Coiled tubing vehicle and drum arrangement thereof, rotary joint

Abstract

This invention discloses a coiled tubing vehicle and its drum assembly and rotary joint. The rotary joint includes: a coiled tubing external T-section, a cable core, a cable clamp, a rotary joint body, a slip ring assembly, a rotary joint, and a sealing device. The rotary joint body connects to the drum shaft. The treatment fluid flows sequentially through the rotary joint, the rotary joint body, and the inlet end of the coiled tubing external T-section. One end of the cable clamp is connected to the outlet end of the coiled tubing external T-section, and the other end connects to the coiled tubing. The cable core mates with the slip ring assembly, passing through the inlet end and the outlet end, and mates with the cable clamp. The sealing device is located between the inlet end of the coiled tubing external T-section and the cable core. This design allows for both pumping treatment fluid for well workover operations and transmitting monitoring signal data from the bottom logging instrument of the coiled tubing to the surface, achieving wired logging and reducing labor intensity and construction costs.

Description

Technical Field

[0001] This invention relates to the field of coiled tubing cable logging equipment technology, and particularly to a coiled tubing vehicle and its roller assembly and rotary joint. Background Technology

[0002] Coiled tubing is a continuous, flexible steel pipe, typically 1-2 inches in diameter and 2000-7000 meters in length. The coiled tubing is wound in coils around a large winding drum. During well entry, a high-pressure rotary joint at the center of the winding drum pumps processing fluid into the tubing, causing the drum to rotate. The coiled tubing is then unwound from the winding drum and straightened by a gooseneck guide before being lowered into the wellbore. After the operation is complete, the flexible coiled tubing is retrieved from the well and rewound onto the winding drum. Because the tubing is continuous, no connections are needed during well entry, allowing for continuous circulation throughout the process.

[0003] Currently, the most commonly used coiled tubing trucks have a rotary joint installed on one side of the roller, while the other side is driven by a hydraulic motor, which makes it impossible to transmit data information through the internal cables.

[0004] The existing technology involves a specially designed roller. One end of this roller shaft is a rotary joint, and the other end outputs cable information. The roller is driven by a chain. However, in addition to increasing the cost of construction, the additional roller also requires unwinding the continuous hydraulic hoses on the hydraulic motor-driven roller used on site and then rewinding them onto the specially designed roller, resulting in a very large workload. Summary of the Invention

[0005] In view of this, the present invention provides a continuous tubing-to-cable rotary joint, which can not only greatly reduce construction costs, but also reduce the workload of construction.

[0006] The present invention also provides a continuous tubing roller device that uses the above-mentioned continuous tubing cable rotary joint.

[0007] The present invention also provides a continuous tubing vehicle that applies the above-described continuous tubing roller device.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A coiled tubing rotary joint for cable connection includes: a coiled tubing external T-type short section, a cable core, a cable clamp, a rotary joint body, a slip ring assembly, a rotary joint, and a sealing device;

[0010] The rotary joint body is used to connect the drum shaft; the rotary joint is connected to the rotary joint body; the inlet end of the continuous tubing external T-shaped short section is connected to the rotary joint body; the treatment fluid can pass through the rotary joint and flow sequentially through the rotary joint body and the inlet end of the continuous tubing external T-shaped short section.

[0011] One end of the cable clamp is connected to the outlet end of the external T-shaped short section of the coiled tubing, and the other end is used to connect to the coiled tubing.

[0012] The slip ring assembly is disposed on the rotary joint body; the cable core mates with the slip ring assembly, and the cable core passes through the inlet end of the coiled tubing external T-shaped short section, the outlet end of the coiled tubing external T-shaped short section, and mates with the cable clamp; the sealing device is disposed between the inlet end of the coiled tubing external T-shaped short section and the cable core.

[0013] Preferably, it further includes: a tapered sleeve; the tapered sleeve is disposed inside the end of the cable clamp near the outlet end;

[0014] The conical sleeve is provided with a cable core through hole for engaging with the cable core, and the conical sleeve is provided with a flow hole for engaging with the treatment fluid;

[0015] The continuous tubing-to-cable rotary joint further includes: a flow tube embedded in the flow hole for use with the treatment fluid.

[0016] Preferably, there are multiple flow holes, which are evenly distributed around the cable core through the holes;

[0017] The number of flow tubes is multiple, and the multiple flow tubes are embedded in the multiple flow holes in a one-to-one correspondence.

[0018] Preferably, the sealing device includes: a sealing plug cap and a sealing plug;

[0019] The sealing plug is disposed at the inlet end of the external T-shaped short section of the coiled tubing, and the sealing plug is provided with a first cable core passage for mating with the cable core;

[0020] The sealing plug cap is disposed at the inlet end of the external T-shaped short section of the continuous tubing and abuts against the top of the sealing plug, and the sealing plug cap is provided with a second cable core passage for cooperating with the cable core.

[0021] Preferably, it further includes: an inner conversion section within the rotary joint;

[0022] The inlet end of the internal conversion section of the rotary joint is connected to the rotary joint body.

[0023] The outlet end of the inner conversion section of the rotary joint is connected to the inlet end of the outer T-shaped section of the continuous tubing; the treatment fluid can pass through the rotary joint and flow sequentially through the rotary joint body and the inlet end of the inner conversion section of the rotary joint.

[0024] Preferably, the slip ring assembly includes: a moving slip ring and a stationary slip ring;

[0025] Both the moving slip ring and the stationary slip ring are electric slip rings; one end of the cable core passes through the stationary slip ring.

[0026] Preferably, the slip ring assembly further includes: a slip ring fixing bracket for mounting on the roller support; the moving slip ring is mounted on the rotary joint body; and the stationary slip ring is mounted on the slip ring fixing bracket.

[0027] A coiled tubing roller assembly includes: a roller, a roller shaft, and a rotary joint. The rotary joint is a coiled tubing cable rotary joint as described above. The roller is sleeved on one end of the roller shaft, and the rotary joint body of the coiled tubing cable rotary joint is connected to the other end of the roller shaft.

[0028] A coiled tubing vehicle includes a roller assembly, wherein the roller assembly is a coiled tubing roller assembly as described above.

[0029] As can be seen from the above technical solution, the coiled tubing rotary joint provided by the present invention integrates the treatment fluid passage and the cable core circuit into the rotary joint body, so that the two paths are set on the same side of the drum shaft. This avoids the separate setting of the two paths as in the prior art, and eliminates the need for chain drive (correspondingly, the other side of the drum shaft can be driven by a hydraulic motor). This design can greatly reduce the construction cost and the workload. Of course, on this basis, the present solution can not only pump treatment fluid for well workover operations to reduce labor intensity, but also transmit the monitoring signal data of the coiled tubing bottom logging instrument to the surface, realizing wired logging. This makes it convenient for operators to adjust the working parameters according to the bottom hole information, thus facilitating the operators to quickly respond to the changes that occur during the operation.

[0030] The present invention also provides a continuous tubing roller device, which has corresponding beneficial effects due to the use of the above-mentioned continuous tubing cable rotary joint, as can be referred to the previous description, and will not be repeated here.

[0031] The present invention also provides a continuous tubing vehicle, which has corresponding beneficial effects due to the use of the above-mentioned continuous tubing roller device, as can be seen from the previous description, and will not be repeated here. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of the coiled tubing drum device provided in an embodiment of the present invention;

[0034] Figure 2 AA is the cross-sectional view of the cable clamp;

[0035] Figure 3 for Figure 1 A magnified view of a portion of the image, B.

[0036] Among them, 1 is the drum, 2 is the continuous tubing, 3 is the drum shaft, 4 is the sealing plug cap, 5 is the sealing plug, 6 is the external T-type short section of the continuous tubing, 7 is the cable core, 8 is the cable clamp, 9 is the rotary joint body, 10 is the drum support, 11 is the bearing, 12 is the slip ring fixing support, 13 is the slip ring assembly, 14 is the inner conversion short section of the rotary joint, 15 is the rotary joint, 16 is the flow hole, 17 is the tapered sleeve, 18 is the moving slip ring, and 19 is the stationary slip ring. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] The continuous tubing rotary joint for cable connection provided in this embodiment of the invention, such as... Figure 1 As shown, it includes: a coiled tubing external T-type short section 6, a cable core 7, a cable clamp 8, a rotary joint body 9, a slip ring assembly 13, a rotary joint 15, and a sealing device;

[0039] The rotary joint body 9 is used to connect the drum shaft 3; the rotary joint 15 is connected to the rotary joint body 9; the inlet end of the continuous tubing external T-type short section 6 is connected to the rotary joint body 9; the treatment fluid can pass through the rotary joint 15 and flow sequentially through the rotary joint body 9 and the inlet end of the continuous tubing external T-type short section 6.

[0040] One end of the cable clamp 8 is connected to the outlet end of the external T-shaped short section 6 of the coiled tubing, and the other end is used to connect to the coiled tubing 2;

[0041] The slip ring assembly 13 is located on the rotary joint body 9; the cable core 7 is fitted with the slip ring assembly 13, and the cable core 7 passes through the inlet end of the coiled tubing external T-type short section 6, the outlet end of the coiled tubing external T-type short section 6, and is fitted with the cable clamp 8; the sealing device is located between the inlet end of the coiled tubing external T-type short section 6 and the cable core 7.

[0042] It should be noted that the rotary joint 15 has a first processing fluid channel for adding processing fluid; the rotary joint body 9 has a second processing fluid channel, the inlet end of which is connected to the outlet end of the first processing fluid channel, and the outlet end of the second processing fluid channel is connected to the inlet end of the coiled tubing external T-shaped sub 6. Furthermore, the cable core 7 passes through the cable clamp 8 and enters the interior of the coiled tubing 2, so as to descend with the coiled tubing 2 to the bottom of the well for data transmission. Additionally, the sealing device prevents leakage of processing fluid from the inlet end of the coiled tubing external T-shaped sub 6. Meanwhile, the other end of the drum shaft 3, away from the rotary joint body 9, is driven by a hydraulic motor.

[0043] As can be seen from the above technical solution, the coiled tubing rotary joint provided by the present invention integrates the treatment fluid passage and the cable core circuit into the rotary joint body, so that the two paths are set on the same side of the drum shaft. This avoids the separate setting of the two paths as in the prior art, and eliminates the need for chain drive (correspondingly, the other side of the drum shaft can be driven by a hydraulic motor). This design can greatly reduce the construction cost and the workload. Of course, on this basis, the present solution can not only pump treatment fluid for well workover operations to reduce labor intensity, but also transmit the monitoring signal data of the coiled tubing bottom logging instrument to the surface, realizing wired logging. This makes it convenient for operators to adjust the working parameters according to the bottom hole information, thus facilitating the operators to quickly respond to the changes that occur during the operation.

[0044] Specifically, such as Figure 2 As shown, the continuous tubing rotary joint for cable provided in this embodiment of the invention further includes: a tapered sleeve 17; the tapered sleeve 17 is disposed inside the end of the cable clamp 8 near the outlet end;

[0045] The tapered sleeve 17 is provided with a cable core through hole for mating with the cable core 7, so that the cable core 7 can pass through the cable core through hole and enter the interior of the coiled tubing 2; the tapered sleeve 17 is provided with a flow hole 16; the coiled tubing cable rotary joint provided in this embodiment of the invention also includes: a flow tube embedded in the flow hole 16 for mating with the treatment fluid, so that the treatment fluid can enter the coiled tubing 2 through the flow tube. In addition, in order to ensure the service life of the flow tube, the flow tube is preferably a stainless steel metal tube. In addition, in order to achieve a lightweight design of the tapered sleeve 17 and to facilitate the machining of the cable core through hole and the flow hole 16, the material of the tapered sleeve 17 is rubber or bakelite. In this solution, the outer wall of the tapered sleeve 17 forms a tight fit with the inner wall of the cable clamp 8, so that the tapered sleeve 17 can be clamped in one end of the cable clamp 8, so as to provide a solid flow channel for the treatment fluid and a solid passage channel for the cable core 7.

[0046] To further optimize the above technical solution, the number of flow holes 16 is multiple, and they are evenly distributed around the through holes of the cable core. Correspondingly, the number of flow pipes is multiple, and multiple flow pipes are embedded in multiple flow holes 16 one by one. This design not only increases the flow rate of the treatment fluid, but also helps to achieve a uniform pumping effect of the treatment fluid.

[0047] In this plan, such as Figure 1 As shown, the sealing device includes: a sealing plug cap 4 and a sealing plug 5;

[0048] The sealing plug 5 is installed at the inlet end of the T-shaped short section 6 of the continuous tubing, and the sealing plug 5 is provided with a first cable core passage for cooperating with the cable core 7 to ensure the normal passage of the cable core 7.

[0049] The sealing plug cap 4 is set at the inlet end of the T-shaped short section 6 of the continuous tubing and abuts against the top of the sealing plug 5 to press the sealing plug 5, which can further enhance the sealing effect of the inlet end; and the sealing plug cap 4 is provided with a second cable core passage for cooperating with the cable core 7, so as to ensure the normal passage of the cable core 7.

[0050] Specifically, such as Figure 1 As shown, the continuous tubing cable rotary joint provided in this embodiment of the invention further includes: an inner conversion section 14 of the rotary joint;

[0051] The inlet end of the rotary joint inner conversion section 14 is connected to the rotary joint body 9, and the outlet end of the rotary joint inner conversion section 14 is connected to the inlet end of the coiled tubing external T-type section 6. The treatment fluid can pass through the rotary joint 15 and flow sequentially through the rotary joint body 9 and the inlet end of the rotary joint inner conversion section 14. This solution adjusts the installation posture of the coiled tubing external T-type section 6 by introducing the rotary joint inner conversion section 14, so that the outlet end of the coiled tubing external T-type section 6 is radially distributed along the drum shaft 3, so that the cable clamp 8 can be better connected between the outlet end of the coiled tubing external T-type section 6 and the coiled tubing 2. Further, as Figure 1 As shown, the left end of the inner conversion section 14 of the rotary joint is a high-pressure free connector, used to connect the external T-type short section 6 of the coiled tubing; in addition, the lower end of the inner conversion section 14 of the rotary joint is also a high-pressure free connector.

[0052] In this plan, such as Figure 3 As shown, the slip ring assembly 13 includes a moving slip ring 18 and a stationary slip ring 19; both the moving slip ring 18 and the stationary slip ring 19 are electric slip rings; one end of the cable core 7 passes through the stationary slip ring 19. The slip ring assembly 13 is designed so that the cable core 7 can transmit monitoring signals when the drum shaft 3 rotates continuously without restriction.

[0053] To further optimize the above technical solutions, such as Figure 1 As shown, the slip ring assembly 13 also includes: a slip ring fixing bracket 11 for mounting on the roller bracket 10; a moving slip ring 18 mounted on the rotary joint body 9 to realize the "rotor" function of the moving slip ring 18; of course, the moving slip ring 18 and the rotary joint body 9 are coaxially mounted; and a stationary slip ring 19 mounted on the slip ring fixing bracket 11 to realize the "stator" function of the stationary slip ring 19.

[0054] This invention also provides a continuous tubing drum device, such as... Figure 1 As shown, the device includes: a roller 1, a roller shaft 3, and a rotary joint. The rotary joint is a coiled tubing cable rotary joint as described above. The roller 1 is sleeved on one end of the roller shaft 3, and the rotary joint body 9 of the coiled tubing cable rotary joint is connected to the other end of the roller shaft 3. Because this solution uses the aforementioned coiled tubing cable rotary joint, it has corresponding beneficial effects, as detailed above, which will not be repeated here. This solution is particularly suitable for vehicle-mounted coiled tubing roller devices.

[0055] This invention also provides a coiled tubing vehicle, including a roller assembly, which is the coiled tubing roller assembly described above. Since this solution uses the aforementioned coiled tubing roller assembly, it has corresponding beneficial effects, as detailed above, and will not be repeated here.

[0056] The following is a further description of this solution with reference to specific embodiments:

[0057] The technical solution of the present invention:

[0058] like Figure 1 As shown, a coiled tubing roller assembly includes: a roller 1, a coiled tubing 2, a roller shaft 3, a sealing device, a cable core 7, and a rotary joint body 9. One end of the roller shaft 3 is fitted with the roller 1, and the other end is connected to the rotary joint body 9. The coiled tubing 2 is wound around the roller 1. One end of the rotary joint body 9 is connected to a rotary joint 15, and the upper part of the other end is connected to an inner conversion section 14. The inner conversion section 14 is connected to an outer T-shaped section 6 of the coiled tubing. The sealing device is used to seal the area above the outer T-shaped section 6. A cable clamp 8 is provided below the outer T-shaped section 6. A slip ring assembly 13 is provided at one end of the rotary joint body 9 near the rotary joint 15. One end of the cable core 7 is connected to the slip ring assembly 13, and the other end passes through the sealing device, the outer T-shaped section 6 of the coiled tubing, and is connected to the cable clamp 8.

[0059] Furthermore, the slip ring assembly 13 includes a moving slip ring 18 and a stationary slip ring 19; the moving slip ring 18 and the stationary slip ring 19 are electric slip rings.

[0060] Furthermore, the sealing device includes a sealing plug cap 4 and a sealing plug 5; the sealing plug cap 4 is disposed on the sealing plug 5; the sealing plug cap 4 has a channel through which the cable core 7 passes; the lower end of the sealing plug 5 also has a channel through which the cable core 7 is fixedly passed.

[0061] Furthermore, the upper cross-section of the cable clamp 8 is circular; a tapered sleeve 17 is provided at the upper end of the cable clamp 8; a cable core through hole is provided at the center of the upper end of the cable clamp 8; and multiple flow holes 16 are provided around the cable core through hole.

[0062] Furthermore, the roller 1 is fixed to the roller support 10 by bearing 11.

[0063] Furthermore, the continuous tubing roller assembly also includes: a slip ring fixing bracket 12; the slip ring fixing bracket 12 is used to fix the slip ring; the slip ring fixing bracket 12 is connected to the roller bracket 10.

[0064] During operation, the treatment fluid flows through the rotary joint 15, then sequentially through the rotary joint body 9, the inner conversion section 14 of the rotary joint, and the outer T-section 6 of the coiled tubing, before entering the coiled tubing 2 through the flow passage 16 (flow pipe), thus realizing the function of pumping the treatment fluid. Furthermore, this invention can also transmit downhole data via cable to provide wellbore information to operators, enabling them to quickly respond to changes that occur during operation by adjusting working parameters.

[0065] The beneficial effects of this invention are:

[0066] This invention has a simple structure and reasonable design. It replaces the rotary joint of the original vehicle-mounted coiled tubing drum, which can not only pump treatment fluid for well workover operations, but also transmit the monitoring signal data of the bottom logging instrument of the coiled tubing to the surface, realizing wired logging, thereby reducing labor intensity and construction costs.

[0067] In summary, this invention discloses a coiled tubing roller device. One end of the roller shaft is fitted with a roller, and the other end is connected to a rotary joint body. Coiled tubing is wound around the roller. One end of the rotary joint body is connected to a swivel joint, and the upper part of the other end is connected to an inner conversion short section of the rotary joint. The inner conversion short section of the rotary joint is connected to an outer T-shaped short section of the coiled tubing. A sealing device is used to seal the area above the outer T-shaped short section of the coiled tubing. A cable clamp is installed below the outer T-shaped short section of the coiled tubing. A slip ring is installed at one end of the rotary joint body near the swivel joint. One end of the cable core is connected to the slip ring, and the other end passes through the sealing device, the outer T-shaped short section of the coiled tubing, and the cable clamp. This invention replaces the rotary joint of the original vehicle-mounted coiled tubing roller, enabling both the pumping of treatment fluid for well workover operations and the transmission of monitoring signal data from the bottom logging instruments of the coiled tubing to the surface, achieving wired logging and reducing labor intensity and construction costs.

[0068] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0069] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rotary joint for continuous tubing via cable, characterized in that, include: The coiled tubing external T-type short section (6), cable core (7), cable clamp (8), rotary joint body (9), slip ring assembly (13), rotary joint (15) and sealing device; The rotary joint body (9) is used to connect the drum shaft (3); the rotary joint (15) is connected to the rotary joint body (9); the inlet end of the continuous oil pipe external T-shaped short section (6) is connected to the rotary joint body (9); the treatment fluid can pass through the rotary joint (15) and flow sequentially through the rotary joint body (9) and the inlet end of the continuous oil pipe external T-shaped short section (6); One end of the cable clamp (8) is connected to the outlet end of the coiled tubing external T-shaped short section (6), and the other end is used to connect to the coiled tubing (2); The slip ring assembly (13) is disposed on the rotary joint body (9); the cable core (7) is fitted with the slip ring assembly (13), and the cable core (7) passes through the inlet end of the coiled tubing external T-shaped short section (6), the outlet end of the coiled tubing external T-shaped short section (6), and is fitted with the cable clamp (8); the sealing device is disposed between the inlet end of the coiled tubing external T-shaped short section (6) and the cable core (7); The passage of the treatment fluid and the wiring of the cable core (7) are integrated in the rotary joint body (9), and the other end of the roller shaft (3) away from the rotary joint body (9) is driven by a hydraulic motor.

2. The rotary joint for continuous tubing via cable according to claim 1, characterized in that, Also includes: Tapered sleeve (17); the tapered sleeve (17) is disposed inside the end of the cable clamp (8) near the outlet end; The tapered sleeve (17) is provided with a cable core through hole for cooperating with the cable core (7), and the tapered sleeve (17) is provided with a flow hole (16) for cooperating with the treatment liquid; The continuous tubing rotary joint for cable also includes a flow pipe embedded in the flow hole (16) for use with the treatment fluid.

3. The rotary joint for continuous tubing via cable according to claim 2, characterized in that, The number of the flow holes (16) is multiple, and they are evenly distributed around the through holes of the cable core; The number of flow tubes is multiple, and the multiple flow tubes are embedded in the multiple flow holes (16) one by one.

4. The rotary joint for continuous tubing via cable according to claim 1, characterized in that, The sealing device includes: a sealing plug cap (4) and a sealing plug (5); The sealing plug (5) is located at the inlet end of the external T-shaped short section (6) of the continuous tubing, and the sealing plug (5) is provided with a first cable core passage for cooperating with the cable core (7); The sealing plug cap (4) is located at the inlet end of the external T-shaped short section (6) of the coiled tubing and abuts against the top of the sealing plug (5). The sealing plug cap (4) is provided with a second cable core passage for cooperating with the cable core (7).

5. The rotary joint for continuous tubing via cable according to claim 1, characterized in that, Also includes: Rotary joint internal conversion section (14); The liquid inlet end of the inner conversion section (14) of the rotary joint is connected to the rotary joint body (9). The outlet end of the inner conversion section (14) of the rotary joint is connected to the inlet end of the outer T-shaped section (6) of the continuous tubing; the treatment fluid can pass through the rotary joint (15) and flow sequentially through the rotary joint body (9) and the inlet end of the inner conversion section (14) of the rotary joint.

6. The rotary joint for continuous tubing via cable according to claim 1, characterized in that, The slip ring assembly (13) includes: a moving slip ring (18) and a stationary slip ring (19); Both the moving slip ring (18) and the stationary slip ring (19) are electric slip rings; one end of the cable core (7) passes through the stationary slip ring (19).

7. The rotary joint for continuous tubing via cable according to claim 6, characterized in that, The slip ring assembly (13) further includes: a slip ring fixing bracket (11) for mounting on the roller bracket (10); the moving slip ring (18) is mounted on the rotary joint body (9); and the stationary slip ring (19) is mounted on the slip ring fixing bracket (11).

8. A coiled tubing roller assembly, comprising: The rotating joint is characterized in that the rotating joint is a continuous tubing cable rotating joint as described in any one of claims 1-7, the roller (1) is sleeved on one end of the roller shaft (3), and the rotating joint body (9) of the continuous tubing cable rotating joint is connected to the other end of the roller shaft (3).

9. A coiled tubing unit, comprising: The roller device is characterized in that the roller device is the continuous tubing roller device as described in claim 8.

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