An ultra-high pressure bushing head with detachable function

Abstract

The application discloses a kind of ultra-high pressure casing head with detachable function in the technical field of casing head, including casing body, installation through opening is set in the casing body, the valve body is communicated in the left and right sides of casing body;When installing casing body and conveying pipe in the process of oil drilling, the first sliding groove is used by clamping block, when clamping block moves upwards in the first sliding groove, it gradually moves to installation cylinder under the action of the first sliding groove, then clamping block gradually moves to clamping groove along positioning block, positioning block is compressed, clamping block can stably clamp installation cylinder, and the position of clamping block is adjusted by adjusting rod to adjust the clamping fastening degree between clamping block and installation cylinder, clamping block is used to clamp and fix installation cylinder, which can be quickly and simply installed and disassembled, without complicated operation, reduce the time used for installation and disassembly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of casing head, in particular to an ultra-high pressure casing head with detachable function. BACKGROUND

[0002] The casing head is commonly used in the process of oil and gas exploitation, installed on the upper end of the surface casing column, used to fix the wellhead of the drilling well, connect the wellhead casing column, support the connection assembly of the technical casing and the oil layer casing, can be used for sealing the annular space between each layer of pipe, providing transition connection for the installation of blowout preventer, tubing head and Christmas tree, and through the two side openings on the casing head body, mud supplementing, monitoring and balance liquid injection can be carried out.

[0003] In the process of oil drilling, the casing head is usually installed on the drilling well to fix the casing column, and the casing head and the casing column are generally installed together through threads, and the casing column needs to be rotated during installation and disassembly, which is relatively cumbersome and time-consuming. The casing column is generally long, and during installation and disassembly, the casing column is easy to shake, causing movement between the end of the casing column and the casing head, thereby deforming the threads at the end of the casing column, affecting the subsequent installation of the casing column. In addition, during the long-term work of the casing column, the connection position of the casing column and the casing head is easy to loosen due to vibration, thereby affecting the normal work of the casing column. SUMMARY

[0004] The present application aims to provide an ultra-high pressure casing head with detachable function to solve the problems raised in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: an ultra-high pressure casing head with detachable function, comprising a casing body, an installation opening is formed in the inside of the casing body, a valve body is communicated with the left and right sides of the casing body, a pressure gauge is communicated with the surface of the valve body on one side, a conveying pipe is arranged in the installation opening, a sealing mechanism is arranged on the surface of the conveying pipe, the sealing mechanism is used for sealing between the conveying pipe and the casing body, an installation clamping mechanism is arranged on the surface of the conveying pipe, the installation clamping mechanism is used for keeping the conveying pipe fixed during installation, a limiting mechanism is arranged in the inside of the casing body, the limiting mechanism is used for limiting the end of the conveying pipe, an adjusting mechanism is arranged on the surface of the casing body, the adjusting mechanism is used for adjusting the clamping fastening degree of the installation clamping mechanism, a fastening mechanism is arranged at the bottom of the adjusting mechanism, the fastening mechanism is used for supporting and fastening the limiting mechanism during the adjustment of the clamping fastening degree of the installation clamping mechanism by the adjusting mechanism.

[0006] As a further scheme of the present application, the sealing mechanism comprises a fixed ring fixedly connected to the surface of the conveying pipe, and a ring-mounted sealing strip fixedly connected to the surface of the fixed ring and abutting against the inner wall of the mounting opening.

[0007] As a further scheme of the present application, the mounting and clamping mechanism comprises a mounting cylinder sliding on the surface of the conveying pipe, wherein the surface of the conveying pipe is provided with a stepped groove, the upper end of the mounting cylinder extends inward, the surface of the mounting cylinder is provided with an annular clamping groove, the inner wall of the mounting opening is provided with an annular first sliding groove, the inner wall of the first sliding groove away from the mounting cylinder is inclined, a plurality of arc-shaped clamping blocks are slidingly connected in the first sliding groove, the clamping blocks are located in the clamping groove, the clamping blocks are arranged at equal angles and circumferentially, and the surface of each clamping block is fixedly connected with an elastically stretchable positioning block, wherein the upper and lower sides of the positioning block close to the conveying pipe are inclined.

[0008] As a further scheme of the present application, the limiting mechanism comprises a plurality of L-shaped limiting plates, wherein the limiting plates are arranged on the inner wall surface of the mounting opening, the limiting plates are arranged at equal angles and circumferentially, and the upper end of each limiting plate is inclined, and the limiting plates are located below the first sliding groove.

[0009] As a further scheme of the present application, the adjusting mechanism comprises a plurality of second sliding grooves, wherein the second sliding grooves are arranged on the surface of the sleeve body, the second sliding grooves extend to the inner part of the sleeve body and are in communication with the first sliding grooves, respectively, an adjusting rod is slidingly connected in the second sliding groove, a first connecting rod which is stretchable is connected between the adjusting rod and the clamping block, a threaded sleeve is threadedly connected to the surface of the adjusting rod, and the threaded sleeve is rotationally connected to the upper end surface of the sleeve body.

[0010] As a further scheme of the present application, the fastening mechanism comprises a plurality of arc-shaped third sliding grooves, wherein the third sliding grooves are arranged on the inner wall surface of the mounting opening, the third sliding grooves are located below the first sliding groove, the limiting plates are elastically sliding in the third sliding grooves, the inner wall of the third sliding groove away from the limiting plate is inclined, a jacking block is slidingly connected in the third sliding groove, the jacking block is located between the limiting plate and the inner wall of the third sliding groove, the second sliding groove is in communication with the third sliding groove, and a second connecting rod which is stretchable is connected between the adjusting rod and the jacking block.

[0011] As a further scheme of the present application, the surface of the sleeve body is rotationally connected with a driving ring, the inner side of the driving ring abuts against the surface of the plurality of threaded sleeves, the driving ring is used to drive the rotation of the plurality of threaded sleeves, and a plurality of driving grooves are arranged on the surface of the driving ring.

[0012] As a further scheme of the present application, the driving ring side is provided with a plurality of triangular limiting grooves, the sleeve body surface is provided with a groove, a limiting rod is elastically and slidably connected in the groove, and the limiting rod upper end extends into the limiting groove.

[0013] As a further scheme of the present application, the first sliding groove bottom is slidably connected with an annular extrusion ring, the extrusion ring is soft and elastic, and a telescopic third connecting rod is connected between the clamping block and the extrusion ring.

[0014] As a further scheme of the present application, the fixing ring bottom is fixedly connected with a guide ring, and the guide ring bottom is a slope.

[0015] Compared with the prior art, the present application has the following advantages:

[0016] 1. In the process of installing the sleeve body and the conveying pipe in the oil drilling, the clamping block and the first sliding groove are used, the clamping block moves upward in the first sliding groove and gradually moves close to the installation cylinder under the action of the first sliding groove, then the clamping block moves into the clamping groove along the positioning block, the positioning block is compressed, the clamping block can stably clamp the installation cylinder, the clamping tightness between the clamping block and the installation cylinder is adjusted by adjusting the position of the clamping block through the adjusting rod, the clamping block is used to clamp and fix the installation cylinder, the installation and disassembly can be quickly and simply performed, the tedious operation is not needed, and the time used for installation and disassembly is reduced.

[0017] 2. In the process of installing and fixing the installation cylinder, the driving ring is rotated, the driving ring can simultaneously act on the rotation of the plurality of threaded sleeves, the rotation of the plurality of threaded sleeves can act on the movement of the plurality of adjusting rods and the plurality of clamping blocks, the movement of the plurality of clamping blocks can simultaneously clamp the installation cylinder, the clamping effect of the plurality of clamping blocks on the installation cylinder is ensured, the clamping positions of the plurality of clamping blocks are different, the clamping position of the installation cylinder is different, the position of the installation cylinder is deviated, the fixing of the installation cylinder is affected, and the sealing effect of the sealing strip is weakened.

[0018] 3. In the process of installing and fixing the installation cylinder, the limiting groove extrudes the limiting rod when the driving ring is rotated, the limiting rod is extruded into the groove, then when the limiting groove moves to the position of the limiting rod, the limiting rod moves into the limiting groove to limit the driving ring, which is beneficial to keeping the driving ring stable during the conveying operation of the conveying pipe, avoiding that the vibration generated during the conveying operation of the conveying pipe makes the driving ring rotate, and affecting the clamping and fixing of the clamping block on the installation cylinder. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a general structure schematic view of the present application.

[0020] Figure 2 As Figure 1 Structure schematic diagram of the part A in the application;

[0021] Figure 3 Structure schematic diagram of the part A in the application;

[0022] Figure 4 As Figure 3 Structure schematic diagram of the part B in the application;

[0023] Figure 5 As Figure 3 Structure schematic diagram of the part C in the application;

[0024] Figure 6 Structure schematic diagram of the part C in the application;

[0025] Figure 7 Structure schematic diagram of the part C in the application;

[0026] Figure 8 Structure schematic diagram of the part C in the application;

[0027] Figure 9 Structure schematic diagram of the part C in the application.

[0028] In the drawings, the components represented by each reference numeral are listed as follows:

[0029] 1-casing body, 2-mounting opening, 3-valve body, 4-pressure gauge, 5-conveying pipe, 6-fixing ring, 7-sealing strip, 8-mounting cylinder, 9-step groove, 10-clamping groove, 11-first sliding groove, 12-clamping block, 13-positioning block, 14-limiting plate, 15-second sliding groove, 16-adjusting rod, 17-first connecting rod, 18-threaded sleeve, 19-third sliding groove, 20-impelling block, 201-second connecting rod, 21-driving ring, 22-driving groove, 23-limiting groove, 24-groove, 25-limiting rod, 26-extrusion ring, 27-third connecting rod, 28-guiding ring. DETAILED DESCRIPTION

[0030] The present application is described in greater detail by the specific embodiments below, and other advantages and effects of the present application can be easily understood by those skilled in the art from the content disclosed in the present specification. The present application can also be implemented or applied by other different embodiments, and each detail in the present specification can be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0031] It should be noted that the drawings provided in the following embodiments only illustrate the basic concept of the present application in a schematic manner, and only the components related to the present application are shown in the drawings, not the number, shape and size of the components when actually implemented. The actual implementation of each component may be a random change, and the component layout may be more complex.

[0032] Please refer to Figures 1-9 The present application provides a technical solution: a detachable ultra-high pressure sleeve head, comprising a sleeve body 1, an installation opening 2 is formed in the inside of the sleeve body 1, and a valve body 3 is communicated with the left and right sides of the sleeve body 1. A pressure gauge 4 is communicated with the surface of one side of the valve body 3. A conveying pipe 5 is arranged in the installation opening 2. A sealing mechanism is arranged on the surface of the conveying pipe 5. The sealing mechanism is used for sealing between the conveying pipe 5 and the sleeve body 1. An installation clamping mechanism is arranged on the surface of the conveying pipe 5. The installation clamping mechanism is used for fixing the conveying pipe 5 during installation. A limiting mechanism is arranged in the inside of the sleeve body 1. The limiting mechanism is used for limiting the end of the conveying pipe 5. An adjusting mechanism is arranged on the surface of the sleeve body 1. The adjusting mechanism is used for adjusting the clamping and fastening degree of the installation clamping mechanism. A fastening mechanism is arranged at the bottom of the adjusting mechanism. The fastening mechanism is used for supporting and fastening the conveying pipe 5 by the limiting mechanism during the adjustment of the clamping and fastening degree of the installation clamping mechanism by the adjusting mechanism.

[0033] The sealing mechanism comprises a fixed ring 6 fixedly connected to the surface of the conveying pipe 5. A sealing strip 7 is fixedly connected to the surface of the fixed ring 6. The sealing strip 7 is attached to the inner wall of the installation opening 2.

[0034] The installation clamping mechanism comprises an installation cylinder 8 sliding on the surface of the conveying pipe 5. The surface of the conveying pipe 5 has a stepped groove 9. The upper end of the installation cylinder 8 extends inward. An annular clamping groove 10 is formed in the surface of the installation cylinder 8. An annular first sliding groove 11 is formed in the installation opening 2. The inner wall of the side of the first sliding groove 11 away from the installation cylinder 8 is inclined. A plurality of arc-shaped clamping blocks 12 are slidingly connected in the first sliding groove 11. The clamping blocks 12 are located in the clamping groove 10. The plurality of clamping blocks 12 are arranged at equal angles in a circle. An elastic and retractable positioning block 13 is fixedly connected to the surface of the clamping block 12. The positioning block 13 is inclined on both sides of the end close to the conveying pipe 5.

[0035] The limiting mechanism comprises a plurality of L-shaped limiting plates 14. The plurality of limiting plates 14 are arranged on the inner wall surface of the installation opening 2. The plurality of limiting plates 14 are arranged at equal angles in a circle. The upper end of the limiting plate 14 is inclined. The limiting plate 14 is located below the first sliding groove 11.

[0036] The adjusting mechanism comprises a plurality of second sliding grooves 15, each of which is formed on the surface of the sleeve body 1 and extends into the sleeve body 1 to communicate with the first sliding grooves 11 respectively, and an adjusting rod 16 is slidably connected in the second sliding groove 15, a first connecting rod 17 which is retractable is connected between the adjusting rod 16 and the clamping block 12, and a threaded sleeve 18 is threadedly connected on the surface of the adjusting rod 16 and is rotationally connected to the upper end surface of the sleeve body 1;

[0037] The fastening mechanism comprises a plurality of arc-shaped third sliding grooves 19, each of which is formed on the inner wall surface of the mounting opening 2 and is located below the first sliding groove 11, the limiting plate 14 is elastically slid in the third sliding groove 19, the inner wall of the third sliding groove 19 away from the limiting plate 14 is a slope, a jacking block 20 is slidably connected in the third sliding groove 19 and is located between the limiting plate 14 and the inner wall of the third sliding groove 19, the second sliding groove 15 communicates with the third sliding groove 19, and a second connecting rod 201 which is retractable is connected between the adjusting rod 16 and the jacking block 20;

[0038] In the process of oil drilling, the casing body 1 needs to be installed at the end of the well, and then the delivery pipe 5 end moves to the installation opening 2, the fixing ring 6 will move to the installation opening 2, the sealing strip 7 will be attached to the inner wall of the installation opening 2, and then the bottom of the delivery pipe 5 will move to the position of the limiting plate 14, the inclined surface at the upper end of the limiting plate 14 will guide the delivery pipe 5, and then the limiting plate 14 will limit the end of the delivery pipe 5 when the delivery pipe 5 moves between the limiting plates 14, and then the installation cylinder 8 moves to the inside of the installation opening 2, the bottom of the installation cylinder 8 will move to the position of the positioning block 13 first, the upper end of the installation cylinder 8 will move to the side close to the stepped groove 9, and then the installation cylinder 8 will extrude the positioning block 13, the positioning block 13 shrinks and moves to the side of the installation cylinder 8, and then when the positioning block 13 moves to the position of the clamping groove 10, the positioning block 13 extends into the clamping groove 10, the clamping block 12 will be at the bottom of the first sliding groove 11, the bottom of the first sliding groove 11 is inclined away from the installation cylinder 8, and the clamping block 12 will not block the movement of the installation cylinder 8, and then the threaded sleeve 18 is rotated, the threaded sleeve 18 will move the adjusting rod 16, the adjusting rod 16 will move the clamping block 12 together through the first connecting rod 17, the clamping block 12 will gradually move to the side close to the installation cylinder 8 under the action of the first sliding groove 11 when moving upward in the first sliding groove 11, and then the clamping block 12 will gradually move into the clamping groove 10 along the positioning block 13, the positioning block 13 is compressed, and the clamping block 12 can stably clamp the installation cylinder 8, the position of the clamping block 12 is adjusted by the adjusting rod 16 to adjust the clamping tightness between the clamping block 12 and the installation cylinder 8, the clamping installation process is relatively simple, the installation time is reduced, and the installation efficiency is improved, the second connecting rod 201 drives the ejector block 20 to move together when the adjusting rod 16 moves the rod, the ejector block 20 moves in the third sliding groove 19, the ejector block 20 gradually moves to the side close to the limiting plate 14 under the action of the inclined surface on the inner wall of the third sliding groove 19, the multiple limiting plates 14 extrude and fix the delivery pipe 5, which can make the delivery pipe 5 be in the middle position of the installation opening 2 during the installation process, ensuring the installation of the delivery pipe 5, and then during the working process after the installation of the delivery pipe 5 is completed, the drilling fluid is delivered in the delivery pipe 5, the pressure in the delivery pipe 5 increases, and the delivery pipe 5 and the installation cylinder 8 have a tendency to move to the outside of the installation opening 2 under the action of the drilling fluid pressure, when the delivery pipe 5 and the installation cylinder 8 are displaced during a long period of work, the movement of the delivery pipe 5 will drive the installation cylinder 8 to move together through the stepped groove 9, the installation cylinder 8 will drive the clamping block 12 to move upward, the clamping block 12 will increase the clamping force of the installation cylinder 8 under the action of the first sliding groove 11, thereby ensuring the clamping of the clamping block 12 to the installation cylinder 8, and then when disassembly is needed after the drilling work is completed, the adjusting rod 16 moves downward through the threaded sleeve 18, the clamping block 12 and the ejector block 20 will move together, the clamping block 12 and the ejector block 20 will move away from the installation cylinder 8 respectively under the action of the first sliding groove 11 and the third sliding groove 19,The clamping block 12 moves out of the clamping groove 10, and then the mounting cylinder 8 and the conveying pipe 5 can be quickly moved out of the mounting opening 2. The clamping block 12 is used to clamp and fix the mounting cylinder, so that the mounting and dismounting can be quickly and conveniently performed, without complicated operation, and the time used for mounting and dismounting is reduced.

[0039] When the mounting cylinder 8 is mounted and fixed, the plurality of threaded sleeves 18 need to be rotated respectively and cannot be rotated simultaneously. As a further scheme of the present application, the sleeve body 1 is rotationally connected with a driving ring 21 on the surface, the inner side of the driving ring 21 is in contact with the surface of the plurality of threaded sleeves 18, and the driving ring 21 is used to drive the plurality of threaded sleeves 18 to rotate. A plurality of driving grooves 22 are formed in the surface of the driving ring 21.

[0040] When the mounting cylinder 8 is mounted and fixed, the driving ring 21 is rotated, the driving ring 21 can simultaneously act on the plurality of threaded sleeves 18 to rotate together, the plurality of threaded sleeves 18 rotating together can act on the plurality of adjusting rods 16 and the plurality of clamping blocks 12 to move together, the plurality of clamping blocks 12 moving together can simultaneously clamp the mounting cylinder 8, so as to ensure the clamping effect of the plurality of clamping blocks 12 on the mounting cylinder 8, avoid the clamping position of the mounting cylinder 8 being different due to the different moving positions of the plurality of clamping blocks 12, and thus the position of the mounting cylinder 8 is deviated, the fixing of the mounting cylinder 8 is affected, and the sealing effect of the sealing strip 7 is weakened. The driving grooves 22 are used to rotate the driving ring 21 through the driving grooves 22 when the clamping blocks 12 need to be further rotated to improve the fastening degree of the clamping blocks 12 on the mounting cylinder 8 after the clamping blocks 12 clamp the mounting cylinder 8.

[0041] During the conveying operation of the conveying pipe 5, the conveying pipe 5 and the mounting cylinder 8 are prone to shaking, which can easily cause the driving ring 21 to move. As a further scheme of the present application, a plurality of triangular limiting grooves 23 are formed in the side surface of the driving ring 21, a recess 24 is formed in the surface of the sleeve body 1, a limiting rod 25 is elastically and slidably connected in the recess 24, the upper end of the limiting rod 25 extends into the limiting groove 23, and one side of the limiting rod 25 is a slope.

[0042] During the mounting and fixing of the mounting cylinder 8, the limiting groove 23 can press the limiting rod 25 when the driving ring 21 is rotated, and the limiting rod 25 can be pressed into the recess 24. Then, when the limiting groove 23 moves to the position of the limiting rod 25, the limiting rod 25 can be moved into the limiting groove 23 to limit the driving ring 21. This is beneficial to keep the driving ring 21 stable during the conveying operation of the conveying pipe 5, so as to avoid the vibration generated during the conveying operation of the conveying pipe 5 from causing the driving ring 21 to rotate, thereby affecting the clamping and fixing of the clamping block 12 on the mounting cylinder 8. Then, when the mounting cylinder 8 needs to be dismounted, the limiting rod 25 can be pressed into the recess 24, and the driving ring 21 can be reversely rotated.

[0043] During the conveying process of the conveying pipe 5, the sealing strip 7 will be moved by the long-time work of the conveying pipe 5, as a further scheme of the present application, the annular extrusion ring 26 is slidably connected at the bottom of the first sliding groove 11, the extrusion ring 26 is soft and elastic, and the third connecting rod 27 is connected between the extrusion ring 26 and the clamping block 12.

[0044] During the installation and fixation of the installation cylinder 8, when the clamping block 12 moves to the side close to the installation cylinder 8, the third connecting rod 27 will move together with the extrusion ring 26, the extrusion ring 26 will shrink and move above the fixing ring 6 to block the fixing ring 6, so as to avoid that the fixing ring 6 moves upward too much to affect the sealing effect of the sealing strip 7, and the extrusion of the fixing ring 6 on the extrusion ring 26 can block the edge of the fixing ring 6 to enhance the sealing property of the fixing ring 6.

[0045] During the movement of the conveying pipe 5 into the installation opening 2, the fixing ring 6 is easily blocked, as a further scheme of the present application, the bottom of the fixing ring 6 is fixedly connected with the guide ring 28, and the bottom of the guide ring 28 is inclined.

[0046] During the movement of the conveying pipe 5 into the installation opening 2, the guide ring 28 can guide the conveying pipe 5 to move into the installation opening 2 together with the fixing ring 6, so as to avoid that the bottom of the fixing ring 6 is blocked by the edge of the installation opening 2 to affect the installation of the conveying pipe 5.

[0047] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought of the present application should be covered by the claims of the present application.

Claims

1. An ultra-high pressure casing head with detachable function, comprising a casing body (1), characterized in that: The sleeve body (1) is internally provided with an installation opening (2), and the sleeve body (1) is communicated with valve bodies (3) on the left and right sides; a surface of one of the valve bodies (3) is communicated with a pressure gauge (4); the installation opening (2) is provided with a conveying pipe (5); the conveying pipe (5) is provided with a sealing mechanism; the sealing mechanism is used for sealing between the conveying pipe (5) and the sleeve body (1); the conveying pipe (5) is provided with an installation clamping mechanism; the installation clamping mechanism is used for fixing the conveying pipe (5) during installation; the sleeve body (1) is internally provided with a limiting mechanism; the limiting mechanism is used for limiting the end of the conveying pipe (5); the sleeve body (1) is provided with an adjusting mechanism on the surface; the adjusting mechanism is used for adjusting the clamping fastening degree of the installation clamping mechanism; the adjusting mechanism is provided with a fastening mechanism at the bottom; the fastening mechanism is used for supporting and fastening the limiting mechanism during the adjustment of the clamping fastening degree of the installation clamping mechanism by the adjusting mechanism. The installation clamping mechanism comprises an installation cylinder (8), the installation cylinder (8) is slidably arranged on the surface of the conveying pipe (5), the conveying pipe (5) is provided with a stepped groove (9) on the surface, the upper end of the installation cylinder (8) extends inward, the installation cylinder (8) is provided with an annular clamping groove (10) on the surface, the installation opening (2) is provided with an annular first sliding groove (11) on the inner wall, the inner wall of the first sliding groove (11) away from the installation cylinder (8) is inclined, a plurality of arc-shaped clamping blocks (12) are slidably connected in the first sliding groove (11), the clamping blocks (12) are located in the clamping groove (10), the clamping blocks (12) are arranged at equal angles in a circle, the clamping blocks (12) are fixedly connected with elastic positioning blocks (13) on the surface, and the positioning blocks (13) are inclined on the upper and lower sides of one end close to the conveying pipe (5).

2. The ultra-high pressure casing head with detachable function according to claim 1, characterized in that: The sealing mechanism comprises a fixed ring (6), the fixed ring (6) is fixedly connected to the surface of the conveying pipe (5), the fixed ring (6) is fixedly connected with a ring-shaped sealing strip (7) on the surface, and the sealing strip (7) is attached to the inner wall of the installation opening (2).

3. The ultra-high pressure casing head with detachable function according to claim 1, characterized in that: The limiting mechanism comprises a plurality of L-shaped limiting plates (14), the limiting plates (14) are arranged on the inner wall surface of the installation opening (2), and the limiting plates (14) are arranged at equal angles in a circle; the upper end of the limiting plate (14) is inclined; and the limiting plate (14) is located below the first sliding groove (11).

4. The ultra-high pressure casing head with detachable function according to claim 3, characterized in that: The adjusting mechanism comprises a plurality of second sliding grooves (15) which are formed on the surface of the sleeve body (1), the second sliding grooves (15) extend into the sleeve body (1) and are in communication with the plurality of first sliding grooves (11) respectively, an adjusting rod (16) is slidably connected in the second sliding groove (15), a first connecting rod (17) which is retractable is connected between the adjusting rod (16) and the clamping block (12), a threaded sleeve (18) is threadedly connected on the surface of the adjusting rod (16), and the threaded sleeve (18) is rotatably connected to the upper end surface of the sleeve body (1).

5. The ultra-high pressure casing head with detachable function according to claim 4, characterized in that: The fastening mechanism comprises a plurality of arc-shaped third sliding grooves (19) which are formed on the inner wall surface of the mounting opening (2), the third sliding grooves (19) are located below the first sliding grooves (11), the limiting plate (14) is elastically slid in the third sliding groove (19), the inner wall of the third sliding groove (19) away from the limiting plate (14) is inclined, a jacking block (20) is slidably connected in the third sliding groove (19), the jacking block (20) is located between the limiting plate (14) and the inner wall of the third sliding groove (19), the second sliding groove (15) is in communication with the third sliding groove (19), and a second connecting rod (201) which is retractable is connected between the adjusting rod (16) and the jacking block (20).

6. The ultra-high pressure casing head with detachable function according to claim 4, characterized in that: A driving ring (21) is rotatably connected to the surface of the sleeve body (1), the inner side of the driving ring (21) is attached to the surface of the plurality of threaded sleeves (18), the driving ring (21) is used for driving the plurality of threaded sleeves (18) to rotate, and a plurality of driving grooves (22) are formed on the surface of the driving ring (21).

7. The ultra-high pressure casing head with detachable function according to claim 6, characterized in that: A plurality of triangular limiting grooves (23) are formed on the side surface of the driving ring (21), a recess (24) is formed on the surface of the sleeve body (1), a limiting rod (25) is elastically slidably connected in the recess (24), the upper end of the limiting rod (25) extends into the limiting groove (23), and one side of the limiting rod (25) is inclined.

8. The ultra-high pressure casing head with detachable function according to claim 2, characterized in that: An annular extrusion ring (26) is slidably connected to the bottom of the first sliding groove (11), the extrusion ring (26) is soft and elastic, and a third connecting rod (27) which is retractable is connected between the clamping block (12) and the extrusion ring (26).

9. The ultra-high pressure casing head with detachable function according to claim 2, characterized in that: A guide ring (28) is fixedly connected to the bottom of the fixing ring (6), and the bottom of the guide ring (28) is inclined.

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