Improved simple casing head device for oil drilling

Abstract

The utility model belongs to the technical field of petroleum drilling casing head, and disclose petroleum drilling improves novel simple and easy casing head device, including fixed pipe, the top fixed mounting of fixed pipe has the connecting assembly, the outside movable mounting of fixed pipe has the casing assembly, the fixed pipe includes the pipe body, the outside of pipe body is located and is equipped with the sliding slot, the casing assembly includes the sliding block, the inside of sliding block movable joint in the sliding slot, the inside fixed connection of sliding block has the clamping plate in the inside of pipe body, the outside of pipe body is developed and is provided with the outer thread, the outer thread is connected with the movable sleeve in the outside screw thread of sliding block top, the movable sleeve bottom movable joint has the abutment ring, the utility model discloses through the movable sleeve through the thread connection, through the rotation movable sleeve makes it along the pipe body drop, drives the abutment ring to remove, makes the sliding block slide in the sliding slot, the clamping plate clamps the casing, guarantees the fixed effect, the operation movable sleeve can adjust multiple sliding blocks, improves the operation convenience and the practicality.

Description

Technical Field

[0001] This utility model belongs to the field of oil drilling casing head technology, specifically an improved and simplified casing head device for oil drilling. Background Technology

[0002] The casing head is an important connecting component between the casing and the wellhead equipment. Its lower end is connected to the surface casing by threads, and its upper end is connected to the wellhead equipment or blowout preventer by flanges or clamps. It is used to suspend the casing layers other than the surface casing and to seal the wellhead equipment components in the casing annular space.

[0003] The existing patent publication number CN213478282U3 discloses a new type of simple sleeve head, which is composed of a through hole, a rotating rod, a connecting rod, a fixing plate, a hinge rod, a moving block, a threaded rod, a support block and a threaded hole to form a connecting mechanism, which can fix the sleeve, with good fixing effect, the sleeve is not easy to shake or slide, it is practical and easy to promote;

[0004] In the aforementioned patent, the distance between the fixing plates is adjusted by rotating the threaded rod to clamp and fix the sleeve by rotating the connecting rod around the rotating rod. However, the two threaded rods need to be operated independently to ensure that the sleeve is clamped in the center, which is cumbersome to operate and inconvenient to use. At the same time, the moving block drives the T-shaped slider to slide up and down in the T-shaped groove. The weight acts on the threaded rod, which can easily cause the threaded rod to rotate, which can easily affect the clamping stability.

[0005] Therefore, an improved, simplified casing head device for oil drilling is proposed to solve the above problems. Utility Model Content

[0006] To achieve the above objectives, this utility model provides the following technical solution: an improved simple casing head device for oil drilling, comprising a fixed pipe, a connecting component fixedly installed on the top of the fixed pipe, and a casing component movably installed on the outside of the fixed pipe;

[0007] The fixed tube includes a tube body, and a groove is provided on the outer side of the tube body;

[0008] The sleeve assembly includes a slider that is movably engaged inside a groove. A clamping plate located inside the tube body is fixedly connected to the inner side of the slider. The tube body has an external thread, and a movable sleeve located above the slider is connected to the external thread of the external thread. A stop ring is movably engaged at the bottom of the movable sleeve, and the stop ring abuts against the outer side of the slider.

[0009] In the above technical solution, preferably, the connecting assembly includes a sleeve female coupling fixedly connected to the top of the fixed pipe, a two-lobed suspension steel plate is movably engaged inside the sleeve female coupling, a sealing rubber ring is movably engaged above the two-lobed suspension steel plate, a sealing fixing pressure plate is movably engaged above the sealing rubber ring, a thread adapted to the sleeve female coupling is provided on the outer side of the sealing fixing pressure plate, the sealing fixing pressure plate is threadedly connected to the inner side of the sleeve female coupling, and the sleeve female coupling is fixedly installed on the inner side of the sealing fixing pressure plate.

[0010] The beneficial effects of the above-mentioned further scheme are as follows: a sealing and fixing pressure plate is provided at the upper end of the two-lobed suspension steel plate, and a sealing rubber ring is provided between the two-lobed suspension steel plate and the sealing and fixing pressure plate. The sealing rubber ring is about 1cm thick, and the outer diameter of the sealing rubber ring is exactly the same as the annular size of the surface casing and the production casing. A special wrench is provided to rotate the sealing and fixing pressure plate, which makes it easy to fasten the sealing and fixing pressure plate into the female coupling of the surface casing. A wrench hole is provided in the sealing and fixing pressure plate for installation and removal. Compacting the sealing rubber ring achieves a better sealing effect, increases the wellhead sealing performance, and effectively increases the tightness of the connection between the production casing and the surface casing, thereby effectively improving the efficiency and quality of gas production.

[0011] In the above technical solution, preferably, the slider is arranged in an "I" shape to match the groove, the outer side of the slider is arranged in a downward transition slope, and the inner side of the abutment ring is arranged in a slope corresponding to the outer side of the slider.

[0012] The beneficial effects of the above-mentioned further solution are: the movement of the slider in the groove is more stable and less prone to deviation or shaking; the "I"-shaped structure increases the contact area between the slider and the groove, improving the stability of the connection; the slider can slide smoothly along the groove, thereby driving the clamping plate to clamp the sleeve, achieving a firm fixation of the sleeve head, enhancing the stability and fixing effect of the sleeve head, and also improving the convenience and practicality of operation; when the slider slides downward in the groove, its outer inclined surface will gradually contact the inner inclined surface of the abutment ring and generate pressure, thereby pushing the abutment ring to move towards the center; the inclined surface design also makes the contact between the slider and the abutment ring smoother, reducing friction and wear, extending the service life of the device, and at the same time enabling the slider to automatically adjust its position during sliding to ensure a tight fit with the abutment ring, improving the stability and reliability of the device.

[0013] In the above technical solution, preferably, the outer side of the movable sleeve is fixedly connected with an operating ear plate with an internal opening.

[0014] The beneficial effects of the above-mentioned further solutions are: the operating ear plate makes it easier for operators to use tools to rotate the movable sleeve, improving the flexibility and convenience of operation. By operating the ear plate, operators can easily control the rotation of the movable sleeve, greatly improving the ease of operation.

[0015] In the above technical solution, preferably, the slide groove and the slider are arranged in a horizontal annular equidistant manner, and a rubber pad is provided on the inner side of the clamping plate.

[0016] The beneficial effects of the above-mentioned further solution are: multiple sliders arranged in a ring at equal intervals can slide stably in the groove, clamping and fixing the sleeve from multiple directions, improving the stability and uniform force distribution of the device; the rubber pad further enhances the friction between the clamping plate and the clamped object, preventing the clamped object from sliding or loosening during the operation of the device, thereby improving the safety and reliability of the device.

[0017] In the above technical solution, preferably, a ring plate is fixedly connected to the upper part of the outer side of the tube body, and a slot is provided at the bottom of the ring plate and the top of the movable sleeve, and a support spring is movably engaged inside the slot.

[0018] The beneficial effects of the above-mentioned further solutions are: by setting the support spring, when the movable sleeve is rotating or performing other activities, the support spring can provide a certain elastic support force, making the movable sleeve more stable, reducing shaking and instability factors, and improving the versatility and practicality of the device.

[0019] In the above technical solution, preferably, the support spring is sleeved on the outside of the tube body.

[0020] The beneficial effects of the above-mentioned further solutions are: the support spring can provide stable elastic support force, and can also prevent the movable sleeve from detaching or misaligning during rotation or movement through the limiting effect of the slot, thereby further enhancing the stability and safety of the device.

[0021] In the above technical solution, preferably, the support spring is sleeved on the outside of the tube body.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0023] This utility model features a movable sleeve connected by threads. By rotating the movable sleeve, it descends along the tube body, causing the abutment ring to move and the slider to slide within the groove. The clamping plate secures the sleeve, ensuring a fixed effect. Multiple sliders can be adjusted by operating the movable sleeve, improving operational convenience and practicality.

[0024] The ring plate is located on the outside of the tube body and connected to the top of the external thread. The support spring is placed in the groove between the ring plate and the movable sleeve. The support spring applies pressure to the movable sleeve through deformation, while the thread engagement between the external thread and the movable sleeve ensures a firm connection, restricts the movement of the movable sleeve, and ensures stability. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0026] Figure 2 This is an exploded view of the connecting component of this utility model;

[0027] Figure 3 This is an exploded view of the sleeve assembly of this utility model;

[0028] Figure 4 This is a cross-sectional structural diagram of the present invention;

[0029] Figure 5 This is a schematic diagram of the structure and installation of the support spring of this utility model.

[0030] In the diagram: 1. Fixed pipe; 11. Pipe body; 12. Slide groove; 2. Connecting assembly; 21. Sleeve female coupling; 22. Two-lobed suspension steel plate; 23. Sealing rubber ring; 24. Sealing fixing pressure plate; 25. Thread; 26. Sleeve female coupling; 3. Sleeve assembly; 31. Slider; 32. Clamping plate; 33. External thread; 34. Movable sleeve; 35. Abutment ring; 36. Ring plate; 37. Slot; 38. Support spring. Detailed Implementation

[0031] 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.

[0032] like Figures 1-5 As shown, an improved simple casing head device for oil drilling includes a fixed pipe 1, a connecting assembly 2 fixedly installed on the top of the fixed pipe 1, and a casing assembly 3 movably installed on the outside of the fixed pipe 1. The fixed pipe 1 includes a pipe body 11, and a groove 12 is provided on the outer side of the pipe body 11. The casing assembly 3 includes a slider 31, which is movably engaged inside the groove 12. A clamping plate 32 located inside the pipe body 11 is fixedly connected to the inner side of the slider 31. An external thread 33 is provided on the outer side of the pipe body 11. A movable sleeve 34 located above the slider 31 is connected to the external thread of the external thread 33. A retaining ring 35 is movably engaged at the bottom of the movable sleeve 34 and abuts against the outer side of the slider 31.

[0033] The slider 31 is arranged in an "I" shape to match the groove 12. The outer side of the slider 31 is arranged with a downward transition slope, and the inner side of the abutment ring 35 is arranged with a slope corresponding to the outer side of the slider 31.

[0034] The outer side of the movable sleeve 34 is fixedly connected to an operating ear plate with an internal opening.

[0035] The slide groove 12 and the slider 31 are arranged in a horizontal ring at equal intervals, and a rubber pad is provided on the inner side of the clamping plate 32.

[0036] In use, a tool is inserted into the operating ear plate on the outside of the movable sleeve 34 and rotated. The movable sleeve 34 is threaded to the outside of the external thread 33. As the movable sleeve 34 rotates, it moves downward along the outside of the tube body 11. The movable sleeve 34 drives the abutment ring 35 to move downward, so that the inner side of the abutment ring 35 abuts against the outer inclined surface of the slider 31. As the abutment ring 35 moves downward, it abuts the slider 31 to slide inward along the slide groove 12, so that the clamping plate 32 on the inner side of the slider 31 contacts the sleeve from the side to clamp and fix the sleeve, ensuring the fixing effect. By operating the movable sleeve 34, the movement of the sliders 31 in multiple slide grooves 12 can be adjusted simultaneously.

[0037] Currently, due to the high cavity ratio and limited fixed contact surface between the production casing and the surface casing, the wellhead stability, the stable encapsulation of the production casing, and the annular sealing performance are not ideal. Therefore, the following technical solution is provided:

[0038] The connecting assembly 2 includes a sleeve female coupling 21 fixedly connected to the top of the fixed pipe 1. A two-lobed suspension steel plate 22 is movably engaged inside the sleeve female coupling 21. A sealing rubber ring 23 is movably engaged above the two-lobed suspension steel plate 22. A sealing fixing pressure plate 24 is movably engaged above the sealing rubber ring 23. A thread 25 adapted to the sleeve female coupling 21 is provided on the outside of the sealing fixing pressure plate 24. The sealing fixing pressure plate 24 is threadedly connected to the inside of the sleeve female coupling 21. A sleeve female coupling 26 is fixedly installed on the inside of the sealing fixing pressure plate 24.

[0039] The installation is completed by inserting the two-lobed suspension steel plate 22 into the sleeve female coupling 21 and setting the sealing rubber ring 23 above the two-lobed suspension steel plate 22, and then fastening the sealing fixing plate 24 into the sleeve female coupling 21 with the thread 25 to press the sealing rubber ring 23.

[0040] like Figure 1 , Figure 4 and Figure 5 As shown, an improved simple casing head device for oil drilling includes a fixed pipe 1, a connecting assembly 2 fixedly installed on the top of the fixed pipe 1, and a casing assembly 3 movably installed on the outside of the fixed pipe 1. The fixed pipe 1 includes a pipe body 11, and a groove 12 is provided on the outer side of the pipe body 11. The casing assembly 3 includes a slider 31, which is movably engaged inside the groove 12. A clamping plate 32 located inside the pipe body 11 is fixedly connected to the inner side of the slider 31. An external thread 33 is provided on the outer side of the pipe body 11. A movable sleeve 34 located above the slider 31 is connected to the external thread of the external thread 33. A retaining ring 35 is movably engaged at the bottom of the movable sleeve 34 and abuts against the outer side of the slider 31.

[0041] A ring plate 36 is fixedly connected to the upper outer side of the tube body 11. The bottom of the ring plate 36 and the top of the movable sleeve 34 are both provided with slots 37. A support spring 38 is movably engaged inside the slots 37.

[0042] The support spring 38 is sleeved on the outside of the tube body 11.

[0043] The working principle and usage process of this utility model are as follows: The ring plate 36 is connected to the uppermost position of the external thread 33 on the outside of the tube body 11. The support spring 38 is locked in the groove 37 between the ring plate 36 and the movable sleeve 34. The elastic force generated by the deformation of the support spring 38 applies a downward force to the movable sleeve 34. The threaded connection between the external thread 33 and the movable sleeve 34 ensures the tightness of the connection, reduces the movement of the movable sleeve 34, and thus ensures the stability of the movable sleeve 34.

[0044] In this embodiment, the ring plate 36 is located at the uppermost position of the external thread 33, and the support spring 38 is locked below the ring plate 36. Sufficient space is left between the ring plate 36 and the movable sleeve 34 for the spring support spring 38 to be compressed and released, ensuring that the spring support spring 38 can be smoothly compressed and released during the operation of the device, and maintaining a stable connection between the internal components of the device.

[0045] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An improved, simplified casing head device for oil drilling, comprising a fixed pipe (1), characterized in that, A connecting assembly (2) is fixedly installed on the top of the fixed tube (1), and a sleeve assembly (3) is movably installed on the outside of the fixed tube (1). The fixed tube (1) includes a tube body (11), and a groove (12) is provided on the outer side of the tube body (11); The sleeve assembly (3) includes a slider (31), which is movably engaged inside the slide groove (12). A clamping plate (32) located inside the tube body (11) is fixedly connected to the inner side of the slider (31). An external thread (33) is provided on the outer side of the tube body (11). The external thread of the external thread (33) is connected to a movable sleeve (34) located above the slider (31). A stop ring (35) is movably engaged at the bottom of the movable sleeve (34). The stop ring (35) abuts against the outer side of the slider (31).

2. The improved simplified casing head device for oil drilling according to claim 1, characterized in that, The connecting assembly (2) includes a sleeve female coupling (21) fixedly connected to the top of the fixed pipe (1). A two-lobed suspension steel plate (22) is movably engaged inside the sleeve female coupling (21). A sealing rubber ring (23) is movably engaged above the two-lobed suspension steel plate (22). A sealing fixing pressure plate (24) is movably engaged above the sealing rubber ring (23). A thread (25) adapted to the sleeve female coupling (21) is provided on the outside of the sealing fixing pressure plate (24). The sealing fixing pressure plate (24) is threadedly connected to the inside of the sleeve female coupling (21). A sleeve female coupling (26) is fixedly installed on the inside of the sealing fixing pressure plate (24).

3. The improved simplified casing head device for oil drilling according to claim 1, characterized in that, The slider (31) is arranged in an "I" shape to match the groove (12). The outer side of the slider (31) is arranged with a downward transition slope. The inner side of the abutment ring (35) is arranged with a slope corresponding to the outer side of the slider (31).

4. The improved simplified casing head device for oil drilling according to claim 1, characterized in that, The outer side of the movable sleeve (34) is fixedly connected to an operating ear plate with an internal opening.

5. The improved simplified casing head device for oil drilling according to claim 2, characterized in that, The slide groove (12) and the slider (31) are arranged in a horizontal ring at equal intervals, and a rubber pad is provided on the inner side of the clamping plate (32).

6. The improved simplified casing head device for oil drilling according to claim 1, characterized in that, A ring plate (36) is fixedly connected to the upper part of the outer side of the tube body (11). The bottom of the ring plate (36) and the top of the movable sleeve (34) are provided with slots (37). A support spring (38) is movably engaged inside the slot (37).

7. The improved simplified casing head device for oil drilling according to claim 6, characterized in that, The support spring (38) is sleeved on the outside of the tube (11).

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