Plugging device for oil and gas production wellhead

Abstract

The utility model discloses a plugging device for an oil and gas production well mouth, which belongs to the technical field of oil and gas production well mouths and comprises a support frame, a clamping groove is arranged on the support frame, a placing table is arranged on one side of an inner cavity of the clamping groove, a movable support mechanism is arranged at the top of the support frame, a plugging mechanism is arranged on the movable support mechanism, and the plugging mechanism is arranged on the placing table. A plurality of self-locking trundles are fixedly installed on the bottom face of the supporting frame. According to the plugging device, the self-locking trundles are used for driving the supporting frame to move, the plugging device can be moved, the plugging device is moved to the side portion of the gas production wellhead only when the gas production wellhead needs to be plugged, it is guaranteed that the plugging device is convenient to use and practical, meanwhile, the plugging device is prevented from being affected by dirt splashed out of the gas production wellhead, and the plugging device is safe and reliable. And through cooperation of a screw rod, a supporting disc, a screw and a rotating disc, the moved supporting frame can be fixed, and practicability is good.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas production wellheads, and more specifically to a plugging device for oil and gas production wellheads. Background Art

[0002] An oil well or a gas well is a hole drilled by drilling methods. When an oil well or a gas well is constructed, a wellhead will be left on the ground. During the process of resource exploitation, the wellhead needs to be sealed according to demand.

[0003] After searching, the utility model patent with announcement number CN219387839U discloses a sealing device for oil and gas wellhead, which comprises a ground, an outer surface of one side of the ground is provided with a well body, the top surface of the ground is fixedly connected with a base, the top surface of the base is fixedly connected with two slide grooves, and the inner surfaces of the two slide grooves are provided with a control mechanism for sliding in a horizontal direction, a plurality of steel wire ropes are fixedly provided with a bottom surface of the control mechanism, and a sealing block is fixedly connected with one end of the plurality of steel wire ropes away from the control mechanism, two limit seats are fixedly provided with a rubber pad between the opposite surfaces of the two limit seats, and the bottom surface of the rubber pad is fixedly connected with the top surface of the ground, and the rubber pad is adapted to the sealing block, which solves the problem of low safety caused by the need for manual handling during the sealing of the existing oil and gas wellheads.

[0004] However, the above patent has the following shortcomings: the device is fixed on the ground and located at the side of the wellhead, which may affect the operation when oil and gas are produced. At the same time, there will be certain dirt on the side of the wellhead during oil and gas production, which will affect the plugging device itself; and it is not easy to ensure that the plugging block and the wellhead are tightly connected after the plugging block is placed at the wellhead, and the quality of plugging is poor. For this reason, we propose a plugging device for oil and gas wellheads. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide a plugging device for oil and gas production wellheads.

[0006] In order to solve the above problems, the utility model adopts the following technical solutions:

[0007] A plugging device for an oil and gas wellhead comprises a support frame, a card slot is provided on the support frame, a placing platform is provided on one side of the inner cavity of the card slot, a movable support mechanism is provided on the top of the support frame, a plugging mechanism is provided on the movable support mechanism, a plurality of self-locking casters are fixedly mounted on the bottom surface of the support frame, a plurality of receiving slots are provided on the bottom surface of the support frame, a plurality of screws are threadedly sleeved on the top of the support frame, the bottom ends of the screws extend to the inner cavity of the receiving slots and are fixedly connected to a support plate, a screw is fixedly connected to the bottom surface of the support plate, and a turntable is fixedly connected to the top end of the screw.

[0008] As a preferred solution of the utility model, the mobile support mechanism includes two groups of support seat groups fixedly connected to the top surface of the support frame, the two groups of support seat groups are respectively rotatably connected with screw rods, the outer sides of the two screw rods are respectively threadedly sleeved with moving seats, and multiple electric push rods are fixedly installed on the two moving seats, and the top ends of the multiple electric push rods are fixedly connected with lifting plates, and servo motors are fixedly installed on the outer sides of the two groups of support seat groups, and the output shaft of the servo motor is connected to the end of the screw rod.

[0009] As a preferred solution of the utility model, the blocking mechanism includes a plurality of suspension rods fixedly connected to the bottom surface of the lifting plate, the bottom ends of the plurality of suspension rods are fixedly connected to a cover, the top of the inner cavity of the cover is fixedly connected to a sealing gasket, the inner wall of the cover is fixedly connected to a sealing airbag, the side of the cover is fixedly installed with an electric control valve, the end of the electric control valve extends to the inner cavity of the sealing airbag, the top surface of the cover is fixedly installed with an inflation pump, the output end of the inflation pump is fixedly connected to an inflation tube, the end of the inflation tube is fixedly sleeved to the inner cavity of the sealing airbag, and a one-way valve is provided in the middle of the inflation tube.

[0010] As a preferred solution of the utility model, a push handle is fixedly connected to the top surface of the support frame, and a controller is fixedly installed on the push handle.

[0011] As a preferred solution of the utility model, a battery is arranged on the top of the support frame.

[0012] As a preferred solution of the utility model, the top surface of the support frame and the bottom surface of the movable seat are in contact with each other.

[0013] Compared with the prior art, the advantages of the present invention are:

[0014] (1) In the utility model, the support frame is driven to move by self-locking casters, so that the plugging device can be moved. When the gas wellhead needs to be plugged, the plugging device is moved to the side of the gas wellhead, ensuring that the plugging device is convenient and practical. At the same time, the plugging device is prevented from being affected by dirt splashed from the gas wellhead. The support frame can be fixed after moving by the cooperation of the screw, the support plate, the screw and the turntable, thereby improving the practicality of the plugging device.

[0015] (2) In the utility model, a movable support mechanism is used to drive the cover to move horizontally, and an electric push rod is used to adjust the height of the cover, so that the sealing gasket in the inner cavity of the cover and the top of the gas wellhead are abutted against each other, thereby sealing the gas wellhead. In addition, an air pump is introduced into the sealing airbag through an air filling pipe and a one-way valve, so that the sealing airbag expands and squeezes the side of the gas wellhead, thereby ensuring the sealing between the inner wall of the cover and the side of the gas wellhead, thereby improving the working quality of the sealing device for oil and gas wellheads. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0018] Figure 3 It is a structural schematic diagram of the screw rod of the utility model;

[0019] Figure 4 It is a cross-sectional schematic diagram of the sealing cover of the utility model.

[0020] Description of the numbers in the figure:

[0021] 1. Support frame; 2. Self-locking casters; 3. Storage slot; 4. Screw; 5. Support plate; 6. Screw; 7. Turntable; 8. Mobile support mechanism; 9. Blocking mechanism; 10. Slot; 11. Placement table; 12. Support seat assembly; 13. Screw; 14. Moving seat; 15. Servo motor; 16. Electric push rod; 17. Lifting plate; 18. Suspension rod; 19. Cover; 20. Sealing pad; 21. Sealing airbag; 22. Air pump; 23. Air tube; 24. One-way valve; 25. Electric control valve; 26. Push handle; 27. Controller; 28. Battery. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in 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.

[0023] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] Example:

[0026] See also Figure 1-4 A plugging device for an oil and gas wellhead comprises a support frame 1, a card slot 10 is provided on the support frame 1, a placing table 11 is provided on one side of the inner cavity of the card slot 10, a mobile support mechanism 8 is provided on the top of the support frame 1, a plugging mechanism 9 is provided on the mobile support mechanism 8, a plurality of self-locking casters 2 are fixedly installed on the bottom surface of the support frame 1, a plurality of receiving grooves 3 are provided on the bottom surface of the support frame 1, a plurality of screws 4 are threadedly sleeved on the top of the support frame 1, the bottom end of the screw 4 extends to the inner cavity of the receiving groove 3 and is fixedly connected to a support plate 5, a screw 6 is fixedly connected to the bottom surface of the support plate 5, and a turntable 7 is fixedly connected to the top of the screw 4.

[0027] For details, please refer to Figure 1The mobile support mechanism 8 includes two groups of support seat groups 12 fixedly connected to the top surface of the support frame 1, and the two groups of support seat groups 12 are respectively rotatably connected with screw rods 13, and the outer sides of the two screw rods 13 are respectively threadedly sleeved with moving seats 14, and multiple electric push rods 16 are fixedly installed on the two moving seats 14, and the top ends of the multiple electric push rods 16 are fixedly connected with lifting plates 17, and servo motors 15 are fixedly installed on the outer sides of the two groups of support seat groups 12, and the output shaft of the servo motor 15 is connected to the end of the screw rod 13.

[0028] In this embodiment, the cooperation between the screw rod 13 and the moving seat 14 is utilized to drive the electric push rod 16, the lifting plate 17 and the blocking mechanism 9 to move horizontally.

[0029] For details, please refer to Figure 1 and Figure 4 The blocking mechanism 9 includes a plurality of suspension rods 18 fixedly connected to the bottom surface of the lifting plate 17, the bottom ends of the plurality of suspension rods 18 are fixedly connected with a cover 19, the top of the inner cavity of the cover 19 is fixedly connected with a sealing gasket 20, the inner wall of the cover 19 is fixedly connected with a sealing airbag 21, the side of the cover 19 is fixedly installed with an electric control valve 25, the end of the electric control valve 25 extends to the inner cavity of the sealing airbag 21, the top surface of the cover 19 is fixedly installed with an inflation pump 22, the output end of the inflation pump 22 is fixedly connected with an inflation tube 23, the end of the inflation tube 23 is fixedly sleeved to the inner cavity of the sealing airbag 21, and a one-way valve 24 is arranged in the middle of the inflation tube 23.

[0030] In this embodiment, a one-way valve 24 is used to ensure that the inflation pump 22 and the inflation tube 23 can only inflate air into the sealed airbag 21 , and the electric control valve 25 is used to discharge the gas in the sealed airbag 21 .

[0031] For details, please refer to Figure 1 A push handle 26 is fixedly connected to the top surface of the support frame 1 , and a controller 27 is fixedly mounted on the push handle 26 .

[0032] In this embodiment, the push handle 26 is used to push the device, and the controller 27 is used to control the servo motor 15, the electric push rod 16, the air pump 22 and the electric control valve 25.

[0033] For details, please refer to Figure 1 A battery 28 is arranged on the top of the support frame 1.

[0034] In this embodiment, the battery 28 is used to supply power to the servo motor 15 , the electric push rod 16 , the controller 27 , the air pump 22 and the electric control valve 25 .

[0035] For details, please refer to Figure 1 , the top surface of the support frame 1 and the bottom surface of the movable seat 14 are in contact with each other.

[0036] In this embodiment, the top surface of the support frame 1 is used to limit the movable seat 14 , so that the movable seat 14 can only move along the axial direction of the screw rod 13 .

[0037] Working principle: When it is necessary to seal the gas wellhead, first hold the push handle 26 to push the device, use the self-locking caster 2 to drive the support frame 1 to move, so that the gas wellhead moves to the inside of the slot 10, then turn the turntable 7 to drive the screw 4 to rotate, and use the cooperation between the screw 4 and the support frame 1 to drive the support plate 5 and the screw 6 to move down, so that the screw 6 is inserted into the ground to fix the support frame 1, and then start the electric push rod 16 to drive the lifting plate 17, the suspension rod 18 and the cover 19 to move up, and start the servo motor 15 to drive the screw 13 to rotate, and use the screw 13 and the moving seat 14 to move the lifting plate 17, the suspension rod 18 and the cover 19 to move up. The cooperation between them drives the movable seat 14, the electric push rod 16, the lifting plate 17 and the cover 19 to move horizontally, so that the cover 19 moves to the top of the gas wellhead, and then the electric push rod 16 is started to drive the cover 19 to move downward, so that the sealing gasket 20 in the inner cavity of the cover 19 is against the top of the gas wellhead, so as to seal the gas wellhead, and finally the inflation pump 22 is started to introduce it into the sealing airbag 21 through the inflation pipe 23 and the one-way valve 24, so that the sealing airbag 21 expands and squeezes the side of the gas wellhead, thereby ensuring the sealing between the inner wall of the cover 19 and the side of the gas wellhead.

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the present invention according to the technical solution and improved concept of the present invention, which should be included in the protection scope of the present invention.

Claims

1. A plugging device for oil and gas wellhead, characterized in that: The invention comprises a support frame (1), wherein a card slot (10) is provided on the support frame (1), a placing table (11) is provided on one side of the inner cavity of the card slot (10), a movable support mechanism (8) is provided on the top of the support frame (1), a blocking mechanism (9) is provided on the movable support mechanism (8), a plurality of self-locking casters (2) are fixedly mounted on the bottom surface of the support frame (1), a plurality of storage grooves (3) are provided on the bottom surface of the support frame (1), a plurality of screw rods (4) are threadedly sleeved on the top of the support frame (1), the bottom ends of the screw rods (4) extend to the inner cavity of the storage grooves (3) and are fixedly connected to a support plate (5), the bottom surface of the support plate (5) is fixedly connected to a screw (6), and the top ends of the screw rods (4) are fixedly connected to a rotating disk (7).

2. The plugging device for oil and gas wellhead according to claim 1, characterized in that: The mobile support mechanism (8) comprises two groups of support seat groups (12) fixedly connected to the top surface of the support frame (1), the two groups of support seat groups (12) are respectively rotatably connected with screw rods (13), the outer sides of the two screw rods (13) are respectively threadedly sleeved with mobile seats (14), a plurality of electric push rods (16) are fixedly mounted on the two mobile seats (14), the top ends of the plurality of electric push rods (16) are fixedly connected with lifting plates (17), and servo motors (15) are fixedly mounted on the outer sides of the two groups of support seat groups (12), and the output shaft of the servo motor (15) is connected to the end of the screw rod (13).

3. The plugging device for oil and gas wellhead according to claim 2, characterized in that: The blocking mechanism (9) comprises a plurality of suspension rods (18) fixedly connected to the bottom surface of the lifting plate (17), the bottom ends of the plurality of suspension rods (18) are fixedly connected to a sealing cover (19), the top of the inner cavity of the sealing cover (19) is fixedly connected to a sealing gasket (20), the inner wall of the sealing cover (19) is fixedly connected to a sealing airbag (21), the side of the sealing cover (19) is fixedly mounted with an electric control valve (25), the end of the electric control valve (25) extends to the inner cavity of the sealing airbag (21), the top surface of the sealing cover (19) is fixedly mounted with an inflation pump (22), the output end of the inflation pump (22) is fixedly connected to an inflation tube (23), the end of the inflation tube (23) is fixedly sleeved to the inner cavity of the sealing airbag (21), and a one-way valve (24) is provided in the middle of the inflation tube (23).

4. The plugging device for oil and gas wellhead according to claim 1, characterized in that: A push handle (26) is fixedly connected to the top surface of the support frame (1), and a controller (27) is fixedly mounted on the push handle (26).

5. The plugging device for oil and gas wellhead according to claim 1, characterized in that: A storage battery (28) is arranged on the top of the support frame (1).

6. The plugging device for oil and gas wellhead according to claim 2, characterized in that: The top surface of the support frame (1) and the bottom surface of the movable seat (14) are in contact with each other.

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