Five-dimensional space stress monitoring method for oil and gas pipeline

Abstract

The embodiment of the invention provides a five-dimensional space stress monitoring method for an oil and gas pipeline. The technical problem that the accuracy of stress monitoring for the oil and gas pipeline is poor can be solved. The method comprises the following steps: arranging a plurality of first strain sensors on a first detection section at intervals to obtain a first test result; arranging a plurality of second strain sensors on the second detection section at intervals to obtain a second test result; based on the first axial tensile stress, the first axial compressive stress, the first tensile stress circumference angle, the second axial tensile stress, the second axial compressive stress and the second tensile stress circumference angle, obtaining the total bending stress of the section; obtaining a section total bending moment based on the section total bending stress; and based on the pipe section infinitesimal, obtaining a shear load through the first section bending moment, the second section bending moment and the first preset distance. According to the embodiment of the invention, quantitative monitoring and analysis of five-dimensional space stress are realized, and the method is applied to key nodes of pipe circumference constraint structures including anchoring piers, buttresses, pipe clamps and the like of a tunnel crossing section.

Description

Technical Field

[0001] The present application relates to the technical field of oil and gas pipelines, and in particular to a five-dimensional spatial force monitoring method for oil and gas pipelines. Background Art

[0002] Oil and gas pipelines are subjected to external loads when transporting oil and natural gas. In one scenario, when the external loads are too concentrated, the local stress state of the oil and gas pipeline exceeds the allowable value, the pipeline is damaged, and a disaster occurs.

[0003] In order to ensure the normal operation of oil and gas pipelines, improving the accuracy of stress state and stress state detection of oil and gas pipelines has become an urgent problem to be solved. Summary of the invention

[0004] The embodiment of the present application provides a five-dimensional spatial force monitoring method for oil and gas pipelines, which can solve the technical problem of poor accuracy of force monitoring for oil and gas pipelines.

[0005] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides a five-dimensional spatial force monitoring method for an oil and gas pipeline, and the five-dimensional spatial force monitoring method for an oil and gas pipeline comprises: arranging a plurality of first strain sensors at intervals on a first detection section to obtain a first test result; the first detection section is an annular section of the oil and gas pipeline; the first test result comprises a first section bending moment, a first axial tensile stress, a first axial compressive stress, and a first tensile stress circumferential angle of the first detection section; arranging a plurality of second strain sensors at intervals on a second detection section to obtain a second test result; the second detection section is an annular section of the oil and gas pipeline; the first detection section and the second detection section are The two test sections are located on the same side of the pipe circumferential constraint structure; the distance between the first test section and the second test section is the first preset distance; the second test result includes the second section bending moment, the second axial tensile stress, the second axial compressive stress, and the second tensile stress circumferential angle of the second test section; based on the first axial tensile stress, the first axial compressive stress, the first tensile stress circumferential angle, the second axial tensile stress, the second axial compressive stress, and the second tensile stress circumferential angle, the total section bending stress is obtained; based on the total section bending stress, the total section bending moment is obtained; based on the pipe segment microelement, the shear load is obtained through the first section bending moment, the second section bending moment and the first preset distance.

[0007] Based on the above description of the five-dimensional spatial force monitoring method for oil and gas pipelines provided in the embodiment of the present application, it can be seen that the five-dimensional spatial force monitoring method for oil and gas pipelines realizes quantitative monitoring and analysis of the five-dimensional spatial force of the pipeline including the total bending stress of the cross-section, the total bending moment of the cross-section and the shear load, and can be applied to key nodes including the anchor piers, piers, pipe clamps, etc. of the pipe surrounding constraint structures including the tunnel crossing section, which helps to better grasp the stress distribution and load state of the pipeline, and is conducive to supporting further pipeline safety assessments, providing a powerful grip for intelligent management of pipeline maintenance, and ensuring pipeline operation and energy supply safety.

[0008] In a feasible implementation of the first aspect, when executing the step of obtaining the shear load based on the pipe segment microelement through the first section bending moment, the second section bending moment and the first preset distance, the five-dimensional space force monitoring method for the oil and gas pipeline also includes:

[0009] Based on the microelement of the pipe segment, the average shear load is obtained by the difference between the bending moment of the first section and the bending moment of the second section and the first preset distance;

[0010] Based on the cumulative amount of section bending moment, the absolute shear load borne by the pipeline between the first detection section and the second detection section is obtained;

[0011] Based on the relative bending moment between the first detection section and the second detection section, the relative shear load borne by the pipeline between the first detection section and the second detection section is obtained.

[0012] In a feasible implementation of the first aspect, the number of the plurality of first strain sensors is set to three, and they are arranged along the circumference of the oil and gas pipeline, and the circumferential interval between any two adjacent first strain sensors is greater than or equal to 60°.

[0013] In a feasible implementation manner of the first aspect, the circumferential interval between any two adjacent first strain sensors is 120°.

[0014] In a feasible implementation of the first aspect, the five-dimensional spatial force monitoring method for oil and gas pipelines further includes:

[0015] Vector decomposition of the first section bending moment to obtain the first shear force component;

[0016] Vector decomposition of the second section bending moment to obtain the second shear force component;

[0017] The first shear force component and the second shear force component are directionally combined to obtain the shear force resultant.

[0018] In a feasible implementation of the first aspect, when executing the step of obtaining the total bending stress of the cross section based on the first axial tensile stress, the first axial compressive stress, the first tensile stress circumferential angle, the second axial tensile stress, the second axial compressive stress, and the second tensile stress circumferential angle, the five-dimensional spatial force monitoring method for oil and gas pipelines further includes:

[0019] Based on the first axial tensile stress and the second axial tensile stress, a maximum axial tensile stress is obtained;

[0020] Based on the first axial compressive stress and the second axial compressive stress, a maximum axial compressive stress is obtained;

[0021] The calculation formula for the total bending stress of the cross section includes:

[0022] S b =0.5×(S t +S c );

[0023] Among them, S t Expressed as the maximum axial compressive stress, S c Expressed as the maximum axial tensile stress, S b Expressed as the total bending stress in the cross section.

[0024] In a feasible implementation of the first aspect, the calculation formula of the total bending moment of the section includes:

[0025]

[0026] Among them, S b It is expressed as the total bending stress of the cross section, D is expressed as the diameter of the outer pipe of the pipeline, and t is expressed as the wall thickness of the pipeline.

[0027] In a feasible implementation of the first aspect, the calculation formula of the shear load includes:

[0028]

[0029] Among them, M u Expressed as the first section bending moment, M d It is represented as the second section bending moment, and L is represented as the first preset distance.

[0030] In a second aspect, an embodiment of the present application provides a five-dimensional spatial force monitoring system for oil and gas pipelines, wherein the five-dimensional spatial force monitoring system for oil and gas pipelines comprises: at least one processor; a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the method provided in the first aspect.

[0031] The five-dimensional spatial force monitoring system for oil and gas pipelines realizes quantitative monitoring and analysis of the five-dimensional spatial force of the pipeline, including the total bending stress of the cross section, the total bending moment of the cross section and the shear load, by executing the method provided in the first aspect. It can be applied to key nodes of the pipe-surrounding constraint structure including anchor piers, piers, pipe clamps, etc. in the tunnel crossing section, which helps to better understand the stress distribution and load state of the pipeline, and is conducive to supporting further pipeline safety assessments, providing a powerful grip for intelligent management of pipeline maintenance, and ensuring the safety of pipeline operations and energy supply.

[0032] In a third aspect, an embodiment of the present application provides a computer-readable medium having computer program instructions stored thereon, and the computer program instructions can be executed by a processor to implement the method provided in the first aspect.

[0033] The computer program instructions in the computer-readable medium realize the quantitative monitoring and analysis of the five-dimensional spatial forces of the pipeline, including the total bending stress of the cross-section, the total bending moment of the cross-section and the shear load, by implementing the method provided in the first aspect. It can be applied to the key nodes of the pipe-surrounding constraint structure including the anchor piers, piers, pipe clamps, etc. of the tunnel crossing section, which helps to better understand the stress distribution and load state of the pipeline, and is conducive to supporting further pipeline safety assessment, providing a powerful grip for the intelligent management of pipeline maintenance, and ensuring the safety of pipeline operation and energy supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of the structure of a five-dimensional space force monitoring system for oil and gas pipelines provided in an embodiment of the present application;

[0035] Figure 2 A schematic flow chart of a five-dimensional spatial force monitoring method for oil and gas pipelines provided in an embodiment of the present application;

[0036] Figure 3 A schematic diagram of the layout of two adjacent groups of stress-strain cross-section monitoring in a five-dimensional spatial force monitoring method for oil and gas pipelines provided in an embodiment of the present application;

[0037] Figure 4 A schematic diagram of force analysis of a micro-element isolated body of a pipe section in a five-dimensional spatial force monitoring method for an oil and gas pipeline provided in an embodiment of the present application. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be described below in conjunction with the accompanying drawings in the embodiments of the present invention. In the description of the embodiments of the present invention, unless otherwise specified, "multiple" refers to two or more than two. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0039] In addition, in order to facilitate the clear description of the technical solutions of the embodiments of the present invention, in the embodiments of the present invention, the words "first", "second" and the like are used to distinguish the same items or similar items with substantially the same functions and effects. Those skilled in the art will understand that the words "first", "second" and the like do not limit the quantity and execution order, and the words "first", "second" and the like do not necessarily limit the difference. At the same time, in the embodiments of the present invention, the words "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or design. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a concrete way for easy understanding.

[0040] The principles and features of the present application are described below. The examples given are only used to explain the present application and are not used to limit the scope of the present application.

[0041] The embodiment of the present application provides a five-dimensional spatial force monitoring method for oil and gas pipelines, which is applicable to typical scenarios such as landslide sections, mining settlement sections, water damage sections, high fill sections, and crossing sections of oil and gas pipelines. Among them, the five-dimensional spatial force includes axial force, vertical shear force, horizontal shear force, vertical bending moment, and horizontal bending moment, which can achieve a nearly complete state description of the pipeline stress state.

[0042] In some application scenarios, a circumferential constraint is provided on the outer side of the oil and gas pipeline along the circumference of the oil and gas pipeline, that is, perpendicular to the axial direction of the oil and gas pipeline. The circumferential constraint is used to protect the oil and gas pipeline. In order to ensure the normal operation of the oil and gas pipeline, the effectiveness of the circumferential constraint needs to be evaluated.

[0043] Constraints around pipes include pipe clamps, pipe hoops, supports, anchor piers, overlying soil, sand bags, etc.

[0044] In some embodiments, the shear force index of the oil and gas pipeline can be used to evaluate the effectiveness of the constraints around the pipe. The five-dimensional spatial force monitoring method for oil and gas pipelines provided in the embodiment of the present application can provide the shear force index of the oil and gas pipeline, thereby completing the effectiveness evaluation of the constraints around the pipe. The embodiment of the present application takes into account the universality of the constraints around the pipe and can meet the diverse requirements of the evaluation demand scenarios.

[0045] The embodiment of the present application provides a five-dimensional space force monitoring system for oil and gas pipelines, which can execute the five-dimensional space force monitoring method for oil and gas pipelines provided in the embodiment of the present application. Figure 1 A schematic structural diagram of a five-dimensional spatial force monitoring system for oil and gas pipelines provided in an embodiment of the present application.

[0046] like Figure 1 As shown, the five-dimensional space force monitoring system 001 for oil and gas pipelines includes at least one processor 011 and a memory 012 communicatively connected to the at least one processor; wherein the memory 012 stores instructions executable by the at least one processor 011, and the instructions are executed by the at least one processor 011 so that the at least one processor 011 can execute the five-dimensional space force monitoring method for oil and gas pipelines provided in an embodiment of the present application.

[0047] Figure 2 The present invention provides a flow chart of a five-dimensional spatial force monitoring method for oil and gas pipelines. Figure 2 As shown, in some embodiments, the five-dimensional spatial force monitoring method for oil and gas pipelines includes the following steps:

[0048] S1, arranging a plurality of first strain sensors at intervals on a first detection section to obtain a first test result.

[0049] The first detection section is the annular section of the oil and gas pipeline. Figure 3 A schematic diagram of the layout of two adjacent groups of stress-strain cross-section monitoring in a five-dimensional spatial force monitoring method for oil and gas pipelines provided in an embodiment of the present application. Figure 3 As shown, in some embodiments, the first detection section 400a may be a section perpendicular to the pipeline axis.

[0050] By setting up the first strain sensor, the stress state of the oil and gas pipeline can be quantitatively obtained. It is understandable that when the oil and gas pipeline is subjected to external loads, stress and strain will be generated. The collection of stress state data by the first strain sensor can be used to judge the degree of disaster development and the safety status of the pipeline, and support pipeline safety evaluation and management decision-making.

[0051] In some embodiments, the number of multiple first strain sensors is set to three and they are arranged circumferentially along the oil and gas pipeline. The circumferential interval between any two adjacent first strain sensors is greater than or equal to 60°. In one implementation, the circumferential interval between any two adjacent first strain sensors is 120°. In this way, the three first strain sensors are respectively located at the three vertices of an equilateral triangle, that is, in a "pin" shape. It can be understood that the number of arranged first strain sensors is based on the premise of being able to achieve a reliable calculation of the pipe body stress. The maximum value of the number of arranged first strain sensors is not limited in this application.

[0052] Under some working conditions, the number of arranged first strain sensors can be increased.

[0053] The first test result includes the first sectional bending moment, the first axial tensile stress, the first axial compressive stress, and the first tensile stress circumferential angle of the first detection section.

[0054] S2. Arrange multiple second strain sensors at intervals on the second detection section to obtain a second test result.

[0055] The second detection section is an annular section of the oil and gas pipeline. As Figure 3 shown, in some embodiments, the second detection section 400b can be a section perpendicular to the pipeline axis.

[0056] Among them, both the first detection section and the second detection section are on the same side of the pipe circumference constraint structure. The distance between the first detection section and the second detection section is a first preset distance. The second test result includes the second sectional bending moment, the second axial tensile stress, the second axial compressive stress, and the second tensile stress circumferential angle of the second detection section. In one implementation, the first preset distance is less than or equal to 3 m. In another implementation, when the pipeline between the first detection section and the second detection section is suspended or weakly constrained, the first preset distance can be greater than 3 m. Exemplarily, the first preset distance can be greater than 3 m and less than 1 m.

[0057] The function of the second strain sensor is the same as that of the first strain sensor, which will not be elaborated here.

[0058] In some embodiments, the number of multiple second strain sensors is set to three and they are arranged circumferentially along the oil and gas pipeline. The circumferential interval between any two adjacent second strain sensors is greater than or equal to 60°.

[0059] In some embodiments, the circumferential interval between any two adjacent second strain sensors is 120°.

[0060] By executing step S1 and step S2, it is possible to collect stress-strain data based on two adjacent groups of stress-strain monitoring sections within a certain length range of the same pipe section, and quantitatively monitor the lateral and vertical load components of the pipeline, which greatly enriches the connotation of pipeline stress monitoring, strongly supports on-site pipeline safety status evaluation, and ensures pipeline operation safety.

[0061] In order to monitor the five-dimensional stress of the pipeline cross-section more accurately, in some embodiments, multiple groups of adjacent stress and strain monitoring sections within a certain length range of the same pipe section are used as the basis, such as four or six groups. The application does not limit the number of multiple groups of sections.

[0062] It can be understood that the layout and data processing methods of the multiple groups of cross sections are the same as the layout and data processing methods of the two adjacent groups of stress-strain monitoring cross sections.

[0063] S3, obtaining the total bending stress of the cross section based on the first axial tensile stress, the first axial compressive stress, the first tensile stress circumferential angle, the second axial tensile stress, the second axial compressive stress and the second tensile stress circumferential angle.

[0064] In some embodiments, when executing step S3, the five-dimensional spatial force monitoring method for oil and gas pipelines further includes:

[0065] S31, obtaining a maximum axial tensile stress based on the first axial tensile stress and the second axial tensile stress.

[0066] S32, based on the first axial compressive stress and the second axial compressive stress, the maximum axial compressive stress is obtained. Then the calculation formula for the total bending stress of the section includes:

[0067] S b =0.5×(S t +S c );

[0068] Among them, S t Expressed as the maximum axial compressive stress, S c Expressed as the maximum axial tensile stress, S b Expressed as the total bending stress in the cross section.

[0069] S33, determining the maximum tensile stress circumferential angle based on the maximum axial tensile stress.

[0070] Then the horizontal bending stress S h :

[0071] S h =S b × sinθ.

[0072] Where θ is the maximum tensile stress circumference angle, S b Expressed as the total bending stress in the cross section.

[0073] Vertical bending stress S v :

[0074] S v =S b ×cosθ.

[0075] Where θ is the maximum tensile stress circumference angle, S b Expressed as the total bending stress in the cross section.

[0076] S4, based on the total bending stress of the section, obtain the total bending moment of the section.

[0077] In some embodiments, the calculation formula for the total bending moment of the section includes:

[0078]

[0079] Among them, S b It is expressed as the total bending stress of the cross section, D is expressed as the diameter of the outer pipe of the pipeline, and t is expressed as the wall thickness of the pipeline.

[0080] The horizontal bending moment of the section M h :

[0081]

[0082] Vertical bending moment of section M v :

[0083]

[0084] S5, based on the pipe segment microelement, the shear load is obtained through the first section bending moment, the second section bending moment and the first preset distance.

[0085] In some embodiments, the shear load calculation formula includes:

[0086]

[0087] Among them, M u Expressed as the first section bending moment, M d It is represented as the second section bending moment, and L is represented as the first preset distance.

[0088] The calculation formula for shear load is explained below.

[0089] Figure 4 A schematic diagram of the force analysis of a micro-element isolated body of a pipe section in a five-dimensional spatial force monitoring method for an oil and gas pipeline provided in an embodiment of the present application. Figure 4 As shown, in some embodiments, a pipe segment microelement with a length of dx is taken to analyze the differential relationship and incremental relationship between the pipeline load and the internal force, assuming that the shear load concentration qy , the moment load concentration m is a uniformly distributed load. According to the shear balance principle of the isolated body ∑Fy=0, then:

[0090] F Q -(F Q +dF Q )-q y dx=0;

[0091] After sorting, we get:

[0092]

[0093] According to the principle of moment balance of the isolator, ∑M=0,

[0094]

[0095] After sorting, we get:

[0096]

[0097] Considering the actual situation, the uniformly distributed bending moment load of the soil on the pipeline is weak, and the effect of the soil on the pipeline is as follows:

[0098]

[0099] Substitute the first section bending moment M u , the second section bending moment M d and the first preset distance L, then:

[0100]

[0101] In some embodiments, when executing step S5, the five-dimensional spatial force monitoring method for oil and gas pipelines further includes:

[0102] S51, based on the pipe segment microelement, obtain the average shear load through the difference between the first section bending moment and the second section bending moment and the first preset distance.

[0103] When the distance between the first inspection section and the second inspection section on the analyzed pipe section is small, the quotient of the bending moment difference between the two sections and the section distance is the average shear load F on the pipe section.

[0104] S52, based on the cumulative amount of section bending moment, obtaining the absolute shear load borne by the pipeline between the first detection section and the second detection section.

[0105] The cumulative bending moment of the section, that is, the cumulative bending moment of the section since the installation of the pipeline, is also called the absolute bending moment level. When the first section bending rectangle is formed into the cumulative bending moment of the section, when the second section bending rectangle is formed into the cumulative bending moment of the section, the absolute shear load borne by the pipeline between the two sections is obtained by substituting it into the above formula.

[0106] S53, based on the relative bending moment between the first detection section and the second detection section, obtain the relative shear load borne by the pipeline between the first detection section and the second detection section.

[0107] The relative bending moment between the first test section and the second test section, that is, the monitored bending moment values ​​of the two sections since the monitoring began, is also called the relative bending moment level, which can be used to calculate the relative shear load borne by the pipeline between the two sections.

[0108] In some situations, the spatial direction angles of the bending moments on the two sections of the analyzed pipe section may be different. In this case, it is not appropriate to directly bring the bending moment values ​​of the two sections into the formula for solution, which will affect its accuracy.

[0109] To solve this problem, in some embodiments, when executing step S5, the five-dimensional spatial force monitoring method for oil and gas pipelines further includes:

[0110] S501, vector decomposition of the first section bending moment to obtain the first shear force component.

[0111] S502, vector decomposing the bending moment of the second section to obtain a second shear force component.

[0112] S503, directionally synthesizing the first shear force component and the second shear force component to obtain a shear force resultant.

[0113] For example, it is assumed that the bending moment values ​​and the circumferential angles of the maximum bending stress of the two sections are M u 、M d With θ u ,θ d , then there are horizontal bending moments of the first detection section and the second detection section:

[0114] M uh =M u ×sinθ u ;

[0115] M dh =M d ×sinθ d ;

[0116] Then there are vertical bending moments of the first and second detection sections:

[0117] M uv =M u ×cosθ u ;

[0118] M dv =M d ×cosθ d ;

[0119] Then there are the horizontal and shear load components on the pipeline between the first detection section and the second detection section:

[0120]

[0121] Then the shear force is:

[0122] F=(F h 2 +F v 2 ) 0.5 .

[0123] The five-dimensional spatial force monitoring method for oil and gas pipelines provided in the embodiments of the present application quantitatively obtains the external load level and its distribution on the pipeline and the stress state of the pipe body, which has important practical significance for judging the degree of disaster development and the safety status of the pipeline, and is a key link in supporting pipeline safety evaluation and management decision-making.

[0124] The five-dimensional spatial force monitoring method for oil and gas pipelines provided in the embodiments of the present application realizes quantitative monitoring and analysis of the five-dimensional spatial force of the pipeline, including shear load, and can be applied to key nodes including anchor piers, piers, pipe clamps, etc. in tunnel crossing sections, which helps to better understand the stress distribution and load state of the pipeline, and is conducive to supporting further pipeline safety assessments, providing a powerful grip for intelligent management of pipeline maintenance, and ensuring the safety of pipeline operations and energy supply.

[0125] The five-dimensional spatial force monitoring method for oil and gas pipelines provided in the embodiments of the present application focuses on the perception of the overall stress distribution state at the pipeline cross-section level.

[0126] The five-dimensional spatial force monitoring method for oil and gas pipelines provided in the embodiments of the present application solves the problems related to pipeline stress monitoring through the strategy of distributed sensor deployment and overall solution. Local shear force monitoring is difficult to be directly applied to the field of pipeline safety monitoring.

[0127] The five-dimensional spatial force monitoring method for oil and gas pipelines provided in the embodiments of the present application is also applicable to oil and gas pipelines with relatively large geometric dimensions.

[0128] The front-end input of the five-dimensional spatial force monitoring method for oil and gas pipelines provided in the embodiment of the present application is the cross-sectional stress. There is no technical restriction on how to obtain the cross-sectional stress. Therefore, it can be compatible with vibrating-string strain monitoring cross-sections, fiber grating strain monitoring cross-sections, and coaxial cable strain monitoring cross-sections in the same calculation example. This algorithm has good compatibility and good adaptability.

[0129] Based on the same application concept, a five-dimensional space force monitoring system for oil and gas pipelines is also provided in an embodiment of the present application. The method corresponding to the five-dimensional space force monitoring system for oil and gas pipelines may be the five-dimensional space force monitoring method for oil and gas pipelines in the aforementioned embodiment, and its principle of solving the problem is similar to that of the method. The five-dimensional space force monitoring system for oil and gas pipelines provided in an embodiment of the present application includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the methods and / or technical solutions of the aforementioned multiple embodiments of the present application.

[0130] Another embodiment of the present application further provides a computer-readable storage medium having computer program instructions stored thereon, wherein the computer program instructions can be executed by a processor to implement the methods and / or technical solutions of any one or more embodiments of the present application described above.

[0131] Specifically, the present embodiment may adopt any combination of one or more computer-readable media. The computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination thereof. More specific examples (non-exhaustive list) of computer-readable storage media include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in combination with an instruction execution system, device, or device.

[0132] Computer readable signal media may include a data signal propagated in baseband or as part of a carrier wave, which carries a computer readable program code. Such propagated data signals may take a variety of forms, including, but not limited to, electromagnetic signals, optical signals, or any suitable combination of the above. Computer readable signal media may also be any computer readable medium other than a computer readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0133] Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0134] Computer program code for performing the operation of the present application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as an independent software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (e.g., using an Internet service provider to connect through the Internet).

[0135] The secondary flow chart or block diagram in the accompanying drawings shows the possible architecture, function and operation of the equipment, method and computer program product according to various embodiments of the present application. In this regard, each square box in the secondary flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some implementations as replacements, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or the secondary flow chart, and the combination of the square boxes in the block diagram and / or the secondary flow chart can be implemented with a dedicated system for hardware that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0136] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0137] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or page components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0138] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0139] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0140] The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to perform some steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store program codes.

[0141] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

[0142] In addition, it is clear that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. Multiple units or devices stated in a device claim can also be implemented by one unit or device through software or hardware. The words first, second, etc. are used to indicate names, and do not indicate any particular order.

Claims

1. A five-dimensional spatial force monitoring method for oil and gas pipelines, characterized in that: include: Distributing a plurality of first strain sensors at intervals on a first detection section to obtain a first test result; The first detection section is an annular section of the oil and gas pipeline; The first test result includes a first section bending moment, a first axial tensile stress, a first axial compressive stress, and a first tensile stress circumferential angle of the first detection section; A plurality of second strain sensors are arranged at intervals on a second detection section to obtain a second test result; the second detection section is an annular section of the oil and gas pipeline; the first detection section and the second detection section are both located on the same side of the pipe circumferential constraint structure; the distance between the first detection section and the second detection section is a first preset distance; the second test result includes a second section bending moment, a second axial tensile stress, a second axial compressive stress, and a second tensile stress circumferential angle of the second detection section; Obtaining a total bending stress of a cross section based on the first axial tensile stress, the first axial compressive stress, the first tensile stress circumferential angle, the second axial tensile stress, the second axial compressive stress and the second tensile stress circumferential angle; Based on the total bending stress of the cross section, a total bending moment of the cross section is obtained; Based on the pipe segment microelement, the shear load is obtained through the first section bending moment, the second section bending moment and the first preset distance.

2. The five-dimensional spatial force monitoring method for oil and gas pipelines according to claim 1 is characterized in that: When executing the step of obtaining the shear load based on the pipe segment microelement through the first section bending moment, the second section bending moment and the first preset distance, the five-dimensional spatial force monitoring method for oil and gas pipelines further includes: Based on the pipe segment microelement, an average shear load is obtained through the difference between the first section bending moment and the second section bending moment and the first preset distance; Based on the cumulative amount of cross-sectional bending moment, obtaining the absolute shear load borne by the pipeline between the first detection section and the second detection section; Based on the relative bending moment between the first detection section and the second detection section, the relative shear load borne by the pipeline between the first detection section and the second detection section is obtained.

3. The five-dimensional spatial force monitoring method for oil and gas pipelines according to claim 1 or 2 is characterized in that: The number of the plurality of first strain sensors is set to three, and the plurality of first strain sensors are arranged along the circumference of the oil and gas pipeline, and the circumferential interval between any two adjacent first strain sensors is greater than or equal to 60°.

4. The five-dimensional spatial force monitoring method for oil and gas pipelines according to claim 3 is characterized in that: The circumferential interval between any two adjacent first strain sensors is 120°.

5. The five-dimensional spatial force monitoring method for oil and gas pipelines according to claim 1 or 2 is characterized in that: The five-dimensional spatial force monitoring method for oil and gas pipelines also includes: Vector decomposition of the first cross-section bending moment to obtain a first shear force component; Vector decomposition of the second cross-section bending moment to obtain a second shear force component; The first shear force component and the second shear force component are directionally synthesized to obtain a shear force resultant.

6. The five-dimensional spatial force monitoring method for oil and gas pipelines according to claim 1 or 2 is characterized in that: When executing the step of obtaining the total bending stress of the cross section based on the first axial tensile stress, the first axial compressive stress, the first tensile stress circumferential angle, the second axial tensile stress, the second axial compressive stress and the second tensile stress circumferential angle, the five-dimensional spatial force monitoring method for oil and gas pipelines further includes: Based on the first axial tensile stress and the second axial tensile stress, obtaining a maximum axial tensile stress; Based on the first axial compressive stress and the second axial compressive stress, obtaining a maximum axial compressive stress; The calculation formula for the total bending stress of the cross section includes: S b =0.5×(S t +S c ); Among them, S t Expressed as the maximum axial compressive stress, S c Expressed as the maximum axial tensile stress, S b Expressed as the total bending stress in the cross section.

7. The five-dimensional spatial force monitoring method for oil and gas pipelines according to claim 6 is characterized in that: The calculation formula for the total bending moment of the section includes: Among them, S b It is expressed as the total bending stress of the cross section, D is expressed as the diameter of the outer pipe of the pipeline, and t is expressed as the wall thickness of the pipeline.

8. The five-dimensional spatial force monitoring method for oil and gas pipelines according to claim 1 or 2, characterized in that: The calculation formula for the shear load includes: Among them, M u Expressed as the first section bending moment, M d It is represented as the second cross-section bending moment, and L is represented as the first preset distance.

9. A five-dimensional spatial force monitoring system for oil and gas pipelines, characterized in that: include: at least one processor; a memory communicatively coupled to the at least one processor; The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the method according to any one of claims 1 to 8.

10. A computer readable medium having computer program instructions stored thereon, wherein the computer program instructions can be executed by a processor to implement the method according to any one of claims 1 to 8.

Images