Downhole drilling pressure torque measurement tool

Abstract

The present invention discloses a downhole drilling pressure torque measuring tool, including a drill collar short section, a strain gauge, a control device and a drilling pressure torque data acquisition and control short section; a first mounting groove and a second mounting groove are respectively provided on the side wall of the drill collar short section, the strain gauge and the control device are respectively packaged in the first mounting groove and the second mounting groove, and the strain gauge and the groove wall of the first mounting groove are interference fit; the drilling pressure torque data acquisition and control short section is installed in the drill collar short section; the strain gauge is connected to the control device signal, and can transmit the measured torque signal to the control device, and the control device is used to process the torque signal; the drilling pressure torque data acquisition and control short section is connected to the control device signal, and is used to store and receive the processed data signal transmitted by the control device. In the present invention, since the strain gauge is packaged in the first mounting groove provided on the drill collar short section, the external mud is prevented from affecting the measurement accuracy of the strain gauge, and the measurement accuracy of the drilling pressure torque is improved.

Description

Technical Field

[0001] The invention relates to the technical field of downhole strain measurement in oil drilling, and in particular to a downhole drilling pressure torque measurement tool. Background Art

[0002] With the rapid development of the oil and gas industry and the continuous deepening of oil exploration and development, the underground formation structure is becoming more and more complex, and there are more and more deep wells, high-temperature and high-pressure wells, large-displacement wells, long-horizontal-section horizontal wells and other special process wells, and the incidence of underground accidents and complex situations is also increasing.

[0003] The measurement of drilling pressure can predict the deflection ability of drilling tools, thereby controlling the drilling trajectory. At present, drilling pressure measurement mainly relies on the drilling pressure data displayed by the drilling platform to judge the downhole conditions, but due to the influence of factors such as friction, drill string force, wellbore constraints, and drilling fluid adhesion, there is a certain deviation between the ground measurement and the actual downhole situation, which not only affects the wellbore quality, but also affects the safe use of drilling tools.

[0004] Therefore, how to improve the measurement accuracy of drilling pressure torque is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a downhole WOB torque measuring tool, which can improve the measurement accuracy of the WOB torque.

[0006] In order to achieve the above object, the present invention provides the following scheme:

[0007] A downhole drilling pressure torque measuring tool, comprising a drill collar short section, a strain measuring instrument, a control device and a drilling pressure torque data acquisition and control short section;

[0008] A first mounting groove and a second mounting groove are respectively provided on the side wall of the drill collar short section, the strain measuring instrument and the control device are respectively packaged in the first mounting groove and the second mounting groove, and the strain measuring instrument is interference fit with the groove wall of the first mounting groove;

[0009] The drilling pressure torque data acquisition and control short section is installed in the drill collar short section;

[0010] The strain gauge is signal-connected to the control device and can transmit the measured torque signal to the control device, and the control device is used to process the torque signal;

[0011] The drilling pressure torque data acquisition and control sub is connected to the control device signal, and is used to store and receive the processed data signal transmitted by the control device.

[0012] In a specific embodiment, the strain gauge includes a cylindrical body, a substrate, and a plurality of strain gauge assemblies;

[0013] The base plate is arranged at the bottom end of the cylindrical body, and the base plate is interference-engaged with the groove wall of the first installation groove;

[0014] The strain gauge components are sequentially pasted on the substrate.

[0015] In another specific embodiment, the substrate is made of ceramic;

[0016] and / or

[0017] The strain gauge assembly includes a four-arm bridge circuit and a plurality of strain gauges integrated and mounted on each arm of the bridge circuit;

[0018] and / or

[0019] The interference fit between the strain gauge and the first mounting groove is greater than or equal to 0.03 mm and less than or equal to 0.04 mm;

[0020] and / or

[0021] A pressure sensing patch is installed around the matching position between the strain gauge and the first mounting groove;

[0022] and / or

[0023] The number of the strain gauges and the first installation slots is equal, both greater than or equal to 2, and are installed one-to-one.

[0024] When the number of the strain gauges and the number of the first mounting grooves are both 2, the two first mounting grooves are respectively placed on both sides of the second mounting groove and are respectively arranged at a 90° interval from the second mounting groove.

[0025] In another specific embodiment, the control device includes a control circuit board and a Bluetooth board;

[0026] The control circuit board is connected to the strain gauge signal, and is used to receive the torque signal measured by the strain gauge, and process the torque signal;

[0027] The Bluetooth board is respectively connected to the control circuit board and the drilling pressure torque data acquisition and control short section signal, and is used to transmit the data signal processed by the control circuit board to the drilling pressure torque data acquisition and control short section for storage, and can transmit the data stored in the drilling pressure torque data acquisition and control short section after the torque measurement is completed.

[0028] In another specific embodiment, the control device further comprises a through-line pressure-bearing plug;

[0029] The wire-passing pressure-bearing plug is fixedly installed in the second installation groove, and the control circuit board and the Bluetooth board are installed in the wire-passing pressure-bearing plug;

[0030] The first mounting slot and the second mounting slot are connected via a connecting hole, and the connecting hole is used for a wire electrically connecting the control circuit board and the strain gauge to pass through.

[0031] In another specific embodiment, the bit pressure torque data acquisition and control sub includes a closed shell and a sub circuit board;

[0032] The bottom of the second mounting groove is in communication with the inner cavity of the drill collar sub;

[0033] A protrusion is provided on the side wall of the closed shell, and the protrusion extends from the bottom of the second mounting groove into the second mounting groove. A mounting hole communicating with the inner cavity of the closed shell is opened on the protrusion, and the wire pressure plug is connected to the mounting hole.

[0034] In another specific embodiment, the mounting hole is a threaded hole, and the wire-passing pressure-bearing plug is threadedly connected to the mounting hole;

[0035] and / or

[0036] The closed housing includes a convex circuit connector, a pressure-bearing cylinder, an upper plug and a lower plug;

[0037] The raised portion is arranged on the hollow convex circuit connector, the upper plug is sealedly connected to the top end of the convex circuit connector, the top end of the pressure-bearing cylinder is sealedly connected to the bottom end of the convex circuit connector, and the bottom end of the pressure-bearing cylinder is sealedly connected to the lower plug.

[0038] In another specific embodiment, the drilling pressure torque data acquisition and control sub also includes a circuit board skeleton;

[0039] The circuit board frame is installed in the pressure-bearing cylinder, and the short-section circuit board is embedded in the circuit board frame by organic hard silicone potting;

[0040] and / or

[0041] The drilling pressure torque data acquisition and control pup joint also includes a battery assembly, which is filled in the pressure-bearing cylinder through organic silica gel and is electrically connected to the pup joint circuit board to supply power to the pup joint circuit board.

[0042] In another specific embodiment, the drilling pressure torque data acquisition and control sub also includes a shock absorbing structural member, a threaded pressing block and a concave pressing block;

[0043] The shock absorbing structural member is connected to the inner wall of the convex circuit connector, and the threaded pressing block is connected to the convex circuit connector;

[0044] The bottom end of the shock absorbing structure is connected to the top end of the threaded pressing block, and the top end of the concave pressing block is connected to the bottom end of the threaded pressing block;

[0045] The top end of the circuit board frame is connected to the bottom end of the concave pressing block.

[0046] In another specific embodiment, the downhole weight-on-bit torque measurement tool further comprises a centralizer;

[0047] The centralizer is located in the closed shell, and the centralizer is installed at the bottom end of the pressure cylinder.

[0048] The various embodiments according to the present invention can be arbitrarily combined as needed, and the embodiments obtained after these combinations are also within the scope of the present invention and are part of the specific implementation methods of the present invention.

[0049] Without being limited to any theory, it can be seen from the above disclosure that when the downhole drilling pressure torque measuring tool disclosed by the present invention is used, the strain gauge transmits the measured torque signal to the control device, the control device iteratively processes the received torque signal, and transmits the processed data signal to the drilling pressure torque data acquisition and control short section, and the drilling pressure torque data acquisition and control short section stores all data until the measurement is completed. In the present invention, since the strain gauge is encapsulated in the first installation groove opened on the drill collar short section, the external mud is prevented from affecting the measurement accuracy of the strain gauge, and the measurement accuracy of the drilling pressure torque is improved.

[0050] In addition, the control device is encapsulated in the second installation groove of the drill collar short section, which prevents mud from penetrating and damaging the control device. The strain gauge is interference-fitted with the groove wall of the first installation groove, which prevents excessive damage to the structure of the drill collar short section. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0052] Figure 1 A schematic diagram of the structure of a downhole drilling pressure torque measurement tool provided by the present invention;

[0053] Figure 2 for Figure 1 BB cross-sectional structure diagram;

[0054] Figure 3 for Figure 1 AA cross-sectional structural diagram;

[0055] Figure 4 A schematic diagram of the structure of the convex circuit connector provided by the present invention;

[0056] Figure 5 This is a schematic structural diagram of the strain gauge assembly provided by the present invention.

[0057] in, Figure 1-5 middle:

[0058] Drill collar pup joint 1, strain measuring instrument 2, control device 3, drilling pressure torque data acquisition and control pup joint 4, first mounting groove 101, second mounting groove 102, cylindrical body 201, substrate 202, strain gauge assembly 203, control circuit board 301, Bluetooth board 302, over-line pressure plug 303, pup joint circuit board 401, convex circuit connector 402, pressure cylinder 403, upper plug 404, lower plug 405, circuit board skeleton 406, battery assembly 407, shock absorbing structural member 408, threaded pressure block 409, concave pressure block 410, centralizer 5, first sealing plug 6, second sealing plug 7. DETAILED DESCRIPTION

[0059] The following will be combined with the attached embodiment of the present invention Figure 1-5 , clearly and completely describe the technical solutions in the embodiments of the present invention. The present invention can be implemented in many different forms and is not limited to the implementation methods described in this embodiment. The purpose of providing the following specific implementation methods is to facilitate a clearer and more thorough understanding of the disclosure of the present invention, wherein the words indicating directions such as below refer only to the position of the structure shown in the corresponding drawings.

[0060] It is understood that the terms used herein are only for describing specific embodiments and are not intended to limit the present invention. When used herein, the singular forms "a" and "" are also intended to include the plural forms unless the context clearly states otherwise. Further, when used in this specification, the terms "include" and / or "comprise" indicate the presence of features, wholes, steps, elements and / or components, but do not exclude the presence or increase of one or more other features, wholes, steps, elements, components and / or combinations thereof. The subsequent description of the specification is a preferred embodiment of the present invention, but the description is for the purpose of illustrating the general principles of the present invention and is not intended to limit the scope of the present invention. The scope of protection of the present invention shall be determined by the appended claims.

[0061] like Figure 1-5As shown, the present invention discloses a downhole WOB torque measuring tool, wherein the downhole WOB torque measuring tool comprises a drill collar short section 1, a strain gauge 2, a control device 3 and a WOB torque data acquisition and control short section 4.

[0062] Specifically, the drill collar short section 1 is a non-magnetic drill collar short section 1, and threaded holes are respectively provided at both ends of the drill collar short section 1 to facilitate connection with a drill string or other downhole tools.

[0063] A first mounting groove 101 and a second mounting groove 102 are respectively provided on the side wall of the drill collar sub 1, and the strain gauge 2 and the control device 3 are respectively packaged in the first mounting groove 101 and the second mounting groove 102. Specifically, the first mounting groove 101 seals the strain gauge 2 in the first mounting groove 101 through the first sealing plug 6, and the second mounting groove 102 seals the control device 3 in the second mounting groove 102 through the second sealing plug 7. The first sealing plug 6 and the second sealing plug 7 are detachably and hermetically connected to the top of the first mounting groove 101 and the top of the second mounting groove 102, respectively, so as to facilitate the replacement of the first sealing plug 6 and the second sealing plug 7.

[0064] It should be noted that the shapes of the first installation groove 101 and the second installation groove 102 are not limited, and can be circular grooves or square grooves, etc. In this embodiment, the first installation groove 101 and the second installation groove 102 are both circular grooves. Correspondingly, the first sealing plug 6 and the second sealing plug 7 are both circular sealing plugs.

[0065] The strain gauge 2 is interference fit with the groove wall of the first installation groove 101. Specifically, the strain gauge 2 integrates multiple strain gauges, which reduces the impact on the structural strength of the drill collar sub 1 caused by installing a single strain gauge on the drill collar sub 1.

[0066] The drilling pressure torque data acquisition and control sub 4 is installed in the drill collar sub 1, and the strain gauge 2 is connected to the control device 3 by signal, and can transmit the measured torque signal to the control device 3, and the control device 3 is used to process the torque signal. The drilling pressure torque data acquisition and control sub 4 is connected to the control device 3 by signal, and is used to store and receive the processed data signal transmitted by the control device 3.

[0067] The downhole drilling pressure torque measuring tool disclosed in the present invention, when in use, the strain gauge 2 transmits the measured torque signal to the control device 3, the control device 3 iteratively processes the received torque signal, and transmits the processed data signal to the drilling pressure torque data acquisition and control sub 4, and the drilling pressure torque data acquisition and control sub 4 stores all the data until the measurement is completed. In the present invention, since the strain gauge 2 is encapsulated in the first installation groove 101 opened on the drill collar sub 1, the external mud is prevented from affecting the measurement accuracy of the strain gauge 2, and the measurement accuracy of the drilling pressure torque is improved.

[0068] In addition, the control device 3 is encapsulated in the second installation groove 102 of the drill collar sub 1, which prevents mud from penetrating and damaging the control device 3. The strain gauge 2 is interference fit with the groove wall of the first installation groove 101, which prevents excessive damage to the structure of the drill collar sub 1.

[0069] In some of the embodiments, the strain gauge 2 includes a cylindrical body 201, a substrate 202 and a plurality of strain gauge assemblies 203. The substrate 202 is disposed at the bottom end of the cylindrical body 201, and the substrate 202 is interference-engaged in the groove wall of the first mounting groove 101, and the strain gauge assemblies 203 are sequentially pasted on the substrate 202.

[0070] It should be noted that the substrate 202 is made of a material with good heat dissipation and is not easily deformed in a high temperature environment. For example, the substrate 202 is made of ceramic or other ceramic materials. The strain gauge assemblies 203 are sequentially pasted on the substrate 202. The number of strain gauge assemblies 203 is not limited. In this embodiment, the strain gauge assembly on each strain gauge 2 is 8 groups as an example. Two groups are set at a position perpendicular to the axis of the drill collar short section 1, two groups are set at a position parallel to the axis of the drill collar short section 1, two groups are set at a position at a 45° angle to the axis of the drill collar short section 1, and the last two groups are set at a position at a 135° angle to the axis of the drill collar short section 1. Figure 5 The downhole drilling pressure is measured by a strain gauge assembly 203 which is arranged vertically and horizontally with the axis of the drill collar sub 1.

[0071] In some embodiments, the present invention discloses that the strain gauge assembly 203 includes a four-arm bridge circuit and a plurality of strain gauges integrated on each arm of the bridge circuit, which is used to compensate for downhole drilling pressure measurement errors.

[0072] Furthermore, the present invention discloses that the number of strain gauges 2 and first mounting slots 101 is equal, both greater than or equal to 2, and are installed one-to-one, so that the control device 3 collects torque signals of at least two strain gauges 2, facilitates comparison and correction, and further improves the accuracy of torque measurement.

[0073] When the number of the strain gauges 2 and the number of the first mounting slots 101 are both 2, the two first mounting slots 101 are respectively placed on both sides of the second mounting slot 102 and are respectively spaced 90° apart from the second mounting slot 102. Figure 3 shown.

[0074] Furthermore, the present invention discloses that the interference fit between the strain gauge 2 and the first mounting groove 101 is greater than or equal to 0.03 mm and less than or equal to 0.04 mm. The inventor of the present invention has conducted many creative experiments and found that within this range, the strain gauge 2 is easy to install and the contact surface will not be strained during disassembly.

[0075] In order to effectively prevent the strain gauge 2 from shifting in a harsh underground environment, the present invention discloses that a pressure sensing patch is installed around the matching position between the strain gauge 2 and the first installation groove 101 .

[0076] In some embodiments, the present invention specifically discloses that the control device 3 includes a control circuit board 301 and a Bluetooth board 302. Specifically, the control circuit board 301 and the Bluetooth board 302 are sealed with sealant on their exteriors. The control circuit board 301 is signal-connected to the strain gauge 2 to receive the torque signal measured by the strain gauge 2 and process the torque signal.

[0077] The Bluetooth board 302 is respectively connected to the control circuit board 301 and the drilling pressure torque data acquisition and control sub 4 by signal, and is used to transmit the data signal processed by the control circuit board 301 to the drilling pressure torque data acquisition and control sub 4 for storage, and can transmit the data stored in the drilling pressure torque data acquisition and control sub 4 after the torque measurement is completed. Specifically, when in use, the Bluetooth board 302 can be connected to the ground control system through the ground interface box and the Bluetooth board 302 signal, so as to receive the data stored in the drilling pressure torque data acquisition and control sub 4 transmitted by the Bluetooth board 302.

[0078] Furthermore, the control device 3 also includes a wire-passing pressure-bearing plug 303 , which is fixedly installed in the second installation groove 102 , and the control circuit board 301 and the Bluetooth board 302 are installed in the wire-passing pressure-bearing plug 303 .

[0079] The first installation slot 101 and the second installation slot 102 are connected via a connection hole, and the connection hole is used for passing a wire electrically connecting the control circuit board 301 and the strain gauge 2 .

[0080] In some embodiments, the drilling pressure torque data acquisition and control short section 4 includes a closed shell and a short section circuit board 401, the bottom of the second mounting groove 102 is connected to the inner cavity of the drill collar short section 1, and a protrusion is provided on the side wall of the closed shell. The protrusion extends from the bottom of the second mounting groove 102 into the second mounting groove 102, and a mounting hole connected to the inner cavity of the closed shell is opened on the protrusion, and the wire pressure plug 303 is connected to the mounting hole.

[0081] Specifically, the mounting hole is a threaded hole, and the wire-passing pressure-bearing plug 303 is threadedly connected to the mounting hole, which is convenient for disassembly and installation. It should be noted that the mounting hole can also be snap-connected with the wire-passing pressure-bearing plug 303, etc.

[0082] Furthermore, the present invention specifically discloses that the closed shell includes a convex circuit connector 402 , a pressure-bearing cylinder 403 , an upper plug 404 and a lower plug 405 .

[0083] The raised portion is arranged on the hollow convex circuit connector 402 , and the convex circuit connector 402 connects the drilling pressure torque data acquisition and control short section 4 with the drill collar short section 1 in contact through the through-line pressure-bearing plug 303 .

[0084] The upper plug 404 is sealed and connected to the top of the convex circuit connector 402, specifically, the upper plug 404 is threadedly connected to the top of the convex circuit connector 402. The top of the pressure-bearing cylinder 403 is sealed and connected to the bottom of the convex circuit connector 402, and the bottom of the pressure-bearing cylinder 403 is sealed and connected to the lower plug 405, specifically, the bottom of the pressure-bearing cylinder 403 is threadedly connected to the lower plug 405. The closed shell forms a closed space to protect the internal short-section circuit board 401 from being damaged by the high-temperature and high-pressure drilling fluid environment underground.

[0085] Specifically, the inner cavity of the convex circuit connector 402 is cylindrical, and the surface of the convex circuit connector 402 is arc-shaped, which fits the inner wall of the drill collar short section 1, and the two ends are processed with transition arcs to effectively avoid mud erosion.

[0086] Furthermore, the present invention discloses that the drilling pressure torque data acquisition and control short section 4 also includes a circuit board skeleton 406, the circuit board skeleton 406 is installed in the pressure tube 403, and the short section circuit board 401 is embedded in the circuit board skeleton 406 through organic hard silicone potting. Specifically, the double-sided grooves of the circuit board skeleton 406 are opened, and the short section circuit board 401 (control circuit, storage chip and other processing circuits are integrated in the short section circuit board 401) is embedded in the circuit board skeleton 406, and potted with 4mm-5mm organic hard silicone to prevent the harsh underground environment from affecting the circuit system.

[0087] Furthermore, the drilling pressure torque data acquisition and control short section 4 disclosed in the present invention also includes a battery assembly 407, which is filled in the pressure-bearing tube 403 through organic silica gel and is electrically connected to the short section circuit board 401 to supply power to the short section circuit board 401.

[0088] Specifically, the battery assembly 407 is composed of a plurality of high-temperature lithium batteries and is potted with silicone to protect the high-temperature lithium batteries and reduce shock.

[0089] Furthermore, the present invention discloses that the drilling pressure torque data acquisition and control sub 4 also includes a shock absorbing structure 408, a threaded pressing block 409 and a concave pressing block 410. The shock absorbing structure 408 is connected to the inner wall of the convex circuit connector 402, and the threaded pressing block 409 is connected to the convex circuit connector 402. The bottom end of the shock absorbing structure 408 is connected to the top end of the threaded pressing block 409, and the top end of the concave pressing block 410 is connected to the bottom end of the threaded pressing block 409. The top end of the circuit board skeleton 406 is connected to the bottom end of the concave pressing block 410. The arrangement of the shock absorbing structure 408, the threaded pressing block 409 and the concave pressing block 410 has the effect of shock absorption and fixing the structure.

[0090] In some of the embodiments, the downhole drilling pressure torque measuring tool also includes a stabilizer 5, which is located in a closed shell and installed at the bottom end of the pressure tube 403, which can effectively reduce the damage of vibration to the short circuit board 401 and the battery assembly 407.

[0091] The drilling pressure torque downhole parameter measurement tool provided by the specific embodiment of the present invention, when used on site, needs to connect the ground control system with the Bluetooth board 302 through the ground interface box, set the parameters of the drilling pressure torque data acquisition and control short section 4, and work in the well. The tool has been successfully tested in many wells such as the Wei 5*-2 inclination section and the Zi 2*1H horizontal section to obtain the changes in drilling engineering parameters in the Dongpu work area and the southern Sichuan work area, compare the differences between the downhole and ground engineering parameters, and analyze the transmission efficiency of the engineering parameters.

[0092] The present invention can directly collect downhole drilling pressure torque, continuously measure and record the change of downhole drilling pressure torque, and grasp the stress state and movement law of downhole drilling tools by analyzing the measured drilling pressure torque data. Its structural design is reasonable, installation is convenient, and use is simple, which reduces the difficulty of later maintenance.

[0093] It should be noted that the top and the bottom are defined along the direction from the upper plug to the lower plug, and the upper plug to the lower plug is the top to the bottom, which is only for the convenience of expression and does not have other specific meanings. Relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0094] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to the embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and inventive features disclosed herein.

[0095] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A downhole drilling pressure torque measurement tool, characterized in that: Including drill collar short section, strain gauge, control device and drilling pressure torque data acquisition and control short section; A first mounting groove and a second mounting groove are respectively provided on the side wall of the drill collar short section, the strain measuring instrument and the control device are respectively packaged in the first mounting groove and the second mounting groove, and the strain measuring instrument is interference fit with the groove wall of the first mounting groove; The drilling pressure torque data acquisition and control short section is installed in the drill collar short section; The strain gauge is signal-connected to the control device and can transmit the measured torque signal to the control device, and the control device is used to process the torque signal; The drilling pressure torque data acquisition and control sub is connected to the control device signal, and is used to store and receive the processed data signal transmitted by the control device; The control device comprises a wire-passing pressure-bearing plug, and the wire-passing pressure-bearing plug is fixedly installed in the second installation groove; The drilling pressure torque data acquisition and control sub includes a closed shell and a sub circuit board; a protrusion is provided on the side wall of the closed shell, the protrusion extends from the bottom of the second mounting groove into the second mounting groove, a mounting hole communicating with the inner cavity of the closed shell is opened on the protrusion, and the wire-passing pressure plug is connected to the mounting hole; The mounting hole is a threaded hole, and the wire-passing pressure-bearing plug is threadedly connected to the mounting hole; The closed housing includes a convex circuit connector, a pressure-bearing cylinder, an upper plug and a lower plug; The raised portion is arranged on the hollow convex circuit connector, the upper plug is sealedly connected to the top end of the convex circuit connector, the top end of the pressure-bearing cylinder is sealedly connected to the bottom end of the convex circuit connector, and the bottom end of the pressure-bearing cylinder is sealedly connected to the lower plug; the short section circuit board is arranged in the pressure-bearing cylinder.

2. The downhole drilling pressure torque measuring tool according to claim 1, characterized in that: The strain gauge comprises a cylindrical body, a substrate and a plurality of sets of strain gauge assemblies; The base plate is arranged at the bottom end of the cylindrical body, and the base plate is interference-engaged with the groove wall of the first installation groove; The strain gauge components are sequentially pasted on the substrate.

3. The downhole drilling pressure torque measuring tool according to claim 2, characterized in that: The substrate is made of ceramic; and / or The strain gauge assembly includes a four-arm bridge circuit and a plurality of strain gauges integrated and mounted on each arm of the bridge circuit; and / or The interference fit between the strain gauge and the first mounting groove is greater than or equal to 0.03 mm and less than or equal to 0.04 mm; and / or A pressure sensing patch is installed around the matching position between the strain gauge and the first mounting groove; and / or The number of the strain gauges and the first installation slots is equal, both greater than or equal to 2, and are installed one-to-one. When the number of the strain gauges and the number of the first mounting grooves are both 2, the two first mounting grooves are respectively placed on both sides of the second mounting groove and are respectively arranged at a 90° interval from the second mounting groove.

4. The downhole drilling pressure torque measuring tool according to claim 3, characterized in that: The control device comprises a control circuit board and a Bluetooth board; The control circuit board is connected to the strain gauge signal, and is used to receive the torque signal measured by the strain gauge, and process the torque signal; The Bluetooth board is respectively connected to the control circuit board and the drilling pressure torque data acquisition and control short section signal, and is used to transmit the data signal processed by the control circuit board to the drilling pressure torque data acquisition and control short section for storage, and can transmit the data stored in the drilling pressure torque data acquisition and control short section after the torque measurement is completed.

5. The downhole drilling pressure torque measuring tool according to claim 4, characterized in that: The control circuit board and the Bluetooth board are installed in the wire-passing pressure-bearing plug; The first mounting slot and the second mounting slot are connected via a connecting hole, and the connecting hole is used for a wire electrically connecting the control circuit board and the strain gauge to pass through.

6. The downhole drilling pressure torque measuring tool according to claim 5, characterized in that: The bottom of the second mounting groove is in communication with the inner cavity of the drill collar short section.

7. The downhole drilling pressure torque measuring tool according to claim 6, characterized in that: The drilling pressure torque data acquisition and control sub also includes a circuit board frame; The circuit board frame is installed in the pressure-bearing cylinder, and the short-section circuit board is embedded in the circuit board frame by organic hard silicone potting; and / or The drilling pressure torque data acquisition and control pup joint also includes a battery assembly, which is filled in the pressure-bearing cylinder through organic silica gel and is electrically connected to the pup joint circuit board to supply power to the pup joint circuit board.

8. The downhole drilling pressure torque measuring tool according to claim 7, characterized in that: The drilling pressure torque data acquisition and control sub also includes a shock absorbing structural member, a threaded pressing block and a concave pressing block; The shock absorbing structural member is connected to the inner wall of the convex circuit connector, and the threaded pressing block is connected to the convex circuit connector; The bottom end of the shock absorbing structure is connected to the top end of the threaded pressing block, and the top end of the concave pressing block is connected to the bottom end of the threaded pressing block; The top end of the circuit board frame is connected to the bottom end of the concave pressing block.

9. The downhole drilling pressure torque measuring tool according to any one of claims 1 to 8, characterized in that: Also included are centralizers; The centralizer is located in the closed shell, and the centralizer is installed at the bottom end of the pressure cylinder.

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