Method and device for determining repair tension of casing

Abstract

The invention discloses a method and device for determining casing repair tension, and belongs to the field of oil and gas exploitation. The method comprises the steps that strength information of an oil-string casing in a first well, structural information of a free section of the oil-string casing and position information of a deformation section of the oil-string casing are obtained, the free section comprises the deformation section, and the position information of the deformation section is used for representing the position of the deformation section in the first well; constructing a three-dimensional model of the free section according to the strength information of the oil-string casing, the structure information of the free section and the position information of the deformation section; obtaining a repair relation corresponding to the oil-string casing based on the three-dimensional model of the free section, wherein the repair relation comprises a relation between the repair tension of the oil-string casing and the drift diameter of the oil-string casing; and determining target repair tension according to the expected drift diameter and the repair relation corresponding to the oil-string casing. The repairing effect of the oil-string casing can be guaranteed.

Description

Technical Field

[0001] The present application relates to the field of oil and gas production, and in particular to a method and device for determining casing repair tension. Background Art

[0002] During the drilling process, in order to protect the well wall, it is necessary to lower the surface casing into the well, and use cement slurry to fix the surface casing and the well wall. After the drilling is completed, it is necessary to lower the oil layer casing into the well, and use cement slurry to fix the section of the oil layer casing close to the bottom of the well to the well wall. With the exploitation of groundwater in the oil field area, the formation in the oil field area continues to sink, causing the surface casing to continue to sink. The settlement of the surface casing can easily cause the oil layer casing to be compressed and deformed, affecting the downhole operation. Therefore, the deformed oil layer casing needs to be repaired.

[0003] At present, the oil layer casing is repaired by randomly applying a repair tension to the oil layer casing to stretch the oil layer casing, but the repair effect is poor. For example, if the repair tension applied to the oil layer casing is too large, the oil layer casing is likely to be broken; if the repair tension applied to the oil layer casing is too small, it may be impossible to repair. Summary of the invention

[0004] The present application provides a method and device for determining the casing repair tension, which can ensure the repair effect of the oil layer casing. For example, it can ensure that the repair tension applied to the oil layer casing can repair the deformation of the oil layer casing and ensure that the oil layer casing will not be broken. The technical solution of the present application is as follows.

[0005] In a first aspect, a method for determining casing repair tension is provided, the method comprising:

[0006] Acquire strength information of an oil layer casing in a first well, structural information of a free section of the oil layer casing, and position information of a deformed section of the oil layer casing, wherein the free section includes the deformed section, and the position information of the deformed section is used to characterize the position of the deformed section in the first well;

[0007] Constructing a three-dimensional model of the free section according to the strength information of the oil layer casing, the structural information of the free section and the position information of the deformed section;

[0008] Acquiring a repair relationship corresponding to the oil layer casing based on the three-dimensional model of the free segment, wherein the repair relationship includes a relationship between the repair tension of the oil layer casing and the diameter of the oil layer casing;

[0009] The target repair tension is determined according to the repair relationship between the expected diameter and the oil layer casing. The target repair tension is the repair tension that needs to be applied to the oil layer casing to repair the oil layer casing until the diameter reaches the expected diameter.

[0010] Optionally, the obtaining of the repair relationship corresponding to the oil layer casing based on the three-dimensional model of the free segment includes:

[0011] Acquire a first relationship between the repair tension of the oil layer casing and the stretching length of the oil layer casing based on the three-dimensional stereoscopic model of the free segment;

[0012] Acquire a second relationship between the stretched length of the oil layer casing and the diameter of the oil layer casing based on the three-dimensional model of the free segment;

[0013] The repair relationship includes the first relationship and the second relationship.

[0014] Optionally, the first relationship is: F = c × L d ; The second relationship is: R = a × e (-L / k) +b;

[0015] Wherein, F represents the repair tension of the oil layer casing, L represents the stretching length of the oil layer casing, R represents the diameter of the oil layer casing, e is the base of the natural logarithm function, and a, b, c, d and k are all constants.

[0016] Optionally, the method further comprises: obtaining the corrosion degree of the oil layer casing;

[0017] The method of constructing a three-dimensional stereo model of the free section according to the strength information of the oil layer casing, the structural information of the free section and the position information of the deformation section includes: constructing a three-dimensional stereo model of the free section according to the strength information of the oil layer casing, the structural information of the free section, the position information of the deformation section and the corrosion degree of the oil layer casing.

[0018] Optionally, obtaining the corrosion degree of the oil layer casing includes:

[0019] Obtaining the corrosion rate of the oil layer casing in the first well;

[0020] The corrosion degree of the oil layer casing is determined according to the corrosion rate of the oil layer casing in the first well and the time for which the oil layer casing is lowered into the first well.

[0021] Optionally, the structural information of the free segment includes at least one of the following: the length of the free segment, the shape information of the free segment, the diameter of the free segment, and the wall thickness of the free segment;

[0022] The position information of the deformation segment includes at least one of the following: the top depth of the deformation segment, the bottom depth of the deformation segment;

[0023] The strength information of the oil layer casing includes the steel grade of the oil layer casing.

[0024] In a second aspect, a device for determining casing repair tension is provided, the device comprising:

[0025] A first acquisition module is used to acquire strength information of an oil layer casing in a first well, structural information of a free section of the oil layer casing, and position information of a deformed section of the oil layer casing, wherein the free section includes the deformed section, and the position information of the deformed section is used to characterize the position of the deformed section in the first well;

[0026] A construction module, used to construct a three-dimensional model of the free segment according to the strength information of the oil layer casing, the structural information of the free segment and the position information of the deformed segment;

[0027] A second acquisition module is used to acquire a repair relationship corresponding to the oil layer casing based on the three-dimensional model of the free segment, wherein the repair relationship includes a relationship between the repair tension of the oil layer casing and the diameter of the oil layer casing;

[0028] The determination module is used to determine a target repair tension according to a repair relationship between an expected diameter and the oil layer casing, wherein the target repair tension is a repair tension required to be applied to the oil layer casing to repair the oil layer casing until the diameter reaches the expected diameter.

[0029] Optionally, the second acquisition module is used to:

[0030] Acquire a first relationship between the repair tension of the oil layer casing and the stretching length of the oil layer casing based on the three-dimensional stereoscopic model of the free segment;

[0031] Acquire a second relationship between the stretched length of the oil layer casing and the diameter of the oil layer casing based on the three-dimensional model of the free segment;

[0032] The repair relationship includes the first relationship and the second relationship.

[0033] Optionally, the first relationship is: F = c × L d ; The second relationship is: R = a × e (-L / k) +b;

[0034] Wherein, F represents the repair tension of the oil layer casing, L represents the stretching length of the oil layer casing, R represents the diameter of the oil layer casing, e is the base of the natural logarithm function, and a, b, c, d and k are all constants.

[0035] Optionally, the device further comprises: a third acquisition module, configured to acquire the corrosion degree of the oil layer casing;

[0036] The construction module is used to construct a three-dimensional model of the free section according to the strength information of the oil layer casing, the structural information of the free section, the position information of the deformed section and the corrosion degree of the oil layer casing.

[0037] Optionally, the third acquisition module is used to:

[0038] Obtaining the corrosion rate of the oil layer casing in the first well;

[0039] The corrosion degree of the oil layer casing is determined according to the corrosion rate of the oil layer casing in the first well and the time for which the oil layer casing is lowered into the first well.

[0040] Optionally, the structural information of the free segment includes at least one of the following: the length of the free segment, the shape information of the free segment, the diameter of the free segment, and the wall thickness of the free segment;

[0041] The position information of the deformation segment includes at least one of the following: the top depth of the deformation segment, the bottom depth of the deformation segment;

[0042] The strength information of the oil layer casing includes the steel grade of the oil layer casing.

[0043] In a third aspect, there is provided a device for determining casing repair tension, comprising a memory and a processor;

[0044] The memory is used to store computer programs;

[0045] The processor is configured to execute the computer program stored in the memory so that the device executes the method for determining casing repair tension as provided in the first aspect or any optional implementation of the first aspect.

[0046] In a fourth aspect, a computer device is provided, which may be a smart phone, a tablet computer, a laptop computer, a desktop computer, etc. The computer device includes a device for determining a casing repair tension as provided in the second aspect or any optional implementation of the second aspect, or the computer device includes a device for determining a casing repair tension as provided in the third aspect.

[0047] In a fifth aspect, a computer-readable storage medium is provided, wherein a computer program is stored in the computer-readable storage medium, and when the computer program is executed, the method for determining the casing repair tension provided in the first aspect or any optional manner of the first aspect is implemented.

[0048] In a sixth aspect, a computer program product is provided, the computer program product comprising a program or code, and when the program or code is executed, the method for determining casing repair tension as provided in the first aspect or any optional manner of the first aspect is implemented.

[0049] The beneficial effects of the technical solution provided by this application are:

[0050] The present application provides a method and device for determining casing repair tension, and the method is executed by the device. After the device constructs a three-dimensional stereo model of the free segment based on the acquired strength information of the oil layer casing in the first well, the structural information of the free segment of the oil layer casing, and the position information of the deformed segment of the oil layer casing, the device obtains the corresponding repair relationship of the oil layer casing according to the three-dimensional stereo model of the free segment, and determines the target repair tension that needs to be applied to the oil layer casing to repair the oil layer casing to the expected diameter according to the expected diameter and the repair relationship corresponding to the oil layer casing. Therefore, the target repair tension that needs to be applied to the oil layer casing to repair the oil layer casing to the expected diameter determined by the present application is highly accurate. Compared with randomly applying a repair tension to the oil layer casing to stretch the oil layer casing, stretching the oil layer casing based on the target repair tension determined by the present application has a better effect on repairing the oil layer casing, ensuring that the repair tension applied to the oil layer casing can repair the deformation of the oil layer casing and ensure that the oil layer casing will not be broken. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0052] Figure 1 is a schematic diagram of a first well provided in an embodiment of the present application;

[0053] Figure 2 is a flow chart of a method for determining casing repair tension provided by an embodiment of the present application;

[0054] Figure 3 It is a schematic diagram of a three-dimensional stereoscopic model of a free section of an oil layer casing provided in an embodiment of the present application;

[0055] Figure 4 is a schematic diagram of a first relationship between a repair tension and a stretching length provided in an embodiment of the present application;

[0056] Figure 5 is a schematic diagram of a second relationship between a stretching length and a diameter provided in an embodiment of the present application;

[0057] Figure 6 It is a schematic diagram of a three-dimensional model of a free section of an oil layer casing before and after a repair tension is applied to the three-dimensional model of the free section of the oil layer casing provided by an embodiment of the present application;

[0058] Figure 7 It is a schematic diagram of an oil layer casing of a first well before and after a target repair tension is applied to the oil layer casing of the first well provided by an embodiment of the present application;

[0059] Figure 8 is a schematic diagram of a device for determining casing repair tension provided in an embodiment of the present application;

[0060] Fig. 9 It is a schematic diagram of another device for determining casing repair tension provided in an embodiment of the present application.

[0061] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0062] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0063] During the drilling process, in order to protect the well wall, it is necessary to lower the surface casing into the well, and use cement slurry to fix the surface casing and the well wall. After the drilling is completed, it is necessary to lower the oil layer casing into the well, and use cement slurry to fix the section of the oil layer casing close to the bottom of the well to the well wall. The part of the oil layer casing fixed to the well wall is called the fixed section, and the part of the oil layer casing not fixed to the well wall is called the free section. With the exploitation of groundwater in the oil field area, the strata in the oil field area continue to sink, causing the surface casing to continue to sink. The settlement of the surface casing can easily cause the oil layer casing to be compressed and deformed, affecting downhole operations. Therefore, the deformed oil layer casing needs to be repaired. For example, it has been found that the oil layer casing in many wells in the X oil field has been deformed, affecting downhole operations and oilfield production efficiency. For example, Figure 1It is a schematic diagram of a first well, in which a surface casing 120 and an oil layer casing 110 are lowered, and the oil layer casing 110 is lowered into the first well through the surface casing 120, and the oil layer casing 110 is located in the inner cavity of the surface casing 120, and the entire surface casing 120 is fixed to the well wall through cement slurry, a section of the oil layer casing 110 close to the bottom of the well is fixed to the well wall, and the rest of the section is not fixed to the well wall, the section of the oil layer casing 110 fixed to the well wall is a fixed section 111, and the section not fixed to the well wall is a free section 112. When the surface casing 120 sinks with the formation, the surface casing 120 will apply pressure to the oil layer casing 110, causing the oil layer casing 110 to be compressed and deformed, especially causing the free section 112 to be compressed and deformed, and the compression deformation of the oil layer casing 110 affects the downhole operation and the oilfield production efficiency, so it is necessary to repair the deformed oil layer casing.

[0064] At present, the oil layer casing is repaired by randomly applying a repair tension to the oil layer casing to stretch the oil layer casing, but the repair effect is poor. For example, if the repair tension applied to the oil layer casing is too large, it is easy to break the oil layer casing; if the repair tension applied to the oil layer casing is too small, it may not be repaired. Figure 1 For example, in order to prevent the oil layer casing 110 from being compressed and deformed and affecting the downhole operation, the oil layer casing 110 is repaired by randomly applying a repair tension to the oil layer casing 110. However, if the repair tension applied to the oil layer casing 110 is too large, the oil layer casing 110 is easily broken; if the repair tension applied to the oil layer casing 110 is too small, the oil layer casing 110 may not be repaired, so the repair effect is poor.

[0065] The embodiment of the present application provides a method and device for determining the casing repair tension, and the method is executed by the device. After the device constructs a three-dimensional stereoscopic model of the free segment based on the acquired strength information of the oil layer casing in the first well, the structural information of the free segment of the oil layer casing, and the position information of the deformed segment of the oil layer casing, it obtains the repair relationship corresponding to the oil layer casing based on the three-dimensional stereoscopic model of the free segment, and determines the target repair tension that needs to be applied to the oil layer casing to repair the oil layer casing to the expected diameter based on the expected diameter and the repair relationship corresponding to the oil layer casing. That is, the device determines the target repair tension that needs to be applied to the oil layer casing to repair the oil layer casing to the expected diameter based on the strength information of the oil layer casing, the structural information of the free segment of the oil layer casing, and the position information of the deformed segment of the oil layer casing. The position information determines the target repair tension that needs to be applied to the oil layer casing to repair the oil layer casing to the expected diameter. Therefore, the target repair tension that needs to be applied to the oil layer casing to repair the oil layer casing to the expected diameter determined in the embodiment of the present application is more accurate. Compared with randomly applying a repair tension to the oil layer casing to stretch the oil layer casing, stretching the oil layer casing with the target repair tension determined in the embodiment of the present application has a better effect of repairing the oil layer casing, ensuring that the repair tension applied to the oil layer casing can repair the deformation of the oil layer casing and ensure that the oil layer casing will not be broken.

[0066] The technical solution of the present application is introduced below, and first the method embodiment of the present application is introduced.

[0067] Please refer to Figure 2 , which shows a flow chart of a method for determining casing repair tension provided by an embodiment of the present application. The method is executed by a device for determining casing repair tension (hereinafter referred to as a repair tension determination device). Figure 2 The method includes the following steps S201 to S204.

[0068] S201. Acquire strength information of an oil layer casing in a first well, structural information of a free section of the oil layer casing, and position information of a deformation section of the oil layer casing, wherein the free section includes the deformation section, and the position information of the deformation section is used to characterize the position of the deformation section in the first well.

[0069] The structural information of the free section of the oil layer casing includes at least one of the following: the length of the free section, the shape information of the free section, the diameter of the free section, and the wall thickness of the free section. The shape information of the free section is used to characterize the shape of the free section. The shape information of the free section can be an image of the free section or description data for describing the shape of the free section. The diameter of the free section is the maximum width of an object that can pass through the inner cavity of the free section. The wall thickness of the free section is also the wall thickness of the oil layer casing.

[0070] The oil layer casing includes at least one deformation segment, and the position information of each deformation segment in the at least one deformation segment includes at least one of the following: the top depth of the deformation segment and the bottom depth of the deformation segment. The top depth of any deformation segment is the distance between the end of the deformation segment close to the wellhead of the first well and the wellhead, and the bottom depth of any deformation segment is the distance between the end of the deformation segment far from the wellhead of the first well and the wellhead.

[0071] Among them, the strength information of the oil layer casing includes the steel grade of the oil layer casing. The steel grade of the oil layer casing can be H40, J55, K55, N80, L80, C90, T95, C95, P110 or Q125, etc. The letters "H", "J", "K", "N", etc. in the steel grade represent the yield strength of the steel of the steel grade (that is, the bending limit of the steel). The later the order of the letters in the steel grade in the alphabet, the greater the yield strength of the steel of the steel grade, and the earlier the order of the letters in the steel grade in the alphabet, the smaller the yield strength of the steel of the steel grade, and the numbers in the steel grade represent the minimum yield strength of the steel of the steel grade.

[0072] In one embodiment, the repair tension determination device includes a human-computer interaction component, and the staff inputs the strength information of the oil layer casing, the structural information of the free section of the oil layer casing, and the position information of the deformation section of the oil layer casing to the repair tension determination device through the human-computer interaction component, and the repair tension determination device obtains the strength information of the oil layer casing, the structural information of the free section of the oil layer casing, and the position information of the deformation section of the oil layer casing input by the staff. For example, the well logging data is obtained by logging the first well through a multi-arm logging instrument, and the staff obtains the structural information of the free section of the oil layer casing and the position information of the deformation section of the oil layer casing by analyzing the logging data. The staff determines the strength information of the oil layer casing in the first well through the facility data of the first well, and the facility data of the first well records the information of various facilities such as casing, oil pipe, etc. in the first well, and the facility data of the first well includes the strength information of the oil layer casing in the first well. Among them, the human-computer interaction component includes but is not limited to a keyboard, a mouse, a touch screen, etc.

[0073] In another embodiment, the repair tension determination device is connected to a multi-arm logging instrument, for example, by a cable connection, the multi-arm logging instrument performs logging on the first well to obtain logging data, and transmits the logging data to the repair tension determination device, the repair tension determination device analyzes the logging data to obtain structural information of the free section of the oil layer casing in the first well and position information of the deformed section of the oil layer casing. The staff inputs the strength information of the oil layer casing to the repair tension determination device through the human-computer interaction component.

[0074] S202. Construct a three-dimensional model of the free section of the oil layer casing according to the strength information of the oil layer casing, the structural information of the free section of the oil layer casing and the position information of the deformed section of the oil layer casing.

[0075] In an optional embodiment, the repair tension determination device uses finite element software to construct a three-dimensional stereoscopic model of the free section of the oil layer casing according to the strength information of the oil layer casing, the structural information of the free section of the oil layer casing, and the position information of the deformed section of the oil layer casing. In a specific embodiment, the repair tension determination device selects a basic model for modeling the free section of the oil layer casing in the finite element software, and the repair tension determination device inputs the strength information of the oil layer casing, the structural information of the free section of the oil layer casing, and the position information of the deformed section of the oil layer casing into the finite element software, so that the finite element software models the free section of the oil layer casing according to the strength information of the oil layer casing, the structural information of the free section of the oil layer casing, the position information of the deformed section of the oil layer casing, and the basic model to obtain a three-dimensional stereoscopic model of the free section of the oil layer casing. Optionally, the finite element software can be ABAQUS software.

[0076] Affected by the environment in the first well, the oil layer casing in the first well may be corroded, and the longer the oil layer casing is in the first well, the faster the corrosion rate and the greater the corrosion degree. When the repair tension determination device constructs the three-dimensional stereo model of the free section of the oil layer casing, the corrosion degree of the oil layer casing can also be considered. In an optional embodiment, the repair tension determination device obtains the corrosion degree of the oil layer casing, and the repair tension determination device constructs the three-dimensional stereo model of the free section of the oil layer casing according to the strength information of the oil layer casing, the structural information of the free section of the oil layer casing, the position information of the deformed section of the oil layer casing, and the corrosion degree of the oil layer casing. In a specific embodiment, the repair tension determination device uses finite element software to construct the three-dimensional stereo model of the free section of the oil layer casing according to the strength information of the oil layer casing, the structural information of the free section of the oil layer casing, the position information of the deformed section of the oil layer casing, and the corrosion degree of the oil layer casing. Specifically, the repair tension determination device inputs the strength information of the oil layer casing, the structural information of the free section of the oil layer casing, the position information of the deformed section of the oil layer casing and the corrosion degree of the oil layer casing into the finite element software, so that the finite element software constructs a three-dimensional model of the free section of the oil layer casing according to the strength information of the oil layer casing, the structural information of the free section of the oil layer casing, the position information of the deformed section of the oil layer casing, the corrosion degree of the oil layer casing and the basic model used to model the free section of the oil layer casing.

[0077] In an optional embodiment, the repair tension determination device obtains the corrosion rate of the oil layer casing in the first well, and the repair tension determination device determines the corrosion degree of the oil layer casing according to the corrosion rate of the oil layer casing in the first well and the time the oil layer casing is lowered into the first well. In a specific embodiment, the repair tension determination device obtains the corrosion test data corresponding to the oil layer casing, and the repair tension determination device obtains the corrosion rate of the oil layer casing in the first well according to the corrosion test data corresponding to the oil layer casing, and the repair tension determination device determines the corrosion degree of the oil layer casing by multiplying the time the oil layer casing is lowered into the first well and the corrosion rate of the oil layer casing. Among them, the corrosion rate of the oil layer casing in the first well is the thickness of the oil layer casing wall corroded per unit time, and the corrosion degree of the oil layer casing is the thickness of the oil layer casing wall corroded.

[0078] In an optional embodiment, the repair tension determination device includes a human-machine interaction component, and the staff inputs the corrosion test data corresponding to the oil layer casing to the repair tension determination device through the human-machine interaction component, and the repair tension determination device obtains the corrosion test data corresponding to the oil layer casing input by the staff. Wherein, the human-machine interaction component includes but is not limited to a keyboard, a mouse, a touch screen, etc. The corrosion test data corresponding to the oil layer casing is obtained by performing a corrosion test on a plurality of hanging pieces corresponding to the oil layer casing, and the material of the plurality of hanging pieces is the same as the material of the oil layer casing. The corrosion test data corresponding to the oil layer casing includes the corrosion test data of the plurality of groups of hanging pieces, and the corrosion test data of each hanging piece includes the corrosion weight loss of the hanging piece and the corrosion time corresponding to the corrosion weight loss (that is, the corrosion time of the hanging piece). The corrosion weight loss of each hanging piece is the difference between the weight of the hanging piece before and after being corroded, specifically, the difference between the weight of the hanging piece before the hanging piece is placed in the target corrosion environment and the weight of the hanging piece after the corresponding corrosion time of the hanging piece is placed in the target corrosion environment. The target corrosion environment is an experimental environment created according to the corrosion environment in the first well. The repair tension determination device obtains the corrosion rate of the oil layer casing in the first well according to the corrosion experimental data corresponding to the oil layer casing, including: the repair tension determination device determines the corrosion rate of each hanger according to the corrosion weight loss of each hanger in the multiple hangers and the corrosion time of each hanger, and the corrosion rate of each hanger corresponds to the corrosion time of each hanger; the repair tension determination device fits the corrosion rates of the multiple hangers to obtain a short-term corrosion rate curve; the repair tension determination device obtains a long-term corrosion rate curve according to the short-term corrosion rate curve; the repair tension determination device determines the corrosion rate of the oil layer casing in the first well according to the long-term corrosion rate curve and the time the oil layer casing is lowered into the first well. Specifically, the repair tension determination device determines the corrosion rate corresponding to the time the oil layer casing is lowered into the first well on the long-term corrosion rate curve as the corrosion rate of the oil layer casing in the first well.

[0079] Among them, the short-term corrosion rate curve is a curve of corrosion duration and corresponding corrosion rate, and the short-term corrosion rate curve is used to characterize the relationship between corrosion duration and corrosion rate. The unit scale of corrosion duration in the short-term corrosion rate curve is shorter, such as days. The long-term corrosion rate curve is a curve of corrosion duration and corrosion rate. The long-term corrosion rate is used to characterize the relationship between corrosion duration and corrosion rate. The unit scale of corrosion duration in the short-term corrosion rate curve is longer, such as years. Optionally, the repair tension determination device obtains a short-term corrosion rate curve by fitting the corrosion rates of the multiple hanging pieces and the corrosion durations corresponding to the corrosion rates of the multiple hanging pieces by the least squares method. The repair tension determination device obtains a long-term corrosion rate curve based on the short-term corrosion rate curve and the NACE0995 standard. For example, the short-term corrosion rate curve is V 1 =g×X h , V 1 represents the corrosion rate, X represents the corrosion time, and g and h are constants.

[0080] The repair tension determination device determines the corrosion rate of each hanging piece according to the weight loss of each hanging piece in the plurality of hanging pieces and the corrosion time of each hanging piece, including: the repair tension determination device determines the corrosion rate of each hanging piece according to the weight loss of each hanging piece in the plurality of hanging pieces, the corrosion time of each hanging piece and the corrosion rate formula. The corrosion rate formula is: V 2 =W / (P×S×T), V 2 represents the corrosion rate, W represents the weight loss due to corrosion of the hanger, P represents the density of the hanger, S represents the surface area of ​​the hanger, and T represents the corrosion time of the hanger. For example, for each hanger among the multiple hangers, the repair tension determination device substitutes the weight loss due to corrosion of the hanger, the density of the hanger, the surface area of ​​the hanger, and the corrosion time of the hanger into the above corrosion rate formula to calculate the corrosion rate of the hanger.

[0081] In an optional embodiment, an electromagnetic flaw detector is lowered into the first well to obtain corrosion environment information in the first well, and the corrosion environment information in the first well includes the ambient temperature in the first well, the gas partial pressure in the first well, the liquid particle concentration in the first well, etc. A target corrosion environment is created according to the corrosion environment information in the first well, and multiple hanging pieces corresponding to the oil layer casing in the first well are obtained, and a corrosion time is set for each hanging piece. Each hanging piece of the multiple hanging pieces is set in the target corrosion environment, and the corrosion weight loss of each hanging piece is obtained according to the corrosion time set in advance for each hanging piece, so as to obtain the corrosion experimental data of each hanging piece. In a specific embodiment, for each of the multiple hangers: before the hanger is set in the target corrosion environment, the hanger is measured to obtain the mass of the hanger; after the hanger is set in the target corrosion environment, a countdown is performed according to the corrosion time set for the hanger, and at the end of the countdown (that is, when the time the hanger has been in the target corrosion environment reaches the corrosion time set for the hanger), the hanger is taken out of the target corrosion environment and measured to obtain the mass of the hanger; the corrosion weight loss of the hanger is determined based on the mass of the hanger before the hanger is set in the target corrosion environment and the mass of the hanger after the hanger has been corroded in the target corrosion environment for a corresponding corrosion time.

[0082] After the repair tension determination device constructs a three-dimensional model of the free section of the oil layer casing, the performance of the three-dimensional model can be verified. In one embodiment, the repair tension determination device stretches the three-dimensional model according to the test tension, and the repair tension determination device determines the stretched length of the three-dimensional model under the test tension and the diameter of the three-dimensional model under the test tension, and the repair tension determination device obtains the stretched length of the oil layer casing under the test tension and the diameter of the oil layer casing under the test tension, and the repair tension determination device verifies the performance of the three-dimensional model according to the stretched length of the three-dimensional model under the test tension, the diameter of the three-dimensional model under the test tension, the stretched length of the oil layer casing under the test tension, and the diameter of the oil layer casing under the test tension. In a specific embodiment,

[0083] The repair tension determination device determines a first difference between the stretched length of the three-dimensional model under the test tension and the stretched length of the oil layer casing under the test tension, and determines a first percentage value of the first difference and the stretched length of the oil layer casing under the test tension, and the repair tension determination device determines whether the first percentage value is less than a first threshold value; and the repair tension determination device determines a second difference between the diameter of the three-dimensional model under the test tension and the diameter of the oil layer casing under the test tension, and determines a second percentage value of the second difference and the diameter of the oil layer casing under the test tension, and the repair tension determination device determines whether the second percentage value is less than a second threshold value. When the first percentage value is less than the first threshold value and the second percentage value is less than the second threshold value, the repair tension determination device determines that the performance of the three-dimensional model is good, and the three-dimensional model can simulate the oil layer casing well; when the first percentage value is not less than the first threshold value and / or the second percentage value is not less than the second threshold value, the repair tension determination device determines that the performance of the three-dimensional model is poor, and the three-dimensional model cannot simulate the oil layer casing well.

[0084] S203. Obtaining a repair relationship corresponding to the oil layer casing based on the three-dimensional stereoscopic model of the free section of the oil layer casing, the repair relationship including a relationship between the repair tension of the oil layer casing and the diameter of the oil layer casing.

[0085] In an optional embodiment, the repair tension determination device obtains a first relationship between the repair tension of the oil layer casing and the stretched length of the oil layer casing based on the three-dimensional stereoscopic model of the free section of the oil layer casing, and the repair tension determination device obtains a second relationship between the stretched length of the oil layer casing and the diameter of the oil layer casing based on the three-dimensional stereoscopic model of the free section of the oil layer casing. The repair relationship corresponding to the oil layer casing includes the first relationship and the second relationship. Among them, the first relationship is: F = c × L d , the second relationship is: R = a × e (-L / k)+b. F represents the repair tension of the oil layer casing, L represents the stretching length of the oil layer casing, R represents the diameter of the oil layer casing, e represents the base of the natural logarithm function, and a, b, c, d and k are all constants. For example, the value range of a is [-31.96312-0.71249, -31.96312+0.71249], and a can be any value in [-31.96312-0.71249, -31.96312+0.71249]; the value range of b is [128.19182-0.77174, 128.19182+0.77174], and b can be [128. 19182-0.77174, 128.19182+0.77174], c is 29964, d is 0.5392, the value range of k is [434.02443-17.11499, 434.02443+17.11499], and k can be any value in [434.02443-17.11499, 434.02443+17.11499]. That is, the value range of a is [-32.67561, -32.25063], and a can be any value in [-32.67561, -32.25063]; the value range of b is [127.42008, 128.96356], and b can be any value in [127.42008, 128.96356], c is 29964, d is 0.5392, and the value range of k is [416.90944, 451.13942], and k can be any value in [416.90944, 451.13942].

[0086] In an optional embodiment, the repair tension determination device obtains a repair tension set, for example, the repair tension determination device obtains the repair tension set input by the user, or the repair tension determination device generates the repair tension set, and the repair tension set includes multiple repair tensions. The repair tension determination device obtains multiple stretching lengths corresponding to the multiple repair tensions based on the three-dimensional stereoscopic model of the free section of the oil layer casing and the multiple repair tensions, and the repair tension determination device obtains multiple paths corresponding to the multiple stretching lengths based on the three-dimensional stereoscopic model of the free section of the oil layer casing and the multiple stretching lengths. The repair tension determination device performs curve fitting based on the multiple repair tensions and the multiple stretching lengths to obtain a first curve, and obtains a first relationship for characterizing the first curve, the first curve is a relationship curve between the repair tension and the stretching length. The repair tension determination device performs curve fitting based on the multiple stretching lengths and the multiple paths to obtain a second curve, and obtains a second relationship for characterizing the second curve, the second curve is a relationship curve between the stretching length and the path. Optionally, the repair tension determination device fits the multiple repair tensions and the multiple stretching lengths by the least squares method to obtain a first curve, and the repair tension determination device fits the multiple stretching lengths and the multiple paths by the least squares method to obtain a second curve.

[0087] In an optional embodiment, for each repair tension in the repair tension set: the repair tension determination device stretches the three-dimensional model of the free section of the oil layer casing according to the repair tension, and the repair tension determination device determines the stretched length of the oil layer casing and the diameter of the oil layer casing according to the stretched three-dimensional model, and the stretched length of the oil layer casing is also the stretched length corresponding to the repair tension, and the diameter of the oil layer casing is the diameter corresponding to the stretched length. In one example, the repair tension determination device determines the stretched length and diameter of the three-dimensional model at the repair tension, and the repair tension determination device determines the stretched length of the three-dimensional model at the repair tension as the stretched length of the oil layer casing, and the repair tension determination device determines the diameter of the three-dimensional model at the repair tension as the diameter of the oil layer casing.

[0088] S204. Determine a target repair tension according to the repair relationship between the expected diameter and the oil layer casing. The target repair tension is the repair tension that needs to be applied to the oil layer casing to repair the oil layer casing until the diameter reaches the expected diameter.

[0089] In an optional embodiment, the repair relationship corresponding to the oil layer casing includes a first relationship and a second relationship, the first relationship is the relationship between the repair tension of the oil layer casing and the stretching length of the oil layer casing, the second relationship is the relationship between the stretching length of the oil layer casing and the diameter of the oil layer casing, the repair tension determination device determines the stretching length of the oil layer casing according to the expected diameter of the oil layer casing and the second relationship, and the repair tension determination device determines the target repair tension that needs to be applied to the oil layer casing to repair the oil layer casing to the diameter reaching the expected diameter according to the stretching length of the oil layer casing and the first relationship. In a specific embodiment, the repair tension determination device substitutes the expected diameter of the oil layer casing into the second relationship to calculate the stretching length corresponding to the expected diameter, and the repair tension determination device substitutes the stretching length corresponding to the expected diameter into the first relationship to calculate the target repair tension.

[0090] In summary, the method for determining the casing repair tension provided in the embodiment of the present application is that the repair tension determination device constructs a three-dimensional stereo model of the free segment according to the acquired strength information of the oil layer casing in the first well, the structural information of the free segment of the oil layer casing and the position information of the deformed segment of the oil layer casing, and then obtains the repair relationship corresponding to the oil layer casing according to the three-dimensional stereo model of the free segment, and determines the target repair tension that needs to be applied to the oil layer casing to repair the oil layer casing to the expected diameter according to the expected diameter and the repair relationship corresponding to the oil layer casing. That is, the device determines the target repair tension that needs to be applied to the oil layer casing to repair the oil layer casing to the expected diameter according to the strength information of the oil layer casing, the free segment of the oil layer casing and the position information of the deformed segment of the oil layer casing. The target repair tension required to be applied to the oil layer casing to repair the oil layer casing to the expected diameter is determined based on the structural information of the oil layer casing and the position information of the deformed section of the oil layer casing. Therefore, the target repair tension required to be applied to the oil layer casing to repair the oil layer casing to the expected diameter determined in the embodiment of the present application is more accurate. Compared with randomly applying a repair tension to the oil layer casing to stretch the oil layer casing, stretching the oil layer casing with the target repair tension determined in the embodiment of the present application has a better effect on repairing the oil layer casing, ensuring that the repair tension applied to the oil layer casing can repair the deformation of the oil layer casing and ensure that the oil layer casing will not be broken.

[0091] In order to facilitate understanding of the technical solution of the present application, the technical solution of the present application is introduced below with an example.

[0092] The steel grade of the oil layer casing in the first well is N80. The length of the free section of the oil layer casing is Q, the diameter of the free section is Y, the wall thickness of the free section is Z, and the free section includes three deformation sections, namely deformation section 1, deformation section 2 and deformation section 3. The top depth of deformation section 1 is H. 11 , the bottom depth of deformation section 1 is H 12 , the top depth of deformation section 2 is H 21 , the bottom depth of deformation section 2 is H 22, the top depth of deformation section 3 is H 31 , the bottom depth of deformation section 3 is H 32 The repair tension determination device inputs the steel grade of the oil layer casing, the length of the free section of the oil layer casing, the diameter of the free section, the wall thickness of the free section, the top depth of the deformation section 1, the bottom depth of the deformation section 1, the top depth of the deformation section 2, the bottom depth of the deformation section 2, the top depth of the deformation section 3, and the bottom depth of the deformation section 3 into the finite element software. The finite element software constructs a three-dimensional model of the free section of the oil layer casing based on this information and the basic model for modeling the free section of the oil layer casing. The three-dimensional model of the free section of the oil layer casing constructed by the finite element software is as shown in FIG. Figure 3 shown.

[0093] Repair the tension determination device to obtain Figure 3 The performance of the three-dimensional model is then verified. For example, the repair tension determination device uses a 40-ton test tension to stretch the three-dimensional model. The structure of the three-dimensional model before and after stretching is as follows: Figure 6 As shown, the repair tension determination device determines the stretching length of the three-dimensional model under the test tension and the diameter of the three-dimensional model under the test tension, wherein 1 ton is equal to 9800 Newtons, and the test tension of 40 tons is 392000 Newtons. The oil layer casing is stretched by the test tension of 40 tons, and the structure of the free section of the oil layer casing before and after stretching is as follows: Figure 7As shown, the repair tension determination device obtains the tensile length of the oil layer casing under the test tension and the diameter of the oil layer casing under the test tension. For example, the tensile length of the three-dimensional model under the test tension is 13.7 cm, the diameter of the three-dimensional model under the test tension is 102.73 mm, the tensile length of the oil layer casing under the test tension is 15 cm, and the diameter of the oil layer casing under the test tension is 105.61 mm. The repair tension determination device determines that the first difference between the tensile length of the three-dimensional model under the test tension and the tensile length of the oil layer casing under the test tension is 15-13.7=1.3 cm, and the repair tension determination device determines that the first difference and the first percentage value of the tensile length of the oil layer casing under the test tension are 1.3 / 15=8.6%. The repair tension determination device determines that the second difference between the diameter of the three-dimensional model under the test tension and the diameter of the oil layer casing under the test tension is 105.61-102.73=2.88 mm, and the repair tension determination device determines that the second difference and the second percentage value of the diameter of the oil layer casing under the test tension are 2.88 / 105.61=2.8%. The repair tension determination device determines whether the first percentage value is less than the first threshold value, and determines whether the second percentage value is less than the second threshold value. For example, the first threshold value is 10% and the second threshold value is 5%. Since the first percentage value is less than the first threshold value and the second percentage value is less than the second threshold value, the repair tension determination device determines that the performance of the three-dimensional model is good, and the oil layer casing can be better simulated.

[0094] After the repair tension determination device obtains the three-dimensional stereoscopic model of the free section of the oil layer casing and determines that the three-dimensional stereoscopic model can better simulate the oil layer casing, the repair tension determination device obtains the repair relationship corresponding to the oil layer casing based on the three-dimensional stereoscopic model, and the repair relationship includes the following: Figure 4 The first relationship shown and Figure 5 The second relationship shown, the repair tension determination device determines the target repair tension that needs to be applied to the oil layer casing to repair the oil layer casing to the expected diameter according to the expected diameter of the oil layer casing and the repair relationship corresponding to the oil layer casing. The target repair tension is used to guide the staff to stretch the oil layer casing according to the target repair tension to repair the diameter of the oil layer casing to the expected diameter.

[0095] The following is an embodiment of the device of the present application, which can be used to execute the embodiment of the method of the present application. For details not disclosed in the embodiment of the device of the present application, please refer to the embodiment of the method of the present application.

[0096] Please refer to Figure 8 , which shows a schematic diagram of a device 800 for determining casing repair tension provided by an embodiment of the present application. The device 800 is used to perform Figure 1 The method provided in the embodiment shown. Figure 8 As shown, the apparatus 800 includes a first acquisition module 801 , a construction module 802 , a second acquisition module 803 and a determination module 804 .

[0097] The first acquisition module 801 is used to obtain the strength information of the oil layer casing in the first well, the structural information of the free section of the oil layer casing and the position information of the deformation section of the oil layer casing, the free section includes the deformation section, and the position information of the deformation section is used to characterize the position of the deformation section in the first well; please refer to the relevant description in the above step S201 for the functional implementation of the first acquisition module 801.

[0098] The construction module 802 is used to construct a three-dimensional model of the free segment according to the strength information of the oil layer casing, the structural information of the free segment and the position information of the deformed segment. For the implementation of the functions of the construction module 802, please refer to the relevant description in the above step S202.

[0099] The second acquisition module 803 is used to obtain the repair relationship corresponding to the oil layer casing based on the three-dimensional model of the free segment, and the repair relationship includes the relationship between the repair tension of the oil layer casing and the diameter of the oil layer casing; for the functional implementation of the second acquisition module 803, please refer to the relevant description in the above step S203.

[0100] The determination module 804 is used to determine the target repair tension according to the repair relationship between the expected diameter and the oil layer casing, and the target repair tension is the repair tension that needs to be applied to the oil layer casing to repair the oil layer casing until the diameter reaches the expected diameter. For the implementation of the function of the determination module 804, please refer to the relevant description in the above step S204.

[0101] Optionally, the second acquisition module 803 is used to: obtain a first relationship between the repair tension of the oil layer casing and the stretching length of the oil layer casing based on the three-dimensional stereo model of the free segment; obtain a second relationship between the stretching length of the oil layer casing and the diameter of the oil layer casing based on the three-dimensional stereo model of the free segment; wherein the repair relationship includes the first relationship and the second relationship.

[0102] Optionally, the first relationship is: F = c × L d ; The second relationship is: R = a × e (-L / k) +b; wherein, F represents the repair tension of the oil layer casing, L represents the tensile length of the oil layer casing, R represents the diameter of the oil layer casing, e is the base of the natural logarithm function, and a, b, c, d and k are all constants.

[0103] Optionally, the device 800 further includes: a third acquisition module 805, which is used to acquire the corrosion degree of the oil layer casing; for the implementation of the functions of the third acquisition module 805, please refer to the relevant description in the above step S202.

[0104] The construction module 802 is used to construct a three-dimensional model of the free section according to the strength information of the oil layer casing, the structural information of the free section, the position information of the deformed section and the corrosion degree of the oil layer casing.

[0105] Optionally, the third acquisition module 805 is used to: obtain the corrosion rate of the oil layer casing in the first well; and determine the corrosion degree of the oil layer casing according to the corrosion rate of the oil layer casing in the first well and the time the oil layer casing is lowered into the first well.

[0106] Optionally, the structural information of the free segment includes at least one of the following: the length of the free segment, the shape information of the free segment, the diameter of the free segment, and the wall thickness of the free segment; the position information of the deformation segment includes at least one of the following: the top depth of the deformation segment, the bottom depth of the deformation segment; the strength information of the oil layer casing includes the steel grade of the oil layer casing.

[0107] To summarize, the technical solution provided by the embodiment of the present application is that the device for determining the casing repair tension constructs a three-dimensional stereoscopic model of the free segment according to the acquired strength information of the oil layer casing in the first well, the structural information of the free segment of the oil layer casing and the position information of the deformed segment of the oil layer casing, and then obtains the corresponding repair relationship of the oil layer casing according to the three-dimensional stereoscopic model of the free segment, and determines the target repair tension that needs to be applied to the oil layer casing to repair the oil layer casing to the expected diameter according to the expected diameter and the repair relationship corresponding to the oil layer casing. Therefore, the target repair tension that needs to be applied to the oil layer casing to repair the oil layer casing to the expected diameter determined by the embodiment of the present application is more accurate, and compared with randomly applying a repair tension to the oil layer casing to stretch the oil layer casing, stretching the oil layer casing based on the target repair tension determined by the embodiment of the present application has a better effect on repairing the oil layer casing, ensuring that the repair tension applied to the oil layer casing can repair the deformation of the oil layer casing and ensure that the oil layer casing will not be broken.

[0108] An embodiment of the present application provides a device for determining casing repair tension, comprising a memory and a processor; the memory is used to store a computer program; the processor is used to execute the computer program stored in the memory so that the device executes the method for determining casing repair tension provided in the above embodiment.

[0109] As an example, see Fig. 9, which shows a schematic diagram of another device 900 for determining casing repair tension provided by an embodiment of the present application. The device 900 is a computer device or a functional component deployed in a computer device. The device 900 can be a smart phone, a tablet computer, a laptop computer or a desktop computer, etc. The device 900 is used to perform Figure 2 The method provided by the illustrated embodiment.

[0110] Typically, the device 900 includes a processor 901 and a memory 902 .

[0111] The processor 901 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 901 may be implemented in at least one hardware form of digital signal processing (DSP), field programmable gate array (FPGA), and programmable logic array (PLA). The processor 901 may include but is not limited to a central processing unit (CPU). In some embodiments, the processor 901 may be integrated with a graphics processing unit (GPU), which is responsible for rendering and drawing the content to be displayed on the display screen. The processor 901 may also include an artificial intelligence (AI) processor to handle computing operations related to machine learning.

[0112] The memory 902 includes one or more computer-readable storage media, which may be non-transitory. The memory 902 may also include a high-speed random access memory and a non-volatile memory, such as one or more disk storage devices and flash memory storage devices. In some embodiments, the non-transitory computer-readable storage medium in the memory 902 is used to store at least one instruction, which is executed by the processor 901 to implement the method for determining the casing repair tension provided in the embodiment of the present application.

[0113] In some embodiments, the apparatus 900 may further optionally include: a peripheral device interface 903 and at least one peripheral device. The processor 901, the memory 902 and the peripheral device interface 903 may be connected via a bus or a signal line. Each peripheral device may be connected to the peripheral device interface 903 via a bus, a signal line or a circuit board. The peripheral device may include: at least one of a radio frequency circuit 904, a display screen 905, a camera 906, an audio circuit 909, a positioning component 908 and a power supply 909.

[0114] The peripheral device interface 903 may be used to connect at least one peripheral device related to input / output (I / O) to the processor 901 and the memory 902. In some embodiments, the processor 901, the memory 902, and the peripheral device interface 903 are integrated on the same chip or circuit board; in some embodiments, any one or two of the processor 901, the memory 902, and the peripheral device interface 903 may be implemented on a separate chip or circuit board, which is not limited in this embodiment.

[0115] The radio frequency circuit 904 is used to receive and transmit radio frequency (RF) signals, also known as electromagnetic signals. The radio frequency circuit 904 communicates with communication networks and other communication devices through electromagnetic signals. The radio frequency circuit 904 converts electrical signals into electromagnetic signals for transmission, or converts received electromagnetic signals into electrical signals. Optionally, the radio frequency circuit 904 includes: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, and the like. The radio frequency circuit 504 can communicate with other devices through at least one wireless communication protocol. The wireless communication protocol includes, but is not limited to: the World Wide Web, a metropolitan area network, an intranet, various generations of mobile communication networks (2G, 3G, 4G and 5G), and a wireless local area network, which is not limited in the embodiments of the present application.

[0116] The display screen 905 is used to display a user interface (UI). The UI may include graphics, text, icons, videos, and any combination thereof. When the display screen 905 is a touch display screen, the display screen 905 also has the ability to collect touch signals on the surface or above the surface of the display screen 905. The touch signal can be input to the processor 901 as a control signal for processing. At this time, the display screen 905 can also be used to provide virtual buttons and / or virtual keyboards, also known as soft buttons and / or soft keyboards. In some embodiments, the display screen 905 can be a flexible display screen. Even, the display screen 905 can also be set to a non-rectangular irregular shape, that is, a special-shaped screen. The display screen 905 can be a liquid crystal display (LCD), an organic light-emitting diode (OLED) display screen, etc.

[0117] The camera assembly 906 is used to capture images or videos. Optionally, the camera assembly 906 includes a front camera and a rear camera. Optionally, the device 900 is a terminal device such as a smart phone or a tablet computer. Usually, the front camera is arranged on the front panel of the device 900, and the rear camera is arranged on the back of the device 900. In some embodiments, there are at least two rear cameras, which are any one of a main camera, a depth of field camera, a wide-angle camera, and a telephoto camera, so as to realize the fusion of the main camera and the depth of field camera to realize the background blur function, the fusion of the main camera and the wide-angle camera to realize the panoramic shooting and the virtual reality (VR) shooting function or other fusion shooting functions. In some embodiments, the camera assembly 906 may also include a flash. The flash can be a monochrome temperature flash or a dual color temperature flash. The dual color temperature flash refers to a combination of a warm light flash and a cold light flash, which can be used for light compensation at different color temperatures.

[0118] The audio circuit 907 may include a microphone and a speaker. The microphone is used to collect sound waves from the user and the environment, and convert the sound waves into electrical signals and input them into the processor 901 for processing, or input them into the radio frequency circuit 904 to achieve voice communication. For the purpose of stereo acquisition or noise reduction, there can be multiple microphones, which are respectively arranged at different parts of the device 900. The microphone can also be an array microphone or an omnidirectional acquisition microphone. The speaker is used to convert the electrical signal from the processor 901 or the radio frequency circuit 904 into sound waves. The speaker can be a traditional film speaker or a piezoelectric ceramic speaker. When the speaker is a piezoelectric ceramic speaker, it can not only convert the electrical signal into sound waves audible to humans, but also convert the electrical signal into sound waves inaudible to humans for purposes such as ranging.

[0119] The positioning component 908 is used to locate the geographic location of the device 900 to implement navigation or location based service (LBS). The positioning component 908 can be a positioning component based on the global positioning system (GPS), Beidou system or Galileo system.

[0120] The power supply 909 is used to supply power to various components in the device 900. The power supply 909 can be an alternating current, a direct current, a disposable battery, or a rechargeable battery. When the power supply 909 includes a rechargeable battery, the rechargeable battery can be a wired rechargeable battery or a wireless rechargeable battery. A wired rechargeable battery is a battery that is charged through a wired line, and a wireless rechargeable battery is a battery that is charged through a wireless coil.

[0121] In some embodiments, the device 900 further includes one or more sensors 910 , including but not limited to: a fingerprint sensor 911 , an optical sensor 912 , a proximity sensor 913 , a pressure sensor 914 , an acceleration sensor 915 , and a gyroscope sensor 916 .

[0122] The fingerprint sensor 911 is used to collect the fingerprint of the user, and the processor 901 identifies the identity of the user based on the fingerprint collected by the fingerprint sensor 911, or the fingerprint sensor 911 identifies the identity of the user based on the collected fingerprint. When the identity of the user is identified as a trusted identity, the processor 901 authorizes the user to perform relevant sensitive operations, which include unlocking the screen, viewing encrypted information, downloading software, paying, and changing settings. The fingerprint sensor 911 can be set on the front, back or side of the device 900. When a physical button or a manufacturer logo is set on the device 900, the fingerprint sensor 911 can be integrated with the physical button or the manufacturer logo.

[0123] The optical sensor 912 is used to collect the ambient light intensity. In one embodiment, the processor 901 can control the display brightness of the display screen 905 according to the ambient light intensity collected by the optical sensor 912. Specifically, when the ambient light intensity is high, the display brightness of the display screen 905 is increased; when the ambient light intensity is low, the display brightness of the display screen 905 is reduced. In another embodiment, the processor 901 can also dynamically adjust the shooting parameters of the camera assembly 907 according to the ambient light intensity collected by the optical sensor 912.

[0124] The proximity sensor 913, also called a distance sensor, is usually disposed on the front panel of the display screen 905 of the device 900. The proximity sensor 913 is used to collect the distance between the user and the display screen 905. In one embodiment, when the proximity sensor 913 detects that the distance between the user and the display screen 905 is gradually decreasing, the processor 901 controls the display screen 905 to switch from the screen-on state to the screen-off state; when the proximity sensor 913 detects that the distance between the user and the display screen 905 is gradually increasing, the processor 901 controls the display screen 905 to switch from the screen-off state to the screen-on state.

[0125] The pressure sensor 914 can be set on the side frame of the device 900 and / or the lower layer of the touch display screen 905. When the pressure sensor 914 is set on the side frame of the device 900, it can detect the user's holding signal of the device 900, and the processor 901 performs left and right hand recognition or shortcut operation according to the holding signal collected by the pressure sensor 914. When the pressure sensor 914 is set on the lower layer of the touch display screen 905, the processor 901 controls the operability controls on the UI interface according to the user's pressure operation on the touch display screen 905. The operability controls include at least one of a button control, a scroll bar control, an icon control, and a menu control.

[0126] The acceleration sensor 915 can detect the magnitude of acceleration on the three coordinate axes of the coordinate system established by the device 900. For example, the acceleration sensor 915 can be used to detect the components of gravity acceleration on the three coordinate axes. The processor 901 can control the touch display screen 905 to display the user interface in a horizontal view or a vertical view according to the gravity acceleration signal collected by the acceleration sensor 915. The acceleration sensor 915 can also be used for collecting game or user motion data.

[0127] The gyro sensor 916 can detect the body direction and rotation angle of the device 900, and the gyro sensor 916 can cooperate with the acceleration sensor 915 to collect the user's 3D actions on the device 900. The processor 901 can implement the following functions based on the data collected by the gyro sensor 912: motion sensing (such as changing the UI according to the user's tilt operation), image stabilization during shooting, game control, and inertial navigation.

[0128] Those skilled in the art will understand that Fig. 9 The structure shown in the figure does not constitute a limitation on the device 900. The device 900 may include more or fewer components than those shown in the figure, or combine some components, or adopt a different arrangement of components.

[0129] An embodiment of the present application provides a computer-readable storage medium, in which a computer program is stored. When the computer program is executed (for example, by a computer device, an apparatus for determining casing repair tension, one or more processors, etc.), all or part of the steps of the apparatus and method for determining casing repair tension provided in the above embodiment are implemented.

[0130] An embodiment of the present application provides a computer program product, which includes a program or code. When the program or code is executed (for example, when executed by a computer device, an apparatus for determining casing repair tension, one or more processors, etc.), all or part of the steps of the method for determining casing repair tension provided in the above embodiment are implemented.

[0131] It should be understood that the term "at least one" in this application refers to one or more, and "multiple" refers to two or more. The term "and / or" in this application is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, in order to facilitate clear description, in this application, the words "first", "second", "third" and the like are used to distinguish between identical or similar items with substantially the same functions and effects. Those skilled in the art will understand that the words "first", "second", "third" and the like do not limit the quantity and execution order.

[0132] The different types of embodiments such as the method embodiments and device embodiments provided in the embodiments of the present application can refer to each other, and the embodiments of the present application are not limited thereto. The sequence of operations of the method embodiments provided in the embodiments of the present application can be appropriately adjusted, and the operations can also be increased or decreased in response to the situation. Any technician familiar with the technical field can easily think of the changed methods within the technical scope disclosed in the present application, and they should be included in the protection scope of the present application, so they will not be repeated.

[0133] In the corresponding embodiments provided in the present application, it should be understood that the disclosed devices and the like can be implemented by other configuration methods. For example, the device embodiments described above are only illustrative, for example, the division of modules is only a logical function division, and there may be other division methods in actual implementation, for example, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0134] The modules described as separate components may or may not be physically separate, and the components described as modules may or may not be physical modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0135] The above is only an exemplary embodiment of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A method for determining casing repair tension, characterized in that: The method comprises: Acquire strength information of an oil layer casing in a first well, structural information of a free section of the oil layer casing, and position information of a deformed section of the oil layer casing, wherein the free section includes the deformed section, and the position information of the deformed section is used to characterize the position of the deformed section in the first well; Constructing a three-dimensional model of the free section according to the strength information of the oil layer casing, the structural information of the free section and the position information of the deformed section; Acquiring a repair relationship corresponding to the oil layer casing based on the three-dimensional model of the free segment, wherein the repair relationship includes a relationship between the repair tension of the oil layer casing and the diameter of the oil layer casing; The target repair tension is determined according to the repair relationship between the expected diameter and the oil layer casing. The target repair tension is the repair tension that needs to be applied to the oil layer casing to repair the oil layer casing until the diameter reaches the expected diameter.

2. The method according to claim 1, characterized in that: The step of obtaining the repair relationship corresponding to the oil layer casing based on the three-dimensional model of the free segment includes: Acquire a first relationship between the repair tension of the oil layer casing and the stretching length of the oil layer casing based on the three-dimensional stereoscopic model of the free segment; Acquire a second relationship between the stretched length of the oil layer casing and the diameter of the oil layer casing based on the three-dimensional model of the free segment; The repair relationship includes the first relationship and the second relationship.

3. The method according to claim 2, characterized in that The first relationship is: F = c × L d ; The second relationship is: R = a × e (-L / k) +b; Wherein, F represents the repair tension of the oil layer casing, L represents the stretching length of the oil layer casing, R represents the diameter of the oil layer casing, e is the base of the natural logarithm function, and a, b, c, d and k are all constants.

4. The method according to any one of claims 1 to 3, characterized in that: The method further comprises: obtaining the corrosion degree of the oil layer casing; The method of constructing a three-dimensional stereo model of the free section according to the strength information of the oil layer casing, the structural information of the free section and the position information of the deformation section includes: constructing a three-dimensional stereo model of the free section according to the strength information of the oil layer casing, the structural information of the free section, the position information of the deformation section and the corrosion degree of the oil layer casing.

5. The method according to claim 4, characterized in that The obtaining of the corrosion degree of the oil layer casing comprises: Obtaining the corrosion rate of the oil layer casing in the first well; The corrosion degree of the oil layer casing is determined according to the corrosion rate of the oil layer casing in the first well and the time for which the oil layer casing is lowered into the first well.

6. The method according to any one of claims 1 to 3, characterized in that: The structural information of the free segment includes at least one of the following: the length of the free segment, the shape information of the free segment, the diameter of the free segment, and the wall thickness of the free segment; The position information of the deformation segment includes at least one of the following: the top depth of the deformation segment, the bottom depth of the deformation segment; The strength information of the oil layer casing includes the steel grade of the oil layer casing.

7. A device for determining the tension of casing repair, characterized in that: The device comprises: A first acquisition module is used to acquire strength information of an oil layer casing in a first well, structural information of a free section of the oil layer casing, and position information of a deformed section of the oil layer casing, wherein the free section includes the deformed section, and the position information of the deformed section is used to characterize the position of the deformed section in the first well; A construction module, used to construct a three-dimensional model of the free segment according to the strength information of the oil layer casing, the structural information of the free segment and the position information of the deformed segment; A second acquisition module is used to acquire a repair relationship corresponding to the oil layer casing based on the three-dimensional model of the free segment, wherein the repair relationship includes a relationship between the repair tension of the oil layer casing and the diameter of the oil layer casing; The determination module is used to determine a target repair tension according to a repair relationship between an expected diameter and the oil layer casing, wherein the target repair tension is a repair tension required to be applied to the oil layer casing to repair the oil layer casing until the diameter reaches the expected diameter.

8. The device according to claim 7, characterized in that The second acquisition module is used to: Acquire a first relationship between the repair tension of the oil layer casing and the stretching length of the oil layer casing based on the three-dimensional stereoscopic model of the free segment; Acquire a second relationship between the stretched length of the oil layer casing and the diameter of the oil layer casing based on the three-dimensional model of the free segment; The repair relationship includes the first relationship and the second relationship.

9. The device according to any one of claims 7 to 8, characterized in that The device further comprises: a third acquisition module, used to acquire the corrosion degree of the oil layer casing; The construction module is used to construct a three-dimensional model of the free section according to the strength information of the oil layer casing, the structural information of the free section, the position information of the deformed section and the corrosion degree of the oil layer casing.

10. The device according to claim 9, characterized in that The third acquisition module is used to: Obtaining the corrosion rate of the oil layer casing in the first well; The corrosion degree of the oil layer casing is determined according to the corrosion rate of the oil layer casing in the first well and the time for which the oil layer casing is lowered into the first well.

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