CN113237742B - Clamp holder for indoor hydraulic fracturing experiment - Google Patents

Clamp holder for indoor hydraulic fracturing experiment Download PDF

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Publication number
CN113237742B
CN113237742B CN202110630507.5A CN202110630507A CN113237742B CN 113237742 B CN113237742 B CN 113237742B CN 202110630507 A CN202110630507 A CN 202110630507A CN 113237742 B CN113237742 B CN 113237742B
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plug
fracturing
fracturing pipe
pipe
channel
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CN113237742A (en
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郑思平
林缅
江文滨
姬莉莉
曹高辉
徐志朋
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Institute of Mechanics of CAS
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G01N3/04—Chucks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
    • G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
    • G01N23/046—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material using tomography, e.g. computed tomography [CT]
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G01N3/06—Special adaptations of indicating or recording means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
    • G01N3/12—Pressure testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0001—Type of application of the stress
    • G01N2203/0003—Steady
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0016—Tensile or compressive
    • G01N2203/0019—Compressive
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/003—Generation of the force
    • G01N2203/0042—Pneumatic or hydraulic means
    • G01N2203/0048—Hydraulic means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/06—Indicating or recording means; Sensing means
    • G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
    • G01N2203/0647—Image analysis

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  • Chemical & Material Sciences (AREA)
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  • General Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
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  • General Physics & Mathematics (AREA)
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  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
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  • Radiology & Medical Imaging (AREA)
  • Theoretical Computer Science (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The invention relates to the technical field of rock physical property experiment devices, and provides a clamp holder for an indoor hydraulic fracturing experiment, which comprises a clamp holder body, wherein a fracturing pipe is arranged in the clamp holder body, and the fracturing pipe is connected with a plug; a first channel is axially arranged at the center of the fracturing pipe along the fracturing pipe, a through hole is formed in the fracturing pipe far away from the plug side, and a groove is formed in the fracturing pipe close to the plug side; a second channel is arranged in the center of the plug along the axial direction of the plug, a first connecting hole is formed in the end part of the plug close to the fracturing pipe side, and a second connecting hole is formed in the end part of the plug far away from the fracturing pipe side; by adopting the technical scheme, the fracturing pipe and the plug can be directly used for CT scanning in the holder body, the hydraulic fracturing of the rock core can be more accurately extracted, the O-shaped ring is added at the groove to ensure the sealing between the fracturing pipe and the plug, the fracturing pipe is an irregular cylindrical pipe and does not need to be disassembled, the rock core does not need to be cut, and the rock core cannot be damaged secondarily.

Description

Clamp holder for indoor hydraulic fracturing experiment
Technical Field
The invention relates to the technical field of rock physical property experiment devices, in particular to a rock physical property experiment device.
Background
Hydraulic fracturing is one of the key technologies for oil and gas stimulation of unconventional reservoirs, and because the action depth of the hydraulic fracturing on the reservoirs is often below the depth of thousands of meters, the direct observation of the expansion of hydraulic fracturing fractures in oil and gas production is very difficult. Numerous scholars then used laboratory experiments to simulate the hydraulic fracturing process underground. The indoor hydraulic fracturing has the characteristics of small core size, capability of simulating a complex environment and convenience in observation.
A common indoor fracturing system and apparatus is shown in fig. 1 and typically includes a recovery system, a fracturing system and a power system. The fracturing degree of the rock core is evaluated by utilizing the rock core crack expansion and the pressure change of the injection end in the experiment, and meanwhile, the improvement of the hydraulic fracturing process can be considered in the indoor experiment. The main purpose of hydraulic fracturing is to open channels between oil gas pores in a compact reservoir, so that the expansion of secondary micro-cracks of a core in the fracturing process is the focus of attention of researchers.
In the prior art, the hydraulic fracturing indoor experiment gradually realizes that the change of crack propagation is observed by utilizing CT scanning to fracture a rock core. However, due to the relatively high pressure of the injected fracturing fluid in the holder, metal type materials are often used for the frac line. Thus, before the core is CT scanned, the metal pipeline needs to be taken out from the middle of the core or the core needs to be cut. The above operation brings about the following problems:
(1) the fracturing fluid pressure needs to be relieved, the clamp is opened to disassemble the metal pipeline, and the fluid pressure disappears to cause the closure of part of secondary microcracks formed in the core fracturing process, so that the observation on later-stage CT equipment is influenced.
(2) The metal fracturing pipeline usually takes a long pipe as a main part and forms a seal with the core, so the core must be cut in the process of removing the metal pipeline, the core is damaged secondarily due to the cutting of the core, and secondary microcracks of the core are influenced by non-fracturing acting force.
How to effectively solve the technical problems is a problem to be solved by the technical personnel in the field at present.
Disclosure of Invention
In order to solve the technical problem or at least partially solve the technical problem, the invention provides a clamp for an indoor hydraulic fracturing experiment.
The clamp holder for the indoor hydraulic fracturing experiment comprises a clamp holder body, wherein a fracturing pipe is arranged in the clamp holder body, and the fracturing pipe is connected with a plug;
a first channel is arranged in the center of the fracturing pipe along the axial direction of the fracturing pipe, a through hole is formed in the fracturing pipe far away from the plug side, and a groove is formed in the fracturing pipe close to the plug side;
the center of the plug is provided with a second channel along the axial direction of the plug, the end part of the plug close to the fracturing pipe side is provided with a first connecting hole, and the end part of the plug far away from the fracturing pipe side is provided with a second connecting hole.
Optionally, the end of the first channel near the plug side is flush with the end of the fracturing pipe near the plug side;
the end of the first passage distal to the plug side is located within the fracturing pipe.
Optionally, a protruding part is arranged at the end part of the first channel far away from the plug side, and the protruding part protrudes towards the side far away from the plug side;
the first channel adjacent to the boss is vertically connected to the through hole.
Optionally, the diameter of the fracturing pipe close to the through hole side is smaller than the diameter of the fracturing pipe close to the groove side.
Optionally, the first connection hole is used to connect the fracturing pipe, an end of the first connection hole close to the second connection hole side is connected to the second channel, and the second channel is communicated with the first channel.
Optionally, the second connection hole includes a first connection portion, and the first connection portion near the first connection hole side is connected with a second connection portion.
Optionally, a concave portion is arranged at the end of the plug on the second connecting hole side.
Optionally, the holder body includes a moving portion horizontally connected to the fracturing pipe and the plug at the same time, the moving portion, the fracturing pipe and the plug together form a central piece, and a holding piece is connected to an outer surface of the central piece.
Optionally, the moving part includes a rock storage part connected to the fracturing pipe and the plug at the same time, the rock storage part far away from the fracturing pipe side is connected to a core plug in the horizontal direction, the end part of the core plug far away from the rock storage part side is connected to a first adapter, and the second connection hole is connected to a second adapter;
and the end part of the plug, which is far away from the side of the rock storage place, is also connected with a second adjusting press cap.
Optionally, the clamping member includes a rubber sleeve connected to the central member, and a cylinder is connected to a surface of the rubber sleeve away from the central member;
the end part of the cylinder body close to the first adapter is connected with a first adjusting press cap, the first adjusting press cap far away from the cylinder body is connected with a first pressing ring, and the first adjusting press cap far away from the center piece and the cylinder body are simultaneously connected with a first press cap;
the end portion of the barrel body close to the second adapter is connected with a second pressing ring, the end portion of the barrel body far away from the center piece is connected with a second pressing ring and a second pressing cap.
In the invention, the fracturing pipe simultaneously provided with the first channel, the through hole and the groove is combined with the plug simultaneously provided with the second channel, the first connecting hole and the second connecting hole, so that the clamp does not need to be opened, and the observation on the CT equipment in the later period can not be influenced. That is, the fracture tube and plug can be CT scanned directly within the holder body. And the extraction of the core hydraulic fracturing fracture is more accurate.
The O-shaped ring is added at the groove to ensure the sealing between the fracturing pipe and the plug, and meanwhile, the assembly and the replacement of the plug and the fracturing pipe are simplified.
The fracturing pipe is an irregular cylindrical pipe and does not need to be disassembled, so that the rock core does not need to be cut, and the rock core cannot be damaged secondarily.
Drawings
FIG. 1 is a schematic structural view of a holder body provided by the present invention;
FIG. 2 is a schematic structural view of a fracturing pipe provided by the present invention;
FIG. 3 is a schematic structural view of the plug provided in the present invention;
FIG. 4 is a scanned image of a CT scan provided by the present invention prior to fracturing;
FIG. 5 is a scanned image after CT scanned image fracturing provided by the present invention;
FIG. 6 is a core hydraulic fracture image extracted from a CT image provided by the present invention;
reference numerals:
1. a holder body;
2. fracturing the pipe; 21. a first channel; 22. a groove; 23. a boss portion; 24. a through hole;
3. a plug; 31. a second connection hole; 311. a first connection portion; 312. a second connecting portion; 32. a recessed portion; 33. a second channel; 34. a first connection hole;
4. a first adapter;
5. a first pressure ring;
6. first adjusting and pressing;
7. a core plug;
8. first pressing;
9. a rubber sleeve;
10. a barrel;
11. a rock storage;
12. second, pressing;
13. a second adapter;
14. a second pressure ring;
15. and the second adjustment is pressed.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and examples. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The following examples are intended to illustrate the invention, but not to limit it. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention. Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The terms "connected" and "coupled" are used broadly and may include, for example, a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The embodiment of the invention provides an indoor hydraulic fracturing experiment clamp holder which is combined with a clamp holder body 1, a fracturing pipe 2 is arranged in the clamp holder body 1, and the fracturing pipe 2 is connected with a plug 3;
a first channel 21 is arranged at the center of the fracturing pipe 2 along the axial direction of the fracturing pipe 2, a through hole 24 is arranged on the fracturing pipe 2 far away from the plug 3, and a groove 22 is arranged on the fracturing pipe 2 close to the plug 3;
the center of the plug 3 is provided with a second channel 33 along the axial direction of the plug 3, the end part of the plug 3 close to the fracturing pipe 2 side is provided with a first connecting hole 34, and the end part of the plug 3 far from the fracturing pipe 2 side is provided with a second connecting hole 31.
In this embodiment, the frac tube 2 is connected to the plug 3. The first channel 21 directs the fracturing fluid from the plug 3 to the interior of the core. The through holes 24 allow the fracturing fluid to be directionally contacted with the core, that is, the fracturing fluid forms impact along the constant direction of the core, so that the impact direction of the fracturing fluid on the core is controlled. And an O-shaped ring is added in the groove 22 to be matched with the plug 3, so that sealing is realized.
A second channel 33 directs the fracturing fluid from the intermediate container to the fracturing pipe 2. The first connection hole 34 is connected with the fracturing pipe 2 inserted into the core. The second connecting hole 31 is connected with a second adapter 13, and sealing of the fracturing fluid in the injection process is guaranteed.
The fracturing pipe 2 and the plug 3 are both made of polyether-ether-ketone materials, the polyether-ether-ketone materials can realize an acid fracturing experiment, and fracturing fluid with a low PH value does not have a corrosion effect on the fracturing pipe made of the polyether-ether-ketone materials, so that the cost is reduced.
The fracturing pipe 2 with the first channel 21, the through hole 24 and the groove 22 is combined with the plug with the second channel 33, the first connecting hole 34 and the second connecting hole 31, the clamp does not need to be opened, and therefore observation on later-stage CT equipment cannot be influenced. That is, the frac tube 2 and plug 3 may be CT scanned directly within the holder body 1. And the extraction of the core hydraulic fracturing fracture is more accurate.
An O-shaped ring is added at the groove 22 to ensure the sealing between the fracturing pipe 2 and the plug 3, and meanwhile, the assembly and the replacement of the plug 3 and the fracturing pipe 2 are simplified.
The fracturing pipe 2 is an irregular cylindrical pipe and does not need to be disassembled, so that the rock core does not need to be cut, and the rock core cannot be damaged secondarily.
According to another embodiment of the present invention, as shown in fig. 2, the end of the first channel 21 close to the choke plug 3 side is flush with the end of the fracturing pipe 2 close to the choke plug 3 side;
the end of the first channel 21 remote from the stopper 3 is located within the fracturing tube 2.
In this embodiment, one end of the first channel 21 is located in the fracturing pipe 2, and the other end of the first channel 21 is flush with the end of the fracturing pipe 2 close to the choke plug 3 side and is communicated with the second channel 33, and this structure further realizes guiding the fracturing fluid from the choke plug 3 to the inside of the core.
In another embodiment of the present invention, as shown in fig. 2, a protruding portion 23 is disposed at an end of the first channel 21 away from the plug 3, and the protruding portion 23 protrudes toward the side away from the plug 3;
the first channel 21 adjacent to the boss 23 is vertically connected to the through-hole 24.
In the present embodiment, when the fracturing fluid flows into the through holes 24, the inflow direction of the fracturing fluid is divided, and the splashing of the fracturing fluid is reduced.
In yet another embodiment of the present invention, as shown in fig. 2, the diameter of the fracturing pipe 2 near the through hole 24 side is smaller than the diameter of the fracturing pipe 2 near the groove 22 side.
In this embodiment, the outer surface of fracturing pipe 2 is irregularly shaped, need not to dismantle, consequently need not cut the rock core to can not lead to the rock core to receive secondary damage.
In another embodiment of the present invention, referring to fig. 1, 2 and 3, the first connection hole 34 is used for connecting the fracturing pipe 2, the end of the first connection hole 31 near the second connection hole 31 is connected to the second passage 33, and the second passage 33 is communicated with the first passage 21.
In this embodiment, the fracturing pipe 2 is inserted into the first connecting hole 34, so that the fracturing pipe 2 is connected with the plug 3, and the first channel 21 and the second channel 33 are communicated.
In another embodiment of the present invention, as shown in fig. 3, the second connection hole 31 includes a first connection portion 311, and the first connection portion 311 near the first connection hole 34 is connected to a second connection portion 312.
In the present embodiment, the first connection portion 311 and the second connection portion 312 further increase the surface area of the second connection hole 31, so as to further improve the sealing performance of the fracturing fluid during the injection process. On the other hand, the first connection portion 311 and the second connection portion 312 together achieve a stable connection between the second connection hole 31 and the second adapter 13.
In order to further enhance the stable connection between the plug 3 and the second adjusting snap 15, according to another embodiment of the present invention, as shown in fig. 1, a recess 32 is formed at the end of the plug 3 on the side of the second connecting hole 31.
According to another embodiment of the invention, the holder body 1 comprises a moving part which is horizontally connected with the fracturing pipe 2 and the plug 3 at the same time, the moving part, the fracturing pipe 2 and the plug 3 jointly form a central part, and the outer surface of the central part is connected with a clamping part.
According to another embodiment of the present invention, as shown in fig. 1, the moving part includes a rock storage 11 connected to the fracturing pipe 2 and the plug 3 at the same time, the rock storage 11 far from the fracturing pipe 2 is connected to a core plug 7 in the horizontal direction, the end of the core plug 7 far from the rock storage 11 is connected to a first adapter 4, and the second connection hole 31 is connected to a second adapter 13;
the end of the plug 3 remote from the rock storage 11 is also connected with a second adjusting press cap 15.
In the present invention, the core is placed in the core storage 11. The second adjusting pressing cap 15 is fixed with the end of the holder body 1, and meanwhile, fracturing fluid is prevented from seeping out of the end of the inlet end of the fracturing fluid after the rock core is broken.
The core plug 7 realizes the loading of the axial pressure of the core.
The plug 7 is movable and displaceable by adjustment of the first swivel joint 4.
When the core is broken, the pressure of the fracturing fluid and the confining pressure are balanced and then discharged along the channel in the first adapter 4.
According to another embodiment of the present invention, as shown in fig. 1, the clamping member includes a rubber sleeve 9 connected to the central member, and a cylinder 10 is connected to the surface of the rubber sleeve 9 away from the central member;
the end part of the cylinder 10 close to the first rotary joint 4 side is connected with a first adjusting press cap 6, the first adjusting press cap 6 far away from the cylinder 10 side is connected with a first press ring 5, and the first adjusting press cap 6 far away from the center piece side and the cylinder 10 are simultaneously connected with a first press cap 8;
the end of the cylinder 10 close to the second adapter 13 is connected with a second press ring 14, and the second press ring 14 and the cylinder 10 far away from the center are simultaneously connected with a second press cap 12.
In this embodiment, the fracturing fluid passes through second adapter 13, end cap 3 and fracturing pipe 2 and transmits the fracturing fluid from the middle container to the middle round hole of rock core in.
The middle of the holding piece consists of a rubber sleeve 9 and a cylinder 10, and high-pressure fluid is applied between the rubber sleeve 9 and the cylinder 10 to ensure that the rubber sleeve 9 wraps a rock core placed at a rock storage position 11, so that the loading of the confining pressure of the rock core is realized. The rubber sleeve 9 and the cylinder 10 are made of non-metal materials, and therefore the core is conveniently arranged inside the holder body 1 to directly perform CT scanning.
The fracturing pipe 2 and the plug 3 are convenient to disassemble and assemble.
The process of the hydraulic fracturing experiment is as follows:
firstly, loading axial pressure and confining pressure, carrying out CT scanning after the axial pressure and the confining pressure are stable, and storing an original CT image of a rock core.
The injection valve is then opened and fracturing fluid is injected into the core at a constant flow rate or constant pressure, while injection pressure-and time-profiles are recorded. When the pressure at the injection end is reduced instantly, the rock core is cracked, and the injection valve needs to be closed in time to avoid the waste of fracturing fluid.
Thirdly, the pressure of the fracturing fluid in the holder body can be gradually balanced with the confining pressure, and at the moment, the CT is opened for scanning and the fracturing fracture image of the rock core is stored.
Because CT scanning can be carried out without disassembling the holder body, the relation between the cracks and minerals can be observed aiming at the same section of the rock core.
As shown in fig. 5, in the core hydraulic fracturing fracture, a main body is composed of two main fractures with central symmetry, and a dense secondary microcrack network is formed around a core injection hole and the main fractures on the rock. The injection pressure and the confining pressure are balanced mutually after the core crack is formed, so that the holder cannot tightly hold the core, the secondary microcrack cannot be closed, and the condition of the expansion of the secondary microcrack of the core can be observed more favorably. Meanwhile, the core is not loaded in other modes in the process of CT scanning, so that the secondary microcrack growth process of the core meets the real fracturing condition.
The above description is not intended to limit the present invention, and it should be finally explained that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments. Those of ordinary skill in the art will understand that: it is to be understood that modifications may be made to the above-described arrangements in the embodiments or equivalents may be substituted for some of the features of the embodiments without departing from the spirit of the present invention.

Claims (4)

1. The clamp holder for the indoor hydraulic fracturing experiment comprises a clamp holder body and is characterized in that a fracturing pipe is arranged in the clamp holder body and connected with a plug;
a first channel is arranged in the center of the fracturing pipe along the axial direction of the fracturing pipe, a through hole is formed in the fracturing pipe far away from the plug side, and a groove is formed in the fracturing pipe close to the plug side;
a second channel is arranged in the center of the plug along the axial direction of the plug, a first connecting hole is formed in the end part of the plug close to the fracturing pipe side, and a second connecting hole is formed in the end part of the plug far away from the fracturing pipe side;
the end of the first channel near the plug side is flush with the end of the fracturing pipe near the plug side;
the end of the first channel distal to the plug side is located within the fracturing pipe;
the end part of the first channel far away from the plug side is provided with a convex part which is convex towards the plug side;
the first channel close to the bulge part is vertically connected with the through hole;
the diameter of the fracturing pipe close to the through hole side is smaller than that of the fracturing pipe close to the groove side;
the clamp holder body comprises a moving part which is horizontally connected with the fracturing pipe and the plug at the same time, the moving part, the fracturing pipe and the plug jointly form a central part, and the outer surface of the central part is connected with a clamping part;
the moving part comprises a rock storage part which is connected with the fracturing pipe and the plug at the same time, a core plug is connected to the rock storage part far away from the fracturing pipe in the horizontal direction, a first adapter is connected to the end part of the core plug far away from the rock storage part, and a second adapter is connected to the second connecting hole;
the end part of the plug, which is far away from the rock storage side, is also connected with a second adjusting press cap;
the clamping piece comprises a rubber sleeve connected with the central piece, and the surface of the rubber sleeve far away from the central piece side is connected with a cylinder;
the end part of the cylinder body close to the first adapter is connected with a first adjusting press cap, the first adjusting press cap far away from the cylinder body is connected with a first pressing ring, and the first adjusting press cap far away from the center piece and the cylinder body are simultaneously connected with a first press cap;
the end portion of the barrel body close to the second adapter is connected with a second pressing ring, the end portion of the barrel body far away from the center piece is connected with a second pressing ring and a second pressing cap.
2. The indoor hydraulic fracturing experiment holder according to claim 1, wherein the first connection hole is used for connecting the fracturing pipe, an end of the first connection hole near the second connection hole side is connected to the second channel, and the second channel is communicated with the first channel.
3. The clamp for the indoor hydraulic fracturing experiment as claimed in claim 1, wherein the second connecting hole comprises a first connecting portion, and a second connecting portion is connected to the first connecting portion near the first connecting hole side.
4. The holder for the indoor hydraulic fracturing experiment as claimed in claim 3, wherein the end of the plug on the second connecting hole side is provided with a recess.
CN202110630507.5A 2021-06-07 2021-06-07 Clamp holder for indoor hydraulic fracturing experiment Active CN113237742B (en)

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