occur in the drill string, which are important reasons for the failure of drilling tools and even catastrophic failures. Therefore, identifying, understanding and solving the vibration of the drill string are the key to solving the problems related to oil and gas drilling.

[0003] With the gradual application of measurement-while-drilling technology, real-time monitoring of complex vibration of the downhole drill string becomes possible, so that reasonable measures can be taken to reduce or suppress vibration when the drill string is severely vibrating, such as optimizing drilling parameters. By analyzing the mean value, waveform, time domain, frequency domain and probability density of the acceleration measured by the vibration measuring device, the vibration form and state of the drill string can be accurately determined.

[0004] However, due to the large deformation of the drill string, the intermittent contact between the drill string and the well wall, and the complex interaction between the drill bit and the drilled formation, the dynamics of the drill string during drilling has a very strong nonlinearity. In actual drilling, various vibration modes of the drill string are coupled, and the drill string vibration working conditions mainly exhibit bouncing, stick-slip vibration and whirling. Bouncing and stick-slip vibration are mainly formed by coupling of longitudinal vibration and torsional vibration, and whirling is formed by coupling of torsional vibration and lateral vibration.

[0005] Therefore, it is desirable in the art to provide a drilling tool vibration measuring device to realize real-time monitoring of complex vibration of the downhole drill string. SUMMARY

[0006] The purpose of the present application is to provide a drilling tool vibration measuring device which can place a stable platform that does not rotate with the drill tool body at the central axis, and different sensors are arranged on the stable platform and the drill tool body respectively for comparison. In addition, a measuring method is also provided.

[0007] According to a first aspect of the present application, a drilling tool vibration measuring device is provided, comprising a drill tool body, and

[0008] a stable platform concentrically arranged in the drill tool body by a support,

[0009] wherein a first sensor is arranged in the drill tool body, and a second sensor is arranged on the stable platform, and the stable platform is freely rotatably connected with the drill tool body.

[0010] In one embodiment, a mounting body is arranged outside the second sensor.

[0011] In one embodiment, a control module is arranged in the stable platform, the control module comprising a monitoring member for monitoring the deflection state of the stable platform, and a driving member connected with the mounting body,

[0012] The monitoring member is configured to control the driving member to cause the mounting body to rotate reversely when the deflection of the stable platform is monitored, so as to keep the second sensor stationary relative to the earth coordinate system.

[0013] In one embodiment, the stable platform comprises a sealed chamber, and a support rod extending outwardly from both ends of the sealed chamber and rotatably connected with the support frame via a bearing.

[0014] In one embodiment, the mounting body and the control module are both arranged in the sealed chamber.

[0015] In one embodiment, the first sensor and the second sensor are arranged at the same axial height.

[0016] In one embodiment, the monitoring member comprises at least one of an accelerometer and an inertial sensor gyroscope.

[0017] In one embodiment, a plurality of flow channels are arranged at intervals in the circumferential direction of the support frame and allow the drilling fluid to pass through.

[0018] In one embodiment, the drilling tool vibration measurement device further comprises a processor for receiving a first vibration signal from the first sensor and a second vibration signal from the second sensor, respectively, the processor being configured to calculate the rotational angular velocity of the drilling tool body according to the following formula: y1 = a y2 + rω 2 and obtain the rotational angular velocity of the drilling tool body,

[0019] wherein the first vibration signal comprises a x1 , a y1 and a z1 ; the second vibration signal comprises a x2 , a y2 and a z2 ; r is the installation radius of the first sensor; and ω is the rotational angular velocity of the drilling tool body.

[0020] According to a second aspect of the present application, there is provided a method for measuring the rotational velocity of a drilling tool body using a drilling tool vibration measurement device as described above:

[0021] S1, measuring a first vibration signal a x1 and a y1 by the first sensor; and measuring a second vibration signal ax2 and a y1 ;

[0022] S2, receiving the first vibration signal and the second vibration signal through the processor, and obtaining the angular velocity ω of the self-rotation of the drill tool body according to a y1 = a y2 + rω 2 and Thus, the angular velocity ω of the self-rotation of the drill tool body is obtained.

[0023] Compared with the prior art, the present application has the following advantages:

[0024] Firstly, the device can place a stable platform that does not rotate with the drill tool body at the central axis, and different sensors are arranged on the stable platform and the drill tool body respectively for comparison.

[0025] In other words, the drill tool body rotates in the present application, but the stable platform and the second sensor arranged on the stable platform do not rotate, and the acceleration of the axis and the surface of the shell of the drill tool body can be measured simultaneously through the first sensor and the second sensor. Preferably, the first vibration signal is corrected by the second vibration signal, i.e. the first vibration signal minus the second vibration signal, so that the angular velocity and the angular acceleration of the self-rotation of the drill tool body can be clearly separated to reflect the lateral and torsional vibration of the drill tool body.

[0026] Secondly, the lateral acceleration and the axial acceleration of the drill tool body can be reflected through the first vibration signal and the second vibration signal to reflect the lateral vibration and the longitudinal vibration of the drill tool body. In other words, the drill vibration measuring device can collect at least two groups of vibration data, and the lateral vibration, the longitudinal vibration of the drill tool body and the torsional vibration of the shell relative to the axis can be distinguished and identified through the way of separately obtaining the three-axis acceleration of the drill axis and the shell surface. Further, if the lateral vibration of the drill axis and the torsional vibration of the drill shell are collected simultaneously, it can be identified that the drill tool body is in a whirling state.

[0027] Therefore, compared with the prior art, the device can clearly and intuitively analyze the complex coupled vibration signal of the drill tool to ensure the accuracy of the researchers in judging the lateral vibration, torsion, jump drilling, stick-slip and other vibration motion states of the drill tool.

[0028] Thirdly, the axial coordinate (a z1 ) measured by the first vibration signal is different from the axial coordinate (a z2) same, thus, the axial vibration data measured by the first vibration signal and the second vibration signal are consistent. Therefore, when analyzing the first vibration signal and the second vibration signal in time domain, the same axial vibration data of the two can be used for calibration, so that the two vibration signals are aligned, and the processing result of the second vibration signal correcting the first vibration signal is more accurate. BRIEF DESCRIPTION OF DRAWINGS

[0029] The present application will be described in detail below with reference to the drawings, in which:

[0030] Figure 1 FIG. 1 is a schematic view of a drilling tool vibration measuring device according to the present application;

[0031] Figure 2 FIG. 2 is a partial sectional view of the first embodiment of the present application, which schematically shows the first embodiment of the present application; Figure 1

[0032] Figure 3 FIG. 3 schematically shows a second embodiment of the drilling tool vibration measuring device according to the present application.

[0033] In the drawings, the same components are designated by the same reference numerals. The drawings are not drawn according to the actual scale. DETAILED DESCRIPTION

[0034] In order to make the technical solutions and advantages of the present application clearer, the exemplary embodiments of the present application will be described in detail below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, not an exhaustive enumeration of all embodiments. And in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0035] In the description of the present application, it should be understood that the terms "first", "second" are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features.

[0036] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements.

[0037] For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0038] ​The application will be further described below with reference to the drawings.

[0039] Figure 1 A schematic view of the drilling tool vibration measuring device 100 according to the present application;

[0040] The first embodiment of the present application will be described below.

[0041] As shown in Figure 1 , according to the first aspect of the present application, there is provided a drilling tool vibration measuring device 100, which comprises a drilling tool body 11 and a stabilizing platform 12 arranged in the drilling tool body 11. Preferably, the drilling tool body 11 is configured in the form of a hollow sleeve, and the stabilizing platform 12 is arranged concentrically in the drilling tool body 11 through a support 101.

[0042] In the present embodiment, as shown in Figure 1 , a first sensor 21 is arranged in the drilling tool body 11. Preferably, the first sensor 21 is capable of collecting a first vibration signal, i.e. collecting the acceleration condition of the outer shell of the drilling tool body 11.

[0043] In the present embodiment, as shown in Figure 1 , a second sensor 22 is arranged on the stabilizing platform 12. Preferably, the second sensor 22 is capable of collecting a second vibration signal, i.e. collecting the acceleration condition of the axis of the drilling tool body 11.

[0044] In the present embodiment, the stabilizing platform 12 comprises a sealed chamber 121, and a support rod 102 extending outwardly from both ends of the sealed chamber 121. Preferably, the support rod 102 is rotatably connected with the support 101 through a bearing, so that the stabilizing platform 12 is capable of freely rotating relative to the drilling tool body 11.

[0045] In the present application, the stabilizing platform 12 is coaxially arranged with the drilling tool body 11, and the stabilizing platform 12 is rotatably connected with the drilling tool body 11 through the support 101, the support rod 102 and the bearing, in other words, the drilling tool body 11 rotates but the stabilizing platform 12 and the second sensor 22 arranged on the stabilizing platform 12 do not rotate.

[0046] Preferably, the support 101 is provided with two, and a plurality of spaced-apart flow channels 103 are arranged circumferentially on the support 101. In the present application, the drilling fluid is capable of orderly flowing through the flow channels 103. In addition, under the action of the sealed chamber 121, the second sensor 22 is effectively prevented from being in contact with the drilling fluid, so as to further improve the accuracy of the measurement data.

[0047] Preferably, an axial positioning part (not shown) is arranged on the support 101, so that the stabilizing platform 12 can be kept in axial positioning relative to the drill tool body 11. In the present application, the axial positioning part can be a shaft shoulder, a shaft ring or other common axial positioning means.

[0048] In the present application, the first sensor 21 and the second sensor 22 are both three-axis accelerometers, and can measure the acceleration in the axial direction Z, the radial direction Y and the tangential direction X respectively. Therefore, by comparing the first vibration signal and the second vibration signal, the real vibration condition of the drill string drill tool body 11 can be quickly and accurately identified, which will be described below.

[0049] In the present application, the first sensor 21 and the second sensor 22 are at the same height in the axial direction.

[0050] According to the present application, the drill tool vibration measuring device 100 further comprises a processor (not shown). Preferably, the processor is configured to receive the first vibration signal collected by the first sensor 21 and the second vibration signal collected by the second sensor 22 respectively. In the present application, the processor can correct the first vibration signal according to the second vibration signal.

[0051] In the present application, it can be expressed as:

[0052] The first radial acceleration of the first vibration signal: a y1 = a y2 + rω 2 ;

[0053] The first tangential acceleration of the first vibration signal:

[0054] The first axial acceleration of the first vibration signal: a z1 = a z2 .

[0055] Wherein, the first vibration signal includes a x1 , a y1 and a z1 ; the second vibration signal includes a x2 , a y2 and a z2 ; r is the installation radius of the first sensor 21; ω is the rotation angular velocity of the drill tool body 11.

[0056] In the present application, a x2 and a y2 are two orthogonal components of the lateral acceleration, i.e. the axial angular velocity plane component of the drill tool body 11, which can be directly measured by the second sensor 22; a z1 and a z2are two axial accelerations measured by the first sensor 21 and the second sensor 22, and since the stable platform 12 keeps relative fixed with the axis of the drill tool body 11, the two axial accelerations are equal.

[0057] Compared with the prior art, the device can simultaneously measure the axial acceleration of the drill tool body 11 and the acceleration of the outer shell surface, and correct the first vibration signal by the second vibration signal, i.e. subtract the second vibration signal from the first vibration signal, so that the rotation angular velocity and the angular acceleration of the drill tool body 11 can be clearly separated, to further reflect the vibration, torsion and torsional coupling vibration of the drill tool body 11.

[0058] It is worth noting that, during the measurement, the drill tool body 11 rotates but the stable platform 12 and the second sensor 22 arranged on the stable platform 12 do not rotate. Thus, the data obtained by the drill tool vibration measuring device 100 through the processor will be more accurate.

[0059] In addition, the first vibration signal and the second vibration signal can reflect the lateral acceleration and the axial acceleration of the axial center of the drill tool body 11 and the outer shell surface of the drill tool, to reflect the lateral vibration and the torsional vibration of the drill tool body 11. In other words, the drill tool vibration measuring device 100 can acquire at least two groups of vibration data, and separate and identify the lateral vibration, the longitudinal vibration and the torsional vibration of the outer shell relative to the axial center of the drill tool as a whole by separately acquiring the three-axis acceleration of the axial center and the outer shell surface of the drill tool. Further, if the lateral vibration of the axial center of the drill tool and the torsional vibration of the outer shell of the drill tool are acquired at the same time, it can be identified that the drill tool body is in whirling state.

[0060] Therefore, compared with the prior art, the device can clearly and intuitively analyze the complex coupled vibration signal of the drill tool, to ensure the accuracy of the researchers in judging the lateral vibration, the torsion, the jump drilling, the stick-slip and other vibration motion states of the drill tool.

[0061] In addition, since the axial coordinate (a z1 ) measured by the first vibration signal is the same as the axial coordinate (a z2 ) measured by the second vibration signal, the axial vibration data measured by the first vibration signal and the second vibration signal are consistent. Therefore, when the first vibration signal and the second vibration signal are analyzed in the time domain, the same axial vibration data can be used for calibration, so that the two vibration signals are aligned, and the processing result of the second vibration signal correcting the first vibration signal is more accurate.

[0062] In one embodiment, as shown in Figure 1 , a drill bit is connected at the lower end surface of the drill tool body 11.

[0063] In the first embodiment, since the rolling friction of the bearing always exists, the drilling tool body 11 will inevitably drive the stable platform 12 to deflect when rotating. Therefore, the second embodiment is given as follows.

[0064] The second embodiment of the present application is described below, wherein the same parts as the first embodiment will not be repeated.

[0065] In the present embodiment, as shown in Figure 1 The second sensor 22 is externally provided with a mounting body 221, in other words, the second sensor 22 is fixed in the mounting body 221. Preferably, the stable platform 12 is provided with a control module.

[0066] In the present application, the control module comprises a monitoring member and a driving member 104, wherein the monitoring member can be used to directly monitor the deflection state of the stable platform 12 during the measurement process, and the output end of the driving member 104 is connected with the mounting body 221, so that the stable platform 12 can be reasonably adjusted according to the information fed back by the monitoring member, thereby ensuring that the drilling tool body 11 rotates but the stable platform 12 and the second sensor 22 arranged on the stable platform 12 do not rotate.

[0067] In other words, the monitoring member is configured to, when the deflection of the stable platform 12 is monitored, control the driving member to drive the mounting body 221 to realize reverse rotation, so as to ensure that the second sensor 22 can remain relatively stationary relative to the geodetic coordinate system. Preferably, the second sensor 22 remaining relatively stationary relative to the geodetic coordinate system can also be understood as the second sensor 22 remaining relatively stationary relative to the well wall.

[0068] Preferably, the geodetic coordinate system is a coordinate system established with reference to the reference ellipsoid in geodetic surveying, and the position of a ground point is represented by geodetic longitude, geodetic latitude and geodetic height.

[0069] In the present embodiment, the mounting body 221 and the control module are both in the sealed chamber 121, so that they can be effectively prevented from contacting the drilling fluid in the drilling tool body 11, and further prevented from being subjected to the resistance torque generated by the drilling fluid. Preferably, the top of the sealed chamber 121 is provided in a streamlined shape, so as to effectively reduce the impact of the drilling fluid.

[0070] In the present application, the monitoring member comprises but is not limited to an accelerometer, an inertial sensor gyroscope and the like, so as to more easily monitor the deflection of the stable platform 12.

[0071] Figure 2 For Figure 1 the partial sectional view, which schematically shows the third embodiment of the present application.

[0072] In combination Figure 1 and2 The third embodiment of the present application will be introduced, and the repeated parts of the second embodiment will not be described again.

[0073] In the present embodiment, the first sensor 21 is provided with one, and the first sensor 21 is arranged in the drill tool body 11, so that the first vibration signal composed of the acceleration in the axial direction (Z), the radial direction (Y) and the tangential direction (X) can be measured, that is, including a x1 , a y1 and a z1 .

[0074] In the present embodiment, the second sensor 22 is provided with one, and the second sensor 22 is installed at the shaft center of the mounting body 221, so that the second vibration signal composed of the acceleration in the axial direction (Z), the radial direction (Y) and the tangential direction (X) can be measured, that is, including a x2 , a y2 and a z2 .

[0075] In the present embodiment, the present device can measure the acceleration of the shaft center and the surface of the outer shell of the drill tool body 11 at the same time, and correct the first vibration signal by the second vibration signal, that is, the first vibration signal minus the second vibration signal, so that the rotation angular velocity and the angular acceleration of the drill tool body 11 can be clearly separated to reflect the lateral and torsional vibration of the drill tool body 11.

[0076] It is worth noting that in the measurement process of the present application, the drill tool body 11 rotates, but the stable platform 12 and the second sensor 22 arranged on the stable platform 12 do not rotate.

[0077] Figure 3 The fourth embodiment of the drill tool vibration measurement device 100 according to the present application is schematically shown.

[0078] The fourth embodiment of the present application will be introduced in combination with Figure 1 and 3 , and the repeated parts of the second embodiment will not be described again.

[0079] In the present embodiment, the first sensor 21 is provided with multiple, and the first sensor 21 is distributed equidistantly in the circumferential direction in the drill tool body 11, so that multiple groups of first vibration signals composed of the acceleration in the axial direction (Z), the radial direction (Y) and the tangential direction (X) can be measured.

[0080] In the present embodiment, the second sensor 22 is provided with multiple, and the second sensor 22 is distributed equidistantly in the circumferential direction in the mounting body 221. It is easy to understand that the acceleration collected by the multiple second sensors 22 arranged on the stable platform 12 can be calculated by fusion to obtain the second vibration signal reflecting the shaft center motion, which is well known to those skilled in the art.

[0081] Since this embodiment can obtain multiple sets of first vibration signals and second vibration signals, it is easier to perform comparative analysis, thereby improving the accuracy of the processing results of correcting the first vibration signal with the second vibration signal, so as to further ensure that the lateral vibration signal of the drill body 11 can be identified more accurately.

[0082] It is worth noting that during the measurement process, the drill body 11 rotates, but the stabilizing platform 12 and the second sensor 22 mounted on the stabilizing platform 12 do not rotate.

[0083] According to a second aspect of the present invention, a method is provided for measuring the rotational angular velocity of the drill body 11 using a drill vibration measuring device as described above:

[0084] First, the first vibration signal a is measured by the first sensor 21. x1 a y1 and a z1 The second vibration signal a is measured by the second sensor 22. x2 a y2 and a z2 ;

[0085] Then, the processor receives the first vibration signal and the second vibration signal, and according to the physical expression: a y1 =a y2 +rω 2 and Thus, the rotational angular velocity ω of the drill body 11 is obtained.

[0086] Compared to existing technologies, in this device, the drill body 11 rotates while the stabilizing platform 12 and the second sensor 22 mounted on the stabilizing platform 12 do not rotate. Furthermore, the acceleration of the drill body 11's axis and the outer surface can be measured simultaneously by the first sensor 21 and the second sensor 22. The first vibration signal is corrected by the second vibration signal, i.e., the first vibration signal minus the second vibration signal. This allows for a clear separation of the drill body 11's rotational angular velocity and angular acceleration, reflecting the lateral and torsional vibration of the drill body 11.

[0087] Preferably, the first vibration signal and the second vibration signal can reflect the lateral acceleration and axial acceleration of the drill bit body 11, thereby reflecting the lateral and longitudinal vibrations of the drill bit body 11. In other words, the drill bit vibration measuring device 100 can collect at least two sets of vibration data, and by directly acquiring the lateral, longitudinal, and torsional vibration signals separately, it can clearly and intuitively analyze the complex coupled vibration signals of the drill bit, ensuring the accuracy of researchers in judging the vibration motion states of the drill bit, such as lateral vibration, skipping, and sticking.

[0088] Preferably, the first vibration signal comprises a first three-axis acceleration of the outer shell of the drill tool body 11, and the second vibration signal comprises a second three-axis acceleration at the axis center of the drill tool body 11.

[0089] In the present application, the first vibration signal and the second vibration signal are aligned through the z-axis acceleration data. Therefore, when the first vibration signal and the second vibration signal are analyzed in the time domain, the same axial vibration data of the two can be used for calibration, so that the two vibration signals are aligned, and the processing result of the second vibration signal correcting the first vibration signal is accurate.

[0090] Compared with the prior art, the present application has the following advantages:

[0091] Firstly, the device can place the stable platform 12 which does not rotate with the drill tool body 11 at the central axis, and different sensors are arranged on the stable platform 12 and the drill tool body 11 respectively for comparison.

[0092] In other words, in the present application, the drill tool body 11 rotates, but the stable platform 12 and the second sensor 22 arranged on the stable platform 12 do not rotate, and the acceleration of the axis center and the outer shell surface of the drill tool body 11 can be measured simultaneously through the first sensor 21 and the second sensor 22. Preferably, the first vibration signal is corrected by the second vibration signal, i.e. the first vibration signal is subtracted by the second vibration signal, so that the rotational angular velocity and the angular acceleration of the drill tool body 11 can be clearly separated to reflect the lateral and torsional vibration of the drill tool body 11.

[0093] Secondly, the present application can reflect the lateral acceleration and the axial acceleration of the drill tool body 11 through the first vibration signal and the second vibration signal to reflect the lateral vibration and the longitudinal vibration of the drill tool body 11. In other words, the drill vibration measuring device 100 can acquire at least two groups of vibration data, and the lateral vibration, the longitudinal vibration of the drill tool body and the torsional vibration of the outer shell relative to the axis center can be distinguished and separated through the way of separately acquiring the three-axis acceleration of the drill tool axis center and the outer shell surface. Further, if the lateral vibration of the drill tool axis center and the torsional vibration of the drill tool outer shell are acquired simultaneously, it can be identified that the drill tool body is in the whirling state.

[0094] Therefore, compared with the prior art, the device can clearly and intuitively analyze the complex coupled vibration signal of the drill tool to ensure the accuracy of the researchers in judging the lateral vibration, torsion, jump drilling, stick-slip and other vibration motion states of the drill tool.

[0095] Thirdly, the axial coordinate (a z1 ) measured by the first vibration signal is different from the axial coordinate (a z2) same, whereby the axial vibration data measured by the first vibration signal and the second vibration signal are consistent. Therefore, when analyzing the first vibration signal and the second vibration signal in time domain, the same axial vibration data can be used for calibration, so that the two vibration signals are aligned, and the processing result of the second vibration signal correcting the first vibration signal is more accurate.

[0096] The above merely describes the preferred embodiments of the present application, but the protection scope of the present application is not limited thereto. Those skilled in the art can easily make changes or modifications within the scope of the present application, and such changes or modifications shall be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A drill string vibration measuring device, comprising: Drill tool body (11), and A stable platform (12) is concentrically arranged within the drill body (11) via a support (101). The drill bit body (11) is equipped with a first sensor (21) and the stabilizing platform (12) is equipped with a second sensor (22). The stabilizing platform (12) is rotatably connected to the drill bit body (11).

2. The drill vibration measuring device according to claim 1, characterized in that, An mounting body (221) is provided outside the second sensor (22).

3. The drill vibration measuring device according to claim 2, characterized in that, A control module is provided within the stabilizing platform (12). The control module includes a monitoring device for monitoring the deflection state of the stabilizing platform (12) and a drive unit (104) connected to the mounting body (221). The monitoring device is configured to control the drive (104) to cause the mounting body (221) to rotate in the opposite direction when the deflection of the stable platform (12) is detected, thereby making the second sensor (22) stationary relative to the geodetic coordinate system.

4. The drill vibration measuring device according to claim 3, characterized in that, The stabilizing platform (12) includes a sealed chamber (121) and a support rod (102) extending outward from both ends of the sealed chamber (121) and forming a rotatable connection with the bracket (101) via bearings.

5. The drill vibration measuring device according to claim 4, characterized in that, Both the mounting body (221) and the control module are located within the sealed chamber (121).

6. The drill vibration measuring device according to claim 5, characterized in that, The first sensor (21) and the second sensor (22) are at the same height in the axial direction.

7. The drill vibration measuring device according to claim 6, characterized in that, The monitoring device includes at least one of an accelerometer and an inertial sensor gyroscope.

8. The drill vibration measuring device according to any one of claims 4 to 7, characterized in that, The support (101) has a plurality of spaced channels (103) arranged around its circumference to allow drilling fluid to pass through.

9. The drill vibration measuring device according to any one of claims 1 to 7, characterized in that, The drill string vibration measuring device further includes a processor that receives a first vibration signal from the first sensor (21) and a second vibration signal from the second sensor (22), respectively. The processor is configured to calculate according to the formula ay1=ay2+rω. 2 and The rotational angular velocity of the drill body (11) is obtained. Wherein, the first vibration signal includes a x1 a y1 and a z1 The second vibration signal includes a x2 a y1 and a z2 ; r is the installation radius of the first sensor (21); ω is the rotational angular velocity of the drill body (11).

10. A method for measuring the rotational angular velocity of a drill bit body (11) using a drill bit vibration measuring device according to any one of claims 1 to 9: S1. The first vibration signal a is measured by the first sensor (21). x1 a y1 and a z1 The second vibration signal a is measured by the second sensor (22). x2 a y2 and a z2 ; S2. The processor receives the first vibration signal and the second vibration signal, and according to a y1 =a y2 +rω 2 and Thus, the rotational angular velocity ω of the drill body (11) is obtained.

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