Measurement while drilling nipple

Abstract

The invention relates to the technical field of petroleum drilling tools, in particular to a measurement-while-drilling nipple which comprises an upper cover, a lower cover, a core pipe, an outer cylinder, a bit pressure, torque and bending moment composite sensor, an inner temperature and pressure sensor, an outer temperature and pressure sensor, a power generation unit, a processing unit and a storage unit. And an outer cylinder is arranged outside the core tube. The device is reasonable and compact in structure, when the device is used, the measurement-while-drilling short section is installed at the position close to a drill bit, in the drilling process, the inner temperature and pressure sensor and the outer temperature and pressure sensor collect temperature and annular pressure information, bit pressure and drill rod deformation can be transmitted to the measurement-while-drilling short section, bit pressure, bending moment and torque information can be measured by measuring deformation of the core pipe, and the device is convenient to use. And the power generation unit enables the measurement-while-drilling nipple to have an autonomous endurance function, so that the transmission power of the processing unit can be properly increased, and the clearness and the accuracy of information are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of oil drilling tools and is a measurement while drilling pup joint. Background Art

[0002] With the continuous deepening of oil exploration and development, there are more and more special and complex wells such as deep wells, ultra-deep wells and large-displacement horizontal wells. The incidence of abnormal and complex situations in the drilling process is getting higher and higher, which poses unprecedented challenges to the control of the drilling process. During the drilling process, parameters such as the temperature and pressure of the entire wellbore are always the parameters that drilling engineers pay attention to. How to quickly and accurately detect parameters such as temperature and pressure in the annulus is of great significance to safe and efficient drilling.

[0003] A Chinese patent document with publication number CN119102592A discloses a multi-position drilling parameter monitoring device and method, the multi-position drilling parameter monitoring device includes a drill collar body, a skeleton and a sleeve; the skeleton is located inside the sleeve and is connected to the drill collar body; the drill collar body is axially provided with several groups of first cylindrical grooves and a group of second cylindrical grooves; in each group, there are several first cylindrical grooves and second cylindrical grooves, and they are circumferentially distributed along the outer wall of the drill collar body; in the same transverse cross-section, a transverse power-on groove for communication is provided between the bottoms of adjacent first cylindrical grooves, and in the same longitudinal cross-section, the bottom side walls of the second cylindrical groove and all the first cylindrical grooves are provided with the same longitudinal power-on groove; a bending moment detection module is installed in the second cylindrical groove, and the bending moment detection module is used to detect the bending moment of the drill collar body; a speed sensor, an impact vibration sensor and a temperature sensor are installed on the skeleton.

[0004] The Chinese patent document with publication number CN116104485A discloses a measurement while drilling device, which includes a drill collar body, a launch short section, a battery short section, an internal pressure sensor, an external pressure sensor, a power port plug, a communication plug cover, a communication plug, a long cover, an inner annulus cover, an outer annulus cover and a communication port cover. At least two mounting long grooves are provided at intervals along the circumference of the outer side of the middle part of the drill collar body, at least one mounting long groove is provided with a launch short section, at least one mounting long groove is provided with a battery short section, and a long cover is fixedly installed on the outer side of the drill collar body corresponding to each mounting long groove position; a first groove, a second groove and a third groove are provided at intervals along the circumference of the outer side of the upper part of the drill collar body, and the drill collar body is provided with a plurality of mounting slots. An internal pressure transmission hole that can be communicated with the first groove is provided inside, an internal pressure sensor is provided in the first groove, and an inner annular cover plate is fixedly installed in the first groove; an external pressure sensor is provided in the second groove, and an outer annular cover plate is fixedly installed on the outside of the drill collar body corresponding to the position of the second groove, and an external pressure transmission hole that passes through the inside and outside is provided on the outer annular cover plate; the third groove is provided with a power port plug, a communication plug cover plate and a communication plug from the inside to the outside, and a communication port cover plate is fixedly installed on the outside of the drill collar body corresponding to the position of the third groove; each installation long groove is connected to the adjacent installation long groove through a first radial channel, and the first groove, the second groove and the third groove are respectively connected to the installation long grooves at the corresponding positions through axial channels.

[0005] The existing measurement while drilling short section has the problems of short service time, high cost, low efficiency and inaccurate information collection when used in the oil drilling process. There is an urgent need for a measurement while drilling short section to solve the above problems. Summary of the Invention

[0006] The present invention provides a measurement while drilling sub that overcomes the above-mentioned deficiencies of the prior art and can effectively solve the problems of short service life, high cost and low efficiency of the measurement while drilling sub used in the existing oil drilling process.

[0007] The technical solution of the present invention is achieved through the following measures: a measurement while drilling short section, including an upper cover, a lower cover, a core tube, an outer tube, a drilling pressure torque and bending moment composite sensor, an internal temperature and pressure sensor, an external temperature and pressure sensor, a power generation unit, a processing unit and a storage unit, a core tube is fixedly installed at the center of the lower side of the upper cover, a lower cover is fixedly installed at the lower end of the core tube, an outer tube is provided on the outer side of the core tube, the upper end of the outer tube is sealed together with the upper cover, the lower end of the outer tube is sealed together with the lower cover, an annular installation cavity is provided between the inner side of the outer tube and the outer side of the core tube, and a plurality of drilling pressure torque and bending moment composite sensors are evenly distributed along the circumference of the outer side of the lower part of the core tube. A plurality of first collecting holes connected inside and outside are evenly distributed along the circumference on the inner side of the upper part of the core tube, and an internal temperature and pressure sensor for collecting the temperature and pressure of the fluid in the core tube is installed in each first collecting hole. A plurality of second collecting holes connected inside and outside are evenly distributed along the circumference on the outer side of the outer tube, and an external temperature and pressure sensor for collecting the temperature and pressure of the fluid outside the outer tube is installed in each second collecting hole. A power generation unit, a processing unit and a storage unit are arranged in the installation cavity. The drilling pressure torque and bending moment composite sensor, the internal temperature and pressure sensor, and the external temperature and pressure sensor are all connected to the processing unit, and the processing unit is respectively connected to the power generation unit and the storage unit.

[0008] The following are further optimizations and / or improvements to the above technical solutions: The above-mentioned installation cavity corresponding to the position below the internal temperature and pressure sensor can be provided with a casing sleeved on the outside of the core tube, and the outside of the casing corresponding to the position of the drilling pressure torque and bending moment composite sensor is provided with a strip-shaped through-hole that is connected inside and outside, and an inner tube is sleeved on the outside of the casing, and an end cover is fixedly installed between the inner side of the lower end of the inner tube and the outer side of the casing, and an upper partition and a lower partition are installed at intervals between the inner side of the inner tube and the outer side of the casing at the position above the end cover, a first electronic warehouse frame is provided between the upper side of the upper partition and the inner side of the upper part of the inner tube, a battery box is fixedly installed between the lower side of the upper partition and the upper side of the lower partition, and the lower side of the lower partition is fixedly installed between the end A second electronic warehouse frame is fixedly installed between the upper and lower sides of the cover, and a support frame is provided between the second electronic warehouse frame and the casing. The support frame is fixedly installed together with the end of each drilling pressure torque and bending moment composite sensor. The processing unit includes a temperature and pressure processor fixedly installed on the outside of the first electronic warehouse frame and a drilling pressure and bending moment processor fixedly installed on the outside of the second electronic warehouse frame. The internal temperature and pressure sensor and the external temperature and pressure sensor are both connected to the temperature and pressure processor, the drilling pressure torque and bending moment composite sensor is connected to the drilling pressure and bending moment processor, and the temperature and pressure processor and the drilling pressure and bending moment processor are both connected to the power generation unit and the storage unit.

[0009] A first mounting ring platform can be fixedly installed on the inner side of the upper part of the inner cylinder, and a first mounting ring groove with an opening downward is provided at the lower end of the first mounting ring platform. A second mounting ring platform is fixedly installed on the upper side of the upper partition plate, and a second mounting ring groove with an opening upward is provided at the upper end of the second mounting ring platform. The outer side of the upper part of the first electron warehouse frame is sleeved in the first mounting ring groove, and a first elastic reset component is sleeved in the first mounting ring groove at the upper end of the first electron warehouse frame. The outer side of the lower part of the first electron warehouse frame is sleeved in the second mounting ring groove, and the lower end of the first electron warehouse frame is provided with a second elastic reset component sleeved in the second mounting ring groove. A third mounting ring platform is fixedly installed on the lower side of the lower partition plate, and a third mounting ring groove with an opening downward is provided at the lower end of the third mounting ring platform. A fourth mounting ring platform is fixedly installed on the upper side of the end cover, and a fourth mounting ring groove with an opening upward is provided at the upper end of the fourth mounting ring platform. The outer side of the upper part of the second electron warehouse frame is sleeved in the third mounting ring groove, and the upper end of the second electron warehouse frame is provided with a third elastic reset component sleeved in the third mounting ring groove. The outer side of the lower part of the second electron warehouse frame is sleeved in the fourth mounting ring groove, and the lower end of the second electron warehouse frame is provided with a fourth elastic reset component sleeved in the fourth mounting ring groove.

[0010] The inner side of the core tube may be evenly distributed with two to four first collecting holes connected inside and outside along the circumference, and a second collecting hole is provided on the outer side of the outer cylinder corresponding to each first collecting hole position, and at least two battery boxes are distributed along the circumference between the upper partition and the lower partition, and the power generation unit includes a charging and discharging module, a power management module, a first power generation module and a second power generation module, one of the battery boxes is provided with a power management module, and at least one battery box is provided with a charging and discharging module, and at least one first power generation module is distributed along the circumference on the lower side of the upper cover corresponding to the position above the inner cylinder, and at least one second power generation module with the same structure as the first power generation module is provided on the upper side of the lower cover, the first power generation module and the second power generation module are both connected to the power management module, the power management module is connected to the charging and discharging module, and the charging and discharging modules are respectively connected to the temperature and pressure processor and the drilling pressure and bending moment processor, and a plurality of first threading holes are distributed along the circumference at the lower end of the upper partition, and a first limiting sleeve is fixedly installed on the lower side of the upper partition corresponding to each first threading hole position, and each first limiting sleeve The outer side of the lower part is provided with a second limiting sleeve, each second limiting sleeve is fixedly installed with the upper side of the battery box at the corresponding position, the lower end of each first limiting sleeve and the upper side of the battery box at the corresponding position are provided with a fifth elastic reset member, and the upper side of each battery box is provided with a second threading hole corresponding to the first threading hole and connected inside and outside, and a plurality of third threading holes are distributed at intervals along the circumference at the lower end of the lower partition, and a third limiting sleeve is fixedly installed on the upper side of the lower partition corresponding to each third threading hole position, and each third limiting sleeve The outer side of the upper part is covered with a fourth limit sleeve, and each fourth limit sleeve is fixedly installed together with the lower side of the battery box at the corresponding position. The upper end of each third limit sleeve and the lower side of the battery box at the corresponding position are provided with a sixth elastic reset part, and the lower side of each battery box is provided with a fourth threading hole that corresponds to the third threading hole one by one and is connected inside and outside. Several upper buffer assemblies are evenly distributed along the circumference between the upper end of the inner cylinder and the lower side of the upper cover, and a lower buffer assembly with the same structure as the upper buffer assembly and symmetrical distribution is provided between the lower side of the end cover and the upper side of the lower cover.

[0011] The above-mentioned first power generation module may include a shielding shell, a magnetic box, a shielding pad, a rubber pad, a magnet, a power generation sheet and an insulating sleeve. Several shielding shells are distributed along the circumference on the lower side of the upper cover. A magnetic box is fixedly installed in the shielding shell. The inner side of the upper part of the magnetic box is provided with a shielding pad and a rubber pad from top to bottom. Two magnets are provided on the inner side of the magnetic box corresponding to the position below the rubber pad from inside to outside. A power generation sheet is provided between the two magnets. There is a gap between the inner and outer sides of the power generation sheet and the two magnets. When the power generation sheet moves up and down relative to the magnet, it can output current to the power management module. The outer sides of the ends of the power generation sheet are each covered with an insulating sleeve.

[0012] A counterweight may be provided in the battery box.

[0013] The above-mentioned upper buffer assembly may include a limiting column, a vent column and a seventh elastic reset component. A plurality of air holes that pass through the upper and lower parts are distributed along the circumference at intervals on the upper end of the inner cylinder. A hollow limiting column is fixedly installed on the upper end of the inner cylinder corresponding to the position of each air hole. A tubular vent column is mounted on the outer side of the upper part of each limiting column. A plurality of air holes that are connected inside and outside are distributed along the circumference at intervals on the outer side of the vent column. A seventh elastic reset component is provided between the limiting column and the lower end of the upper cover.

[0014] A sealing tube may be provided between the inner side of the outer tube and the outer side of the inner tube. A first sealing ring groove and a second sealing ring groove with openings downward may be provided on the lower side of the upper cover from the inside to the outside. A third sealing ring groove and a fourth sealing ring groove with openings upward may be provided on the upper side of the lower cover from the inside to the outside. The outer side of the upper portion of the sealing tube is sealingly sleeved in the first sealing ring groove, and the outer side of the lower portion of the sealing tube is sealingly sleeved in the third sealing ring groove. A first sealing ring platform sealingly sleeved in the second sealing ring groove is fixed at the upper end of the outer tube, and a second sealing ring platform sealingly sleeved in the fourth sealing ring groove is fixed at the lower end of the outer tube. Several external mounting holes, which extend to the inner side of the sealing tube, are circumferentially spaced apart on the outer side of the upper portion and the outer side of the lower portion of the outer tube. A Peltier sheet is sealingly and fixedly installed in each external mounting hole, and the Peltier sheet is connected to the charge and discharge module.

[0015] An inner ring groove may be provided on the inner side of the middle portion of the outer cylinder, and an annular heat-insulating cavity is formed between the inner ring groove and the sealing tube, and a heat-insulating layer is provided in the heat-insulating cavity.

[0016] The present invention has a reasonable and compact structure. When in use, the measurement while drilling sub is installed near the drill bit. When drilling is carried out, the measurement while drilling sub can analyze, process and store the information collected in real time. The upper cover, outer tube and lower cover are fixed together by screw connection and sealing ring, which can prevent the upper cover, outer tube and lower cover from loosening due to vibration during the drilling process. Two sealing rings are provided at the connection between the upper cover, outer tube and lower cover to play a sealing role. In order to ensure the accurate measurement of bit pressure, bending moment and torque, the lower end of the core tube and the upper end of the lower cover are tightly fixed together to prevent the gap at the connection between the lower end of the core tube and the upper end of the lower cover to cause measurement distortion. At the same time, a sealing ring is also provided at the connection to play a sealing role.

[0017] During the drilling process, the internal temperature and pressure sensor and the external temperature and pressure sensor collect temperature and annular pressure information, and then transmit them to the processing unit through wires. The downhole measurement short section of the present application has a built-in power generation unit, which can realize autonomous power generation. The processing unit can improve the processing power, and store the temperature and annular pressure information in the storage unit after processing. It can also use existing public technology to process the temperature and annular pressure information and send it to the non-magnetic drill rod in the drill pipe. The non-magnetic drill rod will be further launched to the ground, thereby realizing the real-time transmission function of underground information. The power generation unit enables the downhole measurement short section to have an autonomous endurance function, which can appropriately increase the transmission power of the processing unit to ensure the clarity and accuracy of the information.

[0018] During drilling, a WOB, bending moment, and torque composite sensor is installed at the bottom of the core barrel. This sensor also utilizes a sputtered thin-film design and is integrated into a single unit. During drilling, the WOB and drill pipe deformation are transmitted to the measurement-while-drilling (MWD) sub. By measuring the core barrel deformation, the WOB, bending moment, and torque information can be measured. The MWD sub is connected to a processing unit via a wire for real-time transmission of the collected information. The processing unit processes and stores the drilling, bending, and torque information. Alternatively, using existing technologies, the WOB, bending moment, and torque information can be processed and sent to a non-magnetic drill pipe within the drill pipe. The non-magnetic drill pipe then transmits this information to the surface, enabling real-time transmission of underground information. The power generation unit provides the MWD sub with autonomous endurance, which can appropriately increase the processing unit's transmission power and ensure the clarity and accuracy of the information. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Attachment Figure 1 It is a schematic diagram of the main cross-sectional structure of the present invention one to nine.

[0020] Attachment Figure 2 This is a schematic diagram of the three-dimensional structure of the present inventions 1 to 9 after removing the outer cylinder and the sealing tube.

[0021] Attachment Figure 3 It is a schematic diagram of the three-dimensional cross-sectional structure of the inner cylinder of the first to ninth embodiments of the present invention.

[0022] Attachment Figure 4 This is a schematic diagram of the main cross-sectional structure of the outer cylinder in one to nine of the present invention.

[0023] Attachment Figure 5 This is a schematic diagram of the main cross-sectional structure of the upper cover and the core tube in the first to ninth embodiments of the present invention.

[0024] Attachment Figure 6 It is a schematic diagram of the three-dimensional structure of the upper cover and the core tube in the first to ninth embodiments of the present invention.

[0025] Attachment Figure 7 It is a schematic diagram of the three-dimensional structure of the drilling pressure torque and bending moment composite sensor of the present invention.

[0026] Attachment Figure 8 It is a schematic diagram of the three-dimensional structure of the support frame of the present invention.

[0027] Attachment Figure 9 Schematic diagram of the three-dimensional structure of the shielding shell in fifth to ninth aspects of the present invention.

[0028] Attachment Figure 10 Schematic diagram of the three-dimensional structure of the power generation sheet in fifth to ninth aspects of the present invention.

[0029] Attachment Figure 11Schematic diagram of the three-dimensional structure of the ninth thermal insulation layer of the present invention.

[0030] The codes in the accompanying drawings are: 1 is the upper cover, 2 is the lower cover, 3 is the core tube, 4 is the outer tube, 5 is the drilling pressure torque and bending moment composite sensor, 6 is the internal temperature and pressure sensor, 7 is the external temperature and pressure sensor, 8 is the installation cavity, 9 is the storage unit, 10 is the casing, 11 is the penetration hole, 12 is the inner tube, 13 is the end cover, 14 is the upper partition, 15 is the lower partition, 16 is the first electronic warehouse skeleton, 17 is the battery box, 18 is the second electronic warehouse skeleton, 19 is the support frame, 20 is the temperature and pressure processor, 21 is the drilling pressure and bending moment processor, 22 is the first mounting ring, 23 is the second mounting ring, 24 is the first elastic return member, 25 is the second elastic return member, 26 is the third mounting ring, 27 is the fourth mounting ring, 28 is the third elastic return member, 3. The embodiment of the present invention is characterized in that: 1. a first elastic reset member, 2. a fourth elastic reset member, 3. a charging and discharging module, 3. a second elastic reset member, 3. a first limiting sleeve, 3. a second limiting sleeve, 3. a fifth elastic reset member, 3. a third limiting sleeve, 3. a fourth limiting sleeve, 3. a sixth elastic reset member, 3. a second power generation module, 3. a shielding shell, 4. a magnetic box, 4. a shielding pad, 4. a rubber pad, 4. a magnet, 4. a power generation sheet, 4. a insulating sleeve, 4. a counterweight, 4. a lower buffer assembly, 4. a limiting column, 4. a ventilation column, 5. a seventh elastic reset member, 5. a ventilation hole, 5. a sealing tube, 5. a first sealing ring platform, 5. a second sealing ring platform, 5. a Peltier sheet, and 5. a thermal insulation layer. DETAILED DESCRIPTION

[0031] The present invention is not limited to the following embodiments, and specific implementation methods can be determined based on the technical solutions of the present invention and actual conditions.

[0032] In the present invention, for the convenience of description, the relative position relationship of each component is described based on the Figure 1 The positional relationships of front, back, top, bottom, left, and right are described in the layout of the manual. Figure 1 The layout direction is determined by the

[0033] The present invention will be further described below in conjunction with the embodiments and accompanying drawings: Example 1: As shown in the attached Figures 1 to 7As shown, the measurement while drilling short section includes an upper cover 1, a lower cover 2, a core tube 3, an outer tube 4, a drilling pressure torque and bending moment composite sensor 5, an internal temperature and pressure sensor 6, an external temperature and pressure sensor 7, a power generation unit, a processing unit and a storage unit 9. The core tube 3 is fixedly installed at the center of the lower side of the upper cover 1, and the lower end of the core tube 3 is fixedly installed. The outer tube 4 is provided on the outside of the core tube 3. The upper end of the outer tube 4 is sealed together with the upper cover 1, and the lower end of the outer tube 4 is sealed together with the lower cover 2. An annular installation cavity 8 is provided between the inner side of the outer tube 4 and the outer side of the core tube 3. Several drilling pressure torque and bending moment composite sensors 5 are evenly distributed along the circumference of the outer side of the lower part of the core tube 3. The core tube 3 Several first collection holes connected inside and outside are evenly distributed along the circumference on the inner side of the upper part. An internal temperature and pressure sensor 6 for collecting the temperature and pressure of the fluid in the core tube 3 is installed in each first collection hole. Several second collection holes connected inside and outside are evenly distributed along the circumference on the outer side of the outer tube 4. An external temperature and pressure sensor 7 for collecting the temperature and pressure of the fluid outside the outer tube 4 is installed in each second collection hole. A power generation unit, a processing unit and a storage unit 9 are provided in the installation cavity 8. The drilling pressure torque and bending moment composite sensor 5, the internal temperature and pressure sensor 6, and the external temperature and pressure sensor 7 are all connected to the processing unit, and the processing unit is respectively connected to the power generation unit and the storage unit 9.

[0034] According to the needs, the upper center of the upper cover 1 and the upper center of the lower cover 2 are provided with a flow hole that passes through from top to bottom, so that the fluid can flow through. The upper cover 1 and the core tube 3 are arranged as a whole, and the outer side of the lower end of the core tube 3 is sealed and fixed to the inner side of the upper end of the upper cover 1. Three drilling pressure torque and bending moment composite sensors 5 are evenly distributed along the circumference on the outer side of the lower part of the core tube 3. Three first collection holes that are connected inside and outside are evenly distributed along the circumference on the inner side of the upper part of the core tube 3. The outer side of the internal temperature and pressure sensor 6 is inserted into the inner sealing rubber ring and is interference-fitted with the first collection hole. Three second collection holes that are connected inside and outside are evenly distributed along the circumference on the outer side of the outer cylinder 4. The second collection holes correspond to the first collection holes one by one. 7 is inserted into the outer sealing rubber ring and has an interference fit with the second collection hole, which can ensure the sealing performance. The first collection hole and the second collection hole are both circular. The material of the outer cylinder 4 can be a well-known high-strength alloy, which can enhance the wear resistance and corrosion resistance. The internal temperature and pressure sensor 6 and the external temperature and pressure sensor 7 are designed with a sputtering film to integrate the collected temperature and annular pressure. At the same time, since the internal temperature and pressure sensor 6 and the external temperature and pressure sensor 7 are in direct contact with the mud, an anti-erosion design is adopted. The internal temperature and pressure sensor 6 and the external temperature and pressure sensor 7 can also be existing well-known technologies, such as the temperature and pressure sensors disclosed in the Chinese patent document with announcement number CN214066516U.

[0035] When in use, the measurement while drilling pup joint is installed near the drill bit. When drilling, the measurement while drilling pup joint can analyze, process and store the information collected in real time. The upper cover 1, the outer tube 4 and the lower cover 2 are fixed together by screw connection and sealing ring, which can prevent the upper cover 1, the outer tube 4 and the lower cover 2 from loosening due to vibration during the drilling process. Two sealing rings are provided at the connection between the upper cover 1, the outer tube 4 and the lower cover 2 to play a sealing role. In order to ensure the accurate measurement of bit pressure, bending moment and torque, the lower end of the core tube 3 is tightly fixed to the upper end of the lower cover 2 to prevent the gap at the connection between the lower end of the core tube 3 and the upper end of the lower cover 2 from causing measurement distortion. At the same time, a sealing ring is also provided at the connection to play a sealing role.

[0036] During the drilling process, the internal temperature and pressure sensor 6 and the external temperature and pressure sensor 7 collect temperature and annular pressure information, and then transmit it to the processing unit through a wire. The measurement while drilling short section of the present application has a built-in power generation unit, which can realize autonomous power generation. The processing unit can improve the processing power and store the temperature and annular pressure information in the storage unit 9 after processing. It can also use existing well-known technologies to process the temperature and annular pressure information and send it to the non-magnetic drill rod (not shown) in the drill rod. The non-magnetic drill rod will be further launched to the ground, thereby realizing the real-time transmission function of underground information. The power generation unit enables the measurement while drilling short section to have an autonomous endurance function, which can appropriately increase the transmission power of the processing unit and ensure the clarity and accuracy of the information.

[0037] During the drilling process, in order to monitor the drilling pressure, bending moment and torque information of the drilling in real time, a drilling pressure, torque and bending moment composite sensor 5 is installed at the lower part of the core tube 3. The drilling pressure, torque and bending moment composite sensor 5 also adopts a sputtering thin film design and is integrated. The drilling pressure, torque and bending moment composite sensor 5 can also be an existing well-known technology, such as a drilling pressure torque patch or a BSP00YC torque pressure sensor. During drilling, the WOB and drill pipe deformation will be transmitted to the MWD sub. By measuring the deformation of the core tube 3, the WOB, bending moment and torque information can be measured. The MWD sub is connected to the processing unit via a wire for real-time transmission of the collected information. The processing unit processes the drilling bending and torsion information and stores it in the storage unit 9. Alternatively, the WOB, bending moment and torque information can be processed and sent to a non-magnetic drill pipe (not shown) in the drill pipe using existing known technologies. The non-magnetic drill pipe will be further transmitted to the ground, thereby realizing the real-time transmission function of underground information. The power generation unit enables the MWD sub to have an autonomous endurance function, which can appropriately increase the transmission power of the processing unit and ensure the clarity and accuracy of the information.

[0038] The above-mentioned measurement while drilling sub can be further optimized and / or improved according to actual needs: Example 2: As an optimization of the above example, as shown in the attached Figures 1 to 8As shown, a casing 10 is provided in the installation cavity 8 corresponding to the position below the internal temperature and pressure sensor 6, which is sleeved on the outside of the core tube 3. A strip-shaped through-hole 11 is provided on the outside of the casing 10 corresponding to the position of the drilling pressure torque and bending moment composite sensor 5, which is connected inside and outside. An inner cylinder 12 is sleeved on the outside of the casing 10, and an end cover 13 is fixedly installed between the inner side of the lower end of the inner cylinder 12 and the outer side of the casing 10. An upper partition 14 and a lower partition 15 are installed at intervals between the inner side of the inner cylinder 12 and the outer side of the casing 10 at the position above the end cover 13. A first electronic warehouse frame 16 is provided between the upper side of the upper partition 14 and the inner side of the upper part of the inner cylinder 12. A battery box 17 is fixedly installed between the lower side of the upper partition 14 and the upper side of the lower partition 15. A second electronic storage frame 18 is fixedly mounted between the lower side of the housing 5 and the upper side of the end cap 13. A support frame 19 is provided between the second electronic storage frame 18 and the casing 10. The support frame 19 is fixedly mounted to the end of each weight-on-bit torque and bending moment composite sensor 5. The processing unit includes a temperature and pressure processor 20 fixedly mounted on the outside of the first electronic storage frame 16 and a weight-on-bit bending moment processor 21 fixedly mounted on the outside of the second electronic storage frame 18. The internal temperature and pressure sensor 6 and the external temperature and pressure sensor 7 are both connected to the temperature and pressure processor 20. The weight-on-bit torque and bending moment composite sensor 5 is connected to the weight-on-bit bending moment processor 21. The temperature and pressure processor 20 and the weight-on-bit bending moment processor 21 are both connected to the power generation unit and the storage unit 9.

[0039] According to requirements, the storage unit 9 can be installed on the outside of the first electronic warehouse skeleton 16 or on the outside of the second electronic warehouse skeleton 18. Three grooves are evenly distributed along the circumference on the outer side of the upper part of the core tube 3. One end of the drilling pressure torque and bending moment composite sensor 5 is installed in the groove, and the other end of the drilling pressure torque and bending moment composite sensor 5 is fixed together with the support frame 19 by screws. In this way, the support frame 19 connects the three drilling pressure torque and bending moment composite sensors 5 in pairs. The deformation of the core tube 3 will be collected by the drilling pressure torque and bending moment composite sensor 5. In this way, the drilling pressure, bending moment and torque information can be measured by measuring the deformation of the core tube 3. The temperature and pressure processor 20 and the drilling pressure and bending moment processor 21 transmit information separately without affecting each other. Even if one side has a problem, the other side can continue to work, ensuring the compatibility and fault tolerance of the drilling measurement short section.

[0040] Example 3: As an optimization of the above embodiment, as shown in the attached Figure 1 、 2As shown in Figure 3, a first mounting ring platform 22 is fixedly installed on the inner side of the upper part of the inner cylinder 12, and a first mounting ring groove with an opening downward is provided at the lower end of the first mounting ring platform 22. A second mounting ring platform 23 is fixedly installed on the upper side of the upper partition 14, and a second mounting ring groove with an opening upward is provided at the upper end of the second mounting ring platform 23. The outer side of the upper part of the first electronic warehouse frame 16 is sleeved in the first mounting ring groove, and a first elastic reset member 24 is sleeved in the first mounting ring groove at the upper end of the first electronic warehouse frame 16. The outer side of the lower part of the first electronic warehouse frame 16 is sleeved in the second mounting ring groove, and the lower end of the first electronic warehouse frame 16 is provided with a second elastic reset member 24 sleeved in the second mounting ring groove. Part 25, a third mounting ring platform 26 is fixedly installed on the lower side of the lower partition 15, and a third mounting ring groove with an opening downward is provided at the lower end of the third mounting ring platform 26, and a fourth mounting ring platform 27 is fixedly installed on the upper side of the end cover 13, and a fourth mounting ring groove with an opening upward is provided at the upper end of the fourth mounting ring platform 27, the upper outer side of the second electronic warehouse skeleton 18 is sleeved in the third mounting ring groove, and a third elastic reset component 28 is sleeved in the third mounting ring groove at the upper end of the second electronic warehouse skeleton 18, the lower outer side of the second electronic warehouse skeleton 18 is sleeved in the fourth mounting ring groove, and a fourth elastic reset component 29 is sleeved in the fourth mounting ring groove at the lower end of the second electronic warehouse skeleton 18.

[0041] As required, the first elastic return member 24, the second elastic return member 25, the third elastic return member 28, and the fourth elastic return member 29 are all conventionally known cylindrical compression springs. This arrangement reduces vibrations during drilling, preventing damage to the unit, module, and sensor, and ensuring the service life of the components.

[0042] Example 4: As an optimization of the above embodiment, as shown in the attached Figure 1 、 2As shown in FIG3 , two to four first collecting holes communicating with each other are evenly distributed along the circumference on the inner side of the core tube 3. A second collecting hole is provided on the outer side of the outer cylinder 4 corresponding to each first collecting hole position. At least two battery boxes 17 are distributed along the circumference between the upper partition 14 and the lower partition 15. The power generation unit includes a charging and discharging module 30, a power management module 31, a first power generation module and a second power generation module 38. The power management module 31 is provided in one of the battery boxes 17. The charging and discharging module 30 is provided in at least one of the battery boxes 17. The lower side of the upper cover 1 corresponding to the position above the inner cylinder 12 is provided along the circumference. At least one first power generation module is distributed in the partition, and at least one second power generation module 38 with the same structure as the first power generation module is provided on the upper side of the lower cover 2. The first power generation module and the second power generation module 38 are both connected to the power management module 31, and the power management module 31 is connected to the charge and discharge module 30. The charge and discharge module 30 is respectively connected to the temperature and pressure processor 20 and the drilling pressure and bending moment processor 21. A plurality of first threading holes are distributed at intervals along the circumference at the lower end of the upper partition 14, and a first limit sleeve 32 is fixedly installed on the lower side of the upper partition 14 corresponding to each first threading hole position. Each first limit sleeve The outer side of the lower part of the position sleeve 32 is covered with a second limiting sleeve 33, and each second limiting sleeve 33 is fixedly installed with the upper side of the battery box 17 at the corresponding position. The lower end of each first limiting sleeve 32 and the upper side of the battery box 17 at the corresponding position are provided with a fifth elastic reset member 34, and the upper side of each battery box 17 is provided with a second threading hole that corresponds to the first threading hole one by one and is connected inside and outside. The lower end of the lower partition 15 is distributed along the circumference with a plurality of third threading holes that pass through the upper and lower parts. The upper side of the lower partition 15 corresponding to each third threading hole position is fixedly installed with a third limiting sleeve 35, and each third limiting sleeve A fourth limiting sleeve 36 is provided on the outer side of the upper part of 35, and each fourth limiting sleeve 36 is fixedly installed together with the lower side of the battery box 17 at the corresponding position. A sixth elastic reset member 37 is provided on the upper end of each third limiting sleeve 35 and the lower side of the battery box 17 at the corresponding position. A fourth threading hole corresponding to the third threading hole and connected inside and outside is provided on the lower side of each battery box 17. Several upper buffer assemblies are evenly spaced along the circumference between the upper end of the inner cylinder 12 and the lower side of the upper cover 1, and a lower buffer assembly 47 with the same structure as the upper buffer assembly and symmetrical distribution is provided between the lower side of the end cover 13 and the upper side of the lower cover 2.

[0043] According to the requirements, three battery boxes 17 are distributed along the circumference between the upper partition 14 and the lower partition 15, and the battery boxes 17 are staggered with the first collection holes. Three through holes are evenly distributed on the upper side of the upper partition 14 and the lower partition 15. Three first threading holes are distributed on the upper side of the upper partition 14 between each two adjacent through holes. The second threading holes, the third threading holes and the fourth threading holes correspond to each other. Three temperature and pressure processors 20 are installed on the outside of the first electronic warehouse skeleton 16, and the three temperature and pressure processors 20 are connected by wires. Three drilling pressure and bending moment processors 21 are installed on the outside of the second electronic warehouse skeleton 18, and the drilling pressure and bending moment processors 21 are connected by wires.

[0044] A removable, sealed, and fixed box cover is installed on the outside of the battery box 17. Two of the three battery boxes 17 are used to install the charging and discharging modules 30, and the other battery box 17 has a three-layer structure. The power management module 31 includes filters and rectifiers installed in the upper two layers from top to bottom, and the bottom layer is installed with a counterweight. In order to dissipate heat from the battery box 17, rows of heat dissipation holes are provided on the outside of the two battery boxes 17 used to install the charging and discharging modules 30.

[0045] The fifth elastic return member 34 and the sixth elastic return member 37 are both existing well-known cylindrical compression springs. The fifth elastic return member 34 and the sixth elastic return member 37 can play a vibration reduction role again to prevent vibration from damaging the unit, module and sensor, thereby ensuring the service life of the parts.

[0046] Example 5: As an optimization of the above embodiment, as shown in the attached Figure 1 、 2 As shown in Figures 5, 9 and 10, the first power generation module includes a shielding shell 39, a magnetic box 40, a shielding pad 41, a rubber pad 42, a magnet 43, a power generation sheet 44 and an insulating sleeve 45. Several shielding shells 39 are distributed along the circumference on the lower side of the upper cover 1. The magnetic box 40 is fixedly installed in the shielding shell 39. The inner side of the upper part of the magnetic box 40 is provided with a shielding pad 41 and a rubber pad 42 from top to bottom. Two magnets 43 are provided on the inner side of the magnetic box 40 corresponding to the position below the rubber pad 42 from inside to outside. A power generation sheet 44 is provided between the two magnets 43. There is a spacing between the inner and outer sides of the power generation sheet 44 and the two magnets 43. When the power generation sheet 44 moves up and down relative to the magnet 43, it can output current to the power management module 31. The outer sides of the ends of the power generation sheet 44 are covered with insulating sleeves 45.

[0047] According to the requirements, the power generation sheet 44 is an existing well-known copper sheet. Three slots are evenly distributed along the circumference on the lower side of the upper cover 1. A rectangular ring groove is set on the bottom wall of each slot. The upper end of the magnetic box 40 is inserted into the rectangular ring groove, and then the shielding pad 41, rubber pad 42 and magnet 43 are placed in the magnetic box 40 in turn. Then, the shielding shell 39 is put on the outside of the magnetic box 40, and finally the shielding shell 39 is fixed to the upper cover 1 with self-locking screws.

[0048] The power generation sheet 44 of the first power generation module is connected to the power management module 31 (rectifier) ​​in the battery box 17 through a wire passing through the shielding shell 39, the lower side of the inner tube 12, the upper partition 14 and the inner side of the upper part of the battery box 17. The rectifier is connected to the filter through a wire, and the filter is connected to the charge and discharge module 30 in one of the battery boxes 17 through a wire. The power generation sheet 44 of the second power generation module 38 is connected to the power management module 31 (rectifier) ​​in the battery box 17 through a wire passing through the shielding shell 39, the upper side of the end cover 13, the lower partition 15 and the inner side of the lower part of the battery box 17. The rectifier is connected to the filter through a wire, and the filter is connected to the charge and discharge module 30 in another battery box 17 through a wire.

[0049] During the drilling process, the drill tool will continuously generate vibrations. In order to effectively reduce vibrations, the upper buffer assembly and the lower buffer assembly 47 can form a first layer of vibration reduction, greatly reducing the impact of vibrations on the modules in the inner tube 12. At the same time, in order to effectively utilize the energy of vibration, the back-and-forth vibration of the short section will cause the inner tube 12 to move up and down. The generator plate 44 fixedly connected to the power management module 31 in the inner tube 12 moves up and down relatively between the magnets 43. In this way, the generator plate 44 cuts the magnetic flux lines between the magnets 43 to generate current. The current enters the power management module 31 through the wire. The rectifier of the power management module 31 first integrates the current into a regular current suitable for charging. At the same time, the rectifier of the power management module 31 introduces the current into the filter of the power management module 31 through the wire for further processing. The current passing through the filter of the power management module 31 is then charged to the charge and discharge modules 30 (batteries) on both sides through the wire. In this way, the energy of vibration can be fully utilized to greatly improve the working time of the measurement while drilling short section.

[0050] The rubber pad 42 can prevent the magnet 43 from being magnetized after contacting the upper cover 1. The shielding pad 41 and the shielding shell 39 form a closed space, which can isolate the magnetic field and prevent the magnetic field of the magnet 43 from being affected by the downhole magnetic field. It can also prevent the magnetic field of the magnet 43 from affecting the collection and transmission of downhole information of the measurement while drilling short section.

[0051] Example 6: As an optimization of the above embodiment, as shown in the attached Figure 1 、 2 As shown in FIG. 3 , a counterweight 46 is provided in the battery box 17 .

[0052] During use, through such an arrangement, the balance of the measurement while drilling sub can be ensured during drilling. The counterweight 46 is fixed in the battery box 17 below the filter by screws to balance the center of gravity.

[0053] Example 7: As an optimization of the above embodiment, as shown in the attached Figure 1 、 2As shown in Figures 3 and 5, the upper buffer assembly includes a limiting column 48, a vent column 49 and a seventh elastic reset member 50. A plurality of air holes that pass through the upper and lower parts are distributed at intervals along the circumference on the upper end of the inner cylinder 12. A limiting column 48 with a hollow structure is fixedly installed on the upper end of the inner cylinder 12 corresponding to the position of each air hole 51. A vent column 49 with a tubular structure is mounted on the outer side of the upper part of each limiting column 48. A plurality of air holes 51 that are connected inside and outside are distributed at intervals along the circumference on the outer side of the vent column 49. A seventh elastic reset member 50 is provided between the limiting column 48 and the lower end of the upper cover 1.

[0054] According to the requirements, the seventh elastic reset member 50 is a conventionally known cylindrical compression spring, and the upper end of the inner cylinder 12 is provided with three vertically penetrating air holes evenly spaced along the circumference.

[0055] During the drilling process, the drill tool will continuously generate vibrations. In order to effectively reduce vibrations, the cooperation between the limit column 48, the vent column 49 and the seventh elastic return member 50 in the upper buffer assembly and the lower buffer assembly 47 can form the first vibration reduction, greatly reducing the impact of vibration on the module inside the inner tube 12.

[0056] During the drilling process, the seventh elastic return member 50 plays the first vibration reduction role, and the first elastic return member 24, the second elastic return member 25, the third elastic return member 28, the fourth elastic return member 29 and the fifth elastic return member 34, the sixth elastic return member 37 play the second vibration reduction role, respectively playing a secondary vibration reduction role on the temperature and pressure processor 20 on the first electronic warehouse frame 16 and the drilling pressure bending moment processor 21 on the second electronic warehouse frame 18, as well as the power generation unit and the storage unit 9, thereby reducing the damage caused by vibration to the parts and ensuring the service life of various parts.

[0057] Example 8: As an optimization of the above embodiment, as shown in the attached Figure 1 、 2 As shown in Figure 4, a sealing tube 52 is provided between the inner side of the outer tube 4 and the outer side of the inner tube 12. A first sealing ring groove and a second sealing ring groove with openings downward are provided on the lower side of the upper cover 1 from the inside to the outside. A third sealing ring groove and a fourth sealing ring groove with openings upward are provided on the upper side of the lower cover 2 from the inside to the outside. The outer side of the upper part of the sealing tube 52 is sealed and sleeved in the first sealing ring groove, and the outer side of the lower part of the sealing tube 52 is sealed and sleeved in the third sealing ring groove. A first sealing ring platform 53 is fixed to the upper end of the outer tube 4 and is sealed and sleeved in the second sealing ring groove. A second sealing ring platform 54 is fixed to the lower end of the outer tube 4 and is sealed and sleeved in the fourth sealing ring groove. A plurality of external mounting holes are distributed along the circumference of the outer side of the upper part and the outer side of the lower part of the outer tube 4, and the ends extend to the inner side of the sealing tube 52. A Peltier sheet 55 is sealed and fixedly installed in each external mounting hole. The Peltier sheet 55 is connected to the charge and discharge module 30.

[0058] According to the requirements, the outer side of the upper part and the outer side of the lower part of the outer cylinder 4 are both circumferentially spaced apart with three ends extending to the inner side of the sealing tube 52. The Peltier sheet 55 is a well-known technology in the existing art. The outer mounting hole is rectangular. The outer side of the Peltier sheet 55 is spaced apart along the circumference direction from the inside to the outside. There is a sealing ring in each sealing ring groove. After the Peltier sheet 55 is inserted into the sealing ring, it is interference fit with the outer mounting hole, so as to ensure the sealing while dissipating heat. The outer mounting hole and the second collection hole are staggered, that is, the outer mounting hole is arranged between two adjacent second collection holes. The Peltier sheet 55 and the charge and discharge module 30 form a loop to achieve a cooling effect. The inner surface of the sealing tube 52 is treated to ensure that it can absorb a certain amount of moisture even in the event of water ingress, thereby ensuring the normal operation of the measurement while drilling short section.

[0059] Two sealing rings are provided at the connection between the upper cover 1, the outer cylinder 4 and the lower cover 2, which play the role of the first sealing. A sealing ring is also provided between the sealing tube 52 and the upper cover 1 and the lower cover 2, which plays the role of the second sealing.

[0060] When the Peltier chip 55 is working, the inside is cooled to reduce the temperature of the mounting cavity 8 in the sealed tube 52. At the same time, the outside is heated to allow the drilling fluid to take away the heat, ensuring that the units in the measurement while drilling short section can work normally within the allowable temperature range. In this way, during the drilling process, as the depth increases, the temperature will continue to increase. As the temperature gradually rises, the units in the measurement while drilling short section can be prevented from gradually failing.

[0061] Example 9: As an optimization of the above embodiment, as shown in the attached Figure 1 、 4 As shown in Figures 5, 6 and 11, an inner ring groove is provided on the inner side of the middle of the outer cylinder 4, and an annular heat-insulating cavity is formed between the inner ring groove and the sealing tube 52, and a heat-insulating layer 56 is provided in the heat-insulating cavity.

[0062] According to the requirements, the thermal insulation layer 56 is formed by thermal insulation cotton arranged in the thermal insulation cavity. Three connecting blocks are fixedly installed at the upper and lower ends of the thermal insulation cotton along the circumference. Each connecting block is fixedly installed with the sealing tube 52. The thermal insulation cotton is located in the annular space inside the outer tube. The sealing tube 52 fits tightly with the inner wall of the outer tube 4 and the inner side of the thermal insulation layer 56. The inner side of the outer tube 4 can also ensure the contact area with the sealing tube 52 to improve the sealing performance. This can ensure that the thermal insulation layer 56 is not affected. An insulating layer 56 is provided in the interlayer between the outer tube 4 and the sealing tube 52 to isolate most of the external heat and play a heat-insulating role. In addition, the Peltier chip 55 performs cooling on the inside during operation to reduce the temperature of the mounting cavity 8 in the sealing tube 52. At the same time, heating is performed on the outside to allow the drilling fluid to take away the heat, thereby ensuring that the units in the measurement while drilling short section can operate normally within the allowable temperature range. At the same time, through holes are provided on the upper side of the inner tube 12, the lower side of the end cover 13, the upper side of the upper partition 14, the upper side of the lower partition 15, and the outer side of the battery box 17. This ensures the flow of temperature, prevents uneven cooling, and can fully realize the cooling effect of components. In this way, during the drilling process, as the depth increases, the temperature will continue to increase. As the temperature gradually rises, the gradual failure of the units in the measurement while drilling short section can be effectively prevented.

[0063] A vibration sensor may be added to the measurement while drilling sub of the present application as needed to measure the vibration frequency of the measurement while drilling sub.

[0064] The measurement while drilling short section of the present application can simultaneously realize the collection, transmission and storage of multiple types of information, and is equipped with multiple sealing measures, a unique charging mechanism and a refrigeration device (Peltier chip 55), which can greatly extend the downhole working time without having to repeatedly lift the drill. The refrigeration device can prevent the unit module from failing due to high temperature or causing information deviation. The multi-chip system works independently to improve the tool's fault tolerance. The magnetic field shielding system ensures the accuracy of information transmission. Multi-point information collection prevents errors in single information collection and improves information accuracy. The measurement while drilling short section of the present application has an ingenious structure. Through structural reform and innovation, it greatly improves the fault tolerance, while extending the service life and reducing drilling costs.

[0065] The above technical features respectively constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or removed according to actual needs to meet the requirements of different situations.

Claims

1. A measurement while drilling sub, characterized in that It includes an upper cover, a lower cover, a core tube, an outer tube, a drilling pressure torque and bending moment composite sensor, an internal temperature and pressure sensor, an external temperature and pressure sensor, a power generation unit, a processing unit and a storage unit. A core tube is fixedly installed at the center of the lower side of the upper cover, a lower cover is fixedly installed at the lower end of the core tube, an outer tube is provided on the outside of the core tube, the upper end of the outer tube is sealed together with the upper cover, the lower end of the outer tube is sealed together with the lower cover, an annular installation cavity is provided between the inner side of the outer tube and the outer side of the core tube, a number of drilling pressure torque and bending moment composite sensors are evenly spaced along the circumference of the outer side of the lower part of the core tube, and a number of drilling pressure torque and bending moment composite sensors are evenly spaced along the circumference of the inner side of the upper part of the core tube. There are several first collection holes connected inside and outside, and each first collection hole is installed with an internal temperature and pressure sensor for collecting the temperature and pressure of the fluid in the core tube. Several second collection holes connected inside and outside are evenly spaced along the circumference of the outer side of the outer tube, and each second collection hole is installed with an external temperature and pressure sensor for collecting the temperature and pressure of the fluid outside the outer tube. A power generation unit, a processing unit and a storage unit are arranged in the installation cavity. The drilling pressure torque and bending moment composite sensor, the internal temperature and pressure sensor, and the external temperature and pressure sensor are all connected to the processing unit, and the processing unit is respectively connected to the power generation unit and the storage unit.

2. The measurement while drilling sub according to claim 1, characterized in that A casing is provided in the installation cavity corresponding to the position below the internal temperature and pressure sensor, which is sleeved on the outside of the core tube. A strip-shaped through-hole is provided on the outside of the casing corresponding to the position of the drilling pressure torque and bending moment composite sensor. An inner tube is sleeved on the outside of the casing, and an end cover is fixedly installed between the inner side of the lower end of the inner tube and the outer side of the casing. An upper partition and a lower partition are installed at intervals between the inner side of the inner tube and the outer side of the casing at the position above the end cover. A first electronic warehouse frame is provided between the upper side of the upper partition and the inner side of the upper part of the inner tube, a battery box is fixedly installed between the lower side of the upper partition and the upper side of the lower partition, and the lower side of the lower partition is fixedly installed between the upper side of the end cover and the upper side of the end cover. A second electronic warehouse frame is fixedly installed between the sides, and a support frame is provided between the second electronic warehouse frame and the casing. The support frame is fixedly installed together with the end of each drilling pressure torque and bending moment composite sensor. The processing unit includes a temperature and pressure processor fixedly installed on the outside of the first electronic warehouse frame and a drilling pressure and bending moment processor fixedly installed on the outside of the second electronic warehouse frame. The internal temperature and pressure sensor and the external temperature and pressure sensor are both connected to the temperature and pressure processor, the drilling pressure torque and bending moment composite sensor is connected to the drilling pressure and bending moment processor, and the temperature and pressure processor and the drilling pressure and bending moment processor are both connected to the power generation unit and the storage unit.

3. The measurement while drilling sub according to claim 2, characterized in that A first mounting ring platform is fixedly installed on the inner side of the upper part of the inner cylinder, and a first mounting ring groove with an opening downward is provided at the lower end of the first mounting ring platform. A second mounting ring platform is fixedly installed on the upper side of the upper partition plate, and a second mounting ring groove with an opening upward is provided at the upper end of the second mounting ring platform. The outer side of the upper part of the first electronic warehouse frame is sleeved in the first mounting ring groove, and the upper end of the first electronic warehouse frame is provided with a first elastic reset component sleeved in the first mounting ring groove. The outer side of the lower part of the first electronic warehouse frame is sleeved in the second mounting ring groove, and the lower end of the first electronic warehouse frame is provided with a second elastic reset component sleeved in the second mounting ring groove. A third mounting ring platform is fixedly installed on the lower side of the lower partition plate, and the lower end of the third mounting ring platform is provided with a third mounting ring groove with an opening downward. A fourth mounting ring platform is fixedly installed on the upper side of the end cover, and the upper end of the fourth mounting ring platform is provided with a fourth mounting ring groove with an opening upward. The outer side of the upper part of the second electronic warehouse frame is sleeved in the third mounting ring groove, and the upper end of the second electronic warehouse frame is provided with a third elastic reset component sleeved in the third mounting ring groove. The outer side of the lower part of the second electronic warehouse frame is sleeved in the fourth mounting ring groove, and the lower end of the second electronic warehouse frame is provided with a fourth elastic reset component sleeved in the fourth mounting ring groove.

4. The measurement while drilling sub according to claim 2 or 3, characterized in that Two to four first collecting holes connected inside and outside are evenly distributed along the circumference on the inner side of the core tube, and a second collecting hole is provided on the outer side of the outer cylinder corresponding to each first collecting hole position. At least two battery boxes are distributed along the circumference between the upper partition and the lower partition, and the power generation unit includes a charging and discharging module, a power management module, a first power generation module and a second power generation module. One of the battery boxes is provided with a power management module, and at least one battery box is provided with a charging and discharging module. At least one first power generation module is distributed along the circumference on the lower side of the upper cover corresponding to the position above the inner cylinder, and at least one second power generation module with the same structure as the first power generation module is provided on the upper side of the lower cover. The first power generation module and the second power generation module are both connected to the power management module, and the power management module is connected to the charging and discharging module. The charging and discharging modules are respectively connected to the temperature and pressure processor and the drilling pressure and bending moment processor. A number of first threading holes that pass through the upper and lower ends are distributed along the circumference at intervals, and a first limiting sleeve is fixedly installed on the lower side of the upper partition corresponding to each first threading hole position, and the lower part of each first limiting sleeve The outer side is provided with a second limit sleeve, and each second limit sleeve is fixedly installed together with the upper side of the battery box at the corresponding position, and each first limit sleeve has a lower end and a fifth elastic reset piece on the upper side of the battery box at the corresponding position, and each battery box has a second elastic reset piece on the lower end, and each battery box has a second elastic reset piece on the lower end, and each battery box has a second elastic reset piece on the lower end, and each battery box has a second elastic reset piece on the lower end, and each battery box has a second elastic reset piece on the lower end, and each battery box has a second elastic reset piece on the lower end, and each battery box has a second elastic reset piece on the lower end, and each battery box has a fourth ...

5. The measurement while drilling sub according to claim 4, characterized in that The first power generation module includes a shielding shell, a magnetic box, a shielding pad, a rubber pad, a magnet, a power generation sheet and an insulating sleeve. Several shielding shells are distributed along the circumference on the lower side of the upper cover. The magnetic box is fixedly installed in the shielding shell. The inner side of the upper part of the magnetic box is provided with a shielding pad and a rubber pad from top to bottom. Two magnets are provided on the inner side of the magnetic box corresponding to the position below the rubber pad from inside to outside. A power generation sheet is provided between the two magnets. There is a gap between the inner and outer sides of the power generation sheet and the two magnets. When the power generation sheet moves up and down relative to the magnet, it can output current to the power management module. The outer sides of the ends of the power generation sheet are each covered with an insulating sleeve.

6. The measurement while drilling sub according to claim 4, characterized in that The upper buffer assembly includes a limit column, a vent column and a seventh elastic reset member. The upper end of the inner cylinder is provided with a plurality of vertically extending vent holes distributed at intervals along the circumference. A hollow limit column is fixedly installed on the upper end of the inner cylinder corresponding to the position of each vent hole. A tubular vent column is sheathed on the outer side of the upper part of each limit column. A plurality of internally and externally communicating vent holes are distributed at intervals along the circumference on the outer side of the vent column. A seventh elastic reset member is provided between the limit column and the lower end of the upper cover. Or / and, a counterweight is provided in the battery box.

7. The measurement while drilling sub according to claim 5, characterized in that The upper buffer assembly includes a limit column, a vent column and a seventh elastic reset member. The upper end of the inner cylinder is provided with a plurality of vertically extending vent holes distributed at intervals along the circumference. A hollow limit column is fixedly installed on the upper end of the inner cylinder corresponding to the position of each vent hole. A tubular vent column is sheathed on the outer side of the upper part of each limit column. A plurality of internally and externally communicating vent holes are distributed at intervals along the circumference on the outer side of the vent column. A seventh elastic reset member is provided between the limit column and the lower end of the upper cover. Or / and, a counterweight is provided in the battery box.

8. The measurement while drilling sub according to claim 4, characterized in that A sealing tube is provided between the inner side of the outer tube and the outer side of the inner tube, a first sealing ring groove and a second sealing ring groove with openings downward are provided on the lower side of the upper cover from the inside to the outside, a third sealing ring groove and a fourth sealing ring groove with openings upward are provided on the upper side of the lower cover from the inside to the outside, the outer side of the upper part of the sealing tube is sealingly sleeved in the first sealing ring groove, and the outer side of the lower part of the sealing tube is sealingly sleeved in the third sealing ring groove, the upper end of the outer tube is fixed with a first sealing ring platform sealingly sleeved in the second sealing ring groove, and the lower end of the outer tube is fixed with a second sealing ring platform sealingly sleeved in the fourth sealing ring groove, a number of external mounting holes are distributed along the circumference on the outer sides of the upper and lower parts of the outer tube and extend to the inner side of the sealing tube, a Peltier sheet is sealingly and fixedly installed in each external mounting hole, and the Peltier sheet is connected to the charge and discharge module.

9. The measurement while drilling sub according to claim 5, 6 or 7, characterized in that A sealing tube is provided between the inner side of the outer tube and the outer side of the inner tube, a first sealing ring groove and a second sealing ring groove with openings downward are provided on the lower side of the upper cover from the inside to the outside, a third sealing ring groove and a fourth sealing ring groove with openings upward are provided on the upper side of the lower cover from the inside to the outside, the outer side of the upper part of the sealing tube is sealingly sleeved in the first sealing ring groove, and the outer side of the lower part of the sealing tube is sealingly sleeved in the third sealing ring groove, the upper end of the outer tube is fixed with a first sealing ring platform sealingly sleeved in the second sealing ring groove, and the lower end of the outer tube is fixed with a second sealing ring platform sealingly sleeved in the fourth sealing ring groove, a number of external mounting holes are distributed along the circumference on the outer sides of the upper and lower parts of the outer tube and extend to the inner side of the sealing tube, a Peltier sheet is sealingly and fixedly installed in each external mounting hole, and the Peltier sheet is connected to the charge and discharge module.

10. The measurement while drilling sub according to claim 8, characterized in that An inner ring groove is provided on the inner side of the middle part of the outer cylinder, and an annular heat-insulating cavity is formed between the inner ring groove and the sealing tube, and a heat-insulating layer is provided in the heat-insulating cavity.

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