Coiled tubing with distributed optical fiber sensing and power transmission functions

Abstract

The utility model discloses a coiled tubing with distributed optical fiber sensing and power transmission functions, which comprises an outer layer protection component, the inner side wall of the outer layer protection component is wedged and connected with an inner layer protection component, and the inner side wall of the inner layer protection component is provided with a signal transmission component; the signal transmission assembly is used for carrying out distributed optical fiber sensing and power transmission, and the inner layer protection assembly is used for carrying out coating protection on the signal transmission assembly; according to the utility model, the function of stably limiting the position of the signal transmission assembly is realized, the functions of distributed optical fiber sensing, hydraulic power transmission and electric power control transmission are also realized, and the signal transmission assembly can be protected by the eccentric pipe, the supporting pipe, the sheath and the inner-layer protection pipe in a multi-layer manner in the transmission process; the signal transmission assembly can be rapidly and efficiently installed, the signal transmission reliability of the signal transmission assembly is improved, and the signal transmission assembly is suitable for being widely popularized and used.

Description

Technical Field

[0001] The utility model belongs to the technical field of continuous oil pipes, in particular to a continuous oil pipe with distributed optical fiber sensing and power transmission functions. Background Art

[0002] Coiled tubing, a widely used flexible pipe in the oil and gas industry, can be placed directly and smoothly into oil wells, significantly improving operational efficiency compared to traditional pipes that require frequent docking. By integrating optical fibers, cables, or hydraulic lines within the coiled tubing, a smart pipe can be constructed that incorporates distributed fiber-optic sensing and power output capabilities such as electrical and hydraulics. This smart pipe is suitable for a variety of oil and gas operations, including drilling, completion, obstacle removal, fracturing, and gas lift, becoming an indispensable key piece of equipment in the oil and gas sector.

[0003] Currently, most coiled tubing used underground is made of low-carbon alloy steel. During the manufacturing process, the steel strip, through welding and tempering, must withstand high temperatures of thousands of degrees to ensure reliable welding quality of the final product, thereby ensuring that the coiled tubing achieves the preset tensile and compressive strengths. However, these high-temperature processing steps prevent the direct embedding of heat-sensitive optical fibers and cables in the coiled tubing during the initial production phase. As a result, the optical fibers cannot be reliably fixed and bonded inside the coiled tubing, resulting in significant attenuation of temperature or vibration signals transmitted from the outside of the coiled tubing to the optical fibers inside. Furthermore, when used for internal fluid transportation, the optical fibers or cables pose a significant obstacle and are easily damaged by the impact of high-pressure fluids without reliable protection. Therefore, it is necessary to design a coiled tubing with distributed optical fiber sensing and power transmission capabilities. Summary of the Invention

[0004] In view of the above situation, in order to solve the problem that the current high-temperature processing procedures make it impossible for optical fibers and cables that are not resistant to high temperatures to be directly embedded in the continuous pipe at the early stage of production, resulting in the optical fibers not being reliably fixed and fitted inside the continuous oil pipe, so that the temperature or vibration signals outside the continuous oil pipe are transmitted to the internal optical fibers, which are severely attenuated. At the same time, when used for internal fluid transportation, the optical fibers or cables will play a greater obstructive role, and the optical fibers or cables are easily damaged by the impact of high-pressure fluid without reliable protection. The utility model provides a continuous oil pipe with distributed optical fiber sensing and power transmission functions, which effectively realizes the function of stably limiting the position of the signal transmission component, and also realizes the function of distributed optical fiber sensing, hydraulic power transmission and electric power control transmission. In addition, the signal transmission component can be protected by multiple layers of eccentric tubes, support tubes, sheaths and inner protective tubes during the transmission process, which not only enables the signal transmission component to be installed quickly and efficiently, but also improves the signal transmission reliability of the signal transmission component.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a continuous oil pipe with distributed fiber optic sensing and power transmission functions, comprising an outer protective component, wherein the inner side wall of the outer protective component is wedgedly connected to the inner protective component, and the inner side wall of the inner protective component is provided with a signal transmission component; the signal transmission component is used for distributed fiber optic sensing and power transmission, the inner layer protective component is used for covering and protecting the signal transmission component, and the outer layer protective component is used for limiting the inner layer protective component.

[0006] The aforementioned continuous oil pipe with distributed optical fiber sensing and power transmission functions, the outer protective component includes an outer protective tube, a crescent-shaped spring piece is arranged inside the outer protective tube, and an arc groove is opened on the outer side wall of the crescent-shaped spring piece.

[0007] The aforementioned continuous oil pipe with distributed optical fiber sensing and power transmission functions, the inner layer protection component includes an inner layer protection tube, the outer wall of the inner layer protection tube and the inner wall of the arc groove are wedged with each other, a sheath is inserted into the inner layer protection tube, and the outer wall of the sheath and the inner wall of the inner layer protection tube are filled with a first coupling filler.

[0008] The aforementioned continuous oil pipe with distributed optical fiber sensing and power transmission functions, the signal transmission component includes a support tube, the support tube is arranged inside the sheath, an eccentric tube is arranged inside the support tube, the second coupling filler is filled between the outer wall of the eccentric tube and the inner wall of the support tube, the hydraulic tube, the electric control cable, the first optical fiber cable and the second optical fiber cable are arranged inside the eccentric tube, wherein the third coupling filler is filled between the hydraulic tube, the electric control cable, the first optical fiber cable and the second optical fiber cable and the inner wall of the eccentric tube.

[0009] In the aforementioned continuous oil pipe with distributed optical fiber sensing and power transmission functions, the outer side wall of the crescent-shaped spring piece can fit tightly with the inner side wall of the outer protective tube under the action of the pre-tightening force.

[0010] In the aforementioned continuous oil pipe with distributed optical fiber sensing and power transmission functions, there are multiple crescent-shaped spring pieces, and the multiple crescent-shaped spring pieces are evenly distributed between the outer protective tube and the inner protective tube.

[0011] In the aforementioned continuous oil pipe with distributed optical fiber sensing and power transmission functions, the arc groove can tightly fit the outer wall of the inner protective tube with the inner wall of the outer protective tube under the elastic force of the crescent-shaped spring piece.

[0012] In the aforementioned coiled tubing with distributed optical fiber sensing and power transmission functions, the first coupling filler, the second coupling filler, and the third coupling filler are all filled in by injection.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] (1) The elastic force of the crescent-shaped spring clip can make the outer wall of the inner protective tube fit tightly with the inner wall of the outer protective tube. At the same time, under the action of the pre-tightening force of the crescent-shaped spring clip itself, the outer wall of the crescent-shaped spring clip fits tightly with the inner wall of the outer protective tube. In this way, the position of the inner protective tube in the outer protective tube can be limited, thereby preventing the signal transmission component in the inner protective tube from being offset and damaged during the use of the continuous oil pipe. The continuous oil pipe effectively realizes the function of stably limiting the position of the signal transmission component, and the signal transmission component can be more reliably protected by the inner protective tube, which not only prevents the signal transmission component from being damaged by the high-pressure and high-temperature gas and liquid flow flowing inside the outer protective tube, but also ensures the signal transmission effect of the signal transmission component.

[0015] (2) Hydraulic power transmission can be carried out through the hydraulic pipe provided inside the eccentric tube, and electric control transmission can be carried out through the electric control cable provided inside the eccentric tube. Then, optical fiber detection can be carried out inside and outside the outer protective tube through the first optical fiber cable and the second optical fiber cable provided inside the eccentric tube. The first coupling filler, the second coupling filler and the third coupling filler provided can ensure stable transmission of the signal transmission component while providing efficient protection. At the same time, the eccentric tube can be protected for the second time under the action of the support tube and the sheath provided, effectively realizing that the continuous oil pipe has the functions of distributed optical fiber sensing, hydraulic power transmission and electric control transmission, and the signal transmission component can be protected by the eccentric tube, the support tube and the sheath in multiple layers during the transmission process, which not only enables the signal transmission component to be installed quickly and efficiently, but also improves the signal transmission reliability of the signal transmission component. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the outer protective component of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the inner layer protection component of the present utility model;

[0020] Figure 4 For the utility model Figure 3 A in the middle is an enlarged structural diagram;

[0021] In the figure: 1. Outer protective assembly; 101. Outer protective tube; 102. Crescent-shaped spring clip; 103. Arc groove; 2. Inner protective assembly; 201. Inner protective tube; 202. First coupling filler; 203. Sheath; 3. Signal transmission assembly; 301. Support tube; 302. Second coupling filler; 303. Eccentric tube; 304. Third coupling filler; 305. Hydraulic tube; 306. Electric control cable; 307. First optical fiber cable; 308. Second optical fiber cable. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Example

[0023] Depend on Figures 1 to 4 The utility model provides a continuous oil pipe with distributed optical fiber sensing and power transmission functions, comprising an outer protective component 1, wherein the inner side wall of the outer protective component 1 is wedgedly connected to the inner protective component 2, and the inner side wall of the inner protective component 2 is provided with a signal transmission component 3; the signal transmission component 3 is used for distributed optical fiber sensing and power transmission, the inner protective component 2 is used for covering and protecting the signal transmission component 3, and the outer protective component 1 is used for limiting the inner protective component 2. By providing the signal transmission component 3, the continuous oil pipe has the functions of distributed optical fiber sensing, hydraulic power transmission and electric power control transmission, and the signal transmission component 3 can be protected by multiple layers of eccentric tube 303, support tube 301 and sheath 203 during the transmission process, which not only enables the signal transmission component 3 to be installed quickly and efficiently, but also improves the signal transmission reliability of the signal transmission component 3.

[0024] Specifically, the outer protective assembly 1 includes an outer protective tube 101, a crescent-shaped spring piece 102 is provided inside the outer protective tube 101, and an arc groove 103 is provided on the outer wall of the crescent-shaped spring piece 102. The crescent-shaped spring piece 102 can limit the position of the inner protective tube 201 in the outer protective tube 101, thereby preventing the signal transmission component 3 in the inner protective tube 201 from being offset and damaged during the use of the continuous oil pipe.

[0025] Specifically, the inner layer protection component 2 includes an inner layer protection tube 201, the outer wall of the inner layer protection tube 201 and the inner wall of the arc groove 103 are wedged with each other, a sheath 203 is inserted into the inner layer protection tube 201, and the outer wall of the sheath 203 and the inner wall of the inner layer protection tube 201 are filled with a first coupling filler 202. The eccentric tube 303 can be secondary protected by the support tube 301 and the sheath 203.

[0026] Specifically, the signal transmission component 3 includes a support tube 301, which is arranged inside the sheath 203. An eccentric tube 303 is arranged inside the support tube 301. A second coupling filler 302 is filled between the outer wall of the eccentric tube 303 and the inner wall of the support tube 301. A hydraulic tube 305, an electric control cable 306, a first optical fiber cable 307, and a second optical fiber cable 308 are arranged inside the eccentric tube 303. A third coupling filler 304 is filled between the hydraulic tube 305, the electric control cable 306, the first optical fiber cable 307, the second optical fiber cable 308 and the inner wall of the eccentric tube 303. Hydraulic power can be transmitted through the hydraulic tube 305 provided inside the eccentric tube 303, and electric control transmission can be performed through the electric control cable 306 provided inside the eccentric tube 303. Finally, optical fiber detection can be performed inside and outside the outer protective tube 101 through the first optical fiber cable 307 and the second optical fiber cable 308 provided inside the eccentric tube 303.

[0027] Specifically, the outer wall of the crescent-shaped spring piece 102 can fit tightly with the inner wall of the outer protective tube 101 under the action of the preload force, and the outer wall of the crescent-shaped spring piece 102 fits tightly with the inner wall of the outer protective tube 101 under the action of the preload force of the crescent-shaped spring piece 102 itself.

[0028] Specifically, there are multiple crescent-shaped spring pieces 102, and the multiple crescent-shaped spring pieces 102 are evenly distributed in the middle position between the outer protective tube 101 and the inner protective tube 201. The elastic force of the crescent-shaped spring pieces 102 can tightly fit the outer wall of the inner protective tube 201 with the inner wall of the outer protective tube 101.

[0029] Specifically, the arc-shaped groove 103 can closely fit the outer wall of the inner protective tube 201 and the inner wall of the outer protective tube 101 under the elastic force of the crescent-shaped spring piece 102.

[0030] Specifically, the first coupling filler 202 , the second coupling filler 302 , and the third coupling filler 304 are all filled by injection. The first coupling filler 202 , the second coupling filler 302 , and the third coupling filler 304 can ensure stable transmission of the signal transmission component 3 while providing efficient protection.

[0031] When in use, first, the elastic force of the crescent-shaped spring piece 102 can make the outer wall of the inner protective tube 201 fit tightly with the inner wall of the outer protective tube 101. At the same time, under the action of the pre-tightening force of the crescent-shaped spring piece 102 itself, the outer wall of the crescent-shaped spring piece 102 can fit tightly with the inner wall of the outer protective tube 101. In this way, the position of the inner protective tube 201 in the outer protective tube 101 can be limited, thereby preventing the signal transmission component 3 in the inner protective tube 201 from being deviated and damaged during the use of the continuous oil pipe, effectively realizing that the continuous oil pipe has the function of stably limiting the position of the signal transmission component 3, and the signal transmission component 3 can be more reliably protected by the inner protective tube 201, not only preventing the signal transmission component 3 from being damaged by the high-pressure and high-temperature gas and liquid flow flowing inside the outer protective tube 101, but also ensuring the signal transmission effect of the signal transmission component 3, and then through the hydraulic pipe 305 provided in the eccentric tube 303, Hydraulic power transmission is performed, and then electric control transmission is performed through the electric control cable 306 provided in the eccentric tube 303. Then, optical fiber detection can be performed inside and outside the outer protective tube 101 through the first optical fiber cable 307 and the second optical fiber cable 308 provided in the eccentric tube 303. The first coupling filler 202, the second coupling filler 302 and the third coupling filler 304 can ensure stable transmission of the signal transmission component 3 while providing efficient protection. At the same time, the eccentric tube 303 can be protected secondary by the support tube 301 and the sheath 203, effectively realizing the functions of the coiled tubing for distributed optical fiber sensing, hydraulic power transmission and electric control transmission. In addition, the signal transmission component 3 can be protected by multiple layers of the eccentric tube 303, the support tube 301 and the sheath 203 during the transmission process, which not only enables the signal transmission component 3 to be installed quickly and efficiently, but also improves the signal transmission reliability of the signal transmission component 3.

[0032] The components used in the present invention are all finished products produced by existing technologies and can be purchased on the market; the components are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0033] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coiled tubing with distributed optical fiber sensing and power transmission functions, comprising an outer protective component (1), characterized in that: The inner side wall of the outer protective component (1) is wedgedly connected to the inner protective component (2), and the inner side wall of the inner protective component (2) is provided with a signal transmission component (3); The signal transmission component (3) is used for distributed optical fiber sensing and power transmission, the inner layer protection component (2) is used for covering and protecting the signal transmission component (3), and the outer layer protection component (1) is used for limiting and protecting the inner layer protection component (2).

2. The coiled tubing with distributed optical fiber sensing and power transmission function according to claim 1, characterized in that: The outer layer protection component (1) comprises an outer layer protection tube (101), a crescent-shaped spring piece (102) is provided inside the outer layer protection tube (101), and an arc-shaped groove (103) is provided on the outer side wall of the crescent-shaped spring piece (102).

3. The coiled tubing with distributed optical fiber sensing and power transmission function according to claim 2, characterized in that: The inner layer protection component (2) comprises an inner layer protection tube (201), the outer side wall of the inner layer protection tube (201) and the inner side wall of the arc groove (103) are wedged with each other, a sheath (203) is inserted into the inner layer protection tube (201), and the outer side wall of the sheath (203) and the inner side wall of the inner layer protection tube (201) are filled with a first coupling filler (202).

4. The coiled tubing with distributed optical fiber sensing and power transmission function according to claim 3, characterized in that: The signal transmission component (3) comprises a support tube (301), the support tube (301) being arranged inside the sheath (203), an eccentric tube (303) being arranged inside the support tube (301), a second coupling filler (302) being filled between the outer wall of the eccentric tube (303) and the inner wall of the support tube (301), a hydraulic tube (305), an electric control cable (306), a first optical fiber cable (307), and a second optical fiber cable (308) being arranged inside the eccentric tube (303), wherein a third coupling filler (304) is filled between the hydraulic tube (305), the electric control cable (306), the first optical fiber cable (307), the second optical fiber cable (308) and the inner wall of the eccentric tube (303).

5. The coiled tubing with distributed optical fiber sensing and power transmission function according to claim 2, characterized in that: The outer side wall of the crescent-shaped spring piece (102) can be tightly fitted with the inner side wall of the outer protective tube (101) under the action of the pre-tightening force.

6. The coiled tubing with distributed optical fiber sensing and power transmission function according to claim 3, characterized in that: There are multiple crescent-shaped spring pieces (102), and the multiple crescent-shaped spring pieces (102) are evenly distributed in the middle of the outer protective tube (101) and the inner protective tube (201).

7. The coiled tubing with distributed optical fiber sensing and power transmission functions according to claim 6, characterized in that: The arc-shaped groove (103) can tightly fit the outer wall of the inner protective tube (201) and the inner wall of the outer protective tube (101) under the elastic force of the crescent-shaped spring piece (102).

8. The coiled tubing with distributed optical fiber sensing and power transmission functions according to claim 4, characterized in that: The first coupling filler (202), the second coupling filler (302), and the third coupling filler (304) are all filled in by injection.

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