Sealing kettle cover of high-temperature and high-pressure corrosion instrument kettle body

Abstract

The utility model discloses a kettle body sealing kettle cover of a high-temperature and high-pressure corrosion instrument, which comprises an inner kettle cover and an outer kettle cover, the inner kettle cover is arranged in an opening at the upper end of a kettle body, the bottom surface of the inner kettle cover is provided with an annular bulge corresponding to an annular groove of the kettle body below, and a sealing gasket is arranged in the annular groove; the outer kettle cover is arranged above the inner kettle cover, the outer kettle cover is in threaded connection with the opening of the kettle body, and a jackscrew is axially arranged on the outer kettle cover and is used for pressing the inner kettle cover downwards. The problem of pressure leakage in the high-temperature and high-pressure corrosion test process can be solved; equipment can operate for a long time in a high-temperature and high-pressure state; the device is simple in structure and principle and convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of corrosion instrument equipment, in particular to a sealed kettle cover for a high-temperature and high-pressure corrosion instrument kettle. Background Art

[0002] Currently, during the design and construction process for offshore oil and gas field development, the selection of tubing and casing materials is primarily based on the corrosion charts in the "Guidelines for Corrosion Protection Design of Offshore Oil and Gas Wells." Taking tubing selection under CO2 corrosion conditions as an example, the chart's maximum CO2 partial pressure is only 10 MPa. When the actual reservoir temperature exceeds 150°C, the chart's maximum CO2 partial pressure is only 1 MPa. Compared to actual operating conditions, the chart's coverage is limited. Furthermore, the corrosion environments of many newly developed wells exceed the conditions in the corrosion charts, making it difficult for existing test equipment to simulate and evaluate tubing and casing corrosion under these complex operating conditions. To address this issue, the construction of a high-temperature, high-pressure corrosion test platform capable of simulating actual field conditions is imperative. However, the key technology for such a test platform is the sealing of the cauldron of the high-temperature, high-pressure corrosion instrument. Therefore, a sealing method that meets the design requirements of the test platform is urgently needed. Utility Model Content

[0003] The utility model provides a sealed kettle cover for a high-temperature and high-pressure corrosion instrument, which can meet the sealing requirements of the test platform design.

[0004] To achieve the above objectives, this application provides the following technical solutions:

[0005] A high-temperature and high-pressure corrosion instrument kettle body sealed kettle cover, comprising:

[0006] An inner kettle cover is arranged in the opening at the upper end of the kettle body, and an annular protrusion is provided on the bottom surface of the inner kettle cover corresponding to the annular groove of the lower kettle body, and a sealing gasket is provided in the annular groove;

[0007] The outer kettle cover is arranged above the inner kettle cover, the outer kettle cover is threadedly connected to the opening of the kettle body, and the outer kettle cover is axially provided with a top screw, and the top screw is used to press down the inner kettle cover.

[0008] Optionally, a circumferential mounting groove is provided on the outer peripheral wall of the inner kettle cover, and a sealing ring is provided in the mounting groove.

[0009] Optionally, the outer kettle cover is provided with a plurality of top screw mounting holes distributed along the circumferential direction, and the hole axes of the top screw mounting holes are arranged parallel to the axis of the outer kettle cover.

[0010] Optionally, the top screw is arranged in the top screw installation hole, the lower end of the top screw is against the upper surface of the inner kettle cover, the upper end of the top screw extends out of the upper surface of the outer kettle cover, and the upper end of the top screw is used to connect the operating handle.

[0011] Optionally, the position where the lower end of the setscrew abuts against the upper surface of the inner kettle cover corresponds to the annular protrusion.

[0012] Optionally, a connecting shaft extending upward is provided in the middle of the upper surface of the inner kettle cover, a connecting hole corresponding to the connecting shaft is provided in the middle of the outer kettle cover, and the connecting shaft extends upward out of the connecting hole.

[0013] In summary, the technical effects and advantages of the present utility model are as follows: This application can solve the problem of pressure leakage during the high-temperature and high-pressure corrosion test; it can enable the equipment to operate for a long time under high-temperature and high-pressure conditions; the structure and principle of this application are simple and the operation is convenient. Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 It is a schematic structural diagram of the kettle body sealing kettle cover of the high-temperature and high-pressure corrosion instrument in an embodiment of the present utility model;

[0016] Figure 2 It is a top view of the outer kettle cover in an embodiment of the present utility model.

[0017] Wherein: 1. Outer kettle cover; 2. Inner kettle cover; 3. O-ring seal; 4. Gasket; 5. Operating handle; 6. Connecting shaft; 7. Setscrew mounting hole; 8. Kettle body; 9. Annular protrusion; 10. Setscrew; 11. Connecting hole. Detailed Embodiment

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some, rather than all, embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model.

[0019] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0020] This embodiment provides a kettle body sealing kettle cover for a high-temperature and high-pressure corrosion instrument, as shown in Figure 1 and Figure 2As shown in the figure, it includes an inner kettle cover 2 and an outer kettle cover 1. The outer kettle cover 1 is the main part of the sealing kettle cover of the high-temperature and high-pressure corrosion tester kettle body. Both the inner kettle cover 2 and the outer kettle cover 1 are arranged in the opening at the upper end of the kettle body 8. The bottom surface of the inner kettle cover 2 is provided with an annular protrusion 9 corresponding to the annular groove of the lower kettle body 8, and a sealing gasket 4 is arranged in the annular groove. The outer kettle cover 1 is arranged above the inner kettle cover 2. The outer side surface of the outer kettle cover 1 is provided with an external thread, and the opening of the kettle body 8 is provided with an internal thread. The outer kettle cover 1 is threadedly connected to the opening of the kettle body 8. A setscrew 10 is arranged axially on the outer kettle cover 1. The setscrew 10 is used to press down the inner kettle cover 2 so that the annular protrusion 9 squeezes the sealing gasket 4 in the annular groove to ensure the sealing performance. In this embodiment, the sealing gasket 4 is made of polytetrafluoroethylene material, and the specific material of the present application is not limited.

[0021] In this embodiment, the bottom of the inner kettle cover 2 is provided with an annular protrusion 9. During use, the annular protrusion 9 squeezes the lower sealing gasket 4 for sealing. The outer kettle cover 1 is threadedly connected to the opening at the upper end of the kettle body 8 for threaded connection and sealing. A sealing ring can also be arranged corresponding to the outer periphery below the outer kettle cover 1 in the opening of the kettle body 8 to further improve the sealing performance.

[0022] Specifically, a circumferential installation groove is arranged on the outer peripheral wall of the inner kettle cover 2, and a sealing ring is arranged in the installation groove. In this embodiment, the sealing ring is an O-ring 3. This sealing, together with the aforementioned threaded sealing and the sealing at the annular protrusion 9, forms a triple seal.

[0023] Optionally, a plurality of setscrew installation holes 7 distributed circumferentially are arranged on the outer kettle cover 1. The setscrew installation holes 7 penetrate from the upper surface of the outer kettle cover 1 to the lower surface of the outer kettle cover. The axis of the setscrew installation holes 7 is arranged parallel to the axis of the outer kettle cover 1. The setscrew installation holes 7 are used for installing setscrews. The setscrew installation holes can be evenly distributed, and the setscrews are evenly distributed. The acting positions of the setscrews on the inner kettle cover 2 are also evenly distributed, so that the inner kettle cover 2 is stressed evenly and can apply uniform pressure to the sealing gasket 4.

[0024] Optionally, the setscrew is arranged in the setscrew installation hole 7. The lower end of the setscrew abuts against the upper surface of the inner kettle cover 2, and the upper end of the setscrew extends out of the upper surface of the outer kettle cover 1. The upper end of the setscrew is used to connect an operating handle 5. Rotating the operating handle 5 can drive the setscrew to rotate, thereby pressing down the inner kettle cover 2 for easy operation.

[0025] Optionally, the position where the lower end of the setscrew abuts against the upper surface of the inner kettle cover 2 corresponds to the annular protrusion 9, so that the setscrew directly acts above the annular protrusion 9.

[0026] Optionally, a connecting shaft 6 extending upward is provided in the middle of the upper surface of the inner kettle cover 2, and a connecting hole 11 corresponding to the connecting shaft 6 is provided in the middle of the outer kettle cover 1, and the connecting shaft 6 extends upward out of the connecting hole 11. A sealing ring can also be provided between the connecting shaft 6 and the connecting hole to ensure the sealing performance of the connection between the two.

[0027] This embodiment adopts an integrated combination of multiple seals. The seals include the first threaded seal, the second O-ring seal, and the third seal is to add an inner kettle cover inside the kettle cover. An annular protrusion is provided at the bottom of the inner kettle cover, and a polytetrafluoroethylene sealing gasket below is squeezed during use for sealing. Slight leakage during the high-temperature and high-pressure corrosion test can cause a significant drop in pressure and damage the test. The combination of the triple-seal method of the kettle cover of this structure basically has the characteristics of "complete seal" without affecting the test operation difficulty, and can ensure long-term operation under high-temperature and high-pressure conditions (such as 70 MPa, 200 °C).

[0028] In summary, this embodiment can solve the problem of pressure leakage during the high-temperature and high-pressure corrosion test; it can enable the equipment to operate for a long time under high-temperature and high-pressure conditions; the structure and principle of this application are simple and the operation is convenient.

[0029] For ease of explanation, spatially relative terms such as "upper", "lower", "outer layer", "inner layer", etc. are used in the embodiments to describe the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations during the use or operation of the device. Therefore, the exemplary term "lower" can include both the upper and lower orientations.

[0030] Moreover, relational terms such as "3" and "4" are only used to distinguish one component with the same name from another, and do not necessarily require or imply any such actual relationship or order between these components.

[0031] Although the preferred embodiments of the present invention are described above in conjunction with the accompanying drawings, the present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can also make many specific transformations in form without departing from the purpose of the invention and the scope protected by the claims. All of these fall within the protection scope of the present invention.

Claims

1. A sealing kettle cover for a high-temperature and high-pressure corrosion tester kettle body, characterized in that, Comprising: An inner kettle lid, which is arranged in the opening at the upper end of the kettle body. A circular protrusion is provided on the bottom surface of the inner kettle lid corresponding to the circular groove of the lower kettle body, and a sealing gasket is arranged in the circular groove; An outer kettle lid, which is arranged above the inner kettle lid. The outer kettle lid is threadedly connected to the opening of the kettle body. A jackscrew is provided axially on the outer kettle lid, and the jackscrew is used to press down the inner kettle lid.

2. The kettle body sealing kettle cover of a high-temperature and high-pressure corrosion instrument according to claim 1, characterized in that: A circumferential installation groove is provided on the outer peripheral wall of the inner kettle lid, and a sealing ring is arranged in the installation groove.

3. A high-temperature and high-pressure corrosion instrument kettle body sealing kettle cover according to claim 1, characterized in that: A plurality of circumferentially distributed jackscrew installation holes are provided on the outer kettle lid, and the axis of the jackscrew installation holes is parallel to the axis of the outer kettle lid.

4. The kettle body sealing kettle cover of a high-temperature and high-pressure corrosion instrument according to claim 3, characterized in that: The jackscrew is arranged in the jackscrew installation hole. The lower end of the jackscrew abuts against the upper surface of the inner kettle lid, and the upper end of the jackscrew extends out of the upper surface of the outer kettle lid. The upper end of the jackscrew is used to connect an operating handle.

5. A high-temperature and high-pressure corrosion tester kettle body sealing kettle cover according to claim 4, characterized in that: The position where the lower end of the jackscrew abuts against the upper surface of the inner kettle lid corresponds to the circular protrusion.

6. A high-temperature and high-pressure corrosion tester kettle body sealing kettle cover according to claim 1, characterized in that: A connecting shaft extending upward is provided in the middle of the upper surface of the inner kettle lid. A connecting hole corresponding to the connecting shaft is provided in the middle of the outer kettle lid, and the connecting shaft extends upward out of the connecting hole.

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