Output Profile Flow Meter

Abstract

The present invention discloses an output profile flowmeter, which relates to the field of flowmeters and includes a carrier frame, a first measuring component, a second measuring component and a control terminal. The carrier frame includes a first movable support arm and a second movable support arm which are sequentially arranged along a first direction and can rotate around an axis extending along a second direction; the first measuring component includes at least one single target structure and at least two optical fiber gratings (FBGs); the single target structure includes a cantilever beam and a target piece; the cantilever beam is arranged on the first movable support arm and can rotate relative to the first movable support arm around an axis extending along a third direction; the cantilever beam is arranged on two opposite side surfaces and optical fiber gratings are respectively provided, and the two optical fiber gratings on the cantilever beam are arranged correspondingly, and the target piece is arranged on the side of the cantilever beam away from the first movable support arm; the second measuring component includes at least one optical fiber probe, which is rotatably arranged on the second movable support arm and corresponding to the target piece; the control terminal is electrically connected to the optical fiber grating and the optical fiber probe; in this way, the measurement accuracy and applicability are high.

Description

Technical Field

[0001] The present invention relates to the technical field of flow meters, and in particular to an output profile flow meter. Background Art

[0002] With the continuous extraction of oil, the extraction of oil in these oil fields has entered the late stage of secondary oil recovery. Water injection into oil wells has led to the widespread presence of oil, gas, and water phases in the oil wells. Traditional logging instruments for vertical wells are less effective for horizontal wells and cannot accurately measure the flow rate of each phase of fluid in the well. In addition, most flow measurement equipment uses turbine flowmeters, which have high requirements for the purity of oil and gas downhole fluids. In environments with high sand content or high mineral content, sand is easily stuck, causing damage to the turbine or malfunctioning. At the same time, the conductivity and permittivity methods have a large failure range for measuring holdup, and cannot accurately measure gas holdup. In addition, due to the small wellhead of horizontal wells, high requirements are placed on the size of the downhole measurement equipment. Traditional electrical sensors are large in size and difficult to array as a whole. Summary of the Invention

[0003] The main purpose of the present invention is to provide a production profile flowmeter with high measurement accuracy and the ability to effectively solve the problem that traditional flowmeters are too large to be suitable for use in horizontal wells.

[0004] To achieve the above objectives, the present invention proposes a production profile flowmeter for horizontal well flow measurement, the production profile flowmeter comprising:

[0005] The carrier comprises a first movable support arm and a second movable support arm sequentially arranged along a first direction, wherein the first movable support arm and the second movable support arm are respectively rotatable around an axis extending along a second direction, so that the first movable support arm and the second movable support arm can move closer to or farther away from each other along the first direction;

[0006] a first measurement assembly for measuring the fluid flow rate in the horizontal well, comprising at least one single target structure and at least two fiber Bragg gratings (FBGs); the single target structure comprising a cantilever beam and a target plate; the cantilever beam being disposed on the first movable support arm and being rotatable relative to the first movable support arm about an axis extending in a third direction; a fiber Bragg grating being disposed on each of two opposing side surfaces of the cantilever beam; the two fiber Bragg gratings on the cantilever beam being disposed in correspondence with each other and being configured to be electrically connected to an external demodulation device; and the target plate being disposed on a side of the cantilever beam away from the first movable support arm;

[0007] a second measuring assembly for measuring the fluid retention in the horizontal well, comprising at least one optical fiber probe, the optical fiber probe being rotatably disposed on the second movable support arm and being disposed corresponding to the target piece of the single target structure; and

[0008] a control terminal electrically connected to the fiber grating and the fiber probe;

[0009] The first direction, the second direction and the third direction are arranged perpendicular to each other in a plane.

[0010] Optionally, the first measurement assembly includes a plurality of the single target structures and a plurality of the fiber Bragg gratings, and the plurality of the single target structures are sequentially spaced along the length direction of the first movable support arm;

[0011] The second measurement component includes a plurality of the optical fiber probes, which are sequentially spaced along the length of the second movable support arm and are arranged in one-to-one correspondence with the target pieces of the single target structure.

[0012] Optionally, the carrier further comprises a base and a connecting arm spaced apart along the third direction, the base and the connecting arm respectively extending along the first direction and both rotatably connected to the first movable support arm and the second movable support arm, and the length of the connecting arm is smaller than the length of the base;

[0013] The base is used to fit with the bottom of the horizontal well, and the connecting arm is used to fit with the casing in the horizontal well.

[0014] Optionally, the first movable support arm and the second movable support arm respectively include two movable support rods spaced apart along the second direction, and a first connecting rod and a second connecting rod spaced apart along the length direction of the movable support arm, the first connecting rod and the second connecting rod are arranged between the two movable support rods, and are both rotatably connected to the two movable support rods;

[0015] One of the first connecting rod and the second connecting rod is slidably connected to the base, and the other is slidably connected to the connecting arm, so that the first movable supporting arm and the second movable supporting arm can move closer to or farther away from each other along the first direction.

[0016] Optionally, a first sliding groove and a first protrusion adapted for sliding connection are provided between the first connecting rod and the base, one of the first sliding groove and the first protrusion is provided on the first connecting rod, and the other is provided on the base, so that the first connecting rod is slidably connected to the base; and / or,

[0017] A second sliding groove and a second protrusion that are adapted for sliding connection are provided between the second connecting rod and the connecting arm. One of the second sliding groove and the second protrusion is provided on the second connecting rod, and the other is provided on the connecting arm, so that the first connecting rod is slidably connected to the base.

[0018] Optionally, the first measuring assembly further includes at least one first driving member, the first driving member being provided on the first movable support arm and drivingly connected to the cantilever beam to drive the cantilever beam to rotate relative to the first movable support arm around an axis extending along the third direction;

[0019] The control terminal is electrically connected to the first driving member to control the working state of the first driving member.

[0020] Optionally, the second measuring assembly further comprises at least one second driving member, the second driving member being provided on the second movable support arm and being drivingly connected to the optical fiber probe to drive the optical fiber probe to rotate relative to the second movable support arm around an axis extending along the third direction;

[0021] The control terminal is electrically connected to the second driving member to control the working state of the second driving member.

[0022] Optionally, the first movable support arm and the second movable support arm are respectively made of titanium alloy material; and / or,

[0023] The single target structure is made of beryllium bronze material.

[0024] Optionally, each of the fiber Bragg gratings is encapsulated on its corresponding movable support arm using a polyimide coating; and / or,

[0025] Each of the optical fiber Bragg gratings is bonded to its corresponding movable support arm by using high-temperature resistant aviation glue.

[0026] Optionally, the optical fiber probe is made of sapphire.

[0027] In the technical solution of the present invention, the two fiber Bragg gratings on each cantilever beam are arranged in correspondence with each other, and the fiber Bragg grating can be used to monitor flow rate by adopting the differential pressure flow detection principle, that is, when the two fiber Bragg gratings on the cantilever beam have a drift in the center wavelength of the reflected wave due to a change in ambient temperature or a deformation of the target piece of the single target structure, the drift in the center wavelength of the reflected wave of the two fiber Bragg gratings can be processed by the external demodulation device to eliminate the influence of temperature or tension on flow detection, thereby enhancing the sensitivity of the fiber Bragg grating and achieving high-precision measurement of fluid flow. The holding rate monitoring of the horizontal well profile can be achieved by the fiber optic probe. Compared with the existing turbine flowmeter, it has better adaptability to dirty fluids and is not easy to get clogged in horizontal wells. In addition, the The first movable support arm and the second movable support arm can move closer to or farther from each other along the first direction. Thus, when the first movable support arm and the second movable support arm move closer to each other until the single target structure fits the support frame, the support frame is in a retracted state, reducing the volume of space occupied by the output profile flowmeter, greatly facilitating the lowering of the output profile flowmeter into the well, and preventing the output profile flowmeter from colliding with or getting stuck on the well wall of the horizontal well during the lowering process. When the output profile flowmeter moves to the target position in the horizontal well, the first movable support arm and the second movable support arm can move away from each other, and the support frame is in an extended state, facilitating monitoring by the first measurement component and the second measurement component. The output profile flowmeter provided by the present invention has a simple structure, high measurement accuracy, and high applicability, and can be applied to wellheads of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0029] Figure 1 A schematic structural diagram of an embodiment of the output profile flowmeter provided by the present invention at an angle (in an expanded state);

[0030] Figure 2 for Figure 1 Schematic diagram of the structure of the output profile flowmeter at another angle;

[0031] Figure 3 for Figure 1 Top view of the medium output profile flowmeter;

[0032] Figure 4 for Figure 1 Schematic diagram of part of the structure of the output profile flowmeter.

[0033] Description of Figure Numbers:

[0034]

[0035] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0037] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), such directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0039] With the continuous extraction of oil, the extraction of oil in these oil fields has entered the late stage of secondary oil recovery. Water injection into oil wells has led to the widespread presence of oil, gas, and water phases in the oil wells. Traditional logging instruments for vertical wells are less effective for horizontal wells and cannot accurately measure the flow rate of each phase of fluid in the well. In addition, most flow measurement equipment uses turbine flowmeters, which have high requirements for the purity of oil and gas downhole fluids. In environments with high sand content or high mineral content, sand is easily stuck, causing damage to the turbine or malfunctioning. At the same time, the conductivity and permittivity methods have a large failure range for measuring holdup, and cannot accurately measure gas holdup. In addition, due to the small wellhead of horizontal wells, high requirements are placed on the size of the downhole measurement equipment. Traditional electrical sensors are large in size and difficult to array as a whole.

[0040] In view of this, the present invention provides a production profile flowmeter 100 for horizontal well flow measurement. Figures 1 to 4 This is an embodiment of the production profile flowmeter 100 provided by the present invention.

[0041] See also Figures 1 to 4 The production profile flowmeter 100 includes a carrier 1, a first measurement component 2, a second measurement component 3, and a control terminal. The carrier 1 includes a first movable support arm 11 and a second movable support arm 12 arranged in sequence along a first direction. The first movable support arm 11 and the second movable support arm 12 can respectively rotate around an axis extending along a second direction, so that the first movable support arm 11 and the second movable support arm 12 can move closer to or farther away from each other along the first direction; the first measurement component 2 is used to measure the fluid flow in the horizontal well, and includes at least one single target structure 21 and at least two fiber gratings 22. The single target structure 21 includes a cantilever beam 211 and a target piece 212. The cantilever beam 211 is provided on the first movable support arm 11 and can move relative to the first movable support arm 1 1 rotates about an axis extending along a third direction. The cantilever beam 211 has two oppositely disposed side surfaces each provided with a fiber Bragg grating 22. The two fiber Bragg gratings 22 on the cantilever beam 211 are disposed correspondingly and are configured to be electrically connected to an external demodulation device. The target plate 212 is disposed on a side of the cantilever beam 211 away from the first movable support arm 11. The second measurement assembly 3 is configured to measure the fluid retention rate in the horizontal well and includes at least one fiber probe 31. The fiber probe 31 is rotatably disposed on the second movable support arm 12 and is disposed correspondingly to the target plate 212 of the single target structure 21. The control terminal is electrically connected to the fiber Bragg grating 22 and the fiber probe 31. The first direction, the second direction, and the third direction are disposed perpendicular to each other in a plane.

[0042] In the technical solution of the present invention, the two fiber Bragg gratings 22 on each cantilever beam 211 are arranged correspondingly, and the fiber Bragg gratings 22 can be used to monitor flow rate using the differential pressure flow detection principle, that is, when the two fiber Bragg gratings 22 on the cantilever beam 211 have a drift in the center wavelength of the reflected wave due to changes in ambient temperature or deformation of the target piece 212 of the single target structure 21, the drift in the center wavelength of the reflected wave of the two fiber Bragg gratings 22 can be processed by the external demodulation device to eliminate the influence of temperature or tension on flow detection, enhance the sensitivity of the fiber Bragg gratings 22, achieve high-precision measurement of fluid flow, and achieve retention rate monitoring of the horizontal well profile through the fiber probe 31. Compared with the existing turbine flowmeter, it has better adaptability to dirty fluids and is not easy to clog in horizontal wells. In addition, the first active The movable support arm 11 and the second movable support arm 12 can move closer to or farther from each other along the first direction. In this way, when the first movable support arm 11 and the second movable support arm 12 move closer to each other until the single target structure 21 fits the carrier 1, the carrier 1 is in a retracted state, reducing the volume of the space occupied by the output profile flowmeter 100, greatly facilitating the lowering of the output profile flowmeter 100, and avoiding the collision or blockage of the output profile flowmeter 100 with the well wall of the horizontal well during the lowering process. When the output profile flowmeter 100 moves to the target position in the horizontal well, the first movable support arm 11 and the second movable support arm 12 can move away from each other, and the carrier 1 is in an expanded state, facilitating the monitoring of the first measurement component 2 and the second measurement. The output profile flowmeter 100 provided by the present invention has a simple structure, high measurement accuracy, and high applicability, and can be applied to wellheads of different sizes.

[0043] It should be noted that, during the logging process, when the target piece 212 of the single target structure 21 is impacted by the liquid and gas in the well, the cantilever beam 211 will be deformed to a certain extent, so that the two fiber Bragg gratings 22 arranged on the cantilever beam 211 will also be deformed by force, thereby causing the center wavelengths of the reflected waves of the two fiber Bragg gratings 22 to drift, and the change in the center wavelength of the reflected waves of the fiber Bragg gratings 22 is linearly related to the tension on the cantilever beam 211; furthermore, the two fiber Bragg gratings 22 on each cantilever beam 211 are correspondingly arranged , it can be understood that the two fiber Bragg gratings 22 operate in the same ambient temperature. Thus, by selecting fiber Bragg gratings 22 with identical parameters, the center wavelength of the reflected wave of both will drift the same distance due to temperature. When the center wavelength of the reflected wave of the fiber Bragg grating 22 drifts due to the impact of fluid on the target plate 212, the differential structure of the two fiber Bragg gratings 22 ensures that they are affected by temperature in the same way, and are affected by the fluid impact force in the same magnitude but opposite directions. Using the demodulation device to demodulate the wavelength drift distance and perform differential processing, the corresponding fluid flow rate can be obtained. Simultaneously, the two fiber Bragg gratings 22 on each cantilever beam 211 will also experience center wavelength drift in the reflected wave due to changes in ambient temperature.

[0044] It should also be noted that, in the present invention, the optical fiber probe 31 is arranged corresponding to the target piece 212 of the single target structure 21, that is, the optical fiber probe 31 and the corresponding target piece 212 are in the same horizontal plane, that is, the optical fiber probe 31 and the corresponding target piece 212 are at the same height in the well, thereby realizing the flow rate and retention rate measurement of the fluid at this height, which has good applicability to the fluid stratification in the horizontal well.

[0045] It should also be noted that, in the present invention, the fiber optic probe 31 is rotatably mounted on the second movable support arm 12. Thus, during the logging process, the fiber optic probe 31 is driven to rotate so that the fiber optic probe 31 faces the upstream surface. Similarly, the cantilever arm can rotate relative to the first movable support arm 11, thereby driving the target plate 212 to rotate. Thus, during the logging process, the cantilever arm is driven to rotate so that the target plate 212 faces the upstream surface.

[0046] Furthermore, in the present invention, the number of the single target structure 21 , the fiber Bragg grating 22 , and the fiber probe 31 is not limited.

[0047] The first measurement component 2 includes a plurality of the single target structures 21 and a plurality of the fiber gratings 22, and the plurality of the single target structures 21 are distributed in sequence along the length direction of the first movable support arm 11; the second measurement component 3 includes a plurality of the fiber optic probes 31, and the plurality of the fiber optic probes 31 are distributed in sequence along the length of the second movable support arm 12, and are arranged in a one-to-one correspondence with the target pieces 212 of the plurality of the single target structures 21.

[0048] Thus, by providing multiple single-target structures 21, multiple fiber Bragg gratings 22, and multiple fiber probes 31, flow measurement at different heights of the output profile is achieved, while also achieving high accuracy in measuring three-phase flow in horizontal and steeply inclined pipelines. Furthermore, multiple target plates 212 are distributed throughout the entire pipeline cross-section, enabling detection of fluid flow at different heights in horizontal pipelines, reducing the impact of stratification due to gravity and enabling more accurate measurement of multiphase flow in horizontal pipelines.

[0049] For more details, see Figure 1 In one embodiment of the present invention, four single target structures 21 are provided, and correspondingly, eight fiber gratings 22 are provided, and four fiber probes 31 are provided.

[0050] For details, please refer to Figure 1 and Figure 4 The carrier frame 1 also includes a base 13 and a connecting arm 14 arranged at intervals along the third direction. The base 13 and the connecting arm 14 are respectively extended along the first direction and are rotatably connected to the first movable support arm 11 and the second movable support arm 12. The length of the connecting arm 14 is smaller than the length of the base 13; the base 13 is used to fit with the bottom of the horizontal well, and the connecting arm 14 is used to fit with the casing in the horizontal well.

[0051] Thus, when the angle between the movable support arm and the base 13 is greater than 0°, the support frame 1 is arranged in a trapezoidal shape, and its upper end, namely the connecting arm 14, fits against the casing in the horizontal well, ensuring the centering and stability of the production profile flowmeter 100. During the downhole process, the bottom end of the support frame 1, namely the base 13, contacts the bottom of the horizontal well and is driven to the target position by the coiled tubing.

[0052] Furthermore, in the present invention, the connection method between each movable support arm and the base 13 and the connecting arm 14 is not limited.

[0053] For details, please refer to Figure 1In one embodiment of the present invention, the first movable support arm 11 and the second movable support arm 12 respectively include two movable support rods 1a spaced apart along the second direction, and a first connecting rod 1b and a second connecting rod 1c spaced apart along the length direction of the movable support arm. The first connecting rod 1b and the second connecting rod 1C are arranged between the two movable support rods 1a and are rotatably connected to the two movable support rods 1a; one of the first connecting rod 1b and the second connecting rod 1C is slidably connected to the base 13, and the other is slidably connected to the connecting arm 14, so that the first movable support arm 11 and the second movable support arm 12 can approach or move away from each other along the first direction.

[0054] In this way, by driving the first connecting rod 1b and the second connecting rod 1c to slide along the first direction, the first movable support arm 11 and the second movable support arm 12 can be moved closer to or away from each other along the first direction, so that the support frame 1 is in a folded state or an unfolded state, so as to facilitate the lowering of the production profile flowmeter 100 into the well and monitoring in the horizontal well.

[0055] It should be noted that the rotatable connection mode of the first connecting rod 1b and the second connecting rod 1c with the base 13 and the connecting arm 14 is not limited and can be hinged, sleeved, etc.

[0056] Furthermore, a first sliding groove and a first protrusion that are adapted for sliding connection are provided between the first connecting rod 1b and the base 13. One of the first sliding groove and the first protrusion is provided on the first connecting rod 1b, and the other is provided on the base 13, so that the first connecting rod 1b is slidably connected to the base 13.

[0057] Specifically, a second sliding groove and a second protrusion that are adapted for sliding connection are provided between the second connecting rod 1C and the connecting arm 14. One of the second sliding groove and the second protrusion is provided on the second connecting rod 1C, and the other is provided on the connecting arm 14, so that the first connecting rod 1b is slidably connected to the base 13.

[0058] It should be noted that, in the present invention, the above two technical features can be provided at the same time, or one of them can be provided selectively. Specifically, in one embodiment of the present invention, the above two technical features are provided at the same time, that is, a first sliding groove and a first protrusion adapted for sliding connection are provided between the first connecting rod 1b and the base 13, one of the first sliding groove and the first protrusion is provided on the first connecting rod 1b, and the other is provided on the base 13, so that the first connecting rod 1b is slidably connected to the base 13, and a second sliding groove and a second protrusion adapted for sliding connection are provided between the second connecting rod 1C and the connecting arm 14, one of the second sliding groove and the second protrusion is provided on the second connecting rod 1C, and the other is provided on the connecting arm 14, so that the first connecting rod 1b is slidably connected to the base 13.

[0059] Of course, in another embodiment of the present invention, the base 13 includes a first movable part and a second movable part both extending along the first direction, the first movable part can be sleeved outside the second movable part, and the first movable part and the second movable part are slidably connected so that the second movable part can slide inside and outside the first movable part; the connecting arm 14 includes a third movable part and a fourth movable part respectively extending along the first direction, the third movable part can be sleeved outside the fourth movable part, and the third movable part and the fourth movable part are slidably connected so that the fourth movable part can slide inside and outside the third movable part; the first movable support arm 11 is rotatably connected to the first movable part and the third movable part, and the second movable support arm 12 is rotatably connected to the second movable part and the fourth movable part.

[0060] For details, please refer to Figure 1 and Figure 2 The first measurement assembly 2 further includes at least one first driving member 23, which is disposed on the first movable support arm 11 and is drivingly connected to the cantilever beam 211 to drive the cantilever beam 211 to rotate relative to the first movable support arm 11 about an axis extending in the third direction. The control terminal is electrically connected to the first driving member 23 to control the operating state of the first driving member 23. Thus, the first driving member 23 drives the cantilever beam 211 to rotate, thereby driving the target plate 212 to rotate, thereby ensuring that the target plate 212 is positioned directly facing the frontal surface.

[0061] It should be noted that, in the present invention, the configuration of the first driving member 23 is not limited, and it can be a motor, or a cylinder, etc.

[0062] For details, please refer to Figure 1The second measurement assembly 3 further includes at least one second driving member 32, which is disposed on the second movable support arm 12 and is drivingly connected to the fiber optic probe 31 to drive the fiber optic probe 31 to rotate relative to the second movable support arm 12 about an axis extending along the third direction. The control terminal is electrically connected to the second driving member 32 to control the operating state of the second driving member 32. Thus, the fiber optic probe 31 is driven to rotate by the second driving member 32, ensuring that the fiber optic probe 31 is positioned directly facing the flow surface.

[0063] It should be noted that, in the present invention, the configuration of the first driving member 23 is not limited, and it can be a motor, or a cylinder, etc.

[0064] Specifically, the first movable support arm 11 and the second movable support arm 12 are respectively made of titanium alloy material, so that the first movable support arm 11 and the second movable support arm 12 have good temperature and pressure resistance characteristics.

[0065] Specifically, the single target structure 21 is made of beryllium bronze material, so that the single target structure 21 has good temperature resistance and elasticity.

[0066] It should be noted that, in the present invention, the above two technical features may be provided selectively or simultaneously. Specifically, in one embodiment of the present invention, the above two technical features are provided simultaneously, namely, the first movable support arm 11 and the second movable support arm 12 are respectively made of titanium alloy material, and the single target structure 21 is made of beryllium bronze material, thereby improving the practicality of the output profile flowmeter 100.

[0067] Specifically, each of the fiber Bragg gratings 22 is encapsulated on its corresponding movable support arm with a polyimide coating, so that the fiber Bragg grating 22 has good temperature resistance.

[0068] Specifically, each of the optical fiber Bragg gratings 22 is bonded to its corresponding movable support arm by using high-temperature resistant aviation glue, which has a good packaging and protection effect.

[0069] It should be noted that, in the present invention, the above two technical features may be provided selectively or simultaneously. Specifically, in one embodiment of the present invention, the above two technical features are provided simultaneously, namely, each fiber Bragg grating 22 is encapsulated on its corresponding movable support arm using a polyimide coating, and each fiber Bragg grating 22 is bonded to its corresponding movable support arm using high-temperature resistant aviation glue, thereby improving the practicality of the output profile flowmeter 100.

[0070] More specifically, in one embodiment of the present invention, the high temperature resistant aviation glue is 353ND high temperature resistant aviation glue.

[0071] Specifically, in one embodiment of the present invention, the fiber Bragg grating 22 is a high-temperature resistant fiber Bragg grating 22 , which has strong adaptability to high-temperature and high-pressure environments.

[0072] Specifically, in one embodiment of the present invention, the optical fiber probe is made of sapphire, which has a very high hardness and can effectively improve the ability of the optical fiber probe to puncture bubbles.

[0073] Specifically, in one embodiment of the present invention, the target plate 212 and the cantilever beam 211 are manufactured using an integrated processing technology, which can effectively reduce the movable parts in the output profile flowmeter 100, improve the stability of the output profile flowmeter 100, and further improve the accuracy of flow detection.

[0074] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A production profile flowmeter for horizontal well flow measurement, characterized in that: The output profile flow meter comprises: The carrier comprises a first movable support arm and a second movable support arm sequentially arranged along a first direction, wherein the first movable support arm and the second movable support arm are respectively rotatable around an axis extending along a second direction, so that the first movable support arm and the second movable support arm can move closer to or farther away from each other along the first direction; a first measurement assembly for measuring the fluid flow rate in the horizontal well, comprising at least one single target structure and at least two fiber Bragg gratings (FBGs); the single target structure comprising a cantilever beam and a target plate; the cantilever beam being disposed on the first movable support arm and being rotatable relative to the first movable support arm about an axis extending in a third direction; a fiber Bragg grating being disposed on each of two opposing side surfaces of the cantilever beam; the two fiber Bragg gratings on the cantilever beam being disposed in correspondence with each other and being configured to be electrically connected to an external demodulation device; and the target plate being disposed on a side of the cantilever beam away from the first movable support arm; a second measuring assembly for measuring the fluid retention in the horizontal well, comprising at least one optical fiber probe, the optical fiber probe being rotatably disposed on the second movable support arm and being disposed corresponding to the target piece of the single target structure; and a control terminal electrically connected to the fiber grating and the fiber probe; The first direction, the second direction and the third direction are arranged perpendicular to each other in a plane.

2. The output profile flow meter according to claim 1, wherein: The first measurement assembly includes a plurality of the single target structures and a plurality of the fiber Bragg gratings, and the plurality of the single target structures are sequentially spaced along the length direction of the first movable support arm; The second measurement component includes a plurality of the optical fiber probes, which are sequentially spaced along the length of the second movable support arm and are arranged in one-to-one correspondence with the target pieces of the single target structure.

3. The output profile flow meter according to claim 1 or 2, characterized in that: The carrier further includes a base and a connecting arm spaced apart along the third direction, the base and the connecting arm respectively extending along the first direction and both rotatably connected to the first movable support arm and the second movable support arm, and the length of the connecting arm is shorter than the length of the base; The base is used to fit with the bottom of the horizontal well, and the connecting arm is used to fit with the casing in the horizontal well.

4. The output profile flow meter according to claim 3, wherein: The first movable support arm and the second movable support arm respectively include two movable support rods spaced apart along the second direction, and a first connecting rod and a second connecting rod spaced apart along the length direction of the movable support arm, the first connecting rod and the second connecting rod are arranged between the two movable support rods and are rotatably connected to the two movable support rods; One of the first connecting rod and the second connecting rod is slidably connected to the base, and the other is slidably connected to the connecting arm, so that the first movable supporting arm and the second movable supporting arm can move closer to or farther away from each other along the first direction.

5. The output profile flow meter according to claim 4, wherein: A first sliding groove and a first protrusion adapted for sliding connection are provided between the first connecting rod and the base, one of the first sliding groove and the first protrusion being provided on the first connecting rod and the other being provided on the base, so that the first connecting rod is slidably connected to the base; and / or, A second sliding groove and a second protrusion that are adapted for sliding connection are provided between the second connecting rod and the connecting arm. One of the second sliding groove and the second protrusion is provided on the second connecting rod, and the other is provided on the connecting arm, so that the first connecting rod is slidably connected to the base.

6. The production profile flow meter according to claim 1, wherein: The first measuring assembly further includes at least one first driving member, the first driving member being provided on the first movable support arm and drivingly connected to the cantilever beam to drive the cantilever beam to rotate relative to the first movable support arm around an axis extending along the third direction; The control terminal is electrically connected to the first driving member to control the working state of the first driving member.

7. The production profile flow meter according to claim 1, wherein: The second measuring assembly further includes at least one second driving member, the second driving member being disposed on the second movable support arm and drivingly connected to the optical fiber probe to drive the optical fiber probe to rotate relative to the second movable support arm around an axis extending along a third direction; The control terminal is electrically connected to the second driving member to control the working state of the second driving member.

8. The production profile flow meter according to claim 1, wherein: The first movable support arm and the second movable support arm are respectively made of titanium alloy material; and / or, The single target structure is made of beryllium bronze material.

9. The production profile flow meter according to claim 1, wherein: Each of the optical fiber Bragg gratings is encapsulated on its corresponding movable support arm using a polyimide coating; and / or, Each of the optical fiber Bragg gratings is bonded to its corresponding movable support arm by using high-temperature resistant aviation glue.

10. The production profile flow meter according to claim 1, wherein: The optical fiber probe is made of sapphire.

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