Device convenient for well cementation wellhead sealing

Abstract

The utility model relates to the technical field of well mouth sealing, and discloses a device convenient for well cementation well mouth sealing, which comprises a base, a support plate, a wrench, an arc-shaped extrusion plate II and an arc-shaped extrusion plate III, a rotating rod is rotatably connected between the base and the support plate, a gear I is fixedly connected on the rotating rod, and a rotating shaft is rotatably connected on the base. According to the well cementation wellhead sealing device, when the well cementation wellhead sealing device is used, a wrench is used for rotating the rotating rod through the groove, the first arc-shaped extrusion plate is pulled to be folded inwards, meanwhile, the first arc-shaped extrusion plate is folded to enable the tension spring to be compressed, the first arc-shaped extrusion plate is pushed to extrude the well wall under the elastic force action of the tension spring, and therefore the sealing performance of the well cementation wellhead sealing device is good; and the device is simple and convenient to mount and dismount, convenient to overhaul and maintain and very convenient to use, the working efficiency is greatly improved, the use cost and the maintenance cost are reduced, and the current use requirements can be met.

Description

Technical Field

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

[0002] Cementing, the operation of lowering casing into the well and injecting cement into the annular space between the wellbore and the casing, is an indispensable and important link in the drilling and completion process. It includes casing lowering and cement injection. Cementing technology is a multidisciplinary comprehensive application technology with the characteristics of systematic, one-time and short time.

[0003] The main purpose of cementing is to protect and support the casing in the oil and gas well, and to seal off oil, gas, water and other strata. At present, the sealing performance of the cementing wellhead sealing device is poor, and air and water leakage may occur. In addition, the installation and disassembly of the sealing devices on the market are very cumbersome, inconvenient for maintenance, and very inconvenient to use, which greatly reduces the work efficiency and increases the use cost and maintenance cost. It cannot meet the current use needs. Therefore, a device that is convenient for cementing wellhead sealing is proposed. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a device for sealing a wellhead for cementing.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a device for sealing a wellhead for cementing, comprising a base, a support plate, a wrench, an arc-shaped extrusion plate 2 and an arc-shaped extrusion plate 3, a rotating rod being rotatably connected between the base and the support plate, a gear 1 being fixedly connected to the rotating rod, a rotating shaft being rotatably connected to the base, a gear 2 being fixedly connected to the rotating shaft, the gear 1 and the gear 2 being meshingly connected, a gear 3 being fixedly connected to the rotating shaft, a rack being meshingly connected to the gear 3, the rack sliding on the base, and an arc-shaped extrusion plate 1 being fixedly connected to the rack.

[0006] As a further description of the above technical solution:

[0007] A tension spring is connected between the base and the first arc-shaped extrusion plate, and multiple groups of the rotating shaft, the second gear, the third gear, the rack and the tension spring are provided.

[0008] As a further description of the above technical solution:

[0009] A sealing plate is fixedly mounted on the support plate, and a groove matching the wrench is formed on the rotating rod.

[0010] As a further description of the above technical solution:

[0011] The second arc-shaped extrusion plate is rotatably connected with a connecting rod, and the connecting rod is fixedly connected with a threaded rod.

[0012] As a further description of the above technical solution:

[0013] A threaded block is fixedly connected to the arc-shaped extrusion plate three, and the threaded block is threadedly connected to the threaded rod.

[0014] As a further description of the above technical solution:

[0015] The second arc extrusion plate is fixedly connected with a guide rod, the third arc extrusion plate is slidably connected to the guide rod, and the guide rod is provided with two groups.

[0016] As a further description of the above technical solution:

[0017] A handle is fixedly connected to the connecting rod, a connecting plate is fixedly connected to the supporting plate, and the connecting plate slides on the guide rod.

[0018] The utility model has the following beneficial effects:

[0019] 1. In the utility model, when the cementing wellhead sealing device is used, a wrench is used to rotate the rotating rod through the groove to pull the arc-shaped extrusion plate inwardly, and at the same time, the arc-shaped extrusion plate is contracted to compress the tension spring, and the arc-shaped extrusion plate is pushed to squeeze the well wall under the elastic force of the tension spring, so that the cementing wellhead sealing device has good sealing performance and will not have air leakage, water leakage and the like. In addition, the device is simple and convenient to install and disassemble, convenient for overhaul and maintenance, and very convenient to use, which greatly improves work efficiency, reduces use cost and maintenance cost, and can meet today's use needs.

[0020] 2. In the utility model, after the sealing in the well is completed, the arc extrusion plate 2 and the arc extrusion plate 3 are placed at the wellhead, and the handle is turned, the handle drives the connecting rod to rotate, the handle drives the threaded rod to rotate, and the rotation of the threaded rod causes the threaded block to drive the arc extrusion plate 3 to move along the guide rod toward the arc extrusion plate 2, so that the sealing effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional schematic diagram of a device for sealing a wellhead for cementing proposed by the utility model;

[0022] Figure 2 This is an exploded view of the local structure of a device for sealing a wellhead for cementing proposed by the utility model;

[0023] Figure 3 A schematic diagram of the partial structure of a device for sealing a wellhead for cementing proposed by the utility model Figure 1 ;

[0024] Figure 4A schematic diagram of the partial structure of a device for sealing a wellhead for cementing proposed by the utility model Figure 2 ;

[0025] Figure 5 A schematic diagram of the partial structure of a device for sealing a wellhead for cementing proposed by the utility model Figure 3 .

[0026] Legend:

[0027] 1. Base; 2. Support plate; 3. Rotating rod; 4. Gear 1; 5. Rotating shaft; 6. Gear 2; 7. Gear 3; 8. Rack; 9. Tension spring; 10. Arc extrusion plate 1; 11. Connecting plate; 12. Sealing plate; 13. Groove; 14. Wrench; 15. Arc extrusion plate 2; 16. Arc extrusion plate 3; 17. Threaded rod; 18. Threaded block; 19. Guide rod; 20. Handle; 21. Connecting rod. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. 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.

[0029] Reference Figure 1-Figure 5 The utility model provides an embodiment: a device for sealing a wellhead for cementing, comprising a base 1, a support plate 2, a wrench 14, an arc-shaped extrusion plate 2 15, and an arc-shaped extrusion plate 3 16. A rotating rod 3 is rotatably connected between the base 1 and the support plate 2, a gear 1 4 is fixedly connected to the rotating rod 3, a rotating shaft 5 is rotatably connected to the base 1, a gear 2 6 is fixedly connected to the rotating shaft 5, the gear 1 4 and the gear 2 6 are meshingly connected, a gear 3 7 is fixedly connected to the rotating shaft 5, a rack 8 is meshingly connected to the gear 3 7, the rack 8 slides on the base 1, and an arc-shaped extrusion plate 10 is fixedly connected to the rack 8.

[0030] A tension spring 9 is connected between the base 1 and the arc extrusion plate 10, and multiple groups of rotating shaft 5, gear 2 6, gear 3 7, rack 8, and tension spring 9 are provided. A sealing plate 12 is fixedly installed on the support plate 2, and a groove 13 adapted to the wrench 14 is provided on the rotating rod 3. A connecting rod 21 is rotatably connected to the arc extrusion plate 2 15, and a threaded rod 17 is fixedly connected to the connecting rod 21. A threaded block 18 is fixedly connected to the arc extrusion plate 3 16, and the threaded block 18 is threadedly connected to the threaded rod 17. A guide rod 19 is fixedly connected to the arc extrusion plate 2 15, and the arc extrusion plate 3 16 is slidably connected to the guide rod 19. The guide rod 19 is provided with two groups. A handle 20 is fixedly connected to the connecting rod 21, and a connecting plate 11 is fixedly connected to the support plate 2, and the connecting plate 11 slides on the guide rod 19.

[0031] Working principle: when using the device for cementing wellhead sealing, use wrench 14 to rotate the rotating rod 3 through the groove 13, the rotating rod 3 drives gear 1 4, gear 1 4 drives gear 2 6 and gear 3 7 to rotate, gear 3 7 drives rack 8 to slide on the base 1, rack 8 pulls arc extrusion plate 10 inward, and at the same time, the arc extrusion plate 10 is contracted to compress the tension spring 9. At this time, put the sealing device into the well, and then loosen the wrench 14. Under the elastic force of the tension spring 9, the arc extrusion plate 10 is pushed to extrude the well wall. After the sealing in the well is completed, the arc extrusion plate 2 15 and the arc extrusion plate 3 16 are placed at the wellhead, and the handle 20 is turned. The handle 20 drives the connecting rod 21 to rotate, and the handle 20 drives the threaded rod 17 to rotate. The rotation of the threaded rod 17 causes the threaded block 18 to drive the arc extrusion plate 3 16 to move along the guide rod 19 in the direction of the arc extrusion plate 2 15, so that the sealing effect is better.

[0032] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for sealing a wellhead during cementing, comprising a base (1), a support plate (2), a wrench (14), a second arc-shaped extrusion plate (15), and a third arc-shaped extrusion plate (16), characterized in that: A rotating rod (3) is rotatably connected between the base (1) and the support plate (2); a gear 1 (4) is fixedly connected to the rotating rod (3); a rotating shaft (5) is rotatably connected to the base (1); a gear 2 (6) is fixedly connected to the rotating shaft (5); the gear 1 (4) and the gear 2 (6) are meshingly connected; a gear 3 (7) is fixedly connected to the rotating shaft (5); a rack (8) is meshingly connected to the gear 3 (7); the rack (8) slides on the base (1); and an arc-shaped extrusion plate 1 (10) is fixedly connected to the rack (8).

2. The device for facilitating cementing wellhead sealing according to claim 1, characterized in that: A tension spring (9) is connected between the base (1) and the arc-shaped extrusion plate 1 (10), and the rotating shaft (5), the gear 2 (6), the gear 3 (7), the rack (8), and the tension spring (9) are provided in multiple groups.

3. The device for facilitating cementing wellhead sealing according to claim 2, characterized in that: A sealing plate (12) is fixedly mounted on the support plate (2), and a groove (13) adapted to a wrench (14) is provided on the rotating rod (3).

4. The device for facilitating cementing wellhead sealing according to claim 3, characterized in that: The second arc-shaped extrusion plate (15) is rotatably connected to a connecting rod (21), and the connecting rod (21) is fixedly connected to a threaded rod (17).

5. The device for facilitating wellhead sealing in cementing according to claim 4, characterized in that: A threaded block (18) is fixedly connected to the arc-shaped extrusion plate three (16), and the threaded block (18) is threadedly connected to the threaded rod (17).

6. The device for facilitating wellhead sealing in cementing according to claim 5, characterized in that: The second arc-shaped extrusion plate (15) is fixedly connected with a guide rod (19), and the third arc-shaped extrusion plate (16) is slidably connected to the guide rod (19), and the guide rod (19) is provided with two groups.

7. The device for facilitating cementing wellhead sealing according to claim 6, characterized in that: A handle (20) is fixedly connected to the connecting rod (21), a connecting plate (11) is fixedly connected to the supporting plate (2), and the connecting plate (11) slides on the guide rod (19).

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