Measurement-while-drilling mud pressure instrument

Abstract

The invention discloses a measurement-while-drilling mud pressure instrument, which belongs to the technical field of petroleum drilling engineering, and is characterized in that a data acquisition unit outside an outer ring detection rod is communicated with an annular groove in an inner cylinder, and a data acquisition unit on an inner ring detection rod is exposed outside; the main rod body, the inner ring detection rod and the outer ring detection rod except the area covered by the outer pressing ring are all soaked in inner annular space mud, the three drainage holes are all communicated with the annular groove, and a pressure sensor in the outer ring detection rod can collect outer annular space mud pressure information. The pressure sensor in the inner ring detection rod can collect inner annulus mud pressure information, the data processing unit processes and stores outer annulus mud pressure data and inner annulus mud pressure data collected at the two positions, and real-time measurement of mud pressure is achieved in the mode that underground inner annulus mud pressure and underground outer annulus mud pressure are measured at the same time. Therefore, well condition requirements can be judged in combination with the data, and a proper instrument combination can be selected for next well drilling.

Description

Technical Field

[0001] The present invention belongs to the technical field of oil drilling engineering, and specifically relates to a measurement-while-drilling mud pressure instrument. Background Art

[0002] During the drilling process of resources such as oil and natural gas, it is crucial to accurately understand the mud pressure condition downhole. Mud plays various roles in drilling, such as cooling the drill bit, carrying cuttings, and balancing formation pressure. If the mud pressure is not properly controlled, serious accidents such as blowouts and lost circulation may occur.

[0003] In the current exploration and development field, with the secondary development of old wellbores, the drilling depth is continuously increasing, and the time for tripping in and out is getting longer. The shallow regional exploitation in the oil area is approaching the end, and the reservoirs of block oil and gas are relatively deep. If the selected instrument combination is not applicable, it takes a long time to trip out and then trip in again, which not only delays the exploitation progress but also increases the exploitation cost, and it is difficult to achieve the purpose of measuring the mud pressure in both the inner and outer annuli downhole simultaneously. Therefore, a measurement-while-drilling mud pressure instrument is needed to solve the above problems. Summary of the Invention

[0004] In order to overcome the above defects, the present invention provides a measurement-while-drilling mud pressure instrument, which solves the problems that the reservoirs of block oil and gas are relatively deep. If the selected instrument combination is not applicable, it takes a long time to trip out and then trip in again, which not only delays the exploitation progress but also increases the exploitation cost, and it is difficult to achieve the purpose of measuring the mud pressure in both the inner and outer annuli downhole simultaneously.

[0005] To achieve the above object, the present invention provides the following technical solution: A measurement-while-drilling mud pressure instrument, including a main rod body. A data processing unit and a power conversion module are installed inside the main rod body. One end of the main rod body is installed with a coupling. An inner ring detection rod is movably installed at the end of the coupling away from the main rod body. An outer ring detection rod is fixedly penetrated through the inner ring detection rod. An outer blocking component is fixedly clamped on the outer wall of the outer ring detection rod. Installation grooves are formed on the inner ring detection rod and the outer ring detection rod. A support component is fixedly connected to the bottom end of the inner wall of the installation groove. The top of the support component is slidably connected inside the installation groove. A data acquisition unit is lapped on the top of the support component. The data acquisition unit is clamped in the installation groove. The data acquisition unit on the outer ring detection rod is located inside the outer blocking component. Locking components respectively penetrate and slide on both sides of the data acquisition unit. Two card slots are respectively formed on both sides of the inner wall of the installation groove. One side of the locking component is clamped in the two card slots on the same side.

[0006] As a further solution of the present invention: The outer blocking component includes an outer pressing ring, and a protruding end on the inner wall of the outer pressing ring is fixedly connected to an inner cylinder. Three uniformly distributed drainage holes are formed in the outer wall of the outer pressing ring and lead directly into the inner cylinder. A circular groove is formed in the middle of the inner wall of the inner cylinder, and the three drainage holes are all communicated with the circular groove.

[0007] As a further solution of the present invention: Outer blocking strips are respectively arranged on both sides of the outer wall of the outer pressing ring. Sealing rings are respectively clamped on both sides of the inner wall of the inner cylinder, and the sealing rings are arranged outside the outer ring detection rod.

[0008] As a further solution of the present invention: The data acquisition unit includes a pressure sensor. The pressure sensor is clamped in the installation groove. A top cover is fixedly connected to the top of the pressure sensor. An induction port is arranged in the middle of the top cover, and the induction port is located in the circular groove. The induction port on the top cover of the pressure sensor and the circular groove in the outer pressing ring are in the same radial position during use.

[0009] As a further solution of the present invention: Slide holes are respectively formed on both sides of the top cover. The locking component penetrates and slides in the slide holes. A sliding groove is formed on one side of the inner wall of the slide hole. One end of the top of the locking component slides in the sliding groove. Limit grooves are respectively formed on both sides of the bottom of the inner wall of the top cover. The bottom end of the locking component slides in the limit grooves.

[0010] As a further solution of the present invention: The support component includes a top block. The top block is slidably connected in the installation groove. The top of the top block abuts against the bottom of the pressure sensor. A first spring is fixedly connected to the bottom of the top block, and the bottom end of the first spring is fixed to the bottom of the inner wall of the installation groove.

[0011] As a further solution of the present invention: The locking component includes a pull rod. The pull rod penetrates and slides in the slide hole and an operation groove is formed at the top. One end of the top of the pull rod slides in the sliding groove, and the bottom end of the pull rod slides in the limit groove. Two clamping blocks are fixedly connected to the side of the pull rod away from the pressure sensor. The clamping blocks are clamped in the clamping grooves. The top of the clamping block is designed as a plane and the bottom is designed as an arc surface. The shape of the clamping block is adapted to that of the clamping groove. Two second springs are fixedly connected between the pull rod and the pressure sensor.

[0012] As a further solution of the present invention: The pressure sensor is used to collect mud pressure information in real time, and the collected mud pressure information includes inner annulus mud pressure and outer annulus mud pressure. The data processing unit is used to store the mud pressure information collected by the pressure sensor into the memory chip of the data processing unit.

[0013] As a further solution of the present invention: the data processing unit is set to CAN communication, 485 communication and ULAN communication mode, and the power conversion module is used to convert 12V-60V DC power into 12V DC power required by the data processing unit and the pressure sensor, thereby achieving the purpose of external wide voltage power supply.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the present invention, the outer pressure ring of the outer stop assembly is sleeved and clamped on the outside of the outer ring detection rod, so that the inner tube can slide outside the outer ring detection rod, and the inner tube can play a role in sealing the outer ring detection rod and the inner tube when squeezing the sealing ring. At this time, the data acquisition unit outside the outer ring detection rod is located in the annular groove in the inner tube, and the data acquisition unit on the inner ring detection rod is exposed to the outside. The main rod body, the inner ring detection rod and the outer ring detection rod are fixed in the center of the drill collar by the outer pressure ring. When the drill collar drives the two data acquisition units into the well through the main rod body, the inner ring detection rod and the outer ring detection rod, the main rod body, the inner ring detection rod and the outer ring detection rod are free of the outer pressure ring. The covered area is immersed in the inner annulus mud. Since the sensing port on the top cover of the pressure sensor and the annular groove in the outer pressure ring are in the same radial position when in use, the three drainage holes are connected with the annular groove, so that the pressure sensor in the outer ring detection rod can collect the outer annulus mud pressure information, and the pressure sensor in the inner ring detection rod can collect the inner annulus mud pressure information. The data processing unit processes and stores the outer annulus mud pressure data and the inner annulus mud pressure data collected by the two pressure sensors. By measuring the inner and outer annular mud pressures simultaneously, the real-time measurement of the mud pressure is realized, so as to judge the well condition requirements in combination with this data and select the appropriate instrument combination for the next drilling.

[0015] 2. In the present invention, when the data acquisition unit is removed, the two pull rods are squeezed in the two sliding holes on the top cover. Because the operating groove is provided on the top of the pull rod, it plays an anti-skid role, so that the positions of the two pull rods can be relatively adjusted. In the process of the two pull rods approaching each other, the card block will be driven to move, so that the card block can be separated from the card slot in the installation slot, that is, the locking state between the pressure sensor and the installation slot is released, and the top block is supported by the elastic force of the first spring, so that the top block can push the pressure sensor upward, so that the pressure sensor drives the top cover and the card block to move upward, so that the card block and the card slot are staggered, to prevent the card block from being stuck in the card slot again when the pull rod is released. At this time, the top cover moves up and pops out of the installation slot, so that it is convenient to remove the pressure sensor from the installation. When installing the pressure sensor, the pressure sensor is inserted into the installation slot. When the top cover is completely embedded in the installation slot, the pull rod is supported by the elastic force of the second spring, so that the card block can be stuck in the card slot, so as to achieve the purpose of quick installation of the pressure sensor, thereby facilitating the inspection and replacement of the data acquisition unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of the three-dimensional structure of the present invention.

[0017] Figure 2 This is a schematic structural diagram of the connection between the main rod body and the coupling of the present invention.

[0018] Figure 3 This is a schematic structural diagram of the outer blocking component of the present invention.

[0019] Figure 4 This is a schematic structural diagram of the cross-section of the outer blocking component of the present invention.

[0020] Figure 5 This is a schematic structural diagram of the partial cross-section of the outer ring detection rod of the present invention.

[0021] Figure 6 This is a schematic cross-sectional structural diagram of the front view of the outer ring detection rod of the present invention.

[0022] Figure 7 This is a schematic structural diagram of the data acquisition unit of the present invention.

[0023] Figure 8 This is the present invention Figure 7 The enlarged schematic structural diagram at position A in the present invention.

[0024] Figure 9 This is a schematic structural diagram of the locking component of the present invention.

[0025] In the figure: 1. Main rod body; 2. Data processing unit; 3. Power conversion module; 4. Coupling; 5. Inner ring detection rod; 6. Outer ring detection rod; 7. Outer blocking component; 701. Outer pressure ring; 702. Inner cylinder; 703. Drainage hole; 704. Annular groove; 705. Outer blocking strip; 8. Sealing ring; 9. Installation groove; 10. Data acquisition unit; 101. Pressure sensor; 102. Top cover; 103. Induction port; 11. Support component; 111. Top block; 112. First spring; 12. Slide hole; 13. Slide groove; 14. Locking component; 141. Pull rod; 142. Block; 143. Second spring; 144. Operation groove; 15. Card slot; 16. Limit groove. Specific embodiments

[0026] The technical solutions of the present application will be further described in detail below in conjunction with specific embodiments.

[0027] As Figure 1-9As shown in the figure, the present invention provides a technical solution: a measurement-while-drilling mud pressure instrument, which includes a main rod body 1. A data processing unit 2 and a power conversion module 3 are installed inside the main rod body 1. One end of the main rod body 1 is installed with a coupling 4. An inner ring detection rod 5 is movably installed at the end of the coupling 4 away from the main rod body 1. An outer ring detection rod 6 is fixedly penetrated inside the inner ring detection rod 5. An outer blocking component 7 is clamped and fixed on the outer wall of the outer ring detection rod 6. The outer blocking component 7 includes an outer pressure ring 701. A protruding end on the inner wall of the outer pressure ring 701 is fixedly connected with an inner cylinder 702. Three uniformly distributed drainage holes 703 are opened on the outer side of the outer pressure ring 701 and directly lead to the inner cylinder 702. A circular groove 704 is opened in the middle of the inner wall of the inner cylinder 702, and the three drainage holes 703 are all communicated with the circular groove 704. The main rod body 1, the inner ring detection rod 5 and the outer ring detection rod 6 are centered and fixed in the drill collar through the outer pressure ring 701. Through the supporting action of the outer pressure ring 701, the functions of shock absorption and straightening for the main rod body 1, the inner ring detection rod 5 and the outer ring detection rod 6 are achieved.

[0028] Outer blocking strips 705 are respectively arranged on both sides of the outer wall of the outer pressure ring 701. Sealing rings 8 are respectively clamped on both sides of the inner wall of the inner cylinder 702. The sealing rings 8 are arranged outside the outer ring detection rod 6. Due to the presence of the sealing rings 8, when the inner cylinder 702 squeezes the sealing rings 8, it can play a role in sealing the connection between the outer ring detection rod 6 and the inner cylinder 702, preventing mud from entering the interior from the connection between the outer ring detection rod 6 and the inner cylinder 702.

[0029] Installation grooves 9 are opened on the inner ring detection rod 5 and the outer ring detection rod 6. A support component 11 is fixedly connected to the bottom end of the inner wall of the installation groove 9. The support component 11 includes a top block 111. The top block 111 is slidably connected in the installation groove 9. The top of the top block 111 abuts against the bottom of the pressure sensor 101. The bottom of the top block 111 is fixedly connected with a first spring 112. The bottom end of the first spring 112 is fixed to the bottom of the inner wall of the installation groove 9. The top block 111 is supported by the elastic force of the first spring 112, so that the top block 111 can push the data acquisition unit 10 upward and eject it from the installation groove 9, facilitating the removal of the data acquisition unit 10.

[0030] The top of the support component 11 is slidably connected to the inside of the installation groove 9. The data acquisition unit 10 is lapped on the top of the support component 11. The data acquisition unit 10 is clamped in the installation groove 9. The data acquisition unit 10 includes a pressure sensor 101. The pressure sensor 101 is clamped in the installation groove 9. A top cover 102 is fixedly connected to the top of the pressure sensor 101. An induction port 103 is provided in the middle of the top cover 102, and the induction port 103 is located in the annular groove 704. The induction port 103 of the top cover 102 on the pressure sensor 101 and the annular groove 704 in the outer pressure ring 701 are in the same radial position during use. Because the induction port 103 of the top cover 102 on the pressure sensor 101 and the annular groove 704 in the outer pressure ring 701 are in the same radial position during use, all three drainage holes 703 are connected to the annular groove 704, which is convenient for the pressure sensor 101 in the outer ring detection rod 6 to collect the mud pressure information in the outer annulus.

[0031] Sliding holes 12 are respectively opened on both sides of the top cover 102. The locking component 14 penetrates and slides in the sliding holes 12. A sliding groove 13 is opened on one side of the inner wall of the sliding hole 12. One end of the top of the locking component 14 is slidably connected in the sliding groove 13. Limiting grooves 16 are respectively opened on both sides of the bottom of the inner wall of the top cover 102. The bottom end of the locking component 14 is slidably connected in the limiting grooves 16. By squeezing the two pull rods 141 in the two sliding holes 12 on the top cover 102, since an operation groove 144 is opened at the top of the pull rod 141, it plays a role in anti-slip, so as to facilitate the relative adjustment of the positions of the two pull rods 141. Since one end of the top of the pull rod 141 slides inside the sliding groove 13, it plays a role in limiting the pull rod 141 and improves the stability of the horizontal movement of the pull rod 141.

[0032] The data acquisition unit 10 on the outer ring detection rod 6 is located inside the outer blocking assembly 7. Locking assemblies 14 penetrate and slide on both sides of the data acquisition unit 10. Two card slots 15 are respectively formed on both sides of the inner wall of the installation groove 9. One side of the locking assembly 14 is clamped in the two card slots 15 on the same side. The locking assembly 14 includes a pull rod 141. The pull rod 141 penetrates and slides in the sliding hole 12, and an operation groove 144 is formed at the top. One end of the top of the pull rod 141 slides in the sliding groove 13, and the bottom end of the pull rod 141 is slidably connected in the limiting groove 16. Two clamping blocks 142 are fixedly connected to the side of the pull rod 141 away from the pressure sensor 101. The clamping blocks 142 are clamped in the card slots 15. The top of the clamping block 142 is designed as a plane and the bottom is designed as an arc surface. The shape of the clamping block 142 is adapted to the card slot 15. Two second springs 143 are fixedly connected between the pull rod 141 and the pressure sensor 101. Due to the arc-shaped design of the bottom of the clamping block 142, it will be pressed when contacting the side wall of the installation groove 9 and drive the pull rod 141 to approach the pressure sensor 101. When the top cover 102 is completely embedded in the installation groove 9, the pull rod 141 is supported by the elastic force of the second spring 143, so that the clamping block 142 can be clamped into the card slot 15. Due to the plane design of the top of the clamping block 142, it will not move up freely after being clamped into the card slot 15, thus facilitating the rapid installation of the pressure sensor 101.

[0033] The pressure sensor 101 is used to collect mud pressure information in real time, and the collected mud pressure information includes the inner annulus mud pressure and the outer annulus mud pressure. The data processing unit 2 is used to store the mud pressure information collected by the pressure sensor 101 in the memory chip of the data processing unit 2.

[0034] The data processing unit 2 is set to CAN communication, 485 communication, and ULAN communication methods to achieve the interconnection and interoperability of multiple communication methods during the measurement-while-drilling process, without being limited to the series connection in a single instrument. The power conversion module 3 is used to convert the direct current of 12V - 60V into the 12V direct current required by the data processing unit 2 and the pressure sensor 101, achieving the purpose of external wide-voltage power supply to facilitate the series connection and use with logging instruments with different power supply voltages.

[0035] The working principle of the present invention is as follows: when in use, the outer pressure ring 701 of the outer stop assembly 7 is sleeved and clamped on the outside of the outer ring detection rod 6, so that the inner tube 702 can slide outside the outer ring detection rod 6, and the inner tube 702 can seal the connection between the outer ring detection rod 6 and the inner tube 702 when squeezing the sealing ring 8, so as to prevent mud from entering the interior from the connection between the outer ring detection rod 6 and the inner tube 702. At this time, the data acquisition unit 10 outside the outer ring detection rod 6 is located in the annular groove 704 in the inner tube 702, and the data acquisition unit 10 on the inner ring detection rod 5 is exposed to the outside, and the main rod body 1, the inner ring detection rod 5 and the outer ring detection rod 6 are fixed in the center in the drill collar by the outer pressure ring 701, and the supporting effect of the outer pressure ring 701 is used to reduce shock and straighten the main rod body 1, the inner ring detection rod 5 and the outer ring detection rod 6.

[0036] When the drill collar drives the two data acquisition units 10 into the well through the main rod body 1, the inner ring detection rod 5 and the outer ring detection rod 6, the main rod body 1, the inner ring detection rod 5 and the outer ring detection rod 6, except the area covered by the outer pressure ring 701, are all immersed in the inner annulus mud. Because the sensing port 103 of the top cover 102 of the pressure sensor 101 and the annular groove 704 in the outer pressure ring 701 are in the same radial position when in use, the three drainage holes 703 are all connected with the annular groove 704, so that the pressure sensor 101 in the outer ring detection rod 6 can collect the outer annulus mud pressure information, and the pressure sensor 101 in the inner ring detection rod 5 can collect the inner annulus mud pressure information. The data processing unit 2 processes the outer annulus mud pressure data and the inner annulus mud pressure data collected by the two pressure sensors 101, and saves them in the memory chip of the data processing unit 2. After the instrument returns to the ground, it can connect to the ground equipment to download and view the stored data.

[0037] When the data acquisition unit 10 is removed, the two pull rods 141 are squeezed into the two sliding holes 12 on the top cover 102. Since the operating groove 144 is provided on the top of the pull rod 141, it plays an anti-skid role, so that the positions of the two pull rods 141 can be relatively adjusted. Since one end of the top of the pull rod 141 slides in the sliding groove 13, it plays a role in limiting the pull rod 141 and improving the stability of the horizontal movement of the pull rod 141. When the two pull rods 141 approach each other, the block 142 will be driven to move, so that the block 142 can be separated from the card in the installation groove 9. The locking state between the pressure sensor 101 and the mounting slot 9 is released, and the top block 111 is supported by the elastic force of the first spring 112, so that the top block 111 can push the pressure sensor 101 upward, and the pressure sensor 101 drives the top cover 102 and the card block 142 to move upward, so that the card block 142 is staggered with the card slot 15 to prevent the card block 142 from being stuck in the card slot 15 again when the pull rod 141 is loosened. At this time, the top cover 102 moves up and the mounting slot 9 pops out, making it easy to remove the top cover 102 and the pressure sensor 101 from the mounting slot 9.

[0038] When installing the data acquisition unit 10, hold the cover plate and insert the pressure sensor 101 into the installation groove 9, so that the bottom of the pressure sensor 101 can squeeze the first spring 112 through the top block 111. During the process of the pull rod 141 driving the clamping block 142 to move downward, due to the arc-shaped design of the bottom of the clamping block 142, it will be pressed when contacting the side wall of the installation groove 9 and drive the pull rod 141 to approach the pressure sensor 101. When the top cover 102 is completely embedded in the installation groove 9, the elastic force of the second spring 143 supports the pull rod 141, so that the pull rod 141 slides in the sliding hole 12 and the limiting groove 16. The limiting groove 16 horizontally limits the bottom end of the pull rod 141, and the sliding hole 12 limits the top of the pull rod 141, thereby improving the stability of the pull rod 141 driving the clamping block 142 to move, so that the clamping block 142 can be stuck into the clamping groove 15. Due to the flat design of the top of the clamping block 142, it will not move upward freely after being stuck into the clamping groove 15, thereby achieving the purpose of quickly installing the data acquisition unit 10.

[0039] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0040] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or a communication; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present invention, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one solution", "some solutions", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the solution or example are included in at least one solution or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same solution or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more solutions or examples.

Claims

1. A mud pressure measurement while drilling instrument, comprising a main rod body (1), characterized in that: A data processing unit (2) and a power conversion module (3) are installed inside the main rod body (1); a coupling (4) is installed at one end of the main rod body (1); an inner ring detection rod (5) is movably installed at one end of the coupling (4) away from the main rod body (1); an outer ring detection rod (6) is fixedly inserted into the inner ring detection rod (5); an outer stopper component (7) is fixedly connected to the outer wall of the outer ring detection rod (6); a mounting groove (9) is formed on the inner ring detection rod (5) and the outer ring detection rod (6); a support component (11) is fixedly connected to the bottom end of the inner wall of the mounting groove (9); The top of the support component (11) is slidably connected to the inner side of the installation groove (9), the top of the support component (11) is overlapped with a data acquisition unit (10), the data acquisition unit (10) is snap-fitted into the installation groove (9), the data acquisition unit (10) on the outer ring detection rod (6) is located inside the outer stop component (7), locking components (14) are respectively slidably penetrated on both sides of the data acquisition unit (10), two snap-fitting grooves (15) are respectively provided on both sides of the inner wall of the installation groove (9), and one side of the locking component (14) is snap-fitted into the two snap-fitting grooves (15) on the same side.

2. The mud pressure measurement while drilling instrument according to claim 1, characterized in that: The outer stopper assembly (7) comprises an outer pressure ring (701), the protruding end of the inner wall of the outer pressure ring (701) being fixedly connected to the inner cylinder (702), the outer surface of the outer pressure ring (701) being provided with three evenly distributed drainage holes (703) which are directly connected to the inner cylinder (702), the middle portion of the inner wall of the inner cylinder (702) being provided with an annular groove (704), and the three drainage holes (703) are all connected to the annular groove (704).

3. The mud pressure measurement while drilling instrument according to claim 2, characterized in that: External stop strips (705) are respectively provided on both sides of the outer wall of the outer pressure ring (701), and sealing rings (8) are respectively clamped on both sides of the inner wall of the inner cylinder (702), wherein the sealing rings (8) are arranged outside the outer ring detection rod (6).

4. The mud pressure measurement while drilling instrument according to claim 2, characterized in that: The data acquisition unit (10) comprises a pressure sensor (101), the pressure sensor (101) is snap-fitted into the mounting groove (9), a top cover (102) is fixedly connected to the top of the pressure sensor (101), a sensing port (103) is arranged in the middle of the top cover (102), and the sensing port (103) is located in the annular groove (704), and the sensing port (103) of the top cover (102) of the pressure sensor (101) and the annular groove (704) in the outer pressure ring (701) are in the same radial position when in use.

5. The mud pressure measurement while drilling instrument according to claim 4, characterized in that: Sliding holes (12) are respectively provided on both sides of the top cover (102), the locking component (14) penetrates and slides in the sliding hole (12), a sliding groove (13) is provided on one side of the inner wall of the sliding hole (12), one end of the top of the locking component (14) is slidably connected in the sliding groove (13), and limiting grooves (16) are respectively provided on both sides of the bottom of the inner wall of the top cover (102), and the bottom end of the locking component (14) is slidably connected in the limiting groove (16).

6. The mud pressure measurement while drilling instrument according to claim 5, characterized in that: The support assembly (11) comprises a top block (111), the top block (111) is slidably connected in the mounting groove (9), the top of the top block (111) overlaps the bottom of the pressure sensor (101), the bottom of the top block (111) is fixedly connected to a first spring (112), and the bottom end of the first spring (112) is fixed to the bottom of the inner wall of the mounting groove (9).

7. The mud pressure measurement while drilling instrument according to claim 5, characterized in that: The locking assembly (14) comprises a pull rod (141), the pull rod (141) passes through and slides in the sliding hole (12) and has an operating groove (144) on the top, one end of the top of the pull rod (141) slides in the sliding groove (13), and the bottom end of the pull rod (141) is slidably connected in the limit groove (16), two clamping blocks (142) are fixedly connected to the side of the pull rod (141) away from the pressure sensor (101), the clamping block (142) is clamped in the clamping groove (15), the top of the clamping block (142) is flat and the bottom is curved, the shape of the clamping block (142) matches that of the clamping groove (15), and two second springs (143) are fixedly connected between the pull rod (141) and the pressure sensor (101).

8. The mud pressure measurement while drilling instrument according to claim 4, characterized in that: The pressure sensor (101) is used to collect mud pressure information in real time, and the collected mud pressure information includes inner annular mud pressure and outer annular mud pressure. The data processing unit (2) is used to store the mud pressure information collected by the pressure sensor (101) in a memory chip of the data processing unit (2).

9. The mud pressure measurement while drilling instrument according to claim 8, characterized in that: The data processing unit (2) is configured to use CAN communication, 485 communication and ULAN communication modes, and the power conversion module (3) is used to convert 12V-60V direct current into 12V direct current required by the data processing unit (2) and the pressure sensor (101), thereby achieving the purpose of external wide voltage power supply.

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