Method and system for determining interference magnitude of soluble spherical pig

Abstract

The invention discloses a method and a system for determining the interference magnitude of a soluble spherical pig. The method comprises the following steps: acquiring the diameter abrasion of a contact surface per kilometer of the spherical pig, the surface area of the spherical pig, the area of the contact surface of the spherical pig and abrasion test equipment before an abrasion test, and the length and the inner diameter of a natural gas gathering and transportation pipeline to be cleaned; obtaining the ball diameter abrasion of the spherical pig per kilometer; further obtaining the theoretical diameter abrasion of the spherical pig after the pipeline is cleaned; and finally, the interference magnitude of the soluble spherical pig is determined according to the theoretical diameter abrasion of the spherical pig, the inner diameter of the natural gas gathering and transportation pipeline to be cleaned and the allowance of the interference magnitude. The method is simple, convenient, high in operability, high in reliability and practicability and capable of effectively obtaining the magnitude of interference of the spherical pig.

Description

Technical Field

[0001] The invention belongs to the technical field of pipeline cleaning, and relates to a method and a system for determining the interference amount of a soluble pipe cleaning ball. Background Art

[0002] During the gas field exploitation process, underground natural gas needs to be transported through pipelines. Since the raw natural gas is often accompanied by produced water, foaming agents, mechanical impurities, etc., during the gathering and transportation process, it will affect the pipeline gas transmission capacity, gas transmission efficiency, metering accuracy, block instruments, and aggravate the corrosion of the inner wall of the pipeline. For the smaller-diameter gathering and transportation pipelines in the gas field, conventional cleaning technology is prone to blockage, ball loss, and difficulty in positioning. There is currently no mature cleaning technology. Therefore, small-diameter gathering and transportation pipelines in gas fields are rarely cleaned. During winter operation, the accumulated liquid in the pipes is very likely to form hydrates and freeze, resulting in suspension of transportation, affecting the peak gas supply in winter, and causing safety accidents in serious cases.

[0003] In response to this, a soluble cleaning ball cleaning technology was developed, and field cleaning tests of multiple main pipes were carried out. In view of the solubility of the soluble cleaning ball and the influence of the temperature of the pipeline medium on the solubility, the uncertainty of the interference of the soluble cleaning ball leads to the sometimes good and sometimes poor cleaning effect of the soluble cleaning ball. When the interference is too large, the pressure of the cleaning ball is high and the cleaning ball gets stuck; when the interference is too small, the cleaning force of the cleaning ball is insufficient and the cleaning efficiency is poor. At present, there is no effective method to scientifically determine the interference of the cleaning ball. On the one hand, it can make the soluble cleaning ball close to the pipe wall to prevent air and liquid leakage, and on the other hand, it can ensure that the soluble cleaning ball pushes smoothly and does not get stuck, ensuring the best efficiency in clearing out accumulated liquid or impurities. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a method and system for determining the interference amount of a soluble pigging ball, thereby solving the technical problem that the interference amount of a soluble pigging ball cannot be determined in the prior art.

[0005] The present invention is achieved through the following technical solutions:

[0006] A method for determining the interference amount of a soluble pig ball comprises the following steps:

[0007] Obtain the wear of the pig ball per kilometer of contact surface diameter during the wear test, the contact surface area of ​​the pig ball and the wear test equipment before the wear test, the surface area of ​​the pig ball, and the length and inner diameter of the natural gas gathering and transportation pipeline to be cleaned;

[0008] Obtaining the sphere diameter wear per kilometer of the pipe cleaning ball according to the contact surface diameter wear per kilometer of the pipe cleaning ball, the area of ​​the contact surface, and the surface area of ​​the pipe cleaning ball;

[0009] According to the diameter wear of the cleaning ball per kilometer and the length of the natural gas gathering and transportation pipeline to be cleaned, the theoretical diameter wear of the cleaning ball after the pipeline is cleaned is obtained;

[0010] The interference amount of the soluble pig ball is determined according to the theoretical diameter wear of the pig ball, the inner diameter of the natural gas gathering and transportation pipeline to be cleaned, and the interference amount margin.

[0011] Preferably, the wear of the pipe cleaning ball per kilometer of contact surface diameter is specifically:

[0012]

[0013] In the formula,

[0014] DW 1km接触面 For the wear test, the pig ball wears per kilometer of contact surface diameter;

[0015] D 磨耗前 It is the diameter of the contact surface between the pig ball and the wear test equipment before the wear test;

[0016] D 磨耗后 It is the diameter of the contact surface between the cleaning ball and the wear test equipment after the wear test;

[0017] n1 is the number of equipment running circles corresponding to 1km of wear on the wear test equipment;

[0018] n2 is the number of revolutions of the equipment during the wear test.

[0019] Preferably, the wear of the ball diameter per kilometer of the pipe cleaning ball is specifically:

[0020]

[0021] Where DW 1km球体 is the wear of the pig ball per kilometer of ball diameter;

[0022] S 接触面 is the contact area between the pig and the abrasion test equipment before the abrasion test;

[0023] S 球表面积 is the surface area of ​​the cleaning ball.

[0024] Preferably, the process of determining the contact area between the pipe cleaning ball and the abrasion test equipment before the abrasion test is specifically as follows:

[0025] S 接触面 = 接触面 (π* 磨耗前 )

[0026] Where W 接触面 It is the contact surface width between the cleaning ball and the abrasion test equipment before the abrasion test.

[0027] Preferably, the theoretical diameter wear of the cleaning ball is specifically:

[0028] DW 磨耗 =*DW 1km球体

[0029] In the formula,

[0030] DW 磨耗 is the theoretical ball diameter wear of the pig ball;

[0031] L is the length of the natural gas gathering and transmission pipeline to be cleaned.

[0032] Preferably, the interference fit of the soluble pipe cleaning ball is specifically:

[0033]

[0034] Where y is the interference of the soluble pig ball;

[0035] d is the inner diameter of the natural gas gathering and transportation pipeline to be cleaned;

[0036] y′ is the interference margin.

[0037] Preferably, the interference margin is 0.5% to 1.2%.

[0038] A system for determining the interference amount of a soluble pig ball, comprising:

[0039] Data acquisition module: The data acquisition module is used to obtain the wear of the pig ball per kilometer of contact surface diameter during the wear test, the area of ​​the contact surface between the pig ball and the wear test equipment before the wear test, the surface area of ​​the pig ball, and the length and inner diameter of the natural gas gathering and transportation pipeline to be cleaned;

[0040] The first data processing module: The first data processing module is used to obtain the diameter wear of the pipe cleaning ball per kilometer according to the diameter wear of the contact surface per kilometer of the pipe cleaning ball, the area of ​​the contact surface and the surface area of ​​the pipe cleaning ball;

[0041] Second data processing module: The second data processing module is used to obtain the theoretical diameter wear of the pig after the pipeline is cleaned according to the ball diameter wear per kilometer of the pig and the length of the natural gas gathering and transportation pipeline to be cleaned;

[0042] The third data processing module: The third data processing module is used to determine the interference of the soluble pig according to the theoretical diameter wear of the pig, the inner diameter of the natural gas gathering and transportation pipeline to be cleaned, and the interference margin.

[0043] A terminal device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above method when executing the computer program.

[0044] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the above method are implemented.

[0045] Compared with the prior art, the present invention has the following beneficial technical effects:

[0046] Based on the above technical scheme, the present invention discloses a method for determining the interference of a soluble cleaning ball, which obtains the interference of the soluble cleaning ball by fitting and calculating the relevant data obtained from the wear test. The method is simple and convenient, and has strong operability. The process effectively simulates the movement process of the soluble cleaning ball in the cleaning operation, has high reliability and practicality, and effectively obtains the interference of the cleaning ball. Setting the interference margin can not only make the soluble cleaning ball close to the pipe wall without air leakage and liquid leakage, but also ensure that the soluble cleaning ball can be pushed smoothly without jamming, thereby ensuring the best efficiency of clearing accumulated liquid or impurities. The method has the characteristics of scientificity, practicality, and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0048] Figure 1 It is a schematic flow chart of a method for determining the interference amount of a soluble pipe cleaning ball in Example 1 of the present invention;

[0049] Figure 2 It is a structural schematic diagram of a system for determining the interference amount of a soluble pipe cleaning ball in Example 2 of the present invention;

[0050] Figure 3 Schematic diagram of the structure of the Akron abrasion machine used in the abrasion test in Example 3 of the present invention;

[0051] Figure 4 This is a schematic diagram of the structure of the experimental sample after the pipe cleaning ball is cut in Example 3 of the present invention;

[0052] Figure 5 This is a flow chart for determining the interference amount of the soluble ball in Example 3 of the present invention;

[0053] Figure 6This is a method for determining the interference amount of the soluble ball in Example 4 of the present invention.

[0054] Among them, 1. rubber wheel shaft, 2. motor, 3. reducer, 4. grinding wheel, 5. electronic counter, 6. center hole, 7. first side of the sample, 8. second side of the sample. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0056] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0058] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0059] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0060] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0062] Example 1

[0063] like Figure 1 As shown, the present invention discloses a method for determining the interference amount of a soluble pipe cleaning ball, comprising the following steps:

[0064] S1: Obtain the wear of the pig ball per kilometer of contact surface diameter during the wear test, the contact surface area of ​​the pig ball and the wear test equipment before the wear test, the surface area of ​​the pig ball, and the length and inner diameter of the natural gas gathering and transportation pipeline to be cleaned;

[0065] Among them, the wear of the pig ball per kilometer of contact surface diameter is specifically:

[0066]

[0067] In the formula,

[0068] DW 1km接触面 For the wear test, the pig ball wears per kilometer of contact surface diameter;

[0069] D 磨耗前 It is the diameter of the contact surface between the pig ball and the wear test equipment before the wear test;

[0070] D 磨耗后 It is the diameter of the contact surface between the cleaning ball and the wear test equipment after the wear test;

[0071] n1 is the number of equipment running circles corresponding to 1km of wear on the wear test equipment;

[0072] n2 is the number of revolutions of the equipment during the wear test.

[0073] S2: Obtaining the diameter wear of the pipe cleaning ball per kilometer according to the diameter wear of the contact surface per kilometer of the pipe cleaning ball, the area of ​​the contact surface between the pipe cleaning ball and the wear test equipment before the wear test, and the surface area of ​​the pipe cleaning ball;

[0074] Among them, the specific wear of the ball diameter per kilometer of the pig is:

[0075]

[0076] Where DW 1km球体 is the wear of the pig ball per kilometer of ball diameter;

[0077] S 接触面 is the contact area between the pig and the abrasion test equipment before the abrasion test;

[0078] S 球表面积 is the surface area of ​​the cleaning ball.

[0079] The process of determining the contact area between the pig ball and the abrasion test equipment before the abrasion test is as follows:

[0080] S 接触面 =W 接触面 (π*D 磨耗前 )

[0081] Where W 接触面 It is the contact surface width between the cleaning ball and the abrasion test equipment before the abrasion test.

[0082] S3: according to the diameter wear of the cleaning ball per kilometer and the length of the natural gas gathering and transportation pipeline to be cleaned, obtaining the theoretical diameter wear of the cleaning ball after the pipeline is cleaned;

[0083] Among them, the theoretical diameter wear of the cleaning ball is specifically:

[0084] DW 磨耗 =L*DW 1km球体

[0085] In the formula,

[0086] DW 磨耗 is the theoretical ball diameter wear of the pig ball;

[0087] L is the length of the natural gas gathering and transmission pipeline to be cleaned.

[0088] S4: determining the interference of the soluble pig ball according to the theoretical diameter wear of the pig ball, the inner diameter of the natural gas gathering and transportation pipeline to be cleaned, and the interference margin;

[0089] The interference of the soluble cleaning ball is specifically:

[0090]

[0091] In the formula, y is the interference of the soluble pig ball;

[0092] d is the inner diameter of the natural gas gathering and transportation pipeline to be cleaned.

[0093] y′ is the interference margin, which can be 0.5% to 1.2%.

[0094] More preferably, the abrasion test in the present invention can be carried out at 10-50°C, by spraying water of corresponding temperature to the abrasion test equipment to simulate the corresponding actual temperature of the pipe cleaning, thereby realizing the simulation of the working environment of the pipe cleaning ball under different ambient temperatures.

[0095] Example 2

[0096] In addition, if Figure 2 As shown, the present invention also discloses a system for determining the interference amount of a soluble pig ball, comprising:

[0097] Data acquisition module: The data acquisition module is used to obtain the wear of the pig ball per kilometer of contact surface diameter during the wear test, the area of ​​the contact surface between the pig ball and the wear test equipment before the wear test, the surface area of ​​the pig ball, and the length and inner diameter of the natural gas gathering and transportation pipeline to be cleaned;

[0098] The first data processing module: The first data processing module is used to obtain the diameter wear of the pipe cleaning ball per kilometer according to the diameter wear of the contact surface per kilometer of the pipe cleaning ball, the area of ​​the contact surface and the surface area of ​​the pipe cleaning ball;

[0099] Second data processing module: The second data processing module is used to obtain the theoretical diameter wear of the pig after the pipeline is cleaned according to the ball diameter wear per kilometer of the pig and the length of the natural gas gathering and transportation pipeline to be cleaned;

[0100] The third data processing module: The third data processing module is used to determine the interference of the soluble pig according to the theoretical diameter wear of the pig, the inner diameter of the natural gas gathering and transportation pipeline to be cleaned, and the interference margin.

[0101] Example 3

[0102] In order to further explain the technical solution of the present invention, this embodiment is used for illustration:

[0103] (1) Akron abrasion machine (see Figure 3 ), including a rubber wheel shaft 1, a motor 2, a reducer 3, a grinding wheel 4 and an electronic counter 5, to make a pipe cleaning ball wear sample (see Figure 4 ), measure the maximum outer diameter of the pipe cleaning ball before and after wear and the contact surface width between the sample and the grinding wheel of the wear machine. During wear, spray the sample with clean water of different temperatures (10℃~50℃) to simulate the state of liquid accumulation at different temperatures (10℃~50℃) in the pipeline. Calculate the wear mileage through the diameter wear loss of the pipe cleaning ball, combined with the rotation speed and diameter of the grinding wheel of the wear machine. Calculate the wear thickness of the pipe cleaning ball per kilometer based on the reduced size of the diameter of the wear pipe cleaning ball.

[0104] (2) Calculation of interference. Calculate the contact area between the sample and the grinding wheel of the wear machine. Divide the surface area of ​​the soluble pipe cleaning ball by the contact area between the sample and the grinding wheel of the wear machine to obtain the multiple of the surface area of ​​the soluble pipe cleaning ball and the contact area of ​​the sample grinding wheel, and convert it into the wear of the pipe cleaning ball per kilometer.

[0105] In order to ensure the cleaning efficiency of the soluble cleaning ball, combined with the length and inner diameter of the natural gas gathering and transportation pipeline, the optimal interference of the soluble cleaning ball is calculated when the interference margin of the cleaning ball is 0.5% to 1.2% when the soluble cleaning ball reaches the end point. Among them, the interference margin is the interference reserved for the solubility of the cleaning ball to ensure that the cleaning ball is close to the pipe wall, does not leak gas and liquid, and improves the cleaning efficiency of the cleaning ball.

[0106] A method for determining the interference amount of soluble pigging balls in natural gas gathering and transportation pipelines:

[0107] like Figure 5 As shown, step 1: data preparation before the experiment

[0108] (1) Length of natural gas gathering and transmission pipeline, L (km)

[0109] (2) Inner diameter of natural gas gathering and transportation pipeline, d, (mm)

[0110] Step 2: Wear test

[0111] (1) Make the pipe cleaning ball test sample (see Figure 4 ), the sample thickness is 5 to 50 mm, including a center hole 6, a first side surface 7 of the sample and a second side surface 8 of the sample. The center hole is punched, and the hole diameter is consistent with the diameter of the rubber wheel shaft.

[0112] (2) Measure the maximum outer diameter of the sample, that is, the outer diameter of the pipe cleaning ball before wear, recorded as D 磨耗前 , (mm, millimeters).

[0113] (3) After grinding both sides of the sample, glue it to the rubber wheel, and fix the glued rubber wheel on the rubber wheel shaft. Adjust the grinding wheel of the Akron abrasive machine to make it fully contact with the sample.

[0114] Measure the contact width between the sample and the grinding wheel, recorded as W 接触面 , (mm, millimeters).

[0115] (4) Spray clean water of different temperatures (10℃~50℃) on the sample, turn on the electronic counter switch, adjust the preset number button n=2123~3416 times, press the "Start" button to start the experiment, when the count reaches the preset value, press the "Stop" and "Reset" buttons, remove the sample, brush off the wear debris, measure the maximum outer diameter of the sample, that is, the outer diameter of the pig after wear, and record it as D 磨耗后 , (mm, millimeters).

[0116] Step 3: Calculate the interference

[0117] Abrasion of soluble pig ball sample with 1 km contact surface diameter:

[0118]

[0119] In the formula,

[0120] DW 1km接触面，T is the wear of the pig per kilometer of contact surface diameter when the wear test is carried out at temperature T;

[0121] D 磨耗前 It is the diameter of the contact surface between the pig ball and the wear test equipment before the wear test;

[0122] D 磨耗后 It is the diameter of the contact surface between the cleaning ball and the wear test equipment after the wear test;

[0123] n1 is the number of equipment running circles corresponding to 1 km of wear on the wear test equipment. In this embodiment, n1 of the equipment is 2123;

[0124] n2 is the number of revolutions of the equipment during the wear test.

[0125] The contact area between the soluble pig ball sample and the grinding wheel of the Akron abrasive machine:

[0126] S 接触面 =W 接触面 (π*D 磨耗前 )(mm 2 , square millimeters)

[0127] Soluble pig surface area:

[0128]

[0129] Wear loss of pig ball diameter for 1 km mileage:

[0130]

[0131] Calculate the wear of the soluble pig ball diameter after pigging is completed:

[0132] DW 磨耗，T =L*DW 1km球体，T (mm, millimeters)

[0133] Optimal interference:

[0134]

[0135] In the formula, y T is the interference of the soluble pig ball when pigging at temperature T;

[0136] d is the inner diameter of the natural gas gathering and transportation pipeline to be cleaned.

[0137] y′ is the interference margin.

[0138] In this embodiment, the interference margin is 0.5% to 1.2%. When cleaning the pipe at temperature T, the interference margin of the soluble cleaning ball is

[0139] The present invention obtains wear test data through Akron abrasion machine, and simulates different cleaning temperatures to obtain the interference of soluble cleaning balls under specific cleaning environment temperature. The data are obtained through experiments, measurements and calculations. The experimental process simulates the movement process of the soluble cleaning ball cleaning operation, which has certain scientificity, reliability and practicality.

[0140] Field tests on 10 gas pipelines and 4 gas mains showed that the interference fit of soluble pigging balls at different temperatures is targeted, reliable and applicable, and plays a great role in guiding the pigging of on-site gathering and transportation pipelines.

[0141] The working principle and use process of the present invention:

[0142] Working principle of Akron abrasion machine:

[0143] (1) Transmission: The motor is connected to the reducer through a coupling, causing the rubber wheel shaft to rotate clockwise, and the sample is clamped on the rubber shaft.

[0144] (2) Electronic counter: After "starting", the execution relay inside the machine is immediately energized, and its contacts are directly connected to the power supply to output to the outside of the machine, making the motor run. The end of the grinding wheel shaft is equipped with a photoelectric conversion switch connected to the counter for counting. When the count reaches the preset value, the relay automatically disengages.

[0145] Example 4

[0146] In order to better understand the technical solution of the present invention, the following examples are provided for illustration:

[0147] like Figure 6 As shown, the optimal interference fit of the soluble pig ball for a natural gas gathering and transportation pipeline of φ219×7×11 (outer diameter (mm)×wall thickness (mm)×length (km)) at a natural gas temperature of 40°C is calculated.

[0148] Step 1: Data preparation before the experiment

[0149] (1) Length of natural gas gathering and transportation pipeline, L = 11 km,

[0150] (2) Inner diameter of natural gas gathering and transportation pipeline, d = 219-2 × 7 = 205 mm;

[0151] Step 2: Wear test

[0152] (1) Prepare the pipe cleaning ball test sample and measure the maximum outer diameter of the sample, that is, the outer diameter of the pipe cleaning ball before wear, recorded as D 磨耗前 =217mm.

[0153] (2) After grinding both sides of the sample, glue it to the rubber wheel, and fix the glued rubber wheel on the rubber wheel shaft. Adjust the grinding wheel of the Akron abrasive machine to make it fully contact with the sample.

[0154] Measure the contact width between the sample and the grinding wheel, recorded as W 接触面 =44mm.

[0155] (3) Spray the sample with 40℃ clean water, adjust the preset number button to 2123, start the experiment, remove the sample after the end, brush off the wear debris, and measure the maximum outer diameter of the sample, that is, the outer diameter of the pipe cleaning ball after wear, which is recorded as D 磨耗后 =212.5mm.

[0156] Step 3: Calculate the interference

[0157] Abrasion of soluble pig ball sample with 1 km contact surface diameter:

[0158]

[0159]

[0160] DW 1km接触面，40℃ =217-212.5=4.5mm

[0161] The contact area between the soluble pig ball sample and the grinding wheel of the Akron abrasive machine:

[0162] S 接触面 =W 接触面 (π*D 磨耗前 )

[0163] S 接触面 =44(π*217)=29980.72mm 2

[0164] Soluble pig surface area:

[0165]

[0166]

[0167] Wear loss of pig ball diameter for 1 km mileage:

[0168]

[0169]

[0170] Calculate the wear of the soluble pig ball diameter after pigging is completed:

[0171] DW 磨耗，40℃ =L*DW 1km球体，40℃

[0172] DW 磨耗，40℃ =11*0.91=10.04mm

[0173] Optimal interference:

[0174]

[0175]

[0176] y 40℃ =5.4%~6.1%

[0177] Example 5

[0178] Further, in order to effectively explain the present invention, the following examples are provided for illustration:

[0179] Calculate the optimal interference of soluble pigs for natural gas gathering and transportation pipelines φ219×7×11 (outer diameter mm×wall thickness mm×length km) at a natural gas temperature of 25°C

[0180] Step 1: Data preparation before the experiment

[0181] (1) Length of natural gas gathering and transportation pipeline, L = 11 km,

[0182] (2) Inner diameter of natural gas gathering and transportation pipeline, d = 219-2 × 7 = 205 mm;

[0183] Step 2: Wear test

[0184] (1) Prepare the pipe cleaning ball test sample and measure the maximum outer diameter of the sample, that is, the outer diameter of the pipe cleaning ball before wear, recorded as D 磨耗前 =217mm.

[0185] (2) After grinding both sides of the sample, glue it to the rubber wheel, and fix the glued rubber wheel on the rubber wheel shaft. Adjust the grinding wheel of the Akron abrasive machine to make it fully contact with the sample.

[0186] Measure the contact width between the sample and the grinding wheel, recorded as W 接触面 =44mm.

[0187] (3) Spray the sample with 25℃ clean water, adjust the preset number button to 2123, start the experiment, remove the sample after the experiment, brush off the wear debris, and measure the maximum outer diameter of the sample, that is, the outer diameter of the pig after wear, which is recorded as D 磨耗后 =212.5mm.

[0188] Step 3: Calculate the interference

[0189] Abrasion of soluble pig ball sample with 1 km contact surface diameter:

[0190]

[0191]

[0192] DW 1km接触面，25℃ =217-213.8=3.2mm

[0193] The contact area between the soluble pig ball sample and the grinding wheel of the Akron abrasive machine:

[0194] S 接触面 =W 接触面 (π*D 磨耗前 )

[0195] S 接触面 =44(π*217)=29980.72mm 2

[0196] Soluble pig surface area:

[0197]

[0198]

[0199] Wear loss of pig ball diameter for 1 km mileage:

[0200]

[0201]

[0202] Calculate the wear of the soluble pig ball diameter after pigging is completed:

[0203] DW 磨耗，25℃ =L*DW 1km球体，25℃

[0204] DW 磨耗，25℃ =11*0.65=7.15mm

[0205] Optimal interference:

[0206]

[0207]

[0208] y 40℃ =3.99%~4.69%

[0209] In addition, a schematic diagram of a terminal device is provided in an embodiment of the present invention. The terminal device of this embodiment includes: a processor, a memory, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps in the above-mentioned method embodiments are implemented. Alternatively, when the processor executes the computer program, the functions of each module / unit in the above-mentioned device embodiments are implemented.

[0210] The computer program may be divided into one or more modules / units, and the one or more modules / units are stored in the memory and executed by the processor to accomplish the present invention.

[0211] The terminal device may be a computing device such as a desktop computer, a notebook, a PDA, a cloud server, etc. The terminal device may include, but is not limited to, a processor and a memory.

[0212] The processor can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0213] The memory may be used to store the computer programs and / or modules, and the processor implements various functions of the terminal device by running or executing the computer programs and / or modules stored in the memory and calling the data stored in the memory.

[0214] If the module / unit integrated in the terminal device is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0215] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for determining the interference of a soluble pipe cleaning ball, characterized in that: The following steps are involved: Obtain the wear of the pig ball per kilometer of contact surface diameter during the wear test, the contact surface area of ​​the pig ball and the wear test equipment before the wear test, the surface area of ​​the pig ball, and the length and inner diameter of the natural gas gathering and transportation pipeline to be cleaned; Obtaining the sphere diameter wear per kilometer of the pipe cleaning ball according to the contact surface diameter wear per kilometer of the pipe cleaning ball, the area of ​​the contact surface, and the surface area of ​​the pipe cleaning ball; According to the diameter wear of the cleaning ball per kilometer and the length of the natural gas gathering and transportation pipeline to be cleaned, the theoretical diameter wear of the cleaning ball after the pipeline is cleaned is obtained; The interference amount of the soluble pig ball is determined according to the theoretical diameter wear of the pig ball, the inner diameter of the natural gas gathering and transportation pipeline to be cleaned, and the interference amount margin.

2. A method for determining the interference amount of a soluble pig ball according to claim 1, characterized in that: The wear of the pig ball per kilometer of contact surface diameter is specifically: In the formula, DW 1km接触面 For the wear test, the pig ball wears per kilometer of contact surface diameter; D 磨耗前 It is the diameter of the contact surface between the pig ball and the wear test equipment before the wear test; D 磨耗后 It is the diameter of the contact surface between the cleaning ball and the wear test equipment after the wear test; n1 is the number of equipment running circles corresponding to 1km of wear on the wear test equipment; n2 is the number of revolutions of the equipment during the wear test.

3. The method for determining the interference amount of a soluble pig ball according to claim 1, characterized in that: The wear of the ball diameter per kilometer of the pipe cleaning ball is specifically: Where DW 1km球体 is the wear of the pig ball per kilometer of ball diameter; S 接触面 is the contact area between the pig and the abrasion test equipment before the abrasion test; S 球表面积 is the surface area of ​​the cleaning ball.

4. A method for determining the interference amount of a soluble pig ball according to claim 3, characterized in that: The process of determining the contact area between the pig ball and the abrasion test equipment before the abrasion test is specifically as follows: S 接触面 =W 接触面 (π*D 磨耗前 ) Where W 接触面 It is the contact surface width between the cleaning ball and the abrasion test equipment before the abrasion test.

5. The method for determining the interference amount of a soluble pig ball according to claim 1, characterized in that: The theoretical diameter wear of the cleaning ball is specifically: DW 磨耗 =L*DW 1km球体 In the formula, DW 磨耗 is the theoretical ball diameter wear of the pipe cleaning ball; L is the length of the natural gas gathering and transmission pipeline to be cleaned.

6. The method for determining the interference amount of a soluble pig ball according to claim 1, characterized in that: The interference amount of the soluble pig ball is specifically: Where y is the interference of the soluble pig ball; d is the inner diameter of the natural gas gathering and transportation pipeline to be cleaned; y′ is the interference margin.

7. A method for determining the interference amount of a soluble pig ball according to claim 6, characterized in that: The interference margin is 0.5% to 1.2%.

8. A system for determining the interference amount of a soluble pipe cleaning ball, characterized in that: include: Data acquisition module: The data acquisition module is used to obtain the wear of the pig ball per kilometer of contact surface diameter during the wear test, the area of ​​the contact surface between the pig ball and the wear test equipment before the wear test, the surface area of ​​the pig ball, and the length and inner diameter of the natural gas gathering and transportation pipeline to be cleaned; The first data processing module: The first data processing module is used to obtain the diameter wear of the pipe cleaning ball per kilometer according to the diameter wear of the contact surface per kilometer of the pipe cleaning ball, the area of ​​the contact surface and the surface area of ​​the pipe cleaning ball; Second data processing module: The second data processing module is used to obtain the theoretical diameter wear of the pig after the pipeline is cleaned according to the ball diameter wear per kilometer of the pig and the length of the natural gas gathering and transportation pipeline to be cleaned; The third data processing module: The third data processing module is used to determine the interference of the soluble pig according to the theoretical diameter wear of the pig, the inner diameter of the natural gas gathering and transportation pipeline to be cleaned, and the interference margin.

9. A terminal device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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