Continuous pipe arranging device, system and method applied to deep sea

Abstract

The invention provides a continuous pipe arranging device, system and method applied to deep sea, the continuous pipe arranging device comprises a roller body unit, a guide unit, a displacement unit and an axial displacement control system; the displacement unit comprises a frame, a hydraulic cylinder and an axial displacement control system; the roller body unit comprises a cylinder structure used for winding the coiled tubing and a roller rotation driving system used for driving the cylinder structure to rotate. The guide unit is installed on the frame and surrounds the upper portion of the roller body unit. The displacement control system comprises an absolute value encoder, a displacement sensor and a controller, and the controller is connected with the absolute value encoder and the displacement sensor and used for associating the number of release turns of the continuous pipe with the axial displacement amount of the hydraulic cylinder so that the axial displacement amount of the hydraulic cylinder can be equal to the diameter of one continuous pipe every time the continuous pipe is released by one circle. According to the invention, the continuous pipe can be automatically arranged in a deepwater seabed environment.

Description

Technical Field

[0001] The present application relates to the technical field of offshore oil equipment, and in particular to a continuous pipe arrangement device, system and method for deep sea use. Background Art

[0002] Coiled tubing is also known as flexible tubing, and coiled tubing operators are known as "universal operating equipment" and are widely used in well repair, production increase, and drilling. In recent years, the application of coiled tubing technology and equipment has continued to move towards deep, ultra-deep, unconventional, new energy, deep sea and other fields, and the operation volume and operation effect have become increasingly significant. Due to its unique advantages such as low pollution, small footprint, and pressure-operated operation, coiled tubing operators are also known as "universal operating machines" and are an indispensable engineering tool in oil and gas field exploration and development.

[0003] The coiled tubing operation machine is mainly composed of key components such as the injection head, control room, drum and coiled tubing. The drum component is mainly used to transport the coiled tubing and lay the tubing during the operation. The coiled tubing needs to be neatly arranged on the drum component during the lifting and lowering process. The injection head is mainly used to provide power for lifting and lowering the coiled tubing. At present, most of the common roller coiled tubing laying systems use a mechanical screw transmission method, that is, the rotation of the drum drives the screw to rotate, and the pipe laying trolley slides left and right with the screw to complete the pipe laying work. In order to facilitate the work, there is often a distance between the injection head and the pipe laying device so that the coiled tubing can be smoothly introduced into the well.

[0004] However, for oil well exploration in complex application scenarios, due to limited operating space and visual information acquisition, large changes in external pressure, etc., conventional pipe laying systems are difficult to adapt to more complex application environments. In order to better improve the application scope of coiled tubing technology and improve the efficiency of coiled tubing operations, it is urgent to carry out research on automatic coiled tubing laying technology for different environments. Summary of the invention

[0005] In order to solve the problem that coiled tubing equipment cannot lay coiled tubing in the conventional way on land in deep-water seabed environment, and realize automatic coiled tubing laying in deep-water seabed environment, this application proposes a coiled tubing laying device, system and method for deep-sea, and adopts the following technical solutions:

[0006] In a first aspect, the present application discloses a coiled tube arrangement device for deep sea use, the coiled tube arrangement device comprising a drum unit, a guide unit, a displacement unit and an axial displacement control system;

[0007] The displacement unit comprises a frame, a hydraulic cylinder and an axial displacement control system, wherein the hydraulic cylinder is used to drive the drum unit to move in a direction parallel to its central axis;

[0008] The drum unit comprises a cylindrical structure for winding the continuous pipe and a drum rotation driving system for driving the cylindrical structure to rotate, and the cylindrical structure is installed on the frame;

[0009] The drum rotation drive system comprises a hydraulic oil tank, a drum hydraulic pump, a drum rotation drive member and a first compensator, wherein the hydraulic oil tank is connected to the first compensator, and the drum hydraulic pump is connected to the hydraulic oil tank and the drum rotation drive member to provide power hydraulic oil to the drum rotation drive member to drive the cylindrical structure to rotate;

[0010] The guide unit is installed on the frame and surrounds the drum unit, and is used to guide the coiled tube along the cylindrical structure to the direction to be lowered;

[0011] The axial displacement control system includes an absolute value encoder, a displacement sensor and a controller;

[0012] The absolute encoder is installed at the end of the central axis of the reel, and is used to mark the position of each layer and each circle of the coiled tube on the drum body, so as to obtain the number of coiled tube release circles;

[0013] The displacement sensor is connected to the hydraulic cylinder and is used to obtain the axial displacement of the hydraulic cylinder;

[0014] The controller is connected to the absolute encoder and the displacement sensor respectively, and is used to associate the number of coiled tubing release turns with the axial displacement of the hydraulic cylinder, so that for each coiled tubing release turn, the axial displacement of the hydraulic cylinder is one coiled tubing diameter.

[0015] Optionally, the guide unit includes a multi-axis rotating pressure box, a guide rail and a hydraulic pressure box;

[0016] The multi-axis rotating pressure box is located outside the cylindrical structure, and can rotate around the axis parallel to and perpendicular to the central axis of the cylindrical structure to accommodate the continuous pipe with a deflection angle, and is used to guide the continuous pipe to go around the guide rail along the cylindrical structure; the guide rail surrounds the top of the drum unit, and is used to guide the continuous pipe to go around the cylindrical structure to the direction to be lowered; the hydraulic pressure box is used to confine the continuous pipe within the guide rail.

[0017] Optionally, the multi-axis rotating press box includes a bracket, a first pin, a swinging portion and a second pin. The bracket is installed on the frame through the first pin and can swing around the first pin to adjust the winding direction of the continuous tube; the swinging portion is installed on the bracket through the second pin and can swing around the second pin to adjust the winding direction of the continuous tube.

[0018] Optionally, a sliding component is provided on the guide unit bracket, and the guide component can move along the axial direction of the drum body unit under the action of the sliding component.

[0019] Optionally, the guide rail is a track with a groove surrounding the top of the drum body unit, the guide rail is fixed on the frame, and at least one hydraulic pressure box is provided on the guide rail;

[0020] The hydraulic pressure box comprises a hydraulic drive assembly and a limiting member, and the limiting member cooperates with the groove of the guide rail to limit the continuous tube.

[0021] Optionally, a sliding assembly is provided on the frame of the displacement unit; wherein:

[0022] A slide groove is arranged on the frame, and the sliding component is a slider with a slide rail; or a slide rail is arranged on the frame structure, and the sliding component is a slider with a slide groove;

[0023] The roller body unit is connected to the slider. Through the cooperation of the slide groove and the slide rail, the hydraulic cylinder can push the slider to move. Driven by the slider, the roller body unit can move along the axial direction of the cylindrical structure, so that the roller body unit can slide relative to the frame.

[0024] Optionally, the drum rotation drive system further includes a reducer and a second compensator connected to the reducer, wherein the reducer is connected to the drum rotation drive member and is used to reduce the speed and increase the torque of the drum rotation drive member.

[0025] In a second aspect, the present application discloses a coiled tubing operation system, comprising: a system support, an injection head, and a coiled tubing arrangement device as described in the first aspect;

[0026] The injection head and the coiled tube arrangement device are installed on the system support.

[0027] The cylindrical structure of the coiled tube arrangement device is used to wind the coiled tube, and the guide unit guides the coiled tube along the cylindrical structure to wind toward the injection head.

[0028] Optionally, the injection head includes a lifting and lowering clamping device and a bell mouth;

[0029] The bell mouth is located at the upper part of the injection head and is used to guide the coiled tubing into the tripping and clamping device;

[0030] The lifting and lowering clamping device is used to drive the coiled tubing to move upward or downward to achieve lifting and lowering of the coiled tubing.

[0031] In a third aspect, the present application further discloses a method for using the coiled tubing operation system as described in the second aspect, comprising:

[0032] Use an absolute encoder to mark the position of each layer and each circle of the coiled tube on the drum body to obtain the number of coiled tube release circles;

[0033] The controller controls the displacement of the hydraulic cylinder according to the number of coiled tubing releases, so that for each coiled tubing release, the distance moved by the cylindrical structure is exactly equal to the outer diameter of the tubing.

[0034] The free end of the continuous tube wound on the cylindrical structure passes through the multi-axis rotating press box of the guide unit and winds along the guide rail toward the injection head;

[0035] The free end of the coiled tubing passes through the tripping and lowering clamping device of the injection head and is lowered into the wellbore.

[0036] In a fourth aspect, the present application further discloses an application of the continuous pipe arrangement device as described in the first aspect in the deep sea.

[0037] Based on the above technical solution, the beneficial effects of this application compared with the prior art are as follows:

[0038] In the embodiment of the present application, the continuous pipe laying device used in the deep sea adjusts the installation position of the guide unit so that it is installed on the same frame as the drum unit and surrounds the drum unit, thereby shortening the installation distance between the drum unit and the injection head, and accurately guiding the continuous pipe into the injection head within a limited space, thereby reducing the requirement for the size of the installation space; at the same time, an underwater hydraulic compensation drive system is used to drive the drum to rotate, so that the pipe laying device can better adapt to the huge changes in external pressure, and an encoder and a sensor are used to associate the rotation angle of the drum unit with the displacement distance of the displacement unit, so as to improve the efficiency of collecting and laying the continuous oil pipe on the drum, thereby making the pipe laying device suitable for pipe laying operations on the deep seabed. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a schematic diagram of the three-dimensional structure of the coiled tube drum device in the embodiment of the present application;

[0040] Figure 2 This is a front view of the coiled tube drum device in the embodiment of the present application;

[0041] Figure 3 for Figure 1 A magnified schematic diagram of the middle A area;

[0042] Figure 4 It is a schematic diagram of the three-dimensional structure of the multi-axis rotating press box in the embodiment of the present application;

[0043] Figure 5 This is a structural diagram of a coiled tubing operation system in an embodiment of the present application. Explanation of reference numerals:

[0044] Figure 6 This is a schematic diagram of a drum rotation drive system in an embodiment of the present application;

[0045] Figure 7This is a flow chart of the method for using the coiled tubing operation system in the embodiment of the present application;

[0046] 1. Drum unit; 2. Displacement unit; 3. Guide unit; 4. Continuous tube; 5. Injection head;

[0047] 101, cylindrical structure; 102, drum rotation drive system; 103, drum bracket; 201, frame; 202, hydraulic cylinder; 301, multi-axis rotation pressure box; 302, guide rail; 303, hydraulic pressure box;

[0048] 311, bracket; 312, first pin shaft; 313, swinging part; 314, second pin shaft;

[0049] 51. Bell mouth; 52. Lifting and lowering clamping device;

[0050] 61. Absolute encoder; 62. Displacement sensor. DETAILED DESCRIPTION

[0051] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0052] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0053] In the description of the present disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0054] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0055] As humans develop and utilize oil and gas resources, oil and gas exploration and development have shifted from land to the ocean. Therefore, oil extraction operations must also be carried out in the vast ocean. The inventors have discovered that, at present, when oil and gas drilling construction is carried out at sea, it is usually achieved through deep-sea drilling platforms, which are equipped with multiple drilling rigs for drilling operations. However, due to different equipment layout methods, limited visual information acquisition, underwater high pressure and other reasons, conventional pipe laying systems cannot adapt to underwater environments, that is, in deep-water seabed environments, continuous pipe equipment usually cannot perform continuous pipe laying in the conventional way on land.

[0056] In order to solve the problem that coiled tubing equipment cannot lay coiled tubing in the conventional way on land in a deep-water seabed environment, realize automatic coiled tubing laying in a deep-water seabed environment, and support the application of coiled tubing technology in the deep-water seabed, the embodiments of the present application provide a coiled tubing laying device, system and method for deep-sea application. One or more embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.

[0057] In the first aspect, the present application discloses a continuous pipe arrangement device for deep sea use, referring to Figure 1The coiled tube arrangement device comprises a drum unit 1, a displacement unit 2, a guide unit 3 and an axial displacement control system. The displacement unit 2 comprises a frame 201, a hydraulic cylinder 202 and an axial displacement control system, wherein the hydraulic cylinder 202 is used to drive the drum unit 1 to move in a direction parallel to its central axis; the drum unit 1 comprises a cylindrical structure 101 for winding the coiled tube 4 and a drum rotation drive system 102 for driving the cylindrical structure 101 to rotate, wherein the cylindrical structure 101 is mounted on the frame 201; the guide unit 3 is mounted on the frame 201 and surrounds the drum unit 1, and is used to guide the coiled tube 4 to rotate along the cylindrical structure 101 to the direction to be lowered. The displacement control system includes an axial displacement control system including an absolute value encoder 61, a displacement sensor 62 and a controller; the absolute value encoder 61 is installed at the end of the central axis of the cylindrical structure 101, and is used to mark the position of each layer and each circle of the coiled tube on the cylindrical structure 101, so as to obtain the number of coiled tube release circles; the displacement sensor 62 is connected to the hydraulic cylinder, and is used to obtain the axial displacement of the hydraulic cylinder; the controller is connected to the absolute value encoder 61 and the displacement sensor 62, respectively, and is used to associate the number of coiled tube release circles with the axial displacement of the hydraulic cylinder, so that for each coiled tube release circle, the axial displacement of the hydraulic cylinder is one coiled tube diameter.

[0058] In some optional embodiments, referring to Figure 1 The drum unit 1 further includes a drum support 103, which is mounted on the frame 201. The cylindrical structure 101 is further mounted on the drum support 103 and rotates around its central axis under the drive of the drum rotation drive system 102. The cylindrical structure 101 is a cylindrical structure 101 welded from steel structural parts, which is used to wind and store the continuous pipe 4 for operation. The drum rotation drive system 102 provides power to support the rotation of the cylindrical structure 101, so that the drum unit 1 can wind / release the continuous pipe 4.

[0059] In the embodiment of the present application, the continuous pipe laying device for deep sea is configured to adjust the installation position of the guide unit 3 so that the guide unit 3 is installed on the same frame 201 as the drum unit 1 and surrounds the drum unit 1, thereby reducing the installation distance between the drum unit 1 and the injection head 5. The continuous pipe 4 can be accurately introduced into the injection head 5 within a limited space, thereby reducing the requirement for the size of the installation space. At the same time, an underwater hydraulic compensation drive system is used to drive the drum to rotate, so that the pipe laying device can better adapt to the huge changes in external pressure. An absolute encoder 61 and a displacement sensor 62 are used to associate the rotation angle of the drum unit with the displacement distance of the displacement unit 2, so as to improve the efficiency of collecting and laying the continuous oil pipe on the drum, thereby making the pipe laying device suitable for pipe laying operations on the deep seabed.

[0060] In an optional embodiment, the displacement unit 2 is installed at the lower end of the drum unit 1, and is a frame structure composed of steel structural members and hydraulic cylinders 202. When the coiled tubing 4 is wound out of the drum unit 1, the displacement unit 2 moves in accordance with the rotation speed of the drum, guides the coiled tubing 4 to enter the guide unit 3 in an orderly manner, and connects with other coiled tubing 4 operation devices.

[0061] Specifically, refer to Figure 1 , the two ends of the hydraulic cylinder 202 are fixedly mounted on the frame 201, and the hydraulic cylinder 202 is connected to the drum unit 1 through a flange. The position of each layer and each circle of the continuous tube 4 on the cylindrical structure 101 has a unique corresponding relationship with the absolute encoder 61. The absolute encoder 61 is installed on the axial end of the cylindrical structure 101, and can obtain the rotation angle of the cylindrical structure 101 in real time to determine the number of circles of the continuous tube 4 released. The displacement sensor 62 can be installed on the hydraulic cylinder 202 or on the frame 201. The displacement sensor 62 can adjust the extension of the hydraulic cylinder 202 according to the rotation angle of the cylindrical structure 101 of the drum unit 1. The cylindrical structure 101 needs to be displaced axially by a distance of the diameter of the continuous tube 4 for each circle of rotation. This ensures that the continuous tube 4 is neatly and orderly wound into / out of the cylindrical structure 101, so as to ensure that the continuous tube 4 can be neatly discharged when entering and exiting the drum device, thereby reducing the interaction force between the continuous tubes 4 and extending the service life of the continuous tube 4. Since the drum rotation and the axial displacement of the drum body unit 1 are no longer connected in series through mechanical transmission, the requirement for installation space is further reduced, making the device as a whole more suitable for deep-water seabed operating environments.

[0062] In some optional embodiments, referring to Figure 1 The frame 201 of the displacement unit 2 is provided with a sliding assembly, a slide groove can be provided on the frame 201, and the sliding assembly is a slider with a slide rail; a slide rail can also be provided on the frame 201 structure, and the sliding assembly is a slider with a slide groove; the roller unit 1 is connected to the slider, and through the cooperation of the slide groove and the slide rail, the hydraulic cylinder 202 can push the slider to move, and the roller unit 1 can move along the axial direction of the cylindrical structure 101 under the drive of the slider, so that the roller unit 1 can slide relative to the frame 201. The frame 201 is welded with steel structural parts.

[0063] In an alternative embodiment, referring to Figure 1-Figure 4The guide unit 3 is installed on the frame 201, and the guide unit 3 includes a multi-axis rotating press box 301, a guide rail 302 and a hydraulic pressure box 303; the multi-axis rotating press box 301 is located outside the cylindrical structure 101, and can rotate around the axis parallel to and perpendicular to the central axis of the cylindrical structure 101 to adapt to the continuous tube 4 with a deflection angle, and is used to guide the continuous tube 4 along the cylindrical structure 101 to go around the guide rail 302; the guide rail 302 surrounds the top of the drum unit 1, and is used to guide the continuous tube 4 along the cylindrical structure 101 to go around to the direction to be lowered; the hydraulic pressure box 303 is used to limit the continuous tube 4 within the guide rail 302.

[0064] The above pipe laying device can be used in deep water seabed or similar limited space operation environment. The drum unit 1 is used to wind the coiled pipe 4, the displacement unit 2 hydraulically guides the coiled pipe 4 to be neatly laid out, and the guide unit 3 hydraulically guides the coiled pipe 4 to surround the drum. The structure of the coiled pipe laying device overcomes the flexibility of the coiled pipe 4, so that the coiled pipe 4 can pass smoothly through the drum device and other coiled pipe 4 operation devices, ensuring the normal operation of the coiled pipe 4.

[0065] In some optional embodiments, referring to Figure 1 The guide unit 3 is installed around the drum unit 1, serving as a channel for the coiled tube 4 to guide the coiled tube 4 in and out of the drum unit and connect with other devices for working with the coiled tube 4. The multi-axis rotating press box 301 can rotate around two axes to receive the coiled tube 4 within a certain deflection angle, guide the coiled tube 4 into the guide rail 302, and restrict the movement of the coiled tube 4 in the guide rail 302 through the hydraulic press box 303.

[0066] Specifically, refer to Figure 3 and Figure 4 The multi-axis rotating press box 301 includes a bracket 311, a first pin shaft 312, a swinging portion 313 and a second pin shaft 314. The bracket 311 is installed on the frame 201 through the first pin shaft 312, and can swing around the first pin shaft 312 to adjust the winding direction of the continuous tube 4; the swinging portion 313 is installed on the bracket 311 through the second pin shaft 314, and can swing around the second pin shaft 314 to adjust the winding direction of the continuous tube 4.

[0067] In some optional embodiments, a sliding assembly is provided on the bracket 311 , and under the action of the sliding assembly, the multi-axis rotating press box 301 can move in a direction parallel to the central axis of the cylindrical structure 101 of the drum body unit 1 .

[0068] Reference Figure 1 and Figure 3The multi-axis rotating press box 301 is installed on the back of the drum unit 1 (with the direction of the operating wellhead as the positive direction), the bracket 311 is installed on the frame 201 through the first pin shaft 312, the bracket 311 can rotate around the first pin shaft 312, the swing part 313 is installed on the bracket 311 through the second pin shaft 314, the swing part 313 can rotate around the second pin shaft 314, and a continuous pipe 4 hole is provided on the swing part 313. The continuous pipe 4 can pass through the continuous pipe 4 hole and go around the guide rail 302. The multi-axis rotating press box 301 can adjust the winding direction of the continuous pipe 4 within a certain range.

[0069] In some optional embodiments, the guide rail 302 is a track with a groove surrounding the top of the drum unit 1. The guide rail 302 is fixed on the frame 201. At least one hydraulic pressure box 303 is provided on the guide rail 302. The hydraulic pressure box 303 includes a hydraulic drive component and a limiter. The limiter cooperates with the groove of the guide rail 302 to limit the continuous pipe 4. Multiple hydraulic pressure boxes 303 can be arranged along the guide rail 302. Each hydraulic pressure box 303 can include a hydraulic drive component and a limiter, or multiple hydraulic pressure boxes 303 can share a hydraulic drive component. The limiter is installed on the guide rail 302 to cover the groove of the guide rail 302, so that the continuous pipe 4 is limited in the groove. The limiter can be a limiter plate or a limiter slot plate, which can be fixedly installed on the guide rail 302, or one end can be rotatably connected to the guide rail 302, and the other end can be locked and connected to the guide rail 302.

[0070] The above-mentioned coiled tube arrangement device winds and places the coiled tube 4 through the drum body unit 1, and the direction of the coiled tube 4 can be adjusted by the multi-axis rotating pressure box 301 in the guide unit 3, so that the coiled tube 4 is wound around the guide rail 302 and enters the groove of the guide rail 302. The hydraulic pressure box 303 cooperates to restrict the coiled tube 4 in the groove, and the guide rail 302 guides the coiled tube 4 to the direction of the wellhead to be lowered, such as the wellbore to be lowered, so that the installation distance between the coiled tube arrangement device and the injection head 5 can be reduced, and the coiled tube 4 can be accurately introduced into the injection head 5 within a limited space. The coiled tube 4 drum can be suitable for pipe lowering operations in a narrow space, and can be well applied to application scenarios such as offshore platforms, reducing the requirements for the size of the installation space and improving versatility and universal applicability.

[0071] like Figure 1 and Figure 2 As shown, the guide rail 302 is installed above the drum unit 1, surrounding and covering the upper half of the drum unit 1. The guide rail 302 is arc-shaped, and preferably the guide rail 302 is coaxial with the cylindrical structure 101 of the drum unit 1. The guide rail 302 can be fixedly installed on the frame 201, or can be slidably installed on the frame 201, such as Figure 1As shown, the frame 201 has a plurality of cross bars above the drum unit 1, and the guide rails 302 can be fixedly connected to the cross bars, or can be slidably connected to each cross bar and can slide along the cross bars. The guide rails 302 can guide the coiled tubing 4 to surround the drum unit 1 and turn toward the wellhead injection direction.

[0072] In a second aspect, the coiled tubing operation system provided by the embodiment of the present invention has a structure as follows: Figure 5 As shown, it includes: a system support (not shown in the figure), an injection head 5 and a coiled tube arrangement device; in the system installation state: the injection head 5 and the coiled tube arrangement device are installed on the system support, and the cylindrical structure 101 of the coiled tube arrangement device is used to wind the coiled tube 4. The coiled tube 4 passes through the multi-axis rotating pressure box 301, and is wound toward the injection head 5 along the guide rail 302 under the cooperation of the guide rail 302 and the hydraulic pressure box 303.

[0073] In an optional embodiment, the injection head 5 includes a tripping clamping device 52 and a bell mouth 51. The bell mouth 51 is located at the upper part of the injection head 5 to guide the coiled tubing 4 into the tripping clamping device 52. The tripping clamping device 52 is used to drive the coiled tubing 4 to move upward or downward to achieve tripping of the coiled tubing 4. Figure 5 As shown in FIG. 1 , a bell mouth 51 is installed on the top of the injection head 5 to guide the coiled tubing 4 at different angles into the injection head 5 . A lifting and lowering clamping device 52 is installed inside the injection head 5 to drive the coiled tubing 4 to move downward / upward.

[0074] In an alternative embodiment, referring to Figure 6 The drum rotation drive system 102 includes a hydraulic oil tank, a drum hydraulic pump, a drum rotation drive member and a first compensator. The hydraulic oil tank is connected to the first compensator, and the drum hydraulic pump is connected to the hydraulic oil tank and the drum rotation drive member, and is used to provide power hydraulic oil to the drum rotation drive member to drive the cylindrical structure 101 to rotate. It should be noted that the drum rotation drive member is specifically a drum motor, and the specific driving method is: the drum hydraulic pump is driven by a deep-water motor, sucks oil from the hydraulic oil tank, and performs oil suction pressure compensation through the first compensator connected to the hydraulic oil tank, forming pressure oil that is sent to the drum motor after system control and the drum valve group, and further drives the cylindrical structure 101 to rotate.

[0075] In an alternative embodiment, referring to Figure 6The drum rotation drive system 102 also includes a reducer and a second compensator connected to the reducer. The reducer is connected to the drum rotation drive member to reduce speed and increase torque of the drum rotation drive member. The drum motor is connected to the reducer and drives the drum to rotate after reducing speed and increasing torque to achieve the winding and releasing of the coiled tubing 4. The deepwater motor and reducer are respectively pressure compensated to adapt to the deepwater environment through the compensator, so that the drum rotation process can adapt to the high-pressure deepwater environment. The absolute encoder 61 is installed at the shaft end of the cylindrical structure 101, and can obtain the rotation angle of the cylindrical structure 101 of the drum unit in real time to determine the number of release turns of the coiled tubing 4.

[0076] The above-mentioned system coiled tube arrangement device and injection head 5 can both be fixed on the system bracket. Since the coiled tube arrangement device can guide the coiled tube 4 in a winding direction, the distance between the two can be relatively close, such as being close to each other or separated by a relatively small distance, without being separated by a large distance. Both are fixed on the system bracket. When in use, the system bracket can be directly installed in the use scene, which greatly reduces the requirement for installation space.

[0077] In the third aspect, the method for using the coiled tubing operation system provided in the embodiment of the present application is as follows: Figure 7 ,include:

[0078] S101: using the absolute encoder 61 to mark the position of each layer and each circle of the coiled tube 4 on the drum body, so as to obtain the number of released circles of the coiled tube 4;

[0079] S102: According to the number of released turns of the coiled tubing 4, the controller adjusts the corresponding displacement of the hydraulic cylinder 202, so that each time the coiled tubing 4 is released, the distance moved by the cylindrical structure 101 is exactly equal to the outer diameter of the oil pipe;

[0080] S103: The free end of the continuous tube 4 wound on the cylindrical structure 101 passes through the multi-axis rotating press box 301 of the guide unit 3 and winds along the guide rail 302 toward the injection head 5;

[0081] S104: The free end of the coiled tubing 4 passes through the tripping and clamping device 52 of the injection head 5 and is lowered into the wellbore.

[0082] An embodiment of the present invention also provides an application of a coiled tube arrangement device in the deep sea.

[0083] When the above-mentioned operation system is operating the coiled tubing 4, the absolute value encoder 61 and the displacement sensor 62 are first set through the corresponding control program, and the number of coiled tubing 4 releases is associated with the axial displacement length of the drum unit 1, so that the distance moved by the cylindrical structure 101 is exactly equal to the outer diameter of the oil pipe for each coiled tubing 4 release. Then the system bracket equipped with the coiled tubing arrangement device and the injection head 5 is placed on the deep seabed. After the coiled tubing 4 is wound out of the cylindrical structure 101, it enters the coiled tubing 4 channel on the multi-axis rotating press box 301, and then winds along the guide rail 302 and winds along the guide rail 302 in the injection direction, and is connected to the injection head 5 through the bell mouth 51, and the operation begins under the action of the lifting and lowering clamping device 52.

[0084] The above-mentioned coiled pipe arrangement device of the embodiment of the present invention realizes the coiled pipe arrangement operation at the deep seabed, and there is no need to arrange the coiled pipe roller and the injection head 5 according to the conventional coiled pipe operation method, so as to avoid the situation that the coiled pipe 4 on the drum cannot be smoothly connected to the coiled pipe 4 injection head 5 due to insufficient platform operation area. The coiled pipe 4 is surrounded by the outer ring of the drum to overcome the flexibility of the coiled pipe 4 itself, and the installation of the coiled pipe 4 is completed within a limited operation area to further carry out the coiled pipe operation. The system saves the operation platform area required for the coiled pipe operation, reduces the dependence on large-tonnage cranes during the coiled pipe operation, enhances the ability of the coiled pipe equipment to adapt to the deep-sea high-pressure environment, promotes the development of the coiled pipe technology in multiple fields, realizes the application of the coiled pipe technology in the deep-sea high-pressure environment, and helps to develop marine oil and gas resources.

[0085] The above description includes examples of one or more embodiments. Of course, it is impossible to describe all possible combinations of components or methods for the purpose of describing the above embodiments, but it should be recognized by those skilled in the art that the various embodiments may be further combined and arranged. Therefore, the embodiments described herein are intended to cover all such changes, modifications and variations that fall within the scope of protection of the appended claims. In addition, with respect to the term "comprising" used in the specification or claims, the word is covered in a manner similar to the term "including", as explained by "including" used as a transitional word in the claims. In addition, any term "or" used in the specification of the claims is intended to mean "non-exclusive or".

Claims

1. A coiled pipe arrangement device for deep sea use, characterized in that: It includes a roller unit, a guide unit, a displacement unit and an axial displacement control system; The displacement unit comprises a frame, a hydraulic cylinder and an axial displacement control system, wherein the hydraulic cylinder is used to drive the drum unit to move in a direction parallel to its central axis; The drum unit comprises a cylindrical structure for winding the continuous pipe and a drum rotation driving system for driving the cylindrical structure to rotate, and the cylindrical structure is installed on the frame; The drum rotation drive system comprises a hydraulic oil tank, a drum hydraulic pump, a drum rotation drive member and a first compensator, wherein the hydraulic oil tank is connected to the first compensator, and the drum hydraulic pump is connected to the hydraulic oil tank and the drum rotation drive member to provide power hydraulic oil to the drum rotation drive member to drive the cylindrical structure to rotate; The guide unit is installed on the frame and surrounds the drum unit, and is used to guide the coiled tube along the cylindrical structure to the direction to be lowered; The axial displacement control system includes an absolute value encoder, a displacement sensor and a controller; The absolute encoder is installed at the end of the central axis of the reel, and is used to mark the position of each layer and each circle of the coiled tube on the drum body, so as to obtain the number of coiled tube release circles; The displacement sensor is connected to the hydraulic cylinder and is used to obtain the axial displacement of the hydraulic cylinder; The controller is connected to the absolute encoder and the displacement sensor respectively, and is used to associate the number of coiled tubing release turns with the axial displacement of the hydraulic cylinder, so that for each coiled tubing release turn, the axial displacement of the hydraulic cylinder is one coiled tubing diameter.

2. The coiled tube arrangement device according to claim 1, characterized in that: The guide unit includes a multi-axis rotating pressure box, a guide rail and a hydraulic pressure box; The multi-axis rotating pressure box is located outside the cylindrical structure, and can rotate around the axis parallel to and perpendicular to the central axis of the cylindrical structure to accommodate the continuous pipe with a deflection angle, and is used to guide the continuous pipe to go around the guide rail along the cylindrical structure; the guide rail surrounds the top of the drum unit, and is used to guide the continuous pipe to go around the cylindrical structure to the direction to be lowered; the hydraulic pressure box is used to confine the continuous pipe within the guide rail.

3. The coiled tube arrangement device according to claim 2, characterized in that: The multi-axis rotating press box includes a bracket, a first pin shaft, a swinging part and a second pin shaft. The bracket is installed on the frame through the first pin shaft and can swing around the first pin shaft to adjust the winding direction of the continuous tube; the swinging part is installed on the bracket through the second pin shaft and can swing around the second pin shaft to adjust the winding direction of the continuous tube.

4. The coiled tube arrangement device according to claim 3, characterized in that: The guide unit bracket is provided with a sliding component, and under the action of the sliding component, the guide component can move along the axial direction of the drum body unit.

5. The coiled tube arrangement device according to claim 2, characterized in that: The guide rail is a track with a groove surrounding the top of the drum unit, the guide rail is fixed on the frame, and at least one hydraulic pressure box is provided on the guide rail; The hydraulic pressure box comprises a hydraulic drive assembly and a limiting member, and the limiting member cooperates with the groove of the guide rail to limit the continuous tube.

6. The coiled tube arrangement device according to claim 1, characterized in that: The frame of the displacement unit is provided with a sliding assembly; wherein: A slide groove is arranged on the frame, and the sliding component is a slider with a slide rail; or a slide rail is arranged on the frame structure, and the sliding component is a slider with a slide groove; The roller body unit is connected to the slider. Through the cooperation of the slide groove and the slide rail, the hydraulic cylinder can push the slider to move. Driven by the slider, the roller body unit can move along the axial direction of the cylindrical structure, so that the roller body unit can slide relative to the frame.

7. The coiled tube arrangement device according to claim 1, characterized in that: The drum rotation drive system further includes a reducer and a second compensator connected to the reducer. The reducer is connected to the drum rotation drive member and is used to reduce speed and increase torque of the drum rotation drive member.

8. A coiled tubing operation system, characterized in that: include: A system support, an injection head and a coiled tube arrangement device as claimed in any one of claims 1 to 7; The injection head and the coiled tube arrangement device are installed on the system support. The cylindrical structure of the coiled tube arrangement device is used to wind the coiled tube, and the guide unit guides the coiled tube along the cylindrical structure to wind toward the injection head.

9. The coiled tubing operation system according to claim 8, characterized in that: The injection head comprises a lifting and lowering clamping device and a bell mouth; The bell mouth is located at the upper part of the injection head and is used to guide the coiled tubing into the tripping and clamping device; The lifting and lowering clamping device is used to drive the coiled tubing to move upward or downward to achieve lifting and lowering of the coiled tubing.

10. A method for using the coiled tubing system according to claims 7-9, characterized in that: include: Use an absolute encoder to mark the position of each layer and each circle of the coiled tube on the drum body to obtain the number of coiled tube release circles; The controller controls the displacement of the hydraulic cylinder according to the number of coiled tubing releases, so that for each coiled tubing release, the distance moved by the cylindrical structure is exactly equal to the outer diameter of the tubing. The free end of the continuous tube wound on the cylindrical structure passes through the multi-axis rotating press box of the guide unit and winds along the guide rail toward the injection head; The free end of the coiled tubing passes through the tripping and lowering clamping device of the injection head and is lowered into the wellbore.

11. Use of the coiled tube arrangement device according to any one of claims 1 to 7 in the deep sea.

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