Device and method for counting and detecting filler in polymer injection fracturing system

Abstract

The invention discloses a device and method for counting and detecting filler in a polymer injection fracturing system, and the device comprises a distance measurement assembly which is used for detecting the distance data of a piston pushing the filler to move in a filling pipe; and the upper computer is connected with the distance measuring assembly and is used for determining the filling quantity of the filling material filled into the polymer injection fracturing pipe according to the distance data and the diameter size of the single filling material. In order to count the quantity of the filling materials filled into the polymer injection fracturing pipe, distance data capable of detecting the movement of the filling materials downwards pushed by the piston along the filling pipe is set; therefore, the upper computer can finally determine the filling quantity of the filling material filled into the polymer injection fracturing pipe according to the diameter size of the single filling material and the moving distance data of the piston, and the problem of leakage of the filling material caused by inaccurate statistics of the filling quantity of the filling material is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of polymer injection for oil and gas field exploitation, and in particular to a device and method for detecting counting of injected materials in a polymer injection fracturing system. Background Art

[0002] During the polymer injection process of oil and gas field exploitation, temporary plugging balls need to be added to the polymer injection fracturing pipe through a high-pressure closed steel filling pipe, so as to temporarily plug the blastholes corresponding to different pressure oil layers in the well; and the temporary plugging balls of different pressure layers can be discharged from the pipeline with the crude oil; in order to ensure that the temporary plugging balls are completely discharged from the pipeline, it is necessary to accurately count the temporary plugging balls added to the polymer injection fracturing pipe to ensure that the number of temporary plugging balls added and discharged is the same, so as to avoid the leakage of temporary plugging balls and affect subsequent work. However, the filling pipe is a closed and invisible pipeline structure, and it is impossible to directly visually count the temporary plugging balls, and the size of the temporary plugging balls is not fixed, which makes it more difficult to accurately count the data of the added temporary plugging balls. Summary of the invention

[0003] The purpose of the present invention is to provide a device and method for counting and detecting injection materials in a polymer injection fracturing system, which can simply and accurately realize accurate counting of injection materials in the polymer injection fracturing system and provide reliable data basis for avoiding leakage of injection materials.

[0004] In order to solve the above technical problems, the present invention provides a counting and detecting device for filling materials in a polymer injection fracturing system, comprising:

[0005] A distance measuring component, used for detecting the distance data of the piston pushing the filling material in the filling pipe;

[0006] The host computer connected to the distance measuring component is used to determine the injection quantity of the injection material into the polymer injection fracturing pipe according to the distance data and the diameter size of a single injection material.

[0007] In an optional embodiment of the present application, the distance measuring assembly includes a magnet structure arranged on the piston and a magnetic field sensor arranged on the outer side wall of the filling pipe and communicatively connected to the host computer;

[0008] The magnetic field sensor is used to sense and detect magnetic field data of the magnetic structure when the magnetic structure moves with the piston in the filling pipe;

[0009] The host computer determines the distance data according to the magnetic field data, and determines the filling quantity of the filling object according to the distance data.

[0010] In an optional embodiment of the present application, the distance measuring assembly includes a plate-shaped support arranged on the outer side wall of the filling pipe; the magnetic field sensor includes a plurality of magnetic field sensors extending and distributed along the length direction of the filling pipe on the plate-shaped support, and each of the magnetic field sensors is distributed at equal intervals;

[0011] As the piston moves in the filling pipe, at least one of the magnetic field sensors can sense and detect the magnetic field generated by the magnet structure at the same time point.

[0012] In an optional embodiment of the present application, the host computer is used to measure the magnetic field data respectively from the two magnetic field sensors with the largest magnetic field data currently collected by each of the magnetic field sensors, combined with the moving distance formula , determine the moving distance of the piston, perform a ratio operation on the moving distance and the diameter size, and obtain the filling quantity; wherein, is the distance data, is the distance between two adjacent magnetic field sensors, , , To set the distance between the magnet structure and The number of magnetic field intensity intervals divided by the magnetic field intensity within the range, is the distance between the magnetic field sensor and the piston The magnetic field intensity interval to which the magnetic field data measured by the magnetic field sensor belongs when the magnetic field data is within the range; and , N is the total number of magnetic field sensors, , Respectively and The magnetic field data currently measured by the magnetic field sensor, and the and The magnetic field data currently measured by the magnetic field sensors is the largest.

[0013] In an optional embodiment of the present application, each of the magnetic field sensors is configured to send the magnetic field data to the host computer when the measured magnetic field data is greater than a first preset magnetic field threshold.

[0014] In an optional embodiment of the present application, an indicator light is provided corresponding to the location of each magnetic field sensor; when the magnetic field data measured by the magnetic field sensor is greater than or equal to a second preset magnetic field threshold, the indicator light corresponding to the magnetic field sensor lights up to identify the position of the piston.

[0015] In an optional embodiment of the present application, the piston includes a columnar body, a sealing ring disposed at one end of the columnar body; a threaded structure disposed at the other end of the columnar body, and a nut disposed in cooperation with the thread; wherein the outer diameter of the sealing ring is the same as the inner diameter of the filling pipe;

[0016] Wherein, the magnet structure is an annular magnet, which is sleeved on the columnar body and located between the sealing ring and the nut.

[0017] A method for detecting the counting of injection materials in a polymer injection fracturing system, applied to the device for detecting the counting of injection materials in a polymer injection fracturing system as described in any one of the above items, the method comprising:

[0018] Obtaining data of the distance moved by the distance measuring component detecting piston in the filling pipe to push the filling material;

[0019] The injection quantity of the injector to be injected into the polymer injection fracturing pipe is determined according to the distance data and the diameter size of a single injector.

[0020] In an optional embodiment of the present application, the distance measuring assembly includes a magnet structure arranged on the piston and a magnetic field sensor arranged on the side wall of the filling pipe and communicatively connected to the host computer;

[0021] Obtaining distance data of the distance measurement component detecting piston pushing the filling material in the filling pipe, including:

[0022] When the magnetic structure and the piston move in the filling pipe, receiving magnetic field data of the magnetic structure sensed by the magnetic field sensor;

[0023] The distance data is determined based on the magnetic field data.

[0024] In an optional embodiment of the present application, the magnetic field sensor includes a plurality of magnetic field sensors extending and distributed along the length direction of the filling pipe on the plate-shaped support, and each of the magnetic field sensors is distributed at equal intervals; as the piston moves in the filling pipe, at the same time point, at least one of the magnetic field sensors can sense and detect the magnetic field generated by the magnetic structure;

[0025] Determining the distance data according to the magnetic field data includes:

[0026] According to the magnetic field data measured by the two magnetic field sensors with the largest magnetic field data currently collected by each of the magnetic field sensors, combined with the moving distance formula , determine the moving distance of the piston, perform a ratio operation on the moving distance and the diameter size, and obtain the filling quantity; wherein, , , To set the distance between the magnet structure and The number of magnetic field intensity intervals divided by the magnetic field intensity within the range, is the distance between the magnetic field sensor and the piston The magnetic field intensity interval to which the magnetic field data measured by the magnetic field sensor belongs when the magnetic field data is within the range; and , N is the total number of magnetic field sensors, , They are the magnetic field data currently measured by the j-th and j+1-th magnetic field sensors respectively, and the magnetic field data currently measured by the j-th and j+1-th magnetic field sensors are the largest.

[0027] The present invention provides a device for counting and detecting fillers in a polymer injection fracturing system and a method for counting and detecting fillers in a polymer injection fracturing system. The device for counting and detecting fillers in a polymer injection fracturing system comprises: a distance measuring component for detecting distance data of a piston pushing a filler to move in a filler pipe; and a host computer connected to the distance measuring component for determining the amount of filler injected into the polymer injection fracturing pipe according to the distance data and the diameter size of a single filler.

[0028] In order to count the amount of refills added to the polymer-injected fracturing tube in the present application, a device is provided to detect the distance data of the piston pushing the refills along the filling tube. Thus, the upper computer can finally determine the amount of refills added to the polymer-injected fracturing tube according to the diameter size of a single refill and the distance data of the piston movement, thereby avoiding the problem of refill leakage caused by inaccurate statistics of the refilled amount.

[0029] In an optional embodiment of the present application, the distance measuring component includes a magnet structure arranged on the piston and a magnetic field sensor arranged on the outer wall of the filling pipe. The magnetic field generated by the magnet structure has strong penetrability and is sensed and detected by the magnetic field sensor outside the filling pipe. Therefore, based on the magnetic field data of the magnet structure detected by the magnetic field sensor, the distance data of the piston moving in the filling pipe can be indirectly determined, thereby avoiding interference of the filling pipe itself and the high-pressure liquid inside it with the detection of the piston movement distance, thereby ensuring the accuracy and reliability of the measured piston movement distance, and also ensuring the accuracy of the filling quantity of the refill. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] FIG1 is a schematic structural diagram of a device for counting and detecting injection materials in a polymer injection fracturing system according to an embodiment of the present application;

[0032] FIG2 is a schematic diagram of the cross-sectional structure of a filling pipe provided in an embodiment of the present application;

[0033] FIG3 is a schematic diagram of a structure in which a magnetic field sensor is provided on the outer side wall of a filling pipe according to an embodiment of the present application;

[0034] FIG4 is a schematic diagram of the structure of a filling pipe provided in an embodiment of the present application;

[0035] FIG5 is a coordinate diagram of the magnetic field intensity distribution of the magnet structure provided in an embodiment of the present application;

[0036] FIG6 is a schematic diagram of the explosion structure of a piston provided in an embodiment of the present application;

[0037] FIG. 7 is a schematic flow chart of a method for detecting injection count in a polymer injection fracturing system according to an embodiment of the present application. DETAILED DESCRIPTION

[0038] As shown in FIG. 1 and FIG. 2 , in the polymer injection fracturing system, the filler 8 (also called temporary plugging ball) is filled into the polymer injection fracturing pipe 2 through the filling pipe 1. The polymer injection fracturing pipe is generally placed horizontally and a filling opening for accommodating the filling of the filler 8 is provided on the polymer injection fracturing pipe 2. For example, the filling pipe 1 is arranged vertically, the bottom end of the filling pipe 1 is connected to the filling opening of the polymer injection fracturing pipe 2 and the top end is connected to the hydraulic device 6. A piston 3 is provided inside the filling pipe 1, and a plurality of fillers 8 are arranged in sequence along the vertical direction below the piston 3. Therefore, when the hydraulic equipment 6 is filled with high-pressure liquid from the top of the filling pipe 1, the piston 3 can be pushed to move along the filling pipe 1, thereby pushing each filling object to move synchronously. When each filling object 8 moves to the filling opening of the injection and fracturing pipe 2, the filling object 8 can be filled into the injection and fracturing pipe 2; similarly, the filling pipe 1 may also be horizontally set or inclined, etc. At this time, high-pressure liquid is also injected from the filling pipe 1, thereby pushing the piston 3 to push the filling object to move to the other end of the filling pipe 1 until it is injected into the injection and fracturing pipe 2.

[0039] Because the filling pipe 1 needs to withstand the pressure of the high-pressure liquid filled into it by the hydraulic equipment, the filling pipe 1 generally adopts a steel pipe whose interior is not directly visible, which makes it impossible to count the amount of filling material 8 in the filling pipe 1 by directly observing from the outside of the filling pipe; thereby increasing the difficulty of counting the amount of filling material 8.

[0040] The present application provides a counting and detection device and method for filling materials in a polymer injection fracturing system, which can achieve accurate counting of the number of filling materials, thereby effectively avoiding the problem of leakage of filling materials.

[0041] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0042] As shown in Figures 1 to 4, Figure 1 is a structural schematic diagram of a filling material counting and detection device in an injection polymer fracturing system provided in an embodiment of the present application; Figure 2 is a cross-sectional structural schematic diagram of a filling pipe provided in an embodiment of the present application; Figure 3 is a structural schematic diagram of a magnetic field sensor provided on the outer wall of a filling pipe provided in an embodiment of the present application; Figure 4 is a structural schematic diagram of a filling pipe provided in an embodiment of the present application.

[0043] In a specific embodiment of the present application, the injection material counting detection device in the polymer injection fracturing system may include:

[0044] The distance measuring component is used to detect the distance data of the piston 1 pushing the filling material 8 in the filling pipe 1;

[0045] The host computer 5 connected to the distance measuring component is used to determine the injection quantity of the injection material 8 into the polymer injection fracturing pipe 2 according to the distance data and the diameter size of a single injection material 8.

[0046] The present embodiment takes into account that although the filler 8 in the filling pipe 1 moves downward due to the thrust and the amount of filler 8 filled into the polymer injection fracturing pipe 2 cannot be directly visualized, it can be seen from FIGS. 1 and 2 that when the filler 8 is arranged in the filling pipe 1, the piston 3 can push the filler 8 farthest from the piston 3 to be filled into the polymer injection fracturing pipe 2 every time it pushes the filler 8 to move a distance equal to the diameter of the filler 8. That is to say, there is a correlation between the moving distance of the piston 3 and the filling amount of the filler 8. Therefore, the present embodiment takes this as a basis, and detects the moving distance of the piston 3 in the filling pipe 1, thereby indirectly determining the filling amount of the filler 8 filled into the polymer injection fracturing pipe 2.

[0047] On this basis, the distance measuring component for measuring the moving distance of the piston 3 in the filling pipe 1 in this embodiment can include a variety of methods, for example, an acceleration sensor can be set on the piston 3, and the displacement of the piston 3 can be determined by measuring the acceleration data of the piston in real time, or a hydraulic gauge can be considered to be set on the piston 3, and the hydraulic depth above the piston can be determined by the hydraulic data collected by the hydraulic gauge, etc.

[0048] As shown in FIG. 2 and FIG. 3 , in an optional embodiment of the present application, the distance measuring component may include:

[0049] A magnet structure 7 disposed on the piston 3 and a magnetic field sensor 41 disposed on the outer wall of the filling pipe 1 and communicatively connected to the host computer 5;

[0050] The magnetic field sensor 41 is used to sense and detect the magnetic field data of the magnetic structure 7 when the magnetic structure 7 moves with the piston in the filling pipe 1;

[0051] The host computer 5 determines the distance data according to the magnetic field data, and determines the filling quantity of the filling object 8 according to the distance data.

[0052] In this embodiment, the magnetic structure 7 arranged on the piston 3 and the magnetic field sensor 41 arranged outside the filling pipe 1 cooperate with each other to measure the moving position of the piston 3 in the filling pipe 1, and thereby determine the distance data of the movement of the piston 3. Compared with devices such as accelerometers that are only arranged on the piston 3 in the filling pipe 1, the magnetic field sensor 41 in this embodiment is arranged on the outer wall of the filling pipe 1, so that the magnetic field sensor 41 and the host computer 5 can be connected by wired communication through a communication cable, or by wireless communication through a wireless communication module. In short, there is no need to pass through the steel filling pipe 1 and the high-pressure liquid in the filling pipe 1 to achieve communication connection, so that the communication difficulty between the magnetic field sensors 41 is lower, the communication is more stable, and the data transmitted by the magnetic field sensor 41 is ensured to be more accurate and reliable; on this basis, when the magnetic field sensor 41 senses and detects the magnetic field generated by the magnetic structure 7, the magnetic field generated by the magnetic structure 7 has sufficient strength to exceed the influence of the filling pipe 1 and the high-pressure liquid therein, so as to ensure that the magnetic field data detected by the magnetic field sensor 41 has significant and easy-to-identify features.

[0053] It is understandable that, because the magnetic structure 7 is disposed on the piston 3, the magnetic field generated by the magnetic structure 7 will inevitably move and change in space as the piston 3 moves, and this movement change can be detected and determined by the magnetic field data measured by the magnetic field sensor 41. And based on the different ways in which the magnetic field sensor 41 is disposed on the outer wall of the filling pipe 1, the ways and principles for determining the moving distance of the piston 3 based on the magnetic field data are also different.

[0054] In an optional implementation of this embodiment, the magnetic field sensor 41 may be able to move along the outer side wall of the filling pipe 1 .

[0055] It should be noted that, when the piston 3 pushes the filling material 8 for filling, it does not fill all the filling material 8 into the injection and polymer fracturing pipe 2 at one time, but occasionally stops in the middle. For this reason, as shown in FIG3 , the magnetic field sensor 41 can be connected with a driving component. When the piston 3 pauses in movement, the driving component drives the magnetic field sensor 41 to move along the outer wall of the filling pipe. When the magnetic field data measured by the magnetic field sensor 41 is the largest, it can be determined that the magnetic field sensor 41 and the piston 3 are at the same height position. The current position of the magnetic field sensor 41 also represents the current position of the piston 3. Therefore, the downward movement distance of the piston 3 is determined by combining the current position of the magnetic field sensor 41 and the initial position of the piston 3 (which can also be measured by the magnetic field sensor 41).

[0056] As shown in FIG. 2 , in another optional implementation of the present embodiment, the distance measuring assembly may include a plate-shaped support 4 disposed on the outer side wall of the filling pipe 1; the magnetic field sensor 41 includes a plurality of magnetic field sensors 41 extending and distributed along the length direction of the filling pipe 1 on the plate-shaped support 4, and each magnetic field sensor 41 is distributed at equal intervals;

[0057] As the piston 3 moves in the filling pipe 1 , at least one of the magnetic field sensors 41 can sense and detect the magnetic field generated by the magnetic structure 7 at the same time point.

[0058] As shown in FIG. 4 , in this embodiment, a plate-shaped support 4 can be fixed on the outer wall of the filling pipe 1 by a saddle buckle 11. The plate-shaped support 4 can be a strip plate with a length substantially the same as that of the filling pipe 1. Thus, a plurality of magnetic field sensors 41 can be sequentially arranged on the plate-shaped support 4 along the length direction of the filling pipe 1, and each magnetic field sensor 41 is arranged at equal intervals. Thus, when the piston 3 moves in the filling pipe 1 in the vertical direction, when the piston 3 moves through the position of one of the magnetic field sensors 41, the magnetic field data sensed and detected by the magnetic field sensor 41 increases, and when the piston 3 is farther away from a magnetic field sensor 41, the magnetic field data measured by the magnetic field sensor 41 gradually decreases to 0. Thus, based on the size distribution of the magnetic field data respectively measured by the magnetic field sensors 41 sequentially arranged in the vertical direction, the position of the piston 3 relative to each magnetic field sensor 41 can be determined, and the position of the piston 3 in the filling pipe 1 can be indirectly determined, and then the distance data of the downward movement of the piston 3 is determined, thereby determining the filling amount of the filling material 8.

[0059] On this basis, in order to avoid the situation where the magnetic field data collected by the two magnetic field sensors 41 closest to the piston 3 are all 0 due to insufficient magnetic field strength of the magnetic structure 7, that is, both magnetic field sensors 41 cannot sense and detect the magnetic field generated by the magnetic structure 7, which will affect the detection of the position of the piston 3 to a certain extent. For this reason, in actual applications, the spacing between the magnetic field sensors 41 should be arranged based on the size of the magnetic field that the magnetic structure 7 can generate, to ensure that even when the piston 3 and the magnetic structure 7 are located at the midpoint between the two magnetic field sensors 41, the two magnetic field sensors 41 closest to the piston 3 can sense and detect the magnetic field generated by the magnetic structure 7. Therefore, as the piston 3 moves in the filling pipe 1, there must be at least one magnetic field sensor 42 that can sense and detect the magnetic field of the magnetic structure 7 at the same time, thereby ensuring that the piston 3 can always be detected no matter where it moves to.

[0060] In addition, in order to ensure the reliability of magnetic field data detection, each magnetic field sensor 41 needs to upload the magnetic field data detected by it to the host computer 5 in real time, so as to ensure that the host computer 5 can accurately determine the position of the piston 3 corresponding to each sampling time point according to the magnetic field data collected by each magnetic field sensor 41. However, if the total number of magnetic field sensors 41 is large, each magnetic field sensor 41 transmits data to the host computer 5 at a high frequency, which may cause channel blocking. For this reason, in practical applications, for each magnetic field sensor 41, it can only start to send magnetic field data to the host computer 5 when the magnetic field data sensed by it is greater than a first preset magnetic field threshold value slightly greater than 0, thereby avoiding the problem that the magnetic field sensor 41 at a long distance sends useless magnetic field data to the host computer 5, resulting in the channel of the host computer 5 being busy.

[0061] On this basis, when the host computer 5 determines the filling quantity of the filling object 8 according to the magnetic field data collected by each magnetic field sensor 41, it can specifically include:

[0062] The host computer 5 is used to combine the moving distance formula with the magnetic field data currently collected by each magnetic field sensor 41 and the magnetic field data respectively measured by the two magnetic field sensors 41 with the largest magnetic field data. , determine the moving distance of the piston 3, perform a ratio operation on the moving distance and the diameter size, and obtain the filling quantity; wherein, is the distance between two adjacent magnetic field sensors 41, , , To increase the distance from the magnet structure to 7 The number of magnetic field intensity intervals divided by the magnetic field intensity within the range, is the distance between the magnetic field sensor 41 and the piston 3 When within the range, the magnetic field intensity interval to which the magnetic field data measured by the magnetic field sensor 41 belongs; and , N is the total number of magnetic field sensors 41, , Respectively and The magnetic field data currently measured by the magnetic field sensor 41, and the and The magnetic field data currently measured by the magnetic field sensor 41 is the largest.

[0063] Based on the magnetic field characteristics generated by the magnetic structure 7, it can be known that within the peripheral range of the magnetic structure 7, the farther the distance from the magnetic structure 7, the smaller the magnetic field strength, and the closer the distance to the magnetic structure 7, the greater the magnetic field strength; for this reason, in this embodiment, the magnetic structure 7 is taken as the center, and according to the magnitude of the magnetic field strength generated by the magnetic structure, the magnetic structure 7 is separated from the magnetic structure 7 by a distance of The magnetic field strength of the range is divided into 2n magnetic field strength intervals, and the spatial distance range corresponding to each magnetic field strength interval is , that is, the magnetic field generated by the magnetic structure 7 is Within the spatial distance range, the corresponding magnetic field intensity interval is .

[0064] As shown in FIG4 , with the magnet structure 7 as the center, the vertical distance is The space within the range is divided into 2n magnetic field strength intervals, and the magnetic field strength ranges corresponding to the two magnetic field strength intervals symmetrical about the magnetic structure 7 are the same, that is, 2n magnetic field strength intervals correspond to n different magnetic field strength ranges.

[0065] In the embodiment shown in FIG. 4 , the magnetic field space around the magnetic structure 7 is divided into 8 magnetic field intervals with the vertical position as the horizontal coordinate and the magnetic field strength as the vertical coordinate. In the magnetic field space between, the magnetic field strength corresponds to , and the distance from the magnet structure is To 2 In the magnetic field space between, the magnetic field strength corresponds to , and the distance from the magnet structure is 2 To 3 In the magnetic field space between, the magnetic field strength corresponds to , and the distance from the magnet structure is 3 to 4 In the magnetic field space between, the magnetic field strength corresponds to ,in, , , Obviously, as the piston moves, the magnetic field data sensed and detected by the two adjacent magnetic field sensors closest to the piston will inevitably fall within the above four magnetic field intensity intervals.

[0066] Thus, as the piston moves, the piston moves to the and When the position between the magnetic field sensors is reached, it means that the piston has moved past A magnetic field sensor, and if at this time Magnetic field data measured by magnetic field sensors is greater than Magnetic field data measured by magnetic field sensors , it means that the piston is closer to the jth magnetic field sensor. At this time, when , then it means The distance between the magnetic field sensor and the piston is The current downward distance of the piston is ; and when Magnetic field data measured by magnetic field sensors is less than Magnetic field data measured by magnetic field sensors , it means that the piston is The magnetic field sensor is closer, and at this time, when , then it means The distance between the magnetic field sensor and the piston is range, and the piston has not yet reached The location of the magnetic field sensor; therefore, the current downward distance data of the piston is .

[0067] Of course, in actual applications, there may be a magnetic field sensor with the largest magnetic field data, and the magnetic field data measured by the two magnetic field sensors closest to the magnetic field sensor are equal, then it can be directly determined that the position of the piston is the position of the magnetic field sensor with the largest magnetic field data. In addition, it is also possible that the magnetic field data measured by two adjacent magnetic field sensors are equal, which means that the piston is exactly at the midpoint of the two adjacent magnetic field sensors, and at this time, the distance data of the current movement of the piston can also be directly determined.

[0068] It can be understood that the above-mentioned division method of the magnetic field space around the piston is not limited to the 8 intervals shown in Figure 4. Specifically, the number of divided magnetic field intervals can be set based on the diameter size of a single filling object. When the diameter size of a single filling object is smaller relative to the distance between two adjacent magnetic field sensors, the number of divided magnetic field intervals should be greater; conversely, when the diameter size of a single filling object is larger relative to the distance between two adjacent magnetic field sensors, the number of divided magnetic field intervals should be smaller.

[0069] In an optional embodiment, if the diameter of a single filling material is exactly equal to the spacing between two adjacent magnetic field sensors, there is no need to divide the magnetic field space around the magnetic structure. It is only necessary to find the magnetic field sensor with the largest measured magnetic field data. The magnetic field sensor with the largest measured magnetic field data is the jth magnetic field sensor from top to bottom in the vertical direction, and the filling quantity of the filling material is j.

[0070] It should be noted that the above is the data of the distance the piston moves downward determined by combining the number of magnetic field sensors that the piston passes in sequence during its movement. In practical applications, if the piston is at the top of the filling pipe and is directly facing a magnetic field sensor, then this magnetic field sensor should be used as the starting point sensor. When the piston moves downward and passes the adjacent magnetic field sensor below the starting point sensor, then this magnetic field sensor is the first magnetic field sensor that the piston passes. That is to say, the jth magnetic field sensor referred to above is counted in sequence according to the magnetic field sensors after the starting point sensor.

[0071] On this basis, after determining the distance data of the piston moving downward along the filling pipe, the distance data and the diameter size of the filling material can be ratioed and rounded; it should be noted that the rounding after the ratio calculation here should be rounded off, that is, for each filling material, as long as more than half of it enters the polymer injection fracturing pipe, it is considered to have been filled into the polymer injection fracturing pipe.

[0072] Obviously, in this embodiment, when determining the filling quantity of each filling object, there is no restriction on the diameter size of a single filling object. Therefore, in actual application, no matter what type and size of filling object is replaced, it will not affect the implementation of the technical solution of this application.

[0073] As shown in FIG2 , based on any of the above embodiments, in order to further and more intuitively display the current position of the piston 3 , in another optional embodiment of the present application, it may further include:

[0074] An indicator light 42 is provided corresponding to the position of each magnetic field sensor 41 ; when the magnetic field data measured by the magnetic field sensor 41 is greater than or equal to the second preset magnetic field threshold, the indicator light 42 corresponding to the magnetic field sensor 41 lights up to identify the position of the piston 3 .

[0075] As shown in Figure 1, an indicator light 42 can be set at the same height position of each magnetic field sensor 41 on the plate-shaped support 4. Specifically, an LED indicator light can be used. When the magnetic field data measured by the corresponding magnetic field sensor 41 is greater than the second preset magnetic field threshold, the LED indicator light will light up. Therefore, the staff can directly know the current position of the piston 3 in the filling pipe 1 based on the position where the LED indicator light is on.

[0076] In addition, scale data may be further set on the plate-like support 4. The scale data may be data representing the movement distance of the piston 3 to the position of each indicator light 42, or may be the corresponding filling quantity of the filling material 8 when the piston 3 moves to the position of each indicator light 42. There is no specific restriction on this in the present application.

[0077] Further optionally, a slideway may be further provided on the plate-shaped support 4, and each magnetic field sensor 41 is sequentially arranged on the slideway. By sliding each magnetic field sensor 41 on the slideway, the spacing between each magnetic field sensor 41 is adjusted to adapt to filling materials 8 of different diameters.

[0078] Based on the above discussion, as shown in FIG6 , in a specific embodiment of the present application, the piston 3 provided with the magnet structure 7 may specifically include:

[0079] A columnar body 31, a sealing ring 32 disposed at one end of the columnar body 31; a threaded structure disposed at the other end of the columnar body 31, and a nut 33 disposed in cooperation with the threaded structure; wherein the outer diameter of the sealing ring 32 is the same as the inner diameter of the filling pipe 1;

[0080] The magnet structure 7 is an annular magnet, which is sleeved on the columnar body 31 and located between the sealing ring 32 and the nut 33 .

[0081] As shown in FIG6 , at least two sealing rings 32 should be coaxially arranged on the columnar body 31 to ensure that when the piston 3 is arranged in the filling pipe 1, the central axis of the columnar body 31 coincides with the central axis of the filling pipe 1. On this basis, the annular magnet is squeezed and fixed on the columnar body 31 by the nut 33 and is confined between the sealing ring 32 and the nut 33, thereby ensuring the stability of the fixing of the annular magnet.

[0082] It is understandable that when the piston 3 is disposed in the filling pipe 1, one end of the sealing ring 32 is disposed at the top and one end of the nut 33 is disposed at the bottom, so that the annular magnet and other structures are not in the high-pressure liquid, isolating the annular magnet from the high hydraulic environment.

[0083] To summarize, in order to realize counting the amount of refills added to the polymer-injected fracturing tube in the present application, a device is provided to detect the distance data of the piston pushing the refills downward along the filling tube. Thus, the upper computer can finally determine the amount of refills added to the polymer-injected fracturing tube according to the diameter size of a single refill and the distance data of the piston movement, thereby avoiding the problem of refill leakage caused by inaccurate statistics of the refilled amount.

[0084] The present application also provides a method for detecting the counting of injection materials in a polymer injection fracturing system, which is applied to the device for detecting the counting of injection materials in a polymer injection fracturing system as described in any one of the above items; as shown in FIG7 , the method for detecting the counting of injection materials in a polymer injection fracturing system may include:

[0085] S1: Obtain the distance data of the distance measuring component detecting the piston pushing the filling material in the filling pipe.

[0086] S2: Determine the amount of injectable material to be injected into the polymer injection fracturing pipe according to the distance data and the diameter size of a single injectable material.

[0087] Optionally, the distance measuring assembly includes a magnet structure arranged on the piston and a magnetic field sensor arranged on the side wall of the filling pipe and communicatively connected to the host computer;

[0088] Accordingly, the above step S1 may specifically include:

[0089] S11: When the magnet structure and the piston move in the filling pipe, the magnetic field data of the magnet structure is sensed and detected by the magnetic field sensor;

[0090] S12: Determine distance data according to the magnetic field data.

[0091] Further optionally, the magnetic field sensor includes a plurality of magnetic field sensors extending and distributed along the length direction of the filling pipe on the plate-shaped support, and each magnetic field sensor is distributed at equal intervals; as the piston moves in the filling pipe, at least one of the magnetic field sensors can sense and detect the magnetic field generated by the magnetic structure at the same time point;

[0092] Accordingly, the above step S12 may specifically include:

[0093] Based on the magnetic field data currently collected by each magnetic field sensor, the two magnetic field sensors with the largest magnetic field data respectively measure the magnetic field data, combined with the moving distance formula , determine the moving distance of the piston, perform a ratio operation on the moving distance and the diameter size, and obtain the filling quantity; where, , , To set the distance between the magnet structure and The number of magnetic field intensity intervals divided by the magnetic field intensity within the range, is the distance between the magnetic field sensor and the piston The magnetic field intensity interval to which the magnetic field data measured by the magnetic field sensor belongs when the magnetic field data is within the range; and , N is the total number of magnetic field sensors, , Respectively and The magnetic field data currently measured by the magnetic field sensor, and the and The magnetic field data currently measured by the magnetic field sensors is the largest.

[0094] In another optional embodiment of the present application, the method for detecting the count of injection materials in the polymer injection fracturing system may include the following process:

[0095] Step 1: pre-place the filling material and the piston in the filling pipe in sequence, then connect the top of the filling pipe to the hydraulic equipment, fix the plate-shaped support with the magnetic field sensor on the outer wall of the filling pipe, and connect each magnetic field sensor to the upper computer for communication;

[0096] Step 2: The host computer, magnetic field sensor and other equipment perform power-on self-test;

[0097] Step 3: Determine whether the host computer display is normal and whether the host computer and each magnetic field sensor can communicate normally. If abnormal, check whether each magnetic field sensor is normal and restart the computer;

[0098] Step 4: Turn on the hydraulic equipment to start the process of injecting the filler into the polymer injection fracturing pipe;

[0099] Step 5: Each magnetic field sensor continues to work, detects and responds to the magnetic signal passing through its detection range, and the indicator light corresponding to the magnetic field sensor lights up, reflecting that the magnetic signal is detected passing through;

[0100] Step 6: Read the amount of filling material according to the corresponding scale of the indicator light;

[0101] Step 7: The analog signal of the magnetic field sensor is collected and converted into a digital signal, uploaded and stored in the host computer, and the host computer converts the displacement information of the piston into the quantity information of the filling material.

[0102] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the term "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment that includes a series of elements are inherent to the elements. In the absence of more restrictions, the elements limited by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or equipment that includes the elements. In addition, the above-mentioned technical solution provided in the embodiment of the present application is consistent with the corresponding technical solution in the prior art in principle, and the part is not described in detail, so as not to repeat too much.

[0103] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A device for counting and detecting injection materials in a polymer injection fracturing system, characterized in that: include: A distance measuring component, used for detecting the distance data of the piston pushing the filling material in the filling pipe; The host computer connected to the distance measuring component is used to determine the injection quantity of the injection material into the polymer injection fracturing pipe according to the distance data and the diameter size of a single injection material.

2. The device for counting and detecting injection materials in a polymer injection fracturing system according to claim 1, characterized in that: The distance measuring assembly includes a magnet structure arranged on the piston and a magnetic field sensor arranged on the outer side wall of the filling pipe and communicatively connected to the host computer; The magnetic field sensor is used to sense and detect magnetic field data of the magnetic structure when the magnetic structure moves with the piston in the filling pipe; The host computer determines the distance data according to the magnetic field data, and determines the filling quantity of the filling object according to the distance data.

3. The device for counting and detecting injection materials in a polymer injection fracturing system according to claim 2, characterized in that: The distance measuring assembly comprises a plate-shaped support arranged on the outer side wall of the filling pipe; the magnetic field sensor comprises a plurality of magnetic field sensors extending and distributed along the length direction of the filling pipe on the plate-shaped support, and each of the magnetic field sensors is distributed at equal intervals; As the piston moves in the filling pipe, at least one of the magnetic field sensors can sense and detect the magnetic field generated by the magnet structure at the same time point.

4. The device for counting and detecting injection materials in a polymer injection fracturing system according to claim 3, characterized in that: The host computer is used to measure the magnetic field data respectively from the two magnetic field sensors with the largest magnetic field data currently collected by each magnetic field sensor, combined with the moving distance formula , determine the moving distance of the piston, perform a ratio operation on the moving distance and the diameter size, and obtain the filling quantity; wherein, is the distance data, is the distance between two adjacent magnetic field sensors, , , To set the distance between the magnet structure and The number of magnetic field intensity intervals divided by the magnetic field intensity within the range, is the distance between the magnetic field sensor and the piston The magnetic field intensity interval to which the magnetic field data measured by the magnetic field sensor belongs when the magnetic field data is within the range; and , N is the total number of magnetic field sensors, , Respectively and The magnetic field data currently measured by the magnetic field sensor, and the and The magnetic field data currently measured by the magnetic field sensors is the largest.

5. The device for counting and detecting injection materials in a polymer injection fracturing system according to claim 3, characterized in that: Each of the magnetic field sensors is used to send the magnetic field data to the host computer when the measured magnetic field data is greater than a first preset magnetic field threshold.

6. The device for counting and detecting injection materials in a polymer injection fracturing system according to claim 3, characterized in that: An indicator light is provided corresponding to the position of each magnetic field sensor; when the magnetic field data measured by the magnetic field sensor is greater than or equal to a second preset magnetic field threshold, the indicator light corresponding to the magnetic field sensor lights up to identify the position of the piston.

7. The device for counting and detecting injection materials in a polymer injection fracturing system according to claim 2, characterized in that: The piston comprises a columnar body, a sealing ring arranged at one end of the columnar body; a threaded structure arranged at the other end of the columnar body, and a nut arranged in cooperation with the threaded structure; wherein the outer diameter of the sealing ring is the same as the inner diameter of the filling pipe; Wherein, the magnet structure is an annular magnet, which is sleeved on the columnar body and located between the sealing ring and the nut.

8. A method for counting and detecting injection materials in a polymer injection fracturing system, characterized in that: Applied to the device for counting and detecting injection materials in a polymer injection fracturing system according to any one of claims 1 to 7, the method comprising: Obtaining distance data of the distance measurement component detecting piston pushing the filling material in the filling pipe; The injection quantity of the injector to be injected into the polymer injection fracturing pipe is determined according to the distance data and the diameter size of a single injector.

9. The method for detecting the counting of injection materials in a polymer injection fracturing system according to claim 8, characterized in that: The distance measuring assembly includes a magnet structure arranged on the piston and a magnetic field sensor arranged on the side wall of the filling pipe and communicatively connected to the host computer; Obtaining distance data of the distance measurement component detecting piston pushing the filling material in the filling pipe, including: When the magnet structure and the piston move in the filling pipe, receiving magnetic field data of the magnet structure sensed and detected by the magnetic field sensor; The distance data is determined based on the magnetic field data.

10. The method for detecting the counting of injection materials in a polymer injection fracturing system according to claim 9, characterized in that: The magnetic field sensor comprises a plurality of magnetic field sensors extending and distributed along the length direction of the filling pipe on the plate-shaped support, and each of the magnetic field sensors is distributed at equal intervals; as the piston moves in the filling pipe, at least one of the magnetic field sensors can sense and detect the magnetic field generated by the magnetic structure at the same time point; Determining the distance data according to the magnetic field data includes: According to the magnetic field data measured by the two magnetic field sensors with the largest magnetic field data currently collected by each of the magnetic field sensors, combined with the moving distance formula , determine the moving distance of the piston, perform a ratio operation on the moving distance and the diameter size, and obtain the filling quantity; wherein, , , 2n is the distance between the magnet structure and The number of magnetic field intensity intervals divided by the magnetic field intensity within the range, is the distance between the magnetic field sensor and the piston The magnetic field intensity interval to which the magnetic field data measured by the magnetic field sensor belongs when the magnetic field data is within the range; and , N is the total number of magnetic field sensors, , Respectively and The magnetic field data currently measured by the magnetic field sensor, and the and The magnetic field data currently measured by the magnetic field sensors is the largest.

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