A convenient to disassemble Christmas tree plug structure

Abstract

The utility model discloses a kind of oil tree plug structure convenient to dismount, including plug and plug cover, the end of plug cover away from plug is sequentially connected with rotating rod and end plate, the outer wall of the section of rotating rod close to plug cover is evenly provided with several radial protruding protrusions one along circumference, recess one is formed between adjacent protrusions one, rotating sleeve is sleeved on the rotating rod, corresponding each protrusion one is equipped with the recess two of compatible on the inner wall of this rotating sleeve, recess two between adjacent is formed with the protrusion two of compatible recess one. The utility model is designed by rotating rod and rotating sleeve cooperation, so that operator uses spanner to hold rotating sleeve to drive plug to rotate a certain angle, without taking spanner from rotating sleeve, only needs to slightly move rotating sleeve along axial direction, make it and the driving protrusion of rotating rod disengage and slide to bare pole section, it can freely rotate spanner, then rotating sleeve slides back and engages with protrusion again, continue to screw the next stroke, reduce the frequency of frequent clamping, disengaging times between spanner and plug.

Description

Technical Field

[0001] This utility model relates to the field of oilfield production equipment technology, and in particular to a tree trunk plug structure that is easy to disassemble and assemble. Background Technology

[0002] The Christmas tree is a key surface piece of equipment for oil and gas well production, and its plugs are used to seal various process interfaces. Currently, Christmas tree plugs are mostly of hexagonal or square head structure, which are large in size and weight, and are usually installed on an operating platform several meters high. Operators need to use scaffolding or the operating platform and large wrenches (such as F wrenches and box wrenches) to install and remove them.

[0003] However, on elevated platforms, the unstable standing posture of personnel makes it difficult to apply sufficient torque. The range of motion of the wrench is often limited by surrounding pipelines and structures, preventing large-amplitude continuous rotation. After each turn, the wrench interferes with surrounding components, requiring removal from the plug, rotation, and re-locking before force can be applied again. This method is inefficient, labor-intensive, and prone to slippage during frequent clamping, posing a safety hazard of tool damage or personnel injury.

[0004] To address this issue, we propose a tree trunk plug structure that is easy to install and disassemble. Utility Model Content

[0005] The purpose of this invention is to provide an easy-to-disassemble and assemble oil wellhead wire plug structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An easy-to-assemble and disassemble tree fiber plug structure includes a plug head and a plug cap. The end of the plug cap away from the plug head is connected in sequence to a rotating rod and an end plate. On the outer wall of the section of the rotating rod near the plug cap, there are several radially protruding protrusions I evenly arranged along the circumference. A groove I is formed between adjacent protrusions I. A rotating sleeve is sleeved on the rotating rod. On the inner wall of the rotating sleeve, there is a matching groove II corresponding to each protrusion I. A protrusion II that matches the groove I is formed between adjacent groove II.

[0008] In a further embodiment, both the end plate and the rotating sleeve adopt an external hexagonal structure.

[0009] In a further embodiment, the distance between the front end face of the first protrusion and the rear end face of the end plate is greater than the thickness of the rotating sleeve.

[0010] In a further embodiment, each outer surface of the rotating sleeve is provided with a plurality of anti-slip ridges parallel to the axial direction, and the outer edges of both ends of the rotating sleeve are provided with a radially protruding rim.

[0011] In a further embodiment, a dust cover is also included, which covers the entire periphery of the rotating rod, end plate, and rotating sleeve.

[0012] In a further embodiment, the open end of the dust cover is provided with a ramp section, the inner wall of which is inlaid with an O-ring, and the outer edge of the plug is provided with a ramp edge that matches the ramp section.

[0013] In a further embodiment, a protruding shank is fixed at the center of the outer end face of the dust cover, and a stud is fixed at the center of the inner end face of the dust cover. A screw hole adapted to the stud is opened at the center of the outer end face of the end plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention utilizes a rotating rod and rotating sleeve design, allowing the operator to use a wrench to hold the rotating sleeve and drive the plug to rotate a certain angle. Without removing the wrench from the rotating sleeve, the operator only needs to slightly move the rotating sleeve axially to disengage it from the driving protrusion of the rotating rod and slide it to the smooth rod section. This allows the operator to freely rotate the wrench to the initial comfortable angle. Then, the rotating sleeve is slid back to engage with the protrusion again, continuing the next stroke of tightening. This eliminates the time-consuming and laborious repeated clamping steps of traditional operations, reduces the frequent jamming and disengagement between the wrench and the plug, making the operation process continuous and smooth, and significantly improving assembly and disassembly efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention when the rotating sleeve is located outside the protrusion;

[0017] Figure 2 This is a schematic diagram of the structure of this utility model when the rotating sleeve is located outside the smooth rod of the rotating rod;

[0018] Figure 3 This is a schematic diagram of the rotating sleeve structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the assembly structure of the dust cover and the present invention in half-section.

[0020] In the diagram: 1. Plug; 2. Cap; 21. Ramp edge; 3. Rotating rod; 31. Protrusion 1; 32. Groove 1; 4. End plate; 41. Screw hole; 5. Rotating sleeve; 51. Groove 2; 52. Protrusion 2; 53. Anti-slip texture; 54. Raised edge; 6. Dust cover; 61. Ramp section; 62. O-ring; 63. Stud; 64. Raised shank. Detailed Implementation

[0021] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] 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.

[0024] Please see Figure 1-4 A type of easy-to-assemble and disassemble tree trunk plug structure mainly includes a plug 1 and a plug 2. The plug 1 is a cylinder with external threads, used to screw into the interface of the tree trunk body. The plug 2 is welded or integrally forged to the end of the plug 1. The outer edge of the plug 2 is machined with a beveled edge 21.

[0025] A rotating rod 3 is welded or integrally forged at the center of the end of the plug 2 away from the plug 1. On the outer wall of the section of the rotating rod 3 near the plug 2, several radially protruding protrusions 31 are uniformly machined along the circumference. A groove 32 is formed between adjacent protrusions 31. The cross-section of the protrusions 31 is preferably rectangular or trapezoidal. The remaining part of the rotating rod 3 is a smooth cylindrical section. An end plate 4 is welded or machined at the end of the rotating rod 3 away from the plug 2. The end plate 4 is preferably an external hexagonal structure, and a screw hole 41 is opened at the center of its outer end face.

[0026] A rotating sleeve 5 is sleeved on the outside of the rotating rod 3. The rotating sleeve 5 can slide along the axis of the rotating rod 3 and rotate around it. On the inner wall of the rotating sleeve 5, there is a groove 51 with a matching shape corresponding to the position of each protrusion 31. Between adjacent grooves 31, a protrusion 52 that matches the groove 32 is formed. Specifically, the distance between the front end face of the protrusion 31, i.e. the face near the end plate 4, and the rear end face of the end plate 4 should be greater than the axial thickness of the rotating sleeve 5. When the rotating sleeve 5 slides to the limit position in the direction of the plug 2, the protrusion 52 on its inner wall can be inserted into the groove 32 of the rotating rod 3. At the same time, the protrusion 31 of the rotating rod 3 is inserted into the groove 51 of the rotating sleeve 5, thereby realizing the circumferential engagement of the two, so that the rotating sleeve 5 can drive the rotating rod 3 and the entire plug to rotate synchronously. When the rotating sleeve 5 slides to the smooth rod section in the direction of the end plate 4, the protrusion 52 on its inner wall only contacts the surface of the smooth rod. At this time, the rotating sleeve 5 can rotate freely relative to the rotating rod 3.

[0027] The rotating sleeve 5 is preferably hexagonal in shape to facilitate clamping of standard wrenches and to make it easier to compare with the hexagonal shape of the end plate 4. Angle adjustment is also more convenient. To further enhance the operating feel, several axial anti-slip ridges 53 can be machined on each outer side of the rotating sleeve 5, and a raised edge 54 can be added to the outer edge of both end faces to reduce the possibility of the wrench slipping off the rotating sleeve 5.

[0028] In addition, during actual production and processing, a nickel-based composite coating can be plated on the contact surfaces of the rotating sleeve 5 and the rotating rod 3. This coating not only has high hardness but also low friction and high wear resistance, making the operation between the rotating sleeve 5 and the rotating rod 3 smoother.

[0029] To protect the internal mechanism, a dust cover 6 can be installed, which covers the outer perimeter of the rotating rod 3, end plate 4, and rotating sleeve 5. The open end of the dust cover 6, that is, the end closest to the plug 2, has an enlarged inner diameter to form a ramp section 61, in which an O-ring 62 is embedded. During installation, the ramp section 61 mates with the ramp edge 21 of the plug 2, and the O-ring 62 achieves a seal. A stud 63 is fixed at the center of the inner end face of the dust cover 6, that is, the end away from the plug 2, and can be fixed by screwing it into the screw hole 41 of the end plate 4. A protruding handle 64 can be fixed at the center of the outer end face of the dust cover 6 to facilitate the disassembly of the dust cover 6.

[0030] Workflow: During installation, first screw the plug 1 into the designated interface of the tree until it is initially in place. The operator uses a wrench to clamp the outer hexagonal part of the rotating sleeve 5 and pushes the wrench and rotating sleeve 5 towards the plug cap 2, so that the second protrusion 52 on the inner wall of the rotating sleeve 5 engages with the first groove 32 of the rotating rod 3, and the first protrusion 31 engages with the second groove 51. Turn the wrench clockwise, and the engaging protrusions and grooves will drive the rotating rod 3 and the entire plug to rotate until the wrench's stroke is limited. Gently push the wrench towards end plate 4 to move the rotating sleeve 5 to the smooth section of the rotating rod 3. At this time, the rotating sleeve 5 can rotate freely. Keep the wrench in the clamping state and rotate it back to the next comfortable initial angle. Then push the wrench and rotating sleeve 5 towards the plug 2 to complete the engagement. Then turn the wrench clockwise until the plug is completely tightened. Finally, screw the stud 63 of the dust cover 6 into the screw hole 41 of the end plate 4 to fix it, ensuring that the O-ring 62 is pressed tightly and sealed with the slope edge 21 of the plug 2.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A tree trunk plug structure that is easy to assemble and disassemble, comprising a plug (1) and a plug cap (2), characterized in that: The end of the plug (2) away from the plug (1) is connected in sequence to a rotating rod (3) and an end plate (4). The outer wall of the rotating rod (3) near the plug (2) is provided with a number of radially protruding protrusions (31) evenly distributed along the circumference. A groove (32) is formed between adjacent protrusions (31). The rotating rod (3) is fitted with a rotating sleeve (5). The inner wall of the rotating sleeve (5) is provided with a matching groove (51) corresponding to each protrusion (31). A protrusion (52) matching the groove (32) is formed between adjacent grooves (51).

2. The oil wellhead plug structure that is easy to assemble and disassemble according to claim 1, characterized in that: Both the end plate (4) and the rotating sleeve (5) adopt an external hexagonal structure.

3. The oil wellhead plug structure for easy assembly and disassembly according to claim 1, characterized in that: The distance between the front end face of the protrusion (31) and the rear end face of the end plate (4) is greater than the thickness of the rotating sleeve (5).

4. The oil wellhead plug structure that is easy to assemble and disassemble according to claim 1, characterized in that: Each outer side of the rotating sleeve (5) is provided with several anti-slip ridges (53) parallel to the axial direction, and the outer edges of both ends of the rotating sleeve (5) are provided with a ring of radially protruding ridges (54).

5. The oil wellhead plug structure that is easy to assemble and disassemble according to claim 1, characterized in that: It also includes a dust cover (6), which covers the outside of the rotating rod (3), end plate (4) and rotating sleeve (5).

6. The oil wellhead plug structure for easy assembly and disassembly according to claim 5, characterized in that: The dust cover (6) has a ramp section (61) at its open end. An O-ring (62) is embedded in the inner wall of the ramp section (61). The outer edge of the plug (2) has a ramp edge (21) that matches the ramp section (61).

7. The oil wellhead plug structure for easy assembly and disassembly according to claim 5, characterized in that: The dust cover (6) has a protruding shank (64) fixed at the center of its outer end face, and a stud (63) fixed at the center of its inner end face. The end plate (4) has a screw hole (41) at the center of its outer end face that is compatible with the stud (63).

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