A cylindrical thread surface sealing device for oil drilling tools

Abstract

The present invention discloses a cylindrical threaded surface sealing device for oil drilling tools, comprising a connecting base, a threaded rod, and a threaded groove provided inside the connecting base, the outer surface of the threaded rod is provided with a threaded structure matched with the threaded groove, the upper surface of the connecting base and located outside the threaded groove is provided with a limiting groove, the outer surface of the threaded rod is fixedly connected with a fixing piece, the outer surface of the threaded rod and located below the fixing piece are sleeved with a pressing plate, the lower surface of the pressing plate is provided with a sealing piece, the interior of the sealing piece is provided with an inner sealing piece, and the outer surface of the inner sealing piece has a sealing protrusion. According to the present invention, when the threaded rod is connected, as the screw rod is screwed in, the pressing plate and the upper surface of the connecting base realize squeezing the sealing piece, thereby realizing a sealing effect, and adjusting the position height of the pressing plate and the sealing piece can adapt to different screwing depths of the threaded rod, thereby increasing the applicability of the device.

Description

Technical Field

[0001] The invention relates to the field of oil drilling tool connection, in particular to a cylindrical thread surface sealing device for oil drilling tools. Background Art

[0002] Petroleum refers to a mixture of gaseous, liquid and solid hydrocarbons with natural occurrences. At present, petroleum plays a very important role in every country. The development of the petroleum industry can promote the country's economic situation. Therefore, the development of petroleum is essential.

[0003] The process of oil development involves the use of drilling tools, and the installation between drilling tools and various parts is often done by threaded connection. In the past, gaskets were used to achieve the sealing effect. However, when the connecting piece is a screw structure and lacks a nut to tighten the gasket, this sealing structure cannot achieve the sealing effect, so its applicability is relatively low. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a cylindrical thread surface sealing device for oil drilling tools.

[0005] In order to achieve the above-mentioned object, the present invention adopts the following technical scheme: a cylindrical threaded surface sealing device for petroleum drilling tools, comprising a connecting base, a threaded rod, and a threaded groove provided inside the connecting base, wherein the outer surface of the threaded rod is provided with a threaded structure matching with the threaded groove, and a limiting groove is provided on the upper surface of the connecting base and located outside the threaded groove;

[0006] The outer surface of the threaded rod is fixedly connected with a fixing piece, the outer surface of the threaded rod and below the fixing piece is sleeved with a pressing plate, and the lower surface of the pressing plate is provided with a sealing piece;

[0007] An inner sealing member is arranged inside the sealing member, and a sealing protrusion is arranged on the outer surface of the inner sealing member.

[0008] As a further description of the above technical solution:

[0009] The cross-sectional structure of the sealing member is in an "E" shape, and the sealing member is made of an elastic material.

[0010] As a further description of the above technical solution:

[0011] An adjusting groove is formed on the inner surface of the fixing member, and the diameter of the adjusting groove is larger than the threaded rod.

[0012] As a further description of the above technical solution:

[0013] An adjustment plate is fixedly connected to the upper surface of the pressing plate. The interior of the adjustment plate is a hollow structure. The top of the adjustment plate extends to the interior of the adjustment slot and is slidably connected to the adjustment slot via a slide rail.

[0014] As a further description of the above technical solution:

[0015] The outer surface of the adjustment plate is provided with a plurality of adjustment holes, and the adjustment holes are evenly distributed around the surface of the adjustment plate.

[0016] As a further description of the above technical solution:

[0017] The fixing piece is fixedly connected to the adjustment plate via fastening bolts, and there are at least two fastening bolts.

[0018] As a further description of the above technical solution:

[0019] There are multiple sealing protrusions, and the sealing protrusions are all distributed on the outer surface of the inner sealing member.

[0020] As a further description of the above technical solution:

[0021] The limiting groove corresponds to the outer contour of the sealing element.

[0022] The present invention has the following beneficial effects:

[0023] 1. Compared with the prior art, the cylindrical threaded surface sealing device for oil drilling tools, through the set fixing part and the pressing plate, when the two are fixedly connected, when the threaded rod is connected, as the spiral rod is screwed in, the pressing plate and the upper surface of the connecting base realize the compression of the sealing part, thereby realizing the sealing effect.

[0024] 2. Compared with the prior art, the cylindrical threaded surface sealing device for oil drilling tools, through the design of the adjusting plate and the adjusting groove, enables the adjusting plate to be pulled and pulled inside the adjusting groove, thereby adjusting the position height of the pressing plate and the sealing member, and can adapt to different depths of the threaded rod being screwed in, thereby increasing the applicability of the device.

[0025] 3. Compared with the prior art, the cylindrical threaded surface sealing device for oil drilling tools has an inner sealing member arranged inside the sealing member, which can seal the gap between the threaded rod and the threaded groove. At the same time, the sealing protrusion, the folded edge of the outer contour of the sealing member and the limiting groove cooperate to better increase the sealing effect.

[0026] 4. Compared with the prior art, the cylindrical threaded surface sealing device for oil drilling tools adopts an integrated structural design of the threaded rod and the pressing plate, which makes it more convenient to carry and can prevent the disadvantage of small parts being easily lost to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the internal structure of a cylindrical thread surface sealing device for oil drilling tools proposed by the present invention;

[0028] Figure 2 This is a front view of the overall structure of a cylindrical threaded surface sealing device for oil drilling tools proposed by the present invention;

[0029] Figure 3 This is a front view of a pressing plate structure of a cylindrical threaded surface sealing device for oil drilling tools proposed by the present invention;

[0030] Figure 4 A schematic diagram of the seal structure of a cylindrical thread surface seal device for oil drilling tools proposed by the present invention;

[0031] Figure 5 The present invention proposes Figure 1 A partial enlarged view of point A in the middle.

[0032] Legend:

[0033] 1. Connecting base; 2. Threaded rod; 3. Threaded groove; 4. Limiting groove; 5. Fixing piece; 6. Adjusting groove; 7. Pressing plate; 8. Adjusting plate; 9. Adjusting hole; 10. Fastening bolt; 11. Sealing piece; 12. Inner sealing piece; 13. Sealing protrusion. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Example:

[0037] Reference Figure 1-5 The present invention provides a cylindrical threaded surface sealing device for oil drilling tools: it includes a connecting base 1, a threaded rod 2, and a threaded groove 3 opened inside the connecting base 1, the threaded groove 3 and the threaded rod 2 cooperate with each other, the outer surface of the threaded rod 2 is provided with a threaded structure that cooperates with the threaded groove 3, the threaded rod 2 can be a threaded structure at one end or both ends, and accordingly, the setting of the pressing plate 7 and the fixing part 5 can enable one end or both ends to be connected to the upper surface of the base 1 and to be provided with a limiting groove 4 located on the outside of the threaded groove 3, the limiting groove 4 and the outer contour folding edge of the sealing member 11 cooperate with each other to realize the sealing structure.

[0038] The outer surface of the threaded rod 2 is fixedly connected to a fixing piece 5, and a pressing plate 7 is sleeved on the outer surface of the threaded rod 2 and located below the fixing piece 5. The pressing plate 7 squeezes the sealing piece 11 to achieve a sealing effect. The lower surface of the pressing plate 7 is provided with a sealing piece 11, and the sealing piece 11 seals the threaded surface of the cylinder. A plurality of adjusting holes 9 are provided on the outer surface of the adjusting plate 8, and the adjusting holes 9 cooperate with the fastening bolts 10, and the adjusting holes 9 are evenly distributed around the surface of the adjusting plate 8. The fixing piece 5 is fixedly connected to the adjusting plate 8 by the fastening bolts 10. There are at least two fastening bolts 10 for fastening the fixing piece 5 and the adjusting plate 8.

[0039] An inner seal 12 is arranged inside the seal 11, and the inner seal 12 seals the gap between the threaded rod 2 and the thread groove 3. The outer surface of the inner seal 12 has a sealing protrusion 13. There are multiple sealing protrusions 13, and the sealing protrusions 13 are distributed on the outer surface of the inner seal 12. The sealing protrusions 13 can increase the sealing performance.

[0040] The cross-sectional structure of the sealing member 11 is in an "E" shape. The sealing member 11 is made of an elastic material, and may be made of silicone rubber, so as to realize a good sealing structure from the inside to the outside.

[0041] An adjusting groove 6 is provided on the inner surface of the fixing part 5. The diameter of the adjusting groove 6 is larger than that of the threaded rod 2 and cooperates with the adjusting plate 8. The upper surface of the pressing plate 7 is fixedly connected with the adjusting plate 8. The interior of the adjusting plate 8 is a hollow structure to achieve a protective effect on the outer surface of the threaded rod 2. The top of the adjusting plate 8 extends to the interior of the adjusting groove 6 and is slidably connected to the adjusting groove 6 through a slide rail, which facilitates the position adjustment of the pressing plate 7 and has a limiting effect on the pressing plate 7.

[0042] The limiting groove 4 corresponds to the outer contour of the sealing member 11 , and the outer contour of the sealing member 11 is matched with the limiting groove 4 to seal the thread surface again from the outside.

[0043] Working principle: When in use, first determine the depth of the threaded rod 2 that needs to be connected, then loosen the fastening bolt 10, so that the adjusting plate 8 slides inside the adjusting groove 6, thereby realizing the position adjustment of the pressing plate 7. When the position adjustment of the pressing plate 7 is completed, the position of the pressing plate 7 is fixed by the cooperation of the fastening bolt 10 and the adjusting hole 9, and then the threaded rod 2 is tightened, and the threaded rod 2 is continuously screwed in through the cooperation with the thread groove 3, and then the inner seal 11 arranged inside the seal 11 is inserted into the thread groove 3 close to the surface of the threaded rod 2, and the outer contour folded edge of the seal 11 is inserted into the inside of the limit groove 4. As the threaded rod 2 is continuously screwed in, the pressing plate 7 gradually realizes the sealing effect on the seal 11, thereby realizing the sealing of the threaded surface at the connection.

[0044] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cylindrical threaded surface sealing device for oil drilling tools, comprising a connecting base (1), a threaded rod (2), and a threaded groove (3) provided inside the connecting base (1), characterized in that: The outer surface of the threaded rod (2) is provided with a thread structure matching the thread groove (3); the upper surface of the connecting base (1) is provided with a limit groove (4) located outside the thread groove (3); the outer surface of the threaded rod (2) is fixedly connected with a fixing member (5); the outer surface of the threaded rod (2) is sleeved with a pressing plate (7) located below the fixing member (5); the lower surface of the pressing plate (7) is provided with a sealing member (11); the interior of the sealing member (11) is provided with an inner sealing member (12); the outer surface of the inner sealing member (12) has a sealing protrusion (13); An adjustment plate (8) is fixedly connected to the upper surface of the pressing plate (7), the interior of the adjustment plate (8) is a hollow structure, the top of the adjustment plate (8) extends to the interior of the adjustment groove (6), and is slidably connected to the adjustment groove (6) via a slide rail; The outer surface of the adjustment plate (8) is provided with a plurality of adjustment holes (9), and the adjustment holes (9) are evenly distributed around the surface of the adjustment plate (8); The fixing member (5) is fixedly connected to the adjustment plate (8) via fastening bolts (10), and there are at least two fastening bolts (10).

2. A cylindrical thread surface sealing device for oil drilling tools according to claim 1, characterized in that: The cross-sectional structure of the sealing member (11) is in the shape of an "E" and the sealing member (11) is made of an elastic material.

3. The cylindrical thread surface sealing device for oil drilling tools according to claim 1, characterized in that: An adjustment groove (6) is provided on the inner surface of the fixing member (5), and the diameter of the adjustment groove (6) is larger than that of the threaded rod (2).

4. The cylindrical thread surface sealing device for oil drilling tools according to claim 1, characterized in that: The number of the sealing protrusions (13) is plural, and the sealing protrusions (13) are all distributed on the outer surface of the inner sealing member (12).

5. The cylindrical thread surface sealing device for oil drilling tools according to claim 1, characterized in that: The limiting groove (4) corresponds to the outer contour of the sealing member (11).

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