Drill rod stress detection support

By designing a drill pipe stress detection bracket and using a base plate and prestressed stress adjustment assembly to fix the strain gauge on the drill pipe, the normal stress of the drill pipe can be monitored and controlled in real time, solving the problem of the existing technology that cannot detect drill pipe stress in real time, and ensuring the safety and continuity of drilling operations.

CN223400504UActive Publication Date: 2025-09-30SHAANXI YOUHAN MEASUREMENT & CONTROL TECH CO LTD
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Patent Information

Application Number
CN202423024300.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-09
Publication Date
2025-09-30
Estimated Expiration
2034-12-09

AI Technical Summary

Technical Problem

The existing technology lacks effective detection tooling to install the stress gauge on the drill pipe, and cannot detect the normal stress of the drill pipe in real time during the drilling process, resulting in the inability to effectively control the drilling operation of the drill pipe.

Method used

A drill pipe stress detection bracket was designed, which included a base plate, fixings, and prestressing adjustment components. The axial normal stress of the drill pipe was obtained in real time through a strain gauge. The strain gauge was fixed to the drill pipe using the fixings and prestressing adjustment components, and the initial stress value was adjusted to achieve real-time control of drilling operations.

Benefits of technology

Real-time stress monitoring and control of drill pipe drilling operations are achieved to avoid drill pipe breakage and ensure the normal operation of drilling operations.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a drill rod stress detection support which comprises a seat plate, a fixing piece and a prestress adjusting assembly, and one end of the seat plate is provided with a stress groove for containing a stress meter; the fixing piece is arranged on one side of the stress groove close to the seat plate; the prestress adjusting assembly is arranged on the side, away from the fixing piece, of the base plate so as to drive the base plate to move towards the side close to / away from the fixing piece, and the initial stress value of the stressometer in the base plate can be adjusted. When the normal stress in the drilling process of the drill rod is detected, firstly, the seat plate clamped with the stress meter is fixedly installed on the drill rod through the fixing piece so that the stress meter can be tightly attached to the tail of the drill rod, and the initial stress value of the stress meter is adjusted to a preset value through the prestress adjusting assembly; and then drilling construction operation is started, the positive stress of the drill rod in the axial direction is obtained in real time through the stress meter, and when it is detected that the positive stress borne by the drill rod is close to the detection threshold value, the drilling speed is reduced, so that the drilling construction operation of the drill rod is effectively controlled.
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Description

Technical Field

[0001] The utility model relates to the technical field of drill rod stress detection, in particular to a drill rod stress detection bracket. Background Art

[0002] During the drilling phase, the drill bit is transported underground via the drill pipe for mining operations. The drilling depth is often related to the strength of the drill pipe. When the drill bit encounters rock or hard formations during drilling, causing the normal stress on the drill pipe to exceed its limit, maintaining or increasing the drilling speed can easily cause the drill pipe to break, making it impossible to ensure the normal operation of subsequent drilling operations. However, there is currently a lack of effective detection tooling to install strain gauges on the drill pipe to measure the normal stress during drilling in real time. Therefore, it is impossible to effectively control the drilling operation of the drill pipe. Utility Model Content

[0003] In view of this, the purpose of the present invention is to provide a drill pipe stress detection bracket, so that a stress gauge can be installed on the drill pipe to obtain the normal stress borne by the drill pipe during drilling in real time, thereby effectively controlling the drilling operation of the drill pipe.

[0004] A drill pipe stress detection bracket, comprising:

[0005] a base plate having a stress groove at one end for accommodating a strain gauge;

[0006] A fixing member is provided on one side of the stress groove close to the base plate, so as to mount the base plate to the tail end of the drill pipe and obtain the normal stress of the drill pipe along the axial direction through a strain gauge;

[0007] The prestress adjustment component is provided on a side of the seat plate away from the fixing member to drive the seat plate to move toward / away from the fixing member to adjust the initial stress value of the strain gauge in the seat plate.

[0008] Optionally, the fixing member includes:

[0009] a fixing ring, the axis of which is coaxially arranged with the center line of the stress groove;

[0010] Positioning fixtures are provided on the inner side wall of the fixing ring and are provided in at least two groups along the circumferential direction;

[0011] The clamping tooling is arranged on the inner side wall of the fixing ring and at least two groups are arranged along the circumferential direction. The two groups of the clamping tooling are alternately arranged with the two groups of the positioning tooling.

[0012] Optionally, a plurality of groups of positioning fixtures are evenly arranged along the circumference of the fixing ring, and the positioning fixtures have:

[0013] A first clamping plate is provided in the fixing ring, wherein a side of the first clamping plate away from the fixing ring has an arc-shaped contact portion that fits the outer circumference of the drill rod;

[0014] a guide rod, one end of which is connected to a side of the first clamping plate away from the arc-shaped contact portion, and the other end of which passes through the inner side wall of the fixing ring and is provided with a limiting portion, the guide rod being slidably connected to the fixing ring;

[0015] A positioning spring is provided on the outer periphery of the guide rod and is located between the outer periphery of the fixing ring and the limiting portion or between the inner wall of the fixing ring and the first clamping plate.

[0016] Optionally, a guide portion is provided at the bottom of the arc-shaped contact portion, tilted downward.

[0017] Optionally, a plurality of groups of the clamping fixtures are evenly arranged along the circumference of the fixing ring, and the clamping fixtures have:

[0018] a second splint, disposed within the fixing ring;

[0019] A screw rod has one end connected to a side of the second clamping plate close to the fixing ring, and the other end passes through the inner side wall of the fixing ring and is provided with a knob. The screw rod is threadedly connected to the fixing ring.

[0020] Optionally, the prestress adjustment component includes:

[0021] A plurality of pull rods, each of which has one end connected to the fixing member and the other end passing through the seat plate and connected to the support plate, wherein the pull rod is slidably connected to the seat plate;

[0022] a pressure plate, slidably mounted on the pull rod;

[0023] a pressure-adjusting spring, provided on the pull rod, with both ends connected to the opposing surfaces of the pressure plate and the seat plate respectively;

[0024] The pressure-adjusting bolt is rotatably mounted on the support plate, one end of the screw rod of the pressure-adjusting bolt passes through the pressure plate and extends to a side close to the seat plate, and the screw rod of the pressure-adjusting bolt is threadedly connected to the pressure plate.

[0025] Optionally, a rotating portion is provided on the pressure-adjusting bolt, and the rotating portion and a nut of the pressure-adjusting bolt are respectively arranged on opposite sides of the support plate.

[0026] Optionally, the strain gauge is detachably mounted in the stress slot.

[0027] The beneficial effects produced by the utility model include:

[0028] The utility model provides a drill pipe stress detection bracket. When detecting the normal stress of the drill pipe during drilling, the base plate with a strain gauge is first fixed on the drill pipe by a fixing piece so that the strain gauge is close to the tail of the drill pipe, and the initial stress value of the strain gauge is adjusted to a preset value by a prestressing adjustment component; then the drilling operation is started, and the normal stress of the drill pipe along the axial direction is obtained in real time by the strain gauge. When it is detected that the normal stress borne by the drill pipe is close to the detection threshold, the drilling speed is reduced, thereby effectively controlling the drilling operation of the drill pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a structural diagram of a drill pipe stress detection bracket of the utility model;

[0030] Figure 2 For this utility model Figure 1 A transverse cross-sectional view in use;

[0031] Figure 3 For this utility model Figure 1 A longitudinal cross-sectional view in use;

[0032] In the figure: 1. seat plate, 2. stress groove, 3. fixing ring, 4. first clamping plate, 5. arc-shaped contact portion, 6. guide rod, 7. limit portion, 8. positioning spring, 9. guide portion, 10. second clamping plate, 11. screw rod, 12. knob, 13. pull rod, 14. support plate, 15. pressure plate, 16. pressure-adjusting spring, 17. pressure-adjusting bolt, 18. rotating portion, 19. strain gauge, 20. drill rod. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] See also Figure 1-Figure 3As shown, the utility model provides a drill pipe stress detection bracket, including a base plate 1, a fixing part and a prestressed stress adjustment component. One end of the base plate 1 has a stress groove 2 for accommodating a stress gauge 19. The stress gauge 19 is detachably installed in the stress groove 2. For example, by adopting a clamping or screw fixing method, the strain gauge 19 can be easily replaced. The fixing part is arranged on the side of the stress groove 2 close to the base plate 1 to install the base plate 1 to the tail of the drill pipe 20 and obtain the axial positive stress of the drill pipe 20 through the stress gauge 19. The prestressed stress adjustment component is arranged on the side of the base plate 1 away from the fixing part to drive the base plate 1 to move toward / away from the fixing part to adjust the initial stress value of the stress gauge 19 in the base plate 1. Specifically, when detecting the magnitude of the positive stress of the drill rod 20 during the drilling process, the base plate 1 equipped with the strain gauge 19 is first fixed on the drill rod 20 through a fixing part so that the strain gauge 19 is close to the tail of the drill rod 20, and the initial stress value of the strain gauge 19 is adjusted to a preset value through the prestressing adjustment component; then the drilling construction operation is started, and the magnitude of the positive stress of the drill rod 20 along the axial direction is obtained in real time through the strain gauge 19. When it is detected that the magnitude of the positive stress borne by the drill rod 20 is close to the detection threshold, the drilling speed is reduced, thereby effectively controlling the drilling construction operation of the drill rod 20.

[0035] It should be noted that: in this embodiment, the drill pipe stress detection bracket is installed on the driving short section of the drill pipe 20, so that the drilling rig clamps the middle part of the driving short section and drives it to rotate and threadedly connect with the drilling short section of the drill pipe 20, so that a corresponding number of drilling short sections are configured according to drilling requirements and connected to the front end of the driving short section to form the drill pipe 20. At the same time, the drill pipe stress detection bracket is installed on the driving short section, which is convenient for extending / shortening the overall drilling length of the drill pipe 20 without disassembling the drill pipe stress detection bracket, which can reduce installation errors.

[0036] Furthermore, the fixing part includes a fixing ring 3, a positioning tool and a clamping tool, and the axis of the fixing ring 3 is coaxially arranged with the center line of the stress groove 2; the positioning tool is arranged on the inner side wall of the fixing ring 3 and at least two groups are arranged along the circumference, which is used to pass the fixing ring 3 from the tail end of the drill rod 20, so as to perform self-positioning installation of the fixing ring 3 through the two groups of positioning tooling, and ensure that the fixing ring 3 and the drill rod 20 are coaxially arranged; the clamping tool is arranged on the inner side wall of the fixing ring 3 and at least two groups are arranged along the circumference, and the two groups of clamping tooling are alternately arranged with the two groups of positioning tooling, so that after the positioning tooling completes the positioning, the fixing ring 3 is locked on the drill rod 20 by the clamping tooling.

[0037] In the above, multiple groups of positioning tooling are evenly arranged along the circumference of the fixing ring 3, and the positioning tooling includes a first clamping plate 4, a guide rod 6 and a positioning spring 8. The first clamping plate 4 is arranged in the fixing ring 3, and the side of the first clamping plate 4 away from the fixing ring 3 has an arc-shaped contact portion 5 that fits the outer periphery of the drill rod 20; one end of the guide rod 6 is connected to the side of the first clamping plate 4 away from the arc-shaped contact portion 5, and the other end passes through the inner side wall of the fixing ring 3 and is provided with a limiting portion 7, and the guide rod 6 is slidably connected to the fixing ring 3; the positioning spring 8 is arranged on the outer periphery of the guide rod 6, and is located between the outer periphery of the fixing ring 3 and the limiting portion 7 or between the inner wall of the fixing ring 3 and the first clamping plate 4, so that when the fixing ring 3 penetrates the tail of the drill rod 20, the drill rod 20 squeezes the first clamping plate 4 to both sides to compress the positioning spring 8. Under the action of the elastic restoring force of the positioning spring 8, the first clamping plate 4 is held against the outer periphery of the drill rod 20, so that the arc-shaped contact portion 5 is tightly fitted with the drill rod 20, thereby completing the positioning installation of the fixing ring 3. Furthermore, in order to ensure that the drill rod 20 can be smoothly inserted between the two sets of first clamping plates 4 , a guide portion 9 is provided at the bottom of the arc-shaped contact portion 5 , tilted downward, to guide the drill rod 20 for installation.

[0038] In the above, multiple sets of clamping fixtures are evenly arranged along the circumference of the fixing ring 3. The clamping fixtures include a second clamping plate 10 and a screw 11. The second clamping plate 10 is arranged inside the fixing ring 3. One end of the screw 11 is connected to the side of the second clamping plate 10 close to the fixing ring 3, and the other end is provided with a knob 12 that passes through the inner wall of the fixing ring 3. The screw 11 is threadedly connected to the fixing ring 3. The screw 11 is driven to rotate by the knob 12 to push the second clamping plate 10 against the drill rod 20, thereby completing the fixed installation of the fixing ring 3. Specifically, the second clamping plate 10 has the same structure and size as the first clamping plate 4, and the second clamping plate 10 is rotatably connected to the screw 11 to ensure that after the second clamping plate 10 contacts the drill rod 20, the screw 11 can continue to push the second clamping plate 10 to move and clamp the drill rod 20.

[0039] Furthermore, the prestressed pressure adjustment assembly includes a number of pull rods 13, pressure plates 15, pressure-adjusting springs 16 and pressure-adjusting bolts 17. One end of each pull rod 13 is connected to a fixing member, and the other end passes through the seat plate 1 and is connected to a support plate 14. The pull rod 13 is slidingly connected to the seat plate 1; the pressure plate 15 is slidingly installed on the pull rod 13; the pressure-adjusting spring 16 is provided on the pull rod 13, and its two ends are respectively connected to the opposite surfaces of the pressure plate 15 and the seat plate 1; the pressure-adjusting bolt 17 is rotatably installed on the support plate 14, and one end of the screw of the pressure-adjusting bolt 17 passes through the pressure plate 15 and extends to a side close to the seat plate 1, and the screw of the pressure-adjusting bolt 17 is threadedly connected to the pressure plate 15. Specifically, retaining ring 3 is fixedly mounted on drill rod 20. When a preset initial stress value is input to strain gauge 19, the adjusting bolt is rotated, driving pressure plate 15 to compress pressure-adjusting spring 16, thereby pressing seat plate 1 toward the side closest to drill rod 20 until the stress value of strain gauge 19 reaches the preset initial stress value. This facilitates adjusting the detection value of strain gauge 19 according to the degree of wear of drill rod 20. Furthermore, pressure-adjusting bolt 17 is provided with a rotating portion 18. Rotating portion 18 and the nut of pressure-adjusting bolt 17 are respectively disposed on opposite sides of support plate 14 to ensure relative rotation between pressure-adjusting bolt 17 and support plate 14.

Claims

1. A drill pipe stress detection bracket, characterized in that: include: A seat plate (1) having a stress groove (2) at one end for accommodating a stress gauge (19); A fixing member is provided on one side of the stress groove (2) close to the seat plate (1) to mount the seat plate (1) to the tail end of the drill rod (20) and obtain the magnitude of the normal stress of the drill rod (20) along the axial direction through a stress meter (19); A prestress adjustment component is provided on a side of the seat plate (1) away from the fixing member to drive the seat plate (1) to move toward / away from the fixing member to adjust the initial stress value of the stress gauge (19) in the seat plate (1).

2. A drill pipe stress detection bracket according to claim 1, characterized in that: The fixing member includes: A fixing ring (3), the axis of which is coaxially arranged with the center line of the stress groove (2); Positioning fixtures are provided on the inner side wall of the fixing ring (3) and are provided in at least two groups along the circumferential direction; The clamping tooling is arranged on the inner side wall of the fixing ring (3) and at least two groups are arranged along the circumferential direction. The two groups of the clamping tooling are alternately arranged with the two groups of the positioning tooling.

3. The drill pipe stress detection bracket according to claim 2, characterized in that: A plurality of groups of positioning fixtures are evenly arranged along the circumference of the fixing ring (3), and the positioning fixtures have: A first clamping plate (4) is arranged in the fixing ring (3), and a side of the first clamping plate (4) away from the fixing ring (3) has an arc-shaped contact portion (5) that fits the outer periphery of the drill rod (20); A guide rod (6), one end of which is connected to a side of the first clamping plate (4) away from the arc-shaped contact portion (5), and the other end of which passes through the inner side wall of the fixing ring (3) and is provided with a limiting portion (7), and the guide rod (6) is slidably connected to the fixing ring (3); A positioning spring (8) is provided on the outer periphery of the guide rod (6) and is located between the outer periphery of the fixing ring (3) and the limiting portion (7) or between the inner wall of the fixing ring (3) and the first clamping plate (4).

4. The drill pipe stress detection bracket according to claim 3, characterized in that: A guide portion (9) is provided at the bottom of the arc-shaped contact portion (5) slanting downward.

5. The drill pipe stress detection bracket according to claim 2, characterized in that: A plurality of groups of the clamping fixtures are evenly arranged along the circumference of the fixing ring (3), and the clamping fixtures have: A second clamping plate (10) is arranged inside the fixing ring (3); A screw rod (11) has one end connected to a side of the second clamping plate (10) close to the fixing ring (3), and the other end passes through the inner wall of the fixing ring (3) and is provided with a knob (12). The screw rod (11) is threadedly connected to the fixing ring (3).

6. The drill pipe stress detection bracket according to claim 1, characterized in that: The prestressing adjustment component includes: A plurality of pull rods (13), one end of each pull rod (13) is connected to the fixing member, and the other end passes through the seat plate (1) and is connected to a support plate (14), and the pull rod (13) is slidably connected to the seat plate (1); A pressure plate (15) is slidably mounted on the pull rod (13); A pressure regulating spring (16) is provided on the pull rod (13), and its two ends are respectively connected to the opposite surfaces of the pressure plate (15) and the seat plate (1); The pressure regulating bolt (17) is rotatably mounted on the support plate (14), one end of the screw of the pressure regulating bolt (17) passes through the pressure plate (15) and extends to a side close to the seat plate (1), and the screw of the pressure regulating bolt (17) is threadedly connected to the pressure plate (15).

7. The drill pipe stress detection bracket according to claim 6, characterized in that: The pressure-adjusting bolt (17) is provided with a rotating portion (18), and the rotating portion (18) and the nut of the pressure-adjusting bolt (17) are respectively arranged on opposite sides of the support plate (14).

8. The drill pipe stress detection bracket according to claim 1, characterized in that: The stress gauge (19) is detachably mounted in the stress groove (2).