Parameter selection method of oil pumping device and related device

Abstract

The application discloses a parameter selection method of an oil pumping device and related equipment. The method comprises the following steps: calculating the cyclic stress amplitude and the converted stress of the first N micro-element sections in the sucker rod in sequence from the bottom to the top of the well based on preset device parameters and geological parameters; obtaining the sucker rod height and the actual liquid column load corresponding to the first N micro-element sections when the cyclic stress amplitude corresponding to the first N micro-element sections is greater than or equal to zero and the converted stress is greater than the allowable stress; and selecting the preset device parameters as the target device parameters when the sucker rod height is greater than or equal to the depth of the well mouth and the liquid column load error is less than the preset precision error. The oil pumping device selection method provided in the embodiment divides the calculation of the sucker rod related parameters into infinite micro-element sections, judges whether the current sucker rod is suitable according to the calculation result of each micro-element section, and provides a theoretical basis for determining the optimal sucker rod combination mode.

Description

TECHNICAL FIELD

[0001] The present specification relates to the field of oil production, and more specifically, to a parameter selection method of an oil pumping device and related equipment. BACKGROUND

[0002] The oil well lifting methods include gas lifting, rod pump lifting, screw pump lifting, electric submersible pump lifting and the like. The rod pump lifting is a commonly used lifting method in the current oil fields, and accounts for more than 90%. The core components of the rod pump lifting are the pumping unit, the sucker rod and the oil pump. Selecting appropriate pumping unit and sucker rod can not only reduce unnecessary energy waste, but also obtain higher yield benefit.

[0003] At present, the combination calculation of the sucker rod mostly uses the general parameter calculation of the whole rod, and the calculation accuracy is difficult to reach a high level. Therefore, in order to ensure safety, the selection of the sucker rod is often biased towards the rod column with a higher grade, which greatly increases the energy consumption. SUMMARY

[0004] A series of simplified concepts are introduced in the summary section, which will be further described in detail in the specific embodiment section. The summary section of the present application does not mean to attempt to limit the key features and necessary technical features of the claimed technical solutions, nor to determine the protection scope of the claimed technical solutions.

[0005] In order to select the oil pumping device that meets the strength requirement and saves energy consumption, in a first aspect, the present application provides a parameter selection method of an oil pumping device, the above method comprising:

[0006] calculating the cyclic stress amplitude and the reduced stress corresponding to the first N micro-element sections of the sucker rod in order from the bottom to the top of the well based on the preset device parameters and the geological parameters, wherein the preset device parameters include preset sucker rod parameters;

[0007] in the case that the cyclic stress amplitude corresponding to the first N micro-element sections is greater than or equal to zero and the reduced stress is greater than the allowable stress, obtaining the sucker rod height and the actual liquid column load corresponding to the first N micro-element sections;

[0008] in the case that the sucker rod height is greater than or equal to the depth of the well mouth and the liquid column load error is less than the preset precision error, selecting the preset device parameters as the target device parameters, wherein the liquid column load error is determined according to the actual liquid column load and the assumed liquid column load.

[0009] Optionally, the above method further comprises:

[0010] in the case that the sucker rod height corresponding to the first N micro-element sections is less than the depth of the well mouth, modifying the preset sucker rod parameters.

[0011] Optionally, the method further comprises:

[0012] obtaining the assumed liquid column load according to preset equipment parameters;

[0013] obtaining the liquid column load error based on the assumed liquid column load and the actual liquid column load.

[0014] Optionally, the method further comprises:

[0015] modifying the sucker rod parameters in a case that the liquid column load error is greater than the preset precision error;

[0016] updating the assumed liquid column load based on the actual liquid column load.

[0017] Optionally, the cyclic stress amplitude and the reduced stress corresponding to the first N micro-element sections in the sucker rod are sequentially calculated in the order from the well bottom to the well mouth based on the preset equipment parameters and the geological parameters, and the method comprises:

[0018] the cyclic stress amplitude corresponding to the first N micro-element sections in the sucker rod is sequentially calculated in the order from the well bottom to the well mouth based on the preset equipment parameters and the geological parameters;

[0019] the reduced stress corresponding to the first N micro-element sections is calculated under the condition that the cyclic stress amplitude is greater than or equal to zero.

[0020] Optionally, the preset equipment parameters further comprise pump parameters, and the method further comprises:

[0021] the pump parameters are modified in a case that the cyclic stress amplitude is less than zero.

[0022] Optionally, the cyclic stress amplitude and the reduced stress corresponding to the first N micro-element sections in the sucker rod are sequentially calculated in the order from the well bottom to the well mouth based on the preset equipment parameters and the geological parameters, and the method comprises:

[0023] the maximum load and the minimum load of the sucker rod string corresponding to the first N micro-element sections in the sucker rod are sequentially calculated in the order from the well bottom to the well mouth based on the preset equipment parameters and the geological parameters;

[0024] the cyclic stress amplitude and the reduced stress are obtained based on the maximum load and the minimum load.

[0025] Optionally, the well bottom is a medium-deep position of an oil layer.

[0026] In a second aspect, the present application further provides a parameter selection device for an oil pumping equipment, comprising:

[0027] The computing unit is configured to sequentially calculate cyclic stress amplitudes and reduced stresses of the first N micro-element sections in the sucker rod from the bottom to the top of the well according to preset device parameters and geological parameters, wherein the preset device parameters include preset sucker rod parameters.

[0028] The obtaining unit is configured to obtain the sucker rod heights and actual liquid column loads of the first N micro-element sections when the cyclic stress amplitudes of the first N micro-element sections are greater than or equal to zero and the reduced stresses are greater than the allowable stress.

[0029] The selecting unit is configured to select the preset device parameters as the target device parameters when the sucker rod heights are greater than or equal to the depth of the well head and the liquid column load error is less than the preset precision error, wherein the liquid column load error is determined according to the actual liquid column load and the assumed liquid column load.

[0030] In a third aspect, an electronic device is provided, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor is configured to implement the steps of the parameter selection method of the oil pumping device according to any one of the first aspect when executing the computer program stored in the memory.

[0031] In a fourth aspect, a computer readable storage medium is provided, which stores a computer program, and the computer program is executable on a processor to implement the parameter selection method of the oil pumping device according to any one of the first aspect.

[0032] In summary, the parameter selection method of the oil pumping equipment provided in the embodiment of the present application comprises: calculating the cyclic stress amplitude and the reduced stress of the first N micro-element sections in the sucker rod in sequence from the bottom to the wellhead based on the preset equipment parameters and the geological parameters, obtaining the sucker rod height and the actual liquid column load corresponding to the first N micro-element sections in the case that the cyclic stress amplitude corresponding to the first N micro-element sections is greater than or equal to zero and the reduced stress is greater than the allowable stress, and selecting the preset equipment parameters as the target equipment parameters in the case that the sucker rod height is greater than or equal to the wellhead depth and the liquid column load error is less than the preset precision error. The method provided in the embodiment calculates the cyclic stress amplitude and the reduced stress of the first N micro-element sections from the bottom to the wellhead by using the finite element calculation method based on the pre-known equipment parameters and the geological parameters, obtains the specific value of N in the case that the reduced stress is greater than the allowable stress, and calculates the sucker rod height and the liquid column load error corresponding to the first N micro-element sections. In the case that the calculated sucker rod height is greater than the depth of the oil layer, it is considered that the sucker rod meets the strength requirement. By the idea of the finite element calculation by section, the strength requirement of the oil pumping equipment can be ensured, and the selection efficiency is improved. In the case that the liquid column load error is less than the preset precision error, it is considered that the selected sucker rod parameters are appropriate. Compared with the existing method of selecting a high-strength equipment based on experience, the method provides a theoretical basis for quantitatively selecting the oil pumping equipment, so that the selected equipment meets the strength requirement and the economic requirement, and the waste of resources caused by blindly selecting a high-performance oil pumping equipment is avoided.

[0033] The parameter selection method of the oil pumping equipment, other advantages, objects and features of the present application will be embodied in part by the following description, and will be understood by those skilled in the art through research and practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0034] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are intended to further assist in understanding the preferred embodiments, and are not considered as limiting the present description. Moreover, like reference numerals designate like parts throughout the several views in the drawings. In the drawings:

[0035] Figure 1 A flowchart of the parameter selection method of the oil pumping equipment provided in the embodiment of the present application;

[0036] Figure 2 A schematic diagram of the parameter selection principle of the oil pumping equipment provided in the embodiment of the present application;

[0037] Figure 3 A structural schematic diagram of the parameter selection device of the oil pumping equipment provided in the embodiment of the present application;

[0038] Figure 4A parameter selection electronic device structure schematic diagram of an oil pumping equipment provided by the embodiment of the application. DETAILED DESCRIPTION

[0039] The method provided by the embodiment obtains the specific value of N in the case that the converted stress is greater than the allowable stress by using the finite element calculation method from the well bottom to the well head in sequence according to the pre-known equipment parameters and geological parameters, and calculates the pumping rod calculation height and the liquid column load error corresponding to the first N micro-element sections. In the case that the pumping rod height is greater than the oil layer depth, it is considered that the pumping rod meets the strength requirement, and in the case that the liquid column load error is less than the preset precision error, it is considered that the selected pumping rod parameters are appropriate. The pumping equipment selection method provided by the embodiment divides the calculation of the pumping rod related parameters into infinite micro-element sections, judges whether the current pumping rod is appropriate according to the calculation result of each micro-element section, and provides a theoretical basis for determining the optimal pumping rod combination mode.

[0040] The terms "first", "second", "third", "fourth" and the like in the description and claims of the application and in the above drawings (if any) are used for distinguishing between similar objects, not necessarily for describing a particular sequential or chronological order. It is to be understood that the use of these terms herein is merely for distinguishing between the comparable objects and the use of these terms in the context of the application is not a representation that the objects so distinguished are necessarily present in that order. Also, the terms "comprise", "comprising", "include", "including", and the like are to be construed open-ended, i.e., to mean including, but not limited to, unless otherwise indicated. It is to be understood that both the foregoing general description and the following detailed description are merely exemplary of the application and are intended to provide an overview or framework for understanding the application. The above and further objects, features and advantages of the application will be better understood from the following detailed description taken in connection with the accompanying drawings, in which:

[0041] Reference will now be made to Figure 1 A parameter selection method flowchart of an oil pumping equipment provided by the embodiment of the application, and the method can specifically include:

[0042] S110, based on the preset equipment parameters and the geological parameters, the cyclic stress amplitude and the converted stress corresponding to the first N micro-element sections in the pumping rod are calculated in sequence from the well bottom to the well head, wherein the preset equipment parameters include the preset pumping rod parameters;

[0043] Specifically, equipment parameters may include: rod diameter, allowable stress, rod density, cross-sectional area, pump piston cross-sectional area, traveling valve orifice cross-sectional area, tubing inner and outer diameters, tubing fluid density, pumping unit crankshaft radius, etc. Geological parameters may include: reservoir depth, geothermal gradient, overall wellbore heat transfer coefficient, formation oil and water mass flow rates, and formation oil and water specific heat, etc.

[0044] like Figure 2 As shown, starting from the bottom of the well, we sequentially select micro-segments of length X, and calculate the cyclic stress amplitude and equivalent stress of the sucker rod formed by the first N micro-segments (N is a positive integer, such as 1, 2, 3, ..., N). The cyclic stress amplitude can represent the fatigue strength of the sucker rod, and the equivalent stress can be used to represent the stress load of the sucker rod when it receives the maximum impact. Taking the position in the middle and deep oil layer as the starting point of the calculation, with a height of 0, the height of the pump as H1, and the length of the micro-segment as X, the length corresponding to the first micro-segment is X, and the total length of the sucker rod used in the calculation is X. The average height of the first micro-segment is Hv1 = (H1 + H1 + X) / 2; and so on, the length corresponding to the Nth micro-segment is also X, and the total length of the sucker rod used in the calculation is N × X, and the average height of the Nth micro-segment is Hv. N = (H1+H1+N×X) / 2.

[0045] The temperature t of the Nth infinitesimal segment is calculated based on geological parameters and the average height of the Nth infinitesimal segment. N :

[0046]

[0047] In the formula: t N —Temperature of the Nth micro-element, unit: °C; K1—Overall heat transfer coefficient of the wellbore, unit: W / (M·°C); to—Bottomhole crude oil temperature, unit: °C; m—Formation temperature gradient, unit: °C / m; M O —Mass flow rate of formation oil, unit: kg / s; m W —Mass flow rate of formation water, in kg / s; C O —Specific heat of formation oil, unit: W / (Kg·℃); C W —Specific heat of formation water, in W / (Kg·℃).

[0048] Based on the temperature t of the Nth infinitesimal segment N Calculate the viscosity μ of the mixture inside the tubing:

[0049]

[0050] Where: μ—dynamic viscosity of crude oil, unit: mPa·s; t N— the temperature of the Nth microelement segment, unit: ℃; a—coefficient constant; b—temperature index.

[0051] The friction force of the sucker rod in motion is calculated according to the viscosity of the mixed liquid, and the cyclic stress amplitude and the reduced stress are obtained according to the friction force, the welfare of the crude oil to the sucker rod and the inertial force of the sucker rod in motion.

[0052] S120, in the case that the cyclic stress amplitude corresponding to the above-mentioned first N microelement segments is greater than or equal to zero and the reduced stress is greater than the allowable stress, the sucker rod height and the actual liquid column load corresponding to the first N microelement segments are obtained.

[0053] Specifically, the cyclic stress amplitude and the reduced stress corresponding to 1 to N are calculated step by step, and in the case that the cyclic stress amplitude corresponding to N is greater than or equal to zero and the reduced stress is greater than the allowable stress, it is determined that the microelement segment cannot be increased at this time, and the length at this time has reached the maximum length of the sucker rod length that can be reached by the current preset device parameter. The sucker rod height H N corresponding to the first N microelement segments is obtained, and the actual liquid column load W N of the sucker rod corresponding to the first N microelement segments is calculated by formula 3.

[0054] W N = W N-1 + ρ m g L N (d p 2 -d rp 2 )π / 4 (formula 3)

[0055] In the formula: ρ m — the density of the mixed liquid in the tubing, unit: Kg / m 3 ; L N = N×X— the current calculated sucker rod length, unit: m; d p — the diameter of the sucker rod, unit: m; d rp — the current selected diameter of the sucker rod, unit: m; W N-1 is the actual liquid column load corresponding to the N-1th microelement segment, and when N=0, W0=0.

[0056] S130, in the case that the sucker rod height is greater than or equal to the wellhead depth and the liquid column load error is less than the preset precision error, the preset device parameter is selected as the target device parameter, wherein the liquid column load error is determined according to the actual liquid column load and the assumed liquid column load.

[0057] Specifically, when the calculated sucker rod height H N is greater than or equal to the depth L zIn the case that the oil pumping rod height calculated at this time reaches the wellhead and the strength reaches the requirement, in the case that the liquid column load error is less than the preset precision error, the oil pumping equipment (including the oil pumping rod, the oil pumping pump and the oil pumping machine) parameters selected at this time are appropriate, material waste is not caused, and energy consumption is reduced.

[0058] In summary, the method provided in the embodiment calculates the cyclic stress amplitude and the converted stress of the first N micro-element sections from the well bottom to the wellhead by using the finite element calculation method based on the pre-known equipment parameters and geological parameters, and obtains the specific value of N in the case that the converted stress is greater than the allowable stress. The oil pumping rod height corresponding to the first N micro-element sections and the liquid column load error are calculated. In the case that the oil pumping rod calculation height is greater than the oil layer depth, it is considered that the oil pumping rod meets the strength requirement. In the case that the liquid column load error is less than the preset precision error, it is considered that the selected oil pumping rod parameters are appropriate. The oil pumping equipment selection method provided in the embodiment divides the calculation of the oil pumping rod related parameters into infinite micro-element sections, judges whether the current oil pumping rod is appropriate according to the calculation result of each micro-element section, and provides a theoretical basis for determining the optimal oil pumping rod combination mode.

[0059] In some examples, the method further includes:

[0060] In the case that the oil pumping rod height corresponding to the first N micro-element sections is less than the wellhead depth, the preset oil pumping rod parameters are modified.

[0061] Specifically, in the case that the cyclic stress amplitude corresponding to the first N micro-element sections is greater than or equal to zero and the converted stress is greater than the allowable stress, the oil pumping rod height corresponding to the first N micro-element sections is obtained as H N = H1+N×X. When H N is less than L z , at this time, the calculated oil pumping rod cannot reach the wellhead, that is, the strength cannot meet the requirement, at this time, the oil pumping rod with a higher strength grade is selected as the new preset oil pumping rod parameter, and the cyclic stress amplitude and the converted stress corresponding to the first N micro-element sections are recalculated according to the new preset oil pumping rod parameter. The specific method is the same as that in the above embodiment, and will not be described here.

[0062] In summary, in the case that the oil pumping rod height corresponding to the first N micro-element sections is less than the wellhead depth, it is considered that the current selected oil pumping rod parameters are insufficient in strength to reach the height of the wellhead, and the oil pumping rod with a higher strength grade is selected as the new preset oil pumping rod parameter, and the appropriate target equipment parameter is calculated.

[0063] In some examples, the method further includes:

[0064] The assumed liquid column load is obtained according to the preset equipment parameters;

[0065] The above-mentioned liquid column load error is obtained based on the assumed liquid column load and the actual liquid column load.

[0066] Specifically, the assumed liquid column load W is calculated according to Formula 4. e :

[0067] W e =πρ m gL p (d p 2 -d rp 2 ) (Formula 4)

[0068] In the formula: ρ m —Density of the mixture inside the tubing, unit: kg / m³ 3 L p —Length of the entire sucker rod section in the well, in meters (m); d p —Diameter of the oil pump, in meters (d) rp —Currently selected sucker rod diameter, unit: m.

[0069] The liquid column load error E is calculated according to formula 5. a :

[0070] E a =|W N -W e | / W e (Formula 5)

[0071] In some examples, the above method also includes:

[0072] If the above-mentioned liquid column load error is greater than the above-mentioned preset accuracy error, modify the above-mentioned sucker rod parameters;

[0073] The assumed liquid column load is updated based on the actual liquid column load described above.

[0074] Specifically, if the liquid column load error exceeds the preset accuracy error, the selected sucker rod parameters are considered unsuitable. In this case, the sucker rod parameters are modified, and the assumed liquid column load is updated with the currently calculated actual liquid column load. Based on the above method, the cyclic stress amplitude and equivalent stress corresponding to the first N micro-segments are recalculated to determine suitable target equipment parameters. Updating the assumed liquid column load with the actual liquid column load ensures that the results of the next calculation are more consistent with actual requirements.

[0075] In summary, when the liquid column load error is greater than the preset accuracy error, by modifying the sucker rod parameters and updating the assumed liquid column load with the actual liquid column load, and based on the new equipment parameters and the assumed liquid column load, more suitable target equipment parameters can be obtained, thus accelerating the convergence time of the calculation.

[0076] In some examples, the preset device parameters and the geological parameters are used to calculate the cyclic stress amplitude and the reduced stress of the first N microelement sections in the sucker rod in sequence from the well bottom to the well mouth, including:

[0077] The preset device parameters and the geological parameters are used to calculate the cyclic stress amplitude of the first N microelement sections in the sucker rod in sequence from the well bottom to the well mouth.

[0078] The reduced stress of the first N microelement sections is calculated under the condition that the cyclic stress amplitude is greater than or equal to zero.

[0079] Specifically, when calculating the cyclic stress amplitude and the reduced stress, the cyclic stress amplitude is calculated first, and then the reduced stress is calculated under the condition that the cyclic stress amplitude is greater than or equal to zero. The cyclic stress amplitude meets the precondition of the reduced stress, and by determining the cyclic stress amplitude first, unnecessary calculation amount can be reduced, and the ideal target device parameter can be selected more quickly.

[0080] In summary, the method provided by the embodiment of the present application first calculates the cyclic stress amplitude, and then calculates the reduced stress under the precondition that the cyclic stress amplitude meets the requirement, which can reduce the calculation amount and make the selection process more rapid.

[0081] In some examples, the preset device parameters further include the pumping parameters, and the method further includes:

[0082] The pumping parameters are modified under the condition that the cyclic stress amplitude is less than zero.

[0083] Specifically, in actual application and calculation, it is found that the parameters of the pumping unit have a great influence on the cyclic stress amplitude. In the case that the cyclic stress amplitude is less than zero, the parameters of the pumping unit, such as the pump diameter, can be modified to improve the cyclic stress amplitude. After the pumping unit parameters are modified, the cyclic stress amplitude and the reduced stress of the first N microelement sections are recalculated according to the newly modified preset device parameters based on the above method to determine the appropriate target device parameters.

[0084] In summary, in the case that the cyclic stress amplitude is less than zero, the parameters of the pumping unit can be modified to improve the cyclic stress amplitude, and the cyclic stress amplitude and the reduced stress of the first N microelement sections are recalculated according to the newly modified preset device parameters to determine more suitable target device parameters.

[0085] In some examples, the preset device parameters and the geological parameters are used to calculate the cyclic stress amplitude and the reduced stress of the first N microelement sections in the sucker rod in sequence from the well bottom to the well mouth, including:

[0086] The maximum load and the minimum load of the pumping unit suspension point corresponding to the first N micro-element sections in the sucker rod are calculated in sequence from the bottom to the top of the well based on preset device parameters and geological parameters;

[0087] The maximum load and the minimum load are used to obtain the cyclic stress amplitude and the reduced stress.

[0088] Specifically, the maximum load P of the pumping unit suspension point is calculated by formula 6. max The minimum load P is calculated by formula 7. min The minimum load P is calculated by formula 7.

[0089] P max = W r + W1+ I u + F u (formula 6)

[0090] P min = W r - I d - F d (formula 7)

[0091] In the formula, P max , P min is the maximum and minimum load borne by the suspension point, unit: KN; W r is the load generated by the difference between the gravity and the buoyancy of the sucker rod column in the upstroke, unit: KN; W1 is the load generated by the gravity of the liquid column and the buoyancy of the sucker rod in the downstroke, unit: KN; I u , I d is the maximum inertia load generated by the sucker rod in the upstroke and downstroke, unit: KN; F u , F d is the maximum friction load in the upstroke and downstroke, unit: KN.

[0092] The intermediate parameters can be obtained by formula 8 to formula 9.

[0093] W r = (ρ s - ρ l ) gf r L (formula 8)

[0094] W1= ρ l gf p L (formula 9)

[0095]

[0096]

[0097]

[0098]

[0099] Wherein: L - sucker rod length, unit: m; p S - density of sucker rod material, unit: kg / m 3 ; p l - density of pumping fluid, unit: kg / m 3 ; f r - cross-sectional area of sucker rod, unit: m 2 ; f p - cross-sectional area of pumping piston, unit: m 2 ; f o - cross-sectional area of traveling valve hole, unit: m 2 ; s - stroke of pumping unit, unit: m; n - stroke frequency of pumping unit, unit: times / min; r - crank radius of pumping unit, unit: m; l - length of connecting rod of pumping unit, unit: m; F rl - friction between sucker rod and liquid column, unit: N; μ' - flow number of valve flow.

[0100] Friction between sucker rod and liquid column F r1 :

[0101]

[0102] Wherein: μ - dynamic viscosity of liquid in well, Pa·s; m d - ratio of inner diameter of tubing to diameter of sucker rod; V max - maximum downward speed of sucker rod string, m / s. It can be calculated according to maximum movement speed of suspension point, and when a simple harmonic motion model is used, its value is:

[0103]

[0104] Cyclic stress amplitude σ a can be obtained by formula 16:

[0105]

[0106] Reduced stress σ of sucker rod c can be obtained by formula 17:

[0107]

[0108] In some examples, the above well bottom is a middle-deep position of the oil layer.

[0109] Specifically, after calculation, the target equipment parameters calculated by selecting the middle-deep position of the oil layer as the well bottom can meet the strength requirements of the bottom of the oil layer and the top of the oil layer, and can also achieve the requirements of fully utilizing materials and reducing energy consumption.

[0110] Please refer toFigure 3 An embodiment of the parameter selection device for the oil pumping equipment in the application may include:

[0111] The computing unit 21 is configured to sequentially calculate the cyclic stress amplitude and the converted stress of the first N micro-element sections in the sucker rod in order from the bottom to the top of the well based on preset equipment parameters and geological parameters, wherein the preset equipment parameters include preset sucker rod parameters.

[0112] The obtaining unit 22 is configured to obtain the sucker rod height and the actual liquid column load corresponding to the first N micro-element sections when the cyclic stress amplitude corresponding to the first N micro-element sections is greater than or equal to zero and the converted stress is greater than the allowable stress.

[0113] The selecting unit 23 is configured to select the preset equipment parameters as the target equipment parameters when the sucker rod height is greater than or equal to the depth of the well mouth and the liquid column load error is less than the preset precision error, wherein the liquid column load error is determined according to the actual liquid column load and the assumed liquid column load.

[0114] As shown in Figure 4 The application also provides an electronic device 300, which includes a memory 310, a processor 320, and a computer program 311 stored in the memory 320 and executable on the processor, and the processor 320 implements the steps of any method for selecting the parameters of the oil pumping equipment when executing the computer program 311.

[0115] Since the electronic device described in the embodiment is the device used to implement the parameter selection device for the oil pumping equipment in the application, the specific implementation of the electronic device in the embodiment and its various forms can be understood by those skilled in the art based on the method described in the embodiment, so the implementation of the electronic device in the method in the application will not be described in detail, and the device used to implement the method in the application belongs to the scope of protection of the application.

[0116] In the specific implementation process, the computer program 311 can implement Figure 1 any embodiment in the corresponding embodiment when executed by the processor.

[0117] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0118] Those skilled in the art will appreciate that embodiments of the application can be readily used as a method, a system or a computer program product. Accordingly, the application can take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the application can take the form of a computer program product on one or more computer readable storage media (including, but not limited to, disk memory, CD-ROMs, optical storage devices, etc.) embodying computer readable program code.

[0119] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 one or more flowcharts and / or blocks Figure 1 means for functionally implementing the steps listed in the flowchart block or blocks.

[0120] These computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture including instructions which implement the function specified in the flowchart block or blocks. Figure 1 one or more flowcharts and / or blocks Figure 1 means for functionally implementing the steps listed in the flowchart block or blocks.

[0121] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 one or more flowcharts and / or blocks Figure 1 means for functionally implementing the steps listed in the flowchart block or blocks.

[0122] Embodiments of the application also provide a computer program product, which comprises computer software instructions, when the computer software instructions are run on a processing device, cause the processing device to perform the steps as ​ the flow of selecting parameters of the oil pumping device in the corresponding embodiments.

[0123] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium that the computer can store or be integrated into a data storage device such as a server, data center, etc. containing one or more available media. The available media can be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)), etc.

[0124] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

[0125] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0126] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or they can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiments.

[0127] In addition, each of the functional units in the various embodiments of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0128] When the integrated unit is realized 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 such understanding, the technical solutions of the present application, essentially or in part, or all or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the various embodiments of the method of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk, and various other media that can store program codes.

[0129] The above, the above embodiments are only to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims

1. A method for selecting parameters of an oil pumping device, characterized in that, include: Based on preset equipment parameters and geological parameters, the cyclic stress amplitude and equivalent stress corresponding to the first N micro-segments of the sucker rod are calculated sequentially from the bottom of the well to the wellhead. The preset equipment parameters include preset sucker rod parameters. If the cyclic stress amplitude corresponding to the first N micro-segments is greater than or equal to zero and the calculated stress is greater than the allowable stress, obtain the sucker rod height and actual liquid column load corresponding to the first N micro-segments. When the sucker rod height is greater than or equal to the wellhead depth and the liquid column load error is less than the preset accuracy error, the preset equipment parameters are selected as the target equipment parameters, wherein the liquid column load error is determined based on the actual liquid column load and the assumed liquid column load.

2. The method as described in claim 1, characterized in that, Also includes: If the height of the sucker rod corresponding to the first N micro-segments is less than the wellhead depth, the preset sucker rod parameters are modified.

3. The method as described in claim 1, characterized in that, Also includes: The assumed liquid column load is obtained based on preset equipment parameters; The liquid column load error is obtained based on the assumed liquid column load and the actual liquid column load.

4. The method as described in claim 3, characterized in that, Also includes: If the liquid column load error is greater than the preset accuracy error, modify the sucker rod parameters; The hypothetical liquid column load is updated based on the actual liquid column load.

5. The method as described in claim 1, characterized in that, The calculation of the cyclic stress amplitude and equivalent stress corresponding to the first N micro-segments of the sucker rod based on preset equipment parameters and geological parameters in order from the bottom of the well to the wellhead includes: The cyclic stress amplitude corresponding to the first N micro-segments of the sucker rod is calculated sequentially from the bottom of the well to the wellhead based on preset equipment parameters and geological parameters. Under the condition that the cyclic stress amplitude is greater than or equal to zero, calculate the equivalent stress corresponding to the first N micro-segments.

6. The method as described in claim 5, characterized in that, The preset equipment parameters also include oil pump parameters, and the method further includes: When the cyclic stress amplitude is less than zero, the parameters of the oil pump are modified.

7. The method as described in claim 1, characterized in that, Based on preset equipment parameters and geological parameters, the cyclic stress amplitude and equivalent stress of the first N micro-segments of the sucker rod are calculated sequentially from the bottom of the well to the wellhead, including: Based on preset equipment parameters and geological parameters, the maximum and minimum loads of the pumping unit suspension points corresponding to the first N micro-segments of the sucker rod are calculated sequentially from the bottom of the well to the wellhead. The cyclic stress amplitude and the reduced stress are obtained based on the maximum load and the minimum load.

8. The method as described in claim 1, characterized in that, The bottom of the well is located at a medium-deep position of the oil layer.

9. A parameter selection device for an oil pumping unit, characterized in that, include: The calculation unit is used to calculate the cyclic stress amplitude and equivalent stress corresponding to the first N micro-segments of the sucker rod in the order from the bottom of the well to the wellhead, based on preset equipment parameters and geological parameters. The preset equipment parameters include preset sucker rod parameters. The acquisition unit is used to acquire the sucker rod height and actual liquid column load corresponding to the first N micro-segments when the cyclic stress amplitude corresponding to the first N micro-segments is greater than or equal to zero and the calculated stress is greater than the allowable stress. The selection unit is used to select the preset equipment parameters as target equipment parameters when the sucker rod height is greater than or equal to the wellhead depth and the liquid column load error is less than the preset accuracy error. The liquid column load error is determined based on the actual liquid column load and the assumed liquid column load.

10. An electronic device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor executes the computer program stored in the memory to implement the steps of the parameter selection method for the oil pumping equipment as described in any one of claims 1-8.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by the processor, it implements the parameter selection method for the oil pumping equipment as described in any one of claims 1-8.

Images