Combined sealing rubber core for annular blowout preventer

Abstract

The utility model relates to annular preventer technical field, specifically disclose a combination type annular preventer sealing rubber core, including the upper rubber core subassembly, the bottom surface connection of upper rubber core subassembly has the sealing strip, the upper surface of upper rubber core subassembly is equipped with two groups of through -hole, the top of upper rubber core subassembly is equipped with two groups of locking assembly, the below of upper rubber core subassembly is equipped with lower rubber core subassembly, the upper surface of lower rubber core subassembly is inlayed with two groups of thread cylinder, the upper surface of lower rubber core subassembly is equipped with sealing recess. Through the adaptability of sealing strip and sealing recess, it is convenient to primarily enhance the sealing between upper rubber core subassembly and lower rubber core subassembly, prevent fluid from the leakage of both junctions, utilize the upper support ring to provide structural support for the upper rubber sealing body, through the lower support ring to provide structural support for the lower rubber sealing body, and further ensure that when bearing pressure, the upper rubber sealing body and the lower rubber sealing body can keep stable form.

Description

Technical Field

[0001] This utility model relates to the field of annular blowout preventers, and specifically discloses a combined annular blowout preventer sealing core. Background Technology

[0002] Annular blowout preventers (BOPs) are important wellhead control devices in oil drilling and well workover operations. They are mainly used to seal the annular space at the wellhead during drilling to prevent high-pressure fluids (oil, gas, drilling fluid, etc.) from being ejected from the well. They are one of the core devices for ensuring drilling safety and preventing blowout accidents. As the core component of the annular BOP, the sealing performance and service life of the sealing core directly affect the overall performance and operational safety of the BOP.

[0003] Currently, there are many problems with the sealing core of annular blowout preventer in practical applications. When the drill string deviates or drill strings of different sizes are used alternately, conventional sealing cores are difficult to achieve a good sealing effect, which can easily lead to wellhead leakage and safety hazards. Moreover, the combination stability is poor and it is not conducive to current use. Therefore, we propose a combined annular blowout preventer sealing core to solve the above problems. Utility Model Content

[0004] This utility model proposes a combined annular blowout preventer sealing core, which solves the problems of poor sealing effect and safety hazards through an upper core assembly, a lower core assembly, and a locking assembly.

[0005] This utility model is implemented as follows: a combined annular blowout preventer sealing core includes an upper core assembly, a sealing strip connected to the bottom surface of the upper core assembly, two sets of through holes on the upper surface of the upper core assembly, two sets of locking components above the upper core assembly, a lower core assembly below the upper core assembly, two sets of threaded cylinders embedded in the upper surface of the lower core assembly, and a sealing groove on the upper surface of the lower core assembly.

[0006] As a preferred embodiment of the combined annular blowout preventer sealing core of this utility model, the upper core assembly includes an upper support ring and an upper rubber sealing body, wherein the bottom surface of the upper support ring is connected to the upper surface of the upper rubber sealing body.

[0007] As a preferred embodiment of the combined annular blowout preventer sealing core of this utility model, the lower core assembly includes a lower support ring and a lower rubber sealing body, wherein the upper surface of the lower support ring is connected to the bottom surface of the lower rubber sealing body.

[0008] As a preferred embodiment of the combined annular blowout preventer sealing core of this utility model, each of the locking components includes a screw, and the top of each screw is provided with a hexagonal groove.

[0009] As a preferred embodiment of the combined annular blowout preventer sealing core of this utility model, the sealing groove is adapted to the sealing strip.

[0010] As a preferred embodiment of the combined annular blowout preventer sealing core of this utility model, each threaded cylinder is adapted to the screw.

[0011] The beneficial effects of this utility model are:

[0012] This combined annular blowout preventer sealing core, through a screw in the locking assembly, passes through the through hole of the upper core assembly and engages with the threaded cylinder on the lower core assembly. The hexagonal groove and external tool facilitate the rotation of the screw and ensure a tight fit between the upper and lower core assemblies, achieving the desired assembly. The compatibility of the sealing strip and sealing groove enhances the initial seal between the upper and lower core assemblies, preventing fluid leakage at their connection. The upper support ring and lower support ring provide structural support for both the upper and lower rubber seals, ensuring stable shape under pressure. Attached Figure Description

[0013] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0014] Figure 1 This is a three-dimensional structural diagram of the sealing core of a combined annular blowout preventer according to this utility model.

[0015] Figure 2 This is a frontal cross-sectional view of the sealing core assembly of a combined annular blowout preventer according to this utility model.

[0016] Figure 3 This is a frontal cross-sectional view of the lower rubber core assembly of a combined annular blowout preventer according to the present invention.

[0017] Figure 4 This is a frontal three-dimensional structural diagram of a combined annular blowout preventer sealing core locking assembly according to the present invention.

[0018] The markings in the diagram are: 1. Locking assembly; 101. Screw; 102. Hexagonal groove; 2. Upper rubber core assembly; 3. Through hole; 4. Threaded cylinder; 5. Lower rubber core assembly; 6. Upper support ring; 7. Lower rubber seal; 8. Upper rubber seal; 9. Sealing strip; 10. Lower support ring; 11. Sealing groove. Detailed Implementation

[0019] 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 scope of protection of the present utility model. Unless otherwise specified, the methods used in the present utility model are conventional methods; unless otherwise specified, the raw materials and apparatus used are conventional commercially available products.

[0020] Please see Figure 1-4 A combined annular blowout preventer sealing core includes an upper core assembly 2, with a sealing strip 9 connected to the bottom surface of the upper core assembly 2, two sets of through holes 3 on the upper surface of the upper core assembly 2, two sets of locking components 1 above the upper core assembly 2, and a lower core assembly 5 below the upper core assembly 2. Two sets of threaded cylinders 4 are embedded in the upper surface of the lower core assembly 5, and a sealing groove 11 is formed on the upper surface of the lower core assembly 5.

[0021] In this embodiment: the compatibility between the sealing strip 9 and the sealing groove 11 facilitates the initial enhancement of the sealing performance between the upper glue core assembly 2 and the lower glue core assembly 5, preventing fluid leakage from the connection between the two.

[0022] As a technical optimization of this utility model, the upper rubber core assembly 2 includes an upper support ring 6 and an upper rubber sealing body 8, with the bottom surface of the upper support ring 6 connected to the upper surface of the upper rubber sealing body 8. The lower rubber core assembly 5 includes a lower support ring 10 and a lower rubber sealing body 7, with the upper surface of the lower support ring 10 connected to the bottom surface of the lower rubber sealing body 7.

[0023] In this embodiment: the upper support ring 6 provides structural support for the upper rubber seal 8, and the lower support ring 10 provides structural support for the lower rubber seal 7, thereby ensuring that the upper rubber seal 8 and the lower rubber seal 7 can maintain a stable shape when subjected to pressure.

[0024] As a technical optimization of this utility model, each locking component 1 includes a screw 101, and each screw 101 has a hexagonal groove 102 at its top end. The sealing groove 11 is adapted to the sealing strip 9, and each threaded cylinder 4 is adapted to the screw 101.

[0025] In this embodiment: the hexagonal groove 102 and the external tool are used to facilitate the rotation of the screw 101, and the screw 101 and the threaded cylinder 4 are used to facilitate the tight fit between the upper glue core assembly 2 and the lower glue core assembly 5.

[0026] The working principle and usage process of this utility model are as follows: When in use, the sealing strip 9 on the bottom surface of the upper glue core assembly 2 will be embedded in the sealing groove 11 on the upper surface of the lower glue core assembly 5. By utilizing the compatibility between the sealing strip 9 and the sealing groove 11, the sealing between the upper glue core assembly 2 and the lower glue core assembly 5 is initially enhanced, preventing fluid from leaking from the connection between the two.

[0027] After the screw 101 in the locking assembly 1 passes through the through hole 3 of the upper core assembly 2, it engages with the threaded cylinder 4 on the lower core assembly 5. The screw 101 is tightened by a tool through the hexagonal groove 102, so that the upper core assembly 2 and the lower core assembly 5 fit together tightly.

[0028] The upper support ring 6 in the upper rubber core assembly 2 provides structural support for the upper rubber seal 8, and the lower support ring 10 in the lower rubber core assembly 5 provides structural support for the lower rubber seal 7, ensuring that the upper rubber seal 8 and the lower rubber seal 7 can maintain a stable shape when subjected to pressure.

[0029] When the blowout preventer is subjected to high-pressure fluid, the upper rubber seal 8 and the lower rubber seal 7 will undergo elastic deformation under pressure and shrink towards the center, thereby tightly wrapping the drill bit or tubing passing through it, forming a radial seal, and preventing high-pressure fluid from leaking from the gap between the drill bit and the rubber core.

[0030] The locking assembly 1 maintains a continuous locking force on the upper rubber core assembly 2 and the lower rubber core assembly 5, ensuring that the upper support ring 6 and the lower support ring 10 always provide sufficient support for the rubber seal body. This ensures that the sealing core will not be excessively displaced or damaged due to excessive pressure during the deformation and sealing process, thus guaranteeing the durability and reliability of the sealing effect.

[0031] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0032] However, the above description is merely a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model. For those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model.

Claims

1. A combined annular blowout preventer sealing core, characterized in that: The assembly includes an upper glue core assembly (2), the bottom surface of which is connected to a sealing strip (9), the upper surface of which has two sets of through holes (3), the upper glue core assembly (2) has two sets of locking assemblies (1) above it, the lower glue core assembly (5) is provided below it, the upper surface of which has two sets of threaded cylinders (4), and the upper surface of which has a sealing groove (11).

2. The combined annular blowout preventer sealing core according to claim 1, characterized in that: The upper rubber core assembly (2) includes an upper support ring (6) and an upper rubber seal (8), with the bottom surface of the upper support ring (6) connected to the upper surface of the upper rubber seal (8).

3. The combined annular blowout preventer sealing core according to claim 1, characterized in that: The lower rubber core assembly (5) includes a lower support ring (10) and a lower rubber seal (7), wherein the upper surface of the lower support ring (10) is connected to the bottom surface of the lower rubber seal (7).

4. The combined annular blowout preventer sealing core according to claim 1, characterized in that: Each of the locking components (1) includes a screw (101), and each screw (101) has a hexagonal groove (102) at its top end.

5. A combined annular blowout preventer sealing core according to claim 1, characterized in that: The sealing groove (11) is adapted to the sealing strip (9).

6. The combined annular blowout preventer sealing core according to claim 1, characterized in that: Each threaded cylinder (4) is adapted to the screw (101).

Images