NL2030932B1 - High-temperature and high-pressure direct shear fracture seepage coupling testing device for rock - Google Patents

High-temperature and high-pressure direct shear fracture seepage coupling testing device for rock Download PDF

Info

Publication number
NL2030932B1
NL2030932B1 NL2030932A NL2030932A NL2030932B1 NL 2030932 B1 NL2030932 B1 NL 2030932B1 NL 2030932 A NL2030932 A NL 2030932A NL 2030932 A NL2030932 A NL 2030932A NL 2030932 B1 NL2030932 B1 NL 2030932B1
Authority
NL
Netherlands
Prior art keywords
test sample
rock test
pressure
seepage
rock
Prior art date
Application number
NL2030932A
Other languages
Dutch (nl)
Inventor
Hao Liang
Li Hang
Feng Tao
Feng Xiating
Liu Binhui
Xu Jianyu
Liu Zaobao
Wu Ming
Original Assignee
Univ Northeastern
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Univ Northeastern filed Critical Univ Northeastern
Priority to NL2030932A priority Critical patent/NL2030932B1/en
Application granted granted Critical
Publication of NL2030932B1 publication Critical patent/NL2030932B1/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
    • G01N15/0806—Details, e.g. sample holders, mounting samples for testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
    • G01N15/082—Investigating permeability by forcing a fluid through a sample
    • 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
    • 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
    • G01N3/18—Performing tests at high or low temperatures
    • 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
    • G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
    • 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
    • G01N2203/025—Geometry of the test
    • G01N2203/0256—Triaxial, i.e. the forces being applied along three normal axes of the specimen

Landscapes

  • Chemical & Material Sciences (AREA)
  • Biochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Dispersion Chemistry (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)

Abstract

The present disclosure relates to a high—temperature and high— pressure direct shear fracture seepage coupling testing device for rock. Two first pressure heads and two pressure subassemblies are arranged above and below the rock test sample in a manner of being symmetric about a center of a rock test sample. Two second pressure heads are arranged on the left and right of the rock test sample in a manner of being symmetric about the center of the rock test sample. By combining a triaXial testing machine, the testing machine can carry out a true triaXial direct shear fracture seepage test on the rock test sample under high-temperature and high—pressure conditions, and has relatively high practicability and reliability.

Description

P1105/NLpd
HIGH-TEMPERATURE AND HIGH-PRESSURE DIRECT SHEAR FRACTURE SEEPAGE
COUPLING TESTING DEVICE FOR ROCK
TECHNICAL FIELD
The present disclosure relates to the technical field of rock experiments, in particular to a high-temperature and high-pressure direct shear fracture seepage coupling testing device for rock.
BACKGROUND ART
At present, for studies on the permeability of a fluid medium that flows into rock fractures, in most cases, an intact rock test sample is subjected to a true triaxial direct shear seepage test under a high-temperature condition, so that test results will be more reasonable and accurate. In the patent documentation No.
CN108152149B, a full-rigid triaxial testing machine is used for carrying out a true triaxial direct shear test on rock. However, there is no temperature field and seepage field. A high- temperature and high-permeation-pressure environment required by the test cannot be satisfied.
SUMMARY
In view of the above defects in the prior art, the present disclosure provides a high-temperature and high-pressure direct shear fracture seepage coupling testing device for rock, including two first pressure heads and two pressure subassemblies; the two first pressure heads and the two pressure subassemblies are re- spectively arranged on upper and lower sides of the rock test sam- ple in a manner of being symmetric about a center of a rock test sample; the device further includes two second pressure heads; the two second pressure heads are arranged on left and right sides of the rock test sample in a manner of being symmetric about the cen- ter of the rock test sample; the first pressure head is an integrated member and includes a first pressure head main body; one end of the first pressure head main body close to the rock test sample is provided with a groove part that is sunken inwards; the groove part is opened to- wards the rock test sample;
the pressure subassembly includes a rubber capsule and a base plate; the rubber capsule and the base plate are accommodated in the groove part and are disposed in sequence along a depth direc- tion of the groove part; the rubber capsule is of a cavity struc- ture and is attached to a bottom wall of the groove part; one end of the base plate is attached to the rock test sample, and the other end of the base plate is attached to each rubber capsule;
an end surface of the first pressure head main body close to the rock test sample is flush with an end surface of the base plate close to the rock test sample and is attached to the rock test sample;
the first pressure head main body is provided with a first hydraulic oil channel and a seepage channel;
a cavity of the rubber capsule is communicated with the first hydraulic oil channel; the first hydraulic oil channel is used for injecting hydraulic oil into the rubber capsule; the rubber cap-
sule applies a pressure to the rock test sample through the base plate;
the end surface of the first pressure head main body close to the rock test sample is provided with a first seepage network groove; the end surface of the base plate close to the rock test sample is provided with a second seepage network groove;
the seepage channel, the first seepage network groove, and the second seepage network groove are communicated with one anoth- er; seepage media in the first seepage network groove and the sec- ond seepage network groove are used for applying an osmotic pres-
sure to the rock test sample;
the triaxial testing machine applies a lateral confining pressure to forward and backward directions of the rock test sam- ple through the hydraulic oil, applies an axial pressure to upper and lower directions of the rock test sample through the first pressure heads, applies an axial pressure to left and right direc- tions of the rock test sample through the second pressure heads, and provides a high-temperature environment for the rock test sam-
ple.
Compared to the prior art, the "two-rigid one-flexible" tri- axial testing machine of the present disclosure can carry out a true triaxial unidirectional direct shear fracture seepage cou- pling test on the rock test sample under high-temperature, high- stress, high-osmotic-pressure compound conditions, so as to accu- rately acquire the shear strength of the rock test sample under a true triaxial stress and changes in the fracture permeability be- fore and after a shear failure. This provides a theoretical basis for revealing the evolution and catastrophic mechanism of engi- neering rock mass performance under a pressure occurrence environ- ment of a deep high-temperature, high-stress and high-seepage me- dium.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an exploded diagram illustrating that a groove part of the present disclosure is arranged along a lengthwise direction of a first pressure head main body;
FIG. 2 is a schematic exploded diagram illustrating that a groove part of the present disclosure is arranged along a width direction of a first pressure head main body;
FIG. 3 is an assembly diagram of FIG. 1;
FIG. 4 is a three-dimensional schematic diagram of the first pressure head in FIG. 1;
FIG. 5 is a three-dimensional schematic diagram of the first pressure head in FIG. 1 from another view;
FIG. 6 is a schematic position diagram of the groove part of the first pressure head in FIG. 1;
FIG. 7 is a top view of the first pressure head in FIG. 1;
FIG. 8 is an assembly diagram of a piston component and a rubber capsule in FIG. 1;
FIG. 9 is an exploded diagram of FIG. 8;
FIG. 10 is a top view of a base plate in FIG. 1; and
FIG. 11 is pipetting subassembly of the present disclosure.
DETAILED DESCRIPTION OF THE EMBODIMENTS
Referring to FIG. 1 to FIG. 3, the present disclosure pro-
vides a high-temperature and high-pressure direct shear fracture seepage coupling testing device for rock, including two first pressure heads 1, two second pressure heads 2, two pressure subas- semblies 3, and a pipetting subassembly 4. The two first pressure heads 1 and the two pressure subassemblies 3 are respectively ar- ranged on upper and lower sides of the rock test sample 6 in a manner of being symmetric about a center of a rock test sample 6.
The two second pressure heads 2 are arranged on left and right sides of the rock test sample 6 in a manner of being symmetric about the center of the rock test sample 6. The pipetting subas- sembly 4 is used for injecting hydraulic oil to the first pressure heads 1 and the pressure subassemblies 3.
The first pressure heads 1, the second pressure heads 2, the pressure subassemblies 3, and the rock test sample 6 are assembled and are together put into a pressure bin of a triaxial testing ma- chine. The first pressure heads 1 and the pressure subassemblies 3 are used for applying an osmotic pressure to upper and lower di- rections of the rock test sample 6, and the pressure subassemblies 3 are also used for applying a pressure to the upper and lower di- rections of the rock test sample 6. The triaxial testing machine applies a lateral confining pressure to forward and backward di- rections of the rock test sample 6 through the hydraulic oil, ap- plies an axial pressure to the upper and lower directions of the rock test sample 6 through the first pressure heads 1, and applies an axial pressure to left and right directions of the rock test sample 6 through the second pressure heads 2. The triaxial testing machine can also provide a high-temperature environment for the rock test sample 6. The rock test sample 6 is a cube.
Referring to FIG. 4 and FIG. 5, the first pressure head 1 is an integrated member, and includes a first pressure head main body 11 and a first extending part 12. The first extending part 12 ex- tends outwards from a side surface of one side of the first pres- sure head main body 11 along a plane direction perpendicular to a height direction of the first pressure head 1. The first extending part 12 is provided with a first extending part threaded hole 121, and the first extending part threaded hole 121 penetrates through the first extending part 12 along the height direction of the first pressure head 1. A side surface of the first pressure head main body 11 opposite to the first extending part 12 is perpendic- ular to an end surface of an end of the first pressure head main body 11 close to the rock test sample 6, and this side surface is 5 provided with a first pressure head main body threaded hole 116.
Referring to FIG. 1 to FIG. 3, the first pressure head 2 is an integrated member, and includes a second pressure head main body 21 and a second extending part 22. The second extending part 22 extends outwards from a side surface of one side of the second pressure head main body 21 along a plane direction perpendicular to a height direction of the second pressure head 2. The second extending part 22 is provided with a second extending part thread- ed hole 221, and the second extending part threaded hole 221 pene- trates through the second extending part 22 along the height di- rection of the second pressure head 2. A side surface of the sec- ond pressure head main body 21 opposite to the second extending part 22 is perpendicular to an end surface of an end of the second pressure head main body 21 close to the rock test sample 6, and this side surface is provided with a second pressure head main body threaded hole 211.
A length of the end surface of the end of the second pressure head main body 21 close to the rock test sample 6 is greater than a sum of an edge length of the rock test sample 6 and a depth of a groove part 117. A length of the second pressure head main body 21 is greater than the sum of the edge length of the rock test sample 6 and the depth of the groove part 117 by 10 mm or more.
Referring to FIG. 1 to FIG. 3, when the two first pressure heads 1 and the two second pressure heads 2 are respectively ar- ranged around the rock test sample 6 in a manner of being symmet- ric about a center of the rock test sample 6, the adjacent first pressure head 1 and second pressure head 2 are in threaded fixed connection with each other by means of mutual cooperation between the first extending part threaded hole 121 and the second pressure head main body threaded hole 211 or mutual cooperation between the first pressure head main body threaded hole 116 and the second ex- tending part threaded hole 221.
Referring to FIG. 3, an end surface of an end of the first extending part 12 close to the rock test sample 6 is higher than the end surface of the end of the first pressure head main body 11 close to the rock test sample 6, so that a plug block 7is arranged between the first extending part 12 and the second pressure head main body 21. Similarly, an end surface of an end of the second extending part 22 close to the rock test sample 6 is higher than the end surface of the end of the second pressure head main body 21 close to the rock test sample 6, so that a plug block 7 is ar- ranged between the second extending part 22 and the first pressure head main body 11.
A first hydraulic oil channel 111, a piston hole 112, a seep- age medium sealing structure 113, a seepage channel 114, a first seepage network groove 115, and the groove part 117 are arranged on the first pressure head main body 11.
Referring to FIG. 4 and FIG. 5, the end of the first pressure head main body 11 close to the rock test sample 6 is inwards sunk- en to form the groove part 117, and the groove part 117 is opened towards the rock test sample 6.
Referring to FIG. 6, the groove part 117 is a cuboid. The groove part 117 may extend along a lengthwise or width direction of the first pressure head main body 11. When the groove part 117 extends along the width direction of the first pressure head main body 11, the groove part 117 is located on one side close to the first extending part 12.
Referring to FIG. 1 to FIG. 3, specifically, a length of a relatively long edge of the bottom of the groove part 117 is greater than the edge length of the rock test sample 6, and a length of a relatively short edge of the bottom of the groove part 117 is consistent with 1/2 of the edge length of the rock test sample 6. The length of the relatively long edge of the bottom of the groove part 117 is preferably greater than the edge length of the rock test sample 6 by at least 5 mm, which avoids a test fail- ure caused by the fact that the rock test sample 6 abuts against the end surface of the end of the first pressure head main body 11 close to the rock test sample 6.
The first seepage network groove 115 is arranged on the end surface of the first pressure head main body 11 close to the rock test sample 6. Along a flowing direction of the hydraulic oil, the first hydraulic oil channel 111, the piston hole 112, the seepage medium sealing structure 113, and the groove part 117 are communi- cated with one another. Along a flowing direction of a seepage me- dium, the seepage channel 114 and the first seepage network groove 115 are communicated in sequence.
The first hydraulic oil channel 111 is used for injecting the hydraulic oil. The first hydraulic oil channel 111 includes a first hydraulic oil channel horizontal section 1111 and a first hydraulic oil channel vertical section 1112 in sequence. The first hydraulic oil channel horizontal section 1111 and the first hy- draulic oil channel vertical section 1112 are cylindrical holes, and a junction between the first hydraulic oil channel horizontal section 1111 and the first hydraulic oil channel vertical section 1112 is in arc transition.
The seepage medium sealing structure 113 is used for sealing the seepage medium. The seepage medium sealing structure 113 in- cludes a first sealing hole 1131, a second sealing hole 1132, and a spring seal 1133 arranged in the second sealing hole 1132. The first sealing hole 1131 and the second sealing hole 1132 are com- municated with each other to form a step.
Along the flowing direction of the hydraulic oil, the first hydraulic oil channel 111, the piston hole 112, the first sealing hole 1131, the second sealing hole 1132, and the groove part 117 are communicated with one another.
An open end of the spring seal 1133 faces the rock test sam- ple 6 to seal the seepage medium. The spring seal 1133 can further prevent fragments produced by a shear failure of the rock test sample 6 from affecting sealing.
The seepage channel 114 is used for injecting the seepage me- dium. The seepage channel 114 includes a seepage channel horizon- tal section 1141, a seepage channel vertical section 1142, and a seepage channel accommodating section 1143 which are communicated with one another. The seepage channel horizontal section 1141 is located at an end of the first pressure head main body 11 away from the rock test sample 6, and the seepage channel accommodating section 1143 is located at the end of the first pressure head main body 11 close to the rock test sample 6.
The seepage channel horizontal section 1141 is communicated with a seepage pipe 5, and the seepage pipe 5 is used for inject- ing the seepage medium into the seepage channel 114. The seepage channel vertical section 1142 and the seepage channel accommodat- ing section 1143 are cylindrical holes, and an inner diameter of the seepage channel vertical section 1142 is less than that of the seepage channel accommodating section 1143. A filter layer is ar- ranged in the seepage channel accommodating section 1143 to avoid blockage of the seepage channel 114 caused by the fragments pro- duced by the shear failure of the rock test sample 6.
Referring to FIG. 7, the first seepage network groove 115 is arranged on the end surface of the first pressure head main body 11 close to the rock test sample 6. Along the flowing direction of the seepage medium, the seepage channel accommodating section 1143 of the seepage channel 114 is communicated with the first seepage network groove 115.
Along the flowing direction of the seepage medium, the first seepage network groove 115 includes a first seepage hole 1151 and multiple rows and columns of first grooves 1152 which are communi- cated with each other. The multiple rows and columns of first grooves 1152 are arranged around the first seepage hole 1151.
Each row of grooves and each column of grooves in the multi- ple rows and columns of first grooves 1152 have widths of 1 mm and depths of 1 mm, A distance between the outermost groove of the multiple rows and columns of first grooves 1152 and the side sur- face of the first pressure head main body 11 is 3 mm.
A plurality of filter layers are arranged between the first seepage network groove 115 and the rock test sample & to avoid blockage of the first seepage network groove 115 caused by the fragments produced by the shear failure of the rock test sample 6.
The filter layer is filter paper or microporous metal mesh.
Referring to FIG. 1 and FIG. 2, the pressure subassembly 3 includes a piston component 31 used for transmitting the hydraulic oil, a rubber capsule 32 used for accommodating the hydraulic oil, and a base plate 33 used for applying a pressure to the rock test sample 6. The piston component 31 is plugged into the piston hole
112 of the first pressure head main body 11. The rubber capsule 32 and the base plate 33 are accommodated in the groove part 117 and are disposed in sequence along the depth direction of the groove part 117.
Referring to FIG. 8 and FIG. 9, the piston component 31 in- cludes a piston rod 311, a hydraulic oil sealing structure, and a piston plate 312. The hydraulic oil sealing structure is arranged at an end of the piston rod 311 away from the rock test sample 6.
The piston plate 312 is arranged at an end of the piston rod 311 close to the rock test sample 6 in a manner of surrounding a pe- ripheral side wall of the piston rod 311. A cross section of the piston plate 312 is rectangular.
The piston rod 311 is a cylinder. The piton rod 311 is accom- modated in a space formed by the piston hole 112, the first seal- ing hole 1131, and the second sealing hole 1132, and an end sur- face of the end of the piston rod 311 away from the rock test sam- ple 6 abuts against the bottom wall of the piston hole 112.
The hydraulic oil sealing structure includes a ring groove 3111, a sealing ring 3112, and a retainer ring 3113. The ring groove 3111 is inwards sunken from the peripheral side wall of the piston rod 311. The sealing ring 3112 and the retainer ring 3113 are arranged in the ring groove 3111. The sealing ring 3112 and the retainer ring 3113 are used for sealing the hydraulic oil.
The sealing ring 3112 is an O-shaped ring. The retainer ring 3113 is an arc-shaped retainer ring to adapt to a high-pressure environment. A material of the sealing ring 3112 and the retainer ring 3113 is fluorelastomer, silica gel, or polytetrafluoroeth- ylene, so as to adapt to a 250 °C high-temperature environment and a high-pressure environment.
By means of the cooperation between the hydraulic oil sealing structure and the seepage medium sealing structure 113, separate sealing for the hydraulic oil at an end in the piston hole 112 away from the rock test sample 6 and the seepage medium at an end close to the rock test sample 6 is achieved, which avoids mixing of the hydraulic oil and the seepage medium.
A second hydraulic oil channel 313 penetrating through the piston rod 311 is arranged on the piston component 31. One end of the second hydraulic oil channel 313 is communicated with the first hydraulic oil channel 111, and the other end is communicated with the cavity of the rubber capsule 32. Preferably, the second hydraulic oil channel 313 and the first hydraulic oil channel ver- tical section 1112 are coaxial and have the same inner diameters.
Referring to FIG. 8 and FIG. 9, the rubber capsule 32 is a cuboid with a cavity. An end of the rubber capsule 32 away from the rock test sample 6 abuts against the bottom of the groove part 117. The end wall of the end of the rubber capsule 32 away from the rock test sample 6 is provided with a rubber capsule hole 321.
An inner diameter of the rubber capsule hole 321 is consistent with an outer diameter of the piston rod 311. The rubber capsule hole 321 and the piston rod 311 are coaxial. The piston rod 311 is plugged into the rubber capsule hole 321.
The piston plate 312 is located inside the rubber capsule 32.
An end surface of an end of the piston plate 312 away from the rock test sample 6 is fixed on the inner side of the end wall of the end of the rubber capsule 32 away from the rock test sample 6.
The piston plate 312 and the rubber capsule 32 are preferably fix- edly connected in an adhered manner.
The connection way that the piston plate 312 is fixed at the end of the rubber capsule 32 away from the rock test sample 6 en- larges a stress area between them and avoids damage to a junction between the piston plate 312 and the rubber capsule 32 when the pressure subassembly 3 is removed from the first pressure head 1, thus improving the use intensities and service lives of the piston plate 312 and the rubber capsule 32.
The rubber capsule 32 preferably adopts a high-temperature- resistant rubber material such as silica gel.
Referring to FIG. 1 to FIG. 3, further, the base plate 33 is a cuboid. The base plate 33 is located between the rubber capsule 32 and the rock test sample 6. One end of the base plate 33 is at- tached to the rock test sample 6, and the other end is attached to the end of the rubber capsule 32 close to the rock test sample 6.
An end surface of the end of the base plate 33 close to the rock test sample 6 is flush with the end surface of the end of the first pressure head main body 11 close to the rock test sample 6.
Referring to FIG. 10, the end surface of the base plate 33 close to the rock test sample 6 is provided with a second seepage network groove 331. Along a flowing direction of a seepage medium, the first seepage network groove 115 and the second seepage net- work groove 331 are communicated.
The second seepage network groove 331 includes multiple rows and columns of grooves communicated with one another.
Each row of grooves and each column of grooves in the second multi-row multi-column groove 331 have widths of 1 mm and depths of 1 mm. A distance between the outermost groove of the second seepage network grooves 331 and the side surface of the base plate 33 is 3 mm.
A plurality of filter layers are arranged between the second seepage network groove 331 and the rock test sample 6 to avoid blockage of the second seepage network groove 331 caused by the fragments produced by the shear failure of the rock test sample &.
The filter layer is filter paper or microporous metal mesh.
By means of providing the seepage medium sealing structure 113, namely providing the first sealing hole 1131 and the second sealing hole 1132 on the first pressure head 1, the inner diameter of the first sealing hole 1131 is greater than that of the piston hole 112 and that of the second sealing hole 1132. The spring seal 1133 is arranged in the first sealing hole 1131 to form an inte- grated sealing structure. Compared with an existing split sealing structure, the integrated sealing structure has a simple struc- ture. Compared with an equal-diameter sealing structure in which the first sealing hole 1131 and the second sealing hole 1132 have consistent inner diameters, this structure is more conductive to mounting and dismounting the spring seal 1133. On the basis of the integrated sealing structure, the setting height of the first pressure head 1 is also reduced. The inner diameter of the second sealing hole 1132 is set to be suitable for mounting and dismount- ing the spring seal 1133. By means of providing the spring seal 1133, sealing for the seepage medium is achieved, and at the same time, the influence of the fragments produced by the shear failure of the rock test sample 6 on the airtightness is avoided, so that the number of sealing members for different purposes is reduced,
and the height of the first pressure head 1 is reduced. By means of the connection way of fixing the piston plate 312 at the end of the rubber capsule 32 away from the rock test sample 6, the con- nection strength between the piston component 31 and the rubber capsule 32 can be ensured, and the setting depth of the groove part 117 can also be reduced, thus reducing the height of the first pressure head 1. In this embodiment, the setting height of the first pressure head 1 is reduced, so that the conventional high-temperature and high-pressure triaxial direct shear fracture seepage coupling testing device is applicable to a narrow pressure bin of a high-temperature and high-pressure triaxial testing ma- chine.
Referring to FIG. 11, the pipetting subassembly 4 is used for injecting hydraulic oil into the first hydraulic oil channel 111.
The pipetting subassembly 4 includes an injector 41 and a long- tail dropper 42 communicated with the injector 41. The long-tail dropper 42 can extend into the first hydraulic oil channel hori- zontal section 1111, the first hydraulic oil channel vertical sec- tion 1112, and the second hydraulic oil channel 313 and enter the cavity of the rubber capsule 32. The injector 41 injects the hy- draulic oil into the rubber capsule 32 through the long-tail drop- per 42. Air in the cavity is discharged to the outside while the hydraulic oil is injected into the rubber capsule 32. The junction between the first hydraulic oil channel horizontal section 1111 and the first hydraulic oil channel vertical section 1112 are in arc transition, which is convenient for the extension of the long- tail dropper 42.

Claims (1)

CONCLUSIESCONCLUSIONS 1. Kwelkoppeling testapparaat voor directe afschuifbreuk bij hoge temperatuur en hoge druk voor gesteente, omvattende twee eerste drukkoppen en twee druksubsamenstellen, waarbij de twee eerste drukkoppen en de twee druksubsamenstellen respectievelijk zijn aangebracht aan de boven- en onderkant van het gesteente testmon- ster op een manier die symmetrisch is rond een midden van een ge- steente testmonster; waarbij de inrichting verder omvat twee tweede drukkoppen; waarbij de twee tweede drukkoppen zijn aangebracht aan de linker- en rech- terkant van het gesteente-testmonster op een manier dat ze symme- trisch zijn rond het midden van het gesteente-testmonster; waarbij de eerste drukkop een geïntegreerd onderdeel is en een hoofdlichaam van een eerste drukkop omvat; waarbij een uiteinde van het eerste hoofdlichaam van de drukkop dicht bij het gesteente testmonster is voorzien van een groefdeel dat naar binnen is ver- zonken; waarbij het groefgedeelte geopend is in de richting van het gesteente testmonster; waarbij het druksubsamenstel een rubberen capsule en een basis- plaat omvat; waarbij de rubberen capsule en de basisplaat zijn op- genomen in het groefdeel en achtereenvolgens zijn opgesteld langs een diepterichting van het groefdeel; waarbij de rubberen capsule een holtestructuur heeft en is bevestigd aan een bodemwand van het groefdeel; waarbij het ene uiteinde van de grondplaat is bevestigd aan het gesteente testmonster en het andere uiteinde van de grond- plaat is bevestigd aan elke rubberen capsule; waarbij een eindoppervlak van het eerste hoofdlichaam met drukkop dicht bij het gesteente-testmonster gelijk ligt aan een eindopper- vlak van de basisplaat dichtbij het gesteente-testmonster en is bevestigd aan het gesteente-testmonster; waarbij het eerste hoofdlichaam met drukkop is voorzien van een eerste hydraulisch oliekanaal en een kwelkanaal; waarbij een holte van de rubberen capsule in verbinding staat met het eerste hydraulische oliekanaal; waarbij het eerste hydrauli- sche oliekanaal wordt gebruikt voor het injecteren van hydrauli-1. High temperature, high pressure direct shear fracture test apparatus for rock, comprising two first pressure heads and two pressure sub-assemblies, the two first pressure heads and the two pressure sub-assemblies being respectively mounted at the top and bottom of the rock test specimen on a manner that is symmetrical about a center of a rock test sample; wherein the device further comprises two second print heads; wherein the two second pressure heads are arranged on the left and right sides of the rock test sample in a manner that they are symmetrical about the center of the rock test sample; wherein the first printhead is an integrated part and includes a first printhead main body; wherein an end of the first main body of the print head close to the rock test sample is provided with a groove portion recessed inwardly; wherein the groove portion is open towards the rock test sample; wherein the pressure subassembly comprises a rubber capsule and a base plate; wherein the rubber capsule and the base plate are received in the groove part and are successively arranged along a depth direction of the groove part; wherein the rubber capsule has a cavity structure and is attached to a bottom wall of the groove part; wherein one end of the base plate is attached to the rock test sample and the other end of the base plate is attached to each rubber capsule; wherein an end surface of the first main body with pressure head close to the rock test sample is flush with an end surface of the base plate close to the rock test sample and attached to the rock test sample; wherein the first main body with pressure head is provided with a first hydraulic oil channel and a seepage channel; wherein a cavity of the rubber capsule communicates with the first hydraulic oil channel; wherein the first hydraulic oil channel is used for injecting hydraulic sche olie in de rubberen capsule; waarbij de rubberen capsule druk uitoefent op het gesteentetestmonster via de basisplaat;sche oil in the rubber capsule; wherein the rubber capsule applies pressure to the rock test sample through the base plate; waarbij het eindoppervlak van het eerste hoofdlichaam met de druk-wherein the end surface of the first main body with the pressure kop dichtbij het gesteente testmonster is voorzien van een eerste lekkagenetwerkgroef; waarbij het eindoppervlak van de basisplaat dichtbij het gesteentetestmonster is voorzien van een tweede kwel-head close to the rock test sample is provided with a first leakage network groove; wherein the end surface of the base plate close to the rock test sample is provided with a second seepage netwerkgroef;network groove; waarbij het kwelkanaal, de eerste kwelnetwerkgroef en de tweede kwelnetwerkgroef met elkaar worden gecommuniceerd; waarbij kwelme-wherein the seepage channel, the first seepage network groove and the second seepage network groove are communicated with each other; where seepage dia in de eerste kwelnetwerkgroef en de tweede kwelnetwerkgroef worden gebruikt voor het uitoefenen van een osmotische druk op het gesteentetestmonster; waarbij de triaxiale testmachine een laterale beperkende druk uit- oefent in voorwaartse en achterwaartse richtingen van het ge-slide in the first seepage network groove and the second seepage network groove are used to apply an osmotic pressure to the rock test sample; wherein the triaxial testing machine applies a lateral confining pressure in the forward and backward directions of the steentetestmonster door de hydraulische olie, een axiale druk uit- oefent in de bovenste en onderste richtingen van het gesteente- testmonster via de eerste drukkoppen, een axiale druk uitoefent naar linker en rechter richtingen van het rotstestmonster door de tweede drukkoppen, en zorgt voor een omgeving met hoge tempera-rock test specimen through the hydraulic oil, exerts an axial pressure towards the upper and lower directions of the rock test specimen through the first pressure heads, exerts an axial pressure towards left and right directions of the rock test specimen through the second pressure heads, and provides an environment with high temperature turen voor het rotstestmonster.squint for the rock test sample.
NL2030932A 2022-02-14 2022-02-14 High-temperature and high-pressure direct shear fracture seepage coupling testing device for rock NL2030932B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL2030932A NL2030932B1 (en) 2022-02-14 2022-02-14 High-temperature and high-pressure direct shear fracture seepage coupling testing device for rock

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2030932A NL2030932B1 (en) 2022-02-14 2022-02-14 High-temperature and high-pressure direct shear fracture seepage coupling testing device for rock

Publications (1)

Publication Number Publication Date
NL2030932B1 true NL2030932B1 (en) 2023-08-18

Family

ID=87886976

Family Applications (1)

Application Number Title Priority Date Filing Date
NL2030932A NL2030932B1 (en) 2022-02-14 2022-02-14 High-temperature and high-pressure direct shear fracture seepage coupling testing device for rock

Country Status (1)

Country Link
NL (1) NL2030932B1 (en)

Similar Documents

Publication Publication Date Title
US4848145A (en) In-situ linear flow proppant conductivity test cell
EP2027365B1 (en) Measurement while drilling tool with interconnect assembly
US4599891A (en) TCH--tri-axial core holder
EP0620893B1 (en) Formation testing and sampling method and apparatus
CN113295552B (en) High-temperature high-pressure true triaxial direct shear fracture seepage coupling test device and use method
US5473939A (en) Method and apparatus for pressure, volume, and temperature measurement and characterization of subsurface formations
CA2147027C (en) Method and apparatus for acquiring and processing subsurface samples of connate fluid
US10738607B2 (en) Downhole formation testing and sampling apparatus having a deployment linkage assembly
CN113109181B (en) High-temperature high-pressure conventional triaxial direct shear fracture seepage coupling test device and use method thereof
US8950484B2 (en) Formation tester tool assembly and method of use
CN110542614A (en) True triaxial experiment device and method with CT real-time scanning based on water seepage
NL2030932B1 (en) High-temperature and high-pressure direct shear fracture seepage coupling testing device for rock
AU2009346365B2 (en) Formation tester pad
US4383436A (en) Pipe tester
CN116087434B (en) Testing device and testing method
CA3031997C (en) Compact lubricator and header system
CN105092108B (en) The test wrapper of radial direction contact stress inside and outside a kind of measurable packing element
CN1028049C (en) Sampling tool for obtaining samples of fluids present in well
CN110306932B (en) Local compaction pressurizing compression mechanism for rock debris
CN110687032A (en) Mud dynamic pollution experiment system
US4082002A (en) Gauge flange
CN111720084A (en) Horizontal well is shunted linkage for coring
CN114396249B (en) Coal stratum hydraulic fracturing pressure monitoring device, effect evaluation and fault analysis method
CN210829214U (en) Push-pull switch assembly capable of eliminating system flexibility
CN212508173U (en) Horizontal well is reposition of redundant personnel linkage for airtight coring