A separated gas-liquid permeation displacement device and method

Abstract

This invention discloses a separate gas-liquid permeation displacement device and method. The device includes a high-pressure main material chamber, a high-pressure distribution chamber, and a sealed communication assembly. A high-pressure water supply unit is connected to a first material chamber; a gas supply unit is connected to a second material chamber, and each high-pressure distribution chamber is provided with an inlet connected to the corresponding second material chamber. The open sealed communication assembly allows material in the second material chamber to enter the first material chamber. A propulsion component for pushing the material in the first material chamber is movably arranged along the extension direction in the first material chamber, and an outlet is formed at one end of the high-pressure main material chamber along the moving direction of the propulsion component. This invention effectively separates the displacement process by pre-permeating the ore with high-pressure gas and then further displacing it with high-pressure water, thereby effectively avoiding various problems in the water-driven gas process, greatly shortening the displacement time, improving displacement efficiency, and reducing displacement costs.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of displacement technology, and in particular to a separate gas-liquid permeation displacement device and method. Background Art

[0002] At present, displacement technology is widely used in coalbed methane mining and improving oil and gas recovery. In the actual displacement process, different displacement media such as water, CO2, and N2 can be selected according to production needs. Experiments have confirmed that through the displacement process, the working medium can be efficiently replaced, saving the consumption of the replaced medium.

[0003] Under the existing process conditions, the conventional displacement method is to directly inject high-pressure water into the high-pressure test chamber through a water pump to displace the free high-pressure gas out of the high-pressure test chamber. However, this type of displacement method can often only meet the existing small-scale displacement needs. In the large-scale displacement process, especially when the filler is well graded or has a large density, due to the large difference between the water injection port area and the cross-sectional area of ​​the high-pressure test chamber, it is often easy to cause a dominant channel when water drives the gas, and the surface propulsion of water cannot be achieved, which ultimately leads to incomplete water drive and a large amount of gas still exists between the ores. Therefore, it is necessary to conceive a displacement method to achieve the ideal state that the ore is saturated with gas and the space between the ores is filled with water. Summary of the invention

[0004] To this end, an embodiment of the present invention provides a separate gas-liquid permeation displacement device and method, which effectively separates the displacement process, makes the ore uniformly infiltrated by high-pressure gas in advance, and then further displaces it by high-pressure water, thereby effectively avoiding various problems in the water-gas displacement process, thereby greatly shortening the displacement time, improving the displacement efficiency, and reducing the displacement cost.

[0005] In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

[0006] In one aspect of an embodiment of the present invention, a separate gas-liquid permeation displacement device is provided, comprising a high-pressure main silo with a first material cavity, at least one high-pressure sub-silo with a second material cavity, and a sealing connection component capable of connecting the first material cavity with the second material cavity in an open or closed manner; wherein:

[0007] The first material chamber is connected to a high-pressure water supply unit for supplying high-pressure water to the first material chamber;

[0008] The second material cavity is connected to a gas supply unit for providing high-pressure gas to the second material cavity, and each of the high-pressure sub-bins is also provided with a feed port connected to the corresponding second material cavity;

[0009] Opening the sealing communication component enables the material in the second material cavity to enter the first material cavity;

[0010] A propulsion member for pushing the material body in the first material cavity is movably provided in the first material cavity along the extension direction, and a discharge port is formed on one end of the high-pressure main material bin along the moving direction of the propulsion member.

[0011] As a preferred solution of the present invention, the cross-sectional area of ​​the second material cavity is not greater than the cross-sectional area of ​​the first material cavity.

[0012] As a preferred solution of the present invention, there are multiple high-pressure material sub-bins, and the cross-sectional area of ​​each of the second material chambers is not greater than half of the cross-sectional area of ​​the first material chamber.

[0013] As a preferred solution of the present invention, the sum of the volumes of the plurality of second material cavities is equal to the volume of the first material cavity.

[0014] As a preferred solution of the present invention, there are two high-pressure material sub-bins, and the sum of the volumes of the two second material chambers is equal to the volume of the first material chamber.

[0015] As a preferred solution of the present invention, the sealing connecting component includes at least a valve arranged on the first material chamber and / or the second material chamber, and the material inlet and the gas injection port of the gas supply unit are located at one end of the high-pressure sub-bin away from the high-pressure main bin.

[0016] As a preferred solution of the present invention, the sealed connecting component also includes a pipe fitting connected between the high-pressure main material bin and the high-pressure sub-material bin, the pipe fitting includes a main pipe body connected to the high-pressure main material bin, and at least one side pipe body extending from the side wall of the main pipe body, each of the side pipe bodies is installed in a sealed connection with one of the high-pressure sub-material bins.

[0017] As a preferred solution of the present invention, the main pipe body comprises a first pipe segment, a connecting portion and a second pipe segment formed in sequence along the axial direction, and the side pipe body extends obliquely outward from the connecting portion toward one end where the first pipe segment is located;

[0018] The second pipe section is tightly connected to the high-pressure main silo via an intermediate connecting piece.

[0019] As a preferred solution of the present invention, a clamping piece for limiting the piston is further formed on the inner wall of the end of the high-pressure main material bin away from the main pipe body;

[0020] The piston is movably arranged between the first pipe section and the clamping member, and a restoring torque providing unit for providing a restoring force for the piston to return to the clamping member is formed between the piston and the end of the first pipe section.

[0021] As a preferred solution of the present invention, relative to the clamping piece, the water injection port of the high-pressure water supply unit is located at one end of the high-pressure main silo away from the high-pressure sub-silo.

[0022] As a preferred solution of the present invention, a water inlet and outlet are further provided on the side surface of one end of the high-pressure sub-bin close to the high-pressure main bin.

[0023] As a preferred solution of the present invention, the high-pressure main silo and the high-pressure sub-silo are also supported and connected by a supporting structure.

[0024] In another aspect of the embodiment of the present invention, a separate gas-liquid osmotic displacement method is provided, using the separate gas-liquid osmotic displacement device described above, and the separate gas-liquid osmotic displacement method comprises:

[0025] S100, introducing high-pressure water into the first material chamber to drive the propulsion member to return to the end away from the discharge port;

[0026] S200, closing the sealing communication component, introducing the material and high-pressure gas into the second material chamber, and completing the pretreatment of the material;

[0027] S300, adjusting the ratio between the pressure in the first cavity and the pressure in the second cavity to 0.95-1.05, opening the sealing connection assembly, so that the material pretreated in step S200 falls into the first cavity, and at the same time, part of the high-pressure water in the first cavity enters the second cavity;

[0028] S400, closing the sealing communication component to complete the separate osmotic displacement of the material body in the first material chamber;

[0029] S500, using a propulsion member to move the material body after the infiltration displacement is completed.

[0030] It should be noted that, in actual operation, the pressure in the first material chamber in step S300 is preferably equal to the pressure in the second material chamber, that is, when the sealed connecting component is opened, there is no pressure difference between the two material chambers, and the material body falls directly into the first material chamber depending on its own mass.

[0031] The embodiments of the present invention have the following advantages:

[0032] The present invention physically separates the ore penetration saturation process from the subsequent water displacement, and drops the ore after high-pressure gas penetration saturation into the water to complete the entire displacement process. The technical solution of the present invention replaces the conventional operation of directly displacing the free gas between the ores in the main material bin by water injection, effectively avoiding the disadvantages of unsmooth water displacement caused by good gradation and high density of the ore, and avoiding the phenomenon of "water-enclosed gas" caused by incomplete displacement, achieving physical separation of the displacement environment, effectively avoiding the problem of incomplete gas displacement, improving the displacement efficiency when coarse and fine particles are mixed, and reducing the displacement cost and displacement time. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0034] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0035] Figure 1 A schematic structural diagram of a separate gas-liquid permeation displacement device provided in an embodiment of the present invention;

[0036] Figure 2 A schematic diagram of the local structure of the connection between the pipe fitting and the high-pressure main silo provided in an embodiment of the present invention;

[0037] Figure 3 A flow chart of a separate gas-liquid permeation displacement method provided in an embodiment of the present invention.

[0038] In the figure:

[0039] 1-high-pressure main silo; 2-high-pressure sub-silo; 4-high-pressure gas supply unit; 6-support structure;

[0040] 11-first material chamber; 12-propelling member; 13-discharging port; 14-clamping member;

[0041] 21-second material cavity; 22-feeding port; 23-water inlet and outlet;

[0042] 31-valve; 32-main pipe body; 33-side pipe body; 34-intermediate connecting piece;

[0043] 321-first pipe section; 322-connecting portion; 323-second pipe section;

[0044] 41-gas injection port;

[0045] 51-Water injection port. DETAILED DESCRIPTION

[0046] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are 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.

[0047] The specific implementation modes of the present invention are described in detail below with reference to the accompanying drawings.

[0048] like Figure 1 As shown, the present invention provides a separate gas-liquid permeation displacement device. Specifically, it includes a high-pressure main silo 1, at least one (preferably multiple) high-pressure sub-silos 2 connected to the high-pressure main silo 1 through pipes; a support structure 6 for supporting and connecting the high-pressure main silo 1 and the high-pressure sub-silo 2; a propeller 12 (specifically a piston) located at the upper part of the high-pressure main silo 1, and a clamping member 14 (specifically a bull leg step provided through, used to limit the lower limit of movement of the piston inside) located at the lower part of the high-pressure main silo 1; an intermediate connector 34 for matching and connecting the high-pressure main silo 1 and the pipe; a valve 31 for connecting the high-pressure main silo 1 and the high-pressure sub-silo 2; and a gas storage tank (i.e., a high-pressure gas supply unit 4) for conveying high-pressure gas to the high-pressure sub-silo 2. In addition, a water injection port 51 is provided on the high-pressure main silo 1, and a feed port 22, a water inlet and outlet 23, and a gas injection port 41 are provided on the high-pressure sub-silo 2.

[0049] Furthermore, the support structure 6 can be configured as a frame structure. The pipe fittings can be further configured in the support structure 6 (i.e., the pipe fittings are located inside the frame structure so that the support structure 6 can provide better support for the entire device), and the pipe fittings are configured as a structure having a main pipe body 32 and a side pipe body 33, such as Figure 2As shown, the main pipe body 32 extends vertically in the axial direction, and the side pipe body 33 extends obliquely upward from the side of the main pipe body 32 in the axial direction. Furthermore, the main pipe body 32 is connected to the high-pressure main silo 1 through the intermediate connector 34, and the side pipe body 33 is connected to the high-pressure sub-silo 2 to fix the relative position between the high-pressure main silo 1 and the high-pressure sub-silo 2. It should be noted that although the structure of the pipe fitting is separately described as including the main pipe body 32 and the side pipe body 33, preferably, the pipe fitting here is an integrated structure.

[0050] The piston is initially located at the top of the main body 32, and moves downward to push the ore and water (i.e., the material in the high-pressure main silo 1) out of the first material chamber 11 through the discharge port 13; the piston finally stops at the corbel step. The corbel step and the high-pressure main silo 1 are sealed by a sealing ring. The end of the high-pressure sub-silo 2 close to the high-pressure main silo 1 is connected to the pipe fitting (mainly the side pipe body 33) located in the support structure 6 through an external thread.

[0051] In the above structure, the high-pressure main silo 1 is used to hold high-pressure water; the high-pressure sub-silo 2 is used to hold ore (i.e., the material to be processed) and high-pressure gas. The water pressure in the high-pressure main silo 1 and the air pressure in the high-pressure sub-silo 2 are roughly equivalent, so that when the valve 31 is opened, the ore infiltrated with high-pressure gas in the high-pressure sub-silo 2 can fall into the high-pressure main silo 1 based on factors such as gravity. It should be noted here that the pressures of the two do not have to be exactly the same, as long as the problem of the ore being unable to fall into the high-pressure main silo 1 due to the pressure difference when the valve 31 is opened is avoided. Furthermore, the total volume of the second material chambers 21 inside the multiple high-pressure sub-silos 2 needs to be roughly equal to the volume of the high-pressure main silo 1 to ensure that all the ores contained in the multiple high-pressure sub-silos 2 can basically fill the high-pressure main silo 1. For example, Figure 1 As shown, two high-pressure sub-bins 2 are provided, and preferably, the two second material chambers 21 have the same volume, and each is approximately half of the first material chamber 11. Similarly, it is not required that the volumes of the two are completely consistent, and those skilled in the art can adjust accordingly within a certain error range according to actual conditions.

[0052] In a more specific actual operation process, when it is necessary to inject gas into the ore in the high-pressure sub-bin 2 to saturate it, close the valve 31, load the ore into the high-pressure sub-bin 2 from the feed port 22, and fill it with high-pressure gas through the gas injection port 41 to saturate the ore; at the same time, the water pressure in the high-pressure main bin 1 is increased (i.e., high-pressure water is injected into the high-pressure main bin 1 through the water injection port 51) to ensure that the water pressure in the high-pressure main bin 1 is equal to the air pressure in the high-pressure sub-bin 2. When the ore is saturated, open the valve 31, and the ore falls into the high-pressure main bin 1 through the pipe fittings, so that the ore is saturated with high-pressure gas, and the space between the ores is filled with water, completing the displacement of the gas by water. At this time, the excess water squeezed out of the high-pressure main bin 1 by the ore will enter the high-pressure sub-bin 2, and then the water inlet and outlet 23 can be opened according to the actual situation to discharge the water entering the high-pressure sub-bin 2.

[0053] The number of high-pressure sub-bins 2 can be selected according to actual conditions. Figure 1 As shown, in a specific embodiment of the present invention, the number of high-pressure sub-bins 2 is two. It should be noted that the present invention is not limited to this, and the number of high-pressure sub-bins 2 can be set to multiple according to actual conditions. In a further preferred embodiment, the multiple high-pressure sub-bins 2 are arranged at equal intervals along the circumferential direction on the pipe 4, so that the overall material drop from the high-pressure sub-bin 2 to the high-pressure main bin 1 below is more uniform.

[0054] The present invention further discloses a separation type gas-liquid permeation displacement method, specifically:

[0055] S100, close the valve 31, inject water into the high-pressure main silo 1 through the water injection port 51, and reset the piston to the top of the pipe fitting (specifically the main pipe body 32 here);

[0056] S200, putting ores into the corresponding high-pressure sub-bins 2 through the multiple feed ports 22, turning on the high-pressure gas supply unit 4, and injecting high-pressure gas into the corresponding high-pressure sub-bins 2 through the gas injection ports 41;

[0057] S300, after the ore is saturated, the valve 31 is opened to allow the saturated ore to fall into the high-pressure main silo 1. Part of the water in the high-pressure main silo 1 will overflow due to the addition of the ore and enter the high-pressure sub-silo 2;

[0058] S400, close the valve 31, and inject water into the corresponding high-pressure sub-bin 2 through the water inlet and outlet 23 to compress the high-pressure gas therein into the gas storage tank of the high-pressure gas providing unit;

[0059] S500, closing the gas injection port 41, and discharging the water in the corresponding high-pressure sub-bin 2 through the water inlet and outlet 23 to complete the displacement.

[0060] The separate displacement device and method provided by the present invention avoids the conventional method of directly displacing the free gas between the ores by water injection. Based on the physical separation of the displacement environment, it can avoid the drawbacks of the water-displacing gas not being smooth due to the good gradation and high density of the ore materials, as well as the incomplete gas displacement, and avoids the phenomenon of "water-enclosed gas" caused by incomplete displacement, improves the displacement efficiency when the coarse and fine particles are mixed, and greatly reduces the displacement cost and displacement time. In addition, the present invention is based on the gas-liquid separation type of osmotic displacement, and adopts multiple high-pressure sub-bins with smaller loading spaces to fill gas, and cooperates with a high-pressure main bin with larger loading space to fill water. Without adding any other structures or improving other operating methods, it can greatly reduce the difficulty of making a large-diameter high-pressure main bin that should be filled with high-pressure gas, and improve the safety and reliability of the high-pressure main bin, while also reducing the overall equipment processing cost.

[0061] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A separate gas-liquid permeation displacement device, characterized in that: The invention comprises a high-pressure main material bin (1) having a first material cavity (11), at least one high-pressure sub-material bin (2) having a second material cavity (21), and a sealing connection component capable of connecting the first material cavity (11) and the second material cavity (21) in an open or closed manner; wherein: The first material chamber (11) is connected to a high-pressure water supply unit for supplying high-pressure water to the first material chamber (11); The second material cavity (21) is connected to a high-pressure gas supply unit (4) for supplying high-pressure gas to the second material cavity (21), and each of the high-pressure material sub-bins (2) is also provided with a material inlet (22) connected to the corresponding second material cavity (21); Opening the sealing communication component enables the material in the second material cavity (21) to enter the first material cavity (11); A pushing member (12) for pushing the material body in the first material chamber (11) is movably provided in the first material chamber (11) along the extension direction, and a material outlet (13) is formed on one end of the high-pressure main material bin (1) along the moving direction of the pushing member (12); The sealed communication component comprises a pipe fitting connected between the high-pressure main material bin (1) and the high-pressure sub-material bin (2), the pipe fitting comprising a main pipe body (32) in communication with the high-pressure main material bin (1), and at least one side pipe body (33) extending from a side wall of the main pipe body (32), each of the side pipe bodies (33) being installed in sealed communication with one of the high-pressure sub-material bins (2); The main pipe body (32) comprises a first pipe section (321), a connecting portion (322) and a second pipe section (323) formed in sequence along the axial direction, and the side pipe body (33) extends obliquely outward from the connecting portion (322) toward an end where the first pipe section (321) is located; The second pipe section (323) is hermetically connected to the high-pressure main material bin (1) via an intermediate connecting piece (34); The propulsion member (12) is a piston, and a clamping member (14) for limiting the position of the piston is formed on the inner wall of the end of the high-pressure main material bin (1) away from the main pipe (32); The piston is movably arranged between the first pipe section (321) and the clamping member (14), and a reset torque providing unit for providing a reset force for the piston to reset to the clamping member (14) is formed between the piston and the end of the first pipe section (321); Relative to the clamping member (14), the water injection port (51) of the high-pressure water supply unit is located at an end of the high-pressure main silo (1) away from the high-pressure sub-silo (2); A water inlet and outlet (23) is also provided on the side surface of one end of the high-pressure sub-bin (2) close to the high-pressure main bin (1).

2. A separate gas-liquid permeation displacement device according to claim 1, characterized in that: The cross-sectional area of ​​the second material cavity (21) is not greater than the cross-sectional area of ​​the first material cavity (11).

3. A separate gas-liquid permeation displacement device according to claim 2, characterized in that: The number of the high-pressure material distribution bins (2) is multiple.

4. A separate gas-liquid permeation displacement device according to claim 2, characterized in that: The sum of the volumes of the plurality of second material chambers (21) is equal to the volume of the first material chamber (11).

5. A separate gas-liquid permeation displacement device according to claim 4, characterized in that: There are two high-pressure material sub-bins (2), and the sum of the volumes of the two second material chambers (21) is equal to the volume of the first material chamber (11).

6. A separate gas-liquid permeation displacement device according to claim 1 or 2, characterized in that: The sealed communication component comprises at least a valve (31) arranged on the first material chamber (11) and / or the second material chamber (21), and the material inlet (22) and the gas injection port (41) of the high-pressure gas supply unit (4) are located at one end of the high-pressure sub-silo (2) away from the high-pressure main silo (1).

7. The separate gas-liquid permeation displacement device according to any one of claims 1 to 5, characterized in that: The high-pressure main material bin (1) and the high-pressure sub-material bin (2) are also supported and connected via a support structure (6).

8. A separation type gas-liquid permeation displacement method, characterized in that: Using the separate gas-liquid permeation displacement device according to any one of claims 1 to 7, the separate gas-liquid permeation displacement method comprises: S100, introducing high-pressure water into the first material chamber to drive the propulsion member to return to the end away from the discharge port; S200, closing the sealing communication component, introducing the material and high-pressure gas into the second material chamber, and completing the pretreatment of the material; S300, adjusting the ratio between the pressure in the first cavity and the pressure in the second cavity to 0.95-1.05, opening the sealing connection assembly, so that the material pretreated in step S200 falls into the first cavity, and at the same time, part of the high-pressure water in the first cavity enters the second cavity; S400, closing the sealing communication component to complete the separate osmotic displacement of the material body in the first material chamber; S500, using a propulsion member to move the material body after the infiltration displacement is completed.

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