An Acid Etching of Rock Plate and Evaluation of Diversion Chambers with Different Sand Laying Concentrations

Abstract

The present invention discloses a diversion chamber for acid etching of rock slabs and evaluation of different sand laying concentrations, which includes a bottom plate, a top plate and a diversion chamber main body. Support rods are fixedly connected between the four corners at the top of the bottom plate and the four corners at the bottom of the top plate. Sliding plates are slidably connected between the outer sides of the top and bottom of the support rods. Adjusting and pressing assemblies are arranged at the bottom of the bottom plate and the top of the top plate. The structure of the present invention is compact, the operation is simple and convenient, and the practicability is strong. Sealing plates made of rubber are arranged at the top and bottom of the diversion chamber main body, which can preliminarily seal the diversion chamber main body. At the same time, inflatable sealing is carried out in cooperation with the airbag, which can not only increase the overall sealing effect of the rock slab in the diversion chamber, but also ensure that the rock slab is closely attached to the rock slab while the rock slab is broken during the pressure-bearing process, realizing the sealing of the cracks in the rock slab itself, thereby avoiding the cross-flow of the test fluid through the broken rock slab, and further ensuring the accuracy of the evaluation results of acid etching of rock slabs and different sand laying concentrations.

Description

Technical Field

[0001] The invention belongs to the technical field of petroleum engineering, and particularly relates to a rock plate acid etching and different sand laying concentration evaluation diversion chamber. Background Art

[0002] In the existing life, acid fracturing technology is one of the key technologies for the stimulation and reconstruction of carbonate rock oil and gas reservoirs. During acid fracturing construction, the acid fluid unevenly etches the fracture wall surface. After the construction is completed, under the action of the closing pressure, the undissolved area serves as a support point to form an acid-etched fracture with a certain geometric size and conductivity, thereby realizing the production increase of oil and gas wells. The conductivity of the acid-etched fracture is one of the key factors affecting the acid fracturing effect. At the same time, the sand laying concentration is one of the important parameters affecting the conductivity of the acid-etched sand-filled fracture. The API standard diversion chamber is used for both rock plate acid etching and different sand laying concentration evaluations. Among them, the rock plate seal of the API standard diversion chamber is an important parameter affecting the evaluation results of rock plate acid etching and different sand laying concentrations.

[0003] However, the existing API standard diversion chamber has a poor rock plate sealing effect, which affects the evaluation results of rock plate acid etching and different sand laying concentrations. At the same time, the interior of the existing API standard diversion chamber lacks equipment for sealing and protecting the rock plate from breaking. If there are defects in the rock plate itself, it is easy to break during the pressure-bearing process, resulting in the test fluid flowing through the broken rock plate, and then making the test results distorted, which is not conducive to actual use. Summary of the Invention

[0004] The purpose of the present invention is to provide a rock plate acid etching and different sand laying concentration evaluation diversion chamber to solve the problems mentioned in the background art.

[0005] To solve the above problems, the present invention provides a technical solution:

[0006] A rock plate acid etching and different sand laying concentration evaluation diversion chamber includes a bottom plate, a top plate and a diversion chamber main body. Support rods are fixedly connected between the four corners at the top of the bottom plate and the four corners at the bottom of the top plate. Sliding plates are slidably connected between the outer sides of the top and bottom of the support rods. Adjusting and pressing components are arranged at the bottom of the bottom plate and the top of the top plate. The diversion chamber main body is arranged between the two sliding plates. Sealing plates are fixedly connected to the sides of the sliding plates close to the diversion chamber main body. Air bags are arranged on the sides of the sealing plates away from the sliding plates.

[0007] Preferably, a proppant layer is arranged inside the diversion chamber main body. Rock plates are arranged at the upper and lower ends of the diversion chamber main body and inside the proppant layer. First sealing grooves are opened at the top and bottom of the inner wall of the diversion chamber main body. Second sealing grooves are opened on one side of the inner wall of the diversion chamber main body and located at the first sealing grooves.

[0008] Preferably, the adjusting and pressing assembly includes fixing nuts. Fixing nuts are fixedly connected to the bottom of the bottom plate and the top of the top plate. Adjusting screws are threadedly connected to the interiors of the fixing nuts. One ends of the adjusting screws close to the sliding plate penetrate through the corresponding bottom plate or top plate and are rotatably connected to the sliding plate.

[0009] Preferably, the sealing plates are all made of rubber material.

[0010] Preferably, air inlet pipes are fixedly connected to the sides of the air bags close to the sealing plates. One ends of the air inlet pipes away from the air bags penetrate through the corresponding sealing plates and the sliding plate.

[0011] Preferably, the sizes of the first sealing grooves match the sizes of the corresponding sealing plates.

[0012] Preferably, the second sealing grooves cooperate with the corresponding air bags.

[0013] Preferably, pressure measurement ports are formed on both sides of the main body of the diversion chamber and on one side of the second sealing groove, and liquid inlet and outlet holes are formed on both sides of the main body of the diversion chamber and on one side of the pressure measurement ports.

[0014] Preferably, adjusting knobs are fixedly connected to the ends of the adjusting screws away from the sliding plate.

[0015] The beneficial effects of the present invention are as follows: The structure of the present invention is compact, the operation is simple and convenient, and the practicability is strong. Rubber sealing plates are arranged at the top and bottom of the main body of the diversion chamber, which can initially seal the main body of the diversion chamber. At the same time, inflatable sealing is carried out in cooperation with the air bags, which can not only increase the overall sealing effect of the rock plate in the diversion chamber, but also ensure that the rock plate is closely attached to the rock plate while the rock plate is broken during the pressure-bearing process, realizing the sealing of the cracks in the rock plate itself, thereby avoiding the cross-flow of the test fluid through the broken rock plate, and further ensuring the accuracy of the acid etching of the rock plate and the evaluation results of different sand-laying concentrations. Description of the Drawings

[0016] For ease of explanation, the present invention is described in detail by the following specific embodiments and the accompanying drawings.

[0017] Figure 1 is a schematic diagram of the overall structure split of the present invention;

[0018] Figure 2 is the front view of the present invention;

[0019] Figure 3 is a schematic diagram of the structure of the main body of the diversion chamber of the present invention;

[0020] Figure 4 is Figure 2 the enlarged view of part A in

[0021] In the figure: 1, bottom plate; 2, top plate; 3, main body of the diversion chamber; 31, proppant layer; 32, rock plate; 33, first sealing groove; 34, second sealing groove; 35, pressure measuring port; 36, liquid inlet and outlet hole; 4, support rod; 5, sliding plate; 6, adjusting and pressing assembly; 61, fixing nut; 62, adjusting screw; 63, adjusting knob; 7, sealing plate; 8, airbag; 9, air charging pipe. Specific implementation manner

[0022] As Figures 1-4 shown, the following technical solutions are adopted in this specific implementation manner:

[0023] Example:

[0024] A diversion chamber for acid etching of rock plates and evaluation of different proppant concentrations includes a bottom plate 1, a top plate 2 and a main body 3 of the diversion chamber. Support rods 4 are fixedly connected between the four corners at the top of the bottom plate 1 and the four corners at the bottom of the top plate 2. The support rods 4 facilitate better support and connection between the top plate 2 and the bottom plate 1; Sliding plates 5 are slidably connected between the outer sides of the top and bottom of the support rods 4. The support rods 4 facilitate better limiting of the movement of the sliding plates 5; Adjusting and pressing assemblies 6 are arranged at the bottom of the bottom plate 1 and the top of the top plate 2. The main body 3 of the diversion chamber is arranged between the two sliding plates 5. The sliding plates 5 facilitate better pressing and sealing of the top and bottom of the main body 3 of the diversion chamber; Sealing plates 7 are fixedly connected to one side of the sliding plates 5 close to the main body 3 of the diversion chamber, and airbags 8 are arranged on the sides of the sealing plates 7 away from the sliding plates 5.

[0025] Among them, a proppant layer 31 is arranged inside the main body 3 of the diversion chamber, rock plates 32 are arranged at both the upper and lower ends of the main body 3 of the diversion chamber and inside the proppant layer 31. First sealing grooves 33 are opened at the top and bottom of the inner wall of the main body 3 of the diversion chamber, and second sealing grooves 34 are opened on one side of the inner wall of the main body 3 of the diversion chamber and located on one side of the first sealing grooves 33. An inner cavity is arranged inside the main body 3 of the diversion chamber for installing the proppant layer 31 and the rock plates 32. The main body 3 of the diversion chamber facilitates better actual operation.

[0026] Among them, the adjusting and pressing assembly 6 includes fixing nuts 61. Fixing nuts 61 are fixedly connected to the bottom of the bottom plate 1 and the top of the top plate 2. Adjusting screws 62 are threadedly connected inside the fixing nuts 61. One end of each adjusting screw 62 close to the sliding plate 5 penetrates through the corresponding bottom plate 1 or top plate 2 and is rotatably connected to the sliding plate 5. When it is necessary to preliminarily seal the main body 3 of the diversion chamber, the adjusting screws 62 can be rotated to change the relative positions between the adjusting screws 62 and the fixing nuts 61, so as to achieve the purpose of adjusting the positions of the sliding plates 5, enabling the two sliding plates 5 to respectively perform preliminary sealing operations on the top and bottom of the main body 3 of the diversion chamber.

[0027] Among them, the sealing plates 7 are all made of rubber material, which makes the use effect of the sealing plates 7 better, thus facilitating better increasing the sealing effect of the preliminary seal.

[0028] Among them, one side of the airbag 8 close to the sealing plate 7 is fixedly connected with an air charging pipe 9, and one end of the air charging pipe 9 far away from the airbag 8 penetrates through the corresponding sealing plate 7 and the sliding plate 5. Through the air charging pipe 9, it is convenient to better inflate the airbag 8, so as to better use the airbag 8. At the same time, the operation is convenient and fast. After the evaluation operation is completed, the equipment can be quickly deflated and disassembled.

[0029] Among them, the size of the first sealing groove 33 is matched with the size of the corresponding sealing plate 7. Through the cooperation between the first sealing groove 33 and the sealing plate 7, it is convenient to better increase the sealing effect between the sealing plate 7 and the diversion chamber main body 3.

[0030] Among them, the second sealing groove 34 is matched with the corresponding airbag 8. Through the cooperation between the second sealing groove 34 and the airbag 8, when the airbag 8 is filled with gas, the airbag 8 fills the inside of the second sealing groove 34, thereby further sealing the diversion chamber main body 3. At the same time, the airbag 8 after being filled with gas is closely attached to the rock plate 32, so as to ensure that when the rock plate 32 is broken during the pressure-bearing process, it is closely attached to the rock plate 32, realizing the sealing of the cracks in the rock plate 32 itself, thereby avoiding the test fluid from flowing through the broken rock plate 32, and further ensuring the accuracy of the acid etching of the rock plate 32 and the evaluation results of different sand laying concentrations.

[0031] Among them, pressure measuring ports 35 are opened on both sides of the diversion chamber main body 3 and on one side of the second sealing groove 34, and liquid inlet and outlet holes 36 are opened on both sides of the diversion chamber main body 3 and on one side of the pressure measuring ports 35. By providing the pressure measuring ports 35 and the liquid inlet and outlet holes 36, it is convenient to better carry out the pressure measuring operation and at the same time convenient to better carry out the liquid inlet and outlet operation.

[0032] Among them, one end of the adjusting screw 62 far away from the sliding plate 5 is fixedly connected with an adjusting knob 63. Through the adjusting knob 63, it is convenient to better rotate and adjust the adjusting screw 62.

[0033] The usage state of the present invention is as follows: Place the device at the designated bracket position. First, install the proppant layer 31 and the rock plate 32 inside the diversion chamber body 3. Then, rotate and adjust the adjusting screw 62 by turning the adjusting knob 63, so as to change the relative position between the adjusting screw 62 and the fixing nut 61, and further achieve the purpose of adjusting the position of the sliding plate 5, making the two sliding plates 5 perform preliminary sealing operations with the top and bottom of the diversion chamber body 3 respectively. After the two sliding plates 5 are tightly attached to the top and bottom of the diversion chamber body 3 respectively, the sealing plate 7 will enter the corresponding first sealing groove 33, and at the same time, the airbag 8 also enters the diversion chamber body 3. Then, the airbag 8 can be inflated through the air filling pipe 9, so as to better use the airbag 8. At the same time, the operation is convenient and fast. After the evaluation operation is completed, the device can be quickly deflated and disassembled. The inflated airbag 8 fills the inside of the second sealing groove 34, so as to further seal the diversion chamber body 3. At the same time, the inflated airbag 8 is tightly attached to the rock plate 32, so as to ensure that when the rock plate 32 breaks during the pressure-bearing process, it is closely attached to the rock plate 32, realizing the sealing of the cracks in the rock plate 32 itself, thus avoiding the test fluid from flowing through the broken rock plate 32, and further ensuring the accuracy of the acid etching of the rock plate 32 and the evaluation results of different sand-laying concentrations.

[0034] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "center", "both ends", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0035] In addition, the terms "first", "second", "third", "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third", "fourth" may explicitly or implicitly include at least one of such features.

[0036] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "set", "connected", "fixed", "swivel-connected", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An acid etching of rock slab and a diversion chamber for evaluating different sand laying concentrations, characterized in that, It includes a bottom plate (1), a top plate (2) and a diversion chamber main body (3). There are support rods (4) fixedly connected between the four corners at the top of the bottom plate (1) and the four corners at the bottom of the top plate (2). There are sliding plates (5) slidably connected between the outer sides of the top and bottom of the support rods (4). Adjusting and pressing components (6) are arranged at the bottom of the bottom plate (1) and the top of the top plate (2). The diversion chamber main body (3) is arranged between the two sliding plates (5). Sealing plates (7) are fixedly connected to the sides of the sliding plates (5) close to the diversion chamber main body (3). Air bags (8) are arranged on the sides of the sealing plates (7) away from the sliding plates (5). A proppant layer (31) is arranged inside the diversion chamber main body (3). Slate plates (32) are arranged at the upper and lower ends of the proppant layer (31) inside the diversion chamber main body (3). First sealing grooves (33) are opened at the top and bottom of the inner wall of the diversion chamber main body (3). Second sealing grooves (34) are opened on the inner wall of the diversion chamber main body (3) and on one side of the first sealing grooves (33). The second sealing grooves (34) cooperate with the corresponding air bags (8). After the air bags (8) are filled with air, they closely fit with the slate plates (32), so as to ensure that while the slate plates (32) are broken during pressure bearing, they closely adhere to the slate plates (32), realizing the sealing of the cracks in the slate plates (32) themselves, thereby preventing the test fluid from flowing through the broken slate plates (32).

2. The flow guiding chamber for acid etching of rock slabs and evaluation of different sand laying concentrations according to claim 1, characterized in that The adjusting and pressing component (6) includes fixing nuts (61). Fixing nuts (61) are fixedly connected to the bottom of the bottom plate (1) and the top of the top plate (2). Adjusting screws (62) are threadedly connected inside the fixing nuts (61). One ends of the adjusting screws (62) close to the sliding plates (5) penetrate through the corresponding bottom plate (1) or top plate (2) and are rotatably connected to the sliding plates (5).

3. A diversion chamber for acid etching of rock slabs and evaluation of different sand laying concentrations according to claim 1, characterized in that, The sealing plates (7) are all made of rubber material.

4. A diversion chamber for acid etching of rock slabs and evaluation of different sand laying concentrations according to claim 1, characterized in that, Inflatable tubes (9) are fixedly connected to the sides of the air bags (8) close to the sealing plates (7). One ends of the inflatable tubes (9) away from the air bags (8) penetrate through the corresponding sealing plates (7) and sliding plates (5).

5. A diversion chamber for acid etching of rock slabs and evaluation of different sand laying concentrations according to claim 2, characterized in that, The sizes of the first sealing grooves (33) are matched with the sizes of the corresponding sealing plates (7).

6. A diversion chamber for acid etching of rock slabs and evaluation of different sand laying concentrations according to claim 2, characterized in that Pressure measuring ports (35) are opened on both sides of the diversion chamber main body (3) and on one side of the second sealing grooves (34). Liquid inlet and outlet holes (36) are opened on both sides of the diversion chamber main body (3) and on one side of the pressure measuring ports (35).

7. A diversion chamber for acid etching of rock slabs and evaluation of different sand laying concentrations according to claim 2, characterized in that Adjusting knobs (63) are fixedly connected to the ends of the adjusting screws (62) away from the sliding plates (5).

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