Wellhead sealing device

Abstract

The utility model relates to the technical field of well mouth sealing, in particular to a well mouth sealing device which comprises a support, a sealing ring and a sealing ring. An inserting plate is arranged at the end of the lower pressing plate, a sealing plate and a sealing ring are arranged at the bottom of the lower pressing plate, and inserting grooves are formed in the surfaces of the sealing plate and the sealing ring; the clamping plate is arranged at the bottom of the bracket; the device has the beneficial effects that a clamping plate is pushed, so that a second spring is stretched, the clamping plate is clamped on the surface of a well mouth, an inserting plate is pulled, so that the inserting plate is aligned to the position of an inserting groove, a screw is screwed, a downward pressing plate is driven to descend in the descending process of the screw, the inserting plate is inserted into the inserting groove, and the downward pressing plate downwards presses a sealing plate; when the diameter of the wellhead is large, the inserting plate is pulled out of the lower pressing plate, and the inserting plate is inserted into the inserting groove in the surface of the sealing ring in the descending process of the lower pressing plate.

Description

Technical Field

[0001] The utility model relates to the field of wellhead sealing, in particular to a wellhead sealing device. Background Art

[0002] With the accelerating process of industrialization, my country's annual demand for oil is also increasing. Oil is a non-renewable resource. Once it is mined from underground, it is difficult to regenerate. The crude oil under the surface of the earth where we live is widely distributed. Some are distributed in the land plains and are easier to mine. In the existing oil production process, it is necessary to dig and set up oil wellheads. The oil wellheads are mainly convenient for the transportation of underground oil. When the oil wellhead is not needed, the wellhead sealing device will be used;

[0003] However, existing wellhead sealing devices are all adapted to the diameter of the wellhead. When sealing different wellheads, it is necessary to replace the adapted sealing device, which makes the adaptability of the wellhead sealing device low. Utility Model Content

[0004] The purpose of the utility model is to provide a wellhead sealing device to solve the problems raised in the above background technology.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solution: a wellhead sealing device, the wellhead sealing device comprising:

[0006] A bracket, wherein a screw is screwed on the surface of the bracket;

[0007] A lower pressing plate, a plug-in plate is arranged at the end of the lower pressing plate, a sealing plate and a sealing ring are arranged at the bottom of the lower pressing plate, and plug-in grooves are opened on the surfaces of the sealing plate and the sealing ring; and

[0008] The clamping plate is arranged at the bottom of the bracket.

[0009] Preferably, a wellhead is provided at the bottom of the bracket, a clamping plate is plugged into the bottom of the bracket, the clamping plate can move at the bottom of the bracket, and a second spring is provided on the surface of the clamping plate.

[0010] Preferably, one end of the second spring is connected to the surface of the clamping plate, and the other end is connected to the surface of the bracket. The end section of the screw is T-shaped, and the end of the screw is inserted into the inside of the lower pressure plate, and the end of the screw can rotate inside the lower pressure plate.

[0011] Preferably, the plug-in board is plugged into the interior of the lower pressing plate, and the plug-in board can move inside the lower pressing plate. Limiting rods are fixed on the surfaces of the sealing plate and the sealing ring, and the limiting rods are plugged into the interior of the bracket.

[0012] Preferably, a first spring is disposed on the surface of the limiting rod, one end of the first spring is connected to the end of the limiting rod, and the other end of the first spring is connected to the surface of the bracket.

[0013] Preferably, the sealing rings are provided in multiple groups, the sealing rings are sleeved on the outside of the sealing plate, and the lower pressure plate and the plug-in plate are supported on the surfaces of the sealing plate and the sealing rings after they are lowered, and the sealing plate and the sealing rings move downward with the lower pressure plate.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model proposes to push the clamping plate so that the second spring is stretched, clamping the clamping plate on the surface of the wellhead, pulling the plug-in plate so that the plug-in plate is aligned with the position of the plug-in groove, screwing the screw rod, and driving the lower pressure plate to descend during the descending process so that the plug-in plate is plugged into the plug-in groove, and the lower pressure plate presses the sealing plate downward so that the sealing plate is plugged into the inside of the wellhead to perform valve sealing on the wellhead, and when the diameter of the wellhead is large, the plug-in plate is pulled out of the lower pressure plate, and the plug-in plate is plugged into the plug-in groove on the surface of the sealing ring as the lower pressure plate descends, so that the sealing ring and the sealing plate descend together, and the sealing ring and the sealing plate are plugged into the inside of the wellhead, and the wellhead can still be sealed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the support structure of the utility model;

[0018] Figure 3 for Figure 2 A schematic diagram of the enlarged structure in the middle.

[0019] In the figure: bracket 1, screw rod 2, wellhead 3, first spring 4, limit rod 5, clamping plate 6, second spring 7, lower pressure plate 8, plug-in plate 9, plug-in groove 10, sealing plate 11, sealing ring 12. DETAILED DESCRIPTION

[0020] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Embodiment 1

[0022] See also Figure 1-Figure 3The utility model provides a technical solution: a wellhead sealing device, which comprises: a bracket 1, a screw 2 is screwed on the surface of the bracket 1; a lower pressure plate 8, a plug-in plate 9 is arranged at the end of the lower pressure plate 8, a sealing plate 11 and a sealing ring 12 are arranged at the bottom of the lower pressure plate 8, and a plug-in groove 10 is opened on the surface of the sealing plate 11 and the sealing ring 12; and a clamping plate 6, which is arranged at the bottom of the bracket 1, pushes the clamping plate 6, so that the second spring 7 is stretched, clamps the clamping plate 6 on the surface of the wellhead 3, pulls the plug-in plate 9, and aligns the plug-in plate 9 with the position of the plug-in groove 10.

[0023] Embodiment 2

[0024] On the basis of the first embodiment, a wellhead 3 is provided at the bottom of the bracket 1 , a clamping plate 6 is inserted at the bottom of the bracket 1 , the clamping plate 6 can move at the bottom of the bracket 1 , and a second spring 7 is provided on the surface of the clamping plate 6 .

[0025] One end of the second spring 7 is connected to the surface of the clamping plate 6, and the other end is connected to the surface of the bracket 1. The end section of the screw rod 2 is T-shaped, and the end of the screw rod 2 is inserted into the lower pressure plate 8. The end of the screw rod 2 can rotate inside the lower pressure plate 8. The screw rod 2 is screwed, and the lower pressure plate 8 is driven to descend during the descending process of the screw rod 2, so that the plug-in plate 9 is plugged into the plug-in groove 10, and the lower pressure plate 8 presses down the sealing plate 11, so that the sealing plate 11 is plugged into the inside of the wellhead 3.

[0026] The plug-in board 9 is plugged into the lower pressing plate 8 , and the plug-in board 9 can move inside the lower pressing plate 8 . The surfaces of the sealing plate 11 and the sealing ring 12 are fixed with a limiting rod 5 , and the limiting rod 5 is plugged into the bracket 1 .

[0027] Embodiment 3

[0028] On the basis of the second embodiment, a first spring 4 is arranged on the surface of the limiting rod 5 , one end of the first spring 4 is connected to the end of the limiting rod 5 , and the other end of the first spring 4 is connected to the surface of the bracket 1 .

[0029] There are multiple groups of sealing rings 12, which are sleeved on the outside of the sealing plate 11. After the lower pressure plate 8 and the plug-in plate 9 are lowered, they are supported on the surfaces of the sealing plate 11 and the sealing rings 12. The sealing plate 11 and the sealing rings 12 move downward with the lower pressure plate 8. The plug-in plate 9 is inserted into the plug-in groove 10 on the surface of the sealing ring 12 during the lowering process of the lower pressure plate 8, so that the sealing ring 12 and the sealing plate 11 are lowered together, and the sealing ring 12 and the sealing plate 11 are plugged into the inside of the wellhead 3.

[0030] During actual use, the clamping plate 6 is pushed so that the second spring 7 is stretched, and the clamping plate 6 is clamped on the surface of the wellhead 3, and the plug-in plate 9 is pulled so that the plug-in plate 9 is aligned with the position of the plug-in groove 10, and the screw rod 2 is screwed. During the descent of the screw rod 2, the lower pressure plate 8 is driven to descend, so that the plug-in plate 9 is plugged into the plug-in groove 10, and the lower pressure plate 8 presses down the sealing plate 11, so that the sealing plate 11 is plugged into the inside of the wellhead 3 to perform valve sealing on the wellhead 3, and when the diameter of the wellhead 3 is large, the plug-in plate 9 is pulled out of the lower pressure plate 8, and the plug-in plate 9 is plugged into the plug-in groove 10 on the surface of the sealing ring 12 as the lower pressure plate 8 descends, so that the sealing ring 12 and the sealing plate 11 descend together, and the sealing ring 12 and the sealing plate 11 are plugged into the inside of the wellhead 3, and the wellhead 3 can still be sealed.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wellhead sealing device, characterized in that: The wellhead sealing device comprises: A support (1), wherein a screw rod (2) is screwed onto a surface of the support (1); A lower pressing plate (8), a plug-in plate (9) is arranged at the end of the lower pressing plate (8), a sealing plate (11) and a sealing ring (12) are arranged at the bottom of the lower pressing plate (8), and plug-in grooves (10) are provided on the surfaces of the sealing plate (11) and the sealing ring (12); and The clamping plate (6) is arranged at the bottom of the bracket (1).

2. A wellhead sealing device according to claim 1, characterized in that: A wellhead (3) is arranged at the bottom of the bracket (1), a clamping plate (6) is inserted into the bottom of the bracket (1), the clamping plate (6) is movable at the bottom of the bracket (1), and a second spring (7) is arranged on the surface of the clamping plate (6).

3. A wellhead sealing device according to claim 2, characterized in that: One end of the second spring (7) is connected to the surface of the clamping plate (6), and the other end is connected to the surface of the bracket (1). The end section of the screw rod (2) is T-shaped. The end of the screw rod (2) is inserted into the interior of the lower pressure plate (8), and the end of the screw rod (2) can rotate inside the lower pressure plate (8).

4. A wellhead sealing device according to claim 3, characterized in that: The plug-in board (9) is plugged into the interior of the lower pressing plate (8), and the plug-in board (9) can move inside the lower pressing plate (8). A limiting rod (5) is fixed on the surface of the sealing plate (11) and the sealing ring (12), and the limiting rod (5) is plugged into the interior of the bracket (1).

5. A wellhead sealing device according to claim 4, characterized in that: A first spring (4) is arranged on the surface of the limiting rod (5); one end of the first spring (4) is connected to the end of the limiting rod (5), and the other end is connected to the surface of the bracket (1).

6. A wellhead sealing device according to claim 5, characterized in that: The sealing rings (12) are provided in multiple groups. The sealing rings (12) are sleeved on the outside of the sealing plate (11). After the lower pressing plate (8) and the plug-in plate (9) are lowered, they are supported on the surfaces of the sealing plate (11) and the sealing rings (12). The sealing plate (11) and the sealing rings (12) move downward along with the lower pressing plate (8).

Images