Floating coupling capable of crushing completely

Abstract

The utility model relates to the technical field of floating couplings, and discloses a completely-broken floating coupling which comprises an upper connector, the inner wall of the upper connector is rotatably connected with a lower connector, a rupture disk is arranged in the upper connector, the outer wall of the rupture disk is provided with an impact assembly, and the impact assembly is used for impacting the surface of the rupture disk. The impact assembly comprises an impact inclined face, the impact inclined face is arranged on one side of the rupture disc, the impact inclined face is fixedly connected to the inner wall of the lower connector, a pressure bearing piece is arranged on one side of the rupture disc, and a shearing piece is arranged on one side of the pressure bearing piece and fixedly connected to the inner wall of the lower connector. According to the utility model, the connecting piece on one side of the pressure-bearing piece is sheared off through the shearing piece, and liquid such as slurry is utilized to push the rupture disc to impact the inclined surface of the impact inclined surface, so that the edge of the rupture disc is collided with the inclined surface of the impact inclined surface, the rupture disc is broken into smaller fragments, and the crushing effect of the equipment on the rupture disc is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of floating couplings, in particular to a completely broken floating coupling. Background Art

[0002] The floating coupling is a crucial device in the field of oil production, especially suitable for complex downhole environments such as extended reach wells and horizontal wells. It plays an irreplaceable role in casing running operations and brings many significant advantages to the entire production process. Its sophisticated design enables it to cleverly reduce the friction problems faced by the casing when running in complex downhole environments, thereby ensuring that the casing string can be smoothly and efficiently lowered to the predetermined well depth. This not only significantly shortens the drilling operation time and improves production efficiency, but also effectively avoids casing wear and damage caused by difficulties in running the casing, thereby ensuring the integrity and stability of the casing.

[0003] Traditional downhole related equipment has a unique mechanical structure and workflow. Some devices are designed with a combination of multiple mechanical components, such as using sturdy connecting joints to tightly connect different parts to ensure the stability of the overall structure. In terms of workflow, when the device starts running, it relies on a specific pressure transmission mechanism to accurately transmit the pressure applied at the wellhead to the key parts inside the device, activating the corresponding mechanical action. At the same time, through the internally designed channels and chambers, the orderly flow and storage of liquids or gases can be achieved to meet the functional requirements of different operation stages. These devices can operate stably under normal well conditions, and the downhole pressure, temperature and other environmental factors are fully considered during the design and manufacturing process to ensure the reliability of their performance;

[0004] However, existing floating couplings usually use a ring to impact the rupture disk to break it. This ring impact method has the problem of insufficient accuracy. During the impact process, due to the less than ideal contact and action mode between the ring and the rupture disk, it is difficult to completely crush the rupture disk. After the impact and crushing, an annular glass ring will remain in the floating coupling. These fragments will seriously interfere with the normal circulation of the liquid in the equipment, thereby affecting the normal operation and function of the entire equipment, and hindering downhole operations. Therefore, a floating coupling with complete crushing is proposed to solve the above problems. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a completely crushed floating coupling, which aims to improve the problem that the equipment usually uses a ring to impact the rupture disk, which easily leads to incomplete crushing of the rupture disk, leaving fragments of the rupture disk inside the equipment, thereby affecting the liquid circulation.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A completely broken floating coupling comprises an upper joint, the inner wall of which is rotatably connected to a lower joint, a rupture disk disposed inside the upper joint, an impact assembly disposed on the outer wall of the rupture disk, and the impact assembly being used to impact the surface of the rupture disk;

[0008] The impact assembly includes an impact slope, which is provided on one side of the rupture disk and fixedly connected to the inner wall of the lower joint. A pressure-bearing member is provided on one side of the rupture disk, and a shearing member is provided on one side of the pressure-bearing member, and the shearing member is fixedly connected to the inner wall of the lower joint.

[0009] As a further description of the above technical solution:

[0010] An elastic seal is fixedly connected to the outer wall of the rupture disk, and the elastic seal is used to seal the outer wall of the rupture disk to prevent mud from flowing into the interior of the lower joint;

[0011] As a further description of the above technical solution:

[0012] An O-shaped elastic sealing ring is provided on the outer wall of the elastic sealing member, and the O-shaped elastic sealing ring is used to seal the gap between the elastic sealing member and the elastic support member to further enhance the sealing effect of the rupture disk. The O-shaped elastic sealing ring is fixedly connected to the inner wall of the upper joint;

[0013] As a further description of the above technical solution:

[0014] A chamber is provided inside the upper joint, and an elastic support member is provided on one side of the elastic sealing member. The elastic support member is used to pre-tighten the rupture disk without generating significant pre-tightening stress on the rupture disk while the pressure-bearing member pre-tightens the rupture disk, and also seals the rupture disk.

[0015] As a further description of the above technical solution:

[0016] The elastic support member is fixedly connected to one side of the pressure-bearing member, and a flow hole is provided inside the pressure-bearing member;

[0017] As a further description of the above technical solution:

[0018] A plurality of L-shaped elastic sealing rings are fixedly connected to the interior of the lower joint, and the L-shaped elastic sealing rings are arranged on the inner wall of the upper joint. The L-shaped elastic sealing rings are used to seal the connection between the upper joint and the lower joint.

[0019] The utility model has the following beneficial effects:

[0020] In the utility model, the connecting piece on one side of the pressure-bearing piece is cut off by the shearing piece, and the rupture disk is pushed to impact the inclined surface of the impact inclined surface by using mud or other liquid, so that the edge of the rupture disk collides with the inclined surface of the impact inclined surface, causing the rupture disk to break into smaller fragments. This solves the problem that the equipment usually uses a circular ring to impact the rupture disk, which easily leads to incomplete crushing of the rupture disk and causes fragments of the rupture disk to remain inside the equipment, thereby affecting the circulation of liquid, and enhances the crushing effect of the equipment on the rupture disk. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic plan view of a completely broken floating coupling proposed by the present invention;

[0022] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0023] Figure 3 This is a schematic diagram of the O-type elastic sealing ring structure of a completely broken floating coupling proposed by the present invention;

[0024] Figure 4 This is a schematic diagram of the impact of a rupture disk of a completely broken floating coupling proposed in the present invention;

[0025] Figure 5 This is a schematic diagram of a completely crushed floating coupling rupture disk after crushing.

[0026] Legend:

[0027] 1. Upper joint; 2. Lower joint; 3. Flow hole; 4. Chamber; 5. L-shaped elastic sealing ring; 6. Shear member; 7. Pressure-bearing member; 8. Impact slope; 9. Elastic support member; 10. Rupture disk; 11. Elastic sealing member; 12. O-shaped elastic sealing ring. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] Reference Figure 1 - Figure 2The present invention provides an embodiment of a completely broken floating coupling, comprising an upper joint 1, the inner wall of which is rotatably connected to a lower joint 2. The upper joint 1 is made of high-strength alloy steel, and its structural design is unique. The outer surface is specially anti-slip treated to ensure stability when connected to the casing. At the same time, a fine threaded structure is provided inside to effectively transmit axial force and torque. The lower joint 2 is made of a metal material with excellent toughness and pressure resistance. Its unique sealing structure can prevent the leakage of liquid or gas during use, ensuring the sealing of the entire casing string. A rupture disk 10 is provided inside the upper joint 1, and an impact assembly is provided on the outer wall of the rupture disk 10. The impact assembly is used to impact the surface of the rupture disk 10.

[0030] The impact assembly includes an impact slope 8, which is made of a wear-resistant and elastic material. Its surface is smooth, the angle is between twenty and forty degrees, and the guiding effect is good. The impact slope 8 is arranged on one side of the rupture disk 10, and the impact slope 8 is fixedly connected to the inner wall of the lower joint 2. A pressure-bearing part 7 is provided on one side of the rupture disk 10. The pressure-bearing part 7 is a component that bears huge pressure. It is made of high-strength pressure-resistant metal material. Its surface has been specially hardened and can withstand the strong impact force from the rupture disk 10. A shearing part 6 is provided on one side of the pressure-bearing part 7, and the shearing part 6 is fixedly connected to the inner wall of the lower joint 2.

[0031] Reference Figure 3 - Figure 5 The outer wall of the rupture disk 10 is fixedly connected with an elastic seal 11, which is used to seal the outer wall of the rupture disk 10 to prevent mud from flowing into the interior of the lower joint 2. The outer wall of the elastic seal 11 is provided with an O-type elastic sealing ring 12, which is used to seal the gap between the elastic seal 11 and the elastic support member 9 to further enhance the sealing effect of the rupture disk 10. The O-type elastic sealing ring 12 is fixedly connected to the inner wall of the upper joint 1, and a chamber 4 is opened inside the upper joint 1. The elastic seal An elastic support member 9 is provided on one side of 11. The elastic support member 9 is used for not generating obvious pre-tightening stress on the rupture disk 10 while the pressure-bearing member 7 pre-tightens the rupture disk 10, and also seals the rupture disk 10. The elastic support member 9 is fixedly connected to one side of the pressure-bearing member 7. A flow hole 3 is provided inside the pressure-bearing member 7. A plurality of L-shaped elastic sealing rings 5 ​​are fixedly connected to the inside of the lower joint 2. The L-shaped elastic sealing rings 5 ​​are provided on the inner wall of the upper joint 1. The L-shaped elastic sealing rings 5 ​​are used to seal the connection between the upper joint 1 and the lower joint 2.

[0032] Specifically, during the complex downhole equipment lowering process, the upper connector 1 and lower connector 2 are tightly connected to the casing, forming a complete casing string. Within the casing string structure, the portion below the rupture disk 10 is an air segment, which plays a unique role during the equipment lowering process. This air segment provides a certain amount of buoyancy for the entire system, reducing resistance during the lowering process. The portion above the rupture disk 10 is filled with liquid such as mud. Once the casing string is successfully lowered into place, pressurization is performed at the wellhead. When the pressure gradually increases to the set shear pressure value of the shear member 6, the shear member 6 begins to function. The shearing piece 6 adopts a shear pin made of high-strength copper, which can accurately shear when a specific pressure is reached. After the shearing piece 6 cuts off the connecting piece on one side of the pressure-bearing piece 7, the rupture disc 10 pushes the pressure-bearing piece 7 downward under the action of pressure. During the downward process, when the rupture disc 10 directly hits the impact slope 8, due to the unique contact method between the two, the rupture process presents an ideal effect. The rupture disc 10 and the impact slope 8 are in line contact, and the impact area is the edge of the rupture disc 10. The edge impact can cause the rupture disc 10 to break into smaller fragments. At the same time, the rupture disc 10 produces a deformation that collapses toward the center, so that the entire rupture disc 10 is carried away by the mud along the impact slope 8 after being broken, without any residue, thereby achieving the purpose of completely crushing the rupture disc 10, effectively preventing the rupture disc 10 from being incompletely crushed and leaving residue inside the equipment, avoiding the adverse effects of residual fragments on the flow of liquids such as mud, and ensuring the smooth progress of the entire underground operation.

[0033] When the rupture disk 10 is broken, the rupture disk 10 is moved away from the wellhead 7 and the pressure is increased.

[0034] 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 replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A completely broken floating coupling, comprising an upper joint (1), characterized in that: The inner wall of the upper joint (1) is rotatably connected to the lower joint (2), a rupture disk (10) is provided inside the upper joint (1), and an impact assembly is provided on the outer wall of the rupture disk (10), and the impact assembly is used to impact the surface of the rupture disk (10); The impact assembly comprises an impact bevel (8), the impact bevel (8) being arranged on one side of the rupture disk (10), the impact bevel (8) being fixedly connected to the inner wall of the lower joint (2), a pressure-bearing member (7) being arranged on one side of the rupture disk (10), a shearing member (6) being arranged on one side of the pressure-bearing member (7), and the shearing member (6) being fixedly connected to the inner wall of the lower joint (2).

2. A completely broken floating coupling according to claim 1, characterized in that: An elastic sealing member (11) is fixedly connected to the outer wall of the rupture disk (10), and the elastic sealing member (11) is used to seal the outer wall of the rupture disk (10) to prevent mud from flowing into the interior of the lower joint (2).

3. The completely broken floating coupling according to claim 2, characterized in that: An O-type elastic sealing ring (12) is provided on the outer wall of the elastic sealing member (11). The O-type elastic sealing ring (12) is used to seal the gap between the elastic sealing member (11) and the elastic support member (9), thereby further enhancing the sealing effect of the rupture disk (10). The O-type elastic sealing ring (12) is fixedly connected to the inner wall of the upper joint (1).

4. The completely broken floating coupling according to claim 2, characterized in that: A chamber (4) is provided inside the upper joint (1), and an elastic support member (9) is provided on one side of the elastic sealing member (11). The elastic support member (9) is used for pre-tightening the rupture disk (10) by the pressure-bearing member (7) without generating significant pre-tightening stress on the rupture disk (10), and also for sealing the rupture disk (10).

5. The completely broken floating coupling according to claim 4, characterized in that: The elastic support member (9) is fixedly connected to one side of the pressure-bearing member (7), and a flow hole (3) is provided inside the pressure-bearing member (7).

6. The completely broken floating coupling according to claim 1, characterized in that: A plurality of L-shaped elastic sealing rings (5) are fixedly connected to the interior of the lower joint (2), and the L-shaped elastic sealing rings (5) are arranged on the inner wall of the upper joint (1). The L-shaped elastic sealing rings (5) are used to seal the connection between the upper joint (1) and the lower joint (2).

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