Anti-scratch method and anti-scratch equipment for coiled tubing

Abstract

This application discloses a method and device for preventing scratches on a continuous tubing, relating to the field of continuous tubing protection. The method includes: inputting a preset length parameter for a susceptible section; obtaining the number of layers of continuous tubing in the continuous tubing roll where the susceptible section is located based on the preset length parameter; and applying an anti-scratch material to the surface of the layer of continuous tubing preceding the layer containing the susceptible section, thereby separating the preceding layer of continuous tubing from the layer containing the susceptible section via the anti-scratch material. An anti-scratch device employs the aforementioned method. This application can address issues such as the inability of current methods to address scratches or the high cost of such issues.

Description

Technical Field

[0001] The present application belongs to the technical field of coiled tubing protection, and specifically relates to a method and device for preventing coiled tubing from being scratched. Background Art

[0002] During the coiled tubing (CT) reversing process, loose winding of the CTs or tightening of the CTs during reversing can cause relative movement between the CTs and adjacent layers, leading to friction between the CTs and scratches on the CT surfaces. Surface scratches can shorten the lifespan of the CTs. If scratches are not promptly repaired, they can become thinner sections, forming corrosion pits that increase the local corrosion current dramatically. This accelerates corrosion, leading to corrosion and leakage failure at the scratched areas.

[0003] Currently, surface oil spraying, adding protective sleeves, or using specialized operating equipment are commonly used to mitigate surface scratches on coiled tubing. However, surface oil spraying cannot effectively reduce relative movement within the coiled tubing, and thus cannot effectively address surface scratches. Adding protective sleeves or using specialized operating equipment is only suitable for short lengths of tubing, but significantly increases costs when applied to coiled tubing. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide a method and device for preventing scratches on a coiled tubing, which can solve the problem that scratches cannot be solved by current methods or are costly.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] The present invention provides a method for preventing scratches on a susceptible section of a coiled tubing in a coiled tubing reel. The coiled tubing reel includes multiple layers of wound coiled tubing. The method includes the following steps:

[0007] Inputting the preset length parameter of the scratch-prone section;

[0008] Obtaining the number of layers of the coiled tubing in the coiled tubing reel where the easily scratched section is located according to the preset length parameter;

[0009] The anti-scratch material is covered on the surface of the coiled tubing layer before the layer where the easily scratched section is located, so that the anti-scratch material separates the coiled tubing layer before the layer where the easily scratched section is located from the coiled tubing.

[0010] The embodiment of the present application further provides an anti-scratch device, comprising: a pipe invertor and an anti-scratch material supply device;

[0011] The pipe reel includes a first roller and a second roller, wherein the first roller is used to release the coiled tubing and the second roller is used to wind the coiled tubing, and the first roller and the second roller are spaced apart.

[0012] The material supply end of the anti-scratch material supply device is arranged between the first roller and the second roller, and is used to add the anti-scratch material to the coiled tubing between the first roller and the second roller.

[0013] In the embodiment of the present application, the scratch-resistant material (or, scratch-resistant structure) can be used to separate the layer containing the easily scratched section from the previous layer of continuous oil tubing, effectively preventing contact between the previous layer of continuous oil tubing and the easily scratched section, thereby avoiding damage to the easily scratched section and ensuring the integrity of the easily scratched section. Compared to the surface oil spraying method, the embodiment of the present application can separate the easily scratched section with the scratch-resistant material, thereby achieving a better scratch-resistant effect; compared to the method of adding a protective cover, the embodiment of the present application does not need to cover the entire surface of the continuous oil tubing, thereby reducing the amount of anti-scratch material used and thus reducing costs; compared to the method of using specific operating equipment, the embodiment of the present application can use a universal anti-scratch material supply device in conjunction with a universal pipe-turning device, without the need for some specific operating equipment, thereby reducing equipment investment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a first flow chart of the method for preventing scratches on a coiled tubing disclosed in an embodiment of the present application;

[0015] Figure 2 A second flow chart of the method for preventing scratches on a coiled tubing disclosed in an embodiment of the present application;

[0016] Figure 3 This is a first schematic diagram of the coiled tubing reel and drum disclosed in an embodiment of the present application;

[0017] Figure 4 This is a second schematic diagram of the coiled tubing reel and drum disclosed in an embodiment of the present application;

[0018] Figure 5 This is a schematic structural diagram of the anti-scratch device disclosed in an embodiment of the present application.

[0019] Reference numerals

[0020] 100-coiled tubing;

[0021] 200-anti-scratch structure;

[0022] 300- roller; 310- first roller; 320- second roller;

[0023] 400-pipe rack;

[0024] 500-limiter;

[0025] 600-Anti-scratch material supply device. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0027] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0028] The wearable device provided in the embodiments of the present application is described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0029] refer to Figures 1 to 5 The present invention discloses a method for scratch-proofing a coiled tubing 100, for performing scratch-proofing on a susceptible section of the coiled tubing 100 in a coiled tubing reel, wherein the coiled tubing reel includes multiple layers of coiled tubing 100. The disclosed method for scratch-proofing the coiled tubing 100 includes the following steps:

[0030] Enter the preset length parameters of the scratch-prone section;

[0031] Obtaining the number of layers of the coiled tubing 100 in the coiled tubing roll where the easily scratched section is located according to a preset length parameter;

[0032] The anti-scratch material (ie, the anti-scratch structure 200 described below) is covered on the surface of the coiled tubing 100 in the previous layer where the easily scratched section is located, so as to separate the previous layer of coiled tubing 100 from the coiled tubing 100 in the layer where the easily scratched section is located by the anti-scratch material.

[0033] In some embodiments, a drum 300 wrapped with coiled tubing 100 is placed on a pipe reel and secured thereto. The reel can then be driven to rotate the drum 300, thereby winding the coiled tubing 100, i.e., reeling the coiled tubing 100. During the reeling process, the coiled tubing 100 is wound around the drum 300 dozens of times, forming a first layer. Once the first layer is fully wound, the reel continues to wind the second layer, and so on, ultimately winding several layers of coiled tubing 100 onto the delivery drum 300 for easy shipment.

[0034] Considering that the coiled tubing 100 may contain a susceptible section, and that this susceptible section is located between two adjacent layers of coiled tubing 100, in the embodiments of the present application, an anti-scratch material is provided to separate the susceptible section from the adjacent coiled tubing 100 to prevent damage to the susceptible section. The anti-scratch material can be delivered via an anti-scratch device, whereby the anti-scratch material is delivered to the coiled tubing 100, thereby separating the susceptible section from the adjacent coiled tubing. It should be noted that the dimensions of the susceptible section, such as its length, can be determined based on practical experience; furthermore, the specific structure and operating principle of the anti-scratch device can be referenced in the prior art.

[0035] To determine the location of the susceptible section within the coiled tubing reel, the pre-set length parameters for the susceptible section are first input into the anti-scratch device's control unit. Based on the pre-set length parameters, the control unit then calculates the number of layers of coiled tubing 100 that the susceptible section should be wound around within the coiled tubing reel. For example, if the susceptible section is located at layer n, unwinding the coiled tubing 100 will cease when the coiled tubing 100 is fully wound at layer n-1. It should be noted that the specific calculation process for the number of layers of susceptible sections within the coiled tubing reel will be detailed below.

[0036] After determining the layer number of the scratch-prone section, anti-scratch material is applied based on the distribution of the scratch-prone section to prevent damage. Specifically, when the scratch-prone section is located on the nth layer, the anti-scratch material is delivered to the n-1th layer of coiled tubing 100 via the anti-scratch device and secured there. The pipe reel is then rotated, with the roller 300 rotating so that the anti-scratch material covers the surface of the n-1th layer of coiled tubing 100, completely wrapping the nth layer of coiled tubing 100. This ensures that the n-1th layer of coiled tubing 100 is separated from the nth layer of coiled tubing 100 by the anti-scratch material, preventing the scratch-prone section on the nth layer from contacting the n-1th layer of coiled tubing 100. This effectively protects the scratch-prone section from collision and abrasion by the n-1th layer of coiled tubing 100, ensuring that the scratch-prone section remains intact.

[0037] Based on the above arrangement, in the embodiment of the present application, the anti-scratch material (or the anti-scratch structure 200) can separate the layer where the easily scratched section is located from the previous layer of coiled tubing 100, effectively preventing contact between the previous layer of coiled tubing 100 and the easily scratched section, thereby avoiding damage to the easily scratched section and ensuring the integrity of the easily scratched section.

[0038] Compared with the surface oil spraying method, the embodiment of the present application can separate the easily scratched section with anti-scratch material, thereby having a better anti-scratch effect; compared with the method of adding a protective cover, the embodiment of the present application does not need to cover the entire surface of the continuous oil pipe 100, thereby reducing the amount of anti-scratch material used and thus reducing costs; compared with the method of using specific operating equipment, the embodiment of the present application can use a universal anti-scratch material supply device 600 in conjunction with a universal pipe inverting device without the need to use some specific operating equipment, thereby reducing the investment cost in equipment.

[0039] In some embodiments, obtaining the number of layers of the scratch-prone section in the coiled tubing reel includes:

[0040] The length range of the anti-scratch material is defined as L1-L2. The specifications of the drum 300 around which the coiled tubing is wound are A×B×C×D, where A is the outer diameter of the drum 300, B is the core diameter of the drum 300, C is the outer width of the drum 300, D is the inner width of the drum 300, and E is the outer diameter of the coiled tubing 100. Therefore, each layer of coiled tubing 100 contains a total of D / E coiled tubing turns 100.

[0041] The length of each coil of the first layer of coiled tubing 100 on the drum 300 is calculated as L3 = (π × B × 25.4) meters. The total length of the first layer of coiled tubing 100 is L4 = L3 × D / E meters. The length of each coil of the second layer of coiled tubing 100 is calculated as L5 = π × (B + E) × 25.4 meters. The total length of the second layer of coiled tubing 100 is L6 = L5 × D / E meters. Similarly, the length of each coil of the nth layer of coiled tubing 100 is calculated as L (2n+1) =π×[B+(n-1)×E]×25.4 meters, the total length L of the nth layer of coiled tubing 100 (2n+2) =L (2n+1) ×D / E meters; where 25.4 is the conversion factor between inches and meters. When the unit is inches, 25.4 can be removed.

[0042] When the preset length parameter is between (L4+L6+…+L (2n+2) ) and (L4+L6+…+L (2n+4) ), it is determined that the easy-scratch section is located in the nth layer and the n+1th layer adjacent to the nth layer.

[0043] Based on the above steps, the length of each coil in each layer of coiled tubing 100 and the total length of each layer of coiled tubing 100 can be obtained. This allows the total length of the multi-layer coiled tubing 100 to be calculated based on the total length of each layer of coiled tubing 100, that is, the total length of the coiled tubing roll. Furthermore, the actual total length of the multi-layer coiled tubing 100 can be compared with a preset length parameter to determine between which two adjacent layers of coiled tubing 100 the preset length parameter falls, thereby determining the layer of coiled tubing 100 in which the scratch-prone section is located. Furthermore, the outer layer of the layer containing the scratch-prone section can also be a scratch-prone layer.

[0044] In the embodiment of the present application, during the coiled tubing reel winding operation, after the winding of the layer preceding the layer containing the easily scratched section is completed, the winding operation is stopped, and then the anti-scratch material is fixed to the previous layer of coiled tubing 100. The roller 300 is rotated so that the anti-scratch material covers the surface of the previous layer of coiled tubing 100. Alternatively, the anti-scratch material can be fixed to the coiled tubing 100 manually, for example, by manually bonding the anti-scratch material to the coiled tubing 100.

[0045] It should be noted that as the drum 300 rotates, the anti-scratch material attached to the previous layer of coiled tubing 100 rotates with the previous layer of coiled tubing 100 and is wound around the surface of the previous layer of coiled tubing 100. Simultaneously, the subsequent layer of coiled tubing 100 can also be wound around the surface of the anti-scratch material as the drum 300 rotates. This process allows the anti-scratch material and the subsequent layer of coiled tubing 100 to be wound synchronously. This allows the anti-scratch material to separate the adjacent previous and subsequent layers of coiled tubing 100, preventing the scratch-prone sections from being damaged by friction or collision with adjacent layers of coiled tubing 100. Furthermore, it improves the winding efficiency of the coiled tubing 100, thereby improving the efficiency of the coiled tubing 100 winding.

[0046] In other embodiments, after the winding operation is stopped, the anti-scratch material can be fixed to the previous layer of coiled tubing 100. The drum 300 does not rotate, but instead the anti-scratch device drives the anti-scratch material to be wound around the surface of the previous layer of coiled tubing 100. After the anti-scratch material is wound, the drum 300 is started, and the next layer of coiled tubing 100 is wound by rotating the drum 300. This process can also separate the adjacent previous layer of coiled tubing 100 from the next layer of coiled tubing 100 using the anti-scratch material, thereby preventing the easily scratched section from being damaged by friction or collision with the adjacent layer of coiled tubing 100.

[0047] In some embodiments, after the anti-scratch material covers the previous layer of coiled tubing 100, the anti-scratch method further includes: cutting the anti-scratch material and continuing the coiled tubing reeling operation to wind the remaining portion of the coiled tubing 100 onto the drum 300. It should be noted that when a susceptible section is located between two adjacent layers of coiled tubing 100, the provision of anti-scratch material between the two adjacent layers of coiled tubing 100 can effectively prevent further damage to the susceptible section. Thus, once the anti-scratch material covers the previous layer of coiled tubing 100, it acts as a separator. Other sections where there are no susceptible sections do not require covering with anti-scratch material, thereby reducing costs.

[0048] Based on the above situation, in the embodiment of the present application, the anti-scratch material can be cut off after the anti-scratch material covers the previous layer of continuous oil pipe 100, thereby preventing the continued use of the anti-scratch material and reducing the amount of anti-scratch material used, thereby minimizing the cost while ensuring that the easily scratched section is intact.

[0049] In other embodiments, after the anti-scratch material covers the previous layer of the continuous oil tubing 100, the anti-scratch method further includes: winding the continuous oil tubing 100 of the layer where the scratch-prone section is located, continuing to cover the surface of the continuous oil tubing 100 of the layer where the scratch-prone section is located with the anti-scratch material, cutting off the anti-scratch material, and continuing to wind the continuous oil tubing reel to wind the remaining portion of the continuous oil tubing 100 onto the drum 300. It should be noted that when the scratch-prone section is located between three layers of coiled tubing 100 arranged on one side, that is, when a scratch-prone section is provided between the first and second layers of coiled tubing 100, and between the second and third layers of coiled tubing 100, an anti-scratch material should be provided between the first and second layers of coiled tubing 100, and between the second and third layers of coiled tubing 100. This allows the first, second, and third layers of coiled tubing 100 to be separated, thereby effectively preventing damage to the scratch-prone section.

[0050] In this way, after the anti-scratch material covers the previous layer of coiled tubing 100 (i.e., the first layer of three adjacent coiled tubing 100), it only protects the easily scratched section between the first and second layers of coiled tubing 100. Therefore, the anti-scratch material needs to be applied to the next layer of coiled tubing 100 (i.e., the second layer of three adjacent coiled tubing 100) to further protect the easily scratched section between the second and third layers of coiled tubing 100. Therefore, once all easily scratched sections have been separated, the anti-scratch material can be cut, preventing further use of the anti-scratch material and reducing its usage, thereby lowering costs while ensuring the integrity of the easily scratched sections.

[0051] In other embodiments, all layers of coiled tubing 100 after the nth layer may require protection. In this case, after the nth layer of coiled tubing 100 is fully wound, the winding process may be stopped, the anti-scratch material may be fixed to the nth layer of coiled tubing 100, and the winding process may be continued. In this way, the anti-scratch material may be placed between every two adjacent layers of coiled tubing 100 in all layers of coiled tubing 100 after the nth layer to separate the two adjacent layers of coiled tubing 100. This protects all easily scratched sections after the nth layer and ensures that these easily scratched sections are not damaged.

[0052] In the embodiment of the present application, the anti-scratch method further includes: calculating the length of the anti-scratch material covering the surface of the coiled tubing 100, and when the covering length of the anti-scratch material reaches the calculated length, stopping covering the anti-scratch material and cutting off the anti-scratch material.

[0053] In this embodiment of the present application, an anti-scratch material is delivered through the anti-scratch device to secure the anti-scratch material to the corresponding coiled tubing 100, thereby protecting the easily scratched section. Furthermore, the anti-scratch material is controlled to be secured to the corresponding coiled tubing 100, and the pipe turner is controlled to rotate to turn the tubing. Simultaneously, the anti-scratch device is controlled to automatically calculate the length of the anti-scratch material covering the corresponding coiled tubing 100. Once the anti-scratch material reaches the calculated length and meets the requirements, the pipe turner is controlled to stop rotating and the anti-scratch material is cut off.

[0054] It should be noted that the calculation process for the number of layers of the scratch-prone section is performed within the control platform of the anti-scratch device. Specifically, the control platform calculates the number of layers of the scratch-prone section based on the input length of the scratch-prone section of the coiled tubing 100. Simultaneously, the length of the anti-scratch material can be obtained based on the length of the scratch-prone section.

[0055] In some embodiments, the anti-scratch material may include a hollow plate. Of course, it may also be any other type of structure. The embodiment of the present application does not specifically limit the structure of the anti-scratch material.

[0056] Optionally, the material of the hollow plate may include at least one of PE, PP, PVC or ABS, that is, it can be one material or a combination of multiple materials. The material of the hollow plate is not specifically limited in the embodiment of the present application.

[0057] Based on the above arrangement, the anti-scratch material in the embodiment of the present application can act as a separator to prevent the easily scratched section from contacting the coiled tubing 100 of other layers and causing damage to the easily scratched section. In addition, the anti-scratch material can also act as a buffer to prevent the coiled tubing 100 from colliding with the anti-scratch material and causing damage. At the same time, it can also prevent the generation of collision noise between the coiled tubing 100 and the anti-scratch material.

[0058] Based on the above-mentioned scratch prevention method for the coiled tubing 100, an embodiment of the present application further discloses a coiled tubing 100 having an anti-scratch structure 200. The disclosed coiled tubing 100 having the anti-scratch structure 200 includes a multi-layer coiled tubing 100 and the anti-scratch structure 200, wherein at least one layer of the multi-layer coiled tubing 100 has a scratch-prone section, and the anti-scratch structure 200 is disposed on the surface of the coiled tubing 100 layer preceding the layer where the scratch-prone section is located, so that the anti-scratch structure 200 separates the coiled tubing 100 layer preceding the layer where the scratch-prone section is located from the coiled tubing 100 layer where the scratch-prone section is located.

[0059] Compared with the surface oil spraying method, the anti-scratch structure 200 separates the easily scratched section, thereby achieving a better anti-scratch effect; compared with the method of adding a protective cover, the embodiment of the present application does not need to cover the entire surface of the continuous oil pipe 100, thereby reducing the use of the anti-scratch structure 200 and thus reducing costs; compared with the method of using specific operating equipment, the embodiment of the present application can use a universal anti-scratch structure 200 supply device in conjunction with a universal pipe inverting device, without the need for some specific operating equipment, thereby reducing the investment cost in terms of equipment.

[0060] Furthermore, the anti-scratch structure 200 may include a hollow plate, or of course, any other type of structure. The embodiment of the present application does not specifically limit the structure of the anti-scratch material.

[0061] Optionally, the material of the hollow plate may include at least one of PE, PP, PVC or ABS, that is, it can be one material or a combination of multiple materials. The material of the hollow plate is not specifically limited in the embodiment of the present application.

[0062] refer to Figures 1 to 5 The embodiment of the present application also discloses an anti-scratch device that can be used to implement the above-mentioned anti-scratch method. The device is used to add anti-scratch material to the coiled tubing 100 during the tubing reversing process to alleviate the damage of the coiled tubing 100 caused by collision and friction between the coiled tubing 100.

[0063] The disclosed anti-scratch device may include a pipe reel and an anti-scratch material supply device 600. The pipe reel is used to reverse the pipe, and the anti-scratch material supply device 600 is used to supply anti-scratch material to the coiled tubing 100. The pipe reel may include a first roller 310 and a second roller 320. The first roller 310 is used to release the coiled tubing 100, while the second roller 320 is used to wind the coiled tubing 100. The first roller 310 and the second roller 320 are spaced apart. In this manner, the coiled tubing 100 is released by the first roller 310, and wound by the second roller 320, thereby achieving the pipe reel.

[0064] In order to prevent the two adjacent layers of coiled tubing 100 from colliding, rubbing, etc., which may cause damage to the coiled tubing 100, the material supply end of the anti-scratch material supply device 600 is set between the first roller 310 and the second roller 320. In this way, anti-scratch material can be added to the surface of the coiled tubing 100 between the first roller 310 and the second roller 320 through the material supply end, so that at least two adjacent layers of coiled tubing 100 in the multi-layer coiled tubing 100 wound around the second roller 320 can be separated by the anti-scratch material, thereby reducing damage to the coiled tubing 100.

[0065] Optionally, the pipe reversing device may further include a base frame and a drive mechanism, wherein the first roller 310 and the second roller 320 are rotatably mounted on the base frame, respectively. The drive mechanism includes a drive end that is in transmission connection with the first roller 310 and the second roller 320, respectively, to drive the first roller 310 and the second roller 320 to rotate. It should be noted that the drive mechanism may be a single or dual set. When a single set is used, the drive mechanism has two drive ends that are in transmission connection with the first roller 310 and the second roller 320, respectively. When a dual set is used, each set has a single drive end that is in transmission connection with the first roller 310 and the second roller 320, respectively. Furthermore, the drive mechanism may include a motor.

[0066] The anti-scratch material supply device 600 may include at least one pair of rotatable rollers. When the anti-scratch material is in a plate-like structure, the at least one pair of rotatable rollers can clamp the anti-scratch material. The rotation of the rollers drives the anti-scratch material forward, allowing the anti-scratch material to be delivered to the surface of the coiled tubing 100. It should be noted that the anti-scratch material supply device 600 may also have other structures, and this embodiment of the present application is not specifically limited thereto.

[0067] To ensure smooth tubing rewinding, the anti-scratch device may further include a tubing rack 400, positioned between the first roller 310 and the second roller 320. The tubing rack 400 is used to rack the coiled tubing 100 between the first and second rollers 310, 320, thereby ensuring that the coiled tubing 100 is more tightly wound around the second roller 320. Optionally, the tubing rack 400 may be a single or multiple groups. When multiple groups are present, the groups are sequentially spaced along the extension direction of the coiled tubing 100. It should be noted that the specific structure and principles of the tubing rack 400 can be referenced in related art and will not be elaborated upon here.

[0068] In addition, to prevent the coiled tubing 100 from moving during the reversing process, the anti-scratch device may also include a stopper 500. The stopper 500 can limit the position of the coiled tubing 100, thereby effectively preventing the coiled tubing 100 from moving during the reversing process, thereby ensuring the normal progress of the reversing process. It should be noted that the stopper 500 can be a stop ring, a stop tube, a stop sleeve, etc., and of course, it can also be any other component with a stop function.

[0069] In addition, the working process of the anti-scratch equipment is jointly controlled by the pipe pouring device control platform and the anti-scratch material supply device control platform, so as to realize automatic pipe pouring and automatic addition of anti-scratch material.

[0070] In summary, in the embodiments of the present application, an anti-scratch material or structure 200 is provided between two adjacent layers of coiled tubing 100 on either side of a susceptible section to separate the two layers of coiled tubing 100 and provide a buffering effect when relative motion occurs between the two layers of coiled tubing 100, thereby preventing scratches on the surface of the coiled tubing 100. Furthermore, the types of anti-scratch material or structure 200 are not limited in the embodiments of the present application; as long as they provide both separation and buffering effects, their types and materials are not restricted. Furthermore, the anti-scratch material or structure 200 is simple in structure and easy, convenient, and fast to operate. Furthermore, the embodiments of the present application reduce costs while preventing scratches on the coiled tubing 100.

[0071] The embodiments of the present application can be adapted to coiled tubing 100 of relatively long lengths and can protect different locations and numbers of easily scratched sections, thereby flexibly controlling the amount and placement of the anti-scratch material or anti-scratch structure 200 to improve the adaptability of the anti-scratch protection. Furthermore, coiled tubing 100 of varying diameters can be protected without the need for customization.

[0072] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A method for preventing scratches on a coiled tubing, for preventing scratches on a susceptible section of a coiled tubing in a coiled tubing reel, wherein the coiled tubing reel comprises a plurality of layers of wound coiled tubing, characterized in that: The method for preventing the coiled tubing from being scratched comprises the following steps: Inputting the preset length parameter of the scratch-prone section; The number of layers of the coiled tubing in the coiled tubing roll where the scratch-prone section is located is obtained according to the preset length parameter; wherein, the length range of the anti-scratch material is defined as L1-L2, L1 is the lower limit of the length of the anti-scratch material, L2 is the upper limit of the length of the anti-scratch material, and the specification of the roller for winding the coiled tubing roll is B×D, wherein B is the core diameter of the roller, D is the inner width of the roller, and E is the outer diameter of the coiled tubing. Then, there are D / E turns of coiled tubing in each layer of coiled tubing; the length of each turn of the first layer of coiled tubing on the roller is calculated as L3=(π×B), and the total length of the first layer of coiled tubing is L4=L3×D / E; the length of each turn of the second layer of coiled tubing is calculated as L5=π×(B+E), and the total length of the second layer of coiled tubing is L6=L5×D / E. Similarly, the length of each turn of the nth layer of coiled tubing is calculated as L （2n+1） =π×[B+(n-1)×E], the total length of the nth layer of coiled tubing L （2n+2） =L （2n+1） ×D / E; when the preset length parameter is between (L4+L6+…+L （2n+2） ) and (L4+L6+…+L （2n+4） ), it is determined that the easily scratched section is located between the nth layer and the n+1th layer; Covering the surface of the coiled tubing in the previous layer of the layer where the easily scratched section is located with an anti-scratch material, so as to separate the coiled tubing in the previous layer of the layer from the coiled tubing in the layer where the easily scratched section is located with the anti-scratch material; The length of the anti-scratch material covering the surface of the coiled tubing is calculated; when the covering length of the anti-scratch material reaches the calculated length, the covering of the anti-scratch material is stopped and the anti-scratch material is cut off.

2. The method for preventing the coiled tubing from being scratched according to claim 1, wherein: During the coiled tubing reel winding operation, the winding operation is stopped when the winding of the layer before the layer where the easily scratched section is located is completed; The anti-scratch material is fixed on the previous layer of coiled tubing, and the drum is rotated to allow the anti-scratch material to cover the surface of the previous layer of coiled tubing.

3. The method for preventing the coiled tubing from being scratched according to claim 2, wherein: After the anti-scratch material covers the previous layer of coiled tubing, the anti-scratch method further comprises: cutting off the anti-scratch material; The coiled tubing reel operation is continued to be performed to wind the remaining portion of the coiled tubing onto the drum.

4. The method for preventing the coiled tubing from being scratched according to claim 2, wherein: After the anti-scratch material covers the previous layer of coiled tubing, the anti-scratch method further comprises: The coiled tubing is wound around the layer where the easily scratched section is located; Continue to cover the surface of the coiled tubing where the scratch-prone section is located with the anti-scratch material; cutting off the anti-scratch material; Continue winding the coiled tubing reel to wind the remaining portion of the coiled tubing onto the drum.

5. The method for preventing the coiled tubing from being scratched according to claim 1, wherein: The anti-scratch material includes a hollow board.

6. The method for preventing the coiled tubing from being scratched according to claim 5, wherein: The material of the hollow plate includes at least one of PE, PP, PVC or ABS.

7. An anti-scratch device for executing the anti-scratch method for coiled tubing according to any one of claims 1 to 6, characterized in that: The anti-scratch equipment includes: a pipe flipper, an anti-scratch material supply device, a pipe flipper control platform and an anti-scratch material supply device control platform. The pipe flipper control platform is used to automatically flip the pipe by controlling the pipe flipper, and the anti-scratch material supply device control platform is used to automatically add anti-scratch material by controlling the anti-scratch material supply device. The pipe reel includes a first roller and a second roller, wherein the first roller is used to release the coiled tubing and the second roller is used to wind the coiled tubing, and the first roller and the second roller are spaced apart. The material supply end of the anti-scratch material supply device is arranged between the first roller and the second roller, and is used to add the anti-scratch material to the coiled tubing between the first roller and the second roller.

8. The anti-scratch device according to claim 7, characterized in that The device further comprises a pipe arranging device, which is arranged between the first roller and the second roller and is used for arranging the continuous oil pipe between the first roller and the second roller.

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