A super-high temperature pressure-bearing kettle body

Abstract

The present invention proposes an ultra-high temperature pressure kettle, comprising a kettle body and a sealing cover sealed at the top end of the kettle body, the inner wall at the top end of the kettle body is provided with a boss extending toward the outside of the kettle body, the boss divides the kettle body into an upper mounting section and a lower kettle body, the kettle body is used to contain experimental drilling fluid, a threaded section is provided on the inner wall of the top circumference of the mounting section, the threaded section is connected to a flange through threads; the sealing cover is located at the open end of the kettle body and is tightly pressed on the boss by the flange; the top end of the kettle body designed by the present invention is provided with a boss away from the inside of the kettle body, the upper part of the boss is the mounting section, the sealing cover and the flange that plays a tightening role are all in the form of filling, and the various components are tightly pressed to the mouth of the kettle body. Compared with the traditional buckling form, this design has expansion in calcination and expansion of various components, and this filling form of sealing has a better sealing effect.

Description

Technical Field

[0001] The present invention relates to the technical field of aging kettles, and particularly to an ultra-high temperature pressure-bearing kettle body. Background Art

[0002] As the tertiary oil recovery mainly developed in the direction of chemical flooding has become the dominant technology for the continuous stable production of old oilfields, the oilfield chemicals used in tertiary oil recovery have obvious effects and large dosages. However, what impacts do these oilfield chemicals have on the properties of crude oil, how significant are the impacts, and whether they will have an adverse effect on the subsequent processing of crude oil. Therefore, it is extremely important to deeply study the distribution law of oilfield chemicals in oil and water, detect the possible reactions, products between oilfield chemicals and crude oil, and the impacts on the properties of crude oil.

[0003] In the detection work of oilfield chemicals, high-temperature and high-pressure aging experiments of oilfield chemicals are often involved, which requires corresponding containers to conduct temperature resistance experiments on oilfield chemicals. The traditional aging kettle places the sealing cover on the kettle body and then uses nuts with screw threads on the outer wall of the kettle body. This sealing method is difficult to reach a service temperature above 300°C. Summary of the Invention

[0004] To solve the above problems, the present invention proposes an ultra-high temperature pressure-bearing kettle body. This pressure-bearing kettle body can be hermetically sealed under high-temperature and high-pressure conditions for a long time, and the highest service temperature reaches 370°C.

[0005] The technical solution of the present invention is realized as follows: An ultra-high temperature pressure-bearing kettle body includes a kettle body and a sealing cover plugged at the top end of the kettle body.

[0006] The inner wall of the top end of the kettle body is provided with a convex platform extending towards the outside of the kettle body. The convex platform divides the kettle body into an upper installation section and a lower kettle body. The kettle body is used to contain experimental drilling fluid. A threaded section is provided on the inner wall of the top circumference of the installation section, and a flange is connected by threads to the threaded section.

[0007] The sealing cover is located at the open end of the kettle body and is tightly pressed on the convex platform through the flange.

[0008] A central hole is provided on the axis of the flange, and a plurality of threaded through holes located on the same circumference are also provided on the flange.

[0009] A gasket is provided between the sealing cover and the flange.

[0010] A set screw is connected in cooperation with the threaded through hole, and the bottom of the screw of the set screw abuts against the upper surface of the gasket.

[0011] A through-hole is provided at the center of the sealing cover. An exhaust valve is connected to the top end of the through-hole by means of a thread. A diversion pipe is press-fitted to the bottom end of the through-hole. The diversion pipe is located inside the kettle body.

[0012] A protective cover is provided outside the exhaust valve. The protective cover is fixed on the sealing cover. Exhaust holes are provided on the side wall of the protective cover.

[0013] Preferably, a sealing ring is further provided between the sealing cover and the boss.

[0014] Preferably, the sealing cover is composed of a cover body, a cylindrical engaging ring, and a stepped step located at the top end of the cover body. The engaging ring is located at the bottom end of the cover body, and the inner diameter of the engaging ring is smaller than the inner diameter of the cover body.

[0015] The cover body is located inside the installation section, and its bottom end surface is in close contact with the upper surface of the boss.

[0016] The circumferential outer wall of the engaging ring is in close contact with the circumferential inner wall of the kettle body.

[0017] Preferably, the cover body, the engaging ring, and the stepped step are integrally designed.

[0018] Preferably, the protective cover is threadedly connected to the top side wall of the stepped step.

[0019] Preferably, the through-hole is composed of a first hole located on the stepped step and a second hole located on the cover body. The top end of the second hole is constricted, and its bottom end is press-fitted to the diversion pipe.

[0020] Preferably, the number of the threaded through-holes is 6 to 10.

[0021] Preferably, the kettle body, the sealing cover, the flange, the diversion pipe, and the gasket are all made of nickel-based alloy.

[0022] Advantages of the present invention:

[0023] 1. The kettle body designed in the present invention is provided with a boss deviating from the inside of the kettle body at the top end. The upper part of the boss is an installation section. The sealing cover and the flange playing a fastening role are all in a stuffing form, and each component is tightly pressed to the mouth of the kettle body. Compared with the traditional buckling form, during calcination and expansion, each component will expand, and the stuffing form of sealing has a better sealing effect.

[0024] 2. The cover body of the sealing cover and the boss in the kettle body are linearly sealed. The engaging ring located at the bottom end of the cover body is in close contact with the inner wall of the kettle body. During the calcination process, the engaging ring expands and further fits with the inner wall of the kettle body, enhancing the sealing effect between the sealing cover and the kettle body.

[0025] 3. A gasket is designed between the cover body and the flange plate, and the bottom of the screw can abut against the gasket, enhancing the sealing performance between the sealing cover and the kettle body.

[0026] 4. During the calcination of the pressure-bearing kettle body in the heating furnace, gases may be generated. The gases expand at high temperatures, resulting in high pressure. The sealing cover will be subjected to a large repulsive force. At this time, the abutting action of the bottom of the screw presses the sealing cover tightly so that it will not separate from the kettle body. Moreover, a slot is designed on the sealing cover, and a buffer zone is formed between the diversion pipe installed at the bottom of the slot and the snap ring. A protective cover is added outside the exhaust valve to prevent the blasting phenomenon caused by the reverse flow of the drilling fluid in the kettle.

[0027] 5. All components of the pressure-bearing kettle body are made of high-temperature and corrosion-resistant materials, such as nickel-based alloys, which can withstand higher operating temperatures. The structure and metal material of this design enable the maximum operating temperature of the pressure-bearing kettle body to reach 370 °C. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 It is a schematic structural diagram of the present invention.

[0030] In the figure: 1 - kettle body; 2 - sealing ring; 3 - diversion pipe; 4 - sealing cover; 5 - gasket; 6 - flange plate; 7 - protective cover; 8 - exhaust valve; 9 - O-ring; 10 - set screw. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0032] As Figure 1 shown, a super-high-temperature pressure-bearing kettle body includes a kettle body 1 and a sealing cover 4 sealed at the top of the kettle body 1.

[0033] The inner wall at the top of the kettle body 1 is provided with a boss extending to the outside of the kettle body 1. The boss divides the kettle body 1 into an upper installation section and a lower kettle body. The kettle body is used to hold the experimental drilling fluid. A threaded section is provided on the inner wall of the top circumference of the installation section, and a flange 6 is connected by threads to the threaded section;

[0034] The sealing cover 4 is located at the open end of the kettle body and is tightly pressed on the boss through the flange 6;

[0035] A central hole is provided on the axis of the flange 6, and a plurality of threaded through holes located on the same circumference are also provided on the flange 6;

[0036] A gasket 5 is provided between the sealing cover 4 and the flange 6;

[0037] A set screw 10 is connected in cooperation with the threaded through hole, and the bottom of the screw rod of the set screw 10 abuts against the upper surface of the gasket 5;

[0038] A through slot hole is provided at the center of the sealing cover 4. An exhaust valve 8 is connected by threads to the top end of the through slot hole, and a diversion pipe 3 is in interference fit with the bottom end of the through slot hole. The diversion pipe 3 is located inside the kettle body;

[0039] A protective cover 7 is provided outside the exhaust valve 8. The protective cover 7 is fixed on the sealing cover 4, and exhaust holes are provided on the side wall of the protective cover 7.

[0040] A sealing ring 2 is also provided between the sealing cover 4 and the boss;

[0041] The sealing cover 4 is composed of a cover body, a cylindrical engaging ring, and a stepped step located at the top end of the cover body. The engaging ring is located at the bottom end of the cover body, and the inner diameter of the engaging ring is smaller than the inner diameter of the cover body;

[0042] The cover body is located inside the installation section, and its bottom end surface is in close contact with the upper surface of the boss;

[0043] The circumferential outer wall of the engaging ring is in close contact with the circumferential inner wall of the kettle body.

[0044] The cover body, the engaging ring, and the stepped step are integrally designed.

[0045] The protective cover 7 is connected by threads to the side wall at the top end of the stepped step.

[0046] The through slot hole is composed of a first slot hole located on the stepped step and a second slot hole located on the cover body. The top end of the second slot hole contracts, and its bottom end is in interference fit with the diversion pipe 3.

[0047] The number of threaded through holes is 6 - 10. In this design, 8 threaded through holes are adopted.

[0048] The kettle body 1, the sealing cover 4, the flange 6, the diversion pipe 3, and the gasket 5 are all made of nickel-based alloy. They have high temperature resistance and high strength. The operating temperature of the pressure-bearing kettle body in this design can reach 370 °C.

[0049] Working principle: Add the test sample into the kettle body, and the addition amount shall not exceed two-thirds of the volume of the kettle body. First install the sealing ring 2 and then the sealing cover 4, followed by the gasket 5 and the flange 6. Use a torque wrench to apply different torque values in batches to tighten the flange 6. Place the pressure-bearing kettle body between the two rollers in the heating furnace. After the test is completed, take out the pressure-bearing kettle body from the furnace and cool it to room temperature. Place the aging kettle upright, slowly loosen the exhaust valve 8 to release the remaining gas in the kettle body. Loosen the eight set screws 10 on the flange 6, unscrew the flange 6, take out the gasket 5, the sealing cover 4, the sealing ring 2 in sequence, and pour out the test sample. Clean all the components in the pressure-bearing kettle body, dry them, and apply lubricating oil to the threaded parts for storage.

[0050] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A super-high temperature pressure-bearing kettle body, including a kettle body and a sealing cover plugged at the top end of the kettle body, characterized in that: on the inner wall of the top end of the kettle body, there is a convex platform extending towards the outside of the kettle body. The convex platform divides the kettle body into an upper installation section and a lower kettle body. The kettle body is used to hold experimental drilling fluid. On the inner wall of the circumferential top of the installation section, there is a threaded section, and a flange is connected by threads to the threaded section; the sealing cover is located at the open end of the kettle body and is tightly pressed on the convex platform through the flange; on the axis of the flange, there is a central hole, and the flange is also provided with a plurality of threaded through holes located on the same circumference; a gasket is provided between the sealing cover and the flange; a set screw is fitted and connected in the threaded through hole, and the bottom of the screw of the set screw abuts against the upper surface of the gasket; at the center of the sealing cover, there is a through slot hole. An exhaust valve is connected by threads to the top end of the through slot hole, and a diversion pipe is in interference fit with the bottom end of the through slot hole. The diversion pipe is located inside the kettle body; a protective cover is provided outside the exhaust valve. The protective cover is fixed on the sealing cover, and exhaust holes are provided on the side wall of the protective cover; the sealing cover is composed of a cover body, a cylindrical clamping ring, and a stepped step located at the top end of the cover body. The clamping ring is located at the bottom end of the cover body, and the inner diameter of the clamping ring is smaller than the inner diameter of the cover body; the cover body is located inside the installation section, and its bottom end surface is tightly attached to the upper surface of the convex platform; the circumferential outer wall of the clamping ring is tightly attached to the circumferential inner wall of the kettle body; the cover body, the clamping ring, and the stepped step are integrally designed.

2. A super-high temperature pressure-bearing kettle body according to claim 1, characterized in that: a sealing ring is further provided between the sealing cover and the convex platform.

3. A super-high temperature pressure-bearing kettle body according to claim 2, characterized in that: the protective cover is connected by threads to the side wall of the top end of the stepped step.

4. A super-high temperature pressure-bearing kettle body according to claim 2, characterized in that: the through slot hole is composed of a first slot hole located on the stepped step and a second slot hole located on the cover body. The top end of the second slot hole shrinks, and its bottom end is in interference fit with the diversion pipe.

5. A super-high temperature pressure-bearing kettle body according to claim 1, characterized in that: the number of the threaded through holes is 6 to 10.

6. A super-high temperature pressure-bearing kettle body according to claim 1, characterized in that: the kettle body, the sealing cover, the flange, the diversion pipe, and the gasket are all made of nickel-based alloy.

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