Piston type visual high-pressure-resistant intermediate container

Abstract

The utility model discloses a piston type visual high-pressure-resistant intermediate container, and belongs to the technical field of intermediate containers. The device comprises a piston, a sealing cover, an upper cover and a lower cover, the sealing cover, the upper cover and the lower cover are detachably connected and jointly form a main body structure with a hollow inner cavity; a piston is arranged in the hollow inner cavity, can slide up and down in a sealing manner along the inner wall of the sealing cover and divides the hollow inner cavity into an upper cavity and a lower cavity which are not communicated with each other; the top and the bottom of the piston respectively extend out of the upper cover and the lower cover and are in sealed sliding connection with the upper cover and the lower cover; the upper cover is fixedly provided with a temperature sensor and a pressure sensor which are used for measuring indexes of the hollow inner cavity, and is also provided with an injection channel and an output channel; the lower cover is provided with a driving pressure input channel. The piston structure can prevent the piston from rollover, blockage and the like when the piston moves up and down, and the position of the piston can be determined according to the height of the piston.

Description

Technical Field

[0001] The utility model belongs to the technical field of intermediate containers, and in particular relates to a piston-type visual high-pressure resistant intermediate container. Background Art

[0002] With the increasing development of oil and gas resource development technology, displacement crude oil production technology can effectively replace crude oil in the formation and improve oil and gas recovery. In order to evaluate the oil and gas recovery rate of displacement crude oil, experimental methods are usually used to simulate crude oil displacement production. Generally, laboratories use plunger pumps to control the pressure of displacement gas and liquid, but the displaced gas and liquid are corrosive and easily cause corrosion damage to the plunger pump, so an intermediate container is required for the experiment.

[0003] However, the commonly used intermediate containers have problems such as piston rollover and blockage in experiments. Reasonable design of the intermediate container structure can solve the problems of piston rollover and blockage, and improve the stability and accuracy of displacement experiments. Utility Model Content

[0004] The utility model aims to overcome the defects in the prior art and provide a piston-type visual high-pressure resistant intermediate container with simple structure and convenient operation, which can stably control the up and down movement of the piston and prevent the piston from tipping over and clogging.

[0005] The specific technical solutions adopted by this utility model are as follows:

[0006] The utility model provides a piston-type visual high-pressure resistant intermediate container, comprising a piston, a sealing cover, an upper cover and a lower cover;

[0007] The sealing cover, upper cover and lower cover are detachably connected and together constitute a main structure with a hollow inner cavity; a piston is provided in the hollow inner cavity, and the piston can slide up and down along the inner wall of the sealing cover and seal and separate the hollow inner cavity into an upper cavity and a lower cavity that are not connected to each other; the top and bottom of the piston extend out of the upper cover and the lower cover respectively, and are sealed and slidably connected to both the upper cover and the lower cover; a temperature sensor and a pressure sensor for measuring the indicators of the hollow inner cavity are fixed on the upper cover, and an injection channel and an output channel are also provided; one end of the injection channel and the output channel are both connected to the hollow inner cavity, and the other end is connected to the outside world; a driving pressure input channel is provided on the lower cover; one end of the driving pressure input channel is connected to the hollow inner cavity, and the other end is connected to the outside world.

[0008] Preferably, a plurality of symmetrically distributed supporting feet are provided at the bottom of the lower cover.

[0009] Preferably, the upper side of the sealing cover is grooved and mounted with a sapphire glass for visually monitoring the hollow inner cavity.

[0010] Preferably, an O-ring is provided at the connection between the sealing cover and the upper cover, and an O-ring is provided at the connection between the sealing cover and the lower cover.

[0011] Preferably, the piston is coaxially arranged with the main structure.

[0012] Preferably, a bearing and a second sealing ring are provided at the connection between the top of the piston and the upper cover, and at the connection between the bottom of the piston and the lower cover, and the bearings are made of engineering plastic.

[0013] Preferably, the piston comprises an upper rod, a disc body and a lower rod which are connected in sequence and arranged coaxially, and the cross-sections of the upper rod and the lower rod are smaller than the cross-section of the disc body; the upper rod is sealingly and slidingly connected to the upper cover, the lower rod is sealingly and slidingly connected to the lower cover, and the disc body is sealingly and slidingly connected to the sealing cover.

[0014] Furthermore, the disc body is sealingly and slidably connected to the inner wall of the sealing cover through a first sealing ring and a guide ring sleeved on the outer periphery.

[0015] Preferably, the surfaces of the first sealing ring and the second sealing ring are coated with a Teflon coating for reducing friction.

[0016] Preferably, the sealing cover, upper cover, lower cover and piston are all made of 316L stainless steel.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] (1) The utility model provides a piston-type visual high-pressure intermediate container, the piston structure can prevent the piston from tipping over, clogging and other problems when the piston moves up and down, and the position of the piston can be determined by the piston height;

[0019] (2) The guide ring on the piston uses polymer bearings between the two ends of the piston and the upper and lower end covers, and the inner and outer edges of the sealing ring are covered with a low friction coefficient organic coating to reduce the friction between the piston and the container;

[0020] (3) The sapphire glass visualization window of the utility model can be used to observe the state of the displacement gas and liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a piston-type visual high-pressure resistant intermediate container;

[0022] In the figure: 1 piston; 2 temperature sensor; 3 injection channel; 4 sapphire glass; 5 first sealing ring; 6 guide ring; 7 sealing cover; 8 driving pressure input channel; 9 pressure sensor; 10 upper cover; 11 output channel; 12 second sealing ring; 13 bearing; 14 lower cover; 15 supporting foot. DETAILED DESCRIPTION

[0023] The present invention is further described and illustrated below in conjunction with the accompanying drawings and specific implementations. The technical features of each implementation of the present invention can be combined accordingly without conflicting with each other.

[0024] like Figure 1 As shown, a piston-type visual high-pressure resistant intermediate container provided by the utility model is provided. The device mainly includes a piston 1, a sealing cover 7, an upper cover 10 and a lower cover 14.

[0025] The structure and connection method of each component will be described in detail below.

[0026] In the present invention, the sealing cover 7 and the upper cover 10, and the sealing cover 7 and the lower cover 14 are all detachably connected. The sealing cover 7, the upper cover 10 and the lower cover 14 together constitute a main structure with a hollow inner cavity, which serves as the outer shell of the device of the present invention.

[0027] As a preferred embodiment of the utility model, an O-ring is provided at the connection between the sealing cover 7 and the upper cover 10, and an O-ring is provided at the connection between the sealing cover 7 and the lower cover 14, so as to play a role of sealing connection and ensure the sealing of the hollow inner cavity. A plurality of symmetrically distributed supporting feet 15 are provided at the bottom of the lower cover 14, which can raise the main structure and facilitate the transfer of the device and the up and down movement of the piston 1.

[0028] As a preferred embodiment of the present invention, the upper side of the sealing cover 7 (eg Figure 1 A sapphire glass 4 is grooved and installed at the upper left end of the hollow cavity. The sapphire glass 4 serves as an observation window, which can visually monitor the state of the displaced gas and liquid in the hollow cavity.

[0029] In the utility model, a piston 1 is provided in the hollow inner cavity, and the piston 1 can slide up and down along the inner wall of the sealing cover 7 in a sealed manner, and the pressure of the injected gas and liquid can be controlled. The piston 1 divides the hollow inner cavity into an upper cavity and a lower cavity that are not connected to each other, and the position of the piston can be determined according to the height of the piston.

[0030] As a preferred embodiment of the utility model, the piston 1 is coaxially arranged with the main structure, that is, the piston 1 and the cavity 7 are on the same central axis. The piston 1 includes an upper rod, a disc body and a lower rod which are connected in sequence and coaxially arranged, and the cross-sections of the upper rod and the lower rod are smaller than the cross-section of the disc body. The upper rod is sealingly and slidably connected to the upper cover 10, the lower rod is sealingly and slidably connected to the lower cover 14, and the disc body is sealingly and slidably connected to the sealing cover 7. The disc body is sealingly and slidably connected to the inner wall of the sealing cover 7 through the first sealing ring 5 and the guide ring 6 which are sleeved on the outer periphery. In other words, the structure of the piston 1 consists of a short and thick middle cylinder and two identical slender upper and lower cylinders. The three cylinders are on the same central axis, and the first sealing ring 5 and the guide ring 6 are located on the middle cylinder.

[0031] In actual use, the surface of the first sealing ring 5 may be coated with a coating with a low friction coefficient, such as a Teflon coating, so as to reduce the friction between the piston 1 and the container.

[0032] As a preferred embodiment of the present invention, the sealing cover 7, the upper cover 10, the lower cover 14 and the piston 1 can all be made of corrosion-resistant and high-pressure-resistant metal materials, such as 316L stainless steel. This material can withstand high pressure and prevent the intermediate container from being corroded by the injected gas and liquid.

[0033] In the utility model, the top and bottom of the piston 1 extend out of the upper cover 10 and the lower cover 14 respectively, and are sealed and slidably connected with the upper cover 10 and the lower cover 14.

[0034] As a preferred embodiment of the utility model, a bearing 13 and a second sealing ring 12 are provided at the connection between the top of the piston 1 and the upper cover 10, and a bearing 13 and a second sealing ring 12 are provided at the connection between the bottom of the piston 1 and the lower cover 14, wherein the bearing can be provided at the upper end of the connection, and the second sealing ring can be provided at the lower end of the connection. Specifically, the bearing 13 can be made of engineering plastic material (i.e., it is made of resin combined with reinforced fiber and solid by injection molding, and is corrosion-resistant), which can reduce the friction generated when the piston 1 moves up and down; the surface of the second sealing ring 12 can be coated with a coating with a low friction coefficient, such as a Teflon coating, so as to reduce the friction between the piston 1 and the container.

[0035] In the utility model, a temperature sensor 2 and a pressure sensor 9 are fixed on the upper cover 10, and the probes of the temperature sensor 2 and the pressure sensor 9 are located in the hollow inner cavity so as to measure the corresponding temperature and pressure indicators in the hollow inner cavity. An injection channel 3 and an output channel 11 are also provided on the upper cover 10. One end of the injection channel 3 and the output channel 11 are both connected to the hollow inner cavity, and the other end is connected to the outside. A driving pressure input channel 8 is provided on the lower cover 14. One end of the driving pressure input channel 8 is connected to the hollow inner cavity, and the other end is connected to the outside.

[0036] Based on the above piston-type visual high-pressure resistant intermediate container, the utility model also provides a method of use, which is specifically as follows:

[0037] Open the injection channel 3, close the output channel 11, open the driving pressure input channel 8, and inject the displacement gas and liquid into the cavity through the injection channel 3. After the injection is completed, close the injection channel 3 and open the output channel 11. The driving pressure input channel 8 is connected to the plunger pump, and the displacement gas and liquid are injected from the output channel 11 into the experimental reactor by injecting the driving liquid. In the above process, the relevant accurate parameters are obtained through the temperature sensor and the pressure sensor, and the intermediate container is rinsed with clean water after the experiment.

[0038] The above-described embodiment is only a preferred solution of the present invention, but it is not intended to limit the present invention. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present invention.

Claims

1. A piston-type visual high-pressure resistant intermediate container, characterized in that: It comprises a piston (1), a sealing cover (7), an upper cover (10) and a lower cover (14); The sealing cover (7), the upper cover (10) and the lower cover (14) are detachably connected and together constitute a main structure having a hollow inner cavity; a piston (1) is arranged in the hollow inner cavity, and the piston (1) can slide up and down in a sealed manner along the inner wall of the sealing cover (7) and divide the hollow inner cavity into an upper cavity and a lower cavity that are not connected to each other; the top and bottom of the piston (1) extend out of the upper cover (10) and the lower cover (14) respectively, and are sealed and slidably connected to the upper cover (10) and the lower cover (14); a temperature sensor (2) and a pressure sensor (9) for measuring the index of the hollow inner cavity are fixed on the upper cover (10), and an injection channel (3) and an output channel (11) are also provided; one end of the injection channel (3) and the output channel (11) are both connected to the hollow inner cavity, and the other end is connected to the outside; a driving pressure input channel (8) is provided on the lower cover (14); one end of the driving pressure input channel (8) is connected to the hollow inner cavity, and the other end is connected to the outside.

2. A piston-type visual high-pressure resistant intermediate container according to claim 1, characterized in that: The bottom of the lower cover (14) is provided with a plurality of symmetrically distributed supporting feet (15).

3. A piston-type visual high-pressure intermediate container according to claim 1, characterized in that: The upper side of the sealing cover (7) is grooved and is provided with a sapphire glass (4) for visually monitoring the hollow inner cavity.

4. The piston-type visual high-pressure intermediate container according to claim 1, characterized in that: An O-ring is provided at the connection between the sealing cover (7) and the upper cover (10), and an O-ring is provided at the connection between the sealing cover (7) and the lower cover (14).

5. The piston-type visual high-pressure resistant intermediate container according to claim 1, characterized in that: The piston (1) is coaxially arranged with the main structure.

6. The piston-type visual high-pressure resistant intermediate container according to claim 1, characterized in that: A bearing (13) and a second sealing ring (12) are provided at the connection between the top of the piston (1) and the upper cover (10), and at the connection between the bottom of the piston (1) and the lower cover (14); the bearing (13) is made of engineering plastic material, and the surface of the second sealing ring (12) is coated with a Teflon coating for reducing friction.

7. The piston-type visual high-pressure intermediate container according to claim 1, characterized in that: The piston (1) comprises an upper rod, a disc body and a lower rod which are connected in sequence and arranged coaxially, the cross sections of the upper rod and the lower rod being smaller than the cross section of the disc body; the upper rod is sealingly slidably connected to the upper cover (10), the lower rod is sealingly slidably connected to the lower cover (14), and the disc body is sealingly slidably connected to the sealing cover (7).

8. The piston-type visual high-pressure resistant intermediate container according to claim 7, characterized in that: The disc body is sealingly and slidably connected to the inner wall of the sealing cover (7) via a first sealing ring (5) and a guide ring (6) sleeved on the outer periphery.

9. The piston-type visual high-pressure resistant intermediate container according to claim 8, characterized in that: The surface of the first sealing ring (5) is coated with a Teflon coating for reducing friction.

10. The piston-type visual high-pressure intermediate container according to claim 1, characterized in that: The sealing cover (7), the upper cover (10), the lower cover (14) and the piston (1) are all made of 316L stainless steel.

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