A single ram preventer with slip-on clamp

Abstract

The utility model relates to the technical field of oil drilling and mining, and disclose a slip clamping type single-gate blowout preventer, including blowout preventer main part, the left and right ends of blowout preventer main part all are provided with hydraulic drive cylinder. The slip clamping type single-gate blowout preventer, through the installation of limiting component and sealing assembly, when using, through the hydraulic drive cylinder drive fixed plate of both sides to the well mouth center and moves, to make slip clamping pipe column, drive gate clamp pipe column simultaneously, to realize sealing through compression sealing rubber core, when there is pressure in well, well pressure pushes the gate front sealing further extrusion deformation from the rear of gate and promotes sealing effect, through the linkage design of compression spring built-in in arc limiting plate and slip, realize pipe column radial self -adaptation clamping, eliminate sealing gap, prevent because pipe column peristalsis and influence sealing effect, avoid the leakage problem of traditional blowout preventer because of static sealing, improved the practicality of slip clamping type single-gate blowout preventer.

Description

Technical Field

[0001] This utility model relates to the field of oil drilling and production technology, and in particular to a slip-clamping single-gate blowout preventer. Background Technology

[0002] During oil and gas well development, the removal of sucker rods often results in well kicks, sucker rod ejection causing injuries, and even blowouts. To ensure the safety of personnel and equipment, well control devices are required, including wellheads, well control manifolds, and blowout preventers (BOPs) within the drill string. These devices include BOPs, four-way connectors, casing heads, and transition flanges. BOPs are used to close the wellhead during well testing, workover, and completion operations to prevent blowouts. They combine full and partial sealing functions into one device, featuring simple structure, ease of operation, and high pressure resistance. They are commonly used safety sealing devices in oilfields to prevent blowouts during oil well operations and workovers.

[0003] Traditional single-gate blowout preventers rely on the static compression of the gate front seal and top seal to achieve wellhead sealing. However, under high pressure, deep well, or large-size tubing conditions, the seal is prone to failure due to tubing creep, reducing its effectiveness.

[0004] Therefore, we propose a single-gate blowout preventer with a slip clamping mechanism. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a single-gate blowout preventer with a clamping mechanism.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A single-gate blowout preventer with a clamping mechanism is disclosed. The blowout preventer includes a main body, with hydraulic drive cylinders provided at both the left and right ends of the main body. A fixing plate is provided at the drive end of each of the two hydraulic drive cylinders. A limit component is provided at one end of each of the two fixing plates opposite to each other. A sealing component is provided above the limit component.

[0008] As a further embodiment of this utility model: the limiting component includes an arc-shaped limiting plate, and an arc-shaped limiting plate is fixedly provided at one end of each of the fixed plates. A plurality of compression springs are evenly provided on the arc-shaped surface of the arc-shaped limiting plate. A clamp is provided at the end of the compression spring away from the arc-shaped limiting plate. The clamp has an arc-shaped structure. Through the linkage design of the compression spring built into the arc-shaped limiting plate and the clamp, the radial adaptive clamping of the pipe column is realized.

[0009] As a further improvement of this utility model: the sealing assembly includes two gates, and a gate is fixedly installed above the arc-shaped limiting plate. A sealing core is fixedly installed on the arc-shaped surface of each of the two gates. The gate can be driven by a hydraulic cylinder to move towards the center of the wellhead to clamp the tubing string, thereby achieving a seal by compressing the sealing core.

[0010] As a further improvement of this utility model: an upper flange pipe is provided at the upper end of the blowout preventer body, and a lower flange pipe is provided at the lower end of the blowout preventer body.

[0011] As a further improvement of this utility model: both the upper flange pipe and the lower flange pipe have a plurality of connecting holes on their end faces, and the connecting holes are arranged in a ring array.

[0012] As a further improvement of this invention: two pressure sensors are installed inside the blowout preventer body, and the two pressure sensors are located below the slip. The pressure sensors can detect the pressure inside the blowout preventer body.

[0013] As a further improvement of this utility model: an alarm is provided at the outer end of the blowout preventer body. The alarm is connected to a pressure sensor signal. An emergency pressure relief valve is provided on one side of the alarm. When the pressure exceeds the safe range, the alarm sounds an alarm, and the emergency pressure relief valve is activated to release pressure, thereby keeping the pressure within the safe range and preventing accidents from happening.

[0014] Compared with the prior art, this utility model provides a single-gate blowout preventer with a clamping mechanism, which has the following advantages:

[0015] 1. This utility model, through the installation of limiting components and sealing components, uses hydraulic drive cylinders on both sides to drive the fixed plate to move towards the center of the wellhead during use, thereby causing the slips to clamp the tubing string. At the same time, it drives the gate plate to clamp the tubing string, thereby achieving a seal by compressing the sealing core. When there is pressure in the well, the well pressure pushes the front seal of the gate plate from the rear of the gate plate to further compress and deform, improving the sealing effect. Through the linkage design of the compression spring built into the arc-shaped limiting plate and the slips, the radial self-adaptive clamping of the tubing string is achieved, eliminating sealing gaps and preventing the sealing effect from being affected by tubing string creep. This avoids the leakage problem caused by static sealing in traditional blowout preventers, and improves the practicality of the slip-clamping single-gate blowout preventer.

[0016] 2. This utility model, by installing a pressure sensor, enables the pressure inside the blowout preventer body to be detected during use. When the pressure exceeds the safe range, the alarm sounds and the emergency pressure relief valve is activated to release pressure, thereby keeping the pressure within the safe range and preventing accidents, thus improving the safety of the clamp-on single-gate blowout preventer.

[0017] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model has a simple structure and is easy to operate. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a single-gate blowout preventer with a clamping mechanism proposed in this utility model.

[0019] Figure 2 This is a cross-sectional structural diagram of a single-gate blowout preventer with a clamping mechanism proposed in this utility model;

[0020] Figure 3 This is a schematic diagram of the limiting component and sealing component of a clamping single-gate blowout preventer proposed in this utility model;

[0021] Figure 4 This is a schematic diagram of the clamping structure of a clamping single-gate blowout preventer proposed in this utility model;

[0022] Figure 5 This is an enlarged structural diagram of point A of a single-gate blowout preventer with a clamping mechanism proposed in this utility model.

[0023] In the diagram: 1. Blowout preventer body; 2. Hydraulic drive cylinder; 3. Fixing plate; 4. Arc-shaped limit plate; 5. Compression spring; 6. Slipper; 7. Gate; 8. Sealing core; 9. Upper flange pipe; 10. Lower flange pipe; 11. Connection hole; 12. Pressure sensor; 13. Alarm; 14. Emergency pressure relief valve. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Example: Please refer to Figures 1-5 This utility model provides a technical solution:

[0027] A single-gate blowout preventer with a clamping mechanism includes a blowout preventer body 1. Hydraulic drive cylinders 2 are provided at both the left and right ends of the blowout preventer body 1. Fixing plates 3 are provided at the driving ends of the two hydraulic drive cylinders 2. Limiting components are provided at the opposite ends of the two fixing plates 3. A sealing component is provided above the limiting components.

[0028] In this embodiment, the preferred limiting component includes an arc-shaped limiting plate 4. An arc-shaped limiting plate 4 is fixedly provided at one end of each of the fixed plates 3. A plurality of compression springs 5 ​​are evenly provided on the arc-shaped surface of the arc-shaped limiting plate 4. A slip 6 is provided at the end of the compression spring 5 away from the arc-shaped limiting plate 4. The slip 6 has an arc-shaped structure. Through the linkage design of the compression spring 5 built into the arc-shaped limiting plate 4 and the slip 6, the radial adaptive clamping of the column is realized.

[0029] In this embodiment, the preferred sealing assembly includes two gates 7. A gate 7 is fixedly disposed above the arc-shaped limiting plate 4. A sealing core 8 is fixedly disposed on the arc-shaped surface of each of the two gates 7. The gates 7 can be driven by the hydraulic drive cylinder 2 to move towards the center of the wellhead to clamp the tubing string, thereby achieving sealing by compressing the sealing core 8.

[0030] In this embodiment, preferably, the upper end of the blowout preventer body 1 is provided with an upper flange pipe 9, and the lower end of the blowout preventer body 1 is provided with a lower flange pipe 10.

[0031] In this embodiment, preferably, both the upper flange tube 9 and the lower flange tube 10 have a plurality of connecting holes 11 on their end faces, and the connecting holes 11 are arranged in a ring array.

[0032] In this embodiment, preferably, two pressure sensors 12 are installed inside the blowout preventer body 1. The two pressure sensors 12 are located below the slip 6. The pressure inside the blowout preventer body 1 can be detected by the installation of the pressure sensors 12.

[0033] Working Principle: In this embodiment, a single-gate blowout preventer with slip clamping is used by hydraulic cylinders 2 on both sides to drive the fixed plate 3 to move towards the center of the wellhead, thereby clamping the tubing string with slips 6. At the same time, the gate 7 is driven to clamp the tubing string, thereby achieving a seal by compressing the sealing core 8. When there is pressure in the well, the well pressure pushes the sealing core 8 from the rear of the gate 7 to further compress and deform it, improving the sealing effect. Through the linkage design of the compression spring 5 built into the arc-shaped limit plate 4 and the slips 6, the tubing string is radially adaptively clamped, eliminating sealing gaps and preventing the sealing effect from being affected by tubing string creep. During the use of the blowout preventer, the pressure sensor 12 can detect the pressure inside the blowout preventer body 1. When the pressure exceeds the safe range, the alarm 13 sounds an alarm, and the emergency pressure relief valve 14 is activated to release pressure, thereby keeping the pressure within the safe range and preventing accidents.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A single-gate blowout preventer with a clamping mechanism, comprising a blowout preventer body (1), characterized in that: Hydraulic drive cylinders (2) are provided at both the left and right ends of the blowout preventer body (1). Fixed plates (3) are provided at the driving ends of the two hydraulic drive cylinders (2). Limiting components are provided at the opposite ends of the two fixed plates (3). A sealing component is provided above the limiting components.

2. The single-gate blowout preventer with clamping mechanism according to claim 1, characterized in that: The limiting component includes an arc-shaped limiting plate (4). An arc-shaped limiting plate (4) is fixedly provided on one end of the fixed plate (3). A plurality of compression springs (5) are evenly provided on the arc-shaped surface of the arc-shaped limiting plate (4). A clip (6) is provided on the end of the compression spring (5) away from the arc-shaped limiting plate (4). The clip (6) has an arc-shaped structure.

3. The single-gate blowout preventer with clamping mechanism according to claim 2, characterized in that: The sealing assembly includes two gates (7), with a gate (7) fixedly disposed above the arc-shaped limiting plate (4), and a sealing core (8) fixedly disposed on the arc-shaped surface of each of the two gates (7).

4. The single-gate blowout preventer with clamping mechanism according to claim 1, characterized in that: The upper end of the blowout preventer body (1) is provided with an upper flange pipe (9), and the lower end of the blowout preventer body (1) is provided with a lower flange pipe (10).

5. A single-gate blowout preventer with a clamping mechanism according to claim 4, characterized in that: The end faces of the upper flange (9) and the lower flange (10) are provided with a number of connection holes (11), which are arranged in a ring array.

6. The single-gate blowout preventer with clamping mechanism according to claim 1, characterized in that: The blowout preventer body (1) is equipped with two pressure sensors (12) inside, and the two pressure sensors (12) are located below the valve (6).

7. A single-gate blowout preventer with a clamping mechanism according to claim 6, characterized in that: An alarm (13) is provided at the outer end of the blowout preventer body (1). The alarm (13) is connected to the pressure sensor (12) and an emergency pressure relief valve (14) is provided on one side of the alarm (13).

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