Data acquisition apparatus and downhole data acquisition method

Abstract

A data acquisition apparatus and a downhole data acquisition method. The data acquisition apparatus comprises: a housing having a first end and a second end located at either end of a central axis thereof, an outer surface of the first end and an outer surface of the second end being spherical surfaces having different diameters, and the housing being capable, with either the first end or the second end facing forward, of seating in a ball seat of a downhole packing tool and plugging the ball seat; a data acquisition module mounted within the housing, the first end and the second end of the housing both being provided with a measuring channel, the data acquisition module being provided with a first sensor arranged within each measuring channel, and the first sensor being configured for measuring a fluid parameter on two sides of the downhole packing tool; and a data storage module electrically connected to the data acquisition module. The present application addresses the problem where existing spherical downhole collectors are unable to effectively acquire fluid data at both ends of a downhole packing tool and evaluate packing sealing effectiveness after packer setting due to continuous changes in data acquisition locations of downhole data acquisition devices during run-in-hole.

Description

Data acquisition device and downhole data acquisition method

[0001] Related applications

[0002] This application claims priority to Chinese Patent Application No. 202411391162.2, filed on September 30, 2024, and Chinese Patent Application No. 202510632767.4, filed on May 16, 2025, and incorporates by reference the entire disclosure of all of the above patent applications as part of this application. TECHNICAL FIELD

[0003] The present application relates to the technical field of data acquisition of pipelines, pipe networks and downhole environments, and in particular to a data acquisition device and a downhole data acquisition method. BACKGROUND

[0004] The acquisition of downhole pressure, temperature and other data is an important basis for realizing rapid interpretation and evaluation of formations, analysis and judgment of reservoir reconstruction effects, identification and analysis of wellbore operations, and interpretation and evaluation of production conditions, and provides reliable data for developing subsequent construction plans and determining reasonable construction parameters. Therefore, the research on downhole testing data acquisition technology has become an inevitable direction for the development of digital oilfields.

[0005] Currently, the acquisition technology of downhole data during drilling and completion and production mainly includes downhole permanent pressure monitoring technology, cable reading technology, downhole electronic pressure gauge fishing reading technology, and downhole permanent optical fiber monitoring technology. However, the above technologies need to be combined with oil casing, wire, cable, optical fiber, etc., and need to increase the running tool, which has the disadvantages of complex construction process, high cost and low economic benefit, especially in the application of downhole data acquisition in deep wells and long horizontal section wells, the disadvantages are particularly obvious. Therefore, it is usually only used in the exploration stage and key areas, and cannot be widely applied.

[0006] The current downhole data acquisition device usually adopts a spherical structure, which is usually used for data acquisition of pipelines, pipe networks and downhole environments, but cannot meet the application of reservoir reconstruction in oil and gas field development. The internal space is provided with multiple modules such as acquisition, storage and processing. For example, Chinese patent application CN108180014A discloses a downhole information monitoring device and a method for monitoring downhole information, US patent application US20160320769A1 discloses a cordless device for measuring characteristics of a downhole wellbore, US patent application US20190242808A1 discloses a corrosion sensor and a ball, and Japanese patent application JP2023092039A discloses a physical quantity measuring device. The above patents all adopt a spherical design. When the sphere is used in the downhole casing environment, since the maximum 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 at one end, and the sealing effect of the sealing tool cannot be effectively judged. In other downhole environments, multiple sensors can be arranged in a large-diameter sphere, but the sphere constantly turns over in the downhole fluid environment, and the collection position of each sensor constantly changes. When the sphere reaches the landing position, the turning state of the sphere is random, and the collection position is also random. The collection sensor lands on the contact surface of the ball seat body, causing the collection port to be blocked by the contact surface and unable to normally collect data. After landing, the sphere still turns over, and the collection data of the two ends of the sealing tool cannot be effectively judged to determine the separation effect.

[0007] In addition, in the flowback mode, the above patents use a flowback mode to flow back the soluble sphere or electronic component module to the wellhead for data reading. However, if the downhole flow rate is low, the whole acquisition device will be difficult to flow back or even unable to flow back, with low reliability and poor implementability. Or the electronic component module is difficult to separate from the flowback body, and cannot be effectively released. SUMMARY

[0008] The purpose of the present application is to provide a data acquisition device and a downhole data acquisition method to solve the technical problems of complex tools and construction processes for obtaining downhole data, low efficiency and high cost.

[0009] The above technical purpose of the present application is mainly realized by the following technical scheme:

[0010] In a first aspect, the application provides a data acquisition device, which comprises a housing, a data acquisition module and a data storage module. The housing has a first end and a second end located at two ends of an axis thereof, and the outer surface of the first end and the outer surface of the second end are spherical surfaces with different diameters. The housing can be placed into a ball seat of a downhole packer with the first end or the second end facing forward and seal the ball seat. The data acquisition module is installed in the housing, and the first end and the second end of the housing are provided with detection channels. The data acquisition module has a first sensor arranged in the detection channel, and the first sensor is used to detect fluid parameters on both sides of the downhole packer. The data storage module is electrically connected to the data acquisition module. The outer surface of the housing between the first end and the second end is a smooth transition surface that connects the two spherical surfaces smoothly.

[0011] In a second aspect, the application also provides another data acquisition device, which comprises a housing, a data acquisition module and a data storage module. The housing has a first end and a second end located at two ends of an axis thereof, and the housing also has a middle section between the first end and the second end. The outer surface of the first end and the outer surface of 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 greater than that of the spherical surfaces of the ends. The housing can be placed into a ball seat of a downhole packer with the first end or the second end facing forward and seal the ball seat. The data acquisition module is installed in the housing, and the first end and the second end of the housing are provided with detection channels. The data acquisition module has a data acquisition processing chip and a first sensor arranged in the detection channel. The data acquisition processing chip is electrically connected to the first sensor, and the first sensor is used to detect fluid parameters on both sides of the downhole packer. The data storage module is integrated into the data acquisition processing chip. The outer surface of the housing between the first end and the middle section and between the middle section and the second end is a smooth transition surface that connects two adjacent spherical surfaces smoothly.

[0012] In a third aspect, the application further provides another data acquisition device, which comprises a housing, a data acquisition module and a data storage module. The housing has a first end and a second end located at both ends of an axis thereof, and has a middle section connecting the first end and the second end. The outer surface of the first end and the outer surface of the second end are spherical surfaces with 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 placed into the ball seat of a downhole packer with the first end or the second end facing forward and block the ball seat. The data acquisition module is installed in the housing. The first end and the second end of the housing are provided with detection channels. The data acquisition module has a data acquisition processing chip and a first sensor arranged in the detection channel. The data acquisition processing chip is electrically connected with the first sensor. The first sensor is used for detecting the fluid parameters on both sides of the downhole packer. The data storage module is integrated in the data acquisition processing chip.

[0013] In a fourth aspect, the application further provides a downhole data acquisition method, which is implemented by using the data acquisition device described above. The downhole data acquisition method comprises the following steps:

[0014] The housing is placed into the downhole from the wellhead. The housing can be placed into the ball seat of a downhole packer with the first end or the second end facing forward and block the ball seat.

[0015] The data acquisition module in the housing acquires the fluid parameters on both sides of the downhole packer through the first sensor in the detection channel.

[0016] The data acquisition module transmits the fluid parameters to the data storage module.

[0017] Compared with the prior art, the application has the following characteristics and advantages:

[0018] Firstly, the outer surface of the housing of the data acquisition device described in the application has a first end and a second end located at both ends of an axis thereof. A preferable housing structure is a gourd-shaped structure with one end larger and the other end smaller. The gourd-shaped structure can prevent the housing from continuously turning over in the wellbore during the placement process and failing to be seated for blocking, so that the data acquisition device of the application has the functions of blocking the flow passage of a downhole packer and acquiring data, i.e. has the functions of integrated blocking and acquisition and anti-overturning. At the same time, the housing in the application will be placed into the ball seat of a downhole packer with the first end or the second end facing forward to block the ball seat, so that the pressure, temperature or flow rate data on both sides of the downhole packer can be obtained through the detection channels arranged at both ends, and the downhole parameters such as the pressure, temperature or flow rate of the current fracturing section and the adjacent fractured section can be determined during the fracturing operation. Of course, the above technical purposes can also be achieved by using a shuttle-shaped housing and a gourd-shaped housing with obvious two ends.

[0019] Secondly, the data acquisition device has a gourd-shaped shell with two ends of different sizes, which can simultaneously satisfy the adaptation of downhole tools of different sizes (5.5in / 4.5in / 3.5in, etc.), and the small end is arranged to reduce the volume to save the material of the body, especially to reduce the residue of the soluble tool.

[0020] Thirdly, the data acquisition device and the downhole data acquisition method do not need to be sent by using oil pipes, casing pipes, cables, steel wires, etc., and can be directly put into the well for pumping without increasing additional construction processes.

[0021] Fourthly, the data acquisition device and the downhole data acquisition method provide two selectable data recovery methods, one of which can collect the downhole collected data in a wireless transmission mode, and the other of which can be recovered in a soluble shell and flowback body mode. The soluble shell mode can be dissolved by the downhole fluid in the downhole environment, restore the wellbore to be unobstructed, be conducive to subsequent operations, have the characteristics of high pressure resistance and high temperature resistance, and can be applied to ultra-deep wells and long horizontal section wells.

[0022] Fifthly, the data acquisition device 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, so as to realize the real-time detection of key data parameters such as pipeline blockage, water leakage, water level, flow rate, pressure, fluid medium, water quality, gas content, and medium detection. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. The drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without any creative labor. The drawings described herein are for illustrative purposes only, and are not intended to limit the scope of the present application in any way. In addition, the shapes and proportional sizes of the components in the drawings are only illustrative, and are used to help understand the present application, and are not specific limitations on the shapes and proportional sizes of the components of the present application. Those skilled in the art can select various possible shapes and proportional sizes to implement the present application according to specific circumstances under the guidance of the present application. In the drawings:

[0024] Fig. 1 is a schematic view of the main cross section of the data acquisition device in the embodiment of the present application;

[0025] Fig. 2 is a use state diagram of the data acquisition device applied to downhole data acquisition in the embodiment of the present application;

[0026] Fig. 3 is a perspective view of the appearance of the soluble shell according to an embodiment of the present application;

[0027] Fig. 4 is a structural schematic diagram of the conductive elastic structure and the reinforcing elastic structure according to an embodiment of the present application;

[0028] Fig. 5 is a schematic diagram of the front view of the cross section of the shuttle-shaped data acquisition device according to an embodiment of the present application;

[0029] Fig. 6 is a schematic diagram of the front view of the cross section of the capsule-shaped data acquisition device according to an embodiment of the present application;

[0030] Fig. 7 is a schematic diagram of the structure of the wireless data recovery of the shuttle-shaped data acquisition device according to an embodiment of the present application.

[0031] Legend: 100, data acquisition device; 1, shell / soluble shell; 11, first end; 111, first spherical surface; 12, second end; 121, second spherical surface; 13, round transition surface; 131, transition arc; 14, first shell; 15, second shell; 16, accommodating 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; 2, data acquisition module; 21, data acquisition processing chip; 22, first sensor; 23, wire; 24, wireless transmission module; 3, back-off body; 31, data storage module; 4, power supply module; 5, conductive elastic structure; 51, spring needle; 6, reinforcing elastic structure; 61, spring; 7, shell sealing structure; 8, snap spring; 200, downhole packer; 201, ball seat; 202, rubber sleeve; 203, flow passage; 204, ball seating surface; 300, casing; 400, shuttle-shaped data acquisition device; 401, middle section; 402, third spherical surface; 500, capsule-shaped data acquisition device; 501, middle section; 502, cylindrical side surface; 600, reading sub; 601, cable; 700, ground. DETAILED DESCRIPTION

[0032] In order to make the person skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the present application.

[0033] It is to be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. Where, when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or intervening elements can also be present. As used herein the terms "vertical", "horizontal", "left", "right" and similar terms are used for explanation only and are not intended to be limiting.

[0034] 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 application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0035] Embodiment one:

[0036] As shown in FIG. 1 and FIG. 2, the application provides a data acquisition device 100, which comprises 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 the axis, the outer surface of the first end 11 and the outer surface of the second end 12 are spherical surfaces with different diameters, the housing 1 can be placed into the ball seat 201 of the downhole packer 200 with the first end 11 or the second end 12 facing forward and block the ball seat 201; the data acquisition module 2 is installed in the housing 1, 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 arranged in the detection channel 17, 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 electrically connected with the data acquisition module 2.

[0037] The data acquisition device 100 described in the application has a clear two-end shape, which can prevent the housing 1 from continuously turning in the wellbore during the lowering process and failing to seat and seal, and the housing 1 is integrated with the data acquisition function, that is, the data acquisition device 100 has the functions of sealing and acquisition integration and anti-turning. At the same time, the housing 1 in the application will fall into the ball seat 201 of the downhole packer 200 with the first end 11 or the second end 12 facing forward to block the ball seat 201, so that the pressure, temperature or flow data on both sides of the downhole packer 200 can be obtained through the detection channels 17 arranged at both ends of the housing 1, and the downhole parameters such as pressure, temperature or flow of the current fracturing section and the adjacent fractured section can be determined in the fracturing operation.

[0038] As shown in FIG. 1, as described above, the data acquisition device 100 can replace the ball plug of the downhole packer tool 200 to plug the ball seat 201, that is, the shell 1 can fall into the ball seat 201 of the downhole packer tool 200 and plug the ball seat 201, so that the downhole data acquisition of the downhole area on both sides of the downhole packer tool 200 can be realized. Wherein, the downhole packer tool 200 further comprises a rubber sleeve 202 or a metal sealing ring sleeved 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 tool 200 is the same as the prior art, and will not be described here.

[0039] Of course, the data acquisition device 100 of the embodiment of the present application also has similar beneficial effects when applied to data acquisition in other detection environments such as oil and gas pipelines, underground pipelines, mine tunnels, etc. Therefore, the data acquisition device 100 of the embodiment of the present application can also realize the monitoring of urban underground pipe network and the real-time detection of key data parameters such as underground pipeline blockage, water leakage, pipe network water level, flow, pressure, water quality, etc.

[0040] Hereinafter, the specific structure of each part of the data acquisition device 100 of the embodiment of the present application and the positional and connecting relationship between the parts will be described.

[0041] The data acquisition device 100 of the embodiment of the present application has a shell 1, which comprises a first shell 14 and a second shell 15. The first shell 14 is provided with a first recess 161, and the second shell 15 is provided with a second recess 162. The first shell 14 and the second shell 15 are butted and matched, and the first recess 161 and the second recess 162 are matched to form a containing cavity 16. The containing cavity 16 is used to contain a data acquisition module 2 and a data storage module 31. The end of the first shell 14 away from the second shell 15 forms a first end 11, and the end of the second shell 15 away from the first shell 14 forms a second end 12. The first shell 14 and the second shell 15 comprise but are not limited to a male buckle and a female buckle matched with each other, and the male buckle and the female buckle are connected through a threaded connection structure 18. In order to ensure the airtightness of the containing cavity 16, a shell sealing structure 7 is arranged at the butting position of the first shell 14 and the second shell 15. The shell sealing structure 7 comprises a sealing gasket clamped between the first shell 14 and the second shell 15.

[0042] 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. The diameter of the first spherical surface 111 is greater than the diameter of the second spherical surface 121. Through the design of the spherical surfaces of different sizes, it is ensured that the shell 1 can fall into the ball seat 201 of the downhole packer tool 200 and plug the ball seat 201 in the way that the first end 11 or the second end 12 faces forward after continuous turning downhole.

[0043] The detection channels 17 on the first end 11 and the second end 12 of the shell 1 include at least one first detection channel 171 and at least one second detection channel 172, the first detection channel 171 is arranged in the first shell 14, and the second detection channel 172 is arranged in the second shell 15. One end of the first detection channel 171 penetrates to the outer surface of the first end 11, and the other end of the first detection channel 171 is in communication with the containing cavity 16 in the shell 1; one end of the second detection channel 172 penetrates to the outer surface of the second end 12, and the other end of the second detection channel 172 is in communication with the containing cavity 16 in the shell 1.

[0044] The shapes and sizes of the first recess 161 and the second recess 162 are not limited in particular, and can be rectangular, square, circular or other shapes, as long as the containing cavity 16 formed in cooperation can meet the containing requirements, that is, can contain the data acquisition module 2 and the data storage module 31. In the embodiment, the first recess 161 and the second recess 162 are both rectangular or circular recesses, and the diameter or the side length is in the range of 8mm-48mm, and the depth is 10mm-48mm; the second recess 162 is a rectangular or circular recess, and the diameter or the side length is in the range of 8mm-48mm, and the depth is 10mm-48mm.

[0045] The data acquisition device 100 of the embodiment also has a data acquisition module 2, as shown in FIG. 2, the data acquisition module 2 is arranged in the shell 1, and the data acquisition module 2 has a first sensor 22 arranged in the detection channel 17, the first detection channel 171 and the second detection channel 172 are both provided with the first sensor 22, and 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.

[0046] The downhole packer 200 is blocked by the shell 1, and the first detection channel 171 and the second detection channel 172 are arranged at the first end 11 and the second end 12 of the shell 1 respectively, and the first sensor 22 is installed in the two detection channels 17, so that the fluid parameters on both sides of the downhole packer 200 can be measured, and then by analyzing the fluid parameters on both sides, the sealing effectiveness of the downhole packer 200, the downhole construction working condition and the like can be judged, for example, the front of the downhole packer 200 is a fractured well section or a fractured layer position, and the rear of the downhole packer 200 is a to-be-fractured well section or a to-be-fractured layer position, if the pressures of the fluids on both sides of the downhole packer 200 are equal, it is judged that the downhole packer 200 is invalid.

[0047] The first sensor 22 is capable of measuring fluid parameters by contacting with the fluid medium, the fluid parameters including pressure, temperature, salinity and / or pH value of the downhole fluid, and optionally, the fluid parameters further including flow rate, fluid characteristics, composition, density, resistivity and / or gas content.

[0048] Further, as shown in FIG. 1 and FIG. 2, the data acquisition module 2 comprises the data acquisition processing chip 21 and a plurality of the first sensors 22, the data acquisition processing chip 21 is fixed in the accommodating cavity 16 of the shell 1, and the data acquisition processing chip 21 is electrically connected with the plurality of first sensors 22 through the wires 23. The downhole fluid parameters are measured by the first sensors 22, the fluid parameters are recorded by the data acquisition processing chip 21 and the analysis parameters, analysis curves and / or analysis images are generated according to the processing of the fluid parameters. Therefore, the downhole data collected by the data acquisition module 2 and transmitted to the data storage module 31 can only include the analysis parameters, analysis curves and / or analysis images generated by the data acquisition processing chip 21 according to the processing of the fluid parameters, and can also include the fluid parameters measured by the first sensors 22 themselves. The first sensors 22 can also be electrically connected with the data acquisition processing chip 21 in a wireless communication manner.

[0049] In some other embodiments of the present application, the data acquisition processing chip 21 can not be provided and only the first sensors 22 are provided, and the first sensors 22 are electrically connected with the data storage module 31, the fluid parameters measured by the first sensors 22 are directly transmitted to the data storage module 31 for storage, and the fluid parameters are analyzed and processed by the surface 700 analysis device after the data storage module 31 is recovered or the fluid data is transmitted to the wellhead.

[0050] Preferably, as shown in FIG. 2, the detection channel 17 comprises a mounting channel 173, the sensor is fixed in the mounting channel 173 by the snap spring 8, and to ensure the sealing of the containing cavity 16 and avoid the fluid medium flowing from the mounting channel 173 into the containing cavity 16, a channel sealing structure is arranged between the sensor and the mounting channel 173, the channel sealing structure comprises a plurality of sealing rings arranged along the axial direction of the mounting channel 173 and sleeved on the sensor. The detection channel 17 can also comprise one or more fluid channels 174, one end of the fluid channel 174 is in communication with the mounting channel 173, and the other end of the fluid channel 174 penetrates to the outer surface of the shell 1, so that the external fluid medium flows into the fluid channel 174 and contacts the first sensor 22 in the mounting channel 173. The mounting channel 173 of the detection channel 17 can be directly communicated with the containing cavity 16, such as the mounting channel 173 of the first detection channel 171 being directly communicated with the first groove 161, and the remaining space in the containing cavity 16 is used to arrange the lead 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 communicated with the containing cavity 16 through the wire passing channel 19, such as the mounting channel 173 of the second detection channel 172 being communicated with the second groove 162 through the wire passing channel 19, and the remaining space in the containing cavity 16 and the wire passing channel 19 are used to arrange the lead 23 between the first sensor 22 and the data acquisition and processing chip 21.

[0051] The data acquisition device 100 of the embodiment of the present application also has a data storage module 31, as shown in FIG. 2, the data storage module 31 is fixedly installed in the containing cavity 16 in the shell 1, the data storage module 31 is electrically connected with 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, and the 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. As to how to recycle the data stored in the downhole data storage module 31 to the wellhead for the operator to process, it will be described in detail below.

[0052] The structure of the preferred embodiment of the data acquisition device 100 of the embodiment of the present application and the technical effects will be further described below.

[0053] According to one embodiment of the present application, as shown in FIG. 2 and FIG. 3, between the first end 11 and the second end 12, the outer surface of the shell 1 is a smooth transition curved surface 13 capable of smoothly connecting two spherical surfaces, so that the shell 1 is in the shape of a gourd.

[0054] Specifically, the first spherical surface 111 has an arc range of 5π / 4 to 7π / 5, and the second spherical surface 121 has an arc range of 4π / 5 to π; the first spherical surface 111 and the second spherical surface 121 are connected through the smooth transition curved surface 13. In the embodiment of the present application, the diameter of the first spherical surface 111 is 55mm to 90mm, and the diameter of the second spherical surface 121 is 35mm to 65mm, as shown in FIG. 2 and FIG. 3. The center of the first spherical surface 111 and the center of the second spherical surface 121 are both located on the central axis of the shell 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 curved surface 13 is formed by rotating a smooth curve around the central axis of the shell 1, 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 second spherical surface 121 along the tangent direction of the end of the second spherical surface 121. The middle part of the smooth curve is generally a transition arc 131 which is recessed towards the central axis of the shell 1, the diameter of the transition arc 131 is 250mm to 470mm, and the arc range is π / 18 to π / 15. Of course, the smooth curve can also be a straight line with a transition part at both ends.

[0055] According to one embodiment of the present application, as shown in FIG. 1, the ball seat 201 of the downhole packer tool 200 is provided with a flow channel 203 for the flow of downhole fluid medium, the flow channel 203 has a ball seating surface 204 therein, the inner diameter of the ball seating surface 204 is gradually reduced in the insertion direction of the shell 1, the diameter of the first spherical surface 111 is less than or equal to the maximum inner diameter D1 of the ball seating surface 204 and greater than the minimum inner diameter D2 of the ball seating surface 204, and the diameter of the second spherical surface 121 is less than the minimum inner diameter D2 of the ball seating surface 204, so that when the soluble shell 1 falls into the ball seat 201 of the downhole packer tool 200 with the first end 11 facing forward, the first spherical surface 111 is clamped into the ball seating surface 204 to block the flow channel 203, and when the shell 1 falls into the ball seat 201 of the downhole packer tool 200 with the second end 12 facing forward, the second spherical surface 121 passes through the ball seating surface 204 to pass through the smooth transition curved surface 13 or the first spherical surface 111 clamped into the ball seating surface 204 to block the flow channel 203.

[0056] According to one embodiment of the present application, the data acquisition module 2 further comprises a second sensor for measuring the motion parameters of the shell 1, and the second sensor is electrically connected to the data acquisition and processing chip 21.

[0057] Specifically, the second sensor is arranged in the housing 1, for example, can be mounted and fixed in the accommodating cavity 16 (not shown in the figure) in the housing 1, and is used to measure the motion parameters of the housing 1; wherein the motion parameters include the parameters generated by the motion of the housing 1 in the dropping process, and can also include the parameters generated by the motion of the housing 1 after reaching the preset detection position (ball seat 201 of the downhole packer tool 200), and the motion parameters include the displacement, velocity, acceleration, momentum and / or deflection angle of the soluble housing 1. The mounting mode of the second sensor is not limited in particular, and can be mounted in contact with the fluid medium in the detection channel 17, or can be sealed in the housing 1. The data acquisition and processing chip 21 can also process the analysis parameters, analysis curves and / or analysis images generated according to the motion parameters detected by the second sensor; and at the same time, the motion parameters and analysis results are transmitted to the data storage module 31 for storage. The second sensor can be electrically connected with the data acquisition and processing chip 21 through wired or wireless communication.

[0058] According to one embodiment of the present application, as shown in FIG. 2, the data acquisition device 100 further comprises a power supply module 4, which is integrated on the data acquisition and processing chip 21.

[0059] Specifically, the power supply module 4 can be integrated on the data acquisition and processing chip 21, thereby supplying power for the data acquisition and processing chip 21, and supplying power for the data storage module 31, the first sensor 22 and the second sensor through the data acquisition and processing chip 21; wherein the power supply module 4 comprises one battery or a plurality of batteries, and the plurality of batteries are arranged in series or in parallel. Of course, the power supply module 4 can also be arranged at other positions of the accommodating cavity 16 or embedded in the wall of the housing 1; and the power supply module 4 can also be electrically connected with the data acquisition and processing chip 21, the data storage module 31, the first sensor 22 and the second sensor respectively.

[0060] According to one embodiment of the present application, the data acquisition device 100 further comprises a wireless transmission module 24, which is integrated on the data acquisition and processing chip 21, and is electrically connected with the data storage module 31 to emit the stored data in the data storage module 31 in the form of radio waves.

[0061] The data acquisition device 100 of the embodiment of the present application realizes downhole data transmission and recovery in the form of radio waves, without the need for operation tools such as oil pipes, cables and steel wires, and directly drops the housing 1 into the preset detection position of the detection environment, so as to collect the temperature, pressure and other data at the preset detection position through the internal data acquisition module 2 and store the data through the internal data storage module 31, and then transmits the data through the wireless transmission module 24.

[0062] Specifically, the wireless transmission module 24 can be integrated in the data acquisition and processing chip 21, and the wireless transmission module 24 is electrically connected with the data storage module 31. The data storage module 31 can transmit data to the wireless transmission module 24 and emit the data in a wireless manner. A reading device arranged at the wellhead or lowered into the well can receive the wireless signal, thereby realizing the recovery of the downhole data. Of course, the wireless transmission module 24 can also be arranged at other positions of the accommodating cavity 16 or embedded in the wall of the shell 1, or a corresponding wireless emission channel is separately formed in the shell 1, and the wireless transmission module 24 is arranged in the wireless emission channel, which is not limited here.

[0063] According to one embodiment of the present application, the shell 1 is a soluble shell 1, and the data acquisition device 100 further comprises a flowback body 3 installed in the soluble shell 1. The data storage module 31 is arranged in the flowback body 3. The flowback 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 after the soluble shell 1 is dissolved.

[0064] The data acquisition device 100 of the embodiment of the present application realizes the recovery of the downhole data through the melting and flowback mode. No operation tool such as tubing, cable or steel wire is needed. The soluble shell 1 is directly put into the preset detection position of the detection environment, so that the temperature, pressure and other data at the preset detection position are collected by the internal data acquisition module 2 and stored by the data storage module 31 of the internal flowback body 3. Then, the soluble shell 1 is dissolved by the fluid medium of the detection environment at a preset time, so that the internal flowback body 3 is released and carries the data storage module 31 back to the drop port with the fluid medium. Thus, the data can be read by collecting the flowback body 3 and taking out the data storage module 31, without the need of adding an extra process.

[0065] The flowback body 3 can return to the drop port with the fluid medium by using the blowout pressure of the fluid medium and / or using the buoyancy of the fluid medium. The liquid is pumped into the well by a hydraulic pump and pushes the soluble shell 1 to be lowered to the preset detection position in the well, and then the wellhead valve is closed. After a preset time, that is, after the data acquisition operation is completed, the wellhead valve is opened for blowout, so that the blowout pressure of the fluid medium in the well is generated. The density of the flowback body 3 is less than the density of the fluid medium, so that the flowback body 3 can float up after being released from the soluble shell 1.

[0066] Specifically, the material of the conventional shell 1 can be steel, resin, plastic, rubber and other common materials, while the material of the soluble shell 1 in the embodiment is soluble aluminum or soluble magnesium alloy, that is, the first shell 14 and the second shell 15 can be made of soluble metal entirely or partially, and of course other materials soluble in the fluid medium can be used to make the soluble shell 1 according to the characteristics of the fluid medium; the soluble shell 1 is not limited to being dissolved entirely to release the flowback body 3 after the preset time, but can be partially dissolved to form a release port for the flowback body 3 to be released from the release port after the preset time. The screen can be arranged at the drop port to capture and collect the returned flowback body 3. In the embodiment of the application, the preset time is four to ten hours.

[0067] Specifically, the material of the flowback body 3 has a density less than 1 g / cm 3 In the embodiment, the density of the flowback body 3 is 0.5 g / cm 3 ~0.9 g / cm 3 The flowback body 3 can be made of plastic alloy, polyester fiber or resin and other lightweight materials to meet the density requirement, or can be a hollow shell filled with lightweight material to meet the density requirement. In addition, to ensure that the flowback body 3 can carry the data storage module 31 back to the drop port and minimize the volume of the flowback body 3, the diameter or side length of the flowback body 3 is 10 mm to 45 mm in the embodiment of the application.

[0068] As shown in FIGS. 1 and 2, the data acquisition device 100 using the soluble shell 1 and the flowback body 3 can be applied to downhole data acquisition, especially for downhole data acquisition of deep wells and long horizontal section wells. The detection environment is the downhole environment, the drop port is the wellhead, and the preset detection position in the well can be any position in any well section or layer, or the downhole packer tool 200 can be arranged at the preset detection position to pack, and then the data acquisition device 100 (i.e., the soluble shell 1 with the flowback body 3 and the data acquisition module 2) can be dropped from the wellhead to the downhole packer tool 200, and the internal data acquisition module 2 can be used to acquire downhole data and transmit the data to the data storage module 31 for storage. Then, after the soluble shell 1 is dissolved, the flowback body 3 can carry the data storage module 31 back to the drop port, so that the data storage module 31 can be taken out by collecting the flowback body 3, and the ground reading device can be used to read the data. Therefore, without other operation tools and additional processes, the data acquisition device 100 can be lowered and the data storage module 31 can be recovered, so that the downhole data can be acquired, and then the intuitive data basis can be provided for fast interpretation and evaluation of the formation, analysis and judgment of the reservoir reconstruction effect, identification and analysis of the wellbore operation, and interpretation and evaluation of the production status.

[0069] According to one embodiment of the present application, as shown in FIG. 1 and FIG. 2, the data acquisition device 100 has a first use state and a second use state; in the first use state, the dissolvable shell 1 can be launched from the launch port to the preset detection position of the detection environment and can be dissolved by the fluid medium of the detection environment after a preset time, so that the return discharge body 3 can be released from the dissolvable shell 1 into the fluid medium and carry the data storage module 31 back to the launch port with the fluid medium; in the second use state, the dissolvable shell 1 can be launched from the launch port into the detection environment and reach the preset collection position before the return discharge body 3 is released by the dissolution of the fluid medium of the detection environment.

[0070] Specifically, the first use state is the return discharge release phase described above. When the detection environment is convenient to set the preset collection position, it can also not need to carry the data storage module 31 back to the launch port by releasing the return discharge body 3, at this time, the second use state can be used; 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 launch port, and the output port of the pipeline can be used as the collection port of the preset collection position, so that by controlling the dissolution of the dissolvable shell 1, it can be transported from the launch port to the collection port without being dissolved by the fluid medium to release the return discharge body 3.

[0071] According to one embodiment of the present application, as shown in FIG. 2, the data acquisition device 100 further comprises a conductive elastic structure 5, the conductive elastic structure 5 is in a compressed state between the return discharge body 3 and the data acquisition module 2, and the return discharge body 3 is in abutting contact with the conductive elastic structure 5, and the data storage module 31 is electrically connected with the data acquisition module 2 through the conductive elastic structure 5.

[0072] Specifically, one side of the return discharge body 3 is in abutting contact with the data acquisition module 2, and the other side of the return discharge body 3 is in abutting contact with the dissolvable shell 1, so as to realize the limiting of the return discharge body 3 in the containing cavity 16 and electrically connect the data storage module 31 with the data acquisition module 2, so that after the dissolvable shell 1 is dissolved, the return discharge body 3 can be separated from the data acquisition module 2 and released from the containing cavity 16, but in order to ensure that the return discharge body 3 can be successfully released, as shown in FIG. 4, the data acquisition device 100 further comprises a conductive elastic structure 5, the conductive elastic structure 5 is in a compressed state between the return discharge body 3 and the data acquisition module 2, and the return discharge body 3 is in abutting contact with the conductive elastic structure 5, and the data storage module 31 is electrically connected with the data acquisition module 2 through the conductive elastic structure 5. When the dissolvable shell 1 is dissolved and one side of the return discharge body 3 loses the limiting force, the return discharge body 3 will be released from the containing cavity 16 under the action of the elastic restoring force of the conductive elastic structure 5.

[0073] Specifically, the conductive elastic structure 5 includes a plurality of spring pins 51 arranged at intervals, and can also be other elastic structures made of conductive material. The spring pins 51 can be two to ten. One end of the spring pins 51 can be fixed on the data acquisition and processing chip 21 by welding or other fixed connection, and the other end of the spring pins 51 is in contact with the return body 3 and is electrically connected with the internal data storage module 31. The return body 3 can be provided with a plurality of limiting grooves matched with the end portions of the plurality of spring pins 51, the end portions of the plurality of spring pins 51 can directly abut against the data storage module 31 inside the return body 3 to contact and transmit data and current through the plurality of spring pins 51; or the return body 3 can be provided with a plurality of conductive portions connected with the data storage module 31, the end portions of the plurality of spring pins 51 abut against the plurality of conductive portions; or the hollow shell 1 of the return body 3 is made of conductive material and is electrically connected with the data storage module 31, and the end portions of the plurality of spring pins 51 abut against the hollow shell 1 of the return body 3.

[0074] According to one embodiment of the present application, as shown in FIG. 2, the data acquisition device 100 further includes a reinforcing elastic structure 6, which is in a compressed state and is arranged between the return body 3 and the soluble shell 1, and the return body 3 abuts against the reinforcing elastic structure 6.

[0075] Specifically, as shown in FIG. 4, in order to further improve the reliability of the release of the return body 3, the data acquisition device 100 further includes a reinforcing elastic structure 6, which is in a compressed state and is arranged between the return body 3 and the soluble shell 1, and the return body 3 abuts against the reinforcing elastic structure 6. By arranging the reinforcing elastic structure 6, when the soluble shell 1 is dissolved and the one side of the reinforcing elastic structure 6 loses the limiting force, the elastic restoring force is released, thereby pressing the return body 3 downward to the conductive elastic structure 5 to increase the compression degree of the conductive elastic structure 5, and further releasing a larger elastic restoring force to push the return body 3 out of the accommodating cavity 16.

[0076] The reinforcing elastic structure 6 includes a spring 61, and can also be other elastic members. As shown in FIG. 2, the first recess 161 is provided with a first step surface, the second recess 162 is provided with a second step surface, and the data acquisition and processing chip 21, the conductive elastic structure 5, the return body 3 and the reinforcing elastic structure 6 are limited in the axial direction of the soluble shell 1 between the second step surface and the first step surface. As shown in FIG. 4, the data acquisition and processing chip 21, the conductive elastic structure 5, the return body 3 and the reinforcing elastic structure 6 are limited in the axial direction of the soluble shell 1 between the groove bottom surface of the second recess 162 and the groove bottom surface of the first recess 161.

[0077] In summary, the data acquisition device 100 of the embodiment of the present application has at least the following beneficial effects:

[0078] First, the shell 1 in the embodiment of the application is designed as a large and small spherical surface plus a smooth transition surface. When the shell 1 is used in the downhole casing 300 environment, the overall outer diameter of the shell 1 does not exceed the inner diameter of the casing 300. Compared with other non-spherical shell 1 structures, the length is shorter and the volume is smaller.

[0079] Second, the shell 1 in the embodiment of the application is designed as a large and small spherical surface plus 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 obvious left and right ends, and the first sensor 22 is installed at both ends. When the shell 1 enters the downhole casing 300 and continuously turns, the large-diameter spherical surface (the first spherical surface 111) or the small-diameter spherical surface (the second spherical surface 121) can keep the other spherical surface in the opposite position on the central axis when it is seated on the spherical surface 204. In the reservoir reconstruction construction, the sealing effect of the downhole isolation tool 200 can be effectively judged. If the pressure difference between the left and right ends of the shell 1 (the two ends sealed by the downhole isolation tool 200) is different, it indicates that the downhole isolation tool 200 is effective. Correspondingly, if there is no pressure difference between the left and right ends of the shell 1 (the two ends sealed by the downhole isolation tool 200), it indicates that the sealing is ineffective. Further, the pressure, temperature or flow rate of the current fracturing section and the adjacent fractured section can be determined in the fracturing construction. After the data storage module 31 is recovered after the blowout and discharge, the sealing effectiveness of the downhole isolation tool 200 and the downhole construction conditions can be analyzed and judged by reading the downhole parameters in the fracturing construction process. The problem that the existing downhole collection device cannot analyze and judge the sealing effect of the reservoir reconstruction isolation tool is effectively solved.

[0080] Third, the shell 1 in the embodiment of the application is designed as a large and small spherical surface plus a smooth transition surface. When the large-diameter spherical surface (the first spherical surface 111) and the small-diameter spherical surface (the second spherical surface 121) are not seated on the spherical surface 204, the smooth transition surface can smoothly ensure that the spherical surface is seated on the spherical surface 204 through relative sliding, so as to normally collect data such as pressure and temperature on both sides.

[0081] Fourth, the data storage module 31 is built in the discharge body 3, and the discharge body 3 is built in the data collection device 100. The volume of the discharge body 3 is minimized. After the soluble shell 1 is dissolved, the discharge body 3 can return to the wellhead under the blowout pressure. Then, the data storage module 31 is recovered after capturing the discharge body 3. The downhole data stored in the data storage module 31 can be read, and the reliability of the discharge body 3 returning to the launching port is improved. The problem that the large-size spherical body in the commonly used discharge mode is difficult to discharge in deep wells, long horizontal wells and low-pressure wells, has low reliability and poor implementability is effectively solved.

[0082] Fifth, the embodiment of the application can effectively reduce the overall weight of the flowback body 3 by filling the flowback body 3 with light material or using light material to make the flowback body 3, so that the density of the flowback body 3 is less than the density of the downhole fluid medium, thereby floating in the liquid and being easy to flow back after the blowout.

[0083] Sixth, the embodiment of the application sets the compressive conductive elastic structure 5 between the flowback body 3 and the data acquisition module 2, which can realize the electrical connection between the data acquisition module 2 and the data storage module 31, and can use the elastic restoring force of the conductive elastic structure 5 to push out the flowback body 3 after the soluble shell 1 is dissolved.

[0084] Seventh, the embodiment of the application sets the compressive reinforcing elastic structure 6 between the flowback body 3 and the soluble shell 1, which can further improve the elastic restoring force of the conductive elastic structure 5 after the shell 1 is dissolved, and ensure that the flowback body 3 can be successfully pushed out and released into the wellbore.

[0085] Embodiment two:

[0086] The embodiment of the application also provides a shuttle-shaped data acquisition device 400, as shown in FIG. 5, which includes a shell 1, a data acquisition module 2, a wireless transmission module 24 and a power supply module 4. The shell 1 has a first end 11 and a second end 12 located at both ends of the axis thereof, and has a middle section 401 located between the first end 11 and the second end 12. The outer surface of the first end 11 and the outer surface of the second end 12 are spherical surfaces with the same diameter, and the outer surface of the middle section 401 is a spherical surface with a diameter greater than the diameter of the end spherical surface. The shell 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 block the ball seat 201; the data acquisition module 2 is installed in the shell 1, and the first end 11 and the second end 12 of the shell 1 are provided with detection channels 17, and the data acquisition module 2 has a data acquisition and processing chip 21 and a first sensor 22 arranged in the detection channel 17. The data acquisition and processing chip 21 is electrically connected with the first sensor 22, and 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 in the data acquisition and processing chip 21.

[0087] The shuttle-shaped data acquisition device 400 has a housing 1 with two ends, which can prevent the housing 1 from being unable to be seated and sealed during the lowering process in the wellbore, and the housing 1 is integrated with the data acquisition function, that is, the shuttle-shaped data acquisition device 400 has the sealing and acquisition integration and anti-rolling functions. At the same time, the housing 1 in the embodiment of the application will fall into the ball seat 201 of the downhole sealing tool 200 with the first end 11 or the second end 12 facing forward to block the ball seat 201, so that the pressure, temperature or flow data of the two sides of the downhole sealing tool 200 can be obtained through the detection channels 17 arranged at the two ends, and the downhole parameters such as the pressure, temperature or flow of the current fracturing section and the adjacent fractured section can be determined during the fracturing operation.

[0088] Specifically, as shown in FIG. 5, the shuttle-shaped data acquisition device 400 has a housing 1, the housing 1 includes a first housing 14 and a second housing 15, the first housing 14 is provided with a first groove 161, the second housing 15 is provided with a second groove 162, the first housing 14 and the second housing 15 are butted and matched to form a containing cavity 16 by matching the first groove 161 and the second groove 162, the containing cavity 16 is used for containing a data acquisition module 2, a data storage module 31, a wireless transmission module 24 and a power supply module 4, one end of the first housing 14 away from the second housing 15 forms a first end 11, one end of the second housing 15 away from the first housing 14 forms a second end 12, and the butting position of the first housing 14 and the second housing 15 forms a middle section 401.

[0089] 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, and 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.

[0090] 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 housing 1 is a smooth transition surface 13 that can connect two adjacent spherical surfaces smoothly, so that the housing 1 is in the shape of a shuttle. The centers of the first spherical surface 111 and the second spherical surface 121 are located on the central axis of the housing 1, and the smooth transition surface 13 is formed by rotating a smooth curve around the central axis of the housing 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 circular arc that is recessed towards the central axis of the housing 1, and of course the smooth curve can also be a straight line with a transition part at both ends.

[0091] Further, 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 opened in the first shell 14, and the second detection channel 172 is opened in the second shell 15. One end of the first detection channel 171 penetrates to the outer surface of the first end 11, and the other end of the first detection channel 171 is in communication with the containing cavity 16 in the shell 1; one end of the second detection channel 172 penetrates to the outer surface of the second end 12, and the other end of the second detection channel 172 is in communication with the containing cavity 16 in the shell 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.

[0092] The data acquisition module 2 is arranged in the shell 1, and the data acquisition module 2 has a data acquisition and processing chip 21 fixedly installed in the containing cavity 16 and a first sensor 22 arranged in the detection channel 17, the first detection channel 171 and the second detection channel 172 are each provided with the first sensor 22, and the two first sensors 22 are connected with 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 with the fluid media on both sides of the downhole packer 200, so as to measure the fluid parameters on both sides of the downhole packer 200.

[0093] The data storage module 31 is integrated on the data acquisition and processing chip 21, and the data storage module 31 is electrically connected with 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, and the 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.

[0094] In an alternative embodiment, the shuttle-shaped data acquisition device 400 can realize downhole data transmission and recovery through radio, and further includes a wireless transmission module 24 and a power supply module 4. As shown in FIG. 5, the wireless transmission module 24 is integrated on the data acquisition and processing chip 21, and the wireless transmission module 24 is electrically connected with the data storage module 31 to emit the stored data in the data storage module 31 through radio. The power supply module 4 can be fixedly installed in the containing cavity 16 and electrically connected with the data storage module 31 and the wireless transmission module 24 through the wires 23 to supply power for the two; the power supply module 4 can also be integrated on the data acquisition and processing chip 21 to supply power for the data acquisition and processing chip 21, and supply power for the data storage module 31, the first sensor 22 and the wireless transmission module 24 through the data acquisition and processing chip 21.

[0095] In another alternative embodiment, the shuttle-shaped data acquisition device 400 can also realize downhole data recovery through the way of dissolving flowback (not shown in the figure, the structure of the way of dissolving flowback is basically the same as that in the first embodiment), the shell 1 is a soluble shell 1, the shuttle-shaped data acquisition device 400 further comprises a flowback body 3, the flowback body 3 is installed in the soluble shell 1, the data storage module 31 is arranged in the flowback body 3, and the flowback body 3 can be released from the soluble shell 1 into the fluid medium and carry the data storage module 31 to return with the fluid medium after the soluble shell 1 is dissolved.

[0096] The material of the conventional shell 1 can be steel, resin, plastic, rubber and various common materials, and the material of the soluble shell 1 in the embodiment is soluble aluminum or soluble magnesium alloy, that is, the first shell 14 and the second shell 15 can be made of soluble metal in whole or in part, and of course other materials soluble in the fluid medium can be used to make the soluble shell 1 according to the characteristics of the fluid medium; the soluble shell 1 is not limited to being dissolved in whole to release the flowback body 3 after a preset time, but can be partially dissolved to form a release port for the flowback body 3 to be released from the release port after a preset time. A screen can be arranged at the drop port to capture and collect the returned flowback body 3. In the embodiment of the application, the preset time is four to ten hours.

[0097] Specifically, the material of the flowback body 3 has a density less than 1 g / cm 3 In the embodiment, the density of the flowback body 3 is 0.5 g / cm 3 ~0.9 g / cm 3 The flowback body 3 can be made of light materials such as plastic alloy, polyester fiber or resin to meet the density requirement, or can be a hollow shell filled with light materials to meet the density requirement. In addition, in order to ensure that the flowback body 3 can carry the data storage module 31 to return to the drop port, the volume of the flowback body 3 is as small as possible.

[0098] Preferably, the shuttle-shaped data acquisition device 400 further comprises a conductive elastic structure 5, the conductive elastic structure 5 is in a compressed state and arranged between the flowback body 3 and the data acquisition module 2, the flowback body 3 is in abutting contact with the conductive elastic structure 5, and the data storage module 31 is electrically connected with the data acquisition module 2 through the conductive elastic structure 5.

[0099] Specifically, one side of the backflow body 3 is in abutting contact with the data acquisition module 2, and the other side of the backflow body 3 is in abutting contact with the soluble shell 1, so as to realize the limiting of the backflow body 3 in the containing cavity 16 and the electrical connection between the data storage module 31 and the data acquisition module 2, so that the backflow body 3 can be separated from the data acquisition module 2 and released from the containing cavity 16 after the soluble shell 1 is dissolved. In order to ensure that the backflow body 3 can be successfully released, the shuttle-shaped data acquisition device 400 further comprises a conductive elastic structure 5, which is in a compressed state and is arranged between the backflow body 3 and the data acquisition module 2, and the backflow body 3 is in abutting 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 and one side of the backflow body 3 loses the limiting force, the backflow body 3 is released from the containing cavity 16 under the elastic restoring force of the conductive elastic structure 5.

[0100] Embodiment three:

[0101] The capsule-shaped data acquisition device 500 provided by the embodiment of the present application comprises a shell 1, a data acquisition module 2, a data storage module 31, a wireless transmission module 24 and a power supply module 4. The shell 1 has a first end 11 and a second end 12 located at both ends of the axis thereof, and further has a middle section 501 connecting the first end 11 and the second end 12. The outer surface of the first end 11 and the outer surface of the second end 12 are spherical surfaces with the same diameter, and the outer surface of the middle section 501 is a cylindrical side surface 502 connecting the two spherical surfaces, so that the shell 1 is in a capsule shape. The shell 1 can be placed into the ball seat 201 of the downhole packer 200 with the first end 11 or the second end 12 facing forward and block the ball seat 201. The data acquisition module 2 is installed in the shell 1. The first end 11 and the second end 12 of the shell 1 are provided with detection channels 17. The data acquisition module 2 has a data acquisition and processing chip 21 and a first sensor 22 arranged 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 for detecting the fluid parameters on both sides of the downhole packer 200. The data storage module 31 is integrated in the data acquisition and processing chip 21.

[0102] The capsule-shaped data acquisition device 500 has a capsule-shaped shell 1 with obvious two ends, which can prevent the shell 1 from being unable to seat and seal during the lowering process in the wellbore after continuous turning in the wellbore, and the shell 1 is integrated with the data acquisition function, that is, the capsule-shaped data acquisition device 500 has the functions of sealing and acquisition integration and anti-turning. At the same time, the shell 1 in the embodiment of the application will fall into the ball seat 201 of the downhole packer 200 with the first end 11 or the second end 12 facing forward to block the ball seat 201, so that the pressure, temperature or flow data on both sides of the downhole packer 200 can be obtained through the detection channels 17 arranged at both ends, and the downhole parameters such as pressure, temperature or flow of the current fracturing section and the adjacent fractured section can be determined during fracturing operation.

[0103] Specifically, as shown in FIG. 6, the capsule-shaped data acquisition device 500 has a shell 1, the shell 1 includes a first shell 14 and a second shell 15, the first shell 14 is provided with a first groove 161, the second shell 15 is provided with a second groove 162, the first shell 14 and the second shell 15 are butted and matched, and the first groove 161 and the second groove 162 are matched to form a containing cavity 16, the containing cavity 16 is used for containing a data acquisition module 2, a data storage module 31, a wireless transmission module 24 and a power supply module 4, an end of the first shell 14 away from the second shell 15 forms a first end 11, an end of the second shell 15 away from the first shell 14 forms a second end 12, and a middle section 501 is formed between the first end 11 and the second end 12.

[0104] 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, the outer surface of the middle section 501 is a cylindrical side surface 502, and 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 connected to the first spherical surface 111 and the second spherical surface 121 in a smooth transition manner, so that the shell 1 has a capsule shape.

[0105] Further, 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 arranged in the first shell 14, and the second detection channel 172 is arranged in the second shell 15. One end of the first detection channel 171 penetrates to the outer surface of the first end 11, and the other end of the first detection channel 171 communicates with the containing cavity 16 in the shell 1; one end of the second detection channel 172 penetrates to the outer surface of the second end 12, and the other end of the second detection channel 172 communicates with the containing cavity 16 in the shell 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.

[0106] The data acquisition module 2 is arranged in the shell 1, and the data acquisition module 2 has a data acquisition and processing chip 21 fixedly arranged in the accommodating cavity 16 and a first sensor 22 arranged in the detection channel 17. The first sensor 22 is arranged in the first detection channel 171 and the second detection channel 172. The two first sensors 22 are connected with 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 with the fluid media on both sides of the downhole packer 200, so as to measure the fluid parameters on both sides of the downhole packer 200.

[0107] The data storage module 31 is integrated on the data acquisition and processing chip 21, and the data storage module 31 is electrically connected with 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 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.

[0108] In an alternative embodiment, the capsule-shaped data acquisition device 500 can realize downhole data transmission and recovery through radio. The capsule-shaped data acquisition device 500 further comprises a wireless transmission module 24 and a power supply module 4. As shown in FIG. 6, the wireless transmission module 24 is integrated on the data acquisition and processing chip 21, and the wireless transmission module 24 is electrically connected with the data storage module 31 to emit the stored data in the data storage module 31 through radio. The power supply module 4 can be fixedly arranged in the accommodating cavity 16 and electrically connected with the data storage module 31 and the wireless transmission module 24 through the wires 23 to supply power for the two. The power supply module 4 can be integrated on the data acquisition and processing chip 21 to supply power for the data acquisition and processing chip 21 and supply power for the data storage module 31, the first sensor 22 and the wireless transmission module 24 through the data acquisition and processing chip 21.

[0109] In another alternative embodiment, the capsule-shaped data acquisition device 500 can also realize downhole data recovery through dissolution flowback (not shown in the figure, the structure of the dissolution flowback is basically the same as that in the first embodiment). The shell 1 is a soluble shell 1. The capsule-shaped data acquisition device 500 further comprises a flowback body 3. The flowback body 3 is arranged in the soluble shell 1. The data storage module 31 is arranged in the flowback body 3. The flowback body 3 can be released from the soluble shell 1 into the fluid medium and carry the data storage module 31 to return with the fluid medium after the soluble shell 1 is dissolved.

[0110] The material of the conventional shell 1 can be steel, resin, plastic, rubber, etc. The material of the soluble shell 1 in the embodiment is soluble aluminum or soluble magnesium alloy, i.e. the first shell 14 and the second shell 15 can be made of soluble metal entirely or partially. Of course, other materials soluble in the fluid medium can be used to make the soluble shell 1 according to the characteristics of the fluid medium. The soluble shell 1 is not limited to being dissolved entirely to release the flowback body 3 after the preset time. The soluble shell 1 can be partially dissolved to form a release opening after the preset time, so that the flowback body 3 can be released from the release opening. A screen can be arranged at the drop opening to capture and collect the flowback body 3. In the embodiment, the preset time is four to ten hours.

[0111] Specifically, the density of the flowback body 3 is less than 1 g / cm 3 In the embodiment, the density of the flowback body 3 is 0.5 g / cm 3 ~ 0.9 g / cm 3 The flowback body 3 can be made of plastic alloy, polyester fiber or resin, etc. to meet the density requirement. Alternatively, the flowback body 3 can be a hollow shell filled with light material to meet the density requirement. In addition, the volume of the flowback body 3 is as small as possible to ensure that the flowback body 3 can carry the data storage module 31 back to the drop opening.

[0112] Preferably, the capsule-shaped data collection device 500 further comprises a conductive elastic structure 5 arranged between the flowback body 3 and the data collection module 2 in a compressed state, and the flowback body 3 is in abutting contact with the conductive elastic structure 5, and the data storage module 31 is electrically connected with the data collection module 2 through the conductive elastic structure 5.

[0113] Specifically, one side of the flowback body 3 is in abutting contact with the data collection module 2, and the other side of the flowback body 3 is in abutting contact with the soluble shell 1, so as to limit the flowback body 3 in the containing cavity 16 and electrically connect the data storage module 31 with the data collection module 2. After the soluble shell 1 is dissolved, the flowback body 3 can be separated from the data collection module 2 and released from the containing cavity 16. In order to ensure that the flowback body 3 can be successfully released, the capsule-shaped data collection device 500 further comprises a conductive elastic structure 5 arranged between the flowback body 3 and the data collection module 2 in a compressed state, and the flowback body 3 is in abutting contact with the conductive elastic structure 5, and the data storage module 31 is electrically connected with the data collection module 2 through the conductive elastic structure 5. When one side of the flowback body 3 loses the limiting force due to the dissolution of the soluble shell 1, the flowback body 3 can be released from the containing cavity 16 under the elastic restoring force of the conductive elastic structure 5.

[0114] Embodiment four:

[0115] The embodiment of the present application also provides a downhole data acquisition method, which is implemented by using the data acquisition device as described in the first to third embodiments, and comprises the following steps: dropping the shell 1 from the wellhead to the downhole, so that the shell 1 falls into the ball seat 201 of the downhole isolation tool 200 with the first end 11 or the second end 12 facing forward and blocks the ball seat 201; the data acquisition module 2 in the shell 1 acquires the fluid parameters on both sides of the downhole isolation tool 200 by the first sensor 22 in the detection channel 17; and the data acquisition module 2 transmits the fluid parameters to the data storage module 31 for storage.

[0116] The data acquisition device 100 in the embodiment has the same specific structure, working principle and beneficial effects as the data acquisition device 100 in the first embodiment, and thus will not be described here again.

[0117] Further, the data acquisition module 2 further comprises a second sensor, and the downhole data acquisition method further comprises the following steps: the data acquisition module 2 in the shell 1 simultaneously measures the motion parameters of the shell 1 by the second sensor, and the data acquisition module 2 transmits the motion parameters to the data storage module 31 for storage.

[0118] Further, the data acquisition module 2 further comprises a data acquisition processing chip 21, the data acquisition processing chip 21 is electrically connected with the first sensor 22, the second sensor and the data storage module 31 respectively; the fluid parameters comprise the pressure, temperature, salinity and / or pH value of the downhole fluid, the motion parameters comprise the displacement, velocity, acceleration, momentum and / or deflection angle of the shell 1; and the data transmitted to the data storage module 31 comprises the fluid parameters, the motion parameters, and analysis parameters, analysis curves and / or analysis images generated by the data acquisition processing chip 21 according to the above parameters.

[0119] In another embodiment of the present application, as shown in FIGS. 6 and 7, the data acquisition device 100 further comprises a wireless transmission module 24, the wireless transmission module 24 is electrically connected with the data storage module 31, and the downhole data acquisition method further comprises the following steps: the wireless transmission module 24 transmits the data stored in the data storage module 31 in the form of radio waves, and a reading device (reading sub 600) arranged at the wellhead or downhole can receive the radio signals.

[0120] Specifically, for long distance downhole data collection, the data storage module 31 collects the data and sends the collected data to the wellhead through wireless transmission by the wireless transmission module 24. The wireless transmission data transmitted from the downhole is received and analyzed by the ground reading device at the wellhead. For short and medium distance downhole data collection, as shown in FIG. 7, the data collection module 2 transmits the downhole data to the data storage module 31. After the data storage module 31 completes the collection, the wireless transmission module 24 transmits the collected data. At this time, the reading sub 600 is lowered from the ground 700. The reading sub 600 is lowered from the wellhead through the cable 601 and provides power. When the reading sub 600 approaches the collection device, the data transmitted by the wireless transmission module 24 is automatically collected. The data is read and interpreted on the ground 700. After the interpretation is completed, the reading sub 600 is raised to the wellhead.

[0121] In another embodiment of the present application, as shown in FIGS. 1 and 2, the housing 1 is a soluble housing 1. The data collection device 100 further comprises a flowback body 3 installed in the soluble housing 1. The data storage module 31 is arranged in the flowback body 3. The downhole data collection method further comprises the following steps: after the housing 1 is lowered into the downhole for a predetermined time, the soluble housing 1 is dissolved by the downhole fluid. The flowback body 3 is released from the soluble housing 1 and carries the data storage module 31 back to the wellhead with the downhole fluid.

[0122] In another embodiment of the present application, a plurality of soluble housings 1 can be sequentially placed in a plurality of well sections or layer positions, and then the data collection modules 2 in the plurality of soluble housings 1 collect data of different well sections or layer positions. Alternatively, the downhole isolation tool 200 is isolated below the well section to be fractured or the layer position to be fractured. Then, the ball seat 201 of the downhole isolation tool 200 is blocked by placing the soluble housing 1. Then, the fracturing operation is performed in the well section to be fractured or the layer position to be fractured. The data collection module 2 in the soluble housing 1 collects data during the fracturing operation. Then, the downhole data of adjacent two fractured well sections or layer positions is analyzed to determine the effectiveness of the downhole isolation tool 200.

[0123] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present application. It should be understood that the above description is only a specific embodiment of the present application and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A data acquisition device, wherein, The application relates to a downhole packer, which comprises the following parts: a shell (1) having a first end (11) and a second end (12) located at both ends of the axis, the outer surface of the first end (11) and the outer surface of the second end (12) being spherical surfaces with different diameters, the shell (1) being capable of falling into a ball seat (201) of a downhole packer (200) with the first end (11) or the second end (12) facing forward and blocking the ball seat (201); a data acquisition module (2) installed in the shell (1), the first end (11) and the second end (12) of the shell (1) being provided with detection channels (17), the data acquisition module (2) being provided with a first sensor (22) arranged in the detection channel (17), and the first sensor (22) being used for detecting fluid parameters on both sides of the downhole packer (200); a data storage module (31) electrically connected with the data acquisition module (2); wherein the outer surface of the shell (1) between the first end (11) and the second end (12) is a smooth transition curved surface (13) capable of connecting two smooth transition spherical surfaces.

2. The data acquisition device of claim 1, wherein, In the two spherical surfaces of the first end (11) and the second end (12), the arc range of one of the spherical surfaces is 5pi / 4 to 7pi / 5, and the diameter range is 55mm to 90mm; the arc range of the other spherical surface is 4pi / 5 to pi, and the diameter range is 35mm to 65mm.

3. The data acquisition device of claim 2, wherein, The centers of the two spherical surfaces of the first end (11) and the second end (12) are located on the central axis of the shell (1), and the detection channels (17) arranged on the first end (11) and the second end (12) are respectively located at the centers of the corresponding spherical surfaces.

4. The data acquisition device of claim 3, wherein, The smooth transition curved 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 with the two spherical surfaces along the tangent directions of the ends of the two spherical surfaces, and the middle part of the smooth curve is a transition circular arc 131 which is recessed towards the central axis of the shell (1), the diameter range of the transition circular arc 131 is 250mm to 470mm, and the arc range is pi / 18 to pi / 15.

5. The data acquisition device of claim 1, wherein, The data acquisition module (2) comprises a data acquisition processing chip (21) and the first sensor (22), the data acquisition processing chip (21) is electrically connected with the first sensor (22) and the data storage module (31) respectively.

6. The data acquisition device of claim 5, wherein, The detection channel (17) comprises at least one first detection channel (171) and at least one second detection channel (172), one end of the first detection channel (171) penetrates through the outer surface of the first end (11), one end of the second detection channel (172) penetrates through the outer surface of the second end (12), and the first sensor (22) in the first detection channel (171) and the first sensor (22) in the second detection channel (172) can be in contact with the fluid medium on both sides of the downhole packer tool (200), respectively.

7. The data acquisition device of claim 6, wherein, The shell (1) comprises a first shell (14) and a second shell (15), the first shell (14) is provided with a first groove (161), the second shell (15) is provided with a second groove (162), the first shell (14) and the second shell (15) are in abutting fit and the first groove (161) and the second groove (162) cooperate to form a containing cavity (16), the data acquisition and processing chip (21) and the data storage module (31) are both arranged in the containing cavity (16), and one end of the first shell (14) away from the second shell (15) forms the first end (11), and one end of the second shell (15) away from the first shell (14) forms the second end (12).

8. The data acquisition device of claim 5, wherein, The data acquisition module (2) further comprises a second sensor for measuring the motion parameters of the shell (1), and the second sensor is electrically connected with the data acquisition and processing chip (21).

9. The data acquisition device of claim 5, wherein, The data acquisition device (100) further comprises a power supply module (4) integrated on the data acquisition and processing chip (21).

10. The data acquisition device of claim 5, wherein, The data acquisition device (100) further comprises a wireless transmission module (24) integrated on the data acquisition and processing chip (21), and the wireless transmission module (24) is electrically connected with the data storage module (31) to transmit the stored data in the data storage module (31) wirelessly.

11. The data acquisition device of claim 1, wherein, The shell (1) is a soluble shell (1), the data acquisition device (100) further comprises a flowback body (3) installed in the soluble shell (1), the data storage module (31) is arranged in the flowback body (3), and the flowback body (3) can be released from the soluble shell (1) into a fluid medium and carry the data storage module (31) back with the fluid medium after the soluble shell (1) is dissolved.

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

13. The data acquisition device of claim 11 or 12, wherein, The data acquisition device (100) further comprises an electrically-conductive elastic structure (5) arranged in a compressed state between the flowback body (3) and the data acquisition module (2), and the flowback body (3) is in abutting contact with the electrically-conductive elastic structure (5), and the data storage module (31) is electrically connected with the data acquisition module (2) through the electrically-conductive elastic structure (5).

14. The data acquisition device of claim 13, wherein, The data acquisition device (100) further comprises a reinforcing elastic structure (6) arranged in a compressed state between the flowback body (3) and the soluble shell (1), and the flowback body (3) is in abutting contact with the reinforcing elastic structure (6).

15. The data acquisition device of claim 14, wherein, The electrically-conductive elastic structure (5) comprises a plurality of spring thimbles (51) arranged at intervals, and the reinforcing elastic structure (6) comprises a spring (61).

16. The data acquisition device of claim 11 or 12, wherein, The flowback body (3) returns with the fluid medium by using the blowout pressure of the fluid medium and / or by using the buoyancy of the fluid medium.

17. The data acquisition device of claim 11, wherein, The density of the material of the flowback body (3) is less than 1 g / cm 3 .

18. The data acquisition device of claim 11, wherein, The material of the soluble shell (1) is soluble aluminum or a soluble magnesium alloy.

19. A data acquisition device, wherein, Comprise: A shell (1) having a first end (11) and a second end (12) located at both ends of an axis thereof, and a middle section (401) located between the first end (11) and the second end (12), the outer surface of the first end (11) and the outer surface of the second end (12) being spherical surfaces with the same diameter, and the outer surface of the middle section (401) being a spherical surface with a diameter larger than the diameter of the spherical surfaces at the ends, the shell (1) being capable of falling into a ball seat (201) of a downhole packer tool (200) with the first end (11) or the second end (12) facing forward and blocking the ball seat (201); A data acquisition module (2) installed in the shell (1), the first end (11) and the second end (12) of the shell (1) being provided with detection channels (17), the data acquisition module (2) having a data acquisition and processing chip (21) and a first sensor (22) arranged in the detection channel (17), the data acquisition and processing chip (21) being electrically connected with the first sensor (22), and the first sensor (22) being used for detecting fluid parameters on both sides of the downhole packer tool (200); A data storage module (31) integrated in the data acquisition and processing chip (21). Wherein, 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 curved surface (13) capable of smoothly connecting two adjacent spherical surfaces.

20. The data acquisition device of claim 19, wherein, The data acquisition device further comprises: A wireless transmission module (24) is integrated on the data acquisition processing chip (21) to transmit the stored data in the data storage module (31) wirelessly; A power supply module (4) is electrically connected with the data acquisition processing chip (21).

21. The data acquisition device of claim 19, wherein, The shell (1) is a soluble shell (1), and the data acquisition device further comprises a flowback body (3) installed in the soluble shell (1), wherein the data storage module (31) is arranged in the flowback body (3), and the flowback body (3) can be released from the soluble shell (1) into a fluid medium after the soluble shell (1) is dissolved and carry the data storage module (31) back with the fluid medium.

22. The data acquisition device of claim 21, wherein, The data acquisition device further comprises an electrically-conductive elastic structure (5) arranged in a compressed state between the flowback body (3) and the data acquisition module (2), and the flowback body (3) is in abutting contact with the electrically-conductive elastic structure (5), and the data storage module (31) is electrically connected with the data acquisition module (2) through the electrically-conductive elastic structure (5).

23. The data acquisition device of claim 22, wherein, The data acquisition device further comprises a reinforcing elastic structure (6) arranged in a compressed state between the flowback body (3) and the soluble shell (1), and the flowback body (3) is in abutting contact with the reinforcing elastic structure (6).

24. A data acquisition device, wherein, Comprise: A shell (1) has a first end (11) and a second end (12) at both ends of an axis, and a middle section (501) connecting the first end (11) and the second end (12), the outer surface of the first end (11) and the outer surface of the second end (12) are spherical surfaces with the same diameter, and the outer surface of the middle section (501) is a cylindrical side surface (502) connecting the two spherical surfaces; the shell (1) can fall into the ball seat (201) of the downhole packer (200) with the first end (11) or the second end (12) forward and block the ball seat (201); A data acquisition module (2) is installed in the shell (1), and the first end (11) and the second end (12) of the shell (1) are provided with detection channels (17), the data acquisition module (2) has a data acquisition processing chip (21) and a first sensor (22) arranged in the detection channel (17), the data acquisition processing chip (21) is electrically connected with the first sensor (22), and the first sensor (22) is used for detecting fluid parameters on both sides of the downhole packer (200); A data storage module (31) is integrated in the data acquisition processing chip (21).

25. The data acquisition device of claim 24, wherein, The data acquisition device further comprises: A wireless transmission module (24) is integrated on the data acquisition processing chip (21) to transmit the stored data in the data storage module (31) wirelessly; A power supply module (4) is electrically connected with the data acquisition and processing chip (21).

26. The data acquisition device of claim 24, wherein, The shell (1) is a dissolvable shell (1), and the data acquisition device further comprises a flowback body (3) installed in the dissolvable shell (1), and the data storage module (31) is arranged in the flowback body (3), and the flowback body (3) can be released from the dissolvable shell (1) into a fluid medium after the dissolvable shell (1) is dissolved and carry the data storage module (31) back with the fluid medium.

27. The data acquisition device of claim 26, wherein, The data acquisition device further comprises an electrically-conductive elastic structure (5) arranged in a compressed state between the flowback body (3) and the data acquisition module (2), and the flowback body (3) is in abutting contact with the electrically-conductive elastic structure (5), and the data storage module (31) is electrically connected with the data acquisition module (2) through the electrically-conductive elastic structure (5).

28. The data acquisition device of claim 27, wherein, The data acquisition device further comprises a reinforcing elastic structure (6) arranged in a compressed state between the flowback body (3) and the dissolvable shell (1), and the flowback body (3) is in abutting contact with the reinforcing elastic structure (6).

29. A method of downhole data acquisition, wherein, The downhole data acquisition method is implemented by using the data acquisition device according to any one of claims 1, 19 and 24, and the method comprises the following steps: The shell (1) is dropped into a downhole from a wellhead, and the shell (1) can fall into a ball seat (201) of a downhole isolation tool (200) with the first end (11) or the second end (12) facing forward and block the ball seat (201); The data acquisition module (2) in the shell (1) acquires fluid parameters on both sides of the downhole isolation tool (200) through a first sensor (22) in a detection channel (17); The data acquisition module (2) transmits the fluid parameters to the data storage module (31).

30. The method of collecting data downhole of claim 29, wherein, The data acquisition module (2) further comprises a second sensor, and the downhole data acquisition method further comprises the following steps: The data acquisition module (2) in the shell (1) simultaneously measures motion parameters of the shell (1) through the second sensor.

31. The method of collecting data downhole of claim 30, wherein, The data acquisition module (2) further comprises a data acquisition and processing chip (21) electrically connected with the first sensor (22), the second sensor and the data storage module (31) respectively; The fluid parameters include pressure, temperature, salinity and / or pH value of the downhole fluid, and the motion parameters include displacement, velocity, acceleration, momentum and / or deflection angle of the shell (1); The data transmitted to the data storage module (31) include the fluid parameters, the motion parameters, analysis parameters, analysis curves and / or analysis images generated by the data acquisition and processing chip (21) according to the above parameters.

32. The downhole data acquisition method of any of claims 29-31, wherein, The data acquisition device (100) further comprises a wireless transmission module (24) electrically connected with the data storage module (31), and the downhole data acquisition method further comprises the following steps: The wireless transmission module (24) transmits the data stored in the data storage module (31) in a wireless manner, and a reading device arranged at a wellhead or downhole receives the wireless signal.

33. The downhole data acquisition method of any of claims 29-31, wherein, The shell (1) is a soluble shell (1), and the data acquisition device (100) further comprises a flowback body (3) installed in the soluble shell (1), and the data storage module (31) is arranged in the flowback body (3), and the downhole data acquisition method further comprises the following steps: After the shell (1) is lowered downhole for a predetermined time, the soluble shell (1) is dissolved by downhole fluid, the flowback body (3) is released from the soluble shell (1) and carries the data storage module (31) to return to the wellhead with the downhole fluid.

34. The method of acquiring data downhole of claim 33, wherein, A plurality of the soluble shells (1) are sequentially put into a plurality of well sections or layer positions, and then the data acquisition modules (2) in the plurality of the soluble shells (1) acquire data of different well sections or layer positions; or The downhole isolation tool (200) is isolated below a to-be-fractured well section or a to-be-fractured layer position, and then the ball seat (201) of the downhole isolation tool (200) is blocked by putting the soluble shell (1), and then fracturing construction is performed on the to-be-fractured well section or the to-be-fractured layer position, and data is acquired by the data acquisition module (2) in the soluble shell (1) during the fracturing construction.

Images