A well servicing blowout preventer stack skid

Abstract

This utility model discloses a sliding device for a blowout preventer (BOP) assembly of a workover rig, belonging to the field of workover rigs. It includes a BOP assembly, a transport guide rail, a stepping guide rail, a transport trolley, a stepping hydraulic cylinder, and a tilting lug. The transport guide rail and the stepping guide rail are fixedly connected to a test base. Two transport guide rails are provided, and they are parallel to each other. The stepping guide rail is located between the two transport guide rails and is parallel to them. Both transport guide rails have elongated grooves. Rollers are provided on both sides of the transport trolley, and the rollers on both sides of the transport trolley are located in the elongated grooves of the two transport guide rails. The BOP assembly is fixed to the upper surface of the transport trolley. The tilting lug is rotatably connected to the stepping guide rail. The stepping hydraulic cylinder is arranged along the length of the stepping guide rail, with one end rotatably connected to the tilting lug and the other end rotatably connected to the transport trolley. The stepping hydraulic cylinder drives the transport trolley to move along the transport guide rail.

Description

Technical Field

[0001] This utility model belongs to the field of well workover rig technology, specifically relating to a sliding device for a well workover rig blowout preventer assembly. Background Technology

[0002] Blowout preventers (BOPs) are a key component of well control systems, used to control wellhead pressure during well workover operations. They effectively prevent blowouts and ensure safe operation. Typically, BOP assemblies are large and heavy, requiring significant labor and effort from operators to move and handle them, posing safety risks.

[0003] Typically, blowout preventer (BOP) assemblies require hydraulic cranes, winches, or other equipment for lifting during transport, followed by manual pushing to move the BOPs to the wellhead, where they are then assembled piece by piece. However, this method of operation carries significant safety risks, is time-consuming and labor-intensive, and is inconvenient for installing BOP assemblies. Utility Model Content

[0004] To address the aforementioned problems in the existing technology, this utility model provides a sliding device for the blowout preventer assembly of a workover rig. The technical problem to be solved by this utility model is achieved through the following technical solution:

[0005] In the first aspect, this utility model provides a sliding device for a workover rig blowout preventer assembly, including a blowout preventer assembly, a transfer guide rail, a stepping guide rail, a transfer trolley, a stepping hydraulic cylinder, and a tilting lug.

[0006] The transport guide rail and the stepping guide rail are used for fixed connection with the test base. There are two transport guide rails, and the two transport guide rails are parallel to each other. The stepping guide rail is located between the two transport guide rails, and the stepping guide rail is parallel to the transport guide rail.

[0007] Both transfer guide rails are equipped with long grooves, and both sides of the transfer trolley are equipped with rollers. The rollers on both sides of the transfer trolley are located in the long grooves of the two transfer guide rails respectively. The blowout preventer assembly is fixed to the upper surface of the transfer trolley.

[0008] The flip-up ear plate is rotatably connected to the stepping guide rail. The stepping hydraulic cylinder is set along the length of the stepping guide rail. One end of the stepping hydraulic cylinder is rotatably connected to the flip-up ear plate, and the other end is rotatably connected to the transfer trolley.

[0009] Stepping hydraulic cylinders are used to drive the transfer trolley to move along the transfer guide rail.

[0010] In one embodiment of this utility model, the distance between the stepping guide rail and the two transfer guide rails is equal, and the stepping hydraulic cylinder is connected to the middle position of the transfer trolley.

[0011] In one embodiment of this utility model, a rotating seat is provided on the stepping guide rail, a flipping ear plate is rotatably connected to the rotating seat, a connecting plate is provided on the transfer trolley, and one end of the stepping hydraulic cylinder is rotatably connected to the connecting plate.

[0012] In one embodiment of this utility model, a first pin, a second pin, and a third pin are also included. The flipping ear plate is rotatably connected to the rotating seat through the first pin. One end of the stepping hydraulic cylinder is rotatably connected to the flipping ear plate through the second pin, and the other end is rotatably connected to the connecting plate through the third pin.

[0013] In one embodiment of this utility model, the stepping hydraulic cylinder includes a cylinder body and a telescopic rod. The cylinder body is rotatably connected to the tilting ear plate via a second pin, and the telescopic rod is rotatably connected to the connecting plate via a third pin.

[0014] In one embodiment of this utility model, a connecting rod is further included. The two ends of the connecting rod are fixedly connected to two transfer guide rails respectively. The connecting rod is provided with a limiting hole, and the stepping guide rail passes through the limiting hole.

[0015] In one embodiment of this utility model, the stepper guide rail is provided with a plurality of positioning grooves along its length direction, and the spacing between two adjacent positioning grooves is equal.

[0016] In one embodiment of this utility model, the distance between two adjacent positioning grooves is 500mm.

[0017] In one embodiment of this utility model, the transfer trolley includes a carrying platform, the blowout preventer assembly is fixed to the carrying platform by bolts, and four rollers are provided, which are symmetrically arranged on both sides of the carrying platform.

[0018] In one embodiment of this utility model, the blowout preventer assembly is a ring structure and is installed at the center of the support platform.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] In the above-mentioned scheme of this application, the blowout preventer (BOP) assembly sliding device of the workover rig includes a BOP assembly, a transfer guide rail, a stepping guide rail, a transfer trolley, a stepping hydraulic cylinder, and a tilting lug. The transfer guide rail and the stepping guide rail are used for fixed connection with the test base. There are two transfer guide rails, which are parallel to each other. The stepping guide rail is located between the two transfer guide rails and is parallel to each other. Both transfer guide rails are provided with long grooves. Rollers are provided on both sides of the transfer trolley, and the rollers on both sides of the transfer trolley are respectively located in the long grooves of the two transfer guide rails. The BOP assembly is fixed to the upper surface of the transfer trolley. The tilting lug is rotatably connected to the stepping guide rail. The stepping hydraulic cylinder is set along the length direction of the stepping guide rail. One end of the stepping hydraulic cylinder is rotatably connected to the tilting lug, and the other end is rotatably connected to the transfer trolley. The stepping hydraulic cylinder is used to drive the transfer trolley to move along the transfer guide rail. This structure allows the stepping hydraulic cylinder to drive the transfer trolley along the length of the transfer guide rail. As the trolley moves, it moves the blowout preventer (BOP) assembly along the same length, thus moving the BOP assembly to the designated position. Furthermore, the support provided by two transfer guide rails and one stepping guide rail enhances the stability of the trolley during movement. The limiting mechanism between the long groove and the rollers ensures normal roller rotation while also improving the stability of the trolley. Additionally, when the trolley tilts, the tilting lug, stepping hydraulic cylinder, trolley, and stepping guide rail form a four-bar linkage, ensuring proper tilting of the trolley while simultaneously improving the stability of the BOP assembly. The device described in this application offers low safety risks during operation, saves time and effort during installation, and improves the ease of installing the BOP assembly.

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the sliding device of the blowout preventer assembly of the workover rig in an embodiment of this utility model;

[0023] Figure 2 This is a top view of the sliding device of the blowout preventer assembly in an embodiment of this utility model.

[0024] Reference numerals: 1-Transfer guide rail, 2-Stepping guide rail, 3-Transfer trolley, 4-Stepping hydraulic cylinder, 5-Pin shaft, 6-Flipping ear plate. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to specific embodiments, but the implementation of the present invention is not limited thereto.

[0026] Please see Figure 1 and Figure 2This utility model embodiment provides a sliding device for a workover rig blowout preventer (BOP) assembly, including a BOP assembly, a transport guide rail 1, a stepping guide rail 2, a transport trolley 3, a stepping hydraulic cylinder 4, and a tilting lug 6. The transport guide rail 1 and the stepping guide rail 2 are used for fixed connection with the test base. There are two transport guide rails 1, and the two transport guide rails 1 are parallel to each other. The stepping guide rail 2 is located between the two transport guide rails 1, and the stepping guide rail 2 is parallel to the transport guide rail 1. Both transport guide rails 1 are equipped with... The trolley 3 has long grooves, and rollers are provided on both sides of the trolley 3. The rollers on both sides of the trolley 3 are located in the long grooves of the two transport guide rails 1 respectively. The blowout preventer assembly is fixed to the upper surface of the trolley 3. The flip-up ear plate 6 is rotatably connected to the stepping guide rail 2. The stepping hydraulic cylinder 4 is set along the length of the stepping guide rail 2. One end of the stepping hydraulic cylinder 4 is rotatably connected to the flip-up ear plate 6, and the other end is rotatably connected to the trolley 3. The stepping hydraulic cylinder 4 is used to drive the trolley 3 to move along the transport guide rail 1.

[0027] In some embodiments of this application, both the transport guide rail 1 and the stepping guide rail 2 are fixed to the test base by bolts.

[0028] In some embodiments of this application, the length of the stepper rail 2 is less than the length of the transfer rail 1.

[0029] In the above-mentioned scheme of this application, the blowout preventer assembly sliding device of the workover rig includes a blowout preventer assembly, a transfer guide rail 1, a stepping guide rail 2, a transfer trolley 3, a stepping hydraulic cylinder 4, and a tilting lug 6; the transfer guide rail 1 and the stepping guide rail 2 are used for fixed connection with the test base, there are two transfer guide rails 1, and the two transfer guide rails 1 are parallel to each other, the stepping guide rail 2 is located between the two transfer guide rails 1, and the stepping guide rail 2 is parallel to the transfer guide rail 1; both transfer guide rails 1 are provided with long grooves. The transfer trolley 3 has rollers on both sides, and these rollers are located in the long grooves of the two transfer guide rails 1. The blowout preventer assembly is fixed to the upper surface of the transfer trolley 3. The tilting ear plate 6 is rotatably connected to the stepping guide rail 2. The stepping hydraulic cylinder 4 is arranged along the length of the stepping guide rail 2, with one end rotatably connected to the tilting ear plate 6 and the other end rotatably connected to the transfer trolley 3. The stepping hydraulic cylinder 4 is used to drive the transfer trolley 3 to move along the transfer guide rail 1. With this structure, the stepping hydraulic cylinder 4 can drive the transfer trolley 3 to move along the length of the transfer guide rail 1. When the trolley moves, it can drive the blowout preventer assembly to move along the length of the transfer guide rail 1, thereby moving the blowout preventer assembly to the designated position. Furthermore, the transfer trolley 3 is supported by two transfer guide rails 1 and one stepping guide rail 2, which improves the stability of the transfer trolley 3 during movement. The limiting mechanism between the long groove and the rollers ensures normal roller rotation while also enhancing the stability of the transfer trolley 3. Additionally, when the transfer trolley 3 tilts, the tilting ear plate 6, the stepping hydraulic cylinder 4, the transfer trolley 3, and the stepping guide rail 2 form a four-bar linkage, ensuring normal tilting of the transfer trolley 3 while improving the stability of the blowout preventer assembly. The device described in this application has low operational risk, is more time- and labor-saving to install, and improves the ease of installing the blowout preventer assembly.

[0030] In some embodiments of this application, the spacing between the stepping guide rail 2 and the two transfer guide rails is equal, and the stepping hydraulic cylinder 4 is connected to the middle position of the transfer trolley 3. This structure enables a uniform and symmetrical distribution of thrust and load, avoiding uneven loading and jamming. This structure improves the smoothness and reliability of the stepping motion, reduces frictional losses and failure risks during operation, enhances overall rigidity and stability, and makes forward and backward movements precise and controllable.

[0031] In some embodiments of this application, the stepping guide rail 2 is provided with a rotating seat, the flipping ear plate 6 is rotatably connected to the rotating seat, the transfer trolley 3 is provided with a connecting plate, and one end of the stepping hydraulic cylinder 4 is rotatably connected to the connecting plate. This structure effectively decomposes the radial force and bending moment during the hydraulic cylinder's operation through multiple rotating pairs, avoiding rigid interference and stiffness between components, ensuring smooth and reliable flipping and stepping movements, and extending the service life of the hydraulic cylinder and connecting structure.

[0032] In some embodiments of this application, the sliding device of the blowout preventer assembly of the workover rig includes three pins 5, namely a first pin, a second pin, and a third pin. A tilting lug 6 is rotatably connected to a rotating seat via the first pin. One end of the stepping hydraulic cylinder 4 is rotatably connected to the tilting lug 6 via the second pin, and the other end is rotatably connected to a connecting plate via the third pin. This structure, through the split-shaft connection of the three pins, forms a multi-degree-of-freedom rotating pair between the tilting lug 6, the stepping hydraulic cylinder 4, and the connecting plate, effectively decomposing complex torques and eccentric loads in various directions and eliminating motion interference. This structure ensures that the hydraulic cylinder only bears axial force, improving the smoothness and accuracy of the stepping and tilting actions, while reducing wear on the connecting parts.

[0033] In some embodiments of this application, the stepping hydraulic cylinder 4 includes a cylinder body and a telescopic rod. The cylinder body is rotatably connected to the tilting lug 6 via a second pin, and the telescopic rod is rotatably connected to the connecting plate via a third pin. This allows the hydraulic cylinder body and the telescopic rod to rotate freely around their respective axes, effectively adapting to complex angular changes during the stepping and tilting processes. This structure eliminates the radial additional load on the hydraulic cylinder, ensuring it only bears axial thrust, improving operational accuracy and stability, while reducing the risk of seal wear and leakage.

[0034] In some embodiments of this application, the sliding device for the blowout preventer assembly of the workover rig further includes a connecting rod. Both ends of the connecting rod are fixedly connected to two transfer guide rails 1, and the connecting rod has limiting holes through which the stepping guide rail 2 passes. Thus, the limiting holes effectively constrain the stepping guide rail 2, ensuring that it can only translate along a preset axis, preventing lateral displacement or torsion during hydraulic cylinder operation. This structure enhances the overall rigidity between the two guide rails through the connecting rod, making the stepping guidance precise and reliable, and ensuring stable load bearing, while also simplifying the installation and commissioning process.

[0035] In some embodiments of this application, the stepping guide 2 is provided with multiple positioning slots along its length, with equal spacing between adjacent positioning slots. This evenly spaced arrangement of the positioning slots ensures that the transfer trolley 3 can move precisely a fixed distance after each stroke of the stepping hydraulic cylinder 4. This structure, by replacing manual measurement with mechanical positioning, eliminates accumulated errors, ensures the determinism and repeatability of the stepping process, and makes operation more efficient and reliable.

[0036] In some embodiments of this application, the spacing between two adjacent positioning slots is less than 500 mm. This structure enables the transfer trolley 3 to move more precisely.

[0037] In some embodiments of this application, the transfer trolley 3 includes a support platform, the blowout preventer assembly is fixed to the support platform by bolts, and four rollers are symmetrically arranged on both sides of the support platform. Thus, the support platform is rigidly connected to the blowout preventer assembly by bolts, and the symmetrical arrangement of the four rollers effectively distributes the load evenly. This structure ensures a stable center of gravity during equipment transfer, prevents overturning or jamming caused by uneven loading, allows the trolley to roll smoothly on the guide rails, and improves the load-bearing capacity and operational reliability of the transfer trolley 3.

[0038] In some embodiments of this application, the blowout preventer assembly is a ring structure, installed at the center of the support platform. This structure, with the blowout preventer assembly ring-shaped and installed at the center of the support platform, ensures that the equipment's center of gravity coincides with the trolley's geometric center. This guarantees that the load is evenly distributed across the four rollers during transport, effectively avoiding additional torque caused by center of gravity shift, enhancing operational stability and safety, and preventing accidental overturning.

[0039] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A sliding device for a blowout preventer assembly of a workover rig, characterized in that, Includes blowout preventer assembly, transfer guide rail, stepping guide rail, transfer trolley, stepping hydraulic cylinder, and tilting lug; The transport guide rail and the stepping guide rail are used to be fixedly connected to the test base. There are two transport guide rails, and the two transport guide rails are parallel to each other. The stepping guide rail is located between the two transport guide rails, and the stepping guide rail is parallel to the transport guide rails. Both of the two transport guide rails are provided with long grooves, and both sides of the transport trolley are provided with rollers. The rollers on both sides of the transport trolley are respectively located in the long grooves of the two transport guide rails. The blowout preventer assembly is fixed to the upper surface of the transport trolley. The flip-up ear plate is rotatably connected to the stepping guide rail. The stepping hydraulic cylinder is arranged along the length direction of the stepping guide rail. One end of the stepping hydraulic cylinder is rotatably connected to the flip-up ear plate, and the other end is rotatably connected to the transfer trolley. The stepping hydraulic cylinder is used to drive the transfer trolley to move along the transfer guide rail.

2. The sliding device for the blowout preventer assembly of the workover rig according to claim 1, characterized in that, The distance between the stepping guide rail and the two transport guide rails is equal, and the stepping hydraulic cylinder is connected to the middle position of the transport trolley.

3. The sliding device for the blowout preventer assembly of the workover rig according to claim 2, characterized in that, The stepping guide rail is provided with a rotating seat, the flipping ear plate is rotatably connected to the rotating seat, the transfer trolley is provided with a connecting plate, and one end of the stepping hydraulic cylinder is rotatably connected to the connecting plate.

4. The sliding device for the blowout preventer assembly of the workover rig according to claim 3, characterized in that, It also includes a first pin, a second pin, and a third pin. The flipping ear plate is rotatably connected to the rotating seat via the first pin. One end of the stepping hydraulic cylinder is rotatably connected to the flipping ear plate via the second pin, and the other end is rotatably connected to the connecting plate via the third pin.

5. The sliding device for the blowout preventer assembly of the workover rig according to claim 4, characterized in that, The stepping hydraulic cylinder includes a cylinder body and a telescopic rod. The cylinder body is rotatably connected to the tilting ear plate via the second pin, and the telescopic rod is rotatably connected to the connecting plate via the third pin.

6. The sliding device for the blowout preventer assembly of the workover rig according to claim 2, characterized in that, It also includes a connecting rod, the two ends of which are fixedly connected to the two transport guide rails respectively. The connecting rod is provided with a limiting hole, and the stepping guide rail passes through the limiting hole.

7. The sliding device for the blowout preventer assembly of the workover rig according to claim 1, characterized in that, The stepper rail has multiple positioning grooves along its length, and the spacing between two adjacent positioning grooves is equal.

8. The sliding device for the blowout preventer assembly of the workover rig according to claim 7, characterized in that, The distance between two adjacent positioning slots is 500mm.

9. The sliding device for the blowout preventer assembly of the workover rig according to claim 1, characterized in that, The transfer trolley includes a carrying platform, the blowout preventer assembly is fixed to the carrying platform by bolts, and four rollers are provided, which are symmetrically arranged on both sides of the carrying platform.

10. The sliding device for the blowout preventer assembly of the workover rig according to claim 9, characterized in that, The blowout preventer assembly has a ring structure and is installed at the center of the support platform.

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