Inorganic proppant soaking reinforcing device and soaking reinforcing method

Abstract

The invention provides an inorganic proppant soaking reinforcing device and a soaking reinforcing method, and belongs to the technical field of oil exploitation. The device comprises a tank body, a buffer tank and a liquid distribution assembly. And a support plate is arranged at the top of the opening of the tank body. A liquid inlet and a pressure balance pipe are arranged at the top of the buffer tank; and a liquid discharge pipe is arranged at the bottom of the buffer tank. The liquid distribution assembly is located in the tank body, and the top of the liquid distribution assembly is detachably connected with the lower end of the liquid discharge pipe. The inorganic proppant soaking reinforcing method is implemented based on the inorganic proppant soaking reinforcing device. The liquid distribution assembly is released from the interior of the stacked quartz sand raw material, the contact soaking process of a repairing agent solution, acid liquor or alkali liquor and the quartz sand raw material can be accelerated, the soaking repairing and reinforcing effect is guaranteed, an auxiliary stirring mode is not needed, and the situation that cracks of the quartz sand raw material are expanded under strong stirring can be avoided; the consumption of the repairing agent solution, the acid liquor or the alkali liquor is increased.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum extraction, and in particular to an inorganic proppant soaking reinforcement device and a soaking reinforcement method. Background Art

[0002] The Chinese invention (name: "An improved method for reducing the breakage rate of quartz sand proppants for petroleum fracturing and quartz sand proppants", announcement number: CN115784771B, announcement date: 20240920) discloses adding quartz sand to a repair agent solution; standing in an acidic environment or standing in an alkaline environment; drying to complete the quartz sand enhancement modification. This method uses the capillary action of the cracks in the quartz sand particles to absorb the repair agent into the cracks in the quartz sand particles themselves, complete the repair of the cracks in the quartz sand particles themselves, and improve the strength of the quartz sand.

[0003] When the above preparation process is carried out in the laboratory, the soaking reinforcement effect is relatively stable due to the small amount of corresponding quartz sand raw materials. However, when expanding industrial production, the close stacking of quartz sand raw materials is not conducive to the repair agent solution, acid or alkali solution to quickly contact with the bottom quartz sand raw materials. If stirring is used, due to the large specific gravity of quartz sand, a high-power motor is required. Summary of the invention

[0004] The present invention aims to provide an inorganic proppant soaking reinforcement device and soaking reinforcement method. By releasing the liquid distribution component from the inside of the accumulated quartz sand raw material, the contact and soaking process of the repair agent solution, acid or alkali solution with the quartz sand raw material can be accelerated, thereby ensuring the soaking repair reinforcement effect. There is no need to adopt an auxiliary stirring method, and it can also avoid the expansion of cracks in the quartz sand raw material under strong stirring, thereby increasing the consumption of the repair agent solution, acid or alkali solution.

[0005] The technical solution adopted by the present invention is:

[0006] An inorganic proppant soaking reinforcement device, comprising:

[0007] A tank body, wherein a support plate is arranged on the open top of the tank body; the two sides of the support plate are roughly symmetrical fan-shaped, the middle is roughly annular, and the inner side of the annular part is a working window; a discharge port is arranged on the outer side of the lowest part of the bottom of the tank body; a first electric switch valve is arranged on the discharge port;

[0008] A cache tank, the cache tank is located above the support plate and is generally a closed structure; a liquid inlet and a pressure balance pipe are provided on the top of the cache tank; a second electric switch valve is provided on the liquid inlet; the free end of the pressure balance pipe is bent and faces the inner bottom of the tank body; a liquid drain pipe is provided at the bottom of the cache tank; the liquid drain pipe passes through the working window, and its lower end extends into the tank body;

[0009] A liquid distribution component is located in the tank body, and its height is 1 / 2 to 2 / 3 of the internal depth of the tank body; there is a gap of 5 to 50 cm between the liquid distribution component and the adjacent side walls and bottom of the tank body; the top of the liquid distribution component is connected to the lower end of the drainage pipe.

[0010] Furthermore, a liquid level sensor is provided in the cache tank.

[0011] Furthermore, the liquid distribution assembly includes one or more circular liquid distribution parts; when there are two or more circular liquid distribution parts, the circular liquid distribution parts are connected in series in sequence.

[0012] Furthermore, the circular liquid distributing member comprises:

[0013] A connecting main pipe, both ends of which are connected;

[0014] A plurality of linear liquid distribution pipes, the linear liquid distribution pipes being evenly arranged on the circumferential outer wall of the connecting main pipe in a circumferential manner; one end of the linear liquid distribution pipe is connected to the connecting main pipe, and the other end is closed; a plurality of first liquid distribution holes are opened on the lower surface of the linear liquid distribution pipe;

[0015] A plurality of circular liquid distribution pipes, which are arranged in a concentric circle manner with the center of the connecting main pipe as the geometric center, intersecting with the linear liquid distribution pipe, and the two are internally connected; a plurality of second liquid distribution holes are opened on the lower surface of the circular liquid distribution pipe;

[0016] Among them, the lower end of the connecting main pipe of the circular liquid distribution member located at the bottom is closed; when there are two or more circular liquid distribution members, adjacent connecting main pipes are detachably connected.

[0017] Furthermore, the cross-sections of the linear liquid distribution tube and the circular liquid distribution tube are semicircular sector-shaped or pointed-angle-shaped, and each has a groove-shaped recessed area; the groove of the groove-shaped recessed area faces the bottom of the tank body, and the first liquid distribution hole and the second liquid distribution hole are located at the bottom of the groove of the groove-shaped recessed area.

[0018] Furthermore, when there are two or more circular liquid distribution members, the linear liquid distribution tubes and the circular liquid distribution tubes of two upper and lower adjacent circular liquid distribution members are arranged in a staggered manner.

[0019] Furthermore, from bottom to top, the number and / or the opening area of ​​the first liquid distribution holes and the second liquid distribution holes on the circular liquid distribution member gradually decreases.

[0020] Furthermore, a circulation pump is arranged on the fan-shaped part of one side of the support plate; the inlet pipe end of the circulation pump extends into the tank body and is provided with a filter; the outlet pipe end of the circulation pump is connected to the circulation interface arranged on the top of the cache tank through a flexible pipe.

[0021] Furthermore, the diameter of the working window is larger than the diameter of the drain pipe; limited seats are symmetrically arranged on the fan-shaped parts on both sides of the support plate, and guide grooves are correspondingly opened on the top surfaces; guide ear plates are respectively arranged on the opposite side walls of the cache tank, which are respectively inserted into the corresponding guide grooves; there is a gap between the lower part of the guide ear plate and the bottom of the guide groove; rollers are arranged on the opposite sides of the bottom of the cache tank, and the rollers are in rolling contact with the support plate; a hydraulic cylinder is also arranged on the fan-shaped part of the support plate, and the free end of the piston rod of the hydraulic cylinder is connected to the pin shaft of the guide ear plate adjacent to the side of the hydraulic cylinder.

[0022] Based on the same inventive concept, the present invention also provides an inorganic proppant soaking reinforcement method, which is implemented based on the two aforementioned inorganic proppant soaking reinforcement devices, and includes the following steps:

[0023] Step S1, quartz sand raw material is loaded into a tank of an inorganic proppant soaking reinforcement device, and does not cover the liquid distribution component;

[0024] Step S2, inputting the repair agent solution from the repair agent solution storage tank into the buffer tank, and releasing the repair agent solution directly from the accumulated quartz sand raw material by the liquid distribution component;

[0025] Step S3, when the liquid level of the repairing agent solution in the tank body is higher than the uppermost surface of the quartz sand raw material and reaches a preset height, the repairing agent solution storage tank stops inputting the repairing agent solution into the buffer tank, the circulation component extracts the repairing agent solution and inputs it into the buffer tank, and the liquid distribution component directly releases the repairing agent solution from the accumulated quartz sand raw material for internal circulation;

[0026] Step S4, after the repair agent solution is soaked for a preset time, the internal circulation is stopped, and the remaining repair agent solution and quartz sand raw materials are released;

[0027] Step S5, putting the separated quartz sand raw material into the tank of another inorganic proppant soaking and reinforcement device, and soaking with acid or alkali solution with reference to steps S2 to S3;

[0028] Step S6, after the acid or alkali solution is soaked for a preset time, the internal circulation is stopped, and the residual acid or alkali solution and the quartz sand raw material are released, washed with water, and dried to obtain a finished quartz sand proppant.

[0029] The beneficial effects of the present invention are:

[0030] Compared with the soaking method in which the repair agent solution, acid or alkali solution starts to migrate downward from the top of the piled quartz sand raw materials, the present invention provides an inorganic proppant soaking reinforcement device and soaking reinforcement method. By releasing the liquid distribution component from the inside of the piled quartz sand raw materials, the contact and soaking process of the repair agent solution, acid or alkali solution with the quartz sand raw materials can be accelerated, thereby ensuring the soaking repair and reinforcement effect. There is no need to adopt an auxiliary stirring method, and it can also avoid the expansion of cracks in the quartz sand raw materials under strong stirring, thereby increasing the consumption of the repair agent solution, acid or alkali solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a front view of the inorganic proppant soaking reinforcement device in the embodiment.

[0033] Figure 2 It is a top view of the inorganic proppant soaking reinforcement device in the embodiment.

[0034] Figure 3 The three-dimensional structure of the inorganic proppant soaking reinforcement device in the embodiment is shown in FIG. Figure 1 , wherein the side wall of the tank body is not shown.

[0035] Figure 4 The three-dimensional structure of the inorganic proppant soaking reinforcement device in the embodiment is shown in FIG. Figure 2 .

[0036] Figure 5 It is a schematic diagram of the three-dimensional structure of the combined structure of the buffer tank and the liquid distribution assembly in the embodiment.

[0037] Figure 6 It is a front view of the circular liquid distributing member in this embodiment.

[0038] Figure 7 2 is a top view of the circular liquid distributing member in this embodiment.

[0039] Figure 8 It is a bottom view of the circular liquid distributing member in this embodiment. Description of Reference Numerals

[0040] 100-tank body, 200-buffer tank, 300-liquid distribution assembly, 400-circulation assembly, 500-hydraulic cylinder.

[0041] 110 - support plate, 111 - working window, 120 - discharge port, 130 - limit seat, 131 - guide groove.

[0042] 210-liquid inlet, 220-pressure balance pipe, 230-liquid discharge pipe, 240-circulation interface, 250-guide ear plate, 260-roller.

[0043] 310 - circular liquid distribution member, 311 - connecting main pipe, 312 - linear liquid distribution pipe, 313 - first liquid distribution hole, 314 - circular liquid distribution pipe, 315 - second liquid distribution hole, 316 - groove-shaped recessed area, 317 - circular baffle.

[0044] 410-Circulation pump.

[0045] 510-piston rod, 520-pin shaft. DETAILED DESCRIPTION

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0047] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention.

[0048] The embodiments of the invention are described in detail below with reference to the accompanying drawings.

[0049] Figure 1 It is a front view of the inorganic proppant soaking reinforcement device in the embodiment. Figure 2 It is a top view of the inorganic proppant soaking reinforcement device in the embodiment. Figure 3 The three-dimensional structure of the inorganic proppant soaking reinforcement device in the embodiment is shown in FIG. Figure 1 , wherein the side wall of the tank body is not shown. Figure 4 The three-dimensional structure of the inorganic proppant soaking reinforcement device in the embodiment is shown in FIG. Figure 2 .like Figure 1~Figure 4As shown in , the inorganic proppant soaking and reinforcement device includes a tank body 100, and the internal space of the tank body 100 is the main area for the quartz sand proppant to repair the cracks of the quartz sand particles and then reinforce them after the contact between the quartz sand proppant and the repair agent solution, and the acid or alkali solution. The open top of the tank body 100 is detachably provided with a support plate 110; the two sides of the support plate 110 are roughly symmetrical fan-shaped, and the edges of the fan-shaped part can be connected to the open top of the tank body 100 through bolts and nuts (not shown in the figure); the middle of the support plate 110 is roughly annular, the annular part and the fan-shaped part are integrally formed, and the inner side of the annular part is a working window 111. A discharge port 120 is provided on the outer side of the lowest part of the bottom of the tank body 100, and a first electric switch valve (not shown in the figure) is provided on the discharge port 120, and the opening and closing of the first electric switch valve is implemented by the controller. In this embodiment, after the quartz sand raw material is put into the tank body 100, a repair agent solution, an acid solution or an alkali solution is added, and the quartz sand is left to soak to achieve crack repair and reinforcement, and finally the quartz sand can be discharged through the discharge port 120.

[0050] Figure 5 Schematic diagram of the three-dimensional structure of the combined structure of the buffer tank and the liquid distribution assembly in the embodiment. Figure 1~Figure 5As shown in , the inorganic proppant soaking and reinforcing device also includes a buffer tank 200 of a roughly closed columnar structure, which is used to buffer the repair agent solution, acid or alkali solution. The buffer tank 200 is located above the support plate 110, and a liquid inlet 210 and a pressure balance pipe 220 are arranged on the top of the buffer tank 200; the liquid inlet 210 is connected to the repair agent solution storage tank, the acid storage tank or the alkali storage tank through a flexible tube (such as a plastic hose, a metal hose, etc.), and a second electric switch valve (not shown in the figure) is arranged on the liquid inlet 210, and the opening and closing of the second electric switch valve is implemented by the controller; the free end of the pressure balance pipe 220 is bent toward the inner bottom of the tank body 100, and the free end of the pressure balance pipe 220 is located below the open top surface of the tank body 100. A drain pipe 230 is arranged at the bottom of the buffer tank 200; the drain pipe 230 passes through the working window 111, and its lower end extends into the tank body 100. In this embodiment, the repair agent solution, acid or alkali solution stored in the repair agent solution storage tank, the acid storage tank or the alkali storage tank can enter the buffer tank 200 through the flexible tube through the liquid inlet 210, and then enter the tank body 100 from the drain pipe 230 under the action of gravity, and the pressure balance pipe 220 can balance the pressure in the buffer tank 200 on the one hand, and can also guide the repair agent solution, acid or alkali solution that continues to be input to the tank body 100 after the buffer tank 200 is full, so as to avoid excessive pressure in the buffer tank 200. Moreover, the buffer tank 200 has a certain height compared with the bottom surface of the tank body 100, which can form a pressure difference. At the same time, a liquid level sensor (not shown in the figure) is arranged inside the buffer tank 200. When the liquid level sensor detects that the liquid level in the buffer tank 200 reaches the upper liquid level line, the controller controls the second electric switch valve to close, and when the liquid level sensor detects that the liquid level in the buffer tank 200 reaches the lower liquid level line, the controller controls the second electric switch valve to open.

[0051] like Figure 1~Figure 4As shown in the figure, the inorganic proppant soaking reinforcement device also includes a liquid distribution component 300; the height of the liquid distribution component 300 is 1 / 2~2 / 3 of the internal depth of the tank body 100, and the liquid distribution component 300 is located in the tank body 100, with a gap of 5~50cm between the side wall and the bottom of the adjacent tank body 100; the top of the liquid distribution component 300 is connected to the lower end of the drain pipe 230; when the quartz sand raw material is loaded into the tank body 100, at least the lower part of the liquid distribution component 300 can be submerged, or when it is fully loaded, the quartz sand raw material will completely submerge the liquid distribution component 300, and the repair agent solution released from the buffer tank 200 , acid or alkali solution is released from the liquid distribution component 300, that is, it is released from the inside of the accumulated quartz sand raw material, and the release position from bottom to top covers the lower, middle and upper parts of the accumulated quartz sand raw material. Compared with the soaking method in which the repair agent solution, acid or alkali solution migrates downward from the top of the accumulated quartz sand raw material, the liquid distribution component can speed up the contact and soaking process of the repair agent solution, acid or alkali solution with the quartz sand raw material, thereby ensuring the soaking repair and reinforcement effect, and there is no need to adopt an auxiliary stirring method, which can also avoid the expansion of cracks in the quartz sand raw material under strong stirring, thereby increasing the consumption of the repair agent solution, acid or alkali solution.

[0052] Specifically, the liquid distribution assembly 300 includes circular liquid distribution parts 310 connected in series, and the plurality of circular liquid distribution parts 310 are detachably connected, such as by threaded connection, flange connection, etc.; Figure 5 A total of nine circular liquid distributing members 310 are shown. Figure 6 It is a front view of the circular liquid distributing member in this embodiment. Figure 7 2 is a top view of the circular liquid distributing member in this embodiment. Figure 8 FIG. 2 is a bottom view of the circular liquid distributing member in this embodiment. Figures 6-8As shown in the figure, the circular liquid distribution member 310 has a connecting main pipe 311 with two ends connected. A number of linear liquid distribution pipes 312 are evenly arranged in a circular manner on the circumferential outer wall of the connecting main pipe 311; one end of the linear liquid distribution pipe 311 is connected to the connecting main pipe 311, and the other end of the linear liquid distribution pipe 311 is closed; a number of first liquid distribution holes 313 in the form of circular holes are opened on the lower surface of the linear liquid distribution pipe 311 (i.e., the side facing the bottom surface of the tank body 100). A number of circular liquid distribution pipes 314 in the form of concentric circles are arranged on the outer side of the connecting main pipe 311 with the center of the connecting main pipe 311 as the geometric center; the circular liquid distribution pipe 314 intersects with the linear liquid distribution pipe 311, and the two are connected internally; a number of second liquid distribution holes 315 in the form of arc openings are opened on the lower surface of the circular liquid distribution pipe 314 (i.e., the side facing the bottom surface of the tank body 100). When multiple circular liquid distribution parts 310 are combined in the height direction of the tank body 100, two adjacent connecting main pipes 311 are connected in series by means of threaded connection or flange connection; the upper end of the connecting main pipe 311 of the circular liquid distribution part 310 located at the top is connected to the discharge pipe 230 by means of threaded connection or flange connection, and the lower end of the connecting main pipe 311 of the circular liquid distribution part 310 located at the bottom is blocked by a plug; the gap between the free end of the linear liquid distribution pipe 311 and the inner wall of the tank body 100 is 5~50cm, and the gap between the linear liquid distribution pipe 311 of the circular liquid distribution part 310 located at the bottom and the bottom wall of the tank body 100 is 5~50cm, and the lower end of the connecting main pipe 311 does not touch the bottom wall of the tank body 100; thus, the circular liquid distribution part 310 composed of multiple circular liquid distribution parts 310 is suspended and arranged in the lower part of the tank body 100. The repair agent solution, acid or alkali solution released from the buffer tank 200 is evenly released from the first liquid distribution hole 313 of the linear liquid distribution tube 312 of the circular liquid distribution part 310 at different heights and the second liquid distribution hole 315 of the circular liquid distribution tube 314 under the action of pressure difference, and contacts with the quartz sand raw materials at different heights inside the accumulated quartz sand raw materials to be soaked, repaired and reinforced.

[0053] Furthermore, in this embodiment, in order to facilitate the uniform release of the repairing agent solution, acid or alkali solution from the first liquid distribution hole 313 of the linear liquid distribution tube 312 and the second liquid distribution hole 315 of the circular liquid distribution tube 314 to prevent hole blockage and form a liquid distribution empty area, the cross-sections of the linear liquid distribution tube 312 and the circular liquid distribution tube 314 are semicircular fan-shaped or pointed, that is, the linear liquid distribution tube 312 and the circular liquid distribution tube 314 each have a groove-shaped recessed area 316, such as Figure 4As shown in . The notch of the groove-shaped recessed area 316 faces the bottom of the tank body 100, and the first liquid distribution hole 313 and the second liquid distribution hole 315 are located at the bottom of the groove of the groove-shaped recessed area 316; at the same time, a circular baffle 317 is provided at the free end of the linear liquid distribution pipe 312 to block the long end of the quartz sand raw material from entering the groove-shaped recessed area 316. When the quartz sand raw material naturally accumulates in the tank body 100, the groove side wall of the groove-shaped recessed area 316 blocks it, and no quartz sand raw material gathers near the bottom of the groove of the groove-shaped recessed area 316, forming a liquid distribution empty area, which increases the contact area between the repair agent solution, acid or alkali solution and the quartz sand raw material, and at the same time, the quartz sand particles are not easy to block the first liquid distribution hole 313 and the second liquid distribution hole 315.

[0054] Furthermore, in this embodiment, in order to allow the repairing agent solution, acid or alkali solution to cover more release positions inside the accumulated quartz sand raw materials, the positions of the linear liquid distribution pipes 312 and the circular liquid distribution pipes 314 of the two adjacent circular liquid distribution parts 310 are staggered. In addition, from bottom to top, the number and / or opening area of ​​the first liquid distribution holes 313 and the second liquid distribution holes 315 on the circular liquid distribution parts 310 gradually decrease.

[0055] like Figure 1~Figure 4 As shown in , the inorganic proppant soaking and reinforcement device also includes a circulation component 400. The circulation component 400 has a circulation pump 410, which is arranged on the fan-shaped part of one side of the support plate 100; the inlet pipe end of the circulation pump 410 extends into the tank body 100, submerged below the liquid level of the repair agent solution, acid solution or alkali solution, and is provided with a filter (not shown in the figure) carrying filter materials such as a filter screen and a filter sponge; the outlet pipe end of the circulation pump 410 is connected to the circulation interface 240 arranged on the top of the buffer tank 200 through a flexible pipe (such as a plastic hose, a metal hose, etc.). At the later stage of soaking, the repair agent solution storage tank, the acid storage tank or the alkali storage tank no longer replenishes new repair agent solution, acid or alkali into the tank body 100, and the repair agent solution, acid or alkali in the upper layer of the tank body 100 is extracted by the circulation pump 410 and pumped into the buffer tank 200, and the liquid distribution component 300 refills the lower part of the quartz sand raw material for internal circulation, thereby improving the concentration uniformity of the repair agent solution, acid or alkali in the tank body 100. At the same time, in this embodiment, when the liquid level sensor detects that the liquid level in the buffer tank 200 reaches the upper liquid level line, the controller controls the circulation pump 410 to be turned off, and when the liquid level sensor detects that the liquid level in the buffer tank 200 reaches the lower liquid level line, the controller controls the circulation pump 410 to be turned on.

[0056] like Figures 1 to 4As shown in the figure, the limiting seats 130 are symmetrically arranged on the fan-shaped parts on both sides of the support plate 100, the distance between the two limiting seats 130 is greater than the diameter of the buffer tank 200, and the diameter of the working window 111 is greater than the diameter of the drain pipe 230; two guide through grooves 131 are correspondingly opened on the top surfaces of the two limiting seats 130. A hydraulic cylinder 500 is also arranged on the fan-shaped part on the other side of the support plate 100, and the piston rod 510 of the hydraulic cylinder 500 is roughly in the diameter direction of the buffer tank 200. Two guide ear plates 250 are respectively arranged on the side walls opposite to each other in the diameter direction of the buffer tank 200, and the lower parts of the guide ear plates 250 are respectively inserted into the corresponding guide grooves 131, and there is a gap between the lower parts of the guide ear plates 250 and the bottom of the guide grooves 131; the free end of the piston rod 510 of the hydraulic cylinder 500 is connected to the guide ear plate 250 on the side adjacent to the hydraulic cylinder 500 by a pin, for example, the free end of the piston rod 510 extends between the two guide ear plates 250, and is penetrated by a pin 520, and the diameter of the hole on the guide ear plate 250 for the pin 520 to pass through is larger than the diameter of the pin 520; at the same time, the piston rod 510 does not touch the limit seat 130. Rollers 260 are arranged on opposite sides of the bottom radial direction of the buffer tank 200, and the rollers 260 are in rolling contact with the support plate 110. In this embodiment, when the controller detects that the liquid level height in the buffer tank 200 is falling at a speed significantly lower than a preset threshold value, that is, the first liquid distribution hole 313 and the second liquid distribution hole 315 are not releasing the repair agent solution, acid or alkali solution smoothly, the hydraulic cylinder 500 is started to repeatedly push the buffer tank 500 to move back and forth quickly (for example, 10 times / min) with a small amplitude (for example, the stroke of the piston rod is 1~5cm), thereby driving the suspended liquid distribution component 300 to shake in situ, for example, the liquid distribution component 300 is slightly lifted and laid flat at the same time, thereby changing the local accumulation structure of the quartz sand raw material and clearing the blockage.

[0057] When the inorganic proppant soaking and reinforcement method is implemented by using the aforementioned inorganic proppant soaking and reinforcement device, two inorganic proppant soaking and reinforcement devices are designed and used, one of which is firstly soaked in the repair solution, and then the other inorganic proppant soaking and reinforcement device soaks the quartz sand soaked in the repair agent solution with acid or alkali solution, which specifically includes the following processes:

[0058] Step S1, quartz sand raw material is loaded into a tank 100 of an inorganic proppant soaking reinforcement device, and does not cover the liquid distribution component 300;

[0059] Step S2, inputting the repair agent solution from the repair agent solution storage tank into the buffer tank 200, and releasing the repair agent solution directly from the accumulated quartz sand raw material by the liquid distribution component 300;

[0060] Step S3, when the liquid level of the repairing agent solution in the tank body 100 is higher than the uppermost surface of the quartz sand raw material to a preset height, the repairing agent solution storage tank stops inputting the repairing agent solution into the buffer tank 200, the circulation component 400 extracts the repairing agent solution in the upper layer of the tank body 100 and inputs it into the buffer tank 200, and the liquid distribution component 300 directly releases the repairing agent solution from the accumulated quartz sand raw material for internal circulation;

[0061] Step S4, after the repair agent solution is soaked for a preset time, the internal circulation is stopped, and the remaining repair agent solution and quartz sand raw materials are released;

[0062] Step S5, putting the separated quartz sand raw material into the tank 100 of another inorganic proppant soaking and reinforcement device, and soaking with acid or alkali solution with reference to steps S2 to S3;

[0063] Step S6, after the acid or alkali solution is soaked for a preset time, the internal circulation is stopped, and the residual acid or alkali solution and the quartz sand raw material are released, washed with water, and dried to obtain a finished quartz sand proppant.

[0064] In this embodiment, the liquid distribution component is used to release from the inside of the accumulated quartz sand raw material, which can accelerate the contact and immersion process of the repair agent solution, acid or alkali solution with the quartz sand raw material, ensuring the immersion repair and reinforcement effect, and there is no need to adopt an auxiliary stirring method. It can also avoid the expansion of cracks in the quartz sand raw material under strong stirring, and increase the consumption of the repair agent solution, acid or alkali solution.

Claims

1. An inorganic proppant soaking reinforcement device, characterized in that: include: A tank body, wherein a support plate is arranged on the open top of the tank body; the two sides of the support plate are roughly symmetrical fan-shaped, the middle is roughly annular, and the inner side of the annular part is a working window; a discharge port is arranged on the outer side of the lowest part of the bottom of the tank body; a first electric switch valve is arranged on the discharge port; A cache tank, the cache tank is located above the support plate and is generally a closed structure; a liquid inlet and a pressure balance pipe are provided on the top of the cache tank; a second electric switch valve is provided on the liquid inlet; the free end of the pressure balance pipe is bent and faces the inner bottom of the tank body; a liquid drain pipe is provided at the bottom of the cache tank; the liquid drain pipe passes through the working window, and its lower end extends into the tank body; A liquid distribution component is located in the tank body, and its height is 1 / 2 to 2 / 3 of the internal depth of the tank body; there is a gap of 5 to 50 cm between the liquid distribution component and the adjacent side walls and bottom of the tank body; the top of the liquid distribution component is connected to the lower end of the drainage pipe.

2. The inorganic proppant soaking reinforcement device according to claim 1, characterized in that: A liquid level sensor is arranged in the cache tank.

3. The inorganic proppant soaking reinforcement device according to claim 1, characterized in that: The liquid distribution assembly includes one or more circular liquid distribution parts; when there are two or more circular liquid distribution parts, the circular liquid distribution parts are connected in series in sequence.

4. The inorganic proppant soaking reinforcement device according to claim 3, characterized in that: The circular liquid distributing member comprises: A connecting main pipe, both ends of which are connected; A plurality of linear liquid distribution pipes, the linear liquid distribution pipes being evenly arranged on the circumferential outer wall of the connecting main pipe in a circumferential manner; one end of the linear liquid distribution pipe is connected to the connecting main pipe, and the other end is closed; a plurality of first liquid distribution holes are opened on the lower surface of the linear liquid distribution pipe; A plurality of circular liquid distribution pipes, which are arranged in a concentric circle manner with the center of the connecting main pipe as the geometric center, intersecting with the linear liquid distribution pipe, and the two are internally connected; a plurality of second liquid distribution holes are opened on the lower surface of the circular liquid distribution pipe; Among them, the lower end of the connecting main pipe of the circular liquid distribution member located at the bottom is closed; when there are two or more circular liquid distribution members, adjacent connecting main pipes are detachably connected.

5. The inorganic proppant soaking reinforcement device according to claim 4, characterized in that: The cross-sections of the linear liquid distribution tube and the circular liquid distribution tube are semicircular sector-shaped or pointed-angle-shaped, and each has a groove-shaped recessed area; the groove of the groove-shaped recessed area faces the bottom of the tank body, and the first liquid distribution hole and the second liquid distribution hole are located at the bottom of the groove of the groove-shaped recessed area.

6. The inorganic proppant soaking reinforcement device according to claim 4 or 5, characterized in that: When there are two or more circular liquid distribution members, the linear liquid distribution tubes and the circular liquid distribution tubes of two upper and lower adjacent circular liquid distribution members are arranged alternately.

7. The inorganic proppant soaking reinforcement device according to claim 6, characterized in that: From bottom to top, the number and / or the area of ​​the first liquid distribution holes and the second liquid distribution holes on the circular liquid distribution member gradually decrease.

8. The inorganic proppant soaking reinforcement device according to any one of claims 1 to 5 and 7, characterized in that: A circulation pump is arranged on the fan-shaped part on one side of the support plate; the inlet pipe end of the circulation pump extends into the tank body and is provided with a filter; the outlet pipe end of the circulation pump is connected to the circulation interface arranged on the top of the cache tank through a flexible pipe.

9. The inorganic proppant soaking reinforcement device according to claim 8, characterized in that: The diameter of the working window is larger than the diameter of the drain pipe; limited seats are symmetrically arranged on the fan-shaped parts on both sides of the support plate, and guide grooves are correspondingly opened on the top surfaces; guide ear plates are respectively arranged on the opposite side walls of the cache tank, which are respectively inserted into the corresponding guide grooves; there is a gap between the lower part of the guide ear plate and the bottom of the guide groove; rollers are arranged on the opposite sides of the bottom of the cache tank, and the rollers are in rolling contact with the support plate; a hydraulic cylinder is also arranged on the fan-shaped part of the support plate, and the free end of the piston rod of the hydraulic cylinder is connected to the pin shaft of the guide ear plate adjacent to the side of the hydraulic cylinder.

10. An inorganic proppant soaking reinforcement method, characterized in that: Based on two inorganic proppant soaking reinforcement devices as claimed in claim 8 or 9, the method comprises the following steps: Step S1, quartz sand raw material is loaded into a tank of an inorganic proppant soaking reinforcement device, and does not cover the liquid distribution component; Step S2, inputting the repair agent solution from the repair agent solution storage tank into the buffer tank, and releasing the repair agent solution directly from the accumulated quartz sand raw material by the liquid distribution component; Step S3, when the liquid level of the repair agent solution in the tank body is higher than the uppermost surface of the quartz sand raw material and reaches a preset height, the repair agent solution storage tank stops inputting the repair agent solution into the buffer tank, the circulation component extracts the repair agent solution in the upper layer of the tank body and inputs it into the buffer tank, and the liquid distribution component directly releases the repair agent solution from the accumulated quartz sand raw material for internal circulation; Step S4, after the repair agent solution is soaked for a preset time, the internal circulation is stopped, and the remaining repair agent solution and quartz sand raw materials are released; Step S5, putting the separated quartz sand raw material into the tank of another inorganic proppant soaking and reinforcement device, and soaking with acid or alkali solution with reference to steps S2 to S3; Step S6, after the acid or alkali solution is soaked for a preset time, the internal circulation is stopped, and the residual acid or alkali solution and the quartz sand raw material are released, washed with water, and dried to obtain a finished quartz sand proppant.

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