Device and method for accurately and directly measuring hook load of drilling machine

Abstract

The invention discloses a drilling machine hook load accurate direct measuring device which comprises a traveling block, a pair of stress converters are connected below the traveling block, the other ends of the two stress converters are jointly connected with a connecting seat, the other end of the connecting seat is connected with a top drive, a drill column is connected below the top drive, and the stress converters are connected with a signal processor through signal lines. The stress converter is connected with a power supply through a wire, and the output end of the signal processor is connected with a display device through a transmission cable. The invention further discloses a measurement method adopting the device. The method specifically comprises the steps that S1, the traveling block is hung on a derrick through a steel wire rope; s2, the total gravity of the top drive and the drill column directly generates pulling force on a stress converter, and the stress converter deforms; and S3, the four strain gauges deform along with deformation of the stress converter to generate electric signals, the electric signals are processed by a signal processor, and calculated tension data are transmitted to a display device through a transmission cable. The device solves the problem of inaccurate hook load tension measurement in the prior art.

Description

Technical Field

[0001] This invention relates to the field of oil and gas drilling and production equipment technology, specifically to a device for precise direct measurement of drilling rig hook load, and also to a method for measurement using the aforementioned device. Background Technology

[0002] Traditional methods for measuring the traveling block hook load tension in oil drilling rigs employ indirect measurement. This involves using hydraulic sensors to measure changes in hydraulic pressure to indirectly estimate the tension at the dead end of the wire rope, and then converting this to the rope system and traveling block efficiency to calculate the traveling block hook load value. This indirect method is affected by factors such as the efficiency of the traveling block system, the acceleration and deceleration of the traveling block, wire rope deformation and weight changes, and friction losses in the pulley bearings. The readings are subject to errors compared to the actual hook load on the drilling rig and are easily affected by environmental factors, resulting in slow response times and high maintenance costs. Therefore, developing a system that can directly, accurately, and quickly measure the traveling block hook load tension is of great significance for improving the reliability and safety of oil drilling rigs. Summary of the Invention

[0003] The purpose of this invention is to provide a precise and direct measurement device for the hook load of drilling rigs, which solves the problem of inaccurate hook load tension measurement in existing methods.

[0004] Another object of the present invention is to provide a method for measuring using the above-described drilling rig hook load precision direct measuring device.

[0005] The first technical solution adopted in this invention is: a drilling rig hook load precision direct measurement device, including a traveling block, a pair of stress transducers connected to the bottom of the traveling block, a connecting seat connected to the other end of the two stress transducers, a top drive connected to the other end of the connecting seat, a drill string connected to the bottom of the top drive, a signal processor connected to the stress transducer via a signal line, a power supply connected to the stress transducer via a wire, and a display device connected to the output end of the signal processor via a transmission cable.

[0006] The first technical solution of this invention is further characterized by: The tour vehicle includes the tour vehicle body, and a pair of hanging ears are fixed to the bottom of the tour vehicle body. The two hanging ears are symmetrically distributed along the tour vehicle body.

[0007] Each ear includes a first ear plate, an ear plate seat is vertically fixed to the first ear plate, and a second ear plate is vertically fixed to the ear plate seat. Both the first and second ear plates have through holes, and the ear plate seat is fixed to the bottom of the traveling carriage body.

[0008] The stress transducer includes a stress transducer body, which is in the shape of a long plate. The stress transducer body has hanging holes and lifting holes, which are symmetrically distributed along the center of the stress transducer body. Stress deformation blind holes are respectively opened at the center of the two symmetrical surfaces of the stress transducer body. Four patch through holes are opened at the bottom of the stress deformation blind holes, which are evenly distributed along the center of the stress deformation blind holes. An insulating layer is attached to the bottom of each stress deformation blind hole.

[0009] A lug bolt is inserted into the lug hole, and the two ends of the lug bolt are inserted into the through holes on the first lug plate and the second lug plate.

[0010] A first strain gauge, a second strain gauge, a third strain gauge, and a fourth strain gauge are attached to the upper surface of the insulating layer. The first strain gauge, the second strain gauge, the third strain gauge, and the fourth strain gauge are connected end to end by wires. The first strain gauge, the second strain gauge, the third strain gauge, and the fourth strain gauge are aligned with the positions of the corresponding through holes. The first strain gauge and the second strain gauge are also connected to the positive terminal of the power supply by wires, and the third strain gauge and the fourth strain gauge are also connected to the negative terminal of the power supply by wires. The first strain gauge and the fourth strain gauge are also connected to the input terminal of the signal processor by wires, and the second strain gauge and the third strain gauge are also connected to the output terminal of the signal processor by wires.

[0011] A lifting lug bolt is inserted into the lifting lug hole, and the two ends of the lifting lug bolt extending out of the lifting lug hole are connected to a connecting seat.

[0012] The second technical solution adopted in this invention is a method of measurement using a drilling rig hook load precision direct measurement device, which specifically includes the following steps: S1. Suspend the traveling block of the drilling rig with the precision direct measurement device on the derrick using a steel wire rope, and turn on the power; S2, The total weight of the top drive and drill string directly exerts a tensile force on the stress converter, causing the stress converter to deform; S3, the first strain gauge, the second strain gauge, the third strain gauge and the fourth strain gauge deform as the stress converter deforms, generating electrical signals. The electrical signals are connected to the signal processor through wires. After processing the signals, the signal processor transmits the calculated tensile force data to the display device through a transmission cable.

[0013] The beneficial effects of this invention are: The drilling rig hook load precision direct measurement device of the present invention can realize direct measurement of hook load: the stress converter is installed at the position of the main path of the traveling rig lifting, and directly measures the hook load tension at the lower end of the traveling rig, avoiding the systematic errors and environmental interference caused by indirect measurement methods.

[0014] High precision: The measurement accuracy and stability of stress converters for large-volume metal materials are improved by using high-precision, high-sensitivity strain gauges.

[0015] High real-time performance: It accurately and directly measures the tension of the traveling block hook, collects data in real time and transmits it to the signal processor, quickly responds to changes in hook load and reflects them on the display device in a timely manner. The transmission path is short and there is no systematic lag, which meets the real-time requirements of hook load in oil drilling.

[0016] Low maintenance cost: The structure is simple and the transmission path is short, making maintenance convenient. In case of failure, the corresponding module can be replaced as needed, reducing the cost of use and maintenance.

[0017] Highly practical: It has strong anti-interference capabilities, can work stably in harsh environments, is suitable for various types of oil drilling rigs, and has good versatility and market prospects. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the drilling rig hook load precision direct measurement device of the present invention; Figure 2 This is a partial structural diagram of the present invention; Figure 3 This is a schematic diagram of the connection structure of the stress converter, traveling carriage, and connecting seat of the present invention; Figure 4 This is a schematic diagram of the front view structure of the stress converter of the present invention; Figure 5 This is a side view of the stress converter structure of the present invention.

[0019] In the diagram, 1. Traveling carriage, 101. Traveling carriage body, 102. Lug, 1021. First lug plate, 1022. Lug plate seat, 1023. Second lug plate, 2. Stress transducer, 201. Stress transducer body, 202. Lug hole, 203. Lifting lug hole, 204. Stress deformation blind hole, 205. Patch through hole, 206. Lug bolt, 207. Lifting lug bolt, 3. Signal processor, 4. Transmission cable, 5. Display device, 6. Connecting seat, 7. Derrick, 8. Top drive, 9. Drill string, 10. Driller's cabin, 11. Wire rope. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0021] like Figure 1 and Figure 2As shown, this invention provides a precise direct measurement device for drilling rig hook load, including a traveling block 1. A pair of stress transducers 2 are connected to the lower part of the traveling block 1. The other ends of the two stress transducers 2 are connected to a connecting seat 6. The other end of the connecting seat 6 is connected to a top drive 8. A drill string 9 is connected to the lower part of the top drive 8. The stress transducers 2 are connected to a signal processor 3 via signal lines. The stress transducers 2 are connected to a power supply via wires. The output of the signal processor 3 is connected to a display device 5 via a transmission cable 4. The stress transducers 2 are made of high-strength materials and can withstand ultra-large loads of thousands of tons.

[0022] like Figure 1-3 As shown, the traveling carriage 1 includes a traveling carriage body 101. A pair of hanging ears 102 are fixedly connected to the bottom of the traveling carriage body 101, and the two hanging ears 102 are symmetrically distributed along the traveling carriage body 101. Each hanging ear 102 includes a first ear plate 1021, an ear plate seat 1022 is vertically fixedly connected to the first ear plate 1021, and a second ear plate 1023 is vertically fixedly connected to the ear plate seat 1022. Both the first ear plate 1021 and the second ear plate 1023 have through holes. The ear plate seat 1022 is fixedly connected to the bottom of the traveling carriage body 101.

[0023] like Figure 3-5 As shown, the stress converter 2 includes a stress converter body 201, which is elongated. The stress converter body 201 has hanging ear holes 202 and lifting ear holes 203, which are symmetrically distributed along the center of the stress converter body 201. Stress deformation blind holes 204 are respectively formed at the center of two symmetrical surfaces of the stress converter body 201. Four patch through holes 205 are formed at the bottom of each stress deformation blind hole 204, and are evenly distributed along the center of each stress deformation blind hole 204. An insulating layer is attached to the bottom of each stress deformation blind hole 204. Hanging ear bolts 206 are inserted into the hanging ear holes 202, and both ends of the hanging ear bolts 206 pass through through holes in the first ear plate 1021 and the second ear plate 1023.

[0024] A first strain gauge, a second strain gauge, a third strain gauge, and a fourth strain gauge are attached to the upper surface of the insulating layer. The first strain gauge, the second strain gauge, the third strain gauge, and the fourth strain gauge are connected end to end by wires. The first strain gauge, the second strain gauge, the third strain gauge, and the fourth strain gauge are aligned with the corresponding through holes 205. The first strain gauge and the second strain gauge are also connected to the positive terminal of the power supply by wires, and the third strain gauge and the fourth strain gauge are also connected to the negative terminal of the power supply by wires. The first strain gauge and the fourth strain gauge are also connected to the input terminal of the signal processor 3 by wires, and the second strain gauge and the third strain gauge are also connected to the output terminal of the signal processor 3 by wires. The signal processor 3 receives the electrical signals output by the four strain gauges, integrates, conditions, amplifies, filters, and linearizes them to improve the signal quality and stability, and converts the processed signals into a standard output signal. The four strain gauges are high-precision, high-sensitivity encapsulated strain gauges, which meet the requirements of wide range and high precision measurement. The two stress transducers 2 are installed between the lug 102 and the connecting seat 6 at the bottom of the traveling carriage 1. They can sense the change of the tension of the traveling carriage hook in real time and convert the tension change into an electrical signal output.

[0025] A lifting bolt 207 is inserted into the lifting lug hole 203, and the two ends of the lifting bolt 207 extending out of the lifting lug hole 203 are connected to the connecting seat 6.

[0026] The method of measuring using a precise direct measuring device for drilling rig hook load specifically includes the following steps: S1. Suspend the traveling block 1 of the drilling rig hook-loaded precision direct measurement device on the derrick 7 via steel wire rope 11, and turn on the power; S2, the total gravity of the top drive 8 and the drill string 9 directly exerts a tensile force on the stress converter 2, causing the stress converter 2 to deform. S3, the first strain gauge, the second strain gauge, the third strain gauge, and the fourth strain gauge deform as the stress converter 2 deforms, generating electrical signals. These electrical signals are connected to the signal processor 3 via wires. After processing the signals, the signal processor transmits the calculated tension data to the display device 5 via the transmission cable 4. The display device 5 receives the standard signal output by the signal processor 3 and displays it as the hook load tension value or inputs it into the electronic dial of the integrated system screen, allowing the driller to intuitively understand the real-time changes in the hook load tension of the traveling block.

[0027] The working principle of the drilling rig hook load precision direct measurement device provided by this invention is as follows: The stress converter 2 is made of high-strength material and internally encapsulates high-precision, high-sensitivity strain gauges. It also contains signal line channels and is equipped with signal lines. The weight of the system consisting of the top drive 8 and the drill string 9 is applied to the stress converter 2. The stress change on the stress converter 2 is converted into an electrical signal and transmitted to the signal processor 3 via wires. The signal processor 3 processes, integrates, conditions, and amplifies the signal from the stress converter 2, and converts the processed signal into a standard output signal. The signal is transmitted via the transmission cable 4 to the display device 5 in the driller's cabin 10 for display. Simultaneously, the display device 5 can also output signals to other display screen systems in the driller's cabin.

[0028] At the same time, the driller's cabin 10 transmits power to the stress converter 2 via wires.

[0029] The stress transducer 2 has a long plate structure. The measuring circuit consists of a Wheatstone bridge composed of a first strain gauge, a second strain gauge, a third strain gauge, and a fourth strain gauge, and is fabricated inside the stress deformation blind hole 204 to prevent external adverse influences such as mechanical damage, dust, and moisture. When the stress transducer 2 is subjected to tensile force, positive and negative strains are generated in the patch area. The corresponding strain gauges in this area are stretched or compressed, causing their resistance to increase or decrease, breaking the bridge circuit balance and forming a voltage difference, thereby generating a mV voltage signal corresponding to the pressure value. This mV signal can be converted into a standard analog signal such as 4~20mA or 0~10V through a signal transmitter according to the needs of the field application. This mV signal can also be converted and output as a digital signal to enter the integrated control system.

[0030] Example 1 like Figure 1 and Figure 2 As shown, the drilling rig hook load precision direct measurement device proposed in this embodiment includes a traveling block 1. A pair of stress converters 2 are connected to the lower part of the traveling block 1. The other ends of the two stress converters 2 are connected to a connecting seat 6. The other end of the connecting seat 6 is connected to a top drive 8. A drill string 9 is connected to the lower part of the top drive 8. The stress converters 2 are connected to a signal processor 3 through signal lines. The stress converters 2 are connected to a power supply through wires. The output end of the signal processor 3 is connected to a display device 5 through a transmission cable 4.

[0031] Example 2 like Figure 1-3As shown, the drilling rig hook load precision direct measurement device proposed in this embodiment includes a traveling block 1. A pair of stress transducers 2 are connected to the lower part of the traveling block 1. The other ends of the two stress transducers 2 are connected to a connecting seat 6. The other end of the connecting seat 6 is connected to a top drive 8. A drill string 9 is connected to the lower part of the top drive 8. The stress transducers 2 are connected to a signal processor 3 via signal lines. The stress transducers 2 are connected to a power supply via wires. The output end of the signal processor 3 is connected to a display device 5 via a transmission cable 4. The traveling block 1 includes a traveling block body 101. A pair of lugs 102 are fixed to the bottom of the traveling block body 101. The two lugs 102 are symmetrically distributed along the traveling block body 101.

[0032] Example 3 like Figure 1-3 As shown, the drilling rig hook load precision direct measurement device proposed in this embodiment includes a traveling block 1. A pair of stress transducers 2 are connected to the lower part of the traveling block 1. The other ends of the two stress transducers 2 are connected to a connecting seat 6. The other end of the connecting seat 6 is connected to a top drive 8. A drill string 9 is connected to the lower part of the top drive 8. The stress transducers 2 are connected to a signal processor 3 via signal lines. The stress transducers 2 are connected to a power supply via wires. The output end of the signal processor 3 is connected to a display device 5 via a transmission cable 4. The traveling block 1 includes a traveling block body 101. A pair of lugs 102 are fixed to the bottom of the traveling block body 101. The two lugs 102 are symmetrically distributed along the traveling block body 101. Each lug 102 includes a first lug plate 1021. A lug plate seat 1022 is vertically fixed to the first lug plate 1021. A second lug plate 1023 is vertically fixed to the lug plate seat 1022. Both the first lug plate 1021 and the second lug plate 1023 have through holes. The lug plate seat 1022 is fixed to the bottom of the traveling block body 101.

[0033] Example 4 like Figure 1-5As shown, the drilling rig hook load precision direct measurement device proposed in this embodiment includes a traveling block 1. A pair of stress transducers 2 are connected to the lower part of the traveling block 1. The other ends of the two stress transducers 2 are connected to a connecting seat 6. The other end of the connecting seat 6 is connected to a top drive 8. A drill string 9 is connected to the lower part of the top drive 8. The stress transducers 2 are connected to a signal processor 3 via signal lines. The stress transducers 2 are connected to a power supply via wires. The output end of the signal processor 3 is connected to a display device 5 via a transmission cable 4. The traveling block 1 includes a traveling block body 101. A pair of lugs 102 are fixed to the bottom of the traveling block body 101. The two lugs 102 are symmetrically distributed along the traveling block body 101. Each lug 102 includes a first lug plate 1021. A lug plate seat 1022 is vertically fixed to the first lug plate 1021. A second lug plate 1023 is vertically fixed to the lug plate seat 1022. Both the first lug plate 1021 and the second lug plate 1023 have through holes. The lug plate seat 1022 is fixed to the bottom of the traveling block body 101. The stress transducer 2 includes a stress transducer body 201, which is elongated. The stress transducer body 201 has hanging ear holes 202 and lifting ear holes 203, which are symmetrically distributed along the center of the stress transducer body 201. Stress deformation blind holes 204 are respectively formed at the center of two symmetrical surfaces of the stress transducer body 201. Four patch through holes 205 are formed at the bottom of each stress deformation blind hole 204, and are evenly distributed along the center of each stress deformation blind hole 204. An insulating layer is attached to the bottom of each stress deformation blind hole 204. Hanging ear bolts 206 are inserted into the hanging ear holes 202, and both ends of the hanging ear bolts 206 pass through through holes in the first ear plate 1021 and the second ear plate 1023.

[0034] Example 5 like Figure 1-5As shown, the drilling rig hook load precision direct measurement device proposed in this embodiment includes a traveling block 1. A pair of stress transducers 2 are connected to the lower part of the traveling block 1. The other ends of the two stress transducers 2 are connected to a connecting seat 6. The other end of the connecting seat 6 is connected to a top drive 8. A drill string 9 is connected to the lower part of the top drive 8. The stress transducers 2 are connected to a signal processor 3 via signal lines. The stress transducers 2 are connected to a power supply via wires. The output end of the signal processor 3 is connected to a display device 5 via a transmission cable 4. The traveling block 1 includes a traveling block body 101. A pair of lugs 102 are fixed to the bottom of the traveling block body 101. The two lugs 102 are symmetrically distributed along the traveling block body 101. Each lug 102 includes a first lug plate 1021. A lug plate seat 1022 is vertically fixed to the first lug plate 1021. A second lug plate 1023 is vertically fixed to the lug plate seat 1022. Both the first lug plate 1021 and the second lug plate 1023 have through holes. The lug plate seat 1022 is fixed to the bottom of the traveling block body 101. The stress transducer 2 includes a stress transducer body 201, which is elongated. The stress transducer body 201 has hanging ear holes 202 and lifting ear holes 203, which are symmetrically distributed along the center of the stress transducer body 201. Stress deformation blind holes 204 are respectively formed at the center of two symmetrical surfaces of the stress transducer body 201. Four patch through holes 205 are formed at the bottom of each stress deformation blind hole 204, and are evenly distributed along the center of each stress deformation blind hole 204. An insulating layer is attached to the bottom of each stress deformation blind hole 204. Hanging ear bolts 206 are inserted into the hanging ear holes 202, and both ends of the hanging ear bolts 206 pass through through holes in the first ear plate 1021 and the second ear plate 1023. A first strain gauge, a second strain gauge, a third strain gauge, and a fourth strain gauge are attached to the upper surface of the insulating layer. The first strain gauge, the second strain gauge, the third strain gauge, and the fourth strain gauge are connected end to end by wires. The first strain gauge, the second strain gauge, the third strain gauge, and the fourth strain gauge are aligned with the corresponding through holes 205. The first strain gauge and the second strain gauge are also connected to the positive terminal of the power supply by wires, and the third strain gauge and the fourth strain gauge are also connected to the negative terminal of the power supply by wires. The first strain gauge and the fourth strain gauge are also connected to the input terminal of the signal processor 3 by wires, and the second strain gauge and the third strain gauge are also connected to the output terminal of the signal processor 3 by wires.

[0035] Example 6 like Figure 1-5As shown, the drilling rig hook load precision direct measurement device proposed in this embodiment includes a traveling block 1. A pair of stress transducers 2 are connected to the lower part of the traveling block 1. The other ends of the two stress transducers 2 are connected to a connecting seat 6. The other end of the connecting seat 6 is connected to a top drive 8. A drill string 9 is connected to the lower part of the top drive 8. The stress transducers 2 are connected to a signal processor 3 via signal lines. The stress transducers 2 are connected to a power supply via wires. The output end of the signal processor 3 is connected to a display device 5 via a transmission cable 4. The traveling block 1 includes a traveling block body 101. A pair of lugs 102 are fixed to the bottom of the traveling block body 101. The two lugs 102 are symmetrically distributed along the traveling block body 101. Each lug 102 includes a first lug plate 1021. A lug plate seat 1022 is vertically fixed to the first lug plate 1021. A second lug plate 1023 is vertically fixed to the lug plate seat 1022. Both the first lug plate 1021 and the second lug plate 1023 have through holes. The lug plate seat 1022 is fixed to the bottom of the traveling block body 101. The stress transducer 2 includes a stress transducer body 201, which is elongated. The stress transducer body 201 has hanging ear holes 202 and lifting ear holes 203, which are symmetrically distributed along the center of the stress transducer body 201. Stress deformation blind holes 204 are respectively formed at the center of two symmetrical surfaces of the stress transducer body 201. Four patch through holes 205 are formed at the bottom of each stress deformation blind hole 204, and are evenly distributed along the center of each stress deformation blind hole 204. An insulating layer is attached to the bottom of each stress deformation blind hole 204. Hanging ear bolts 206 are inserted into the hanging ear holes 202, and both ends of the hanging ear bolts 206 pass through through holes in the first ear plate 1021 and the second ear plate 1023. A first strain gauge, a second strain gauge, a third strain gauge, and a fourth strain gauge are attached to the upper surface of the insulating layer. These strain gauges are connected end-to-end by wires and aligned with their corresponding through-holes 205. The first and second strain gauges are also connected to the positive terminal of a power supply via wires, while the third and fourth strain gauges are connected to the negative terminal via wires. The first and fourth strain gauges are also connected to the input terminal of the signal processor 3 via wires, and the second and third strain gauges are connected to the output terminal of the signal processor 3 via wires. A lifting bolt 207 passes through the lifting lug hole 203, and both ends of the lifting bolt 207 extending out of the lifting lug hole 203 are connected to a connecting seat 6.

[0036] Example 7 like Figure 1-5 As shown, the method for measuring the load using a precise direct measuring device for the drilling rig hook proposed in this embodiment specifically includes the following steps: S1. Suspend the traveling block 1 of the drilling rig hook-loaded precision direct measurement device on the derrick 7 via steel wire rope 11, and turn on the power; S2, the total gravity of the top drive 8 and the drill string 9 directly exerts a tensile force on the stress converter 2, causing the stress converter 2 to deform. S3, the first strain gauge, the second strain gauge, the third strain gauge and the fourth strain gauge deform as the stress converter 2 deforms, generating electrical signals. The electrical signals are connected to the signal processor 3 through wires. After processing the signals, the signal processor transmits the calculated tensile force data to the display device 5 through the transmission cable 4.

Claims

1. A precise direct measurement device for drilling rig hook load, characterized in that, The system includes a traveling carriage (1), with a pair of stress transducers (2) connected to the bottom of the traveling carriage (1). The other ends of the two stress transducers (2) are connected to a connecting seat (6), and the other end of the connecting seat (6) is connected to a top drive (8). A drill string (9) is connected to the bottom of the top drive (8). The stress transducers (2) are connected to a signal processor (3) via signal lines. The stress transducers (2) are connected to a power source via wires. The output end of the signal processor (3) is connected to a display device (5) via a transmission cable (4).

2. The drilling rig hook load precision direct measurement device according to claim 1, characterized in that, The tour vehicle (1) includes a tour vehicle body (101), and a pair of hanging ears (102) are fixed to the bottom of the tour vehicle body (101). The two hanging ears (102) are symmetrically distributed along the tour vehicle body (101).

3. The drilling rig hook load precision direct measurement device according to claim 2, characterized in that, Each of the aforementioned ear loops (102) includes a first ear plate (1021), the first ear plate (1021) is vertically fixed to an ear plate seat (1022), the ear plate seat (1022) is vertically fixed to a second ear plate (1023), both the first ear plate (1021) and the second ear plate (1023) are provided with through holes, and the ear plate seat (1022) is fixed to the bottom of the traveling carriage body (101).

4. The drilling rig hook load precision direct measurement device according to claim 3, characterized in that, The stress converter (2) includes a stress converter body (201), which is in the shape of a long plate. The stress converter body (201) has a hanging ear hole (202) and a lifting ear hole (203). The hanging ear hole (202) and the lifting ear hole (203) are symmetrically distributed along the center of the stress converter body (201). Stress deformation blind holes (204) are respectively opened at the center of the two symmetrical surfaces of the stress converter body (201). Four patch through holes (205) are opened at the bottom of the stress deformation blind holes (204). The four patch through holes (205) are evenly distributed along the center of the stress deformation blind holes (204). An insulating layer is attached to the bottom of each stress deformation blind hole (204).

5. The drilling rig hook load precision direct measurement device according to claim 4, characterized in that, The ear-hanging hole (202) is provided with an ear-hanging bolt (206), and the two ends of the ear-hanging bolt (206) are provided in the through holes on the first ear plate (1021) and the second ear plate (1023).

6. The drilling rig hook load precision direct measurement device according to claim 5, characterized in that, The upper surface of the insulating layer is attached with a first strain gauge, a second strain gauge, a third strain gauge, and a fourth strain gauge. The first strain gauge, the second strain gauge, the third strain gauge, and the fourth strain gauge are connected end to end by wires. The first strain gauge, the second strain gauge, the third strain gauge, and the fourth strain gauge are aligned with the corresponding patch through holes (205). The first strain gauge and the second strain gauge are also connected to the positive terminal of the power supply by wires. The third strain gauge and the fourth strain gauge are also connected to the negative terminal of the power supply by wires. The first strain gauge and the fourth strain gauge are also connected to the input terminal of the signal processor (3) by wires. The second strain gauge and the third strain gauge are also connected to the output terminal of the signal processor (3) by wires.

7. The drilling rig hook load precision direct measurement device according to claim 6, characterized in that, The lifting lug hole (203) is provided with a lifting lug bolt (207), and the two ends of the lifting lug bolt (207) extending out of the lifting lug hole (203) are connected to a connecting seat (6).

8. A method for measuring drilling rig hook load using the precise direct measuring device as described in claim 7, characterized in that, Specifically, the steps include the following: S1. The traveling block (1) of the drilling rig hook-loaded precision direct measurement device is suspended on the derrick (7) by steel wire rope (11), and the power supply is turned on; S2, the total gravity of the top drive (8) and the drill string (9) directly exerts a tensile force on the stress converter (2), causing the stress converter (2) to deform; S3. The first strain gauge, the second strain gauge, the third strain gauge and the fourth strain gauge deform with the deformation of the stress converter (2) and generate electrical signals. The electrical signals are connected to the signal processor (3) through wires. After processing the signals, the signal processor transmits the calculated tensile data to the display device (5) through the transmission cable (4).

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