Inorganic proppant shear strength detection device

Abstract

The utility model aims to provide an inorganic proppant shear strength detection device, and belongs to the technical field of detection. The strength detection device comprises a supporting base, a rectangular-plate-shaped test base plate, a left supporting sliding block assembly, a right supporting sliding block assembly, a shearing assembly and an amplification observation assembly. The right supporting sliding block assembly and the left supporting sliding block assembly are oppositely arranged and located on the same side of the testing base plate. The shearing assembly is provided with a pressure sensor and a shearing rod which move synchronously; the shearing rod is located above the left supporting sliding block assembly and the right supporting sliding block assembly and is perpendicular to the supporting base. And the lower end of the shearing rod is gradually shrunk to form a flat-blade-shaped shearing blade. According to the invention, the shear strength of the quartz sand proppant particles with the particle size of 6-140 meshes can be tested, and the comprehensive performance evaluation data of the quartz sand proppant can be perfected.

Description

Technical Field

[0001] This invention relates to the field of testing technology, and in particular to a device for testing the shear strength of inorganic proppant. Background Technology

[0002] Hydraulic fracturing refers to the technique of using high closure pressure to fracture low-permeability oil and gas wells, creating highly conductive channels for oil and gas. Proppant is a key material in fracturing operations. Quartz sand proppant has advantages such as lower density, wider distribution, and lower price compared to ceramic proppant, making it the best proppant choice for shallow well production. It holds the largest market share among proppant types and is also a hot research topic.

[0003] For example, Chinese invention patent application CN112342011A discloses a pressure-resistant quartz sand proppant for fracturing and its production method. First, at a temperature of 10℃ to 50℃, the required amount of washed quartz sand, sodium silicate, epoxy resin, and sodium hydroxide are added under stirring, and the reaction time is 0.3 min to 2 min. Next, hexamethylenetetramine and ammonium chloride are added under stirring, and the reaction time is 0.3 min to 2 min. Then, calcium stearate is added, and the reaction time is 0.3 min to 1 min. Then, under continued stirring, the temperature is 95℃ to 120℃, and the reaction time is 30 min to 60 min to obtain the quartz sand proppant for fracturing.

[0004] In practical applications, quartz sand proppant not only needs to withstand the pressure at the bottom layer of fractures, but it also experiences shear stress during its mixing with fracturing fluid and injection into the fracture layer. However, existing technologies typically do not provide shear strength data for quartz sand proppant, making it impossible to accurately and comprehensively evaluate its overall performance. Summary of the Invention

[0005] The present invention aims to provide an inorganic proppant shear strength testing device, which can test the shear strength of quartz sand proppant particles with a particle size of 6 mesh to 140 mesh, thereby improving the comprehensive performance evaluation data of quartz sand proppant.

[0006] The technical solution adopted in this invention is:

[0007] An inorganic proppant shear strength testing device, comprising:

[0008] Support base;

[0009] A rectangular test base plate, which is vertically disposed on the upper surface of the support base;

[0010] A left support slider assembly, which is slidably disposed on one side surface of the test base plate;

[0011] A right support slider assembly is slidingly arranged on one side surface of the test base plate; the right support slider assembly and the left support slider assembly are oppositely arranged and located on the same side of the test base plate;

[0012] A shearing assembly has a pressure sensor and a shearing rod which move synchronously; the shearing rod is located above the left support slider assembly and the right support slider assembly and is perpendicular to the support base; the lower end of the shearing rod is tapered to form a flat shearing blade; the thickness of the shearing blade is 0.05-0.1 μm; the pressure sensor is electrically connected with a controller;

[0013] An enlarged observation assembly has a magnifying glass.

[0014] Further, the upper surface of the support base is further provided with a horizontal adjustment assembly.

[0015] Further, a left mounting groove and a right mounting groove in the shape of inverted "T" are respectively formed from the upper part of the side walls on both sides of the length direction of the test base plate along the length direction of the test base plate; the distance between the center of the left mounting groove and the center of the right mounting groove and the upper surface of the support base is the same, and they are not connected; the horizontal part of the left mounting groove and the right mounting groove penetrates to one side surface of the test base plate; a part of the left support slider assembly and the right support slider assembly are respectively slidingly arranged in the left mounting groove and the right mounting groove.

[0016] Further, left and right locking threaded holes are formed on both sides of the top surface of the test base plate in the length direction; the left and right locking threaded holes respectively penetrate to the vertical part of the left mounting groove and the right mounting groove and are respectively matched with left and right locking screws.

[0017] Further, the left support slider assembly comprises:

[0018] A left slider body is located at the left mounting groove and is attached to one side surface of the test base plate; the height of the left slider body is greater than the groove width of the groove opening of the left mounting groove; one end of the left slider body towards the right support slider assembly is in the shape of a triangular prism and has a left upper support inclined surface and a left lower avoiding inclined surface;

[0019] A left T-shaped sliding part is matched with the left mounting groove and is connected with the left slider body; the length of the left T-shaped sliding part is less than the length of the left slider body and the side walls thereof away from the right support slider assembly are flush;

[0020] The right support slider assembly comprises:

[0021] The right slider body is located at the right mounting slot and is attached to one side surface of the test base plate; the height of the right slider body is greater than the slot width at the slot opening of the right mounting slot; the right slider body is in a triangular prism shape at one end of the left support slider assembly and has a right upper support inclined surface and a right lower avoidance inclined surface;

[0022] The right T-shaped sliding part is fitted into the right mounting slot and is connected to the right slider body; the length of the right T-shaped sliding part is less than the length of the right slider body, and both are flush with the side wall away from the left support slider assembly.

[0023] Further, the left support slider assembly further comprises:

[0024] The left ear plate is arranged near the left edge of the one side surface of the test base plate corresponding to the slot opening of the left mounting slot, and a through left mounting threaded hole is formed in the left ear plate;

[0025] One end of the left screw rod is movably connected to the left slider body away from the side wall of the right support slider assembly; the other end of the left screw rod is fitted through the left mounting threaded hole and is provided with a left handle;

[0026] The right support slider assembly further comprises:

[0027] The right ear plate is arranged near the right edge of the one side surface of the test base plate corresponding to the slot opening of the right mounting slot, and a through right mounting threaded hole is formed in the right ear plate;

[0028] One end of the right screw rod is movably connected to the right slider body away from the side wall of the left support slider assembly; the other end of the right screw rod is fitted through the right mounting threaded hole and is provided with a right handle.

[0029] Further, a vertical marker line is arranged at the vertical center position of the one side surface of the test base plate where the left support slider assembly and the right support slider assembly are located; a horizontal marker line is arranged on the one side surface of the test base plate corresponding to the slot length direction of the left mounting slot and the right mounting slot; the horizontal marker line and the vertical marker line are in a cross intersection state;

[0030] During the sliding process of the left slider body and the right slider body, the movement track of the edge at the intersection of the left upper support inclined surface and the left lower avoidance inclined surface, and the movement track of the edge at the intersection of the right upper support inclined surface and the right lower avoidance inclined surface coincide with the side of the horizontal marker line which is parallel to the upper surface of the support base;

[0031] When the shearing rod moves vertically, the movement trajectory of the shearing blade coincides with the surface of the horizontal marking line that is perpendicular to the upper surface of the support base.

[0032] Furthermore, the angle between the upper left support slope and the upper surface of the support base is 20~80°;

[0033] The angle between the upper right support slope and the upper surface of the support base is 20~80°.

[0034] Furthermore, the shearing component also includes:

[0035] An inverted "L"-shaped support plate is vertically disposed on the other side of the test base plate opposite to the left support slider assembly and the right support slider assembly; the top of the support plate is higher than the top of the test base plate.

[0036] A hydraulic cylinder is located above the left and right support slider assemblies and is connected to the end of the horizontal portion of the support plate; the piston rod of the hydraulic cylinder is perpendicular to the support base and is connected to the upper end of the shear rod; the pressure sensor is located between the lower movable free end of the piston rod and the upper end of the shear rod.

[0037] The beneficial effects of this invention are:

[0038] The inorganic proppant shear strength testing device of this invention has a simple structure and is easy to use. It can test the shear strength of quartz sand proppant particles with a particle size of 6-140 mesh, thus improving the comprehensive performance evaluation data of quartz sand proppant. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a front view of the inorganic proppant shear strength testing device in the embodiment.

[0041] Figure 2 This is a three-dimensional structural diagram of the inorganic proppant shear strength testing device in the embodiment. Figure 1 .

[0042] Figure 3 This is a three-dimensional structural diagram of the inorganic proppant shear strength testing device in the embodiment. Figure 2 .

[0043] Figure 4 Three-dimensional structure schematic diagram of the left support slider assembly in the embodiment.

[0044] Figure 5 Three-dimensional structure schematic diagram of the right support slider assembly in the embodiment.

[0045] The reference signs are:

[0046] 100-support base, 200-horizontal adjustment assembly, 300-test base plate, 400-left support slider assembly, 500-right support slider assembly, 600-shear assembly, 700-magnifying observation assembly, 800-narrow band.

[0047] 210-adjustable support foot, 220-bubble level.

[0048] 310-vertical marker line, 320-left mounting slot, 330-right mounting slot, 340-horizontal marker line, 350-left locking threaded hole, 360-right locking threaded hole.

[0049] 410-left ear plate, 411-left mounting threaded hole, 420-left slider body, 421-left upper support inclined surface, 422-left lower avoiding inclined surface, 430-left T-shaped sliding part, 440-left screw rod, 450-left handle.

[0050] 510-right ear plate, 511-right mounting threaded hole, 520-right slider body, 521-right upper support inclined surface, 522-right lower avoiding inclined surface, 530-right T-shaped sliding part, 540-right screw rod, 550-right handle.

[0051] 610-support plate, 620-hydraulic oil cylinder, 621-piston rod, 622-pressure sensor, 630-shear rod, 631-shear blade.

[0052] 710-magnifying glass, 720-omnidirectional adjustment support. DETAILED DESCRIPTION

[0053] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0054] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, these are merely examples and are not intended to limit the present invention.

[0055] The embodiments of the invention will now be described in detail with reference to the accompanying drawings.

[0056] Figure 1 This is a front view of the inorganic proppant shear strength testing device in Example 1. Figure 2 This is a three-dimensional structural diagram of the inorganic proppant shear strength testing device in Example 1. Figure 1 . Figure 3 This is a three-dimensional structural diagram of the inorganic proppant shear strength testing device in the embodiment. Figure 2 .like Figures 1-3 As shown, the inorganic proppant shear strength testing device includes a support base 100. The support base 100 forms the foundation of the entire shear strength testing device and is approximately rectangular in shape. An adjustable support foot 210 is located at each of the four corners of the lower surface of the support base 100. A bubble level 220 is located near the middle of one edge of the long side and another near the middle of one edge of the short side of the upper surface of the support base 100. In this embodiment, the adjustable support feet 210 and the bubble level 220 together constitute a leveling assembly 200. By observing the real-time status of the two bubble levels 220 and then rotating the adjustable support feet 210, the base 100 can be made approximately level, providing a good foundation for the shear strength testing process.

[0057] like Figures 1-3 As shown, the inorganic proppant shear strength testing device also includes a test base plate 300, a left support slider assembly 400, and a right support slider assembly 500. The left support slider assembly 400 and the right support slider assembly 500 are located on the same side of the test base plate 300 and are arranged opposite each other to provide necessary support for testing the shear strength of the quartz sand proppant particles; the structures of the left support slider assembly 400 and the right support slider assembly 500 are substantially the same.

[0058] The test base plate 300 is substantially in the shape of a square plate, vertically arranged on the upper surface of the support base 100, substantially parallel to the long side of the support base 100, and a vertical mark line 310 is arranged at the vertical center position of one side surface of the test base plate 300; a left mounting groove 320 and a right mounting groove 330 in the shape of an inverted "T" are respectively arranged on the upper part of the side walls of the two sides of the test base plate 300 in the length direction; the left mounting groove 320 and the right mounting groove 330 are symmetrically arranged with the vertical mark line 310 of one side surface of the test base plate 300 as the center of symmetry, and the horizontal parts of the left mounting groove 320 and the right mounting groove 330 pass through one side surface of the test base plate 300, and the left mounting groove 320 and the right mounting groove 330 are not connected; the side surface of the test base plate 300 corresponding to the groove length direction of the left mounting groove 320 and the right mounting groove 330 is provided with a transverse mark line 340, and the transverse mark line 340 and the vertical mark line 310 are in a cross intersection state; the left locking screw hole 350 and the right locking screw hole 360 are arranged on the top surface of the test base plate 300 in the length direction, and the left locking screw hole 350 and the right locking screw hole 360 pass through the vertical parts of the left mounting groove 320 and the right mounting groove 330 respectively; a left locking screw and a right locking screw (not shown in the figure) are respectively arranged in the left locking screw hole 350 and the right locking screw hole 360. In this embodiment, part of the support sliding block assembly 400 and the right support sliding block assembly 500 are respectively located in the left mounting groove 320 and the right mounting groove 330, and are locked by the left locking screw and the right locking screw respectively after the positions of the left mounting groove 320 and the right mounting groove 330 are determined.

[0059] Figure 4 The three-dimensional structure schematic diagram of the left support sliding block assembly in Example 1. As shown in FIG. 4, the left support sliding block assembly 400 is arranged in the left mounting groove 320 of the test base plate 300, and the right support sliding block assembly 500 is arranged in the right mounting groove 330 of the test base plate 300. Figure 4As shown in the middle, the left support slider assembly 400 has a left ear plate 410, a left slider body 420, a left T-shaped sliding part 430 and a left screw rod 440. The left ear plate 410 is arranged near the left edge of the side surface of the test base plate 300 corresponding to the slot of the left mounting slot 320, and a through left mounting threaded hole 411 is formed in the left ear plate 410. The left slider body 420 is located at the left mounting slot 320 and is attached to the side surface of the test base plate 300; the height of the left slider body 420 is greater than the slot width of the slot of the left mounting slot 320, and the width of the left slider body 420 is about 2-10 mm; the left slider body 420 is trapezoidal towards one end of the right support slider assembly 500 and has a left upper support inclined surface 421 and a left lower avoiding inclined surface 422; the included angle between the left upper support inclined surface 421 and the upper surface of the support base 100 is 20-80°. The left T-shaped sliding part 430 is arranged in the left mounting slot 320 and is connected to the left slider body 420; the length of the left T-shaped sliding part 430 is less than the length of the left slider body 420, and the side walls of the two away from the right support slider assembly 500 are flush. One end of the left screw rod 440 is movably connected to the side wall of the left slider body 420 away from the right support slider assembly 500; the other end of the left screw rod 440 passes through the left mounting threaded hole 411 and is provided with a left handle 450. In this embodiment, by rotating the left handle 450 and the left screw rod 440, the left slider body 420 and the left T-shaped sliding part 430 can be made to slide synchronously along the length direction of the left mounting slot 320, and the moving track of the edge of the intersection of the left upper support inclined surface 421 and the left lower avoiding inclined surface 422 coincides with the plane of the transverse marker line 340 parallel to the upper surface of the support base 100 during the sliding process.

[0060] Figure 5 The three-dimensional structure schematic diagram of the left support slider assembly in Example 1. As shown in the left side of the figure, Figure 5As shown in the middle, the right support slider assembly 500 has a right lug plate 510, a right slider body 520, a right T-shaped sliding part 530 and a right screw rod 540. The right lug plate 510 is arranged near the right edge of the side surface of the test base plate 300 corresponding to the slot of the right mounting slot 330, and a through right mounting threaded hole 511 is formed in the right lug plate 510. The right slider body 520 is located at the right mounting slot 330 and is attached to the side surface of the test base plate 300; the height of the right slider body 520 is greater than the slot width at the slot of the right mounting slot 330, and the width of the right slider body 520 is about 2-10 mm; the right slider body 520 is trapezoidal at one end towards the left support slider assembly 400 and has a right upper support inclined surface 521 and a right lower avoiding inclined surface 522; the included angle between the right upper support inclined surface 521 and the upper surface of the support base 100 is 20-80°. The right T-shaped sliding part 530 is arranged in the right mounting slot 330 and is connected with the right slider body 520; the length of the right T-shaped sliding part 530 is less than the length of the right slider body 520, and the side walls of the two away from the right support slider assembly 500 are flush. One end of the right screw rod 540 is movably connected with the side wall of the right slider body 520 away from the left support slider assembly 400; the other end of the right screw rod 540 passes through the right mounting threaded hole 511 and is provided with a right handle 550. In this embodiment, by screwing the right handle 550 and the right screw rod 540, the right slider body 520 and the right T-shaped sliding part 530 can be synchronously slid along the length direction of the right mounting slot 330, and the moving track of the edge of the intersection of the right upper support inclined surface 521 and the right lower avoiding inclined surface 522 coincides with the plane of the transverse marker line 340 parallel to the upper surface of the support base 100 during the sliding process. At the same time, in this embodiment, by adjusting the distance between the left slider body 420 and the right slider body 520, the final locking position of the left locking screw and the right locking screw can meet the test support needs of quartz sand proppant particles of different particle sizes, and the corresponding quartz sand proppant particles are limited at the bottom of the V-shaped structure formed by the left upper support inclined surface 421 and the right upper support inclined surface 521.

[0061] As Figures 1-3As shown in the figure, the inorganic proppant shear strength detection device further comprises a shearing assembly 600. The shearing assembly 600 has a support plate 610, a hydraulic oil cylinder 620 and a shearing rod 630. The support plate 610 is in the shape of an inverted "L" as a whole, and is located on the other side of the test base plate 300; the support plate 610 is connected with the test base plate 300 and the support base 100 at the same time, so as to improve the stability of the support base 100; the top of the support plate 610 is higher than the top of the test base plate 300. The hydraulic oil cylinder 620 is located above the left and right support slider assemblies 400 and 500, and is connected with the end of the horizontal part of the support plate 610; the piston rod 621 of the hydraulic oil cylinder 620 is vertically directed to the support base 100. The shearing rod 630 is vertically arranged, and the upper end thereof is connected with the lower movable end of the piston rod 621; a pressure sensor 622 is further arranged between the upper end of the shearing rod 630 and the piston rod 621; the lower end of the shearing rod 630 is gradually tapered to form a flat shearing blade 631, and the thickness of the shearing blade 631 is about 0.05-0.1 μm; when the shearing rod 630 moves with the piston rod 621, the moving track of the shearing blade 631 coincides with the vertical plane of the lateral marker line 340, and the shearing rod, the piston rod 621 and the pressure sensor 622 move synchronously without touching the test base plate 300. In this embodiment, the controller (not shown in the figure) controls the piston rod 621 to move downward, so that when the shearing blade 631 of the shearing rod 630 contacts the quartz sand proppant particles placed between the left and right slider bodies 420 and 520, the pressure sensor 622 records the change of the pressure signal during the test, and after the controller processes, the corresponding pressure value can be used as the shear strength test result of the quartz sand proppant particles.

[0062] As Figures 1-3 As shown in the figure, the inorganic proppant shear strength detection device further comprises an amplification observation assembly 700. The amplification observation assembly 700 is located on one side of the test base plate 300 where the left and right support slider assemblies 400 and 500 are located; the amplification observation assembly 700 has a magnifying glass 710 and a universal adjusting support 720; one end of the universal adjusting support 720 is connected with the magnifying glass 710, and the other end of the universal adjusting support 720 is connected with the magnifying glass 710; the magnification of the magnifying glass 710 can be selected according to requirements, such as 10 times, 50 times, 100 times, etc. In this embodiment, the relative positions of the left and right slider bodies 420 and 520, the shearing blade 631 and the quartz sand proppant particles can be observed through the magnifying glass 710.

[0063] Based on the inorganic proppant shear strength detection device described above, the quartz sand proppant shear strength detection process comprises the following steps:

[0064] Step S1, take the paper with thickness of 0.05-0.1 μm and size of A4, and cut it into narrow strips 800 with width of about 2-10 mm; the number of narrow strips 800 can be selected according to requirements;

[0065] Step S2, along the length direction of narrow strip 800, use the sheet with thickness of 0.05-0.1 μm or the thin needle with diameter of 0.05-0.1 μm to dip epoxy adhesive resin and then scratch on narrow strip 800 to form a straight-line resin adhesive band with thickness of about 0.01-0.08 μm, then sprinkle the quartz sand proppant to be tested on narrow strip 800, and wait for the epoxy resin to completely solidify;

[0066] Step S3, remove the quartz sand proppant on narrow strip 800 which is not adhered by the epoxy adhesive resin, and observe the fixing condition of each quartz sand proppant particle adhered on the straight-line resin adhesive band one by one through magnifying glass 710; select the quartz sand proppant particle with the depth of invasion into the straight-line resin adhesive band less than half of the particle size as the target to be tested one by one; the adjacent targets are spaced apart by 10-50 mm to form a band of quartz sand proppant particles distributed at intervals;

[0067] Step S4, rotate left handle 450 and right handle 550 to move left slider body 420 and right slider body 520, and observe the movement process through magnifying glass 810 so that the distance between the lower edge of left upper support slope 421 and vertical mark line 310 and the distance between the lower edge of right upper support slope 521 and vertical mark line 310 are substantially the same, and the distance between the lower edge of left upper support slope 421 and the lower edge of right upper support slope 521 is less than the particle size of the target to be tested; take a quartz sand proppant particle as the center, fold narrow strip 800 into V shape, and then place narrow strip 800 on left slider body 420 and right slider body 520, and observe and adjust through magnifying glass 810 so that the quartz sand proppant particle is located at the position corresponding to the intersection point of vertical mark line 310 and horizontal mark line 340, and narrow strip 800 is attached to left upper support slope 421 and right upper support slope 521;

[0068] Step S5, control the working of hydraulic cylinder 620 by controller to drive piston rod 621 and shearing rod 630 to move, so that shearing blade 631 stops moving after contacting the top of quartz sand proppant particle, and observe the relative positions of the contact point of shearing blade 631 and quartz sand proppant particle, the contact point of quartz sand proppant particle and left upper support slope 421, and the contact point of quartz sand proppant particle and right upper support slope 521 through magnifying glass 710 to form a three-point shearing structure; if necessary, adjust the position of quartz sand proppant particle;

[0069] Step S6, the detection value of the pressure sensor 622 is zeroed, and then the hydraulic cylinder 620 is controlled by the controller to work again, the change of the pressure value of the quartz sand proppant particles under the shearing action of the shearing blade 631 is detected, until the quartz sand proppant particles are broken; the maximum pressure value detected is taken as the shear strength of the quartz sand proppant particles.

[0070] Step S7, repeat the above steps until the shear strength of each quartz sand proppant particle as the target to be tested on all narrow bands 800 is obtained, and the average value is taken as the final shear strength.

[0071] The embodiment can realize the test of the shear strength of the quartz sand proppant particles with a particle size of 6 mesh to 140 mesh, and perfect the comprehensive performance evaluation data of the quartz sand proppant. Meanwhile, in the embodiment, considering the problem of small particle size of the quartz sand proppant particles and the tedious sampling operation, the multiple quartz sand proppant particles are collected by using the epoxy adhesive resin adhesion mode, which can greatly improve the test efficiency; furthermore, since the quartz sand proppant particles are adhered on the narrow band, and then the narrow band and the quartz sand proppant particles are placed together and fixed at the detection position, the rolling phenomenon of the quartz sand proppant particles can be avoided.

Claims

1. A device for testing the shear strength of inorganic proppant, characterized in that, include: Support base; A rectangular test base plate, which is vertically disposed on the upper surface of the support base; A left support slider assembly, which is slidably disposed on one side surface of the test base plate; A right support slider assembly is slidably disposed on one side surface of the test base plate; the right support slider assembly and the left support slider assembly are arranged opposite to each other and located on the same side of the test base plate; A shearing assembly includes a synchronously moving pressure sensor and a shearing rod; the shearing rod is located above the left and right support slider assemblies and is perpendicular to the support base; the lower end of the shearing rod gradually tapers into a flat-bladed shearing edge with a thickness of 0.05~0.1μm; the pressure sensor is electrically connected to a controller. A magnifying observation component, wherein the magnifying observation component has a magnifying glass.

2. The inorganic proppant shear strength testing device according to claim 1, characterized in that, The upper surface of the support base is also provided with a horizontal adjustment component.

3. The inorganic proppant shear strength testing device according to claim 1 or 2, characterized in that, Starting from the upper part of the sidewalls on both sides along the length of the test base plate, a left mounting groove and a right mounting groove in the shape of an inverted "T" are respectively opened along the length of the test base plate; the center of the left mounting groove and the center of the right mounting groove are equidistant from the upper surface of the support base, and the two are not connected; the horizontal portions of the left mounting groove and the right mounting groove extend to one side surface of the test base plate; a portion of the left support slider assembly and the right support slider assembly are slidably disposed in the left mounting groove and the right mounting groove, respectively.

4. The inorganic proppant shear strength testing device according to claim 3, characterized in that, The test base plate has a left locking threaded hole and a right locking threaded hole on both sides of its top surface along the length direction; the left locking threaded hole and the right locking threaded hole respectively extend to the vertical part of the left mounting groove and the right mounting groove, and are respectively fitted with a left locking screw and a right locking screw.

5. The inorganic proppant shear strength testing device according to claim 3, characterized in that, The left support slider assembly includes: The left slider body is located at the left mounting slot and is in contact with one side surface of the test base plate; the height of the left slider body is greater than the width of the slot at the opening of the left mounting slot; the end of the left slider body facing the right support slider assembly is triangular prism-shaped and has an upper left support slope and a lower left avoidance slope. A left T-shaped sliding part is provided in the left mounting groove and connected to the left slider body; the length of the left T-shaped sliding part is less than the length of the left slider body, and the two are flush with the side wall away from the right support slider assembly. The right support slider assembly includes: The right slider body is located at the right mounting slot and is in contact with one side surface of the test base plate; the height of the right slider body is greater than the width of the slot at the opening of the right mounting slot; the end of the right slider body facing the left support slider assembly is triangular prism-shaped and has an upper right support slope and a lower right avoidance slope. A right T-shaped sliding part is provided in the right mounting groove and connected to the right slider body; the length of the right T-shaped sliding part is less than the length of the right slider body, and both are flush with the side wall away from the left support slider assembly.

6. The inorganic proppant shear strength testing device according to claim 5, characterized in that, The left support slider assembly also includes: The left ear plate is located near the left edge of one side surface of the test base plate, corresponding to the slot of the left mounting groove, and the left ear plate is provided with a through left mounting threaded hole. A left screw, one end of which is movably connected to the side wall of the left slider body away from the right support slider assembly; the other end of the left screw passes through the left mounting threaded hole and is provided with a left handle; The right support slider assembly also includes: The right ear plate is located near the right edge of one side surface of the test base plate, corresponding to the slot of the right mounting groove, and the right ear plate is provided with a through right mounting threaded hole. A right screw, one end of which is movably connected to the side wall of the right slider body away from the left support slider assembly; the other end of the right screw passes through the right mounting threaded hole and is provided with a right handle.

7. The inorganic proppant shear strength testing device according to claim 5 or 6, characterized in that, A vertical marking line is provided at the vertical center position of one side surface of the test base plate where the left support slider assembly and the right support slider assembly are located; a horizontal marking line is provided on one side surface of the test base plate corresponding to the groove length direction of the left mounting groove and the right mounting groove; the horizontal marking line and the vertical marking line intersect in a cross shape. During the sliding process of the left slider body and the right slider body, the movement trajectory of the edge at the intersection of the upper left support slope and the lower left avoidance slope, and the movement trajectory of the edge at the intersection of the upper right support slope and the lower right avoidance slope coincide with the surface of the horizontal marking line that is parallel to the upper surface of the support base. When the shearing rod moves vertically, the movement trajectory of the shearing blade coincides with the surface of the horizontal marking line that is perpendicular to the upper surface of the support base.

8. The inorganic proppant shear strength testing device according to claim 5 or 6, characterized in that, The angle between the upper left support slope and the upper surface of the support base is 20~80°; The angle between the upper right support slope and the upper surface of the support base is 20~80°.

9. The inorganic proppant shear strength testing device according to any one of claims 1, 2, and 4-6, characterized in that, The shearing component also includes: An inverted "L"-shaped support plate is vertically disposed on the other side of the test base plate opposite to the left support slider assembly and the right support slider assembly; the top of the support plate is higher than the top of the test base plate. A hydraulic cylinder is located above the left and right support slider assemblies and is connected to the end of the horizontal portion of the support plate; the piston rod of the hydraulic cylinder is perpendicular to the support base and is connected to the upper end of the shear rod; the pressure sensor is located between the lower movable free end of the piston rod and the upper end of the shear rod.

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