Oil exploration geosteering drill collar connection sealing element
By combining a metal sealing ring with an elastic sealing element, a double sealing structure is formed, which solves the problem of easy failure of traditional sealing solutions and achieves stable sealing and efficient drilling in oil exploration.
Patent Information
- Application Number
- CN202520358427.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-03-03
AI Technical Summary
Traditional sealing solutions are prone to failure in oil exploration, which slows down the drilling process and consumes a lot of manpower and resources to replace the seals.
A dual-seal structure is formed by combining a metal sealing ring and an elastic sealing element. The high temperature and high pressure resistance of the metal sealing ring and the multiple sealing design of the elastic sealing element enhance the sealing effect. The positioning plate and guide groove guide the elastomer to achieve precise sealing.
It effectively prevents drilling fluid leakage, ensures stable sealing of the geological steering mechanism in harsh environments, reduces leakage risk, extends service life, and reduces maintenance costs.
Smart Images
Figure CN223754025U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of oil and natural gas exploitation, and specifically relates to an oil exploration geosteering drill collar connecting sealing element. BACKGROUND
[0002] In the field of oil exploration, the geosteering mechanism is the core element for realizing accurate drilling and efficient development of oil and gas resources, especially in complex and changeable stratum environments, the role of the geosteering mechanism is increasingly prominent, and the geosteering mechanism is like an "intelligent navigator" in the well, which guides the drill bit to pass through complex strata along an ideal track and reach an oil and gas enrichment area by means of various advanced sensors, however, the normal operation of this precision system is highly dependent on the drill collar assembly closely connected thereto, especially the cooperative matching of the first drill collar and the second drill collar.
[0003] In retrospect of past oil exploration practices, it is not difficult to find that when dealing with the sealing requirement of the connecting part of the first drill collar and the second drill collar, the conventional sealing scheme has obvious limitations, and a conventional rubber metal sealing ring is usually matched with a basic threaded connection structure to realize the sealing function, when facing the complex working conditions continuously expanded by oil exploration, the sealing failure problem is prone to occur, such as the metal sealing ring can be replaced only by tripping in and out of the drill string. A large amount of manpower, material resources and precious time are consumed, and the exploration process is seriously delayed.
[0004] Therefore, the oil exploration geosteering drill collar connecting sealing element is proposed to solve the above problems. CONTENT OF THE UTILITY MODEL
[0005] To achieve the above object, the utility model provides the following technical scheme: an oil exploration geosteering drill collar connecting sealing element, comprising a first shell and a second shell connected by threads, the first shell and the second shell are respectively provided with a threaded column and an internal thread groove on the opposite side, a metal sealing ring is arranged between the opposite sides of the first shell and the second shell and located outside the threaded column, a plurality of butt grooves are arranged on the side of the first shell close to the second shell, a positioning plate matched with the butt grooves is arranged on the metal sealing ring, and a sealing element is arranged between the opposite sides of the first shell and the second shell and located between the threaded column and the positioning plate.
[0006] In the above technical scheme, preferably, the sealing element comprises a guide groove and a sealing groove respectively arranged in the first shell and the second shell, the guide groove is in communication with the butt groove, and one end of the guide groove is in communication with the sealing groove, an elastic body is slidably arranged in the guide groove, and the elastic body is pushed by the positioning plate to move in the guide groove to abut against the inner end of the sealing groove.
[0007] In the technical scheme, preferably, the guide groove comprises a first annular groove and a second annular groove, an inner diameter of the first annular groove is greater than an outer diameter of the second annular groove, the first annular groove is in communication with the butt joint groove, and two ends of the second annular groove are in communication with the first annular groove and the sealing groove respectively.
[0008] In the technical scheme, preferably, the elastic body comprises a sealing ring with elastic deformation capacity, cavities for accommodating gas are arranged in the sealing ring, and elastic hard baffle plates are arranged at two ends of the sealing ring.
[0009] In the technical scheme, preferably, the sealing ring is one of soft silica gel and silicone rubber, and the elastic hard baffle plate is one of hard rubber and polyurethane elastic body.
[0010] In the technical scheme, preferably, inner walls of the guide groove and the sealing groove are finely ground to a smooth surface state and are provided with lubricating medium.
[0011] Compared with the prior art, the utility model has the advantages that:
[0012] The metal sealing ring forms the first solid defense line by virtue of excellent high-temperature resistance, high-pressure resistance and corrosion resistance, effectively blocks the leakage of drilling fluid and other media in a high-pressure environment, and meanwhile, the sealing member as auxiliary sealing further enhances the sealing effect.
[0013] Further in combination with the multiple sealing structure of the elastic sealing member, in the installation stage, the elastic body can be guided into the sealing groove by the pushing action of the positioning plate, that is, the connecting part between the first shell and the second shell is closed, so that the whole sealing structure forms an organic whole, the stability of the structure is enhanced, the elastic body can tightly fill the space in the sealing groove, the possible small leakage channel is blocked, the leakage risk is greatly reduced, and the geological guiding mechanism can maintain a stable sealing state in a harsh downhole environment. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is a structural schematic view of the utility model;
[0015] Figure 2 It is an explosion view of the utility model;
[0016] Figure 3 It is a three-dimensional structural schematic view of the second shell of the utility model;
[0017] Figure 4 It is a sectional view of the first shell of the utility model;
[0018] Figure 5 It is a sectional view of the first shell and the second shell of the utility model after assembly.
[0019] In the figure: 1. First housing; 2. Second housing; 3. Threaded post; 4. Internal threaded groove; 5. Metal sealing ring; 6. Butt groove; 7. Positioning plate; 8. Seal; 81. Guide groove; 811. First annular groove; 812. Second annular groove; 82. Sealing groove; 83. Elastomer; 831. Sealing ring; 832. Cavity; 833. Elastic rigid baffle. Detailed Implementation
[0020] 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.
[0021] like Figures 1 to 5 As shown, this utility model provides a sealing component for a geological directional drill collar for oil exploration, including a first housing 1 and a second housing 2 connected by threads. The first housing 1 and the second housing 2 are respectively provided with a threaded post 3 and an internal threaded groove 4 on opposite sides. A metal sealing ring 5 located outside the threaded post 3 is provided between the opposite sides of the first housing 1 and the second housing 2. Multiple mating grooves 6 are arranged in an array on the side of the first housing 1 near the second housing 2. A positioning plate 7 adapted to the mating groove 6 is provided on the metal sealing ring 5. A sealing component 8 is provided between the opposite sides of the first housing 1 and the second housing 2 and between the threaded post 3 and the positioning plate 7.
[0022] The positioning plate 7 on the metal sealing ring 5 is closely fitted with the docking groove 6 of the first housing 1, making the assembly process convenient and quick. It can ensure that the metal sealing ring 5 is installed quickly and accurately. In the event of subsequent changes in the downhole environment, such as strong vibration or sudden pressure changes, the positioning plate 7 can be locked in the docking groove 6, keeping the metal sealing ring 5 in the optimal sealing position without displacement or shift.
[0023] The combination of the metal sealing ring 5 and the sealing element 8 creates a double sealing barrier. The metal sealing ring 5, with its high temperature, high pressure and corrosion resistance, forms a robust initial sealing barrier on the outside of the threaded post 3, effectively preventing drilling fluid from leaking from the threaded area and meeting the harsh challenges of the downhole environment. The sealing element 8, as an auxiliary seal, further checks for leaks and ensures that the precision components inside the geological steering mechanism are protected from corrosion and maintain a stable working condition.
[0024] The sealing member 8 comprises a guide groove 81 and a sealing groove 82 respectively formed in the first shell 1 and the second shell 2, the guide groove 81 is communicated with the butt joint groove 6, and one end of the guide groove 81 is communicated with the sealing groove 82, and the elastic body 83 is slidably arranged in the guide groove 81, and the elastic body 83 is pushed by the positioning plate 7 to move in the guide groove 81 to abut against the inner end of the sealing groove 82.
[0025] The guide groove 81 comprises a first annular groove 811 and a second annular groove 812, the inner diameter of the first annular groove 811 is greater than the outer diameter of the second annular groove 812, the first annular groove 811 is communicated with the butt joint groove 6, and the two ends of the second annular groove 812 are respectively communicated with the first annular groove 811 and the sealing groove 82.
[0026] The second annular groove 812 connects the first annular groove 811 and the sealing groove 82, accurately guides the movement of the elastic body 83 to the sealing groove 82, eliminates the deviation problem, and ensures efficient completion of the sealing operation;
[0027] The elastic body 83 is in the sealing stage, and is located in the sealing groove 82 and the second annular groove 812 to seal the connection between the first shell 1 and the second shell 2, thereby achieving further elastic sealing.
[0028] The metal sealing ring 5 forms a double sealing, which can fill the small gap to resist the penetration of high-pressure drilling fluid, and can maintain sealing in a vibrating environment, effectively prevent leakage, and protect the operation of internal precision components.
[0029] The elastic body 83 comprises a sealing ring 831 with elastic deformation capability, the sealing ring 831 is provided with a cavity 832 for accommodating gas, and the two ends of the sealing ring 831 are provided with elastic hard baffles 833.
[0030] The cavity 832 in the sealing ring 831 can buffer pressure changes. When the temperature and pressure fluctuate underground, the gas expands and contracts in the cavity, balances the internal and external pressure difference, maintains sealing, and prevents sealing failure.
[0031] The sealing ring 831 is one of soft silicone and silicone rubber, and the elastic hard baffle 833 is one of hard rubber and polyurethane elastomer.
[0032] The sealing ring 831 is made of soft silicone or silicone rubber, which has excellent elasticity, flexibility and aging resistance, can ensure that it is not easily damaged during pressure, stretching and other deformation processes, maintains long-term effective sealing function, and adapts to the slight difference of different outer diameters to achieve good fitting.
[0033] The elastic hard baffle 23 is made of hard rubber, polyurethane elastomer and the like, and its hardness characteristics can provide strong support when the sealing ring expands to prevent excessive deformation, and effectively protect the relatively fragile structure of the sealing ring 831 when external force is applied, so that the entire elastic body 83 has both elasticity and rigidity, and the overall performance is optimized.
[0034] The inner wall of the guide groove 81 and the sealing groove 82 is finely ground to a smooth surface state and is provided with a lubricating medium.
[0035] The inner wall of the guide groove 81 and the sealing groove 82 is finely ground to a smooth surface state and is provided with a lubricating medium.
[0036] And with the lubricating medium, the downhole operation cycle is long, the elastomer 83 moves frequently, the low abrasion can effectively maintain the structural integrity and elastic performance of the elastomer 83, prevent the sealing failure caused by excessive wear, greatly prolong the service life of the elastomer 83 and the whole sealing structure, reduce the maintenance cost and replacement frequency.
[0037] The working principle and use process of the utility model are as follows:
[0038] The metal sealing ring 5 is placed outside the threaded column 3, the positioning plate 7 is aligned with the butt joint groove 6 of the first shell 1, the first shell 1 and the second shell 2 are slowly approached, the threaded column 3 is aligned with the inner threaded groove 4, the first shell 1 is rotated, and the threaded column 3 is screwed with the inner threaded groove 4.
[0039] In this process, with the tightening of the thread, the metal sealing ring 5 is axially extruded and radially expanded to realize sealing, and at the same time, the positioning plate 7 pushes the elastic hard baffle 833 to drive the other end of the sealing ring 831 to pass through the second annular groove 812 into the sealing groove 82, until one end of the elastomer 83 abuts with the inner end of the sealing groove 82, and the whole assembly process is completed.
[0040] It should be noted that in this text, relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.
[0041] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.
Claims
1. An oil-based geosteering drill collar connection seal, characterized by: The utility model provides a threaded connection first shell (1) and second shell (2) are included, the threaded column (3) and the internal thread groove (4) are equipped with respectively with second shell (2) opposite side of first shell (1), the metal sealing ring (5) is equipped with between the opposite side of first shell (1) and second shell (2) and located threaded column (3) outside, the multiple butt joint groove (6) is equipped with with second shell (2) side of first shell (1) close to the array, the positioning plate (7) is equipped with with butt joint groove (6) adaptation on metal sealing ring (5), the sealing element (8) is equipped with between the opposite side of first shell (1) and second shell (2) and located threaded column (3) and positioning plate (7) between.
2. An oil-based mud service collar connection seal as defined in claim 1, wherein: The sealing element (8) includes guide groove (81) and sealing groove (82) that are opened in first shell (1) and second shell (2) respectively, the guide groove (81) is communicated with butt joint groove (6), and one end of the guide groove (81) is communicated with the sealing groove (82), the elastic body (83) is slidably arranged in the guide groove (81), and the elastic body (83) is pushed in the guide groove (81) to one end and the inner end of the sealing groove (82) is abutted with the positioning plate (7).
3. An oil-based mud service drill collar coupling seal as defined in claim 2 wherein: The guide groove (81) includes first annular groove (811) and second annular groove (812), the inner diameter of the first annular groove (811) is greater than the outer diameter of the second annular groove (812), the first annular groove (811) is communicated with butt joint groove (6), and the two ends of the second annular groove (812) are communicated with the first annular groove (811) and the sealing groove (82) respectively.
4. The oil-based drilling geometry guide collar connection seal of claim 2, wherein: The elastic body (83) includes a sealing ring (831) with elastic deformation capacity, the sealing ring (831) is provided with a cavity (832) for accommodating gas, and the two ends of the sealing ring (831) are provided with elastic hard baffle plates (833).
5. An oil-based mud service drill collar coupling seal as defined in claim 4, wherein: The sealing ring (831) is one of soft silica gel and silicone rubber, and the elastic hard baffle plates (833) are one of hard rubber and polyurethane elastomer.
6. An oil-based mud service drill collar coupling seal as defined in claim 2 wherein: The inner walls of the guide groove (81) and the sealing groove (82) are finely ground to a smooth surface state and are provided with lubricating medium.