Wellhead hydraulic control blowout preventer

Abstract

The utility model discloses a wellhead hydraulic control blowout preventer belongs to wellhead blowout preventer technical field, and its technical scheme main points include wellhead blowout preventer body, adaptive mechanism and adjusting mechanism, adaptive mechanism sets up the output shaft of wellhead blowout preventer body inside, adjusting mechanism sets up adaptive mechanism's surface, adaptive mechanism includes positioning jaw, contact air bag, drainage air pipe, spacing jaw, adaptive air bag and shunt air pipe, through setting adaptive mechanism, wellhead blowout preventer body is wellhead blowout preventer equipment in prior art, and with hydraulic control system and its supporting hydraulic control equipment, can drive the spacing of positioning jaw and spacing jaw between output shaft through hydraulic control equipment and adjust, wherein can limit oil delivery pipeline between output shaft, and the spacing between spacing jaw and positioning jaw is changed by output shaft, can make positioning jaw drive contact air bag and adaptive air bag on spacing jaw close.

Description

Technical Field

[0001] This utility model relates to the field of wellhead blowout prevention technology, and in particular to a wellhead hydraulic control blowout prevention device. Background Technology

[0002] As is well known, blowout preventers (BOPs) are key equipment used in wellhead operations to control wellhead pressure and prevent blowout accidents. Typically driven by a hydraulic control system, they can quickly close the wellhead to stop fluid leakage and are widely used in oil and gas drilling and workover operations. They use hydraulic power to actuate core components such as the gate and BOP, enabling rapid response to abnormal wellhead pressure, ensuring operational safety, and are crucial equipment for maintaining wellhead pressure balance and preventing oil and gas leaks.

[0003] Existing blowout preventers are prone to bolt loosening when there is vibration in the pipeline or other external environment. This can cause uneven stress on the sealing ring at the connection, leading to breakage, deformation, and reduced sealing effect, resulting in leakage at the connection.

[0004] An existing patent (publication number: CN221096472U) discloses a wellhead blowout preventer with good sealing performance, including a wellhead blowout preventer body. Pipes are provided at both ends of the wellhead blowout preventer body. An installation plate and a bearing are provided on the pipes. An adjusting plate is provided on the bearing. A sealing ring and an installation mechanism are provided on the installation plate. The installation mechanism includes an installation hole and a strip-shaped hole. The installation hole is located on the installation plate, and the strip-shaped hole is located on the adjusting plate. Multiple installation mechanisms are provided and arranged in a circular array. A fastening mechanism is provided between the adjusting plate and one end of the wellhead blowout preventer body. This structure can be reliably and stably assembled with an external pipeline through the installation mechanism and the fastening mechanism, thereby ensuring the sealing performance of the sealing ring and preventing leakage at the connection due to loose threaded bolts.

[0005] To address the aforementioned issues, existing patents have provided solutions. However, when performing blowout prevention sealing operations on wellheads, the lack of an adaptive multi-layer sealing structure for wellhead pipelines makes it impossible to perform adaptive multi-layer sealing on wellhead pipelines, thus reducing the flexibility of wellhead pipelines during blowout prevention sealing.

[0006] Therefore, a wellhead hydraulic control blowout prevention device is proposed. Utility Model Content

[0007] The purpose of this invention is to provide a wellhead hydraulic control blowout preventer that can solve the problem that existing devices lack an adaptive multi-layer sealing structure for wellhead pipelines, thus reducing the flexibility of wellhead pipelines during blowout prevention.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a wellhead hydraulic control blowout preventer (BOP) device, comprising a wellhead BOP body, an adaptation mechanism, and an adjustment mechanism. The adaptation mechanism is located on the output shaft inside the wellhead BOP body, and the adjustment mechanism is located on the surface of the adaptation mechanism. The adaptation mechanism includes a positioning gripper, a contact airbag, a drainage air pipe, a limiting gripper, an adaptation airbag, and a diversion air pipe. The positioning gripper is fixedly connected to the output shaft on the rear side of the wellhead BOP body, the contact airbag is fixedly connected to the front side of the positioning gripper, the drainage air pipe connects to both sides of the contact airbag, the limiting gripper is fixedly connected to the output shaft on the front side of the wellhead BOP body, the adaptation airbag is fixedly connected to the rear side of the limiting gripper, and the diversion air pipe connects to both sides of the adaptation airbag.

[0009] Preferably, the adjustment mechanism includes a connecting component and a mounting component. The connecting component is disposed on the surface of the positioning gripper and the surface of the limiting gripper, respectively, and the mounting component is disposed inside the connecting component.

[0010] Preferably, the connecting component includes connecting buckles, connecting slots, and assembly slots. The four connecting buckles are fixedly connected to the top and bottom of the positioning gripper and the limiting gripper, respectively. The four connecting slots are respectively opened at the top and bottom of the positioning gripper and the limiting gripper, and the assembly slots are respectively opened at the top of the positioning gripper and the top of the limiting gripper.

[0011] Preferably, the mounting assembly includes a mounting rod, a connecting rod, and a connecting groove. The mounting rod is snapped into the inner side of the mounting groove, the connecting rod is fixedly connected to the bottom of the mounting rod, and the connecting groove is formed at the top of the mounting rod.

[0012] Preferably, an auxiliary reinforcing plate is fixedly connected to the rear side of the positioning gripper and the front side of the limiting gripper, and the inner side of the auxiliary reinforcing plate is fixedly connected to the output shaft inside the body of the wellhead blowout preventer.

[0013] Preferably, both the surface of the contact airbag and the surface of the adaptation airbag are provided with a buffer sleeve, and the surface of the buffer sleeve is provided with anti-slip texture.

[0014] Preferably, the bottom of the inner side of the assembly slot is provided with auxiliary positioning slots, and there are a total of six auxiliary positioning slots.

[0015] Preferably, the bottom of the mounting rod is fixedly connected to an auxiliary positioning rod, and there are six auxiliary positioning rods in total. The surface of the auxiliary positioning rod is engaged with the inner side of the auxiliary positioning groove.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This application, by setting an adaptation mechanism, uses a wellhead blowout preventer body that is a conventional wellhead blowout preventer device, equipped with its own hydraulic control system and supporting hydraulic control equipment. The hydraulic control equipment can drive the output shaft to adjust the distance between the positioning jaws and the limiting jaws. This allows the oil delivery pipeline to be limited between the output shafts. The change in the distance between the limiting jaws and the positioning jaws by the output shaft allows the positioning jaws to move the contact airbag closer to the adaptation airbag on the limiting jaws, thereby clamping the oil delivery pipeline and reducing the cross-section of the oil delivery pipeline to prevent accidental ejection of oil from the pipeline. When the contact airbag and the adaptation airbag contact the surface of the oil delivery pipeline, the oil inside the pipeline will... The pressure gradually flows from the oil source to the oil discharge port. Therefore, the contact airbags and adapting airbags near the oil source of the oil delivery pipeline will experience more pressure from the surface of the oil delivery pipeline due to the expansion of the oil at the oil source caused by the increased pressure. As a result, the contact airbags near the oil source will transport gas to the contact airbags away from the oil source through the drainage air pipe, and the adapting airbags near the oil source will transport gas to the adapting airbags away from the oil source through the diversion air pipe. This causes the contact airbags and adapting airbags away from the oil source to expand further, achieving a further sealing effect on the oil delivery pipeline.

[0018] 2. This application, by setting an adjustment mechanism, allows the connecting component to be used in conjunction with the installation component. Through connecting buckles and connecting slots, positioning jaws and limiting jaws with connecting slots can be connected to positioning jaws and limiting jaws with connecting buckles, thus achieving the effect of connecting multiple positioning jaws and limiting jaws to form a whole. This increases the number of positioning jaws and limiting jaws, further enhancing the sealing and anti-spraying effect on the oil conveying pipeline. Through the stackable connection structure composed of the mounting rod, connecting rod, and connecting slot, when the mounting rod is installed in the assembly slot, the current connecting rod can be connected to the connecting slot on another mounting rod, achieving the effect of connecting the positioning jaws and limiting jaws currently connected to the connecting rod to the positioning jaws and limiting jaws on another connecting rod, further increasing the stability when the limiting jaws and positioning jaws form a whole. Attached Figure Description

[0019] Figure 1 This is an overall structural diagram of the wellhead hydraulic control blowout preventer of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the adaptive mechanism of this utility model;

[0021] Figure 3This is a schematic diagram of the adjustment mechanism of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the connecting component of this utility model;

[0023] Figure 5 This is a schematic diagram of the installation component of this utility model.

[0024] In the diagram, 1. Wellhead blowout preventer body; 2. Adaptation mechanism; 21. Positioning gripper; 22. Contact airbag; 23. Drainage air pipe; 24. Limiting gripper; 25. Adaptation airbag; 26. Diverting air pipe; 27. Auxiliary reinforcement plate; 28. Buffer sleeve; 3. Adjustment mechanism; 31. Connecting assembly; 311. Connecting buckle; 312. Connecting slot; 313. Assembly slot; 314. Auxiliary positioning slot; 32. Installation assembly; 321. Installation rod; 322. Connecting rod; 323. Connecting slot; 324. Auxiliary positioning rod. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-5 The present invention provides the following technical solution:

[0027] A wellhead hydraulic control blowout preventer includes a wellhead blowout preventer body 1, an adaptation mechanism 2, and an adjustment mechanism 3. The adaptation mechanism 2 is located on the output shaft inside the wellhead blowout preventer body 1, and the adjustment mechanism 3 is located on the surface of the adaptation mechanism 2. The adaptation mechanism 2 includes a positioning gripper 21, a contact airbag 22, a drainage air pipe 23, a limiting gripper 24, an adaptation airbag 25, and a diversion air pipe 26. The positioning gripper 21 is fixedly connected to the output shaft on the rear side inside the wellhead blowout preventer body 1, the contact airbag 22 is fixedly connected to the front side of the positioning gripper 21, the drainage air pipe 23 connects to both sides of the contact airbag 22, the limiting gripper 24 is fixedly connected to the output shaft on the front side inside the wellhead blowout preventer body 1, the adaptation airbag 25 is fixedly connected to the rear side of the limiting gripper 24, and the diversion air pipe 26 connects to both sides of the adaptation airbag 25.

[0028] In this embodiment: by setting the adaptation mechanism 2, the wellhead blowout preventer body 1 is a wellhead blowout preventer device in the prior art, which has its own hydraulic control system and its supporting hydraulic control equipment. The hydraulic control equipment can drive the output shaft to adjust the distance between the positioning jaw 21 and the limiting jaw 24. The oil delivery pipeline can be limited between the output shaft. By changing the distance between the limiting jaw 24 and the positioning jaw 21 by the output shaft, the positioning jaw 21 can drive the contact airbag 22 and the adaptation airbag 25 on the limiting jaw 24 to move closer, thereby clamping the oil delivery pipeline and reducing the cross-section of the oil delivery pipeline to prevent the oil in the oil delivery pipeline from being accidentally ejected. When the contact airbag 22 and the adaptation airbag 25 come into contact with the surface of the oil delivery pipeline, the oil in the oil delivery pipeline will... Due to pressure, the oil gradually flows from the oil source to the oil discharge port. Therefore, the contact airbag 22 and the adapting airbag 25 near the oil source of the oil delivery pipeline will experience more pressure from the surface of the oil delivery pipeline due to the expansion of the oil at the oil source as the pressure increases. As a result, the contact airbag 22 near the oil source will transport gas to the contact airbag 22 away from the oil source through the drainage air pipe 23, and the adapting airbag 25 near the oil source will transport gas to the adapting airbag 25 away from the oil source through the diversion air pipe 26. This causes the contact airbag 22 and the adapting airbag 25 away from the oil source to expand further, achieving a further sealing effect on the oil delivery pipeline.

[0029] Specifically, such as Figure 3 As shown, the adjustment mechanism 3 includes a connecting component 31 and a mounting component 32. The connecting component 31 is respectively disposed on the surface of the positioning gripper 21 and the surface of the limiting gripper 24, and the mounting component 32 is disposed on the inner side of the connecting component 31.

[0030] Specifically, such as Figure 4 As shown, the connecting component 31 includes connecting buckles 311, connecting slots 312, and assembly slots 313. The four connecting buckles 311 are fixedly connected to the top and bottom of the positioning gripper 21 and the limiting gripper 24, respectively. The four connecting slots 312 are respectively opened at the top and bottom of the positioning gripper 21 and the limiting gripper 24, respectively. The assembly slots 313 are respectively opened at the top of the positioning gripper 21 and the top of the limiting gripper 24.

[0031] Specifically, such as Figure 5 As shown, the mounting assembly 32 includes a mounting rod 321, a connecting rod 322, and a connecting groove 323. The mounting rod 321 is snapped into the inner side of the assembly groove 313, the connecting rod 322 is fixedly connected to the bottom of the mounting rod 321, and the connecting groove 323 is formed at the top of the mounting rod 321.

[0032] In this embodiment: By setting the adjustment mechanism 3, the connecting component 31 can be used in conjunction with the installation component 32. Through the connection buckle 311 and the connection slot 312, the positioning jaws 21 and limiting jaws 24 with the connection slot 312 can be connected to each other, thereby achieving the effect of connecting multiple positioning jaws 21 and limiting jaws 24 to form a whole. This increases the number of positioning jaws 21 and limiting jaws 24, further enhancing the sealing of the oil conveying pipeline. The anti-spray effect is achieved through the stackable connection structure formed by the mounting rod 321, connecting rod 322, and connecting groove 323. When the mounting rod 321 is installed in the assembly slot 313, the current connecting rod 322 can be connected to the connecting groove 323 on another mounting rod 321. This allows the positioning claw 21 and limiting claw 24 currently connected to the connecting rod 322 to be connected to the positioning claw 21 and limiting claw 24 on another connecting rod 322, further increasing the stability when the limiting claw 24 and the positioning claw 21 form a whole.

[0033] Specifically, such as Figure 2 As shown, auxiliary reinforcing plates 27 are fixedly connected to the rear side of the positioning gripper 21 and the front side of the limiting gripper 24. The inner side of the auxiliary reinforcing plates 27 is fixedly connected to the output shaft inside the wellhead blowout preventer body 1.

[0034] Specifically, such as Figure 2 As shown, both the surface of the contact airbag 22 and the surface of the adaptation airbag 25 are provided with a buffer sleeve 28, and the surface of the buffer sleeve 28 is provided with anti-slip texture.

[0035] In this embodiment: by setting an auxiliary reinforcement plate 27 and a buffer sleeve 28, the auxiliary reinforcement plate 27 can cooperate with the positioning claw 21 and the limiting claw 24. The auxiliary reinforcement plate 27 reinforces the connection between the output shaft of the wellhead blowout preventer body 1 and the positioning claw 21 and the limiting claw 24, which can further increase the stability when the output shaft of the wellhead blowout preventer body 1 is connected to the positioning claw 21 and the limiting claw 24. The buffer sleeve 28 can cooperate with the contact airbag 22 and the adapting airbag 25. The buffer sleeve 28 protects the surface of the contact airbag 22 and the adapting airbag 25. The anti-slip texture on the surface of the buffer sleeve 28 can further increase the stability when the contact airbag 22 and the adapting airbag 25 are in contact with the surface of the oil delivery pipeline, thereby improving the stability when the oil delivery pipeline is closed for blowout prevention.

[0036] Specifically, such as Figure 4 As shown, an auxiliary positioning groove 314 is provided at the bottom of the inner side of the assembly slot 313, and there are six auxiliary positioning grooves 314 in total.

[0037] Specifically, such as Figure 5As shown, an auxiliary positioning rod 324 is fixedly connected to the bottom of the mounting rod 321. There are six auxiliary positioning rods 324 in total, and the surface of the auxiliary positioning rod 324 is engaged with the inner side of the auxiliary positioning groove 314.

[0038] In this embodiment: by setting the auxiliary positioning groove 314 and the auxiliary positioning rod 324, the mounting component 32 can be used in conjunction with the auxiliary positioning rod 324. When the connecting rod 322 passes through the assembly slot 313 and connects to the connecting groove 323 on another mounting rod 321, the movement of the auxiliary positioning rod 324 in the auxiliary positioning groove 314 can assist in limiting the movement of the mounting rod 321, and can further increase the stability of the mounting rod 321 when it is installed in the assembly slot 313.

[0039] Working principle: First, install the blowout preventer body 1 on the wellhead where blowout prevention is required. Then, place the oil delivery pipeline between the positioning jaw 21 and the limiting jaw 24 inside the blowout preventer body 1. Next, install the positioning jaw 21 and the limiting jaw 24 with the connecting slot 312 onto the positioning jaw 21 and the limiting jaw 24 with the connecting buckle 311. Then, insert the mounting rod 321 into the assembly slot 313 until the current connecting rod 322 passes through the assembly slot 313 and engages with the connecting slot 323 on another mounting rod 321. After that, when blowout prevention is required, the blowout preventer body 1 can control the output shaft through its hydraulic control system to reduce the distance between the positioning jaw 21 and the limiting jaw 24. The small size allows the positioning gripper 21 to drive the contact airbag 22 and the limiting gripper 24 to drive the adapting airbag 25 to contact the surface of the oil delivery pipeline. The positioning gripper 21 and the limiting gripper 24 continue to move until the oil delivery pipeline is sealed. At this time, the pipeline at the oil source of the oil delivery pipeline will expand due to the increase in pressure, and squeeze the contact airbag 22 and the adapting airbag 25 at this location. The contact airbag 22 will then deliver gas to the contact airbag 22 away from the oil source through the drainage air pipe 23, and the adapting airbag 25 will then deliver gas to the adapting airbag 25 away from the oil source through the diversion air pipe 26. This causes the contact airbag 22 and the adapting airbag 25 away from the oil source to expand, further sealing the oil delivery pipeline.

[0040] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A wellhead hydraulic control blowout preventer, comprising a wellhead blowout preventer body (1), an adaptation mechanism (2), and an adjustment mechanism (3), characterized in that: The adaptation mechanism (2) is located on the output shaft inside the blowout preventer body (1) at the wellhead. The adjustment mechanism (3) is located on the surface of the adaptation mechanism (2). The adaptation mechanism (2) includes a positioning gripper (21), a contact airbag (22), a drainage air pipe (23), a limiting gripper (24), an adaptation airbag (25), and a diversion air pipe (26). The positioning gripper (21) is fixedly connected to the output shaft on the rear side inside the blowout preventer body (1) at the wellhead. The contact airbag (22) is fixedly connected to the front side of the positioning gripper (21). The drainage air pipe (23) connects to both sides of the contact airbag (22). The limiting gripper (24) is fixedly connected to the output shaft on the front side inside the blowout preventer body (1) at the wellhead. The adaptation airbag (25) is fixedly connected to the rear side of the limiting gripper (24). The diversion air pipe (26) connects to both sides of the adaptation airbag (25).

2. The wellhead hydraulic control blowout preventer according to claim 1, characterized in that: The adjustment mechanism (3) includes a connecting component (31) and an mounting component (32). The connecting component (31) is respectively disposed on the surface of the positioning gripper (21) and the surface of the limiting gripper (24). The mounting component (32) is disposed inside the connecting component (31).

3. The wellhead hydraulic control blowout preventer according to claim 2, characterized in that: The connecting component (31) includes connecting buckles (311), connecting slots (312), and assembly slots (313). The four connecting buckles (311) are fixedly connected to the top and bottom of the positioning gripper (21) and the limiting gripper (24), respectively. The four connecting slots (312) are respectively opened on the top and bottom of the positioning gripper (21) and the limiting gripper (24), respectively. The assembly slots (313) are respectively opened on the top of the positioning gripper (21) and the top of the limiting gripper (24).

4. A wellhead hydraulic control blowout preventer according to claim 3, characterized in that: The mounting assembly (32) includes a mounting rod (321), a connecting rod (322), and a connecting groove (323). The mounting rod (321) is snapped into the inner side of the assembly slot (313), the connecting rod (322) is fixedly connected to the bottom of the mounting rod (321), and the connecting groove (323) is formed at the top of the mounting rod (321).

5. A wellhead hydraulic control blowout preventer according to claim 1, characterized in that: The rear side of the positioning gripper (21) and the front side of the limiting gripper (24) are both fixedly connected to an auxiliary reinforcing plate (27), and the inner side of the auxiliary reinforcing plate (27) is fixedly connected to the output shaft inside the wellhead blowout preventer body (1).

6. A wellhead hydraulic control blowout preventer according to claim 1, characterized in that: Both the surface of the contact airbag (22) and the surface of the adaptation airbag (25) are provided with a buffer sleeve (28), and the surface of the buffer sleeve (28) is provided with anti-slip texture.

7. A wellhead hydraulic control blowout preventer according to claim 3, characterized in that: The bottom of the inner side of the assembly slot (313) is provided with an auxiliary positioning slot (314), and there are six auxiliary positioning slots (314) in total.

8. A wellhead hydraulic control blowout preventer according to claim 4, characterized in that: The bottom of the mounting rod (321) is fixedly connected to an auxiliary positioning rod (324). There are six auxiliary positioning rods (324) in total. The surface of the auxiliary positioning rod (324) is engaged with the inner side of the auxiliary positioning groove (314).

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