Data acquisition device and underground data acquisition method

Abstract

The invention provides a data acquisition device and an underground data acquisition method, the data acquisition device comprises a shell having a first end and a second end located at two ends of a central axis of the shell, the outer surface of the first end and the outer surface of the second end being spherical surfaces with different diameters, the shell can fall into a ball seat of an underground packing tool in the mode that the first end or the second end faces forwards, and the ball seat is plugged. The data acquisition module is installed in the shell, the first end and the second end of the shell are each provided with a detection channel, the data acquisition module is provided with a first sensor arranged in the detection channel, and the first sensors are used for detecting fluid parameters on the two sides of the underground packing tool; and the data storage module is electrically connected with the data acquisition module. The problem that fluid data at the two ends of an underground packing tool cannot be effectively collected to judge the packing effect after setting due to the fact that the collecting position of an existing ball type underground collector continuously changes in the well descending process can be solved.

Description

[0001] Related applications

[0002] This invention patent application claims priority to Chinese invention patent application filed on September 30, 2024, with application number 202411391162.2 and inventive title "Data Acquisition Device and Downhole Data Acquisition Method". Technical Field

[0003] This invention relates to the field of data acquisition technology for pipelines, pipe networks and downhole environments, and particularly to a data acquisition device and a downhole data acquisition method. Background Technology

[0004] Acquiring downhole pressure, temperature, and other data is crucial for rapid formation interpretation and evaluation, reservoir stimulation effect analysis and judgment, wellbore operation identification and analysis, and production status interpretation and evaluation. It provides reliable data for formulating subsequent construction plans and determining reasonable construction parameters. Therefore, research on downhole test data acquisition technology has become an inevitable direction for the development of digital oilfields.

[0005] Currently, downhole data acquisition technologies during drilling, completion, and production mainly include permanent downhole pressure monitoring, wired cable reading, electronic pressure gauge deployment and retrieval, and permanent fiber optic monitoring. However, all of these technologies require integration with casing, steel wire, cable, and fiber optics, necessitating additional tools. This results in complex construction processes, high costs, and low economic efficiency, particularly in deep wells and wells with long horizontal sections. Consequently, these technologies are typically only used during the exploration phase and in key areas, preventing widespread application.

[0006] Currently, downhole data acquisition devices typically employ a spherical structure and are generally used for data acquisition from pipelines, pipeline networks, and the downhole environment. However, they cannot meet the needs of reservoir stimulation applications in oil and gas field development. Their internal space is designed with multiple modules for acquisition, storage, and processing. For example, Chinese invention patent application CN108180014A discloses a device and method for monitoring bottom hole information; US invention patent application US20160320769A1 discloses a cordless device for measuring underground wellbore characteristics; US invention patent application US20190242808A1 discloses a corrosion sensor and a sphere; and Japanese invention patent application JP2023092039A discloses a physical quantity measuring device. All of the above patents adopt a spherical design. When the sphere is used in a downhole casing environment, since the outer diameter of the sphere does not exceed the inner diameter of the casing, only a single sensor module can be built in to collect data from one end, making it impossible to effectively judge the sealing effect of the sealing tool. In other downhole environments, multiple sensors can be deployed in a large-diameter sphere. However, the sphere constantly rotates in the downhole fluid environment, and the collection position of each sensor changes constantly. When the sphere reaches its landing position, the rotation state of the sphere is random, and the collection position is also random. The collection sensor lands on the contact surface of the packer's ball body, causing the collection port to be blocked by the contact surface and unable to collect data normally. Moreover, it will still rotate after landing, making it impossible to effectively judge the data collected at both ends of the packer and judge the separation effect.

[0007] In addition, regarding the return method, the above patents use a return method that involves returning soluble spheres or electronic component modules to the wellhead for data reading. However, if the flow velocity at the bottom of the well is low, it will lead to great difficulty in returning the entire acquisition device or even failure to return it, resulting in low reliability, poor feasibility, or difficulty in separating the electronic component modules from the return body, making it impossible to release them effectively. Summary of the Invention

[0008] The purpose of this invention is to provide a data acquisition device and a downhole data acquisition method to solve the technical problems of low efficiency and high cost caused by the complexity of current tools and construction processes for acquiring downhole data.

[0009] The above-mentioned technical objectives of this invention are mainly achieved through the following technical solutions:

[0010] In a first aspect, the present invention provides a data acquisition device, comprising:

[0011] The housing has a first end and a second end located at both ends of its central axis. The outer surfaces of the first end and the second end are spherical surfaces with different diameters. The housing can be dropped into the ball seat of the downhole packer with either the first end or the second end facing forward and seal the ball seat.

[0012] A data acquisition module is installed inside the housing. Both the first and second ends of the housing are provided with detection channels. The data acquisition module has a first sensor located in the detection channel. The first sensor is used to detect fluid parameters on both sides of the downhole packing tool.

[0013] A data storage module, which is electrically connected to the data acquisition module;

[0014] Wherein, between the first end and the second end, the outer surface of the shell is a smooth transition surface that can smoothly connect the two spherical surfaces.

[0015] In a preferred embodiment of the present invention, of the two spherical surfaces at the first end and the second end, one of the spherical surfaces has an arc range of 5π / 4 to 7π / 5 and a diameter range of 55mm to 90mm; the other spherical surface has an arc range of 4π / 5 to π and a diameter range of 35mm to 65mm.

[0016] In a preferred embodiment of the present invention, the centers of the two spherical surfaces at the first end and the second end are both located on the central axis of the housing, and the detection channels provided at the first end and the second end are respectively located at the center of the corresponding spherical surface.

[0017] In a preferred embodiment of the present invention, the smooth transition surface is formed by rotating a smooth curve around the central axis of the shell, and the two ends of the smooth curve are connected to the two spherical surfaces along the tangent direction of the ends of the two spherical surfaces respectively; the middle part of the smooth curve forms a transition arc 131 that is concave towards the central axis of the shell 1, and the diameter of the transition arc 131 is in the range of 250mm to 470mm, and the arc is in the range of π / 18 to π / 15.

[0018] In a preferred embodiment of the present invention, the data acquisition module includes a data acquisition and processing chip and the first sensor, wherein the data acquisition and processing chip is electrically connected to the first sensor and the data storage module respectively.

[0019] In a preferred embodiment of the present invention, the detection channel includes at least one first detection channel and at least one second detection channel, one end of the first detection channel extends to the outer surface of the first end, and one end of the second detection channel extends to the outer surface of the second end, so that the first sensor in the first detection channel and the first sensor in the second detection channel can respectively contact the fluid medium on both sides of the downhole packing tool.

[0020] In a preferred embodiment of the present invention, the housing includes a first housing and a second housing. The first housing is provided with a first groove, and the second housing is provided with a second groove. The first housing and the second housing are mated together and the first groove and the second groove are fitted together to form a receiving cavity. The data acquisition and processing chip and the data storage module are both placed in the receiving cavity. The end of the first housing away from the second housing forms the first end, and the end of the second housing away from the first housing forms the second end.

[0021] In a preferred embodiment of the present invention, the data acquisition module further includes a second sensor for measuring the motion parameters of the housing, the second sensor being electrically connected to the data acquisition and processing chip.

[0022] In a preferred embodiment of the present invention, the data acquisition device further includes a power supply module, which is integrated on the data acquisition and processing chip.

[0023] In a preferred embodiment of the present invention, the data acquisition device further includes a wireless transmission module, which is integrated on the data acquisition and processing chip and electrically connected to the data storage module to transmit the data stored in the data storage module via radio.

[0024] In a preferred embodiment of the present invention, the housing is a soluble housing, and the data acquisition device further includes a return body installed inside the soluble housing. The data storage module is disposed inside the return body. The return body can be released from the soluble housing into the fluid medium after the soluble housing dissolves and carries the data storage module back with the fluid medium.

[0025] In a preferred embodiment of the present invention, the data acquisition device has a first usage state and a second usage state;

[0026] In the first usage state, the soluble shell can be placed from the dispensing port to a preset detection position in the detection environment and can be dissolved by the fluid medium of the detection environment after a preset time, so that the return body can be released from the soluble shell into the fluid medium and carry the data storage module back to the dispensing port with the fluid medium;

[0027] In the second usage state, the soluble shell can be released from the dispensing port into the detection environment and reach the preset collection position before being dissolved by the fluid medium of the detection environment and releasing the return body.

[0028] In a preferred embodiment of the present invention, the data acquisition device further includes a conductive elastic structure, which is placed in a compressed state between the return body and the data acquisition module, and the return body is in contact with the conductive elastic structure. The data storage module is electrically connected to the data acquisition module through the conductive elastic structure.

[0029] In a preferred embodiment of the present invention, the data acquisition device further includes a reinforcing elastic structure, which is placed in a compressed state between the return body and the soluble shell, and the return body is in contact with the reinforcing elastic structure.

[0030] In a preferred embodiment of the present invention, the conductive elastic structure includes a plurality of spring pins arranged at intervals, and the reinforcing elastic structure includes a spring.

[0031] In a preferred embodiment of the invention, the return body returns with the fluid medium by utilizing the venting pressure of the fluid medium and / or the buoyancy of the fluid medium.

[0032] In a preferred embodiment of the present invention, the density of the material of the backflow body is less than 1 g / cm³. 3 .

[0033] In a preferred embodiment of the present invention, the material of the soluble shell is soluble aluminum or soluble magnesium alloy.

[0034] Secondly, the present invention also provides another data acquisition device, comprising:

[0035] The housing has a first end and a second end located at both ends of its central axis, and a middle section located between the first end and the second end. The outer surfaces of the first end and the second end are spherical surfaces with the same diameter, and the outer surface of the middle section is a spherical surface with a diameter larger than that of the spherical surfaces at the ends. The housing can be dropped into the ball seat of a downhole packer with either the first end or the second end facing forward and seal the ball seat.

[0036] A data acquisition module is installed inside the housing. Both the first and second ends of the housing are provided with detection channels. The data acquisition module has a data acquisition and processing chip and a first sensor located in the detection channel. The data acquisition and processing chip is electrically connected to the first sensor. The first sensor is used to detect fluid parameters on both sides of the downhole packing tool.

[0037] A data storage module, which is integrated into the data acquisition and processing chip;

[0038] Specifically, between the first end and the middle section, and between the middle section and the second end, the outer surface of the shell is a smooth transition surface that can smoothly connect two adjacent spherical surfaces.

[0039] In a preferred embodiment of the present invention, the data acquisition device further includes:

[0040] A wireless transmission module, integrated on the data acquisition and processing chip, is used to transmit the data stored in the data storage module via radio waves.

[0041] A power supply module, which is electrically connected to the data acquisition and processing chip.

[0042] In a preferred embodiment of the present invention, the housing is a soluble housing, and the data acquisition device further includes a return body, which is installed inside the soluble housing. The data storage module is disposed inside the return body, and the return body can be released from the soluble housing into the fluid medium after the soluble housing dissolves and carry the data storage module back with the fluid medium.

[0043] In a preferred embodiment of the present invention, the data acquisition device further includes a conductive elastic structure, which is placed in a compressed state between the return body and the data acquisition module, and the return body is in contact with the conductive elastic structure. The data storage module is electrically connected to the data acquisition module through the conductive elastic structure.

[0044] In a preferred embodiment of the present invention, the data acquisition device further includes a reinforcing elastic structure, which is placed in a compressed state between the return body and the soluble shell, and the return body is in contact with the reinforcing elastic structure.

[0045] Thirdly, the present invention also provides another data acquisition device, comprising:

[0046] The housing has a first end and a second end located at both ends of its central axis, and a middle section connecting the first end and the second end. The outer surfaces of the first end and the second end are spherical surfaces of the same diameter, and the outer surface of the middle section is a cylindrical side surface connecting the two spherical surfaces. The housing can be dropped into the ball seat of a downhole packer with either the first end or the second end facing forward and seal the ball seat.

[0047] A data acquisition module is installed inside the housing. Both the first and second ends of the housing are provided with detection channels. The data acquisition module has a data acquisition and processing chip and a first sensor located in the detection channel. The data acquisition and processing chip is electrically connected to the first sensor. The first sensor is used to detect fluid parameters on both sides of the downhole packing tool.

[0048] A data storage module, which is integrated into the data acquisition and processing chip.

[0049] In a preferred embodiment of the present invention, the data acquisition device further includes:

[0050] A wireless transmission module, integrated on the data acquisition and processing chip, is used to transmit the data stored in the data storage module via radio waves.

[0051] A power supply module, which is electrically connected to the data acquisition and processing chip.

[0052] In a preferred embodiment of the present invention, the housing is a soluble housing, and the data acquisition device further includes a return body, which is installed inside the soluble housing. The data storage module is disposed inside the return body, and the return body can be released from the soluble housing into the fluid medium after the soluble housing dissolves and carry the data storage module back with the fluid medium.

[0053] In a preferred embodiment of the present invention, the data acquisition device further includes a conductive elastic structure, which is placed in a compressed state between the return body and the data acquisition module, and the return body is in contact with the conductive elastic structure. The data storage module is electrically connected to the data acquisition module through the conductive elastic structure.

[0054] In a preferred embodiment of the present invention, the data acquisition device further includes a reinforcing elastic structure, which is placed in a compressed state between the return body and the soluble shell, and the return body is in contact with the reinforcing elastic structure.

[0055] Fourthly, the present invention also provides a downhole data acquisition method, which is implemented using the data acquisition device described above, and the downhole data acquisition method includes the following steps:

[0056] The casing is deployed from the wellhead downhole, and the casing can fall into the ball seat of the downhole packer with the first end or the second end facing forward and seal the ball seat;

[0057] The data acquisition module inside the housing collects fluid parameters on both sides of the downhole packer through the first sensor in the detection channel;

[0058] The data acquisition module transmits the fluid parameters to the data storage module.

[0059] In a preferred embodiment of the present invention, the data acquisition module further includes a second sensor, and the downhole data acquisition method further includes the following steps:

[0060] The data acquisition module inside the housing simultaneously measures the motion parameters of the housing through the second sensor.

[0061] In a preferred embodiment of the present invention, the data acquisition module further includes a data acquisition and processing chip, which is electrically connected to the first sensor, the second sensor and the data storage module respectively.

[0062] The fluid parameters include the pressure, temperature, salinity and / or pH of the downhole fluid, and the motion parameters include the displacement, velocity, acceleration, momentum and / or deflection angle of the casing.

[0063] The data transmitted to the data storage module includes the fluid parameters, the motion parameters, and the analysis parameters, analysis curves, and / or analysis images generated by the data acquisition and processing chip based on the above parameters.

[0064] In a preferred embodiment of the present invention, the data acquisition device further includes a wireless transmission module, which is electrically connected to the data storage module, and the downhole data acquisition method further includes the following steps:

[0065] The wireless transmission module transmits the data stored in the data storage module via radio waves, and the reading device installed at the wellhead or lowered into the well can receive the radio signals.

[0066] In a preferred embodiment of the present invention, the housing is a soluble housing, the data acquisition device further includes a return body installed inside the soluble housing, the data storage module is disposed inside the return body, and the downhole data acquisition method further includes the following steps:

[0067] After the shell is lowered into the well for a preset time, the soluble shell is dissolved by the downhole fluid, and the return body is released from the soluble shell and carries the data storage module back to the wellhead along with the downhole fluid.

[0068] In a preferred embodiment of the present invention, multiple soluble shells are sequentially deployed to multiple well sections or formations, and data from different well sections or formations are collected by the data acquisition modules within the multiple soluble shells; alternatively, the downhole packer is placed below the well section or formation to be fractured, and the ball seat of the downhole packer is sealed by deploying the soluble shells. Then, fracturing operations are performed in the well section or formation to be fractured, and data is collected during the fracturing operation by the data acquisition modules within the soluble shells.

[0069] Compared with the prior art, the present invention has the following features and advantages:

[0070] I. The data acquisition device of the present invention has a first end and a second end on the outer surface of its shell located at both ends of its central axis. A preferred shell structure is a gourd-shaped structure with one end larger than the other. The gourd-shaped structure can prevent the shell from continuously flipping in the wellbore during the lowering process and failing to sit and seal, thus enabling the data acquisition device of the present invention to simultaneously perform the functions of sealing the flow channel of the downhole packer and data acquisition, that is, to have integrated packer acquisition and anti-flipping functions. At the same time, due to its shape, the shell of the present invention will fall into the ball seat of the downhole packer with the first end or the second end facing forward to seal the ball seat. Therefore, the pressure, temperature or flow rate data on both sides of the downhole packer can be obtained simultaneously through the detection channels set at both ends, thereby determining the downhole parameters such as pressure, temperature or flow rate of the current fracturing section and adjacent fracturing sections during fracturing operations. Of course, the above technical objectives can also be achieved by using a spindle-shaped shell or a gourd-shaped shell with obvious two ends.

[0071] 2. The data acquisition device of the present invention has a gourd-shaped shell with two ends of obvious large and small diameters, which can simultaneously meet the needs of various downhole tools of different sizes (5.5in / 4.5in / 3.5in, etc.), and the volume is reduced by setting the small end to save body material, especially reducing soluble residue in soluble tools.

[0072] Third, the data acquisition device and downhole data acquisition method described in this invention do not require the use of tubing, casing, cables, steel wires, etc., and can be directly put into the well for pumping without adding any additional construction processes.

[0073] IV. The data acquisition device and downhole data acquisition method described in this invention provide two selectable data recovery methods. On the one hand, downhole data can be collected via wireless transmission; on the other hand, a soluble shell and a return body can be used to achieve melting and return recovery. The soluble shell method allows the data to dissolve spontaneously in the downhole environment, restoring wellbore flow and facilitating subsequent operations. It also features high pressure and high temperature resistance, making it suitable for ultra-deep wells and long horizontal sections.

[0074] V. The data acquisition device described in this invention can also be used for data acquisition in other detection environments such as oil and gas pipelines, underground pipelines, urban pipe networks, and mine tunnels, thereby achieving beneficial effects such as real-time detection of key data parameters such as pipeline blockage, leakage, water level, flow rate, pressure, fluid medium, water quality, gas content, and medium detection. Attached Figure Description

[0075] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0076] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, guided by the teachings of this invention, can select various possible shapes and proportions to implement the invention according to specific circumstances.

[0077] Figure 1 This is a schematic front cross-sectional view of the data acquisition device in this invention;

[0078] Figure 2 This is a diagram illustrating the usage status of the data acquisition device in this invention for downhole data acquisition.

[0079] Figure 3 This is a perspective view of the soluble shell in this invention;

[0080] Figure 4 This is a schematic diagram of the conductive elastic structure and the reinforced elastic structure in this invention;

[0081] Figure 5 This is a schematic front cross-sectional view of the shuttle-shaped data acquisition device in this invention;

[0082] Figure 6 This is a schematic front cross-sectional view of the capsule-shaped data acquisition device in this invention;

[0083] Figure 7 This is a schematic diagram of the structure of the shuttle-shaped data acquisition device in this invention, which realizes data recovery via radio.

[0084] Explanation of reference numerals in the attached figures:

[0085] 100. Data acquisition device;

[0086] 1. Shell / Soluble Shell; 11. First End; 111. First Spherical Surface; 12. Second End; 121. Second Spherical Surface; 13. Smooth Transition Surface; 131. Transition Arc; 14. First Shell; 15. Second Shell; 16. Receiving Cavity; 161. First Groove; 162. Second Groove; 17. Detection Channel; 171. First Detection Channel; 172. Second Detection Channel; 173. Mounting Channel; 174. Fluid Channel; 18. Threaded Connection Structure; 19. Wire Passage Channel;

[0087] 2. Data acquisition module; 21. Data acquisition and processing chip; 22. First sensor; 23. Wire; 24. Wireless transmission module;

[0088] 3. Return body; 31. Data storage module;

[0089] 4. Power supply module;

[0090] 5. Conductive elastic structure; 51. Spring-loaded ejector pin;

[0091] 6. Reinforce the elastic structure; 61. Spring;

[0092] 7. Shell sealing structure;

[0093] 8. Snap ring;

[0094] 200. Downhole packing tool; 201. Ball seat; 202. Rubber sleeve; 203. Flow channel; 204. Spherical seat;

[0095] 300, sleeve;

[0096] 400. Shuttle-shaped data acquisition device; 401. Middle section; 402. Third spherical surface;

[0097] 500. Capsule-shaped data acquisition device; 501. Middle section; 502. Cylindrical side surface;

[0098] 600. Read short section; 601. Cable;

[0099] 700. Ground. Detailed Implementation

[0100] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0101] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0102] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0103] Implementation Method 1:

[0104] like Figure 1 and Figure 2 As shown, the present invention provides a data acquisition device 100, which includes a housing 1, a data acquisition module 2, and a data storage module 31. The housing 1 has a first end 11 and a second end 12 located at both ends of its central axis. The outer surfaces of the first end 11 and the second end 12 are spherical surfaces with different diameters. The housing 1 can fall into the ball seat 201 of the downhole packer 200 with either the first end 11 or the second end 12 facing forward and seal the ball seat 201. The data acquisition module 2 is installed inside the housing 1. Both the first end 11 and the second end 12 of the housing 1 are provided with detection channels 17. The data acquisition module 2 has a first sensor 22 located in the detection channel 17. The first sensor 22 is used to detect fluid parameters on both sides of the downhole packer 200. The data storage module 31 is electrically connected to the data acquisition module 2.

[0105] The data acquisition device 100 of this invention has a housing 1 with distinct ends to prevent it from flipping repeatedly in the wellbore during the lowering process and failing to settle properly for sealing. Simultaneously, the housing 1 integrates data acquisition functionality, meaning the data acquisition device 100 possesses integrated sealing and acquisition capabilities as well as anti-flipping functionality. Furthermore, due to its shape, the housing 1 will fall into the ball seat 201 of the downhole packer 200 with either the first end 11 or the second end 12 facing forward to seal the ball seat 201. Therefore, the detection channels 17 at both ends of the housing 1 can simultaneously acquire data such as pressure, temperature, or flow rate on both sides of the downhole packer 200, thereby determining downhole parameters such as pressure, temperature, or flow rate of the current fracturing section and adjacent fracturing sections during fracturing operations.

[0106] like Figure 1As shown above, the data acquisition device 100 can replace the plugging ball to seal the ball seat 201 of the downhole packer 200. That is, the housing 1 can fall into the ball seat 201 of the downhole packer 200 and seal it, thereby enabling downhole data acquisition from both sides of the downhole packer 200. The downhole packer 200 also includes a rubber sleeve 202 or a metal sealing ring fitted outside the ball seat 201 to seal the annulus between the ball seat 201 and the casing 300 of the wellbore. The more specific structure of the downhole packer 200 is the same as in the prior art and will not be described in detail here.

[0107] Of course, the data acquisition device 100 of the present invention also has similar beneficial effects when applied to data acquisition in other detection environments such as oil and gas pipelines, underground pipelines, and mine tunnels. Therefore, the data acquisition device 100 of the present invention can also realize the monitoring of urban underground pipe networks and the real-time detection of key data parameters such as underground pipe blockage, leakage, pipe network water level, flow rate, pressure, and water quality.

[0108] The following will describe the specific structure of each part of the data acquisition device 100 described in this invention, as well as the position and connection relationship between each part.

[0109] The data acquisition device 100 of the present invention has a housing 1, which includes a first housing 14 and a second housing 15. The first housing 14 has a first groove 161, and the second housing 15 has a second groove 162. The first housing 14 and the second housing 15 are mated together, and the first groove 161 and the second groove 162 are mated to form a receiving cavity 16. The receiving cavity 16 is used to accommodate a data acquisition module 2 and a data storage module 31. The end of the first housing 14 away from the second housing 15 forms a first end 11, and the end of the second housing 15 away from the first housing 14 forms a second end 12. The first housing 14 and the second housing 15 are provided with mating male and female fasteners, which are connected by a threaded connection structure 18. In order to ensure the airtightness of the receiving cavity 16, a housing sealing structure 7 is provided at the mating position of the first housing 14 and the second housing 15. The housing sealing structure 7 includes a sealing gasket sandwiched between the first housing 14 and the second housing 15.

[0110] The outer surface of the first end 11 is a first spherical surface 111, and the outer surface of the second end 12 is a second spherical surface 121, with the diameter of the first spherical surface 111 being larger than the diameter of the second spherical surface 121. This design of large and small spherical surfaces ensures that after the casing 1 is continuously rotated downhole, it can fall into the ball seat 201 of the downhole packing tool 200 with either the first end 11 or the second end 12 facing forward, thus sealing the ball seat 201.

[0111] The detection channels 17 on the first end 11 and the second end 12 of the housing 1 include at least one first detection channel 171 and at least one second detection channel 172. The first detection channel 171 is formed inside the first housing 14, and the second detection channel 172 is formed inside the second housing 15. One end of the first detection channel 171 extends to the outer surface of the first end 11, and the other end of the first detection channel 171 is connected to the receiving cavity 16 inside the housing 1; one end of the second detection channel 172 extends to the outer surface of the second end 12, and the other end of the second detection channel 172 is connected to the receiving cavity 16 inside the housing 1.

[0112] The shape and size of the first groove 161 and the second groove 162 are not specifically limited; they can be rectangular, square, circular, or other shapes, as long as the accommodating cavity 16 formed by their mating can meet the accommodating requirements, that is, it can accommodate the data acquisition module 2 and the data storage module 31. In this embodiment, both the first groove 161 and the second groove 162 are rectangular or circular grooves with a diameter or side length ranging from 8mm to 48mm and a depth ranging from 10mm to 48mm; the second groove 162 is also a rectangular or circular groove with a diameter or side length ranging from 8mm to 48mm and a depth ranging from 10mm to 48mm.

[0113] The data acquisition device 100 of the present invention further includes a data acquisition module 2, such as... Figure 2 As shown, the data acquisition module 2 is installed inside the housing 1, and the data acquisition module 2 has a first sensor 22 installed in the detection channel 17. The first sensor 22 is installed in both the first detection channel 171 and the second detection channel 172. The first sensor 22 in the first detection channel 171 and the first sensor 22 in the second detection channel 172 can respectively contact the fluid medium on both sides of the downhole packing tool 200.

[0114] The downhole packer 200 is sealed by the housing 1. A first detection channel 171 and a second detection channel 172 are respectively set at the first end 11 and the second end 12 of the housing 1. A first sensor 22 is installed in both detection channels 17, so that the fluid parameters on both sides of the downhole packer 200 can be measured. By analyzing the fluid parameters on both sides, the sealing effectiveness of the downhole packer 200 and the downhole construction conditions can be determined. For example, if the front of the downhole packer 200 is a fractured section or fractured layer, and the rear of the downhole packer 200 is a section or layer to be fractured, if the fluid pressure on both sides of the downhole packer 200 is equal, then the downhole packer 200 is judged to have failed.

[0115] The first sensor 22 is capable of measuring fluid parameters by contacting a fluid medium. The fluid parameters include the pressure, temperature, salinity, and / or pH of the downhole fluid. Optionally, the fluid parameters may also include flow rate, fluid characteristics, composition, density, resistivity, and / or gas content.

[0116] Furthermore, such as Figure 1 and Figure 2 As shown, the data acquisition module 2 includes a data acquisition and processing chip 21 and multiple first sensors 22. The data acquisition and processing chip 21 is fixed inside the housing cavity 16 of the housing 1 and is electrically connected to the multiple first sensors 22 via wires 23. The first sensors 22 measure downhole fluid parameters, and the data acquisition and processing chip 21 records these fluid parameters and processes them to generate analytical parameters, analytical curves, and / or analytical images. Therefore, the downhole data acquired by the data acquisition module 2 and transmitted to the data storage module 31 may include only the analytical parameters, analytical curves, and / or analytical images generated by the data acquisition and processing chip 21 based on the fluid parameters, and may also include the fluid parameters themselves measured by the first sensors 22. The first sensors 22 can also be electrically connected to the data acquisition and processing chip 21 via wireless communication.

[0117] In other embodiments of the present invention, the data acquisition and processing chip 21 may be omitted, and only the first sensor 22 may be provided. The first sensor 22 is electrically connected to the data storage module 31. The fluid parameters measured by the first sensor 22 are directly transmitted to the data storage module 31 for storage. After the data storage module 31 is retrieved or the fluid data is transmitted to the wellhead, the fluid parameters are analyzed and processed by the ground 700 analysis device.

[0118] Better, such as Figure 2As shown, the detection channel 17 includes a mounting channel 173. The sensor is fixed in the mounting channel 173 by a snap ring 8. To ensure the airtightness of the receiving cavity 16 and prevent fluid medium from flowing into the receiving cavity 16 from the mounting channel 173, a channel sealing structure is provided between the sensor and the mounting channel 173. The channel sealing structure includes multiple sealing rings spaced apart along the axial direction of the mounting channel 173 and fitted onto the sensor. The detection channel 17 may also include one or more fluid channels 174. One end of the fluid channel 174 is connected to the mounting channel 173, and the other end of the fluid channel 174 extends to the outer surface of the housing 1, allowing external fluid medium to flow into the fluid channel 174 and contact the first sensor 22 in the mounting channel 173. The mounting channel 173 of the detection channel 17 can be directly connected to the receiving cavity 16. For example, the mounting channel 173 of the first detection channel 171 is directly connected to the first groove 161. The remaining space in the receiving cavity 16 is used to lay the wire 23 between the first sensor 22 and the data acquisition and processing chip 21. The mounting channel 173 of the detection channel 17 can be connected to the receiving cavity 16 through the wire passage 19. For example, the mounting channel 173 of the second detection channel 172 is connected to the second groove 162 through the wire passage 19. The remaining space in the receiving cavity 16 and the wire passage 19 are used to lay the wire 23 between the first sensor 22 and the data acquisition and processing chip 21.

[0119] The data acquisition device 100 of the present invention further includes a data storage module 31, such as... Figure 2 As shown, the data storage module 31 is installed and fixed in the receiving cavity 16 within the housing 1. The data storage module 31 is electrically connected to the data acquisition and processing chip 21. Fluid parameters collected by the first sensor 22 in the data acquisition module 2 can be transmitted to the data storage module 31 for storage. Data processed by the data acquisition and processing chip 21 in the data acquisition module 2 can also be transmitted to the data storage module 31 for storage. How to retrieve the data stored in the downhole data storage module 31 to the wellhead for processing by operators will be explained in detail below.

[0120] The structure and technical effects of the preferred embodiment of the data acquisition device 100 of the present invention will be further described below.

[0121] According to one embodiment of the present invention, such as Figure 2 and Figure 3 As shown, between the first end 11 and the second end 12, the outer surface of the shell 1 is a smooth transition surface 13 that can smoothly connect the two spherical surfaces, so that the shell 1 is gourd-shaped.

[0122] Specifically, the curvature of the first sphere 111 ranges from 5π / 4 to 7π / 5, and the curvature of the second sphere 121 ranges from 4π / 5 to π; the first sphere 111 and the second sphere 121 are connected by a smooth transition surface 13. Figure 2 and Figure 3 As shown, in the embodiment of the present invention, the diameter of the first spherical surface 111 ranges from 55mm to 90mm; the diameter of the second spherical surface 121 ranges from 35mm to 65mm. The centers of both the first spherical surface 111 and the second spherical surface 121 are located on the central axis of the housing 1. The first detection channel 171 is located at the center of the first spherical surface 111, and the second detection channel 172 is located at the center of the second spherical surface 121. The smooth transition surface 13 is formed by rotating a smooth curve around the central axis of the housing 1. One end of the smooth curve connects to the first spherical surface 111 along the tangent direction of the end of the first spherical surface 111, and the other end of the smooth curve connects to the second spherical surface 121 along the tangent direction of the end of the second spherical surface 121. The middle portion of the smooth curve generally forms a transition arc 131 that is concave towards the central axis of the housing 1. The diameter of this transition arc 131 ranges from 250mm to 470mm, and the arc ranges from π / 18 to π / 15. Of course, a smooth curve can also be made using straight lines with transition sections at both ends.

[0123] According to one embodiment of the present invention, such as Figure 1 As shown, the ball seat 201 of the downhole packing tool 200 is provided with a flow channel 203 for the flow of downhole fluid media. The flow channel 203 has a seated spherical surface 204. The inner diameter of the seated spherical surface 204 is gradually reduced along the insertion direction of the housing 1. The diameter of the first spherical surface 111 is less than or equal to the maximum inner diameter D1 of the seated spherical surface 204 and greater than the minimum inner diameter D2 of the seated spherical surface 204. The diameter of the second spherical surface 121 is less than the minimum inner diameter D2 of the seated spherical surface 204. Thus, when the soluble shell 1 falls into the ball seat 201 of the downhole packer 200 with the first end 11 facing forward, the first spherical surface 111 is inserted into the seat spherical surface 204 to block the flow channel 203. When the shell 1 falls into the ball seat 201 of the downhole packer 200 with the second end 12 facing forward, the second spherical surface 121 passes through the seat spherical surface 204 and is inserted into the seat spherical surface 204 through the smooth transition surface 13 or the first spherical surface 111 to block the flow channel 203.

[0124] According to one embodiment of the present invention, the data acquisition module 2 further includes a second sensor for measuring the motion parameters of the housing 1, and the second sensor is electrically connected to the data acquisition and processing chip 21.

[0125] Specifically, the second sensor is housed within the housing 1, for example, it can be installed and fixed within the receiving cavity 16 (not shown in the figure) of the housing 1. The second sensor is used to measure the motion parameters of the housing 1. These motion parameters include those generated during the deployment process of the housing 1, and also those generated after the housing 1 reaches the preset detection position (the ball seat 201 of the downhole packer 200). The motion parameters include the displacement, velocity, acceleration, momentum, and / or deflection angle of the soluble housing 1. The installation method of the second sensor is not specifically limited; it can be installed in the detection channel 17 in contact with the fluid medium, or it can be sealed within the housing 1. The data acquisition and processing chip 21 can also process the motion parameters detected by the second sensor to generate analysis parameters, analysis curves, and / or analysis images; simultaneously, it transmits the motion parameters and analysis results to the data storage module 31 for storage. The second sensor can be electrically connected to the data acquisition and processing chip 21 via wired or wireless communication.

[0126] According to one embodiment of the present invention, such as Figure 2 As shown, the data acquisition device 100 also includes a power supply module 4, which is integrated on the data acquisition and processing chip 21.

[0127] Specifically, the power supply module 4 can be integrated into the data acquisition and processing chip 21 to supply power to the data acquisition and processing chip 21, and to supply power to the data storage module 31, the first sensor 22, and the second sensor through the data acquisition and processing chip 21. The power supply module 4 includes one or more batteries, which can be connected in series or in parallel. Alternatively, the power supply module 4 can be located in other positions within the receiving cavity 16 or embedded in the wall of the housing 1. Furthermore, the power supply module 4 can be electrically connected to the data acquisition and processing chip 21, the data storage module 31, the first sensor 22, and the second sensor, respectively.

[0128] According to one embodiment of the present invention, the data acquisition device 100 further includes a wireless transmission module 24, which is integrated on the data acquisition and processing chip 21 and electrically connected to the data storage module 31 to transmit the data stored in the data storage module 31 via radio.

[0129] The data acquisition device 100 of the present invention realizes downhole data transmission and retrieval via radio, without the need for working tools such as oil pipes, cables, and steel wires. The housing 1 is directly placed at the preset detection position in the detection environment, thereby collecting data such as temperature and pressure at the preset detection position through the internal data acquisition module 2 and storing it through the internal data storage module 31, and then transmitting the data through the wireless transmission module 24.

[0130] Specifically, the wireless transmission module 24 can be integrated into the data acquisition and processing chip 21, and the wireless transmission module 24 is electrically connected to the data storage module 31. The data storage module 31 can transmit data to the wireless transmission module 24 and transmit it wirelessly. The reading device installed at the wellhead or lowered into the well can receive the radio signal, thereby realizing the recovery of downhole data. Of course, the wireless transmission module 24 can also be installed in other locations of the receiving cavity 16 or buried in the wall of the housing 1, or a corresponding radio transmission channel can be opened on the housing 1, and the wireless transmission module 24 can be installed in the radio transmission channel. No specific limitation is made here.

[0131] According to one embodiment of the present invention, the housing 1 is a soluble housing 1, and the data acquisition device 100 further includes a return body 3, which is installed inside the soluble housing 1. The data storage module 31 is disposed inside the return body 3. The return body 3 can be released from the soluble housing 1 into the fluid medium after the soluble housing 1 is dissolved and carry the data storage module 31 back with the fluid medium.

[0132] The data acquisition device 100 of the present invention achieves downhole data recovery through a melting and return method, eliminating the need for working tools such as tubing, cables, and steel wires. The soluble shell 1 is directly placed into a preset detection location in the detection environment, whereby the internal data acquisition module 2 collects data such as temperature and pressure, which is then stored in the data storage module 31 of the internal return body 3. After a preset time, the soluble shell 1 is dissolved by the fluid medium of the detection environment, causing the internal return body 3 to be released and carrying the data storage module 31 back to the delivery port with the fluid medium. Thus, by collecting the return body 3 and retrieving the data storage module 31, the data can be read without the need for additional processes.

[0133] The return body 3 can return to the release port with the fluid medium using the venting pressure and / or buoyancy of the fluid medium. Specifically, a hydraulic pump pumps the liquid into the well and pushes the soluble shell 1 down to a preset detection position in the well. Then, the wellhead valve is closed. After a preset time, that is, after the data acquisition operation is completed, the wellhead valve is opened to vent the fluid medium, thereby generating venting pressure in the well. The density of the return body 3 is less than that of the fluid medium, so the return body 3 can float after being released from the soluble shell 1.

[0134] Specifically, the conventional shell 1 can be made of various common materials such as steel, resin, plastic, and rubber. However, in this embodiment, the soluble shell 1 is made of soluble aluminum or soluble magnesium alloy. That is, the first shell 14 and the second shell 15 can be made wholly or partially of soluble metal. Alternatively, depending on the characteristics of the fluid medium, other materials soluble in the fluid medium can be used to make the soluble shell 1. The soluble shell 1 is not limited to completely dissolving after a preset time to release the return body 3; it can also partially dissolve after a preset time to form a release port, allowing the return body 3 to be released from this port. A screen can be installed at the release port to capture and collect the returned return body 3. In this embodiment of the invention, the preset time is four to ten hours.

[0135] Specifically, the density of the material in return body 3 is less than 1 g / cm³. 3 In this embodiment, the density of the return body 3 is 0.5 g / cm³. 3 ~0.9g / cm 3 The return body 3 can be made of lightweight materials such as plastic alloy, polyester fiber, or resin to meet the required density; or it can be a hollow shell filled with lightweight material to meet the required density. Furthermore, to ensure that the return body 3 can carry the data storage module 31 back to the delivery port and to minimize the volume of the return body 3, in embodiments of the present invention, the diameter or side length of the return body 3 is 10mm to 45mm.

[0136] like Figure 1 and Figure 2 As shown, the data acquisition device 100, which uses a soluble shell 1 and a flowback body 3, can be applied to downhole data acquisition, especially for deep wells and long horizontal sections. The detection environment is the downhole environment, and the deployment port is the wellhead. The preset detection location downhole can be any location within any well section or formation. Alternatively, a downhole packer 200 can be installed at the preset detection location downhole for packing. Then, the data acquisition device 100 (i.e., the soluble shell 1 containing the flowback body 3 and the data acquisition module 2) can be deployed from the wellhead to the downhole packer 200, and downhole data acquisition can be performed through the internal data acquisition module 2. The data is collected and transmitted to the data storage module 31 for storage. After the soluble shell 1 dissolves, the return body 3 carries the data storage module 31 back to the delivery port. The data storage module 31 can then be retrieved by collecting the return body 3, and the data can be read using a surface reading device. Therefore, the data acquisition device 100 can be lowered and the data storage module 31 can be retrieved without other operating tools or additional processes, thereby achieving downhole data acquisition. This provides intuitive data basis for rapid formation interpretation and evaluation, reservoir stimulation effect analysis and judgment, wellbore operation identification and analysis, and production status interpretation and evaluation.

[0137] According to one embodiment of the present invention, such as Figure 1 and Figure 2 As shown, the data acquisition device 100 has a first usage state and a second usage state. In the first usage state, the soluble shell 1 can be placed from the dispensing port to a preset detection position in the detection environment and can be dissolved by the fluid medium of the detection environment after a preset time, so that the return body 3 can be released from the soluble shell 1 into the fluid medium and carry the data storage module 31 back to the dispensing port with the fluid medium. In the second usage state, the soluble shell 1 can be placed from the dispensing port into the detection environment and reach the preset collection position before the return body 3 is released by the fluid medium of the detection environment.

[0138] Specifically, the first usage state is the return release stage described above. When the detection environment facilitates setting a preset collection location, it is not necessary to return the data storage module 31 back to the delivery port by releasing the return body 3. In this case, the second usage state can be adopted. For example, when the detection environment is a pipeline with an input port and an output port, the input port of the pipeline can be used as the delivery port, and the output port of the pipeline can be used as the collection port of the preset collection location. Thus, by controlling the dissolution of the soluble shell 1, the return body 3 will not be released due to dissolution by the fluid medium during the process of being transported from the delivery port to the collection port.

[0139] According to one embodiment of the present invention, such as Figure 2 As shown, the data acquisition device 100 also includes a conductive elastic structure 5, which is placed in a compressed state between the return body 3 and the data acquisition module 2, and the return body 3 and the conductive elastic structure 5 are in contact. The data storage module 31 is electrically connected to the data acquisition module 2 through the conductive elastic structure 5.

[0140] Specifically, one side of the return body 3 abuts against the data acquisition module 2, and the other side of the return body 3 abuts against the soluble shell 1, thereby limiting the return body 3 within the receiving cavity 16 and electrically connecting the data storage module 31 and the data acquisition module 2. This allows the return body 3 to separate from the data acquisition module 2 and be released from the receiving cavity 16 after the soluble shell 1 is dissolved. However, to ensure the successful release of the return body 3, such as... Figure 4 As shown, the data acquisition device 100 also includes a conductive elastic structure 5. The conductive elastic structure 5 is placed in a compressed state between the return body 3 and the data acquisition module 2, and the return body 3 is in contact with the conductive elastic structure 5. The data storage module 31 is electrically connected to the data acquisition module 2 through the conductive elastic structure 5. When the soluble shell 1 is dissolved, causing one side of the return body 3 to lose its limiting force, the return body 3 will be released from the receiving cavity 16 under the action of the elastic restoring force of the conductive elastic structure 5.

[0141] Specifically, the conductive elastic structure 5 includes multiple spring pins 51 arranged at intervals, or other elastic structures made of conductive material. There can be two to ten spring pins 51. One end of each spring pin 51 can be fixed to the data acquisition and processing chip 21 by welding or other fixed connection methods, while the other end of the spring pin 51 abuts against the return body 3 and is electrically connected to the internal data storage module 31. The return body 3 can be provided with multiple limiting grooves that cooperate with the ends of the multiple spring pins 51, allowing the ends of the multiple spring pins 51 to directly abut against the internal data storage module 31 for data and current transmission. Alternatively, the return body 3 can be provided with multiple conductive parts connected to the data storage module 31, with the ends of the multiple spring pins 51 abutting against the multiple conductive parts. Alternatively, the hollow shell 1 of the return body 3 can be made of conductive material and electrically connected to the data storage module 31, with the ends of the multiple spring pins 51 abutting against the hollow shell 1 of the return body 3.

[0142] According to one embodiment of the present invention, such as Figure 2 As shown, the data acquisition device 100 also includes a reinforcing elastic structure 6, which is placed in a compressed state between the return body 3 and the soluble shell 1, and the return body 3 and the reinforcing elastic structure 6 are in contact.

[0143] Specifically, such as Figure 4 As shown, to further improve the reliability of the release of the return body 3, the data acquisition device 100 also includes a reinforcing elastic structure 6. The reinforcing elastic structure 6 is placed in a compressed state between the return body 3 and the soluble shell 1, and the return body 3 is in contact with the reinforcing elastic structure 6. By setting the reinforcing elastic structure 6, when the soluble shell 1 is dissolved and one side of the reinforcing elastic structure 6 loses its limiting force, it will release an elastic restoring force, thereby pressing the return body 3 down toward the conductive elastic structure 5 and increasing the degree of compression of the conductive elastic structure 5. This will release a greater elastic restoring force to push the return body 3 out of the receiving cavity 16.

[0144] The reinforced elastic structure 6 includes a spring 61, but it can also be other elastic components. For example... Figure 2 As shown, the first groove 161 has a first stepped surface, and the second groove 162 has a second stepped surface. The data acquisition and processing chip 21, the conductive elastic structure 5, the return body 3, and the reinforcing elastic structure 6 are confined between the second stepped surface and the first stepped surface in the axial direction of the soluble shell 1. Figure 4 As shown, the data acquisition and processing chip 21, the conductive elastic structure 5, the return body 3, and the reinforcing elastic structure 6 are confined in the axial direction of the soluble shell 1 between the bottom surface of the second groove 162 and the bottom surface of the first groove 161.

[0145] In summary, the data acquisition device 100 of the present invention has at least the following beneficial effects:

[0146] First, the shell 1 of the present invention is designed as a large and small spherical surface with a smooth transition surface. When the shell 1 is used in the environment of the downhole casing 300, the outer diameter of the entire shell 1 does not exceed the inner diameter of the casing 300. Compared with other non-spherical shell 1 structures, it is shorter in length and smaller in volume.

[0147] Secondly, the shell 1 of this invention is designed as a combination of large and small spherical surfaces with a smooth transition surface. The large and small spherical surfaces are located at both ends of the shell along the central axis. The shell has distinct left and right ends, and a first sensor 22 is installed at each end. When the shell 1 enters the downhole casing 300, it continuously rotates. When it finally sits on the spherical surface 204, either the large-diameter spherical surface (first spherical surface 111) or the small-diameter spherical surface (second spherical surface 121) can maintain the other spherical surface in the opposite position on the central axis. During reservoir stimulation construction, the sealing effect produced by the downhole packer 200 can be effectively judged. That is, if the pressure difference between the left and right ends of the shell 1 (the two ends of the downhole packer 200) is different, it indicates that the downhole packer 200 is effective in sealing; conversely, if there is no pressure difference between the left and right ends of the shell 1 (the two ends of the downhole packer 200), it indicates that the sealing has failed. Furthermore, during fracturing operations, downhole parameters such as pressure, temperature, or flow rate of the current fracturing section and adjacent fracturing sections can be determined. After fracturing is completed and the data storage module 31 is recovered through blowout and backflow, the downhole parameters during the fracturing operation can be read to analyze and judge the sealing effectiveness of the downhole packer 200 and the downhole operation conditions, effectively solving the problem that existing downhole acquisition devices cannot analyze and judge the sealing effect of reservoir stimulation packers.

[0148] Third, the shell 1 of the present invention is designed with large and small spherical surfaces plus a smooth transition surface. If the large diameter spherical surface (first spherical surface 111) and the small diameter spherical surface (second spherical surface 121) do not fall on the sitting spherical surface 204 when the shell is seated, the smooth transition surface can ensure that the spherical surface falls on the sitting spherical surface 204 through relative sliding, so as to collect data such as pressure and temperature on both sides normally.

[0149] Fourth, by employing a design where the data storage module 31 is integrated into the return body 3, and the return body 3 is integrated into the data acquisition device 100, the present invention minimizes the volume of the return body 3. After the soluble shell 1 dissolves, the return body 3 can return to the wellhead with the venting pressure. Furthermore, after capturing the return body 3, the data storage module 31 can be retrieved, allowing the downhole data stored in the data storage module 31 to be read, thus improving the reliability of the return body 3's return to the delivery port. This effectively solves the problems of difficulty, low reliability, and poor feasibility in the commonly used return methods where large-size spheres are difficult to return in deep wells, long horizontal wells, and wells with low formation pressure.

[0150] Fifth, by filling the interior of the return body 3 with lightweight materials or by using lightweight materials, the present invention can effectively reduce the overall weight of the return body 3, making its density less than that of the downhole fluid medium, so that it can float in the liquid and be easily returned after blowout.

[0151] Sixth, by setting a compressed conductive elastic structure 5 between the return body 3 and the data acquisition module 2, the present invention can not only realize the electrical connection between the data acquisition module 2 and the data storage module 31, but also push the return body 3 out by the elastic restoring force of the conductive elastic structure 5 after the soluble shell 1 is dissolved.

[0152] Seventh, by setting a reinforced elastic structure 6 in a compressed state between the return body 3 and the soluble shell 1, the present invention can further improve the elastic recovery force generated by the conductive elastic structure 5 after the shell 1 is dissolved, ensuring that the return body 3 can be successfully pushed out and released into the wellbore.

[0153] Implementation Method Two:

[0154] The present invention also provides a shuttle-shaped data acquisition device 400, such as Figure 5 As shown, it includes a housing 1, a data acquisition module 2, a wireless transmission module 24, and a power supply module 4. The housing 1 has a first end 11 and a second end 12 located at both ends of its central axis. The housing 1 also has a middle section 401 located between the first end 11 and the second end 12. The outer surfaces of the first end 11 and the second end 12 are spherical surfaces with the same diameter. The outer surface of the middle section 401 is a spherical surface with a diameter larger than that of the end spherical surfaces. The housing 1 can fall into the ball seat 201 of the downhole packer 200 with either the first end 11 or the second end 12 facing forward and seal the ball seat 201. The data acquisition module 2 is installed inside the housing 1. The first end 11 and the second end 12 of the housing 1 are both provided with detection channels 17. The data acquisition module 2 has a data acquisition and processing chip 21 and a first sensor 22 located in the detection channel 17. The data acquisition and processing chip 21 is electrically connected to the first sensor 22. The first sensor 22 is used to detect the fluid parameters on both sides of the downhole packer 200. The data storage module 31 is integrated into the data acquisition and processing chip 21.

[0155] The spindle-shaped data acquisition device 400 of this invention has a housing 1 that is spindle-shaped with distinct ends. This prevents the housing 1 from flipping repeatedly in the wellbore during the lowering process and failing to sit properly for sealing. Simultaneously, the housing 1 integrates data acquisition functionality, meaning the spindle-shaped data acquisition device 400 possesses integrated sealing and acquisition capabilities as well as anti-flipping functionality. Furthermore, due to its shape, the housing 1 will fall into the ball seat 201 of the downhole packer 200 with either the first end 11 or the second end 12 facing forward to seal the ball seat 201. Therefore, the detection channels 17 at both ends can simultaneously acquire data such as pressure, temperature, or flow rate on both sides of the downhole packer 200, thereby determining downhole parameters such as pressure, temperature, or flow rate of the current fracturing section and adjacent fracturing sections during fracturing operations.

[0156] Specifically, such as Figure 5 As shown, the spindle-shaped data acquisition device 400 has a housing 1, which includes a first housing 14 and a second housing 15. The first housing 14 is provided with a first groove 161, and the second housing 15 is provided with a second groove 162. The first housing 14 and the second housing 15 are mated together, and the first groove 161 and the second groove 162 are fitted together to form a receiving cavity 16. The receiving cavity 16 is used to accommodate the data acquisition module 2, the data storage module 31, the wireless transmission module 24, and the power supply module 4. The end of the first housing 14 away from the second housing 15 forms a first end 11, and the end of the second housing 15 away from the first housing 14 forms a second end 12. The mating position of the first housing 14 and the second housing 15 forms a middle section 401.

[0157] The outer surface of the first end 11 is a first spherical surface 111, the outer surface of the second end 12 is a second spherical surface 121, and the outer surface of the middle section 401 is a third spherical surface 402. The diameter of the first spherical surface 111 is equal to the diameter of the second spherical surface 121, and the diameter of the third spherical surface 402 is greater than the diameter of the first spherical surface 111.

[0158] Between the first end 11 and the middle section 401, and between the middle section 401 and the second end 12, the outer surface of the shell 1 is a smooth transition surface 13 that connects two adjacent spherical surfaces smoothly, so that the shell 1 is spindle-shaped. The centers of the first spherical surface 111 and the second spherical surface 121 are both located on the central axis of the shell 1, and the smooth transition surface 13 is formed by rotating a smooth curve around the central axis of the shell 1. Taking the smooth transition surface 13 between the first spherical surface 111 and the third spherical surface 402 as an example, one end of the smooth curve is connected to the first spherical surface 111 along the tangent direction of the end of the first spherical surface 111, and the other end of the smooth curve is connected to the third spherical surface 402 along the tangent direction of the end of the third spherical surface 402. The middle part of the smooth curve is generally a transition arc that is concave towards the central axis of the shell 1. Of course, the smooth curve can also be a straight line with transition parts at both ends.

[0159] Furthermore, the detection channels 17 on the first end 11 and the second end 12 include at least one first detection channel 171 and at least one second detection channel 172. The first detection channel 171 is formed within the first housing 14, and the second detection channel 172 is formed within the second housing 15. One end of the first detection channel 171 extends to the outer surface of the first end 11, and the other end of the first detection channel 171 communicates with the receiving cavity 16 within the housing 1. One end of the second detection channel 172 extends to the outer surface of the second end 12, and the other end of the second detection channel 172 communicates with the receiving cavity 16 within the housing 1. The first detection channel 171 is located at the center of the first spherical surface 111, and the second detection channel 172 is located at the center of the second spherical surface 121.

[0160] The data acquisition module 2 is housed inside the housing 1, and the data acquisition module 2 has a data acquisition and processing chip 21 installed and fixed in the receiving cavity 16 and a first sensor 22 installed in the detection channel 17. The first sensor 22 is installed in both the first detection channel 171 and the second detection channel 172, and both first sensors 22 are connected to the data acquisition and processing chip 21 through wires 23. The first sensor 22 in the first detection channel 171 and the first sensor 22 in the second detection channel 172 can respectively contact the fluid medium on both sides of the downhole packer 200, thereby measuring the fluid parameters on both sides of the downhole packer 200.

[0161] The data storage module 31 is integrated on the data acquisition and processing chip 21. The data storage module 31 is electrically connected to the data acquisition and processing chip 21. The fluid parameters collected by the first sensor 22 in the data acquisition module 2 can be transmitted to the data storage module 31 for storage. The data after analysis and processing by the data acquisition and processing chip 21 in the data acquisition module 2 can also be transmitted to the data storage module 31 for storage.

[0162] In an optional embodiment, the shuttle-shaped data acquisition device 400 can achieve downhole data transmission and retrieval via radio, and it also includes a wireless transmission module 24 and a power supply module 4. Figure 5 As shown, the wireless transmission module 24 is integrated on the data acquisition and processing chip 21. The wireless transmission module 24 is electrically connected to the data storage module 31 to transmit the data stored in the data storage module 31 wirelessly. The power supply module 4 can be installed and fixed in the receiving cavity 16, and is electrically connected to the data storage module 31 and the wireless transmission module 24 via the wire 23 to supply power to both. Alternatively, the power supply module 4 can be integrated into the data acquisition and processing chip 21 to supply power to the data acquisition and processing chip 21, and to supply power to the data storage module 31, the first sensor 22, and the wireless transmission module 24 through the data acquisition and processing chip 21.

[0163] In another alternative embodiment, the shuttle-shaped data acquisition device 400 can also achieve downhole data recovery through a melting and return method (not shown in the figure, the melting and return method is basically the same as the structure in Embodiment 1). The shell 1 is a soluble shell 1. The shuttle-shaped data acquisition device 400 also includes a return body 3, which is installed inside the soluble shell 1. The data storage module 31 is located inside the return body 3. The return body 3 can be released from the soluble shell 1 into the fluid medium after the soluble shell 1 is dissolved and carries the data storage module 31 back with the fluid medium.

[0164] The conventional shell 1 can be made of various common materials such as steel, resin, plastic, and rubber. However, in this embodiment, the soluble shell 1 is made of soluble aluminum or soluble magnesium alloy. That is, the first shell 14 and the second shell 15 can be made wholly or partially of soluble metal. Alternatively, other materials soluble in the fluid medium can be used to make the soluble shell 1, depending on the characteristics of the fluid medium. The soluble shell 1 is not limited to completely dissolving after a preset time to release the return body 3; it can also partially dissolve after a preset time to form a release port, allowing the return body 3 to be released from this port. A screen can be installed at the release port to capture and collect the returned return body 3. In this embodiment, the preset time is four to ten hours.

[0165] Specifically, the density of the material in return body 3 is less than 1 g / cm³. 3 In this embodiment, the density of the return body 3 is 0.5 g / cm³. 3 ~0.9g / cm 3 The return body 3 can be made of lightweight materials such as plastic alloy, polyester fiber, or resin to meet the required density; or it can be a hollow shell filled with lightweight material to meet the required density. In addition, to ensure that the return body 3 can carry the data storage module 31 back to the delivery port, the volume of the return body 3 should be minimized as much as possible.

[0166] Preferably, the shuttle-shaped data acquisition device 400 further includes a conductive elastic structure 5, which is placed in a compressed state between the return body 3 and the data acquisition module 2, and the return body 3 and the conductive elastic structure 5 are in contact. The data storage module 31 is electrically connected to the data acquisition module 2 through the conductive elastic structure 5.

[0167] Specifically, one side of the return body 3 abuts against the data acquisition module 2, and the other side of the return body 3 abuts against the soluble shell 1. This limits the return body 3 within the receiving cavity 16 and electrically connects the data storage module 31 to the data acquisition module 2. After the soluble shell 1 is dissolved, the return body 3 can separate from the data acquisition module 2 and be released from the receiving cavity 16. However, to ensure successful release of the return body 3, the shuttle-shaped data acquisition device 400 also includes a conductive elastic structure 5. The conductive elastic structure 5 is compressed and placed between the return body 3 and the data acquisition module 2, with the return body 3 abutting against the conductive elastic structure 5. The data storage module 31 is electrically connected to the data acquisition module 2 through the conductive elastic structure 5. When the soluble shell 1 is dissolved, causing one side of the return body 3 to lose its limiting force, the return body 3 will be released from the receiving cavity 16 under the elastic restoring force of the conductive elastic structure 5.

[0168] Implementation Method 3:

[0169] The present invention also provides a capsule-shaped data acquisition device 500, such as... Figure 6 and Figure 7 As shown, it includes a housing 1, a data acquisition module 2, a data storage module 31, a wireless transmission module 24, and a power supply module 4. The housing 1 has a first end 11 and a second end 12 located at both ends of its central axis. The housing 1 also has a middle section 501 connecting the first end 11 and the second end 12. The outer surfaces of the first end 11 and the second end 12 are spherical surfaces of the same diameter. The outer surface of the middle section 501 is a cylindrical side surface 502 connecting the two spherical surfaces, so that the housing 1 is capsule-shaped. The housing 1 can fall into the ball seat 201 of the downhole packer 200 with either the first end 11 or the second end 12 facing forward and seal the ball seat 201. The data acquisition module 2 is installed inside the housing 1. The first end 11 and the second end 12 of the housing 1 are both provided with detection channels 17. The data acquisition module 2 has a data acquisition and processing chip 21 and a first sensor 22 located in the detection channel 17. The data acquisition and processing chip 21 is electrically connected to the first sensor 22. The first sensor 22 is used to detect the fluid parameters on both sides of the downhole packer 200. The data storage module 31 is integrated into the data acquisition and processing chip 21.

[0170] The capsule-shaped data acquisition device 500 of this invention has a capsule-shaped housing 1 with distinct ends. This prevents the housing 1 from flipping repeatedly in the wellbore during the lowering process and failing to settle properly for sealing. Simultaneously, the housing 1 integrates data acquisition functionality, meaning the capsule-shaped data acquisition device 500 possesses integrated sealing and acquisition capabilities as well as anti-flipping functionality. Furthermore, due to its shape, the housing 1 will fall into the ball seat 201 of the downhole packer 200 with either the first end 11 or the second end 12 facing forward to seal the ball seat 201. Therefore, the detection channels 17 at both ends can simultaneously acquire data such as pressure, temperature, or flow rate on both sides of the downhole packer 200, thereby determining downhole parameters such as pressure, temperature, or flow rate of the current fracturing section and adjacent fracturing sections during fracturing operations.

[0171] Specifically, such as Figure 6 As shown, the capsule-shaped data acquisition device 500 has a housing 1, which includes a first housing 14 and a second housing 15. The first housing 14 has a first groove 161, and the second housing 15 has a second groove 162. The first housing 14 and the second housing 15 are mated together, and the first groove 161 and the second groove 162 are fitted together to form a receiving cavity 16. The receiving cavity 16 is used to accommodate the data acquisition module 2, the data storage module 31, the wireless transmission module 24, and the power supply module 4. The end of the first housing 14 away from the second housing 15 forms a first end 11, and the end of the second housing 15 away from the first housing 14 forms a second end 12. A middle section 501 is formed between the first end 11 and the second end 12.

[0172] The outer surface of the first end 11 is a first spherical surface 111, the outer surface of the second end 12 is a second spherical surface 121, and the outer surface of the middle section 501 is a cylindrical side surface 502. The diameter of the first spherical surface 111 is equal to the diameter of the second spherical surface 121, and the diameter of the cylindrical side surface 502 is equal to the diameter of the first spherical surface 111. The two ends of the cylindrical side surface 502 are smoothly connected to the first spherical surface 111 and the second spherical surface 121, respectively, so that the shell 1 is capsule-shaped.

[0173] Furthermore, the detection channels 17 on the first end 11 and the second end 12 include at least one first detection channel 171 and at least one second detection channel 172. The first detection channel 171 is formed within the first housing 14, and the second detection channel 172 is formed within the second housing 15. One end of the first detection channel 171 extends to the outer surface of the first end 11, and the other end of the first detection channel 171 communicates with the receiving cavity 16 within the housing 1. One end of the second detection channel 172 extends to the outer surface of the second end 12, and the other end of the second detection channel 172 communicates with the receiving cavity 16 within the housing 1. The first detection channel 171 is located at the center of the first spherical surface 111, and the second detection channel 172 is located at the center of the second spherical surface 121.

[0174] The data acquisition module 2 is housed inside the housing 1, and the data acquisition module 2 has a data acquisition and processing chip 21 installed and fixed in the receiving cavity 16 and a first sensor 22 installed in the detection channel 17. The first sensor 22 is installed in both the first detection channel 171 and the second detection channel 172, and both first sensors 22 are connected to the data acquisition and processing chip 21 through wires 23. The first sensor 22 in the first detection channel 171 and the first sensor 22 in the second detection channel 172 can respectively contact the fluid medium on both sides of the downhole packer 200, thereby measuring the fluid parameters on both sides of the downhole packer 200.

[0175] The data storage module 31 is integrated on the data acquisition and processing chip 21. The data storage module 31 is electrically connected to the data acquisition and processing chip 21. The fluid parameters collected by the first sensor 22 in the data acquisition module 2 can be transmitted to the data storage module 31 for storage. The data after analysis and processing by the data acquisition and processing chip 21 in the data acquisition module 2 can also be transmitted to the data storage module 31 for storage.

[0176] In an optional embodiment, the capsule-shaped data acquisition device 500 can achieve downhole data transmission and retrieval via radio, and it also includes a wireless transmission module 24 and a power supply module 4. Figure 6 As shown, the wireless transmission module 24 is integrated on the data acquisition and processing chip 21. The wireless transmission module 24 is electrically connected to the data storage module 31 to transmit the data stored in the data storage module 31 wirelessly. The power supply module 4 can be installed and fixed in the receiving cavity 16, and is electrically connected to the data storage module 31 and the wireless transmission module 24 via the wire 23 to supply power to both. The power supply module 4 can be integrated into the data acquisition and processing chip 21 to supply power to the data acquisition and processing chip 21, and to supply power to the data storage module 31, the first sensor 22, and the wireless transmission module 24 through the data acquisition and processing chip 21.

[0177] In another alternative embodiment, the capsule-shaped data acquisition device 500 can also achieve downhole data recovery through a melting and return method (not shown in the figure, the melting and return method is basically the same as the structure in Embodiment 1). The shell 1 is a soluble shell 1. The capsule-shaped data acquisition device 500 also includes a return body 3, which is installed inside the soluble shell 1. The data storage module 31 is located inside the return body 3. After the soluble shell 1 is dissolved, the return body 3 can be released from the soluble shell 1 into the fluid medium and carry the data storage module 31 back with the fluid medium.

[0178] The conventional shell 1 can be made of various common materials such as steel, resin, plastic, and rubber. However, in this embodiment, the soluble shell 1 is made of soluble aluminum or soluble magnesium alloy. That is, the first shell 14 and the second shell 15 can be made wholly or partially of soluble metal. Alternatively, other materials soluble in the fluid medium can be used to make the soluble shell 1, depending on the characteristics of the fluid medium. The soluble shell 1 is not limited to completely dissolving after a preset time to release the return body 3; it can also partially dissolve after a preset time to form a release port, allowing the return body 3 to be released from this port. A screen can be installed at the release port to capture and collect the returned return body 3. In this embodiment, the preset time is four to ten hours.

[0179] Specifically, the density of the material in return body 3 is less than 1 g / cm³. 3 In this embodiment, the density of the return body 3 is 0.5 g / cm³. 3 ~0.9g / cm 3 The return body 3 can be made of lightweight materials such as plastic alloy, polyester fiber, or resin to meet the required density; or it can be a hollow shell filled with lightweight material to meet the required density. In addition, to ensure that the return body 3 can carry the data storage module 31 back to the delivery port, the volume of the return body 3 should be minimized as much as possible.

[0180] Preferably, the capsule-shaped data acquisition device 500 further includes a conductive elastic structure 5, which is placed in a compressed state between the return body 3 and the data acquisition module 2, and the return body 3 and the conductive elastic structure 5 are in contact. The data storage module 31 is electrically connected to the data acquisition module 2 through the conductive elastic structure 5.

[0181] Specifically, one side of the return body 3 abuts against the data acquisition module 2, and the other side of the return body 3 abuts against the soluble shell 1. This limits the return body 3 within the receiving cavity 16 and electrically connects the data storage module 31 to the data acquisition module 2. This allows the return body 3 to separate from the data acquisition module 2 and be released from the receiving cavity 16 after the soluble shell 1 is dissolved. However, to ensure successful release of the return body 3, the capsule-shaped data acquisition device 500 also includes a conductive elastic structure 5. The conductive elastic structure 5 is compressed and placed between the return body 3 and the data acquisition module 2, with the return body 3 abutting against the conductive elastic structure 5. The data storage module 31 is electrically connected to the data acquisition module 2 through the conductive elastic structure 5. When the soluble shell 1 is dissolved, causing one side of the return body 3 to lose its limiting force, the return body 3 will be released from the receiving cavity 16 under the elastic restoring force of the conductive elastic structure 5.

[0182] Implementation Method Four:

[0183] The present invention also provides a downhole data acquisition method, which is implemented using the data acquisition device described in embodiments one to three. The downhole data acquisition method includes the following steps: dropping a housing 1 from the wellhead downhole, the housing 1 falling into the ball seat 201 of the downhole packer 200 with the first end 11 or the second end 12 facing forward and sealing the ball seat 201; the data acquisition module 2 inside the housing 1 acquiring fluid parameters on both sides of the downhole packer 200 through the first sensor 22 in the detection channel 17; and the data acquisition module 2 transmitting the fluid parameters to the data storage module 31 for storage.

[0184] In this embodiment, the data acquisition device 100 has the same specific structure, working principle and beneficial effects as the data acquisition device 100 in Embodiment 1, and will not be described again here.

[0185] Furthermore, the data acquisition module 2 also includes a second sensor, and the downhole data acquisition method further includes the following steps: the data acquisition module 2 inside the housing 1 simultaneously measures the motion parameters of the housing 1 through the second sensor, and the data acquisition module 2 transmits the motion parameters to the data storage module 31 for storage.

[0186] Furthermore, the data acquisition module 2 also includes a data acquisition and processing chip 21, which is electrically connected to the first sensor 22, the second sensor, and the data storage module 31. The fluid parameters include the pressure, temperature, salinity, and / or pH value of the downhole fluid, and the motion parameters include the displacement, velocity, acceleration, momentum, and / or deflection angle of the casing 1. The data transmitted to the data storage module 31 includes the fluid parameters, motion parameters, and the analysis parameters, analysis curves, and / or analysis images generated by the data acquisition and processing chip 21 based on the above parameters.

[0187] In other embodiments of the present invention, such as Figure 6 and Figure 7 As shown, the data acquisition device 100 also includes a wireless transmission module 24, which is electrically connected to the data storage module 31. The downhole data acquisition method also includes the following steps: the wireless transmission module 24 transmits the data stored in the data storage module 31 via radio, and the reading device (reading sub 600) set at the wellhead or downhole can receive the radio signal.

[0188] Specifically, for long-distance downhole data acquisition, after the data storage module 31 completes the acquisition, the wireless transmission module 24 transmits the acquired data to the wellhead wirelessly. At the wellhead, a surface reading device reads and analyzes the wirelessly transmitted data. For medium- and short-distance downhole data acquisition, such as... Figure 7As shown, the data acquisition module 2 transmits downhole data to the data storage module 31. After the data storage module 31 completes the acquisition, the wireless transmission module 24 transmits the acquired data. At this time, the reading sub 600 is lowered from the ground 700 and lowered from the wellhead via the cable 601 and supplied with power. When the reading sub 600 approaches the acquisition device, it automatically acquires the data transmitted by the wireless transmission module 24, reads the data and interprets it at the ground 700. After the interpretation is completed, the reading sub 600 is raised to the wellhead.

[0189] In other embodiments of the present invention, such as Figure 1 and Figure 2 As shown, the shell 1 is a soluble shell 1. The data acquisition device 100 also includes a return body 3, which is installed inside the soluble shell 1. The data storage module 31 is located inside the return body 3. The downhole data acquisition method also includes the following steps: after the shell 1 is lowered into the well for a preset time, the soluble shell 1 is dissolved by the downhole fluid. The return body 3 is released from the soluble shell 1 and carries the data storage module 31 back to the wellhead with the downhole fluid.

[0190] In other embodiments of the present invention, multiple soluble shells 1 can be sequentially deployed to multiple well sections or formations, and data from different well sections or formations can be collected by data acquisition modules 2 within the multiple soluble shells 1; or, a downhole packer 200 can be placed below the well section or formation to be fractured, and the ball seat 201 of the downhole packer 200 can be sealed by deploying soluble shells 1, followed by fracturing operations in the well section or formation to be fractured, and data can be collected during the fracturing operation by data acquisition modules 2 within the soluble shells 1. By analyzing the downhole data of two adjacent fractured well sections or formations to be fractured, the packing effectiveness of the downhole packer 200 can be determined.

[0191] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A data acquisition device, characterized in that, include: The housing (1) has a first end (11) and a second end (12) located at both ends of its central axis. The outer surfaces of the first end (11) and the second end (12) are spherical surfaces with different diameters. The housing (1) can fall into the ball seat (201) of the downhole packing tool (200) with either the first end (11) or the second end (12) facing forward and seal the ball seat (201). The data acquisition module (2) is installed inside the housing (1). The first end (11) and the second end (12) of the housing (1) are both provided with detection channels (17). The data acquisition module (2) has a first sensor (22) located in the detection channel (17). The first sensor (22) is used to detect the fluid parameters on both sides of the downhole packing tool (200). Data storage module (31), which is electrically connected to the data acquisition module (2); Between the first end (11) and the second end (12), the outer surface of the shell (1) is a smooth transition surface (13) that can smoothly connect the two spherical surfaces.

2. The data acquisition device according to claim 1, characterized in that, Of the two spherical surfaces at the first end (11) and the second end (12), one of the spherical surfaces has an arc range of 5π / 4 to 7π / 5 and a diameter range of 55mm to 90mm; the other spherical surface has an arc range of 4π / 5 to π and a diameter range of 35mm to 65mm.

3. The data acquisition device according to claim 2, characterized in that, The centers of the two spherical surfaces at the first end (11) and the second end (12) are both located on the central axis of the housing (1), and the detection channels (17) provided at the first end (11) and the second end (12) are respectively located at the center of the corresponding spherical surfaces.

4. The data acquisition device according to claim 3, characterized in that, The smooth transition surface (13) is formed by rotating a smooth curve around the central axis of the shell (1). The two ends of the smooth curve are connected to the two spherical surfaces along the tangent direction of the ends of the two spherical surfaces respectively. The middle part of the smooth curve is a transition arc 131 that is concave towards the central axis of the shell 1. The diameter of the transition arc 131 is in the range of 250mm to 470mm, and the arc range is π / 18 to π / 15.

5. The data acquisition device according to claim 1, characterized in that, The data acquisition module (2) includes a data acquisition and processing chip (21) and the first sensor (22). The data acquisition and processing chip (21) is electrically connected to the first sensor (22) and the data storage module (31).

6. The data acquisition device according to claim 5, characterized in that, The detection channel (17) includes at least one first detection channel (171) and at least one second detection channel (172). One end of the first detection channel (171) extends to the outer surface of the first end (11), and one end of the second detection channel (172) extends to the outer surface of the second end (12), so that the first sensor (22) in the first detection channel (171) and the first sensor (22) in the second detection channel (172) can respectively contact the fluid medium on both sides of the downhole packing tool (200).

7. The data acquisition device according to claim 6, characterized in that, The housing (1) includes a first housing (14) and a second housing (15). The first housing (14) has a first groove (161), and the second housing (15) has a second groove (162). The first housing (14) and the second housing (15) are mated together, and the first groove (161) and the second groove (162) are fitted together to form a receiving cavity (16). The data acquisition and processing chip (21) and the data storage module (31) are both placed in the receiving cavity (16). The end of the first housing (14) away from the second housing (15) forms the first end (11), and the end of the second housing (15) away from the first housing (14) forms the second end (12).

8. The data acquisition device according to claim 5, characterized in that, The data acquisition module (2) also includes a second sensor for measuring the motion parameters of the housing (1), and the second sensor is electrically connected to the data acquisition and processing chip (21).

9. The data acquisition device according to claim 5, characterized in that, The data acquisition device (100) also includes a power supply module (4), which is integrated on the data acquisition and processing chip (21).

10. The data acquisition device according to claim 5, characterized in that, The data acquisition device (100) further includes a wireless transmission module (24), which is integrated on the data acquisition and processing chip (21). The wireless transmission module (24) is electrically connected to the data storage module (31) to transmit the data stored in the data storage module (31) via radio.

11. The data acquisition device according to claim 1, characterized in that, The housing (1) is a soluble housing (1). The data acquisition device (100) also includes a return body (3). The return body (3) is installed inside the soluble housing (1). The data storage module (31) is located inside the return body (3). The return body (3) can be released from the soluble housing (1) into the fluid medium after the soluble housing (1) dissolves and carries the data storage module (31) back with the fluid medium.

12. The data acquisition device according to claim 11, characterized in that, The data acquisition device (100) has a first usage state and a second usage state; In the first usage state, the soluble shell (1) can be placed from the dispensing port to a preset detection position in the detection environment and can be dissolved by the fluid medium of the detection environment after a preset time, so that the return body (3) can be released from the soluble shell (1) into the fluid medium and carry the data storage module (31) back to the dispensing port with the fluid medium; In the second usage state, the soluble shell (1) can be placed into the detection environment from the dispensing port and reach the preset collection position before being dissolved by the fluid medium of the detection environment and releasing the return body (3).

13. The data acquisition device according to claim 11 or 12, characterized in that, The data acquisition device (100) further includes a conductive elastic structure (5), which is placed in a compressed state between the return body (3) and the data acquisition module (2), and the return body (3) is in contact with the conductive elastic structure (5). The data storage module (31) is electrically connected to the data acquisition module (2) through the conductive elastic structure (5).

14. The data acquisition device according to claim 13, characterized in that, The data acquisition device (100) further includes a reinforcing elastic structure (6), which is placed in a compressed state between the return body (3) and the soluble shell (1), and the return body (3) is in contact with the reinforcing elastic structure (6).

15. The data acquisition device according to claim 14, characterized in that, The conductive elastic structure (5) includes a plurality of spring pins (51) arranged at intervals, and the reinforcing elastic structure (6) includes a spring (61).

16. The data acquisition device according to claim 11 or 12, characterized in that, The return body (3) returns with the fluid medium by utilizing the discharge pressure of the fluid medium and / or the buoyancy of the fluid medium.

17. The data acquisition device according to claim 11, characterized in that, The density of the material of the return body (3) is less than 1 g / cm³. 3 .

18. The data acquisition device according to claim 11, characterized in that, The material of the soluble shell (1) is soluble aluminum or soluble magnesium alloy.

19. A data acquisition device, characterized in that, include: The housing (1) has a first end (11) and a second end (12) located at both ends of its central axis. The housing (1) also has a middle section (401) located between the first end (11) and the second end (12). The outer surfaces of the first end (11) and the second end (12) are spherical surfaces with the same diameter. The outer surface of the middle section (401) is a spherical surface with a diameter greater than that of the spherical surface at the end. The housing (1) can fall into the ball seat (201) of the downhole packing tool (200) with the first end (11) or the second end (12) facing forward and seal the ball seat (201). The data acquisition module (2) is installed inside the housing (1). The first end (11) and the second end (12) of the housing (1) are both provided with detection channels (17). The data acquisition module (2) has a data acquisition and processing chip (21) and a first sensor (22) provided in the detection channel (17). The data acquisition and processing chip (21) is electrically connected to the first sensor (22). The first sensor (22) is used to detect the fluid parameters on both sides of the downhole packing tool (200). Data storage module (31), which is integrated into the data acquisition and processing chip (21); Among them, between the first end (11) and the middle section (401), and between the middle section (401) and the second end (12), the outer surface of the shell (1) is a smooth transition surface (13) that can smoothly connect two adjacent spherical surfaces.

20. The data acquisition device according to claim 19, characterized in that, The data acquisition device also includes: A wireless transmission module (24) is integrated on the data acquisition and processing chip (21) to transmit the data stored in the data storage module (31) via radio. The power supply module (4) is electrically connected to the data acquisition and processing chip (21).

21. The data acquisition device according to claim 19, characterized in that, The housing (1) is a soluble housing (1). The data acquisition device also includes a return body (3). The return body (3) is installed inside the soluble housing (1). The data storage module (31) is located inside the return body (3). The return body (3) can be released from the soluble housing (1) into the fluid medium after the soluble housing (1) dissolves and carries the data storage module (31) back with the fluid medium.

22. The data acquisition device according to claim 21, characterized in that, The data acquisition device further includes a conductive elastic structure (5), which is placed in a compressed state between the return body (3) and the data acquisition module (2), and the return body (3) is in contact with the conductive elastic structure (5). The data storage module (31) is electrically connected to the data acquisition module (2) through the conductive elastic structure (5).

23. The data acquisition device according to claim 22, characterized in that, The data acquisition device further includes a reinforcing elastic structure (6), which is placed in a compressed state between the return body (3) and the soluble shell (1), and the return body (3) is in contact with the reinforcing elastic structure (6).

24. A data acquisition device, characterized in that, include: The housing (1) has a first end (11) and a second end (12) located at both ends of its central axis. The housing (1) also has a middle section (501) connecting the first end (11) and the second end (12). The outer surfaces of the first end (11) and the second end (12) are spherical surfaces with the same diameter. The outer surface of the middle section (501) is a cylindrical side surface (502) connecting the two spherical surfaces. The housing (1) can fall into the ball seat (201) of the downhole packer (200) with either the first end (11) or the second end (12) facing forward and seal the ball seat (201). The data acquisition module (2) is installed inside the housing (1). The first end (11) and the second end (12) of the housing (1) are both provided with detection channels (17). The data acquisition module (2) has a data acquisition and processing chip (21) and a first sensor (22) provided in the detection channel (17). The data acquisition and processing chip (21) is electrically connected to the first sensor (22). The first sensor (22) is used to detect the fluid parameters on both sides of the downhole packing tool (200). Data storage module (31), which is integrated into the data acquisition and processing chip (21).

25. The data acquisition device according to claim 24, characterized in that, The data acquisition device also includes: A wireless transmission module (24) is integrated on the data acquisition and processing chip (21) to transmit the data stored in the data storage module (31) via radio. The power supply module (4) is electrically connected to the data acquisition and processing chip (21).

26. The data acquisition device according to claim 24, characterized in that, The housing (1) is a soluble housing (1). The data acquisition device also includes a return body (3). The return body (3) is installed inside the soluble housing (1). The data storage module (31) is located inside the return body (3). The return body (3) can be released from the soluble housing (1) into the fluid medium after the soluble housing (1) dissolves and carries the data storage module (31) back with the fluid medium.

27. The data acquisition device according to claim 26, characterized in that, The data acquisition device further includes a conductive elastic structure (5), which is placed in a compressed state between the return body (3) and the data acquisition module (2), and the return body (3) is in contact with the conductive elastic structure (5). The data storage module (31) is electrically connected to the data acquisition module (2) through the conductive elastic structure (5).

28. The data acquisition device according to claim 27, characterized in that, The data acquisition device further includes a reinforcing elastic structure (6), which is placed in a compressed state between the return body (3) and the soluble shell (1), and the return body (3) is in contact with the reinforcing elastic structure (6).

29. A downhole data acquisition method, characterized in that, The downhole data acquisition method, implemented using the data acquisition device as described in any one of claims 1, 19, and 24, includes the following steps: The casing (1) is dropped from the wellhead downhole, and the casing (1) can fall into the ball seat (201) of the downhole packer (200) with the first end (11) or the second end (12) facing forward and seal the ball seat (201); The data acquisition module (2) inside the housing (1) acquires fluid parameters on both sides of the downhole packing tool (200) through the first sensor (22) in the detection channel (17); The data acquisition module (2) transmits the fluid parameters to the data storage module (31).

30. The downhole data acquisition method according to claim 29, characterized in that, The data acquisition module (2) further includes a second sensor, and the downhole data acquisition method further includes the following steps: The data acquisition module (2) inside the housing (1) simultaneously measures the motion parameters of the housing (1) through the second sensor.

31. The downhole data acquisition method according to claim 30, characterized in that, The data acquisition module (2) further includes a data acquisition and processing chip (21), which is electrically connected to the first sensor (22), the second sensor and the data storage module (31) respectively. The fluid parameters include the pressure, temperature, salinity and / or pH of the downhole fluid, and the motion parameters include the displacement, velocity, acceleration, momentum and / or deflection angle of the casing (1). The data transmitted to the data storage module (31) includes the fluid parameters, the motion parameters, and the analysis parameters, analysis curves, and / or analysis images generated by the data acquisition and processing chip (21) based on the above parameters.

32. The downhole data acquisition method according to any one of claims 29-31, characterized in that, The data acquisition device (100) further includes a wireless transmission module (24), which is electrically connected to the data storage module (31). The downhole data acquisition method further includes the following steps: The wireless transmission module (24) transmits the data stored in the data storage module (31) via radio, and the reading device set at the wellhead or lowered into the well receives the radio signal.

33. The downhole data acquisition method according to any one of claims 29-31, characterized in that, The housing (1) is a soluble housing (1), the data acquisition device (100) further includes a return body (3) installed inside the soluble housing (1), the data storage module (31) is located inside the return body (3), and the downhole data acquisition method further includes the following steps: After the shell (1) is lowered into the well for a preset time, the soluble shell (1) is dissolved by the downhole fluid, and the return body (3) is released from the soluble shell (1) and carries the data storage module (31) back to the wellhead with the downhole fluid.

34. The downhole data acquisition method according to claim 33, characterized in that, Multiple soluble shells (1) are sequentially deployed to multiple well sections or formations, and data from different well sections or formations are collected by the data acquisition modules (2) within the multiple soluble shells (1); or The downhole packer (200) is placed below the section of the well to be fractured or the layer to be fractured. Then, the ball seat (201) of the downhole packer (200) is sealed by deploying the soluble shell (1). Then, fracturing is carried out in the section of the well to be fractured or the layer to be fractured. Data is collected during the fracturing process by the data acquisition module (2) inside the soluble shell (1).

Images