Anti-rotation insertion type float shoe

Abstract

The application discloses an anti-rotation plug-in type floating shoe, which comprises a floating shoe body in a cylindrical structure, an anti-rotation plug coaxially arranged in the floating shoe body, a plug-in guide pipe coaxially connected to the bottom of the anti-rotation plug, a valve core assembly coaxially connected to the bottom of the plug-in guide pipe, and filling material filled between the floating shoe body and the anti-rotation plug, the plug-in guide pipe and the valve core assembly. An anti-rotation plug groove is arranged on the inner wall of the anti-rotation plug, and a sleeve rubber plug can be tightly plug-in matched with the anti-rotation plug groove. The inner diameter of the plug-in guide pipe is equal to the inner diameter of the lower port of the anti-rotation plug, and an injection head can pass through the anti-rotation plug and be tightly plug-in matched with the plug-in guide pipe. The application can improve the universality of the floating shoe, reduce the design cost and facilitate management and maintenance.

Description

Technical Field

[0001] This invention belongs to the field of floating shoe technology, specifically relating to an anti-rotation insertion floating shoe. Background Technology

[0002] Currently, marine oil and gas resources are not only abundant, but modern science and technology have also given us the enormous capacity to develop them. The marine oil and gas industry has developed into a leading emerging industry with high output value in the marine economy.

[0003] Currently used floating shoes commonly employ two types of structures: anti-rotation floating shoes and insert-type floating shoes. However, due to the different designs of the anti-rotation and insert structures, these two types of floating shoes cannot be used interchangeably. They require separate design, processing, construction, and management, which increases the design cost and the complexity of management and maintenance, and thus needs improvement. Summary of the Invention

[0004] In order to solve all or some of the above problems, the purpose of this invention is to provide an anti-rotation insertion floating shoe, which can improve the versatility of the floating shoe, reduce design costs, and facilitate management and maintenance.

[0005] This invention provides an anti-rotation insertion floating shoe, comprising: The floating shoe itself has a cylindrical structure; An anti-rotation plug is coaxially disposed within the floating shoe body; A connecting tube is coaxially connected to the bottom of the anti-rotation plug; The valve core assembly is coaxially connected to the bottom of the insertion conduit; Filler material is used to fill the space between the float shoe body and the anti-rotation plug, the insertion conduit and the valve core assembly; The anti-rotation plug has an anti-rotation slot on its inner wall, and the sleeve plug can be tightly inserted into the anti-rotation slot. The inner diameter of the insertion conduit is equal to the inner diameter of the lower port of the anti-rotation plug, and the injection head can pass through the anti-rotation plug and be tightly inserted into the insertion conduit.

[0006] Optionally, the anti-rotation slot is configured as a petal groove or a toothed groove.

[0007] Optionally, a positioning ring is coaxially provided at the bottom of the anti-rotation plug, and a positioning groove is provided at the top of the insertion conduit for the positioning ring to be tightly inserted and fitted.

[0008] Optionally, the valve core assembly includes: Two check valves are provided, and they are arranged coaxially. A connecting cylinder is coaxially disposed between the two check valves and is connected to the two check valves respectively; The two check valves are used to restrict the liquid medium to flow only from top to bottom.

[0009] Optionally, the bottom of the insertion conduit is provided with a first shoulder groove, and the top of the one-way valve located above the connecting cylinder is tightly inserted into the first shoulder groove.

[0010] Optionally, a second shoulder groove is provided at the top of the connecting cylinder, and the bottom of the one-way valve located above the connecting cylinder is tightly inserted into the second shoulder groove.

[0011] Optionally, a third shoulder groove is provided at the bottom of the connecting cylinder, and the top of the one-way valve located below the connecting cylinder is tightly inserted into the third shoulder groove.

[0012] Optionally, the one-way valve is configured as a shuttle check valve.

[0013] Optionally, the top of the floating shoe body is provided with a welding surface for welding and fixing with the sleeve.

[0014] Optionally, the welding surface has an inclination angle of 20-40°.

[0015] As can be seen from the above technical solution, the anti-rotation insertion floating shoe provided by the present invention has the following advantages: This anti-rotation insert-type float shoe can be used with both the anti-rotation plug of the sleeve and the insert-type of the injection head, satisfying both anti-rotation and insert-type connections. This improves the versatility of the float shoe, reduces design costs, and facilitates management and maintenance.

[0016] Other features and advantages of the present invention will be set forth in the following description. Attached Figure Description

[0017] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the technical solutions of the present invention, and do not constitute a limitation on the technical solutions of the present invention.

[0018] Figure 1 This is a cross-sectional view of the anti-rotation insertable floating shoe in an embodiment of the present invention; Figure 2 This is a cross-sectional view of the anti-rotation plug and the insertion conduit in an embodiment of the present invention; Figure 3 This is a cross-sectional view of the valve core assembly in an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures: 1. Float shoe body; 2. Anti-rotation plug; 3. Connecting conduit; 4. Valve core assembly; 41. Check valve; 42. Connecting cylinder; 5. Filling material; 6. Anti-rotation slot; 7. Positioning ring; 8. Positioning groove; 9. First shoulder groove; 10. Second shoulder groove; 11. Third shoulder groove; 12. Welding surface. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be arbitrarily combined with each other.

[0021] like Figure 1 , Figure 2 , Figure 3 The illustration shows an embodiment of the present invention, which discloses an anti-rotation insertable float shoe, including a float shoe body 1, an anti-rotation plug 2, a connecting conduit 3, a valve core assembly 4, and a filling material 5. The float shoe body 1 has a cylindrical structure. The anti-rotation plug 2, the connecting conduit 3, and the valve core assembly 4 are connected sequentially from top to bottom and coaxially disposed within the float shoe body 1. The filling material 5 is filled between the float shoe body 1 and the anti-rotation plug 2, the connecting conduit 3, and the valve core assembly 4 to fix the anti-rotation plug 2, the connecting conduit 3, and the valve core assembly 4.

[0022] In one embodiment, such as Figure 1 , Figure 2 As shown, the inner wall of the anti-rotation plug 2 is provided with an anti-rotation slot 6, and the sleeve plug can be tightly inserted into the anti-rotation slot 6. At the same time, the inner diameter of the insertion conduit 3 is equal to the inner diameter of the lower port of the anti-rotation plug 2, and the injection head can pass through the anti-rotation plug 2 and be tightly inserted into the insertion conduit 3.

[0023] The anti-rotation insert-type float shoe in this embodiment can be used with both the anti-rotation plug of the sleeve and the insert-type of the injection head, satisfying both anti-rotation and insert-type connections, thereby improving the versatility of the float shoe, reducing design costs, and facilitating management and maintenance.

[0024] In this embodiment, the filling material 5 is cement sand and gravel. In other embodiments, other materials may also be used, which will not be listed in detail here.

[0025] In one embodiment, such as Figure 1 , Figure 2 As shown, the anti-rotation slot 6 is configured as a petal groove or a toothed groove. In this embodiment, the anti-rotation slot 6 is preferably a petal groove. Compared with the traditional symmetrical tooth structure, it can better achieve the functions of anti-rotation and anti-slippage, improve the directional and anti-torsion performance of the rubber plug, and perform better in complex well conditions.

[0026] In one embodiment, such as Figure 1 , Figure 2 As shown, the bottom of the anti-rotation plug 2 is coaxially integrally formed with a positioning ring 7, and the top of the insertion conduit 3 is provided with a positioning groove 8 for the positioning ring 7 to be tightly inserted and fitted, so as to realize the installation positioning, facilitate the quick assembly of the two parts by the staff, and also improve the sealing effect.

[0027] In one embodiment, such as Figure 1 , Figure 3 As shown, the valve core assembly 4 includes two check valves 41, which are coaxially arranged one above the other. The connecting cylinder 42 is coaxially positioned between the two check valves 41, with each end of the connecting cylinder 42 connected to the corresponding check valve 41. The two check valves 41 are used to restrict the flow of the liquid medium to only from top to bottom.

[0028] To address issues such as mud backflow and differential pressure backflush during cementing, a two-stage check valve structure is adopted to improve check valve performance and sealing reliability. Furthermore, this design can be flexibly adjusted according to well conditions, requiring only a change in valve body specifications to meet different pressure levels and flow rate scenarios.

[0029] In one embodiment, such as Figure 2 , Figure 3 As shown, the bottom of the insertion conduit 3 is provided with a first shoulder groove 9, and the top of the one-way valve 41 located above the connecting cylinder 42 is tightly inserted into the first shoulder groove 9. The top of the connecting cylinder 42 is provided with a second shoulder groove 10, and the bottom of the one-way valve 41 located above the connecting cylinder 42 is tightly inserted into the second shoulder groove 10. The bottom of the connecting cylinder 42 is provided with a third shoulder groove 11, and the top of the one-way valve 41 located below the connecting cylinder 42 is tightly inserted into the third shoulder groove 11.

[0030] In this embodiment, the one-way valve 41 is a shuttle check valve. In other embodiments, other types such as axial flow check valves can also be used. Meanwhile, the anti-rotation plug 2, the insertion conduit 3, the one-way valve 41, and the connecting cylinder 42 are respectively fitted with interference fits or snap-fit ​​joints to ensure the connection stability between the components and improve the sealing effect.

[0031] In one embodiment, such as Figure 1 As shown, the top of the floating shoe body 1 is provided with a welding surface 12 for welding and fixing with the sleeve, and the welding surface 12 has an inclination angle of 20-40°. In this embodiment, the inclination angle of the welding surface 12 is 30°, that is, the angle between the welding surface 12 and the horizontal plane is 30°.

[0032] By setting the inclined welding surface 12, the release of welding stress can be effectively guided, avoiding weld fatigue or cracking caused by stress concentration, while improving the stress rationality and service life of the overall floating shoe structure.

[0033] As described above, this floating shoe, at the construction level, achieves dual functionality with a unified interface and universal structure, solving the problem of rework or underground accidents caused by mismatched floating shoe types in traditional operations, significantly improving construction efficiency and reducing safety risks. Simultaneously, at the manufacturing management level, the modular design simplifies production processes, standardizes processing procedures, materials, and molds, reduces product models, facilitates mass production and inventory management, and effectively reduces enterprise operating costs.

[0034] In addition, in terms of performance, it has a compact structure and high strength, making it suitable for complex well conditions such as deep wells and horizontal wells. The dual-stage check valve enhances the check valve capability, and the interlocking positioning between the components resists downhole vibration and torque, ensuring cementing quality and wellbore integrity.

[0035] It should be noted that, unless otherwise stated, the technical or scientific terms used in this invention should have the ordinary meaning as understood by one of ordinary skill in the art.

[0036] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly defined.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A type of anti-rotation insertion floating shoe, characterized in that, include: The floating shoe body (1) has a cylindrical structure; The anti-rotation plug (2) is coaxially disposed inside the floating shoe body (1); Insert the conduit (3), which is coaxially connected to the bottom of the anti-rotation plug (2); The valve core assembly (4) is coaxially connected to the bottom of the insertion conduit (3); Filler (5) is filled between the float shoe body (1) and the anti-rotation plug (2), the insertion conduit (3) and the valve core assembly (4); The inner wall of the anti-rotation plug (2) is provided with an anti-rotation slot (6), and the sleeve plug can be tightly inserted into the anti-rotation slot (6). The inner diameter of the insertion conduit (3) is equal to the inner diameter of the lower port of the anti-rotation plug (2), and the injection head can pass through the anti-rotation plug (2) and be tightly inserted into the insertion conduit (3). The valve core assembly (4) includes: Two check valves (41) are coaxially arranged. The connecting cylinder (42) is coaxially disposed between the two check valves (41) and is connected to the two check valves (41) respectively; Among them, the two one-way valves (41) are used to restrict the liquid medium to flow only from top to bottom; The bottom of the insertion conduit (3) is provided with a first shoulder groove (9), and the top of the one-way valve (41) located above the connecting cylinder (42) is tightly inserted into the first shoulder groove (9). The top of the connecting cylinder (42) is provided with a second shoulder groove (10), and the bottom of the one-way valve (41) located above the connecting cylinder (42) is tightly inserted into the second shoulder groove (10).

2. The anti-rotation insertion floating shoe according to claim 1, characterized in that, The anti-rotation slot (6) is configured as a petal slot or a toothed slot.

3. The anti-rotation insertion floating shoe according to claim 1, characterized in that, The bottom of the anti-rotation plug (2) is coaxially provided with a positioning ring (7), and the top of the insertion conduit (3) is provided with a positioning groove (8) for the positioning ring (7) to be tightly inserted and fitted.

4. The anti-rotation insertion floating shoe according to claim 1, characterized in that, The bottom of the connecting cylinder (42) is provided with a third shoulder groove (11), and the top of the one-way valve (41) located below the connecting cylinder (42) is tightly inserted into the third shoulder groove (11).

5. The anti-rotation insertion floating shoe according to claim 1, characterized in that, The one-way valve (41) is configured as a shuttle check valve.

6. The anti-rotation insertion floating shoe according to claim 1, characterized in that, The top of the floating shoe body (1) is provided with a welding surface (12) for welding and fixing with the sleeve.

7. The anti-rotation insertion floating shoe according to claim 6, characterized in that, The tilt angle of the welding surface (12) is 20-40°.

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