CN113945359B - Dynamic seam width adjusting flat plate crack applicable to proppant conveying experiment - Google Patents
Dynamic seam width adjusting flat plate crack applicable to proppant conveying experiment Download PDFInfo
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- CN113945359B CN113945359B CN202111236475.7A CN202111236475A CN113945359B CN 113945359 B CN113945359 B CN 113945359B CN 202111236475 A CN202111236475 A CN 202111236475A CN 113945359 B CN113945359 B CN 113945359B
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- 238000002474 experimental method Methods 0.000 title claims abstract description 20
- 230000006835 compression Effects 0.000 claims abstract description 27
- 238000007906 compression Methods 0.000 claims abstract description 27
- 238000007789 sealing Methods 0.000 claims abstract description 27
- 239000004519 grease Substances 0.000 claims description 19
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- WSNMPAVSZJSIMT-UHFFFAOYSA-N COc1c(C)c2COC(=O)c2c(O)c1CC(O)C1(C)CCC(=O)O1 Chemical compound COc1c(C)c2COC(=O)c2c(O)c1CC(O)C1(C)CCC(=O)O1 WSNMPAVSZJSIMT-UHFFFAOYSA-N 0.000 claims description 3
- 230000001050 lubricating effect Effects 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000012800 visualization Methods 0.000 claims description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims 1
- 229920005372 Plexiglas® Polymers 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004925 denaturation Methods 0.000 description 1
- 230000036425 denaturation Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
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Abstract
The invention discloses a dynamic seam width adjusting flat plate crack for a proppant conveying experiment, which comprises a left crack plate, a right crack plate, a left fixing frame, a right fixing frame, an upper compression spring, a lower compression spring, an upper bolt, a lower bolt, an upper nut and a lower nut; the left crack plate is wrapped by the left fixing frame, the right crack plate is wrapped by the right fixing frame, and upper and lower bolts respectively penetrate through the left fixing frame, the upper and lower compression springs and the right fixing frame, and the two ends of the left crack plate are fixed by upper and lower nuts; the upper portion of left fixed frame with the upper portion of right fixed frame is equipped with sealing strip one and upper portion seam width adjustment zone, left side fixed frame with the lower part of right fixed frame is equipped with sealing strip two and lower part seam width adjustment zone, upper portion seam width adjustment zone with lower part seam width adjustment zone is realized through the concave-convex structure on the left and right fixed frame. According to the invention, the change of the crack width of the flat plate can be realized by screwing or unscrewing the screw cap, and the proppant conveying experiment under different crack width conditions is simulated.
Description
Technical Field
The invention relates to the technical field of oil and gas field development, in particular to a dynamic seam width adjusting flat plate crack for a proppant conveying experiment.
Background
With the development of national economy, the demand of oil and gas resources is increased, the development of oil and gas resources is increased, and the oil and gas yield is improved. The hydraulic fracturing technology is an effective way for improving the productivity and efficiency, and is characterized in that a fracturing pump truck is used for injecting fracturing hydraulic fracturing stratum into the stratum, then a certain amount of propping agent particles with high strength are injected, after construction is finished, the cracks are closed, the propping agent supports the cracks, the permeability and seepage area of a reservoir are increased, and a high-speed channel for oil gas flow is formed. The laying form of the propping agent in the seam determines the quality of the fracturing effect, so that the conveying process of the propping agent in the seam is simulated, and the laying form is very necessary to be studied.
At present, the actual crack morphology is often simplified into two parallel smooth plates for the proppant conveying indoor test, and most of proppant conveying experiment flat-plate devices can only realize proppant conveying tests under the condition of single seam width, so that experiments under the condition of different seam widths cannot be carried out. However, the fracture width is variable during fracturing, the fracture width varies from reservoir to reservoir, and variations in the fracture width have a significant impact on proppant transport, thus considering the fracture width. Although the prior art provides some devices with variable seam widths, the devices have the defects that the fluid pressure is not well controlled, accurate seam width adjustment is difficult to realize, the devices are too complex, the manufacturing cost is high, the tightness after seam width adjustment is poor, and the like.
Disclosure of Invention
In view of the foregoing, the present invention is directed to providing a dynamic slot width adjusting flat fracture that can be used in proppant delivery experiments.
The technical scheme of the invention is as follows:
a dynamic seam width adjusting flat plate crack for a proppant conveying experiment comprises a left crack plate, a right crack plate, a left fixing frame, a right fixing frame, an upper compression spring, a lower compression spring, an upper bolt, a lower bolt, an upper nut and a lower nut;
The left fracture plate and the right fracture plate are both T-shaped, the left fixing frame is provided with a T-shaped opening I matched with the left fracture plate, the left fracture plate is arranged in the T-shaped opening I, the right fixing frame is provided with a T-shaped opening II matched with the right fracture plate, the right fracture plate is arranged in the T-shaped opening II, the upper bolt penetrates through the left fixing frame, the upper compression spring and the right fixing frame and the two ends of the upper bolt are fixed by the upper nuts, and the lower bolt penetrates through the left fixing frame, the lower compression spring and the right fixing frame and the two ends of the lower bolt are fixed by the lower nuts;
the upper part of the right end face of the left fixed frame is provided with a first groove and a first concave-convex structure, the lower part of the right end face of the left fixed frame is provided with a second groove and a second concave-convex structure, the upper part of the left end face of the right fixed frame is provided with a third groove and a third concave-convex structure, and the lower part of the left end face of the right fixed frame is provided with a fourth groove and a fourth concave-convex structure; the groove III and the groove I are oppositely arranged, a sealing strip I is arranged between the groove III and the groove I, and a sealing strip II is arranged between the groove IV and the groove II; the protruding length of the concave-convex structure on the same side is the same, the protruding end face exceeds the protruding end face of the crack plate on the same side, the concave depth of the concave-convex structure on the same side is the same, the concave-convex structure I and the concave-convex structure III are arranged in a staggered mode to form an upper seam width adjusting area, and the concave-convex structure II and the concave-convex structure IV are arranged in a staggered mode to form a lower seam width adjusting area.
Preferably, the left slit plate and the right slit plate are both made of transparent organic glass.
Preferably, the left fixing frame and the right fixing frame are made of metal.
Preferably, grease for sealing is provided between the first concave-convex structure and the third concave-convex structure, and between the second concave-convex structure and the fourth concave-convex structure.
Preferably, the device further comprises a grease injection hole penetrating through the left fixing frame and the left slit plate and communicating with the upper slit width adjusting region or the lower slit width adjusting region, for injecting grease into the upper slit width adjusting region or the lower slit width adjusting region.
Preferably, the left fixing frame and/or the right fixing frame is provided with a visual window for observing the proppant delivery state.
Preferably, the same surface of the left fixed frame and the right fixed frame is provided with a connecting hole, and the connecting hole can be used for connecting the other group of left fixed frame and the right fixed frame, and the length of the dynamic seam width adjusting flat crack is expanded.
Preferably, the first sealing strip and the second sealing strip are made of rubber.
Preferably, a space of 0.3-0.5mm is arranged between the protrusions of the concave-convex structure of the left fixing frame and the protrusions of the concave-convex structure of the right fixing frame.
Preferably, a displacement sensor is arranged on the left fixed frame and/or the right fixed frame.
The beneficial effects of the invention are as follows:
according to the invention, the slit width of the flat plate slit can be adjusted by screwing or unscrewing the screw cap, and the proppant conveying process under different slit width conditions can be simulated; through the concave-convex structure of design, on the one hand can form the sealing region, on the other hand can realize seam width adjustment to can accurate location, guarantee to control the crack board and be in on the same level.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic perspective view of an embodiment of a dynamic slit width adjusting plate slit according to the present invention;
FIG. 2 is a schematic side view of one embodiment of a dynamic slit width adjusting plate slit of the present invention;
FIG. 3 is a schematic top view of an embodiment of a dynamic slit width adjusting plate slit of the present invention.
Reference numerals in the drawings: 1-left crack plate, 2-right crack plate, 3-left fixed frame, 4-right fixed frame, 5-upper compression spring, 6-lower compression spring, 7-upper bolt, 8-lower bolt, 9-upper nut, 10-lower nut, 11-groove one, 12-concave-convex structure one, 13-groove two, 14-concave-convex structure two, 15-groove three, 16-concave-convex structure three, 17-groove four, 18-concave-convex structure four, 19-sealing strip one, 20-sealing strip two, 21-visual window, 22-lubricating grease filling hole, 23-connecting hole and 24-displacement sensor.
Detailed Description
The application will be further described with reference to the drawings and examples. It should be noted that, without conflict, the embodiments of the present application and the technical features of the embodiments may be combined with each other. It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated. The use of the terms "comprising" or "includes" and the like in this disclosure is intended to cover a member or article listed after that term and equivalents thereof without precluding other members or articles.
In the present invention, the terms "first," "second," and the like, when used in the context of a description, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terminology so used; the terms "upper", "lower", "left", "right" and the like are used generally with respect to the orientation shown in the drawings or with respect to the component itself in a vertical, vertical or gravitational orientation; also, for ease of understanding and description, "inner", "outer", and the like refer to inner and outer relative to the contours of the components themselves. The above directional terms are not intended to limit the present invention.
As shown in fig. 1-3, the present invention provides a dynamic slit width adjusting plate slit for proppant transport experiments, comprising a left slit plate 1, a right slit plate 2, a left fixing frame 3, a right fixing frame 4, an upper compression spring 5, a lower compression spring 6, an upper bolt 7, a lower bolt 8, an upper nut 9 and a lower nut 10;
The left fracture plate 1 and the right fracture plate 2 are both T-shaped, the left fixing frame 3 is provided with a T-shaped opening I matched with the left fracture plate 1, the left fracture plate 1 is arranged in the T-shaped opening I, the right fixing frame 4 is provided with a T-shaped opening II matched with the right fracture plate 2, the right fracture plate 2 is arranged in the T-shaped opening II, the upper bolt 7 penetrates through the left fixing frame 3, the upper compression spring 5 and the right fixing frame 4, two ends of the upper bolt are fixed by the upper nuts 9, and the lower bolt 8 penetrates through the left fixing frame 3, the lower compression spring 6 and the right fixing frame 4, and two ends of the lower bolt are fixed by the lower nuts 10;
The upper part of the right end face of the left fixed frame 3 is provided with a first groove 11 and a first concave-convex structure 12, the lower part of the right end face of the left fixed frame 3 is provided with a second groove 13 and a second concave-convex structure 14, the upper part of the left end face of the right fixed frame 4 is provided with a third groove 15 and a third concave-convex structure 16, and the lower part of the left end face of the right fixed frame 4 is provided with a fourth groove 17 and a fourth concave-convex structure 18; the third groove 15 is opposite to the first groove 11, a first sealing strip 19 is arranged between the third groove and the first groove, the fourth groove 17 is opposite to the second groove 13, and a second sealing strip 20 is arranged between the fourth groove and the second groove; the protruding length of the concave-convex structure on the same side is the same, the protruding end face exceeds the protruding end face of the crack plate on the same side, the concave depth of the concave-convex structure on the same side is the same, the concave-convex structure I12 and the concave-convex structure III 16 are arranged in a staggered mode to form an upper seam width adjusting area, and the concave-convex structure II 14 and the concave-convex structure IV 18 are arranged in a staggered mode to form a lower seam width adjusting area.
In this embodiment, the non-crack surface of the crack plate is surrounded by the fixing frame, and optionally, a gap between the two is sealed by glue, so as to improve sealing performance. The upper compression spring and the lower compression spring have stronger stiffness coefficients, and can generate stronger elasticity after smiling denaturation, and the left fixing frame and the right fixing frame can be pushed to move outwards after external force is removed, so that the seam width is adjusted. The first sealing strip and the second sealing strip can effectively prevent fluid in the crack from flowing out.
In a specific embodiment, one ends of the upper compression spring 5 and the lower compression spring 6 may be fixed to the left fixing frame 3 or the right fixing frame 4, so that the compression springs can be prevented from being lost and the assembling process can be simplified.
In a specific embodiment, the left slit plate 1 and the right slit plate 2 are made of transparent organic glass, and the left fixing frame 3 and/or the right fixing frame 4 are provided with a visualization window 21. Therefore, the method can be convenient for observing the conveying state of the propping agent in the flat crack in real time and knowing the laying form in the conveying process of the propping agent.
In a specific embodiment, the left fixing frame 3 and the right fixing frame 4 are made of metal, and the first sealing strip 19 and the second sealing strip 20 are made of rubber.
In a specific embodiment, grease for further sealing is provided between the first concave-convex structure 12 and the third concave-convex structure 16, and between the second concave-convex structure 14 and the fourth concave-convex structure 18, the grease is injected through a grease injection hole 22, and the grease injection hole 22 penetrates through the left fixing frame 3 and the left slit plate 1 and is communicated with the upper slit width adjusting area or the lower slit width adjusting area. In this embodiment, when it is necessary to inject grease through the grease injection hole 22, the grease may be injected into the upper seam width adjustment area or the lower seam width adjustment area by a syringe or other injection tool, and after the injection is completed, the grease may be sealed by a screw or the like.
In a specific embodiment, the same surface of the left fixing frame 3 and the right fixing frame 4 is provided with a connecting hole 23, and the connecting hole 23 can be used for connecting another group of left fixing frame and right fixing frame, and expanding the length of the dynamic seam width adjusting flat crack.
In a specific embodiment, a space of 0.3-0.5mm is arranged between the convex of the concave-convex structure of the left fixed frame 3 and the convex of the concave-convex structure of the right fixed frame 4. Thus, a smaller flow channel is formed between the left fixed frame 3 and the right fixed frame 4, the flowing resistance is increased to achieve the sealing effect, and the sealing performance is further improved by combining the lubricating grease embodiment.
In a specific embodiment, the left fixed frame 3 and/or the right fixed frame 4 are provided with a displacement sensor 24. In this way, the distance of movement of the left and/or right slit plates 1, 2 can be obtained, so that the variation in slit width is known. When the crack plate is specifically applied, the compression spring is compressed or restored by screwing or unscrewing the nut and changing the acting force on the compression spring, and the current crack width is determined by accurately positioning the displacement change of the crack plate through the displacement sensor. By the mode, the experiment of conveying propping agents in the cracks under different slit widths can be realized, and the slit width can be adjusted in real time according to requirements.
In one specific embodiment, the dynamic slot width adjusting flat fracture useful in proppant delivery experiments described herein is used:
(1) The left fracture plate 1 and the right fracture plate 2 are respectively arranged in the left fixing frame 3 and the right fixing frame 4, so that the fracture plates are tightly attached to the inner sides of the fixing frames;
(2) The concave-convex structures of the left fixing frame 3 and the right fixing frame 4 are aligned and spliced, and the left fixing frame 3 and the right fixing frame 4 are fixed through holes on the left fixing frame 3 and the right fixing frame 4 by utilizing a plurality of bolts, compression springs and nuts;
(3) Injecting grease into the upper and lower seam width adjustment regions through the grease injection hole 22 so that the grease fills the upper and lower seam width adjustment regions;
(4) A displacement sensor 24 is arranged on the right fixed frame 4, the assembly of the dynamic slit width adjusting flat plate slit is completed, and the initial slit width of the dynamic slit width adjusting flat plate slit is determined;
(5) The nuts on the right fixing frame are screwed or unscrewed, the compression springs are compressed or restored to deform after being stressed, so that the right fixing frame moves inwards or outwards in the range of the upper seam width adjusting area and the lower seam width adjusting area and carries the left slit plate 1 or the right slit plate 2 to move, and the width between the left slit plate and the right slit plate is adjusted, so that seam width adjustment is realized; reading the numerical value on the displacement sensor 24 to obtain the moving distance of the crack plate, namely determining the change amount of the crack width and determining the current crack width;
(6) And (3) repeating the step (4) and the step (5) according to the requirements, so that different flat crack widths can be obtained, and the proppant conveying test under different crack widths is realized.
The invention can solve the technical problems of complex structure, high cost or the need of disassembling and replacing the whole slit plate to realize slit width adjustment, difficult operation, large experimental workload and the like of the traditional slit width adjusting device, and can realize slit width adjustment only by changing the deformation of the stressed state of the compression spring through adjusting the tightening degree of the screw cap. And manual real-time seam width adjustment in the experimental proppant conveying process can be realized according to requirements, and the device is simple to operate and low in cost. In addition, the concave-convex structure is introduced to form the sealing area, so that the resistance of fluid outflow can be effectively increased, the fluid is prevented from overflowing, the sealing performance is better, the adjustment area formed by the structure can realize simultaneous (rectangular seam) or different (wedge seam) seam width adjustment of the upper seam width adjustment area and the lower seam width adjustment area, the operation is simple and convenient, the structure is simple, and the cost and time for conveying propping agents under the seam width changing condition by researchers are greatly reduced.
The present invention is not limited to the above-mentioned embodiments, but is intended to be limited to the following embodiments, and any modifications, equivalents and modifications can be made to the above-mentioned embodiments without departing from the scope of the invention.
Claims (8)
1. The dynamic seam width adjusting flat plate crack for the proppant conveying experiment is characterized by comprising a left crack plate, a right crack plate, a left fixing frame, a right fixing frame, an upper compression spring, a lower compression spring, an upper bolt, a lower bolt, an upper nut and a lower nut;
The left fracture plate and the right fracture plate are both T-shaped, the left fixing frame is provided with a T-shaped opening I matched with the left fracture plate, the left fracture plate is arranged in the T-shaped opening I, the right fixing frame is provided with a T-shaped opening II matched with the right fracture plate, the right fracture plate is arranged in the T-shaped opening II, the upper bolt penetrates through the left fixing frame, the upper compression spring and the right fixing frame and the two ends of the upper bolt are fixed by the upper nuts, and the lower bolt penetrates through the left fixing frame, the lower compression spring and the right fixing frame and the two ends of the lower bolt are fixed by the lower nuts;
The upper part of the right end face of the left fixed frame is provided with a first groove and a first concave-convex structure, the lower part of the right end face of the left fixed frame is provided with a second groove and a second concave-convex structure, the upper part of the left end face of the right fixed frame is provided with a third groove and a third concave-convex structure, and the lower part of the left end face of the right fixed frame is provided with a fourth groove and a fourth concave-convex structure; the groove III and the groove I are oppositely arranged, a sealing strip I is arranged between the groove III and the groove I, and a sealing strip II is arranged between the groove IV and the groove II; the protruding length of the concave-convex structure on the same side is the same, the protruding end face exceeds the protruding end face of the crack plate on the same side, the concave depth of the concave-convex structure on the same side is the same, the concave-convex structure I and the concave-convex structure III are arranged in a staggered mode to form an upper seam width adjusting area, and the concave-convex structure II and the concave-convex structure IV are arranged in a staggered mode to form a lower seam width adjusting area;
Grease for sealing is arranged between the first concave-convex structure and the third concave-convex structure and between the second concave-convex structure and the fourth concave-convex structure;
The lubricating grease injection hole penetrates through the left fixing frame and the left crack plate and is communicated with the upper seam width adjusting area or the lower seam width adjusting area, and lubricating grease is injected into the upper seam width adjusting area or the lower seam width adjusting area.
2. The dynamic slot width adjusting flat panel fracture useful in proppant delivery experiments of claim 1, wherein the left fracture plate and the right fracture plate are each made of transparent plexiglass.
3. The dynamic slot width adjustment panel fracture for proppant delivery experiments of claim 1, wherein the left and right fixation frames are each made of metal.
4. The dynamic slit width adjusting flat plate fracture usable for proppant transport experiments according to claim 1, wherein the left and/or right fixed frame is provided with a visualization window for observing proppant transport status.
5. The dynamic slit width adjusting flat plate crack for proppant delivery experiments according to claim 1, wherein the same face of the left fixed frame and the right fixed frame is provided with a connecting hole, the connecting hole can be used for connecting another group of left fixed frame and right fixed frame, and the length of the dynamic slit width adjusting flat plate crack is expanded.
6. The dynamic slit width adjusting flat plate crack for proppant transport experiments according to claim 1, wherein the first sealing strip and the second sealing strip are made of rubber.
7. The dynamic slit width adjusting flat plate crack for proppant transportation experiments according to claim 1, wherein a distance of 0.3-0.5mm is arranged between the protrusions of the concave-convex structure of the left fixed frame and the protrusions of the concave-convex structure of the right fixed frame.
8. The dynamic slit width adjustment flat sheet slit for proppant transport experiments as set forth in any one of claims 1 to 7 wherein displacement sensors are provided on said left and/or right fixed frames.
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| CN202111236475.7A CN113945359B (en) | 2021-10-23 | 2021-10-23 | Dynamic seam width adjusting flat plate crack applicable to proppant conveying experiment |
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| CN113945359B (en) * | 2021-10-23 | 2024-05-10 | 西南石油大学 | Dynamic seam width adjusting flat plate crack applicable to proppant conveying experiment |
| CN115619741A (en) * | 2022-10-19 | 2023-01-17 | 中国石油大学(北京) | Crack width determination method and device, computer equipment and storage medium |
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