Non-contact rotating shaft offset measuring device

Abstract

The utility model discloses a non-contact rotating shaft offset measuring device, which relates to the technical field of petroleum machinery, is used for detecting the radial offset of a top drive mandrel in a top drive system, and comprises a support, a displacement transmission assembly and a displacement detection assembly, the support is detachably mounted on a top drive back plate of the top drive system; the displacement transmission assembly comprises a mandrel sleeve and a floating ring, the mandrel sleeve sleeves the outer circumference of the to-be-measured section of the top drive mandrel, the floating ring is elastically connected with the support, the floating ring sleeves the outer circumference of the mandrel sleeve, a gap is reserved between the floating ring and the mandrel sleeve, permanent magnets are arranged in the mandrel sleeve and the floating ring, and the magnetic poles of the sides, close to each other, of the mandrel sleeve and the floating ring are the same; the displacement detection assembly is installed on the support and used for detecting the radial offset of the floating ring. By means of the arrangement, the offset can be transmitted through magnetic force, all the components are not in direct contact, the radial offset of the top drive mandrel can be measured, and the service life of the measuring device is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of petroleum machinery, in particular to a non-contact rotating shaft deviation measuring device. Background Art

[0002] In oil and gas drilling operations, especially when drilling with a top drive system, the drill bit not only applies tension and torque to the top drive mandrel, but also applies bending moment to the top drive mandrel due to misalignment of the wellhead or drill jumping. When designing the top drive mandrel, the top drive manufacturer mainly refers to the mechanical model and standard of the faucet. The counter torque and bending moment of the mandrel of the faucet during drilling can be ignored. When drilling with a faucet, the bending moment and torque of the drill bit are basically borne by the turntable and the roller square core. However, the top drive is different. The top drive must withstand the counter torque, and at the same time, due to the constraints of the guide rail, it must also withstand the bending moment imposed by the lateral vibration of the drill bit. In the mandrel design, the top drive manufacturer mainly considers the tension and torque of the mandrel. Ideally, it is not subject to bending moment. However, in reality, the top drive mandrel is subject to the combined effects of bending moment, torque, and tension, which ultimately form alternating stress applied to the rotating top drive mandrel. The magnitude and change of the bending moment it is subjected to can be reflected by the radial offset of the mandrel. Therefore, the bending moment can be calculated by detecting the offset of a specific section of the shaft, and an alarm can be issued for bending moments exceeding the design value. The bending load of the top drive mandrel can be understood in time to avoid mandrel breakage due to mandrel overload or fatigue, which in turn causes drilling accidents such as drilling tools falling into the well.

[0003] Therefore, how to detect the offset of the rotating shaft is a technical problem that technical personnel in this field currently need to solve. Utility Model Content

[0004] The utility model aims to provide a non-contact shaft deviation measuring device which can detect the deviation of the shaft.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A non-contact shaft deviation measuring device for detecting radial deviation of a top drive mandrel in a top drive system, comprising:

[0007] A support, detachably mounted on a top drive back plate of the top drive system;

[0008] The displacement transmission component includes a core shaft sleeve and a floating ring. The core shaft sleeve is sleeved on the outer circumference of the section to be measured of the top drive core shaft. The floating ring is elastically connected to the support. The floating ring is sleeved on the outer circumference of the core shaft sleeve with a gap between the two. Permanent magnets are arranged in the core shaft sleeve and the floating ring, and the magnetic poles of the core shaft sleeve and the floating ring are the same on the side close to each other.

[0009] The displacement detection assembly is installed on the support and is used to detect the radial offset of the floating ring.

[0010] Preferably, the support is a semicircular ring structure, and the axis of the support coincides with the top drive core shaft.

[0011] Preferably, the core sleeve and the floating ring are both hollow annular structures, and a number of permanent magnets are evenly spaced inside the core sleeve and the floating ring. The magnetic poles on the outer circumference of the permanent magnets in the core sleeve are the same as the magnetic poles on the inner circumference of the permanent magnets in the floating ring.

[0012] Preferably, the axes of the core sleeve and the floating ring coincide with the axis of the support.

[0013] Preferably, the floating ring is connected to the inner circumference of the support via a supporting spring, and the supporting spring always keeps the floating ring in a horizontal state.

[0014] Preferably, two groups of support springs are provided, and the two groups of support springs are respectively arranged on the same diameter of the floating ring passing through the axis.

[0015] Preferably, the displacement detection assembly includes three groups of displacement sensors, the displacement sensors are arranged on the support, and the ends of the displacement sensors are provided with sensing rods abutting against the outer circumference of the floating ring.

[0016] Preferably, the three groups of displacement sensors are evenly abutted against the outer circumference of the floating ring.

[0017] Preferably, a level is provided on the upper surface of the floating ring for detecting whether the floating ring is level.

[0018] Preferably, the axial width of the floating ring is smaller than the axial width of the core sleeve.

[0019] Compared with the above-mentioned background technology, the utility model provides a non-contact shaft displacement measuring device for detecting the radial displacement of the top drive core shaft in the top drive system, comprising: a support, a displacement transmission assembly and a displacement detection assembly; the support is detachably mounted on the top drive back plate of the top drive system; the displacement transmission assembly comprises a core shaft sleeve and a floating ring, the core shaft sleeve is sleeved on the outer circumference of the cross section to be measured of the top drive core shaft, the floating ring is elastically connected to the support, the floating ring is sleeved on the outer circumference of the core shaft sleeve, and a gap is left between the two, permanent magnets are arranged in the core shaft sleeve and the floating ring, and the magnetic poles of the side where the core shaft sleeve and the floating ring are close to each other are the same; the displacement detection assembly is mounted on the support, and is used to detect the radial displacement of the floating ring.

[0020] Specifically, the top drive mandrel rotates, which drives the mandrel sleeve to rotate. When the top drive mandrel is radially offset due to misalignment of the wellhead or drilling, the mandrel sleeve will also be offset. Since the same poles of the permanent magnets repel each other, the floating ring will be driven to have the same offset. This offset will be detected by the displacement detection component installed on the support, and then a displacement signal will be generated. In this way, the offset can be transmitted by magnetic force, and there is no direct contact between the components. Not only can the radial offset of the top drive mandrel be measured, but the service life of the measuring device is also greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the structure of the non-contact shaft deviation measuring device provided by the embodiment of the utility model in the installation state;

[0023] Figure 2 This is a schematic structural diagram of a non-contact shaft offset measuring device provided in an embodiment of the utility model.

[0024] in:

[0025] 01-top drive system, 02-top drive mandrel, 03-top drive back plate;

[0026] 100-Non-contact shaft deviation measuring device;

[0027] 110-support, 120-core sleeve, 130-floating ring, 140-permanent magnet, 150-support spring, 160-displacement sensor, 161-sensing rod. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0030] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "radial", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the position or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation of the present invention.

[0031] The utility model aims to provide a non-contact shaft deviation measuring device which can detect the deviation of the shaft.

[0032] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0033] See also Figure 1 and Figure 2 The present embodiment provides a non-contact shaft offset measuring device 100 for detecting the radial offset of a top drive spindle 02 in a top drive system 01, comprising: a support 110, a displacement transmission assembly and a displacement detection assembly; the support 110 is detachably mounted on a top drive back plate 03 of the top drive system 01; the displacement transmission assembly comprises a spindle sleeve 120 and a floating ring 130, the spindle sleeve 120 is sleeved on the outer circumference of a section to be measured of the top drive spindle 02, the floating ring 130 is elastically connected to the support 110, the floating ring 130 is sleeved on the outer circumference of the spindle sleeve 120, and a gap is left between the two, permanent magnets 140 are arranged in both the spindle sleeve 120 and the floating ring 130, and the magnetic poles of the spindle sleeve 120 and the floating ring 130 on the side close to each other are the same; the displacement detection assembly is mounted on the support 110, and is used to detect the radial offset of the floating ring 130.

[0034] Specifically, Figure 1 As shown, in the top drive system 01, the top drive spindle 02 is vertically arranged and supported by the vertically arranged top drive back plate 03. The support 110 is detachably fixedly installed on the side of the top drive back plate 03 facing the top drive spindle 02, and the height of the support 110 can be adjusted according to actual conditions. It is only necessary to set the support 110 at the height of the section to be measured of the top drive spindle 02. In this embodiment, the radial offset of the top drive spindle 02 is transmitted to the displacement detection component through the spindle sleeve 120 and the floating ring 130. Specifically, the spindle sleeve 120 is sleeved on the section to be measured of the top drive spindle 02, and the floating ring 130 is elastically connected to the support 110. The floating ring 130 and the spindle sleeve 120 are located at the same height, and the floating ring 130 is sleeved on the outer periphery of the spindle sleeve 120. Figure 2As shown; it should be noted that permanent magnets 140 are provided inside both, and the permanent magnets 140 in the floating ring 130 facing the outer periphery are the same as the permanent magnets 140 in the core sleeve 120 facing the inner periphery. In this way, the floating ring 130 is separated from the core sleeve 120 under the repulsion of magnetic force, and when the top drive core shaft 02 is radially offset, it will drive the core sleeve 120 to offset the same distance, and the floating ring 130 will also be offset by the same distance under the action of magnetic force. At this time, the displacement detection component installed on the support 110 can obtain the offset of the top drive core shaft 02 by detecting the radial offset of the floating ring 130.

[0035] That is to say, the top drive mandrel 02 rotates, and the mandrel sleeve 120 rotates at the same time. When the top drive mandrel 02 is radially offset due to misalignment of the wellhead or drilling, the mandrel sleeve 120 will also be offset. Since the same poles of the permanent magnet 140 repel each other, the floating ring 130 will be driven to have the same offset. This offset will be detected by the displacement detection component installed on the support 110, and then a displacement signal will be generated. In this way, the offset can be transmitted by magnetic force, and there is no direct contact between the components. Not only can the radial offset of the top drive mandrel 02 be measured, but the service life of the measuring device is also greatly improved.

[0036] Preferably, the support 110 is a semicircular ring structure, and the axis of the support 110 coincides with the top drive core shaft 02.

[0037] It can be understood that the top drive core shaft 02 is a cylindrical structure, and the floating ring 130 and the core shaft sleeve 120 are both annular structures, wherein the support 110 supports the floating ring 130 sleeved on the outer circumference of the core shaft sleeve 120. Therefore, in order to facilitate the installation of the floating ring 130, the support 110 is set to a semi-circular ring structure, so that the floating ring 130 can be installed within the circumference of the support 110, making the overall structure of the non-contact shaft offset measuring device 100 more compact; it should be noted that the inner diameter of the support 110 should be larger than the outer diameter of the floating ring 130, and the axis of the support 110 in the installed state should coincide with the axis of the top drive core shaft 02. This arrangement facilitates the installation of the floating ring 130 and is also beneficial to improving the accuracy of the measurement results.

[0038] Preferably, the core sleeve 120 and the floating ring 130 are both hollow annular structures, and a plurality of permanent magnets 140 are evenly spaced inside the core sleeve 120 and the floating ring 130, and the magnetic poles of the outer circumference of the permanent magnet 140 in the core sleeve 120 are the same as the magnetic poles of the inner circumference of the permanent magnet 140 in the floating ring 130.

[0039] In this embodiment, permanent magnets 140 need to be installed inside the core sleeve 120 and the floating ring 130, so both structures are provided with a hollow circular ring structure, and a number of permanent magnets 140 are evenly and spaced apart inside the core sleeve 120 and the floating ring 130. However, in order to ensure that the core sleeve 120 and the floating ring 130 do not contact each other, the magnetic poles of the permanent magnets 140 in the core sleeve 120 and the floating ring 130 are in opposite directions, that is, the magnetic poles of the permanent magnets 140 in the core sleeve 120 facing the outer circumference are the same as the magnetic poles of the permanent magnets 140 in the floating ring 130 facing the inner circumference, so that the core sleeve 120 and the floating ring 1302 are subject to mutual repulsion. It should be noted that the intervals between the permanent magnets 140 need to be set according to actual conditions, and it is necessary to ensure that the core sleeve 120 can force the floating to produce the same offset in any direction.

[0040] Preferably, the axes of the core sleeve 120 and the floating ring 130 coincide with the axis of the support 110 .

[0041] like Figure 2 As shown, in this embodiment, the centers of the core sleeve 120, the floating ring 130 and the support 110 are on the same vertical line. This arrangement can minimize the error of the measurement result caused by the structural characteristics of the measuring device.

[0042] Preferably, the floating ring 130 is connected to the inner circumference of the support 110 via a support spring 150 , and the support spring 150 always keeps the floating ring 130 in a horizontal state.

[0043] In this embodiment, the floating ring 130 is elastically connected to the inner circumference of the support 110 through the support spring 150. This arrangement allows the floating ring 130 to have a certain amount of floating after being subjected to the repulsive force of the core sleeve 120. It should be noted that under the action of the support spring 150, the floating ring 130 is always in a horizontal state, which can improve the accuracy of the measurement results.

[0044] Preferably, two groups of support springs 150 are provided, and the two groups of support springs 150 are respectively arranged on the same diameter of the floating ring 130 passing through the axis.

[0045] like Figure 2 As shown, in the present embodiment, two groups of support springs 150 are arranged, and each group has two support springs 150. It should be noted that the two groups of support springs 150 need to be connected to the outer circumferences of both ends of a diameter of the floating ring 130. This arrangement can keep the floating ring 130 always in the center of the support 110, so as to facilitate the measurement of the radial offset of the top drive core shaft 02.

[0046] Preferably, the displacement detection assembly includes three groups of displacement sensors 160 . The displacement sensors 160 are disposed on the support 110 , and the ends of the displacement sensors 160 are each provided with a sensing rod 161 that abuts against the outer circumference of the floating ring 130 .

[0047] Specifically, in the present embodiment, three groups of displacement sensors 160 are preferably provided, and the three groups of displacement sensors 160 are all arranged on the support 110. A retractable sensing rod 161 is provided on the side of each group of displacement sensors 160 close to the floating ring 130, and the ends of the sensing rod 161 are all in contact with the outer circumference of the floating ring 130. In this way, when the floating ring 130 is offset, the offset will act on the sensing rod 161, and the sensing rods 161 of the three groups of displacement sensors 160 will extend or retract, thereby generating a displacement signal.

[0048] Of course, the number of displacement sensors 160 can be adjusted according to actual conditions, and is not specifically limited herein, as long as the above purpose can be achieved.

[0049] Preferably, three groups of displacement sensors 160 are evenly abutted against the outer circumference of the floating ring 130 .

[0050] Furthermore, in order to accurately determine the direction of the top drive spindle 02 offset, three groups of displacement sensors 160 are evenly arranged in the manufacturing process, that is, the angle between two adjacent groups of displacement sensors 160 with the axis of the support 110 as the vertex is 120 degrees.

[0051] Preferably, a level is provided on the upper surface of the floating ring 130 to detect whether the floating ring 130 is level.

[0052] It can be understood that by providing a level gauge on the upper surface of the floating ring 130 , the operator can clearly and conveniently determine whether the floating ring 130 remains level, thereby adjusting the measuring device.

[0053] Preferably, the axial width of the floating ring 130 is smaller than the axial width of the core sleeve 120 .

[0054] It can be understood that such an arrangement can increase the radial offset range of measuring the top drive spindle 02, thereby increasing the scope of application of this embodiment.

[0055] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0056] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0057] The above is a detailed introduction to the embodiments provided by the utility model. This article uses specific examples to illustrate the principles and implementation methods of the utility model. The description of the above embodiments is only used to help understand the method and core ideas of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A non-contact shaft deviation measuring device (100) for detecting radial deviation of a top drive core shaft (02) in a top drive system (01), characterized in that: include: A support (110) is detachably mounted on a top drive back plate (03) of the top drive system (01); A displacement transmission component, comprising a core shaft sleeve (120) and a floating ring (130), wherein the core shaft sleeve (120) is sleeved on the outer circumference of the cross section to be measured of the top drive core shaft (02), the floating ring (130) is elastically connected to the support (110), the floating ring (130) is sleeved on the outer circumference of the core shaft sleeve (120), and a gap is left between the two, permanent magnets (140) are provided in both the core shaft sleeve (120) and the floating ring (130), and the magnetic poles of the core shaft sleeve (120) and the floating ring (130) on the side close to each other are the same; A displacement detection component is mounted on the support (110) and is used to detect the radial offset of the floating ring (130).

2. The non-contact shaft deviation measuring device (100) according to claim 1, characterized in that: The support (110) is a semicircular ring structure, and the axis of the support (110) coincides with the top drive core shaft (02).

3. The non-contact shaft deviation measuring device (100) according to claim 2, characterized in that: The core sleeve (120) and the floating ring (130) are both hollow annular structures, and a plurality of permanent magnets (140) are evenly spaced inside the core sleeve (120) and the floating ring (130), and the magnetic poles of the outer circumference of the permanent magnets (140) in the core sleeve (120) are the same as the magnetic poles of the inner circumference of the permanent magnets (140) in the floating ring (130).

4. The non-contact shaft deviation measuring device (100) according to claim 3, characterized in that: The axes of the core sleeve (120) and the floating ring (130) coincide with the axis of the support (110).

5. The non-contact shaft deviation measuring device (100) according to claim 3, characterized in that: The floating ring (130) is connected to the inner circumference of the support (110) via a support spring (150), and the support spring (150) always keeps the floating ring (130) in a horizontal state.

6. The non-contact shaft deviation measuring device (100) according to claim 5, characterized in that: Two groups of the support springs (150) are provided, and the two groups of the support springs (150) are respectively arranged on the same diameter of the floating ring (130) passing through the axis.

7. The non-contact shaft deviation measuring device (100) according to claim 2, characterized in that: The displacement detection assembly comprises three groups of displacement sensors (160), the displacement sensors (160) being arranged on the support (110), and the ends of the displacement sensors (160) are each provided with a sensing rod (161) abutting against the outer circumference of the floating ring (130).

8. The non-contact shaft deviation measuring device (100) according to claim 7, characterized in that: The three groups of displacement sensors (160) are evenly abutted against the outer circumference of the floating ring (130).

9. The non-contact shaft deviation measuring device (100) according to claim 5, characterized in that: A level is provided on the upper surface of the floating ring (130) for detecting whether the floating ring (130) is level.

10. The non-contact shaft deviation measuring device (100) according to claim 1, characterized in that: The axial width of the floating ring (130) is smaller than the axial width of the core shaft sleeve (120).

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