Device and method for detecting shear strength of inorganic proppant

Abstract

The invention aims to provide a device and a method for detecting the shear strength of an inorganic proppant, 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. The shear strength detection method is implemented based on the inorganic proppant shear strength detection device. 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] The present invention relates to the field of detection technology, and in particular to a device and method for detecting shear strength of an inorganic proppant. Background Art

[0002] Hydraulic fracturing refers to the technology of using high closure pressure to fracture low permeability oil and gas wells to create cracks and provide high conductivity channels for oil and natural gas. Proppant is the key material for fracturing construction. Quartz sand proppant has the advantages of lower density than ceramsite proppant, wider distribution and low price. It is the best proppant choice for shallow well production, the largest market share of proppant varieties, and one of the research hotspots.

[0003] For example, Chinese invention patent application CN112342011A discloses a pressure-resistant quartz sand proppant for fracturing and a production method thereof, which comprises the following steps: first, at a temperature of 10°C to 50°C, adding the required amount of washed quartz sand, sodium silicate, epoxy resin, and sodium hydroxide under stirring for a reaction time of 0.3 min to 2 min, then adding urotropine and ammonium chloride under stirring for a reaction time of 0.3 min to 2 min, and adding calcium stearate for a reaction time of 0.3 min to 1 min; then, under continued stirring, the temperature is 95°C to 120°C, and the reaction time is 30 min to 60 min to obtain the quartz sand proppant for fracturing.

[0004] In actual use, quartz sand proppants need to withstand the pressure at the bottom cracks, and they will also be subject to a certain shearing effect when mixed with fracturing fluid and input into the bottom cracks. However, the prior art generally does not provide shear strength data for quartz sand proppants, so it is impossible to accurately and comprehensively evaluate the comprehensive performance of quartz sand proppants. Summary of the invention

[0005] The present invention aims to provide a shear strength detection device and method for inorganic proppants, which can realize the shear strength test of quartz sand proppant particles with a particle size of 6 mesh to 140 mesh, and improve the comprehensive performance evaluation data of quartz sand proppants.

[0006] The technical solution adopted by the present invention is:

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

[0008] Support base;

[0009] A rectangular plate-shaped test base plate, wherein the test base plate is vertically arranged on the upper surface of the support base;

[0010] A left supporting slider assembly, wherein the left supporting slider assembly is slidably disposed on a side surface of the test base plate;

[0011] A right supporting slider assembly, wherein the right supporting slider assembly is slidably disposed on a side surface of the test base plate; the right supporting slider assembly and the left supporting slider assembly are arranged opposite to each other and are located on the same side of the test base plate;

[0012] A shearing assembly, wherein the shearing assembly has a synchronously moving pressure sensor and a shearing rod; the shearing rod is located above the left supporting slider assembly and the right supporting slider assembly and is perpendicular to the supporting base; the lower end of the shearing rod gradually shrinks to form a flat blade-shaped shearing blade, and the thickness of the shearing blade is 0.05-0.1 μm; the pressure sensor is electrically connected to the controller;

[0013] A magnifying observation component is provided, wherein the magnifying observation component has a magnifying glass.

[0014] Furthermore, a level adjustment component is provided on the upper surface of the support base.

[0015] Furthermore, starting from the upper part of the side walls on both sides of the length direction of the test base plate, a left mounting groove and a right mounting groove in an inverted "T" shape are respectively opened 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 the two are not connected; the horizontal parts of the left mounting groove and the right mounting groove pass through 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 slidably set in the left mounting groove and the right mounting groove.

[0016] Furthermore, a left locking threaded hole and a right locking threaded hole are opened on both sides of the length direction of the top surface of the test base plate; the left locking threaded hole and the right locking threaded hole respectively penetrate the vertical parts of the left mounting groove and the right mounting groove, and are respectively provided with a left locking screw and a right locking screw.

[0017] Furthermore, the left supporting slider assembly comprises:

[0018] A left slider body, the left slider body is located at the left mounting groove and fits with a side surface of the test base plate; the height of the left slider body is greater than the slot width at the slot opening of the left mounting groove; the left slider body is in a triangular prism shape at one end facing the right supporting slider assembly, and has an upper left supporting inclined surface and a lower left avoiding inclined surface;

[0019] A left T-shaped sliding part, the left T-shaped sliding part is arranged 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 of the side away from the right supporting slider assembly;

[0020] The right supporting slider assembly comprises:

[0021] A right slider body, the right slider body is located at the right mounting groove and fits with a 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 groove; the right slider body is in a triangular prism shape at one end facing the left supporting slider assembly, and has a right upper supporting inclined surface and a right lower avoiding inclined surface;

[0022] A right T-shaped sliding part, wherein the right T-shaped sliding part is cooperatively arranged in the right mounting groove and connected to the right slider body; the length of the right T-shaped sliding part is smaller than the length of the right slider body, and the two are flush with the side wall on one side away from the left supporting slider assembly.

[0023] Furthermore, the left supporting slider assembly further comprises:

[0024] A left ear plate, wherein the left ear plate is arranged near the left edge of a side surface of the test base plate corresponding to the notch of the left mounting slot, and a through left mounting threaded hole is opened on the left ear plate;

[0025] A left screw rod, one end of which is movably connected to a side wall of the left slider body away from the right supporting slider assembly; the other end of the left screw rod fits through the left mounting threaded hole and is provided with a left handle;

[0026] The right supporting slider assembly also includes:

[0027] A right ear plate, the right ear plate is arranged near the right edge of one side surface of the test base plate corresponding to the notch of the right mounting slot, and a through right mounting threaded hole is opened on the right ear plate;

[0028] A right screw rod, one end of which is movably connected to a side wall of the right slider body away from the left supporting slider assembly; the other end of the right screw rod cooperates and passes through the right mounting threaded hole, and is provided with a right handle.

[0029] Further, a vertical marking line is provided at the vertical center position of one side surface of the test base plate where the left supporting slider assembly and the right supporting slider assembly are located; a horizontal marking line is provided on 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 marking line and the vertical marking line are in a cross-intersecting state;

[0030] During the sliding process of the left slider body and the right slider body, the moving track of the edge at the intersection of the upper left supporting slope and the lower left avoiding slope, and the moving track of the edge at the intersection of the upper right supporting slope and the lower right avoiding slope coincide with a surface parallel to the upper surface of the supporting base where the transverse marking line is located;

[0031] When the shear rod moves vertically, the moving track of the shear blade coincides with a surface perpendicular to the upper surface of the support base where the transverse marking line is located.

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

[0033] The included angle between the upper right supporting inclined surface and the upper surface of the supporting base is 20-80°.

[0034] Furthermore, the shearing assembly further comprises:

[0035] an inverted "L"-shaped support plate, the support plate being vertically arranged 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 being higher than the top of the test base plate;

[0036] A hydraulic cylinder, wherein the hydraulic cylinder is located above the left supporting slider assembly and the right supporting slider assembly and is connected to the end of the horizontal portion of the support plate; the piston rod of the hydraulic cylinder is vertically oriented toward the supporting 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] Based on the same inventive concept, the present invention also provides a method for detecting the shear strength of an inorganic proppant, which is implemented based on the aforementioned inorganic proppant shear strength detection device, and comprises the following steps:

[0038] Step S1, taking a paper with a thickness of 0.05-0.1 μm and cutting it into a narrow strip with a width of 2-10 mm;

[0039] Step S2, along the length direction of the narrow strip, use a thin sheet with a thickness of 0.05-0.1 μm or a fine needle with a diameter of 0.05-0.1 μm to dip the epoxy adhesive resin and then scratch the narrow strip to form a straight resin adhesive tape, and then sprinkle the quartz sand proppant to be tested on the narrow strip, and wait for the epoxy resin to be completely cured;

[0040] Step S3, removing the quartz sand proppant particles on the narrow band that are not adhered by the epoxy adhesive resin, and observing the fixation of each quartz sand proppant particle adhered to the linear resin adhesive tape one by one through a magnifying glass; if the depth of the quartz sand proppant particle invading the linear resin adhesive tape is less than half of the particle size of the quartz sand proppant particle, it is regarded as a target to be selected; if there are multiple adjacent targets to be selected, the target to be selected with the smallest depth of invading the linear resin adhesive tape is retained and regarded as the target to be measured; the interval between adjacent targets to be measured is 10-50 mm;

[0041] Step S4, move the left slider body and the right slider body, and observe the moving process through a magnifying glass, so that the distance between the lower edge of the upper left support slope and the vertical marking line, and the distance between the lower edge of the upper right support slope and the vertical marking line are approximately the same, and the distance between the lower edge of the upper left support slope and the lower edge of the upper right support slope is smaller than the particle size of the target to be measured; with a quartz sand proppant particle as the target to be measured as the center, bend the narrow band into a V shape, and then place the narrow band on the left slider body and the right slider body, observe and adjust the quartz sand proppant particle through a magnifying glass to be located near the position corresponding to the intersection of the vertical marking line and the horizontal marking line;

[0042] Step S5, moving the shear rod so that the shear blade contacts the top of the quartz sand proppant particle and then stops moving, and observing the relative positions of the contact point between the shear blade and the quartz sand proppant particle, the contact point between the quartz sand proppant particle and the upper left supporting inclined surface, and the contact point between the quartz sand proppant particle and the upper right supporting inclined surface through a magnifying glass to form a three-point shear structure;

[0043] Step S6, setting the detection value of the pressure sensor to zero, moving the shear rod to continue moving, monitoring the change in the pressure value of the quartz sand proppant particles under the shearing action of the shear blade, until the quartz sand proppant particles are broken; the maximum pressure value detected is used as the shear strength of the quartz sand proppant particles;

[0044] Step S7, repeat the above steps until the shear strength of each quartz sand proppant particle to be measured is obtained, and the average value is taken as the final shear strength.

[0045] The beneficial effects of the present invention are:

[0046] 1. The inorganic proppant shear strength detection device of the present invention has a relatively simple structure and is easy to use. It can test the shear strength of quartz sand proppant particles with a particle size of 6 mesh to 140 mesh, and improve the comprehensive performance evaluation data of quartz sand proppant.

[0047] 2. The inorganic proppant shear strength detection method of the present invention can realize the shear strength test of quartz sand proppant particles with a particle size of 6 mesh to 140 mesh, and improve the comprehensive performance evaluation data of quartz sand proppant. At the same time, the present invention takes into account the problem that the particle size of quartz sand proppant particles is small and the sampling operation is cumbersome, and designs to collect multiple quartz sand proppant particles by using epoxy adhesive resin adhesion, which can greatly improve the test efficiency; at the same time, because the quartz sand proppant particles are adhered to the narrow band, and then the narrow band and the quartz sand proppant particles are placed together at the detection position and fixed, the rolling phenomenon of the quartz sand proppant particles can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] 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.

[0049] Figure 1 This is a front view of the inorganic proppant shear strength detection device in Example 1.

[0050] Figure 2 Schematic diagram of the three-dimensional structure of the inorganic proppant shear strength testing device in Example 1 Figure 1 .

[0051] Figure 3 The three-dimensional structure of the inorganic proppant shear strength testing device in the embodiment is shown in FIG. Figure 2 .

[0052] Figure 4 This is a schematic diagram of the three-dimensional structure of the left supporting slider assembly in Example 1.

[0053] Figure 5 This is a schematic diagram of the three-dimensional structure of the right supporting slider assembly in Example 1.

[0054] The accompanying drawings are marked as follows:

[0055] 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-magnification observation assembly, 800-narrow band.

[0056] 210-Adjustable support feet, 220-Bubble level.

[0057] 310-vertical marking line, 320-left mounting slot, 330-right mounting slot, 340-horizontal marking line, 350-left locking threaded hole, 360-right locking threaded hole.

[0058] 410-left ear plate, 411-left mounting threaded hole, 420-left slider body, 421-left upper supporting inclined plane, 422-left lower avoidance inclined plane, 430-left T-shaped sliding part, 440-left screw, 450-left handle.

[0059] 510-right ear plate, 511-right mounting threaded hole, 520-right slider body, 521-right upper supporting inclined plane, 522-right lower avoidance inclined plane, 530-right T-shaped sliding part, 540-right screw rod, 550-right handle.

[0060] 610-support plate, 620-hydraulic cylinder, 621-piston rod, 622-pressure sensor, 630-shear rod, 631-shear blade.

[0061] 710- magnifying glass, 720- universal adjustment bracket. DETAILED DESCRIPTION

[0062] 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.

[0063] 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.

[0064] The embodiments of the invention are described in detail below with reference to the accompanying drawings.

[0065] Example 1

[0066] Figure 1 This is a front view of the inorganic proppant shear strength detection device in Example 1. Figure 2 Schematic diagram of the three-dimensional structure of the inorganic proppant shear strength testing device in Example 1 Figure 1 . Figure 3 The three-dimensional structure of the inorganic proppant shear strength testing device in the embodiment is shown in FIG. Figure 2 .like Figures 1 to 3 As shown in , the inorganic proppant shear strength testing device includes a supporting base 100. The supporting base 100 is the foundation of the entire shear strength testing device, and is roughly in the shape of a rectangular plate; an adjustable supporting foot 210 is respectively provided at the four corners of the lower surface of the supporting base 100, and a bubble level 220 is respectively provided near the middle position of one edge of the long side and near the middle position of one edge of the short side on the upper surface of the supporting base 100. In this embodiment, the adjustable supporting foot 210 and the bubble level 220 together constitute the horizontal adjustment component 200; by observing the real-time status of the two bubble levels 220, and then by screwing the adjustable supporting foot 210, the base 100 can finally be made to present a roughly horizontal state, providing a good foundation for the shear strength test process.

[0067] like Figures 1 to 3 As shown in , the inorganic proppant shear strength testing device further 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 to each other to provide necessary support for the quartz sand proppant particles when testing the shear strength; meanwhile, the structures of the left support slider assembly 400 and the right support slider assembly 500 are substantially the same.

[0068] The test base plate 300 is roughly in the shape of a rectangular plate, which is vertically arranged on the upper surface of the support base 100, roughly parallel to one side of the long side of the support base 100, and a vertical marking 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 an inverted "T" shape are respectively opened from the upper part of the side walls on both sides of the length direction of the test base plate 300; the left mounting groove 320 and the right mounting groove 330 are arranged in a mirror-symmetrical manner with the vertical marking line 310 on one side surface of the test base plate 300 as the symmetry center, and the horizontal parts of the left mounting groove 320 and the right mounting groove 330 pass through to one side surface of the test base plate 300 , the left mounting groove 320 and the right mounting groove 330 are not connected; a horizontal marking line 340 is provided on one 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, and the horizontal marking line 340 and the vertical marking line 310 are in a cross-intersecting state; a left locking threaded hole 350 and a right locking threaded hole 360 ​​are provided on both sides of the length direction of the top surface of the test base plate 300, and the left locking threaded hole 350 and the right locking threaded hole 360 ​​are respectively penetrated to the vertical parts of the left mounting groove 320 and the right mounting groove 330; a left locking screw and a right locking screw (not shown in the figure) are also respectively provided in the left locking threaded hole 350 and the right locking threaded hole 360. In this embodiment, a portion of the support slider assembly 400 and the right support slider 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 after the positions of the left mounting groove 320 and the right mounting groove 330 are determined.

[0069] Figure 4 Schematic diagram of the three-dimensional structure of the left supporting slider assembly in Example 1. Figure 4As shown in the figure, the left supporting 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 440. The left ear plate 410 is arranged near the left edge of the surface of one side of the test base plate 300 corresponding to the notch of the left mounting groove 320, and a through left mounting threaded hole 411 is provided on the left ear plate 410. The left slider body 420 is located at the left mounting groove 320 and fits with the surface of one side of the test base plate 300; the height of the left slider body 420 is greater than the groove width at the notch of the left mounting groove 320, and the width of the left slider body 420 is approximately 2-10 mm; the left slider body 420 is triangular prism-shaped at one end facing the right supporting slider assembly 500, and has a left upper supporting inclined surface 421 and a left lower avoiding inclined surface 422; the angle between the left upper supporting inclined surface 421 and the upper surface of the supporting base 100 is 20-80°. The left T-shaped sliding part 430 is arranged in the left mounting groove 320 and 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 two are flush with the side wall of the side away from the right support slider assembly 500. 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 screwing 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 synchronously slid along the length direction of the left mounting groove 320, and during the sliding process, the moving track of the edge at the intersection of the left upper support inclined surface 421 and the left lower avoidance inclined surface 422 coincides with the side parallel to the upper surface of the support base 100 where the horizontal marking line 340 is located.

[0070] Figure 5 Schematic diagram of the three-dimensional structure of the left supporting slider assembly in Example 1. Figure 5As shown in the figure, the right support slider assembly 500 has a right ear plate 510, a right slider body 520, a right T-shaped sliding part 530 and a right screw 540. The right ear plate 510 is arranged near the right edge of one side surface of the test base plate 300 corresponding to the notch of the right mounting groove 330, and a through right mounting threaded hole 511 is provided on the right ear plate 510. The right slider body 520 is located at the right mounting groove 330 and fits with one side surface of the test base plate 300; the height of the right slider body 520 is greater than the groove width at the notch of the right mounting groove 330, and the width of the right slider body 520 is approximately 2-10 mm; the right slider body 520 is in a triangular prism shape at one end facing the left support slider assembly 400, and has a right upper support inclined surface 521 and a right lower avoidance inclined surface 522; the 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 groove 330 and connected to 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 two are flush with the side wall of the side away from the right support slider assembly 500. One end of the right screw rod 540 is movably connected to 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 groove 330, and during the sliding process, the moving track of the edge at the intersection of the right upper support inclined surface 521 and the right lower avoidance inclined surface 522 coincides with the side parallel to the upper surface of the support base 100 where the transverse marking line 340 is located. At the same time, in this embodiment, by adjusting the distance between the left slider body 420 and the right slider body 520, and finally locking the position by the left locking screw and the right locking screw, the test support requirements of quartz sand proppant particles of different particle sizes can be met, and the corresponding quartz sand proppant particles are restricted to the bottom of the V-shaped structure formed by the upper left support slope 421 and the upper right support slope 521.

[0071] like Figures 1 to 3As shown in , the inorganic proppant shear strength testing device also includes a shear assembly 600. The shear assembly 600 includes a support plate 610, a hydraulic cylinder 620 and a shear rod 630. The support plate 610 is in an inverted "L" shape as a whole and is located on the other side of the test base plate 300; the support plate 610 is vertically connected to the test base plate 300 and the support base 100 at the same time 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 cylinder 620 is located above the left support slider assembly 400 and the right support slider assembly 500, and is connected to the end of the horizontal part of the support plate 610; the piston rod 621 of the hydraulic cylinder 620 is vertically facing the support base 100. The shear rod 630 is arranged vertically, and its upper end is connected to the lower movable free end of the piston rod 621, and a pressure sensor 622 is also provided between the upper end of the shear rod 630 and the piston rod 621; the lower end of the shear rod 630 gradually shrinks to form a flat-blade-shaped shear blade 631, and the thickness of the shear blade 631 is approximately 0.05~0.1μm; when the shear rod 630 moves with the piston rod 621, the moving trajectory of the shear blade 631 coincides with a surface perpendicular to the upper surface of the support base 100 where the horizontal marking line 340 is located, and the shear rod, the piston rod 621 and the pressure sensor 622 do not touch the test base plate 300 during the synchronous movement. In this embodiment, the piston rod 621 is controlled to move downward by a controller (not shown in the figure), so that the shearing blade 631 of the shear rod 630 contacts the quartz sand proppant particles placed between the left slider body 420 and the right slider body 520, and the pressure sensor 622 records the change of the pressure signal during the test. After the controller calculates and processes, the corresponding pressure value can be used as the shear strength test result of the quartz sand proppant particles.

[0072] like Figures 1 to 3 As shown in , the inorganic proppant shear strength detection device also includes a magnifying observation component 700. The magnifying observation component 700 is located on one side of the test base plate 300 where the left support slider component 400 and the right support slider component 500 are located; the magnifying observation component 700 has a magnifying glass 710 and a universal adjustment bracket 720; one end of the universal adjustment bracket 720 is connected to the magnifying glass 710, and the other end of the universal adjustment bracket 720 is connected to the magnifying glass 710; the magnification of the magnifying glass 710 can be selected according to demand, such as 10 times, 50 times, 100 times, etc. In this embodiment, the magnifying glass 710 can be used to observe the relative positions of the left slider body 420, the right slider body 520 and the shear blade 631 and the quartz sand proppant particles.

[0073] The inorganic proppant shear strength detection device in this embodiment has a relatively simple structure and is easy to use. It can test the shear strength of quartz sand proppant particles with a particle size of 6 mesh to 140 mesh, and improve the comprehensive performance evaluation data of quartz sand proppant.

[0074] Example 2

[0075] This embodiment provides an inorganic proppant shear strength detection method, which is implemented based on the inorganic proppant shear strength detection device described in Example 1. The inorganic proppant shear strength detection method includes the following steps:

[0076] Step S1, taking A4-sized paper with a thickness of 0.05-0.1 μm and cutting it into narrow strips 800 with a width of approximately 2-10 mm; the number of narrow strips 800 can be selected according to demand;

[0077] Step S2, along the length direction of the narrow strip 800, use a thin sheet with a thickness of 0.05-0.1 μm or a fine needle with a diameter of 0.05-0.1 μm to dip the epoxy adhesive resin and then scratch the narrow strip 800 to form a straight resin adhesive tape, the thickness of the straight resin adhesive tape is about 0.01-0.08 μm, and then sprinkle the quartz sand proppant to be tested on the narrow strip 800, and wait for the epoxy resin to be completely cured;

[0078] Step S3, remove the quartz sand proppant on the narrow band 800 that is not adhered by the epoxy adhesive resin, and observe the fixation of each quartz sand proppant particle adhered to the linear resin adhesive tape one by one through the magnifying glass 710; select the quartz sand proppant particles that penetrate the linear resin adhesive tape to a depth less than half of their own particle size as the target to be measured; the interval between adjacent targets to be measured is 10-50 mm, forming a quartz sand proppant particle belt distributed at intervals;

[0079] Step S4, screw the left handle 450 and the right handle 550, move the left slider body 420 and the right slider body 520, and observe the moving process through the magnifying glass 810, so that the distance between the lower edge of the upper left supporting slope 421 and the vertical marking line 310, and the distance between the lower edge of the upper right supporting slope 521 and the vertical marking line 310 are approximately the same, and the distance between the lower edge of the upper left supporting slope 421 and the lower edge of the upper right supporting slope 521 is smaller than the particle size of the target to be measured; with a quartz sand proppant particle as the target to be measured as the center, bend the narrow band 800 into a V shape, and then place the narrow band 800 on the left slider body 420 and the right slider body 520, observe and adjust the quartz sand proppant particle at the position corresponding to the intersection of the vertical marking line 310 and the horizontal marking line 340 through the magnifying glass 810, and the narrow band 800 fits with the upper left supporting slope 421 and the upper right supporting slope 521;

[0080] Step S5, the controller controls the hydraulic cylinder 620 to work, drives the piston rod 621 and the shear rod 630 to move, so that the shear blade 631 stops moving after contacting the top of the quartz sand proppant particle, and observes the relative positions of the contact points between the shear blade 631 and the quartz sand proppant particle, the contact points between the quartz sand proppant particle and the upper left support slope 421, and the contact points between the quartz sand proppant particle and the upper right support slope 521 through the magnifying glass 710 to form a three-point shear structure; if necessary, fine-tune the position of the quartz sand proppant particle;

[0081] Step S6, reset the detection value of the pressure sensor 622 to zero, and then control the hydraulic cylinder 620 to work again by the controller, and detect the change of the pressure value of the quartz sand proppant particles under the shearing action of the shear blade 631 until the quartz sand proppant particles are broken; the maximum pressure value detected is used as the shear strength of the quartz sand proppant particles.

[0082] Step S7, repeat the above steps until the shear strength of each quartz sand proppant particle as the test target on all narrow bands 800 is obtained, and the average value is taken as the final shear strength.

[0083] The inorganic proppant shear strength detection method of this embodiment can realize the shear strength test of quartz sand proppant particles with a particle size of 6 mesh to 140 mesh, and improve the comprehensive performance evaluation data of quartz sand proppant. At the same time, considering the problem that the particle size of quartz sand proppant particles is small and the sampling operation is cumbersome, the design of collecting multiple quartz sand proppant particles by epoxy adhesive resin adhesion can greatly improve the test efficiency; at the same time, because the quartz sand proppant particles are adhered to the narrow band, and then the narrow band and the quartz sand proppant particles are placed together at the detection position and fixed, the rolling phenomenon of the quartz sand proppant particles can be avoided.

Claims

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

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

3. The inorganic proppant shear strength detection device according to claim 1 or 2, characterized in that: Starting from the upper part of the side walls on both sides of the length direction of the test base plate, a left mounting groove and a right mounting groove in an inverted "T" shape are respectively opened 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 the two are not connected; the horizontal parts of the left mounting groove and the right mounting groove pass through 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 slidably set in the left mounting groove and the right mounting groove.

4. The inorganic proppant shear strength detection device according to claim 3, characterized in that: A left locking threaded hole and a right locking threaded hole are opened on both sides of the top surface of the test base plate in the length direction; the left locking threaded hole and the right locking threaded hole respectively penetrate the vertical parts of the left mounting groove and the right mounting groove, and are respectively equipped with a left locking screw and a right locking screw.

5. The inorganic proppant shear strength detection device according to claim 3, characterized in that: The left supporting slider assembly comprises: A left slider body, the left slider body is located at the left mounting groove and fits with a side surface of the test base plate; the height of the left slider body is greater than the slot width at the slot opening of the left mounting groove; the left slider body is in a triangular prism shape at one end facing the right supporting slider assembly, and has an upper left supporting inclined surface and a lower left avoiding inclined surface; A left T-shaped sliding part, the left T-shaped sliding part is arranged 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 of the side away from the right supporting slider assembly; The right supporting slider assembly comprises: A right slider body, the right slider body is located at the right mounting groove and fits with a 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 groove; the right slider body is in a triangular prism shape at one end facing the left supporting slider assembly, and has a right upper supporting inclined surface and a right lower avoiding inclined surface; A right T-shaped sliding part, wherein the right T-shaped sliding part is cooperatively arranged in the right mounting groove and connected to the right slider body; the length of the right T-shaped sliding part is smaller than the length of the right slider body, and the two are flush with the side wall on one side away from the left supporting slider assembly.

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

7. The inorganic proppant shear strength detection 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 supporting slider assembly and the right supporting slider assembly are located; a horizontal marking line is provided on 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 marking line and the vertical marking line are in a cross-intersecting state; During the sliding process of the left slider body and the right slider body, the moving track of the edge at the intersection of the upper left supporting slope and the lower left avoiding slope, and the moving track of the edge at the intersection of the upper right supporting slope and the lower right avoiding slope coincide with a surface parallel to the upper surface of the supporting base where the transverse marking line is located; When the shear rod moves vertically, the moving track of the shear blade coincides with a surface perpendicular to the upper surface of the support base where the transverse marking line is located.

8. The inorganic proppant shear strength detection 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 included angle between the upper right supporting inclined surface and the upper surface of the supporting base is 20-80°.

9. The inorganic proppant shear strength testing device according to any one of claims 1, 2 and 4 to 6, characterized in that: The shearing assembly also includes: an inverted "L"-shaped support plate, the support plate being 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 being higher than the top of the test base plate; A hydraulic cylinder, wherein the hydraulic cylinder is located above the left supporting slider assembly and the right supporting slider assembly and is connected to the end of the horizontal portion of the support plate; the piston rod of the hydraulic cylinder is vertically oriented toward the supporting 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.

10. A method for detecting shear strength of an inorganic proppant, characterized in that: The inorganic proppant shear strength detection device according to any one of claims 6 to 9 is implemented, comprising the following steps: Step S1, taking a paper with a thickness of 0.05-0.1 μm and cutting it into a narrow strip with a width of 2-10 mm; Step S2, along the length direction of the narrow strip, use a thin sheet with a thickness of 0.05-0.1 μm or a fine needle with a diameter of 0.05-0.1 μm to dip the epoxy adhesive resin and then scratch the narrow strip to form a straight resin adhesive tape, and then sprinkle the quartz sand proppant to be tested on the narrow strip, and wait for the epoxy resin to be completely cured; Step S3, removing the quartz sand proppant particles on the narrow band that are not adhered by the epoxy adhesive resin, and observing the fixation of each quartz sand proppant particle adhered to the linear resin adhesive tape one by one through a magnifying glass; selecting the quartz sand proppant particles whose depth of intrusion into the linear resin adhesive tape is less than half of their own particle size as the target to be measured; the interval between adjacent targets to be measured is 10-50 mm; Step S4, move the left slider body and the right slider body, and observe the moving process through a magnifying glass, so that the distance between the lower edge of the upper left support slope and the vertical marking line, and the distance between the lower edge of the upper right support slope and the vertical marking line are approximately the same, and the distance between the lower edge of the upper left support slope and the lower edge of the upper right support slope is smaller than the particle size of the target to be measured; with a quartz sand proppant particle as the target to be measured as the center, bend the narrow band into a V shape, and then place the narrow band on the left slider body and the right slider body, observe and adjust the quartz sand proppant particle through a magnifying glass to be located near the position corresponding to the intersection of the vertical marking line and the horizontal marking line; Step S5, moving the shear rod so that the shear blade contacts the top of the quartz sand proppant particle and then stops moving, and observing the relative positions of the contact point between the shear blade and the quartz sand proppant particle, the contact point between the quartz sand proppant particle and the upper left supporting inclined surface, and the contact point between the quartz sand proppant particle and the upper right supporting inclined surface through a magnifying glass to form a three-point shear structure; Step S6, setting the detection value of the pressure sensor to zero, moving the shear rod to continue moving, monitoring the change in the pressure value of the quartz sand proppant particles under the shearing action of the shear blade, until the quartz sand proppant particles are broken; the maximum pressure value detected is used as the shear strength of the quartz sand proppant particles; Step S7, repeat the above steps until the shear strength of each quartz sand proppant particle to be measured on all narrow bands is obtained, and the average value is taken as the final shear strength.

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