Blowout preventer ram top seal grommet removal device

Abstract

The present application relates to oilfield equipment maintenance technical tool field, specifically to a blowout preventer ram top sealing rubber core dismounting device, including jacking power device, jacking power device top rotatably provided with horizontally telescopic rubber core dismounting cutter seat, rubber core dismounting cutter seat is provided with dismounting cutter assembly;The upper cutter head of dismounting cutter assembly adopts hinged connection mode, so that the upper cutter head is more flexible, and can adapt to the change of angle, avoid stress concentration;The cutter head inclined section of lower cutter head can be quickly inserted into the gap between rubber core and ram, the jacking power device applies continuous upward thrust to separate the rubber core from the ram groove, and the cutter body inclined section can decompose the vertical thrust of the jacking power device into horizontal thrust, so that one side of the rubber core is raised and the rear of the upper cutter head is pushed upward, at this time, the front end of the upper cutter head is downwardly deflected to secondly occlude the rubber core, form occlusion force, can effectively hold the rubber core, prevent the rubber core from slipping.

Description

Technical Field

[0001] This invention relates to the field of oilfield equipment maintenance tools, and in particular to a device for disassembling the top sealing core of a blowout preventer gate. Background Technology

[0002] In industrial sectors such as oil and gas exploration and extraction, blowout preventers (BOPs) are critical equipment for ensuring drilling safety. The top sealing core of the BOP gate, as a vital sealing component, is subject to aging and damage during long-term use due to harsh conditions such as high pressure, wear, and corrosion. It typically needs replacement approximately every six months to ensure the overall sealing performance of the BOP. However, because the sealing core is exposed to high pressure and corrosive environments, it is prone to rust and adhesion to surrounding components, making it difficult to remove. Traditional disassembly methods often rely on workers using tools such as pipe wrenches, spanners, and pry bars, which can easily slip or fly off due to mismatch between the tools and the core's disassembly surface, making disassembly difficult and potentially causing injury. Furthermore, manual operation makes it difficult to precisely control the disassembly force and direction, easily leading to stress concentration and partial tearing of the core, resulting in incomplete removal and affecting overall disassembly efficiency. Uneven force application during manual operation can also cause mechanical damage to the gate, affecting the equipment's lifespan and overall sealing performance.

[0003] Existing Chinese patent CN206614460U discloses a device for disassembling the rubber core of a blowout preventer gate assembly. This device uses a power unit mounted on a support, connected to a wedging device and a pulling device, with the wedging device positioned on either side of the pulling device. After the gate assembly is placed on the disassembly device, the wedging device, driven by the power unit, first weds into the joint of the rubber core. Then, the pulling device, driven by the power unit, pulls the gate to separate the gate and the rubber core, thus achieving the purpose of disassembling the rubber core from the gate assembly. However, because the rubber core has a rounded edge, the wedging device in the cited document can only be inserted into the gap between the rubber core and the gate. During subsequent disassembly, the gripping force on the rubber core is unstable, making it prone to disengagement. Therefore, manual assistance is required to fix the rubber core in the gripper, making it impossible to fully automate the disassembly of the top sealing rubber core of the blowout preventer gate. Therefore, it is necessary to provide a more efficient and uniformly force-applying device for disassembling the top sealing rubber core of a blowout preventer gate. Summary of the Invention

[0004] To overcome the aforementioned problems of low accuracy, poor versatility, and low convenience, this invention provides a device for disassembling the top sealing core of a blowout preventer gate.

[0005] The technical embodiment of the present invention is a device for removing the sealing core of the blowout preventer gate, including a lifting device, a horizontally retractable core removal knife holder rotatably provided on the top of the lifting device, and a removal knife assembly provided inside the core removal knife holder;

[0006] The disassembly knife assembly includes a mounting frame, a clamping power device is provided on the top of the mounting frame, the power telescopic end of the clamping power device passes vertically through the mounting frame and is hinged to an upper cutter head, a movable groove is provided on the upper cutter head, a connecting rod is hinged in the movable groove, the other end of the connecting rod is hinged to the mounting frame, and a pin is detachably connected to the upper cutter head at the front end of the movable groove, with the pin tip facing down.

[0007] A lower cutter head that works in conjunction with the upper cutter head is detachably connected to the lower side wall of the mounting bracket. The top of the lower cutter head is provided with a cutter head inclined section, a cutter head horizontal section, and a cutter body inclined section in sequence in the horizontal direction.

[0008] The glue core removal tool holder includes a tool holder body. The front end of the tool holder body is provided with a through slot. The rear end of the tool holder body is detachably connected to a connecting plate. A horizontal power device is fixedly installed on the connecting plate. The power extension end of the horizontal power device slides through the connecting plate and is connected to a guide block. The guide block slides through the slot of the tool holder body.

[0009] Preferably, the front end of the guide block is provided with a T-shaped slot one that engages with the T-shaped card platform, and the rear end of the guide block is provided with a T-shaped slot two that engages with the power telescopic end of the horizontal power device.

[0010] Preferably, the mounting bracket has an L-shaped structure, with a slot on the lower side wall of the vertical section of the mounting bracket, and at least one connecting hole on the mounting bracket at the upper end of the slot. The rear end of the lower cutter head is provided with a hanging ear, and a connecting hole corresponding to the connecting hole is provided on the hanging ear. The hanging ear and the mounting bracket are fixedly connected by screws.

[0011] Preferably, the lifting device includes a lifting power device, a mounting base, and a mounting plate; the top of the lifting power device is fixedly mounted with a mounting base, the top of the mounting base is fixedly connected with a mounting plate, and the power extension end of the lifting power device is fixedly mounted with a lifting shaft, which slides through the mounting base and the mounting plate and is rotatably connected to the bottom of the tool holder body.

[0012] Preferably, an operating port is provided on the side wall of the mounting base.

[0013] Preferably, the horizontal power unit is a hydraulic cylinder.

[0014] Preferably, the lifting power device is a hydraulic cylinder.

[0015] Preferably, the clamping power device is a cylinder.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] The inclined section of the lower cutter head can be quickly inserted into the gap between the rubber core and the gate plate. The hydraulic cylinder of the lifting power unit applies a continuous upward thrust to disengage the rubber core from the gate plate groove. At the same time, the inclined section of the cutter body can decompose the vertical thrust of the hydraulic cylinder into a horizontal thrust, causing one side of the rubber core to tilt up and push the rear of the upper cutter head to deflect upward. Meanwhile, the cylinder of the pressing power unit drives the upper cutter head to press the rubber core downward. At this time, the pin at the front end of the upper cutter head deflects downward to engage the rubber core a second time, forming a biting force that can effectively hold the rubber core and prevent it from slipping out. This ensures that the rubber core is smoothly separated from the gate plate groove, realizing the automated disassembly of the top sealing rubber core of the blowout preventer gate plate, reducing manual intervention, lowering the difficulty and labor intensity of operation, and improving safety.

[0018] The upper cutter head adopts a hinged connection, which makes the upper cutter head more flexible and adaptable to changes in angle, avoiding local tearing of the rubber core due to stress concentration and increasing the difficulty of disassembly. During disassembly, the pins play a role in positioning and fixing the rubber core, preventing the rubber core from slipping out between the upper and lower cutter heads during disassembly, thus improving the overall work efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a top view of the structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the disassembly blade assembly structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the upper cutter head assembly structure of the present invention;

[0023] Figure 5 This is a schematic diagram of the lower cutter head structure of the present invention;

[0024] Figure 6 This is a schematic diagram of the tool holder body structure of the present invention;

[0025] Figure 7 This is a schematic diagram of the mounting bracket structure of the present invention.

[0026] The meanings of the reference numerals in the figure are as follows: 1. Lifting device; 101. Lifting power device; 102. Mounting base; 103. Mounting plate; 104. Lifting shaft; 2. Rubber core removal tool holder; 201. Tool holder body; 202. Connecting plate; 3. Removal tool assembly; 301. Clamping power device; 302. Upper tool head assembly; 3021. Connecting rod; 3022. Upper tool head; 3023. Insert pin; 3024. Movable groove; 303. Lower tool head; 3031. Tool head inclined section; 3032. Tool head horizontal section; 3033. Tool body inclined section; 3034. Hanging lug; 304. Mounting bracket; 305. Slot; 306. T-shaped clamping platform; 307. Connection hole one; 4. Horizontal power device; 401. Guide block. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] The following is in conjunction with the instruction manual. Figure 1-7 The specific implementation of the present invention will be described in detail below.

[0029] A device for removing the sealing core of a blowout preventer gate includes a lifting device 1, a horizontally retractable core removal knife holder 2 rotatably mounted on the top of the lifting device 1, and a removal knife assembly 3 disposed inside the core removal knife holder 2.

[0030] The disassembly tool assembly 3 includes a mounting frame 304. A clamping power device 301 is provided on the top of the mounting frame 304. The power extension end of the clamping power device 301 passes vertically through the mounting frame 304 and is hinged to an upper cutter head 3022. A movable groove 3024 is provided on the upper cutter head 3022. A connecting rod 3021 is hinged in the movable groove 3024. The other end of the connecting rod 3021 is hinged to the mounting frame 304. A pin 3023 is detachably connected to the upper cutter head 3022 at the front end of the movable groove 3024. The tip of the pin 3023 faces downward. A lower cutter head 303 that works with the upper cutter head 3022 is detachably connected to the lower side wall of the mounting frame 304. The lower cutter head 303 has a horizontally arranged cutter head inclined section 3031, a cutter head horizontal section 3032, and a cutter body inclined section 3033 on its top.

[0031] In use, the inclined section 3031 of the lower cutter head 303 can be quickly inserted into the gap between the rubber core and the gate plate. While the lifting device 1 applies a continuous upward thrust to disengage the rubber core from the gate plate groove, the inclined section 3033 of the cutter body can decompose the vertical thrust of the lifting device 1 into a horizontal thrust, causing one side of the rubber core to tilt up and push the rear of the upper cutter head 3022 to deflect upward. At this time, the insert 3023 at the front end of the upper cutter head 3022 deflects downward to engage the rubber core a second time, forming a biting force that can effectively hold the rubber core. As it is lifted upward, the gripping force becomes tighter, preventing the rubber core from slipping out and ensuring that the rubber core is smoothly separated from the gate plate groove. This realizes the automated disassembly of the top sealing rubber core of the blowout preventer gate plate, reduces manual intervention, lowers the difficulty of operation and labor intensity, and improves safety.

[0032] It should be noted that the upper cutter head 3022 adopts a hinged connection, which makes the upper cutter head more flexible and better able to adapt to changes in angle, avoiding local tearing of the rubber core due to stress concentration and increasing the difficulty of disassembly; during the disassembly process, the insert pin 3023 plays a role in positioning and fixing the rubber core, preventing the rubber core from slipping out between the upper cutter head 3022 and the lower cutter head 303 during the disassembly process, thus improving the overall work efficiency.

[0033] See appendix Figure 1 The lifting device 1 includes a lifting power device 101, a mounting base 102, and a mounting plate 103. The mounting base 102 is fixedly installed on the top of the lifting power device 101, and the mounting plate 103 is fixedly connected to the top of the mounting base 102. A lifting shaft 104 is fixedly installed on the power extension end of the lifting power device 101. The lifting shaft 104 slides through the mounting base 102 and the mounting plate 103 and is rotatably connected to the bottom of the tool holder body 201.

[0034] It should be noted that the mounting base 102 provides support and guidance for the operation of the lifting shaft 104, and at the same time, the mounting base 102 supports the mounting plate 103, making it easy to fix the mounting plate 103 to the operating platform with bolts.

[0035] The mounting base 102 has an operating port on its side wall, which facilitates the installation of the power extension end of the lifting power device 101 with the lifting shaft 104 through a union joint.

[0036] The lifting power device 101 can be a hydraulic cylinder.

[0037] It should be noted that the hydraulic cylinder not only provides lifting and support for the rubber core removal tool holder 2, but also precisely adjusts and calibrates the height and horizontal position to ensure that the rubber core removal tool holder 2 and the rubber removal surface are kept on the same horizontal plane, which is beneficial for the subsequent removal of the rubber core and has a higher level of automation. The rubber core removal tool holder 2 can also be rotated to a position directly opposite the rubber core removal surface to ensure precise force is applied to it in the future.

[0038] See appendix Figure 1 Appendix Figure 2 As shown, the core removal tool holder 2 includes a tool holder body 201. The front end of the tool holder body 201 has a through slot. The rear end of the tool holder body 201 is detachably connected to a connecting plate 202. A horizontal power device 4 is fixedly installed on the connecting plate 202. The power extension end of the horizontal power device 4 slides through the connecting plate 202 and is connected to a guide block 401. The guide block 401 slides through the slot of the tool holder body 201. The front end of the guide block 401 has a T-shaped slot 1 that engages with the T-shaped locking table 306, and the rear end of the guide block 401 has a T-shaped slot 2 that engages with the power extension end of the horizontal power device 4.

[0039] Among them, the horizontal power unit 4 is a hydraulic cylinder.

[0040] In use, the hydraulic cylinder is fixedly mounted on the tool holder body 201 with bolts using the connecting plate 202. The T-shaped locking plate 306 set at the rear end of the mounting bracket 304 is inserted into the T-shaped groove one at the front end of the guide block 401 to complete the fixed connection between the guide block 401 and the disassembly tool assembly 3. The T-shaped locking groove two at the rear end of the guide block 401 is engaged with the power extension end of the horizontal power device 4. The power extension end of the hydraulic cylinder can drive the guide block 401 to move horizontally within the tool holder body 201. After determining the overall height and horizontal position of the disassembly tool assembly 3, its feed amount in the horizontal direction is further adjusted to ensure that the disassembly tool assembly 3 can smoothly cooperate with the glue core disassembly surface to complete the subsequent glue core disassembly.

[0041] It should be noted that the detachable connection of the rubber core removal tool holder 2 facilitates assembly and disassembly, making it easier for later maintenance. The simple structure ensures that the components are precisely aligned and force is applied more accurately during connection, resulting in high equipment adaptability.

[0042] See appendix Figure 3 To be continued Figure 5 As shown, the mounting bracket 304 has an L-shaped structure. A slot 305 is provided on the lower side wall of the vertical section of the mounting bracket 304. At least one connection hole 307 is provided on the mounting bracket 304 at the upper end of the slot 305. A hanging ear 3034 is provided at the rear end of the lower cutter head 303. A second connection hole corresponding to the first connection hole 307 is provided on the hanging ear 3034. The hanging ear 3034 is fixedly connected to the mounting bracket 304 by screws.

[0043] Among them, the clamping power device 301 is a cylinder. The cylinder is small in size, easy to install, and has high force control precision. It is easy to accurately control the up and down movement of the upper cutter head 3022. When used in conjunction with the lower cutter head 303, it is easier to remove the arc-shaped rubber core from the blowout preventer gate.

[0044] The following is in conjunction with the instruction manual appendix. Figure 1 To be continued Figure 7 The implementation principle of this invention is explained as follows:

[0045] In use, after clamping the gate, use the hydraulic cylinder to move the disassembly knife assembly 3 up and down to align it horizontally with the disassembly surface of the rubber core (arc-shaped rubber core). Rotate and adjust the direction of the rubber core disassembly knife holder 2 so that the upper knife head 3022 and the lower knife head 303 are aligned with the disassembly surface of the rubber core. Then operate the horizontal power device 4 (hydraulic cylinder) to insert the inclined section 3031 of the lower knife head 303 into the gap between the rubber core and the gate. Then use the horizontal section 3032 of the knife head and the inclined section of the knife body... 3033 fits well against the outer wall of the rubber core, facilitating precise force application. At this time, the telescopic end of the clamping power device 301 (cylinder) moves downwards, causing the rear end of the upper cutter head 3022 to move downwards. Since a connecting rod 3021 is hinged within the movable groove 3024 on the upper cutter head 3022, and the other end of the connecting rod 3021 is hinged to the mounting bracket 304, the front end of the upper cutter head 3022 moves upwards. The rubber core is then fixed by the pin 3023 at the front end of the upper cutter head 3022 and the lower cutter head 303. With the position fixed, a hydraulic cylinder provides a continuous upward thrust, while hydraulic cylinder 301 drives the upper cutter head 3022 to press the rubber core downward. Since the gate is fixed, the rubber core is quickly and smoothly pulled out of the gate groove. The lower cutter head 303, with its inclined section 3031, horizontal section 3032, and inclined section 3033, can quickly insert into the gap between the rubber core and the gate, while decomposing the vertical force into a horizontal force, thus smoothly separating the rubber core from the gate. The upper cutter head 3022 adopts a hinged connection, making its movement more flexible and adaptable to angle changes, avoiding stress concentration that could tear the rubber core. The entire rubber core disassembly process is highly automated, reducing manual intervention, lowering the difficulty and labor intensity of operation, and improving safety. The combination of the lifting power device and the rubber core disassembly cutter holder enables precise positioning and control, ensuring that the disassembly cutter assembly can accurately act on the rubber core disassembly surface, thus improving the disassembly accuracy.

[0046] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A blowout preventer ram top seal grommet removal device, characterized by, Including jacking device (1), jacking device (1) top rotation setting can horizontal telescopic rubber core dismounting tool rest (2), rubber core dismounting tool rest (2) setting dismounting tool assembly (3) in; The dismounting tool assembly (3) includes a mounting frame (304), and the mounting frame (304) is provided with a pressing power device (301) at the top. The power telescopic end of the pressing power device (301) vertically penetrates the mounting frame (304) and is hingedly connected with an upper tool head (3022). An active slot (3024) is formed in the upper tool head (3022), and a connecting rod (3021) is hingedly connected in the active slot (3024). The other end of the connecting rod (3021) is hingedly connected with the mounting frame (304). A plug pin (3023) is detachably connected to the upper tool head (3022) at the front end of the active slot (3024), and the tip of the plug pin (3023) faces downward. The lower tool head (303) is detachably connected to the side wall of the lower part of the mounting frame (304) and is used in cooperation with the upper tool head (3022). The top of the lower tool head (303) is provided with a tool head inclined section (3031), a tool head horizontal section (3032) and a tool body inclined section (3033) in sequence in the horizontal direction. The rubber core dismounting tool rest (2) includes a tool rest body (201), and the tool rest body (201) is provided with a slot hole penetrating front and back at the front end. A connecting plate (202) is detachably connected to the rear end of the tool rest body (201), and a horizontal power device (4) is fixedly installed on the connecting plate (202). The power telescopic end of the horizontal power device (4) slidably penetrates the connecting plate (202) and is connected with a guide block (401). The guide block (401) slidably penetrates the slot hole in the tool rest body (201).

2. The preventer ram top seal gland puller of claim 1, wherein, The front end of the guide block (401) is provided with a T-shaped clamping groove one for clamping the T-shaped clamping table (306), and the rear end of the guide block (401) is provided with a T-shaped clamping groove two for clamping the power telescopic end of the horizontal power device (4).

3. The blowout preventer ram top seal gland removal device of claim 1 or 2, wherein, The mounting frame (304) is in L-shaped structure, and the lower part of the vertical section of the mounting frame (304) is provided with a clamping groove (305). At least one connecting hole one (307) is formed in the mounting frame (304) at the upper end of the clamping groove (305). The rear end of the lower tool head (303) is provided with a hanging ear (3034), and the hanging ear (3034) is provided with a connecting hole two corresponding to the connecting hole one (307). The hanging ear (3034) is fixedly connected with the mounting frame (304) through screws.

4. The preventer ram top seal gland puller of claim 3, wherein, The jacking device (1) includes a jacking power device (101), a mounting seat (102) and a mounting plate (103). The jacking power device (101) is fixedly installed with the mounting seat (102) at the top. The mounting seat (102) is fixedly connected with the mounting plate (103) at the top. The power telescopic end of the jacking power device (101) is fixedly installed with a lifting shaft (104). The lifting shaft (104) slidably penetrates the mounting seat (102) and the mounting plate (103) and is rotatably connected with the bottom of the tool rest body (201).

5. The blowout preventer ram top seal gland removal device of claims 1 or 2, wherein, The jacking device (1) comprises a jacking power device (101), a mounting seat (102) and a mounting plate (103); the jacking power device (101) is fixedly installed at the top with the mounting seat (102), the mounting seat (102) is fixedly connected at the top with the mounting plate (103), the power telescopic end of the jacking power device (101) is fixedly installed with a lifting shaft (104), the lifting shaft (104) is slidably penetrated through the mounting seat (102) and the mounting plate (103) and is rotatably connected with the bottom of the tool holder body (201).

6. The preventer ram top seal gland puller of claim 5, wherein, An operation opening is formed in the side wall of the mounting seat (102).

7. The blowout preventer ram top seal gland removal device of claims 1 or 2, wherein, The horizontal power device (4) is a hydraulic cylinder.

8. The preventer ram top seal gland puller apparatus of claim 4, wherein, The jacking power device (101) is a hydraulic cylinder.

9. The preventer ram top seal gland dismounting device according to claim 1 or 2 or 4 or 6 or 8, characterized in that, The pressing power device (301) is a pneumatic cylinder.

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