Near-bit device for measuring torque and feeding force while drilling

Abstract

The utility model discloses a near-bit device for measuring torque and feeding force while drilling. The near-bit device comprises a measurement-while-drilling drill rod, a charging base and information processing equipment, in the drilling process of the drill bit, the measurement-while-drilling drill rod obtains a strain electric signal in real time and wirelessly transmits the strain electric signal to information processing equipment, so that torque and feeding force borne by the drill rod in the drilling process are obtained in real time; the protective sleeve is arranged outside the strain gauge and can effectively prevent broken rocks around a drill hole from impacting the strain gauge, so that stable operation of the strain gauge is guaranteed, after one-time measurement while drilling is completed, due to the fact that the protective sleeve is detachably connected, the strain gauge can be conveniently overhauled after being detached, and the precision and stability of subsequent measurement while drilling are guaranteed; during charging, an internal power supply does not need to be taken out, and the measurement-while-drilling drill rod is placed on the charging base for wireless charging, so that disassembly-free electric energy supplementation is quickly realized, and subsequent efficient and stable use of the measurement-while-drilling drill rod is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine geological exploration drilling engineering, in particular to a device with near-bit measurement of torque and feed force while drilling. Background Technique

[0002] During the mining process, if there are significant differences in the mechanical properties of coal and rock masses, it will cause uneven stress distribution and easily lead to local stress concentration, which provides conditions for inducing dynamic disasters such as coal and gas outbursts. Measurement while drilling is a technology for real-time measurement during the drilling process. When the mechanical parameters of coal and rock masses change, the parameters while drilling during the drilling process will also change accordingly. Therefore, the mechanical property changes of the coal and rock masses in front of the drill bit can be inversely deduced by monitoring and analyzing the parameters while drilling, thereby preventing the occurrence of dynamic disasters such as coal and gas outbursts.

[0003] At present, the testing of the uniaxial compressive strength of rocks at home and abroad mainly includes indoor mechanical testing and in-situ testing on-site. Conventional mechanical property testing requires coring from on-site boreholes, maintaining the cored specimens and transporting them to the laboratory for mechanical property testing. The process is cumbersome, complex, has a long cycle, and is costly. Currently, the point load test method is generally used on-site to predict the compressive strength of rocks. The experimental research results show that there is a significant correlation between the point load strength of rocks and the uniaxial compressive strength. However, the conversion coefficients between the point load strength and the uniaxial compressive strength of different types of rocks are different, and accurate and rapid prediction cannot be achieved, which has certain limitations. Although there are some measurement-while-drilling devices currently, since strain gauges are mainly relied on for data acquisition in the measurement-while-drilling devices, once damaged, they cannot be repaired and replaced in time. At the same time, measurement while drilling mainly relies on internal batteries for power supply. When the battery power is insufficient, the battery needs to be disassembled and replaced, resulting in complex operation and affecting the subsequent use of the measurement-while-drilling device. Summary of the Invention

[0004] Aiming at the problems existing in the above-mentioned prior art, the utility model provides a device with near-bit measurement of torque and feed force while drilling, which can facilitate the maintenance of strain gauges and can charge the battery without disassembling the battery, thereby ensuring the efficient and stable use of the measurement-while-drilling device.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is: a device with near-bit measurement of torque and feed force while drilling, including a measurement-while-drilling drill pipe, a charging base, and an information processing device;

[0006] The measurement-while-drilling drill pipe includes a strain section of the pipe body and a main section of the pipe body. The strain section of the pipe body is coaxially connected to the main section of the pipe body, and the outer diameter of the strain section of the pipe body is smaller than that of the main section of the pipe body. An annular groove is formed on the circumferential surface of the strain section of the pipe body, and a strain gauge is installed in the annular groove for collecting axial strain data and radial strain data of the strain section of the pipe body. A protective sleeve is sleeved on the strain section of the pipe body and covers the annular groove for protecting the strain gauge. An open-ended cavity and a plug wedge are arranged in the main section of the pipe body, and an electronic circuit device is installed in the cavity for receiving the data collected by the strain gauge and sending the data to an information processing device. The plug wedge seals the cavity, and a first wireless charging module is arranged inside the plug wedge. The first wireless charging module is connected to the electronic circuit device for charging the built-in power supply of the electronic circuit device during wireless charging.

[0007] A second wireless charging module is arranged on the charging base. During wireless charging, the measurement-while-drilling drill pipe is installed on the charging base, and the first wireless charging module is wirelessly powered by the second wireless charging module to charge the built-in power supply of the electronic circuit device.

[0008] The information processing device communicates with the electronic circuit device wirelessly for receiving the data fed back by the electronic circuit device and obtaining the real-time torque and feed force of the drill pipe during drilling after processing the data.

[0009] Furthermore, a first installation groove and a second protrusion are respectively arranged on the circumferential surface of the strain section of the pipe body on both sides of the annular groove, and a second installation groove and a first protrusion are respectively arranged on the inner walls of the protective sleeve near both ends. When the protective sleeve is sleeved on the strain section of the pipe body, the first protrusion is located in the first installation groove and the second protrusion is located in the second installation groove for detachably fixing the protective sleeve on the strain section of the pipe body.

[0010] Furthermore, the outer diameter of the protective sleeve is the same as that of the main section of the pipe body. This structure facilitates subsequent drilling.

[0011] Further, the electronic circuit device includes a power supply, a voltage regulator, a signal receiving module, an operational amplifier module, a control module, a storage module, a push-button switch, and a communication module. The signal receiving module is connected to the strain gauge and is used to receive the real-time voltage signal transmitted by the strain gauge. The operational amplifier module is respectively connected to the signal receiving module and the control module and is used to amplify the voltage signal transmitted by the signal receiving module and then transmit it to the control module. The control module is respectively connected to the storage module and the communication module and is used to send the data to the information processing device through the communication module and store the data in the storage module at the same time. The power supply supplies power to the signal receiving module, the operational amplifier module, the control module, the storage module, and the communication module through the voltage regulator. The push-button switch is connected to the control module and is used to control the opening and closing of the electronic circuit device. A switch hole is formed in the circumferential surface of the main body section of the rod, and the switch hole extends into the cavity so that the push-button switch is located in the switch hole for externally controlling the push-button switch. The electronic circuit device with this structure can meet the required detection requirements.

[0012] Further, a first water flow channel is axially formed inside the strain section of the rod, and two second water flow channels are axially formed inside the strain sections of the rod on both sides of the cavity. Both of the two second water flow channels are communicated with the first water flow channel and are used to discharge the water inside the drill hole through the first water flow channel and the second water flow channels when the drill bit drills.

[0013] Further, a male thread is formed at the end of the strain section of the rod, and a female thread is formed at the end of the main body section of the rod, which is convenient for connecting with the drill bit and other drill pipes.

[0014] Compared with the prior art, the present utility model adopts a combination of a measurement-while-drilling drill pipe, a charging base, and an information processing device, and has the following advantages:

[0015] 1. During the drilling process of the drill bit, the measurement-while-drilling drill pipe of the present utility model can obtain the electrical signals representing the axial strain and radial strain of the strain section of the rod in real time through the strain gauge, and after being wirelessly transmitted to the information processing device through the electronic circuit device for processing, the torque and feed force borne by the drill pipe during the drilling process can be obtained in real time. And the outside of the strain gauge is a protective sleeve, which can effectively prevent the broken rock blocks around the drill hole from impacting the strain gauge during the drilling process, thus ensuring the stable operation of the strain gauge. At the same time, after a measurement-while-drilling is completed, since the protective sleeve is detachably connected, it is convenient to disassemble and repair the strain gauge to ensure the accuracy and stability of subsequent measurement-while-drilling.

[0016] 2. After a measurement-while-drilling is completed, there is no need to take out the internal power supply. Only need to place the measurement-while-drilling drill pipe on the charging base. At this time, the wireless charging module two of the charging base wirelessly supplies power to the wireless charging module one to charge the built-in power supply of the electronic circuit device, so as to quickly realize the power supply without disassembly and facilitate the subsequent efficient and stable use of the measurement-while-drilling drill pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present utility model;

[0018] Figure 2 is a schematic internal structural diagram of the present utility model;

[0019] Figure 3 is a schematic structural diagram of the first and second water flow channels of the present utility model;

[0020] Figure 4 is a schematic structural diagram of the switch hole of the present utility model;

[0021] Figure 5 is a schematic structural diagram of the electronic circuit device of the present utility model;

[0022] Figure 6 is a schematic internal diagram of the protective sleeve of the present utility model;

[0023] Figure 7 is a schematic structural diagram of the charging base of the present utility model;

[0024] Figure 8 is a schematic diagram of the information processing device of the present utility model.

[0025] In the figures: 1, measurement-while-drilling drill pipe; 2, annular groove; 3, main body section of the rod; 4, strain gauge; 5, cavity; 6, electronic circuit device; 7, strain section of the rod; 8, plugging wedge; 9, charging base; 10, first water flow channel; 11, switch hole; 12, first installation groove; 13, second protrusion; 14, male thread; 15, female thread; 16, first wireless charging module; 17, second wireless charging module; 18, second water flow channel; 19, information processing device; 20, power supply; 21, voltage regulator; 22, signal receiving module; 23, operational amplifier module; 24, control module; 25, storage module; 26, communication module. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The present utility model will be further described below.

[0027] As Figure 1 and 2 shown, the present utility model includes a measurement-while-drilling drill pipe 1, a charging base 9, and an information processing device 19;

[0028] The measurement-while-drilling drill pipe includes a rod body strain section 7 and a rod body main section 3. The rod body strain section 7 is coaxially connected to the rod body main section 3, and the outer diameter of the rod body strain section 7 is smaller than that of the rod body main section 7. An annular groove 2 is formed on the circumferential surface of the rod body strain section 7, and a strain gauge 4 is installed in the annular groove 2 for collecting axial strain data and radial strain data of the rod body strain section 7; a protective sleeve is sleeved on the rod body strain section 7 and covers the annular groove 2 for protecting the strain gauge 4; as Figure 6 shown, on the circumferential surface of the rod body strain section 7 on both sides of the annular groove 2, there are respectively an installation groove one 12 and a protrusion two 13. On the inner walls of the protective sleeve near both ends, there are respectively an installation groove two and a protrusion one. When the protective sleeve is sleeved on the rod body strain section 7, the protrusion one is in the installation groove one 12 and the protrusion two 13 is in the installation groove two, for detachably fixing the protective sleeve on the rod body strain section 7; the outer diameter of the protective sleeve is the same as that of the rod body main section 3.

[0029] In the rod body main section 3, there is a cavity 5 with one end open and a plugging wedge 8. An electronic circuit device 6 is installed in the cavity 5 for receiving the data collected by the strain gauge 4 and sending it to the information processing device 19; the plugging wedge 8 plugs the cavity 5, and a wireless charging module one 16 is arranged inside the plugging wedge 8. The wireless charging module one 16 is connected to the electronic circuit device 6 for charging the built-in power supply 20 of the electronic circuit device 6 during wireless charging; as Figure 5 shown, the electronic circuit device 6 includes a power supply 20, a voltage regulator 21, a signal receiving module 22, an operational amplifier module 23, a control module 24, a storage module 25, a push-button switch, and a communication module 26. The signal receiving module 22 is connected to the strain gauge 4 for receiving the real-time voltage signal transmitted from the strain gauge 4. The operational amplifier module 23 is respectively connected to the signal receiving module 22 and the control module 24 for amplifying the voltage signal transmitted from the signal receiving module 22 and then transmitting it to the control module 24; the control module 24 is respectively connected to the storage module 25 and the communication module 26 for sending the data to the information processing device 19 through the communication module 26, and at the same time storing the data in the storage module 25; the power supply 20 supplies power to the signal receiving module 22, the operational amplifier module 23, the control module 24, the storage module 25, and the communication module 26 through the voltage regulator 21; the push-button switch is connected to the control module 24 for controlling the opening and closing of the electronic circuit device 6; as Figure 4 shown, a switch hole 11 is formed on the circumferential surface of the rod body main section 3, and the switch hole 11 extends into the cavity 5 so that the push-button switch is in the switch hole 11 for controlling the push-button switch from the outside.

[0030] As Figure 7As shown, a second wireless charging module 17 is provided on the charging base 9. During wireless charging, the measurement-while-drilling drill pipe 1 is mounted on the charging base 9, and the second wireless charging module 17 wirelessly powers the first wireless charging module 16 to charge the built-in power supply 20 of the electronic circuit device 6.

[0031] As Figure 8 shown, the information processing device 19 communicates wirelessly with the electronic circuit device 6, and is used to receive the data fed back by the electronic circuit device 6, and obtain the real-time torque and feed force of the drill pipe during drilling after processing the data.

[0032] As an improvement of the present utility model, as Figure 3 shown, a first water flow channel 10 is axially opened inside the rod body strain section 7, and two second water flow channels 18 are axially opened inside the rod body strain sections 7 on both sides of the cavity 5. Both of the two second water flow channels 18 communicate with the first water flow channel 10, and are used to discharge the water inside the drill hole through the first water flow channel 10 and the second water flow channels 18 when the drill bit drills.

[0033] As another improvement of the present utility model, male threads 14 are opened at the ends of the rod body strain sections 7, and female threads 15 are opened at the ends of the rod body main sections 3, which are convenient for connecting with the drill bit and other drill pipes.

[0034] The above-mentioned power supply 20, voltage regulator 21, signal receiving module 22, operational amplifier module 23, control module 24, storage module 25, push-button switch, communication module 26, first wireless charging module 16, second wireless charging module 17 and information processing device 19 are all existing devices, which can be directly purchased from the market. The present utility model only utilizes their existing functions.

[0035] Before drilling, connect the two ends of the measurement-while-drilling drill pipe 1 to the drill bit and the ordinary drill pipe coaxially through the male thread 14 and the female thread 15 respectively, and control the push-button switch to be in the on state through the switch hole 11. At this time, the entire electronic circuit device 6 is in the working state, and the wireless communication state between the information processing device 19 and the electronic circuit device 6 is tested to complete the assembly and preparation work of the measurement-while-drilling drill pipe 1; when starting the construction, the measurement-while-drilling drill pipe 1 drills into the coal and rock mass along with the drill bit; at the same time, the strain gauge 4 obtains the electrical signals representing the axial strain and the radial strain of the rod strain section 7 in real time and feeds them back to the electronic circuit device 6. The electronic circuit device 6 wirelessly transmits this data to the information processing device 19, so that the information processing device 19 can obtain the torque and the feed force borne by the drill pipe during the drilling process in real time; when a drilling measurement is completed, take out the measurement-while-drilling drill pipe 1 and the drill bit from the drill hole together. At this time, disassemble the measurement-while-drilling drill pipe 1 from the ordinary drill pipe and the drill bit, and remove the protective sleeve from the rod strain section 7 to repair the strain gauge 4; after the repair is completed, close the push-button switch through the switch hole 11 to turn off the electronic circuit device 6; then place the measurement-while-drilling drill pipe 1 on the charging base 9, connect the charging base 9 to an external power supply for wireless charging. At this time, the wireless charging module two 17 wirelessly supplies power to the wireless charging module one 16 to charge the built-in power supply 20 of the electronic circuit device 6. After completion, the measurement-while-drilling drill pipe 1 is used for the next drilling measurement.

[0036] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art of this technology, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A device for measuring torque and feed force while drilling near the drill bit, characterized in that: Including measurement while drilling drill pipe, charging base and information processing equipment; The measurement while drilling drill pipe comprises a rod body strain section and a rod body main section, the rod body strain section is coaxially connected with the rod body main section, and the outer diameter of the rod body strain section is smaller than the outer diameter of the rod body main section, an annular groove is provided on the circumferential surface of the rod body strain section, and a strain gauge is installed in the annular groove, which is used to collect axial strain data and radial strain data of the rod body strain section; a protective sleeve is sleeved on the rod body strain section and covers the annular groove, which is used to protect the strain gauge; a cavity with an open end and a blocking wedge are provided in the rod body main section, and an electronic circuit device is installed in the cavity, which is used to receive data collected by the strain gauge and send it to an information processing device; the blocking wedge blocks the cavity, and a wireless charging module 1 is provided inside the blocking wedge, and the wireless charging module 1 is connected to the electronic circuit device, which is used to charge the built-in power supply of the electronic circuit device during wireless charging; The charging base is provided with a second wireless charging module. During wireless charging, the drill pipe for measurement while drilling is installed on the charging base, and the wireless charging module 1 is wirelessly powered by the second wireless charging module to charge the built-in power supply of the electronic circuit device. The information processing device communicates wirelessly with the electronic circuit device, is used to receive data fed back by the electronic circuit device, and obtains the real-time torque and feed force of the drill rod during the drilling process after processing the data.

2. The device for measuring torque and feed force while drilling near the drill bit according to claim 1, characterized in that: A mounting groove 1 and a protrusion 2 are respectively provided on the circumferential surface of the rod body strain segment on both sides of the annular groove, and a mounting groove 2 and a protrusion 1 are respectively provided on the inner wall of the protective sleeve close to the two ends. When the protective sleeve is sleeved on the rod body strain segment, the protrusion 1 is in the mounting groove 1 and the protrusion 2 is in the mounting groove 2, so that the protective sleeve can be detachably fixed on the rod body strain segment.

3. The device for measuring torque and feed force while drilling near the drill bit according to claim 1, characterized in that: The outer diameter of the protective sleeve is the same as the outer diameter of the rod body main section.

4. The device for measuring torque and feed force while drilling near the drill bit according to claim 1, characterized in that: The electronic circuit device includes a power supply, a voltage stabilizer, a signal receiving module, an operational amplifier module, a control module, a storage module, a button switch and a communication module. The signal receiving module is connected to the strain gauge and is used to receive the real-time voltage signal transmitted by the strain gauge. The operational amplifier module is respectively connected to the signal receiving module and the control module, and is used to amplify the voltage signal transmitted by the signal receiving module and transmit it to the control module; the control module is respectively connected to the storage module and the communication module, and is used to send the data to the information processing device through the communication module, and store the data in the storage module at the same time; the power supply supplies power to the signal receiving module, the operational amplifier module, the control module, the storage module and the communication module through the voltage stabilizer; the button switch is connected to the control module and is used to control the opening and closing of the electronic circuit device; a switch hole is provided on the circumferential surface of the main section of the rod body, and the switch hole extends into the cavity so that the button switch is in the switch hole, which is used to control the button switch from the outside.

5. The device for measuring torque and feed force while drilling near the drill bit according to claim 1, characterized in that: A water flow channel 1 is axially opened inside the rod strain section, and two water flow channels 2 are axially opened inside the rod strain section on both sides of the cavity. Both water flow channels 2 are connected to water flow channel 1, and are used to discharge water inside the borehole through water flow channel 1 and water flow channel 2 when the drill bit is drilling.

6. The device for measuring torque and feed force while drilling near the drill bit according to claim 1, characterized in that: The end of the rod body strain section is provided with a male thread, and the end of the rod body main section is provided with a female thread, so as to facilitate connection with a drill bit and other drill rods.

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