A hydraulic crossing system based on ROV panel installation

Abstract

The present invention provides a hydraulic crossing system based on ROV panel installation, belonging to the technical field of oil tree technology, comprising a tree frame, an oil tree body mounted inside the tree frame, an ROV panel mounted on one side of the tree frame, and a hydraulic crossing mechanism arranged horizontally between the ROV panel and the oil tree body; the hydraulic crossing mechanism comprises a mounting seat fixed to the side of the oil tree body, a positioning cylinder fixed to the ROV panel, and a transmission rod rotatably connected to the mounting seat and the positioning cylinder at both ends; a slider is slidably mounted inside the mounting seat, and a plurality of crossing tubes are fixedly penetrated on the slider, one end of each crossing tube passes through the mounting seat and is plugged into the oil tree body; one end of the transmission rod extends into the interior of the mounting seat and is threadedly connected to the slider. Compared with traditional hydraulic crossing system installation methods, the present invention can facilitate the disconnection or docking between the underwater execution crossing system of an ROV underwater robot and the oil tree body, significantly optimizes the convenience of ROV underwater operation, and has higher practical value.

Description

Technical Field

[0001] The invention belongs to the technical field of Christmas trees, and in particular relates to a hydraulic crossing system based on ROV panel installation. Background Art

[0002] The subsea Christmas tree is the core equipment of a subsea production system. Its primary functions include controlling the flow of produced oil and gas, monitoring well parameters such as production pressure, annular pressure, and temperature, injecting chemicals into the wellbore to improve fluid flow, providing access to the wellbore during testing and workovers, supporting the tubing string, and sealing the annular space between the downhole tubing and production casing. Together with the subsea wellhead system, it forms a barrier between the downhole reservoir and the environment.

[0003] The offshore oil production system implemented based on the Christmas tree involves the injection of chemicals and the injection of hydraulic oil for the downhole safety valve. The hydraulic crossing system is a piping system used in the Christmas tree, through which chemicals, hydraulic oil and other liquids can be injected into the Christmas tree. Due to the complex and changeable marine environment, the Christmas tree and its related components require regular maintenance, upkeep, and inspection. During this process, the ROV underwater robot often needs to disconnect and connect the hydraulic connectors of the hydraulic crossing system multiple times to provide a landing and recovery channel for the tubing hanger. In the traditional installation method, the hydraulic crossing system and the Christmas tree body adopt an overall plug-in assembly design of the horizontal crossing device. The docking accuracy of the hydraulic male plug of the horizontal crossing system and the internal tubing hanger female socket is low, and the hydraulic crossing system is integrated into the Christmas tree installation frame. When operating underwater, the ROV needs to bypass obstacles such as the frame, pipelines, and panels, making the plug-in and pull-out operations more inconvenient. Summary of the Invention

[0004] In view of this, the present invention aims to propose a hydraulic crossing system based on ROV panel installation, which can improve the convenience of underwater operation of ROV underwater robot.

[0005] To achieve the above-mentioned objectives, the technical solution of the present invention is implemented as follows: a hydraulic crossing system based on ROV panel installation includes a tree frame, an oil production tree body is installed inside the tree frame, an ROV panel is installed on one side of the tree frame, and a hydraulic crossing mechanism is horizontally arranged between the ROV panel and the oil production tree body; the hydraulic crossing mechanism includes a mounting seat fixed to the side of the oil production tree body, a positioning cylinder fixed to the ROV panel, and a transmission rod with both ends rotatably connected to the mounting seat and the positioning cylinder, a slider is slidably assembled in the mounting seat, and a plurality of crossing tubes are fixedly penetrated on the slider, one end of each of the crossing tubes passes through the mounting seat and is plugged into the oil production tree body, and one end of the transmission rod extends into the interior of the mounting seat and is threadedly connected to the slider.

[0006] Furthermore, a circular hole is provided at one end of the mounting seat away from the Christmas tree body, and the sliding block is a cylindrical structure and is slidably disposed in the circular hole.

[0007] Furthermore, a square head structure is provided at one end of the transmission rod located in the positioning cylinder.

[0008] Furthermore, the end of the mounting seat is sleeved with a blocking cover, and a plurality of groups of spring pieces are distributed in a ring array at one end of the blocking cover close to the mounting seat, and the end of each spring piece is provided with a downwardly protruding tightening portion, and the mounting seat is circumferentially provided with a tightening ring groove that matches the tightening portion; a clamping ring is slidably provided on the outer sleeve of the blocking cover, and the clamping ring can force each of the tightening portions to be pressed down into the tightening ring groove;

[0009] A locking screw is provided between the clamping ring and the blocking cover, and the locking screw is weakened.

[0010] Furthermore, a first limiting portion is provided on the inner side of the clamping ring, and a second limiting portion is provided on the end of the blocking cover away from the mounting seat, with a sliding distance between the first limiting portion and the second limiting portion;

[0011] The middle part of the transmission rod is provided with a mounting ring groove, a support piece is rotatably sleeved on the mounting ring groove, and a fixing rod is connected between the support piece and the end of the clamping ring.

[0012] Furthermore, the transmission rod is rotatably matched with the positioning cylinder, and the transmission rod can slide axially relative to the positioning cylinder, and an annular groove is provided at the end of the transmission rod extending into one end of the positioning cylinder.

[0013] Furthermore, the crossing pipe is plugged into the Christmas tree body via a hydraulic joint.

[0014] Furthermore, a sealing ring is provided between the blocking cover and the outside of the mounting seat.

[0015] Furthermore, the second limiting portion is a circular ring component, which is threadedly connected to the outer end of the blocking cover.

[0016] Compared with the prior art, the hydraulic crossing system based on ROV panel installation described in the present invention has the following advantages: using the hydraulic crossing system based on ROV panel installation provided by the present invention, the right end of the transmission rod is integrated on the ROV panel, and cooperates with the threaded transmission method between it and the slider. When the ROV underwater robot is operated, the tool is inserted into the positioning cylinder, and then the transmission rod is twisted to drive the slider to slide left and right in the mounting seat. The crossing pipe drives the hydraulic connector with the synchronous left and right movement of the slider, thereby achieving disconnection and docking with the oil tree body. At the same time, when an emergency failure occurs in the threaded transmission, the hydraulic connector can be disengaged through a secondary emergency unlocking. Compared with the traditional hydraulic crossing system installation method, the hydraulic crossing system based on ROV panel installation described in the present invention can control the linear plugging and unplugging of the hydraulic connector by operating the ROV panel, so as to achieve convenient, fast and precise docking of the hydraulic connector. The secondary emergency unlocking avoids the risk of the hydraulic connector being unable to be retracted when the threaded transmission unlocking fails, making it difficult to recover the oil tree, thereby improving the stability and reliability of the system. It has higher practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 This is a schematic structural diagram of the hydraulic traversal system based on ROV panel installation according to the present invention;

[0019] Figure 2 A partial cross-sectional diagram showing the installation structure of the hydraulic crossing system in the Christmas tree;

[0020] Figure 3 A partial schematic diagram showing the connection between the mounting base, plugging cover, and clamping ring in the hydraulic pass-through system (the locking screw is in the locked state);

[0021] Figure 4 A partial schematic diagram showing the connection between the mounting base, plugging cover, and clamping ring in the hydraulic through-hole system (the locking screw is in the broken state);

[0022] Figure 5 Schematic diagram of the structure of the plug cover.

[0023] Description of reference numerals:

[0024] 1. Christmas tree body; 2. Tree frame; 3. ROV panel;

[0025] 4. Hydraulic crossing mechanism; 4a. Mounting seat; 4a1. Round hole; 4a2. Clamping ring groove; 4b. Positioning cylinder; 4c. Transmission rod; 4c1. Square head structure; 4c2. Mounting ring groove; 4c3. Annular clamping groove; 4d. Slider; 4e. Crossing tube; 4f. Plug cover; 4f1. Spring piece; 4f2. Clamping part; 4f3. Second limiting part; 4g. Pressing ring; 4g1. First limiting part; 4h. Locking screw; 4i. Support plate; 4j. Fixing rod; 4k. Hydraulic joint; 4m. Sealing ring. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0027] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0028] like Figure 1 As shown, the present invention is a hydraulic crossing system based on ROV panel installation, including a tree frame 2, in which a Christmas tree body 1 is installed. An ROV panel 3 is installed on one side of the tree frame 2. The ROV panel 3 is an integrated panel that facilitates the operation of the ROV underwater robot.

[0029] Combined with attachment Figure 2 It can be seen that a hydraulic crossing mechanism 4 is arranged horizontally between the ROV panel 3 and the Christmas tree body 1. The hydraulic crossing mechanism 4 is arranged horizontally. The hydraulic crossing mechanism 4 includes a mounting seat 4a, a positioning cylinder 4b, and a transmission rod 4c connected between the mounting seat 4a and the positioning cylinder 4b. Among them, the mounting seat 4a is fixed to the side of the Christmas tree body 1, and the positioning cylinder 4b is fixed to the ROV panel 3. Figure 3 As can be seen, a slider 4d is slidably mounted within the mounting seat 4a. Several through-tubes 4e are fixedly mounted on these sliders 4d. The left end of each through-tube 4e extends through the mounting seat 4a and is plugged into the Christmas tree body 1. These through-tubes 4e, also known as the piping system mentioned in the background art, allow chemicals, hydraulic oil, and other substances to be injected into the Christmas tree body 1. In this description, unless otherwise specified, "several" means two or more.

[0030] For example Figure 2As shown, the left end of the transmission rod 4c extends into the interior of the mounting seat 4a and is threadedly sleeved with the slider 4d, and the right end of the transmission rod 4c extends into the positioning cylinder 4b and is rotationally engaged with the positioning cylinder 4b. In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "horizontal", "inner", "outer", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0031] Based on the above structure settings, please refer to Figure 2 By rotating the transmission rod 4c, the slider 4d slides left and right within the mounting seat 4a. The crossover tube 4e moves synchronously with the slider 4d, disconnecting or docking the crossover tube with the Christmas tree body 1. The right end of the transmission rod 4c is located within the positioning tube 4b on the ROV panel 3. Therefore, when the ROV carries tools underwater, inserts them into the positioning tube 4b, and then rotates the transmission rod 4c to disconnect or dock the hydraulic crossover system. To facilitate underwater operation of the ROV carrying tools, the end of the transmission rod 4c located within the positioning tube 4b is configured as a square head 4c1.

[0032] For example Figure 3 As shown, in this embodiment, a circular hole 4a1 is provided at one end of the mounting seat 4a away from the Christmas tree body 1, and the slider 4d is a cylindrical structure and is slidably disposed in the circular hole 4a1.

[0033] For further information, see Figure 3 , the end of the mounting seat 4a is covered with a plug 4f, combined with the attached Figure 5 As can be seen, a circular array of several spring clips 4f1 is arranged on one end of the plug cover 4f, near the mounting base 4a. These clips 4f1 are capable of deforming when subjected to external forces and returning to their original shape when the external force ceases. Each clip 4f1 is also provided with a downwardly protruding clamping portion 4f2 at its end, and the mounting base 4a is circumferentially provided with a clamping groove 4a2 that mates with the clamping portion 4f2. A compression ring 4g is also slidably mounted on the outer sleeve of the plug cover 4f. A locking screw 4h is located between the compression ring 4g and the plug cover 4f. This locking screw 4h is weakened, meaning its strength is reduced so that it will break when subjected to a certain external force. It is important to note that the locking screw 4h is replaceable. If it breaks, it can be replaced with a new, weakened locking screw 4h to reconnect the compression ring 4g to the plug cover 4f.

[0034] Combined with Figure 3It can be seen that when the clamping ring 4g is locked on the plug cover 4f by the locking screw 4h, the clamping ring 4g forces each clamping portion 4f2 to press down into the clamping ring groove 4a2. The clamping ring 4g and the plug cover 4f are fixedly mounted on the end of the mounting seat 4a as a whole, and can seal the slider 4d in the circular hole 4a1. In addition, this design has another function: please refer to the attached Figure 4 As shown, when an emergency failure occurs in the threaded transmission, the hydraulic joint can be disengaged through secondary emergency unlocking. Specifically, when the transmission rod 4c is stuck and cannot be rotated, the weakened locking screw 4h can be torn off by pulling the clamping ring 4g with force, and the clamping ring 4g slides outward relative to the plug cover 4f. The clamping portion 4f2 moves upward away from the clamping ring groove 4a2 under the action of the spring piece 4f1. At this time, the clamping ring 4g and the plug cover 4f are in a movable separation state from the mounting seat 4a. Then, by further dragging it to the right, the slider 4d can be driven to move to the right, thereby disconnecting the crossing pipe 4e from the oil production tree body 1. The secondary emergency unlocking effectively avoids the risk of the hydraulic joint being unable to be retracted and the oil production tree being difficult to recover when the threaded transmission unlocking fails, thereby improving the stability and reliability of the system and having higher practical value.

[0035] Further, such as Figure 3 and 4 As shown, a first limiting portion 4g1 is provided inside the clamping ring 4g, and a second limiting portion 4f3 is provided at the end of the blocking cover 4f away from the mounting seat 4a. There is a sliding distance between the first limiting portion 4g1 and the second limiting portion 4f3. Figure 2As can be seen, the middle portion of the transmission rod 4c is provided with a mounting ring groove 4c2, on which a support plate 4i is rotatably mounted. A fixing rod 4j is provided between the support plate 4i and the end of the clamping ring 4g. With this design, during conventional unlocking, the slider 4d can be moved rightward by rotating the transmission rod 4c. During emergency unlocking, the slider 4d can also be moved rightward by linearly pulling the transmission rod 4c. The specific process is as follows: first, the transmission rod 4c is pulled, and then the pulling force is transmitted sequentially from the support plate 4i to the fixing rod 4j to the clamping ring 4g. After the locking screw 4h is torn off, the clamping ring 4g moves rightward until the first limit portion 4g1 abuts the second limit portion 4f3. At this time, the clamping portion 4f2 moves upward away from the clamping ring groove 4a2, unlocking the cover 4f. Further pulling of the transmission rod 4c can then drive the slider 4d to the right. In this embodiment, the transmission rod 4c and the cover 4f are only rotationally engaged, with no axial sliding freedom. Therefore, the transmission rod 4c can only drive the slider 4d to the right after the cover 4f is unlocked. In the description of the present invention, it should be understood that the terms "first," "second," etc. are used solely for descriptive purposes and should not be construed to indicate or imply relative importance or implicitly specify the number of technical features being referred to. Therefore, features designated as "first," "second," etc. may explicitly or implicitly include one or more of such features.

[0036] The transmission rod 4c is rotatably matched with the positioning tube 4b, and the transmission rod 4c can slide axially relative to the positioning tube 4b. The end of the transmission rod 4c extending into one end of the positioning tube 4b is provided with an annular groove 4c3. This design can facilitate the ROV underwater robot to carry tools and linearly pull the transmission rod 4c.

[0037] For example Figure 3 As shown, the second limiting portion 4f3 is a circular ring component, which is assembled to the outer end of the plug cover 4f in a threaded connection manner. Because the first limiting portion 4g1 is provided on the inner side of the clamping ring 4g, such an assembly structure can ensure the feasibility of assembly between the clamping ring 4g and the plug cover 4f.

[0038] In this embodiment, please refer to Figure 2 The through pipe 4e is connected to the Christmas tree body 1 through the hydraulic joint 4k. Figure 3 A sealing ring 4m is provided between the blocking cover 4f and the outside of the mounting seat 4a.

[0039] During actual operation, when the Christmas tree and its associated components require regular maintenance, upkeep, or repair, the ROV (Underwater Vehicle) carries its tools underwater and inserts them into the positioning cylinder 4b. Then, rotating the drive rod 4c drives the slider 4d to slide left and right within the mounting seat 4a. The cross-tube 4e moves synchronously with the slider 4d, disconnecting or docking the cross-tube 4e with the Christmas tree body 1. If the drive rod 4c becomes stuck and cannot rotate, the compression ring 4g can be pulled forcefully to break the weakened locking screw 4h. The compression ring 4g slides outward relative to the plug 4f, and the clamping portion 4f2, under the action of the spring 4f1, moves upward out of the clamping ring groove 4a2. At this point, the compression ring 4g and the plug 4f are separated from the mounting seat 4a. Further rightward dragging can then drive the slider 4d to the right, disconnecting the cross-tube 4e from the Christmas tree body 1.

[0040] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A hydraulic traversing system based on ROV panel installation, comprising a tree frame (2), a Christmas tree body (1) is installed inside the tree frame (2), and an ROV panel (3) is installed on one side of the tree frame (2), characterized in that: A hydraulic crossing mechanism (4) is horizontally arranged between the ROV panel (3) and the Christmas tree body (1); the hydraulic crossing mechanism (4) comprises a mounting seat (4a) fixed on the side of the Christmas tree body (1), a positioning cylinder (4b) fixed on the ROV panel (3), and a transmission rod (4c) with both ends rotatably connected to the mounting seat (4a) and the positioning cylinder (4b); a slider (4d) is slidably mounted in the mounting seat (4a), and a plurality of crossing tubes (4e) are fixedly penetrated on the slider (4d), one end of each of the crossing tubes (4e) passes through the mounting seat (4a) and is plugged into the Christmas tree body (1); one end of the transmission rod (4c) extends into the interior of the mounting seat (4a) and is threadedly connected to the slider (4d); The end of the mounting seat (4a) is provided with a plugging cover (4f), and a plurality of groups of spring pieces (4f1) are distributed in a circular array at one end of the plugging cover (4f) close to the mounting seat (4a). At the same time, the end of each spring piece (4f1) is provided with a downwardly protruding clamping portion (4f2), and the mounting seat (4a) is circumferentially provided with a clamping ring groove (4a2) matching the clamping portion (4f2); the outer sleeve of the plugging cover (4f) is provided with a clamping ring (4g) that is slidable, and the clamping ring (4g) can force each clamping portion (4f2) to be pressed down in the clamping ring groove (4a2); A locking screw (4h) is provided between the clamping ring (4g) and the blocking cover (4f), and the locking screw (4h) is weakened; A first limiting portion (4g1) is provided on the inner side of the clamping ring (4g), and a second limiting portion (4f3) is provided on the end of the blocking cover (4f) away from the mounting seat (4a), with a sliding distance between the first limiting portion (4g1) and the second limiting portion (4f3); A mounting ring groove (4c2) is provided in the middle of the transmission rod (4c), a support plate (4i) is rotatably mounted on the mounting ring groove (4c2), and a fixing rod (4j) is connected between the support plate (4i) and the end of the pressing ring (4g); The transmission rod (4c) is rotationally matched with the positioning cylinder (4b), and the transmission rod (4c) can slide axially relative to the positioning cylinder (4b). The end of the transmission rod (4c) extending into one end of the positioning cylinder (4b) is provided with an annular groove (4c3).

2. The ROV panel-mounted hydraulic traversing system according to claim 1, characterized in that: A circular hole (4a1) is provided at one end of the mounting seat (4a) away from the Christmas tree body (1); the sliding block (4d) is a cylindrical structure and is slidably arranged in the circular hole (4a1).

3. The ROV panel-mounted hydraulic traversing system according to claim 1, characterized in that: One end of the transmission rod (4c) located in the positioning cylinder (4b) is provided with a square head structure (4c1).

4. The ROV panel-mounted hydraulic traversing system according to claim 1, characterized in that: The crossing pipe (4e) is plugged into the Christmas tree body (1) via a hydraulic joint (4k).

5. The ROV panel-mounted hydraulic traversing system according to claim 1, characterized in that: A sealing ring (4m) is provided between the blocking cover (4f) and the outside of the mounting seat (4a).

6. The ROV panel-mounted hydraulic traversing system according to claim 1, characterized in that: The second limiting portion (4f3) is a circular ring component, which is threadedly connected to the outer end of the blocking cover (4f).

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