Double-layer rubber core assembling equipment of annular blowout preventer

Abstract

The utility model discloses double-layer rubber core assembling equipment of an annular blowout preventer, which comprises a first limiting ring, an outer-layer rubber core component is mounted at the bottom of the first limiting ring, a positioning threaded rod is rotatably arranged at the top of the first limiting ring, and a second limiting ring in threaded fit with the positioning threaded rod is arranged above the first limiting ring. And an inner-layer rubber core assembly is mounted at the bottom of the second limiting ring. A second limiting ring is controlled to move to drive a connecting ring to move, a guide block moves to drive a third rubber ring and a fourth rubber ring to move synchronously until the guide block is inserted into a corresponding guide groove, at the moment, the third rubber ring moves into a first rubber ring, and the fourth rubber ring moves into a second rubber ring; and after the outer-layer rubber core assembly and the inner-layer rubber core assembly are assembled, the outer-layer rubber core assembly and the inner-layer rubber core assembly can be quickly mounted in the process.

Description

Technical Field

[0001] This utility model belongs to the field of blowout preventer technology, and in particular relates to a double-layer rubber core assembly device for annular blowout preventers. Background Technology

[0002] The rubber core of the annular blowout preventer is the core sealing component in well control equipment. Its performance directly affects wellhead safety. The rubber core is restricted from moving upward by the top cover. Under the action of the inner conical surface of the piston, it is forced to be squeezed and compressed towards the center of the wellbore until the hollow part of the rubber core is filled with rubber, thus completely sealing the wellhead.

[0003] A search revealed that patent CN210264617U discloses a rubber core for annular wellhead blowout preventers. This core is designed by setting a fixed ring, inside which are a first rubber ring, a second rubber ring, and a third rubber ring. These three sets of rings form three sets of sealing strips. When the drill bit is pulled out and the piston is squeezed, these three sets of sealing strips are formed, thereby improving the sealing performance of the blowout preventer.

[0004] The above methods effectively improve the sealing performance of the blowout preventer. However, a single-layer rubber core may experience sealing failure or rapid wear under extreme conditions (such as high pressure, high temperature, or corrosive media), thereby reducing the sealing performance of the rubber core. In addition, the installation process of the rubber core is complicated. Therefore, we provide a double-layer rubber core assembly device for annular blowout preventers to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a double-layer rubber core assembly device for annular blowout preventers. This device controls the movement of the second limiting ring to drive the movement of the connecting ring, the guide block, and the synchronous movement of the third and fourth rubber rings until the guide block is inserted into the corresponding guide groove. At this point, the third rubber ring moves into the inside of the first rubber ring, and the fourth rubber ring moves into the inside of the second rubber ring, thereby achieving rapid assembly of the outer and inner rubber core components and solving the technical defects in the background art.

[0006] To solve the above technical problems, this utility model is achieved through the following technical solution: a double-layer rubber core assembly device for annular blowout preventers, including a first limiting ring, an outer rubber core assembly installed at the bottom of the first limiting ring, a positioning threaded rod rotatably provided at the top of the first limiting ring, a second limiting ring provided above the first limiting ring and threadedly engaged with the positioning threaded rod, and an inner rubber core assembly installed at the bottom of the second limiting ring;

[0007] The outer rubber core assembly includes a first rubber ring and a second rubber ring. The first rubber ring is fixedly disposed at the bottom of the first limiting ring. The first rubber ring and the second rubber ring are coaxially disposed, and the first rubber ring is located above the second rubber ring.

[0008] The inner core assembly includes a third rubber ring and a fourth rubber ring. The third rubber ring is located below the second limiting ring, and the third rubber ring and the fourth rubber ring are coaxially arranged. The third rubber ring is located above the fourth rubber ring.

[0009] The present invention is further configured such that the diameter of the first rubber ring is greater than the diameter of the second rubber ring, the diameter of the third rubber ring is greater than the diameter of the fourth rubber ring, the inner diameter of the first rubber ring is the same as the outer diameter of the third rubber ring, and the inner diameter of the second rubber ring is the same as the outer diameter of the fourth rubber ring.

[0010] The present invention is further configured such that a plurality of guide rods that slide in cooperation with the second limit ring are fixedly arranged above the first limit ring, a limit block is fixedly arranged on the top of the guide rod, and a knob is fixedly arranged on the top of the positioning threaded rod.

[0011] The present invention is further configured such that the first rubber ring and the second rubber ring are connected by a plurality of first connecting rods, and the third rubber ring and the fourth rubber ring are connected by a plurality of second connecting rods.

[0012] The present invention is further configured such that the first limiting ring has a plurality of guide grooves inside, the bottom of the second limiting ring is fixedly provided with a connecting ring, the third rubber ring is fixedly provided with the bottom of the connecting ring, and the circumferential side of the connecting ring is fixedly provided with a plurality of guide blocks corresponding one-to-one with the guide grooves.

[0013] This utility model has the following beneficial effects:

[0014] 1. This utility model controls the movement of the second limiting ring to drive the movement of the connecting ring, and the movement of the guide block to drive the third and fourth rubber rings to move synchronously until the guide block is inserted into the corresponding guide groove. At this time, the third rubber ring moves into the inside of the first rubber ring, and the fourth rubber ring moves into the inside of the second rubber ring. The outer rubber core assembly and the inner rubber core assembly are precisely assembled, and the rapid installation of the outer rubber core assembly and the inner rubber core assembly is realized at the same time.

[0015] 2. In this utility model, the first and second rubber rings are made of high-temperature resistant and corrosion-resistant fluororubber, and the third and fourth rubber rings are made of highly elastic nitrile rubber. The first and second rubber rings are set on the outer layer, and the third and fourth rubber rings are set on the inner layer. The double-layer design improves the sealing performance and durability of the annular blowout preventer. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a double-layer rubber core assembly device for an annular blowout preventer.

[0018] Figure 2 for Figure 1 The front view of the structure.

[0019] Figure 3 This diagram shows the fit between the first limiting ring and the outer core assembly of this utility model.

[0020] Figure 4 for Figure 3 The front view of the structure.

[0021] Figure 5 This diagram shows the fit between the second limiting ring and the inner core assembly of this utility model.

[0022] Figure 6 for Figure 5 The front view of the structure.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1-First limiting ring, 2-Outer rubber core assembly, 201-First rubber ring, 202-Second rubber ring, 203-First connecting rod, 3-Positioning threaded rod, 301-Third rubber ring, 302-Fourth rubber ring, 303-Second connecting rod, 304-Connecting ring, 305-Guide block, 4-Second limiting ring, 5-Inner rubber core assembly, 6-Guide rod, 7-Limiting block, 8-Knob, 9-Guide groove. Detailed Implementation

[0025] 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 protection scope of the present utility model.

[0026] For a specific implementation example, please refer to Implementation Example 1. Figure 1-6This utility model is a double-layer rubber core assembly device for annular blowout preventers, including a first limiting ring 1, which is installed inside the piston chamber of the blowout preventer, and an outer rubber core assembly 2 is installed at the bottom of the first limiting ring 1.

[0027] Specifically, the outer rubber core assembly 2 includes a first rubber ring 201 and a second rubber ring 202. The first rubber ring 201 is fixedly disposed at the bottom of the first limiting ring 1. The first rubber ring 201 and the second rubber ring 202 are coaxially disposed, and the first rubber ring 201 is located above the second rubber ring 202.

[0028] The top of the first limiting ring 1 is rotatably provided with a positioning threaded rod 3, and a second limiting ring 4 is provided above the first limiting ring 1 that is threadedly engaged with the positioning threaded rod 3. An inner layer rubber core assembly 5 is installed at the bottom of the second limiting ring 4.

[0029] Furthermore, the inner rubber core assembly 5 includes a third rubber ring 301 and a fourth rubber ring 302. The third rubber ring 301 is located below the second limiting ring 4. The third rubber ring 301 and the fourth rubber ring 302 are coaxially arranged, with the third rubber ring 301 positioned above the fourth rubber ring 302. Both the first rubber ring 201 and the second rubber ring 202 are made of high-temperature resistant and corrosion-resistant fluororubber, while both the third rubber ring 301 and the fourth rubber ring 302 are made of highly elastic nitrile rubber. The outer layer is wear-resistant and corrosion-resistant, while the inner layer maintains elasticity, thereby reducing the need for frequent replacements.

[0030] The diameter of the first rubber ring 201 is greater than the diameter of the second rubber ring 202, the diameter of the third rubber ring 301 is greater than the diameter of the fourth rubber ring 302, the inner diameter of the first rubber ring 201 is the same as the outer diameter of the third rubber ring 301, and the inner diameter of the second rubber ring 202 is the same as the outer diameter of the fourth rubber ring 302.

[0031] Furthermore, the first rubber ring 201 and the second rubber ring 202 are connected by a number of first connecting rods 203, and the third rubber ring 301 and the fourth rubber ring 302 are connected by a number of second connecting rods 303.

[0032] The first limiting ring 1 has several guide grooves 9 inside, the bottom of the second limiting ring 4 is fixedly provided with a connecting ring 304, the third rubber ring 301 is fixedly provided at the bottom of the connecting ring 304, and several guide blocks 305 corresponding one-to-one with the guide grooves 9 are fixedly provided on the periphery of the connecting ring 304.

[0033] The second guide ring 4 is controlled to move downward, which drives the connecting ring 304 to move downward, the guide block 305 to move downward, and the third rubber ring 301 and the fourth rubber ring 302 move downward synchronously until the guide block 305 is inserted into the corresponding guide groove 9. At this time, the third rubber ring 301 moves into the inside of the first rubber ring 201 and is in contact with its inner wall, the fourth rubber ring 302 moves into the inside of the second rubber ring 202 and is in contact with its inner wall, the connecting ring 304 is inside the first limiting ring 1, and the bottom of the second limiting ring 4 is in contact with the top of the first limiting ring 1. At this time, the outer core assembly 2 and the inner core assembly 5 are assembled.

[0034] Several guide rods 6 are fixedly installed above the first limiting ring 1 and slide in cooperation with the second limiting ring 4. A limiting block 7 is fixedly installed on the top of the guide rod 6. A knob 8 is fixedly installed on the top of the positioning threaded rod 3. In the initial state, the second limiting ring 4 is in contact with the bottom of the limiting block 7. When the knob 8 is rotated, the second limiting ring 4 moves downward along the guide rod 6.

[0035] The working principle of this utility model is as follows: In the initial state, the second limiting ring 4 is attached to the bottom of the limiting block 7, the first limiting ring 1 is installed inside the blowout preventer piston chamber, the knob 8 is rotated, the second limiting ring 4 moves downward along the guide rod 6, so that the connecting ring 304 moves downward, the guide block 305 moves downward, the third rubber ring 301 and the fourth rubber ring 302 move downward synchronously until the guide block 305 is inserted into the corresponding guide groove 9. At this time, the third rubber ring 301 moves into the inside of the first rubber ring 201 and is attached to its inner wall, the fourth rubber ring 302 moves into the inside of the second rubber ring 202 and is attached to its inner wall, the connecting ring 304 is inside the first limiting ring 1, the bottom of the second limiting ring 4 is attached to the top of the first limiting ring 1, at this time the outer rubber core assembly 2 and the inner rubber core assembly 5 are assembled.

[0036] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A double-layer rubber core assembly device for an annular blowout preventer, comprising a first limiting ring (1), characterized in that: The first limiting ring (1) has an outer rubber core assembly (2) installed at its bottom, a positioning threaded rod (3) rotatably mounted on its top, and a second limiting ring (4) threadedly engaged with the positioning threaded rod (3) above the first limiting ring (1). The second limiting ring (4) has an inner rubber core assembly (5) installed at its bottom. The outer rubber core assembly (2) includes a first rubber ring (201) and a second rubber ring (202). The first rubber ring (201) is fixedly mounted on the bottom of the first limiting ring (1). The first rubber ring (201) and the second rubber ring (202) are coaxially arranged, with the first rubber ring (201) positioned above the second rubber ring (202); the inner core assembly (5) includes a third rubber ring (301) and a fourth rubber ring (302), with the third rubber ring (301) positioned below the second limiting ring (4), and the third rubber ring (301) and the fourth rubber ring (302) being coaxially arranged, with the third rubber ring (301) positioned above the fourth rubber ring (302).

2. The double-layer rubber core assembly equipment for annular blowout preventers according to claim 1, characterized in that, The diameter of the first rubber ring (201) is greater than the diameter of the second rubber ring (202), the diameter of the third rubber ring (301) is greater than the diameter of the fourth rubber ring (302), the inner diameter of the first rubber ring (201) is the same as the outer diameter of the third rubber ring (301), and the inner diameter of the second rubber ring (202) is the same as the outer diameter of the fourth rubber ring (302).

3. The double-layer rubber core assembly equipment for annular blowout preventers according to claim 2, characterized in that, A plurality of guide rods (6) that slide with the second limit ring (4) are fixedly provided above the first limit ring (1). A limit block (7) is fixedly provided on the top of the guide rod (6). A knob (8) is fixedly provided on the top of the positioning threaded rod (3).

4. The double-layer rubber core assembly equipment for annular blowout preventers according to claim 3, characterized in that, The first rubber ring (201) and the second rubber ring (202) are connected by a plurality of first connecting rods (203), and the third rubber ring (301) and the fourth rubber ring (302) are connected by a plurality of second connecting rods (303).

5. The double-layer rubber core assembly equipment for an annular blowout preventer according to claim 4, characterized in that, The first limiting ring (1) has several guide grooves (9) inside, and the bottom of the second limiting ring (4) is fixedly provided with a connecting ring (304).

6. The double-layer rubber core assembly equipment for an annular blowout preventer according to claim 5, characterized in that, The third rubber ring (301) is fixedly installed at the bottom of the connecting ring (304), and a number of guide blocks (305) corresponding one-to-one with the guide groove (9) are fixedly installed on the circumferential side of the connecting ring (304).

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