Casing head connecting structure

Abstract

The utility model relates to the technical field of well drilling tools, in particular to a casing head connecting structure which comprises a casing head, a screwing-on device, a sealing assembly and a connecting assembly, a first connecting hole and a second connecting hole are formed in the periphery of the top of the casing head and the periphery of the top of the screwing-on device respectively, and the first connecting hole and the second connecting hole are opposite in position. The sealing assembly comprises a clamping groove, a fixing groove and a sealing ring, the sealing ring is clamped and fixed in the fixing groove, and the sealing ring corresponds to the top of the clamping groove; the connecting assembly comprises anti-lost hanging lugs, steel chains, fixing bolts and nuts. The anti-lost hanging lugs are welded to the top of the periphery of the casing head. When the upper buckling device is connected to the top of the casing head in a covering mode, the sealing ring clamped and fixed in the fixing groove is clamped into the clamping groove, and the sealing ring is made of a rubber material so that the sealing performance in the working process can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling tools, in particular to a casing head connection structure. Background Art

[0002] The casing head is an important tool used in drilling operations. Its main functions include connecting casing, sealing annular space, supporting the gravity of technical casing and oil layer casing, providing transition connection for installing blowout preventer, tubing head and Christmas tree, and performing construction operations such as supplementary mud squeezing, monitoring and adding balancing fluid.

[0003] At present, the connecting end faces of the casing head and the casing buckle are both planar structures, which leads to poor sealing at the connection. Therefore, a casing head connecting structure is proposed, in which the connecting end face has a sealing structure to greatly improve the sealing during operation. Utility Model Content

[0004] In view of the problems in the prior art, the utility model provides a casing head connection structure, wherein the connection end surface has a sealing structure to greatly improve the sealing performance during operation.

[0005] The technical solution adopted by the utility model to solve the technical problem is a casing head connection structure, including a casing head, a buckle, a sealing assembly and a connection assembly, wherein the casing head and the buckle are respectively provided with a first connection hole and a second connection hole on the periphery of the top, and the first connection hole is opposite to the second connection hole, and the sealing assembly includes a clamping groove, a fixing groove and a sealing ring, and the sealing ring is clamped in the fixing groove, and the sealing ring corresponds to the top of the clamping groove;

[0006] The connection assembly comprises an anti-lost hanging ear, a steel chain, a fixing bolt and a nut, and the anti-lost hanging ear is welded to the outer top of the casing head.

[0007] By adopting the above technical solution, when the buckle cover is connected to the top of the casing head, the sealing ring fixed in the fixing groove is clamped into the clamping groove, and the sealing ring is made of rubber material to improve the sealing performance during operation;

[0008] At the same time, the anti-lost hanging ears are used to facilitate the connection of the steel chains, and one end of the steel chain is used to facilitate the connection of the fixing bolts through the rotating shaft, so as to avoid the fixing bolts being scattered around after disassembly and affecting the connection and installation, thereby ensuring the assembly efficiency;

[0009] When connecting, the fixing bolts are respectively passed through the second connecting hole and the first connecting hole, and then the nuts are connected and fixed from the bottom ends of the fixing bolts, thereby completing the connection and assembly of the casing head and the buckler.

[0010] Specifically, the buckle-up device is located at the top of the casing head.

[0011] By adopting the above technical solution, the buckle cover is used to cover the top of the casing head to facilitate the connection with the relevant drilling tools.

[0012] Specifically, the fixing groove is provided at the bottom of the buckler corresponding to the inner surface of the second connecting hole, and the sealing ring is made of rubber material.

[0013] By adopting the above technical solution, the fixing groove is used to fix the sealing ring, and the sealing ring is made of rubber material to improve the sealing performance during operation.

[0014] Specifically, the slot is provided on the top of the sleeve head corresponding to the inner surface of the first connecting hole.

[0015] By adopting the above technical solution, the sealing ring is easily inserted into the card groove to ensure the sealing of the connecting end surface between the casing head and the buckle.

[0016] Specifically, one end of the steel chain is connected to the anti-lost ear, and the other end of the steel chain is connected to the top of the fixing bolt through a rotating shaft, and a nut is penetrated and connected to the bottom of the outer periphery of the fixing bolt.

[0017] By adopting the above technical solution, the anti-lost hanging ears are used to facilitate the connection of the steel chains respectively, and the fixing bolts are connected through the rotating shaft at one end of the steel chain to avoid the fixing bolts being scattered around after disassembly and affecting the connection and installation, thereby ensuring assembly efficiency.

[0018] Beneficial effects of the utility model:

[0019] (1) The casing head connection structure described in the utility model, when the buckle cover is connected to the top of the casing head, the sealing ring fixed in the fixing groove is clamped into the clamping groove, and the sealing ring is made of rubber material to improve the sealing performance during operation.

[0020] (2) The casing head connection structure described in the utility model uses an anti-lost hanging ear to facilitate the connection of steel chains, and uses one end of the steel chain to facilitate the connection of fixing bolts through a rotating shaft, so as to avoid the fixing bolts being scattered around after disassembly and affecting the connection and installation, thereby ensuring assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 It is an overall schematic diagram of the utility model;

[0023] Figure 2 This is a schematic diagram of the fixing groove structure of the utility model;

[0024] Figure 3 This is a schematic diagram of the steel chain structure of the utility model;

[0025] In the figure: 1. casing head; 2. buckle; 3. first connecting hole; 4. second connecting hole; 5. sealing assembly; 501. slot; 502. fixing slot; 503. sealing ring; 6. connecting assembly; 601. anti-lost ear; 602. steel chain; 603. fixing bolt; 604. nut. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0027] In order to improve the sealing performance during operation, Figure 1-3 As shown, a casing head connection structure described in the utility model includes a casing head 1, a buckle 2, a sealing assembly 5 and a connecting assembly 6. The casing head 1 and the buckle 2 are respectively provided with a first connecting hole 3 and a second connecting hole 4 on the periphery of the top, and the first connecting hole 3 is opposite to the second connecting hole 4. The sealing assembly 5 includes a card slot 501, a fixing slot 502 and a sealing ring 503. The sealing ring 503 is fixed in the fixing slot 502, and the sealing ring 503 corresponds to the top of the card slot 501.

[0028] The connection assembly 6 includes an anti-lost hanging ear 601 , a steel chain 602 , a fixing bolt 603 and a nut 604 , and the anti-lost hanging ear 601 is welded to the outer top of the casing head 1 .

[0029] When in use, when the buckle 2 is covered and connected to the top of the casing head 1, the sealing ring 503 fixed in the fixing groove 502 is inserted into the groove 501, and the sealing ring 503 is made of rubber material to improve the sealing performance during operation;

[0030] At the same time, the anti-lost hanging ears 601 are used to connect the steel chains 602 respectively, and one end of the steel chain 602 is used to connect the fixing bolts 603 respectively through the rotating shaft, so as to avoid the fixing bolts 603 being scattered around after disassembly and affecting the connection and installation, thereby ensuring the assembly efficiency;

[0031] When connecting, the fixing bolt 603 is passed through the second connecting hole 4 and the first connecting hole 3 at the same time, and then the nut 604 is connected and fixed from the bottom end of the fixing bolt 603, thereby completing the connection and assembly of the casing head 1 and the buckle 2.

[0032] In order to improve the sealing performance, for example, Figure 1 , Figure 2 As shown, the utility model also includes that the buckle 2 is located at the top of the casing head 1.

[0033] When in use, the buckle 2 is used to cover the top of the casing head 1 to facilitate connection with related drilling tools.

[0034] For example, Figure 1 , Figure 2 As shown, the utility model also includes that the fixing groove 502 is opened at the bottom of the buckle 2 corresponding to the inner surface of the second connecting hole 4, and the sealing ring 503 is made of rubber material.

[0035] When in use, the fixing groove 502 is used to fix the sealing ring 503, and the sealing ring 503 is made of rubber material to improve the sealing performance during operation.

[0036] For example, Figure 1 As shown, the utility model also includes that the slot 501 is opened on the top of the casing head 1 corresponding to the inner surface of the first connecting hole 3.

[0037] When in use, the card slot 501 is utilized to facilitate the insertion of the sealing ring 503 , so as to ensure the sealing of the connecting end surface between the casing head 1 and the buckle 2 .

[0038] For example, Figure 1 , Figure 3 As shown, the utility model also includes that one end of the steel chain 602 is connected to the anti-lost ear 601, and the other end of the steel chain 602 is connected to the top of the fixing bolt 603 through a rotating shaft, and a nut 604 is penetrated and connected to the bottom of the outer periphery of the fixing bolt 603.

[0039] When in use, the anti-lost hanging ears 601 are used to connect the steel chains 602 respectively, and one end of the steel chain 602 is used to connect the fixing bolts 603 through the rotating shaft to avoid the fixing bolts 603 being scattered around after disassembly and affecting the connection and installation, thereby ensuring assembly efficiency.

[0040] When the utility model is in use, when the buckle 2 is covered and connected to the top of the casing head 1, the sealing ring 503 fixed in the fixing groove 502 is clamped into the clamping groove 501, and the sealing ring 503 is made of rubber material to improve the sealing performance during operation;

[0041] At the same time, the anti-lost hanging ears 601 are used to connect the steel chains 602 respectively, and one end of the steel chain 602 is used to connect the fixing bolts 603 respectively through the rotating shaft, so as to avoid the fixing bolts 603 being scattered around after disassembly and affecting the connection and installation, thereby ensuring the assembly efficiency;

[0042] When connecting, the fixing bolt 603 is passed through the second connecting hole 4 and the first connecting hole 3 at the same time, and then the nut 604 is connected and fixed from the bottom end of the fixing bolt 603, thereby completing the connection and assembly of the casing head 1 and the buckle 2.

[0043] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents.

Claims

1. A casing head connection structure, characterized in that: The invention comprises a casing head (1), a buckle-up device (2), a sealing component (5) and a connecting component (6); the casing head (1) and the buckle-up device (2) are respectively provided with a first connecting hole (3) and a second connecting hole (4) on the periphery of the top, and the first connecting hole (3) and the second connecting hole (4) are opposite to each other; the sealing component (5) comprises a clamping groove (501), a fixing groove (502) and a sealing ring (503); the sealing ring (503) is clamped in the fixing groove (502), and the sealing ring (503) corresponds to the top of the clamping groove (501); The connection assembly (6) comprises an anti-lost hanging ear (601), a steel chain (602), a fixing bolt (603) and a nut (604), and the anti-lost hanging ear (601) is welded to the outer top of the casing head (1).

2. A casing head connection structure according to claim 1, characterized in that: The buckle-up device (2) is located on the top of the casing head (1).

3. A casing head connection structure according to claim 1, characterized in that: The fixing groove (502) is formed on the bottom of the buckle (2) and corresponds to the inner surface of the second connecting hole (4), and the sealing ring (503) is made of rubber material.

4. A casing head connection structure according to claim 1, characterized in that: The clamping groove (501) is provided on the top of the casing head (1) and corresponds to the inner surface of the first connecting hole (3).

5. The casing head connection structure according to claim 1, characterized in that: One end of the steel chain (602) is connected to the anti-lost hanging ear (601), and the other end of the steel chain (602) is connected to the top of the fixing bolt (603) through a rotating shaft, and a nut (604) is penetrated and connected to the bottom of the outer periphery of the fixing bolt (603).

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