Blowout preventer ram top seal grommet positioning pin removal device

Abstract

The present application relates to the technical tool field of oilfield equipment maintenance, and particularly relates to a blowout preventer ram top sealing rubber core positioning pin dismounting device, which comprises a support assembly, the support assembly comprises a bottom plate, the bottom plate is fixedly connected with a support vertical rod, the top of the support vertical rod is rotationally connected with a support horizontal rod through a rotating shaft, a cylinder is arranged on the support horizontal rod, the retractable end of the cylinder is fixedly connected with a mounting support, a hoisting support is rotationally connected on the mounting support, and a pneumatic knocking hammer is arranged in the hoisting support; a pin pulling chain is hingedly connected at the bottom of the hoisting support, a pin pulling piece is hingedly connected at the lower end of the pin pulling chain, and a pin pulling hole is formed through the lower end of the pin pulling piece; the present application provides stable and controllable upward pulling force for the positioning pin by means of the cylinder, and the impact force of the pneumatic knocking hammer is further matched, the pin pulling piece can adapt to displacement and angle changes by means of the soft connection of the pin pulling chain when the pneumatic knocking hammer repeatedly impacts, the positioning pin is impacted by impact force of different angles, and mechanical damage to the blowout preventer ram caused by stress concentration is avoided.

Description

Technical Field

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

[0002] Blowout preventers play a crucial role in fields involving high-pressure fluid control, such as oil extraction. As a critical component, the gate of the blowout preventer (BOP) directly affects the safety and reliability of the entire BOP. The sealing performance of the gate's rubber core, a key sealing element in the gate BOP, directly determines whether the BOP can function properly, effectively preventing blowout accidents. Frequent opening and closing operations cause friction between the gate's rubber core and other components such as the gate and tubing, leading to mechanical wear on the core surface. Impurities, sand, and other foreign objects inside the BOP or on the tubing can become trapped between the rubber core and metal components when the gate is closed, exacerbating wear. Furthermore, the fluid media in the oil and gas well (such as acidic gases and brine) can chemically corrode the rubber core. Combined with the effects of high temperature and high pressure environments, the BOP's rubber core is prone to wear, requiring frequent maintenance and replacement, typically every six months. Gate rubber cores are generally divided into two groups: a top sealing core and a flat sealing core. The top sealing core is fixed to the gate by a locating pin to ensure stable sealing under complex operating conditions.

[0003] When disassembling the blowout preventer (BOP) gate seal core, the locating pin, due to its long-term exposure to high pressure and corrosive environment, is prone to rust and adhesion to surrounding components. Therefore, only the arc-shaped core body can be removed, while the locating pin remains inserted in the gate body, requiring further removal. Traditional disassembly methods often rely on manual labor using simple tools such as hammers and pry bars, making disassembly difficult. Furthermore, manual operation lacks precision in applying force, resulting in uneven force that can easily damage the locating pin itself and cause irreparable mechanical damage to the gate and surrounding precision components, affecting the overall sealing performance of the BOP and even posing safety hazards. Additionally, manual disassembly is inefficient and cannot meet the needs of rapid production recovery in emergency repair scenarios. Therefore, there is an urgent need for a highly efficient, precise, and non-invasive BOP gate seal core locating pin disassembly device to meet the demands of modern petroleum industry development. Summary of the Invention

[0004] To overcome the above problems, the present invention provides a device for disassembling the positioning pin of the sealing core of the blowout preventer gate.

[0005] The technical embodiment of the present invention is a disassembly device for the positioning pin of the sealing core of the blowout preventer gate, including a bracket assembly. The bracket assembly includes a base plate, on which a vertical support rod is fixedly connected. A horizontal support rod is rotatably connected to the top of the vertical support rod via a rotating shaft. A cylinder is provided on the horizontal support rod. A cylinder connector is fixedly connected to the telescopic end of the cylinder. A cylinder connector pressure plate is fixedly snapped onto the end of the cylinder connector. The cylinder connector pressure plate is fixedly connected to the top of the mounting bracket. The bottom of the mounting bracket is fixedly connected to the top of the pneumatic hammer.

[0006] A hoisting bracket is rotatably connected to the mounting bracket. A pneumatic hammer is installed inside the hoisting bracket. The hammer head slides through the bottom of the mounting bracket and acts on the top of the hoisting bracket. An air source connector is provided at the bottom of the pneumatic hammer.

[0007] The bottom of the hoisting bracket is threaded with a chain connector. The top of the chain connector passes through the bottom of the hoisting bracket and is fixed by a nut. The bottom of the chain connector has a movable groove, and a pin puller chain is hinged in the movable groove. A pin puller plate is hinged to the lower end of the pin puller chain. A pin puller hole is opened through the lower end of the pin puller plate. The inner wall of the pin puller hole slopes from bottom to top.

[0008] Preferably, the lower end of the pin-pulling chain is hinged to a pin-pulling connector, the top of the pin-pulling connector is provided with a movable groove two, the lower end of the pin-pulling chain is hinged in the movable groove two, the bottom of the pin-pulling connector is provided with a movable groove three, and the upper end of the pin-pulling piece is hinged in the movable groove three.

[0009] Preferably, the support column is equipped with two solenoid valve switches that control the cylinder and the pneumatic hammer respectively.

[0010] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0011] This invention utilizes a cylinder to provide a stable and controllable upward pulling force to the positioning pin, combined with the vibration of a pneumatic hammer, and a pin-pulling plate to provide an upward impact force to the positioning pin, making it easier to remove the positioning pin from the gate. Simultaneously, the pin-pulling plate is flexibly connected to the pneumatic hammer via a pin-pulling chain, thus adapting to changes in the displacement and angle of the pin-pulling plate as the pneumatic hammer moves up and down. This allows the positioning pin to be subjected to impact forces from the pin-pulling plate at different angles, and the uniform force distribution prevents mechanical damage to the gate due to stress concentration, extending the equipment's service life. The inclined through holes at both ends of the pin-pulling plate effectively hold the positioning pin in place during upward pulling, preventing it from detaching from the pin-pulling plate and improving the success rate of disassembly. The crossbar and vertical bar of the support are angle-adjustable via a pivot, and together with the base plate, they can adapt to different operating surfaces, making the overall equipment highly flexible in use. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0013] Figure 2 This is a schematic diagram of the pin disassembly mechanism of the present invention.

[0014] Figure 3 This is a schematic diagram of the installation structure of the pneumatic hammer of the present invention.

[0015] Figure 4 This is a schematic diagram of the cylinder connector pressure plate of the present invention.

[0016] Figure 5 This is a schematic diagram of the structure of the pneumatic hammer mounting bracket of the present invention.

[0017] Figure 6 This is a schematic diagram of the chain connector of the present invention.

[0018] Figure 7 This is a schematic diagram of the structure of the pin-pulling connector of the present invention.

[0019] Figure 8 This is a schematic diagram of the structure of the pin puller of the present invention.

[0020] The meanings of the reference numerals in the figure are as follows: 1. Support assembly; 101. Base plate; 102. Support vertical rod; 103. Solenoid valve switch; 104. Support horizontal rod; 2. Pin removal mechanism; 201. Cylinder; 202. Cylinder connector; 203. Cylinder connector pressure plate; 204. Mounting bracket; 205. Pneumatic hammer; 206. Lifting bracket; 207. Chain connector; 208. Pin-pulling chain; 209. Pin-pulling connector; 210. Pin-pulling plate; 211. Pin-pulling hole; 212. Air source connector; 213. Movable slot one; 214. Movable slot two; 215. Movable slot three. Detailed Implementation

[0021] 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.

[0022] The following is in conjunction with the instruction manual. Figures 1 to 8 The specific implementation of the present invention will be described in detail below.

[0023] A device for disassembling the locating pin of the sealing core of a blowout preventer gate includes a bracket assembly 1. The bracket assembly 1 includes a base plate 101. A bracket vertical rod 102 is fixedly connected to the base plate 101. A bracket horizontal rod 104 is rotatably connected to the top of the bracket vertical rod 102 via a rotating shaft. A cylinder 201 is provided on the bracket horizontal rod 104. An installation bracket 204 is fixed to the telescopic end of the cylinder 201. A hoisting bracket 206 is rotatably connected to the installation bracket 204. A pneumatic hammer 205 is provided inside the hoisting bracket 206. The striking head of the pneumatic hammer 205 slides through the bottom of the installation bracket 204 and acts on the top of the hoisting bracket 206. An air source connector 212 is provided at the bottom of the pneumatic hammer 205.

[0024] The bottom of the hoisting bracket 206 is hinged with a pull pin chain 208, and the lower end of the pull pin chain 208 is hinged with a pull pin plate 210, and the lower end of the pull pin plate 210 has a pull pin hole 211.

[0025] In use, the positioning pin and the lifting bracket 206 are flexibly connected by the pin puller 210 and the pin puller chain 208. The pneumatic hammer 205 and the cylinder 201 are connected to an external air source. The cylinder 201 can provide a stable and controllable upward pulling force to the positioning pin, while the pneumatic hammer 205 repeatedly hammers the lifting bracket 206 upward. The lifting bracket 206 provides an upward impact force to the positioning pin. The flexible connection between the positioning pin and the lifting bracket 206 through the pin puller chain 208 can adapt to changes in the displacement and angle of the pin puller 210. This allows the positioning pin to be subjected to impact forces from the pin puller 210 at different angles. The uniform force distribution prevents the gate from mechanical damage caused by stress concentration and extends the service life of the equipment.

[0026] See appendix Figure 1-7 As shown, the telescopic end of the cylinder 201 is fixedly connected to the cylinder connector 202, the end of the cylinder connector 202 is fixedly snapped with the cylinder connector pressure plate 203, the cylinder connector pressure plate 203 is fixedly connected to the top of the mounting bracket 204, and the bottom of the mounting bracket 204 is fixedly connected to the top of the pneumatic hammer 205. The bottom of the hoisting bracket 206 is threaded with a chain connector 207. The top of the chain connector 207 passes through the bottom of the hoisting bracket 206 and is fixed by a nut. The bottom of the chain connector 207 has a movable groove 213. The upper end of the pull pin chain 208 is hinged in the movable groove 213. The lower end of the pull pin chain 208 is hinged with a pull pin connector 209. The top of the pull pin connector 209 has a movable groove 214. The lower end of the pull pin chain 208 is hinged in the movable groove 214. The bottom of the pull pin connector 209 has a movable groove 215. The upper end of the pull pin plate 210 is hinged in the movable groove 215.

[0027] It should be noted that the cylinder connector 202 end is fixed to the cylinder connector pressure plate 203 by a snap-fit ​​method, which facilitates subsequent disassembly and installation; the cylinder connector pressure plate 203 is fixed to the mounting bracket 204, and the hoisting bracket 206 is fixed to the chain connector 207 by bolts, which facilitates the disassembly and maintenance of the device; the top of the pin-pulling chain 208 is hinged to the hoisting bracket 206 through the chain connector 207, and the bottom of the pin-pulling chain 208 is hinged to the pin-pulling piece 210 through the pin-pulling connector 209. This ensures that when the pneumatic hammer 205 applies impact force, there will be no torque transmission, and the force can be better transmitted to the pin-pulling piece 210. The pin-pulling piece 210 has a wider range of freedom of movement, avoiding stress concentration caused by constraint torque and mechanical damage to the gate.

[0028] See appendix Figure 8 As shown, the inner wall of the pin-pulling hole 211 is inclined from bottom to top, which allows the pin-pulling piece 210 to effectively hold the positioning pin during the upward pulling process, preventing it from detaching from the pin-pulling piece 210, further improving the success rate of positioning pin disassembly, and preventing the pin-pulling piece 210 from deforming. It should be noted that the pin-pulling piece 210 can be designed in various specifications, that is, the size of the pin-pulling hole 211 is determined according to the positioning pin. In actual use, the pin-pulling piece 210 that matches the positioning pin can be selected, which improves the flexibility of the overall equipment.

[0029] See appendix Figure 1 As shown, the angle of the rotating bracket crossbar 104 can be adjusted according to actual working needs, quickly aligning the pull pin 210 and the positioning pin.

[0030] The support column 102 is equipped with two solenoid valve switches 103 that control the cylinder 201 and the pneumatic hammer 205 respectively. The opening and closing of the cylinder 201 and the pneumatic hammer 205 are controlled by the solenoid valve switches 103.

[0031] The following is in conjunction with the appendix Figure 1 To be continued Figure 8 The specific implementation principle of this invention is explained in detail:

[0032] When the arc-shaped sealing surface rubber core is removed from the gate plate while the positioning pin is still on the gate plate, first fix the gate plate to the operating table, then fix the base plate 101 to the operating table with bolts. Connect the cylinder 201 and the pneumatic hammer 205 to the external air source. Adjust the angle by rotating the support crossbar 104 according to the actual working needs, so that the pin-pulling piece 210 is directly above the positioning pin. Operate the solenoid valve switch 103 to make the cylinder 201 drive the mounting bracket 204 to move downward. At this time, the pneumatic hammer 205 moves downward as a whole. When the inclined hole on the pin-pulling piece 210 can be aligned with the positioning pin, stop the cylinder 201 and insert the positioning pin into the inclined through hole on the pin-pulling piece 210. At this time, use the solenoid valve switch 103 to start the pneumatic hammer 205. 05 is working, which simultaneously causes the telescopic head of cylinder 201 to move upward. The inclined through holes at both ends of the pin-pulling plate 210 can effectively lock the positioning pin during the upward pulling process, preventing it from detaching from the pin-pulling plate 210. The striking head of the pneumatic hammer 205 repeatedly hammers the lifting bracket 206 upward. The repeated upward impact force of the lifting bracket 206 on the positioning pin gradually loosens the positioning pin on the gate plate. Combined with the upward pulling force of cylinder 201, the positioning pin can be removed from the gate plate, improving the success rate of disassembly. During the disassembly process, the pin-pulling chain 208 is used to connect the positioning pin so that it is subjected to the impact force of the pin-pulling plate 210 at different angles, avoiding mechanical damage to the blowout preventer gate plate due to stress concentration, which would affect the overall sealing performance of the blowout preventer.

[0033] 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 positioning pin removal device comprising a bracket assembly (1), characterized in that, The support assembly (1) comprises a bottom plate (101), the bottom plate (101) is fixedly connected with a support vertical rod (102), the top of the support vertical rod (102) is rotatably connected with a support horizontal rod (104), the support horizontal rod (104) is provided with a gas cylinder (201), the telescopic end of the gas cylinder (201) is fixedly connected with a gas cylinder joint (202), the end of the gas cylinder joint (202) is fixedly connected with a gas cylinder joint pressing plate (203), the gas cylinder joint pressing plate (203) is fixedly connected with the top of a mounting support (204), and the bottom of the mounting support (204) is fixedly connected with the top of a pneumatic hammer (205). The mounting support (204) is rotatably connected with a hoisting support (206), the hoisting support (206) is provided with the pneumatic hammer (205), the knocking head of the pneumatic hammer (205) is slidably connected with the bottom of the mounting support (204) and acts on the top of the hoisting support (206), and the bottom of the pneumatic hammer (205) is provided with an air source joint (212); The bottom of the hoisting support (206) is threadedly connected with a chain connecting head (207), the top of the chain connecting head (207) penetrates through the bottom of the hoisting support (206) and is fixed by a nut, the bottom of the chain connecting head (207) is provided with a movable groove one (213), and the movable groove one (213) is hingedly connected with a pin pulling chain (208); the lower end of the pin pulling chain (208) is hingedly connected with a pin pulling piece (210), the lower end of the pin pulling piece (210) penetrates through a pin pulling hole (211), and the hole inner wall of the pin pulling hole (211) is inclined from bottom to top.

2. A blowout preventer ram top seal grommet positioning pin removal device according to claim 1, wherein, The lower end of the pin pulling chain (208) is hingedly connected with a pin pulling connecting head (209), the top of the pin pulling connecting head (209) is provided with a movable groove two (214), the lower end of the pin pulling chain (208) is hingedly connected in the movable groove two (214), and the bottom of the pin pulling connecting head (209) is provided with a movable groove three (215), and the upper end of the pin pulling piece (210) is hingedly connected in the movable groove three (215).

3. A blowout preventer ram top seal grommet positioning pin removal device according to claim 1 or 2, wherein, The support vertical rod (102) is provided with two electromagnetic valve switches (103) for controlling the gas cylinder (201) and the pneumatic hammer (205) respectively.

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