CN109296364B - Method and device for improving accuracy of engineering geological investigation pressurized water test - Google Patents
Method and device for improving accuracy of engineering geological investigation pressurized water test Download PDFInfo
- Publication number
- CN109296364B CN109296364B CN201811192057.0A CN201811192057A CN109296364B CN 109296364 B CN109296364 B CN 109296364B CN 201811192057 A CN201811192057 A CN 201811192057A CN 109296364 B CN109296364 B CN 109296364B
- Authority
- CN
- China
- Prior art keywords
- water
- test
- pressure
- test box
- hydraulic
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 141
- 238000012360 testing method Methods 0.000 title claims abstract description 105
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000011835 investigation Methods 0.000 title abstract description 11
- 238000007906 compression Methods 0.000 claims abstract description 24
- 230000006835 compression Effects 0.000 claims abstract description 23
- 239000003381 stabilizer Substances 0.000 claims abstract description 11
- 230000003204 osmotic effect Effects 0.000 claims abstract description 4
- 230000002706 hydrostatic effect Effects 0.000 claims description 10
- 238000000746 purification Methods 0.000 claims description 8
- 230000035699 permeability Effects 0.000 claims description 5
- 230000008595 infiltration Effects 0.000 claims description 4
- 238000001764 infiltration Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 2
- 230000035515 penetration Effects 0.000 claims 1
- 239000008213 purified water Substances 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000011435 rock Substances 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/008—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by injection test; by analysing pressure variations in an injection or production test, e.g. for estimating the skin factor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a method for improving accuracy of a pressurized water test for engineering geological investigation, when water is pressed into a test hole to obtain data of the osmotic water quantity, the pressurized water pressure and the test section length, water flow output by a water pump is firstly transmitted to a hydraulic test box after passing through a central purified water front-mounted stabilizer, and then pressurized water is transmitted to the test hole through the hydraulic test box, so that accuracy of the test can be improved; meanwhile, a compression air bag and an air pressure sensor capable of testing the air pressure in the compression air bag are arranged in the hydraulic pressure test box, the water pressure in the hydraulic pressure test box is converted into air pressure through the compression air bag and the air pressure sensor to be reflected, and therefore obtained data are accurate. The invention has the advantages of simple structure and convenient use, and has the advantages of effectively eliminating the influence caused by water pressure fluctuation, ensuring higher accuracy of the data obtained by testing, effectively improving the testing efficiency, improving the stability of the testing work and the like.
Description
Technical Field
The invention relates to a method and a device for improving accuracy of a pressurized water test for engineering geological investigation, and belongs to the technical field of geological investigation equipment.
Background
The method is applied to the field pressurized water test of the river engineering, the pressurized water test is an in-situ test for calculating and knowing the development condition and the water permeability of a rock mass crack by using a high-pressure mode, the pressurized water test is an in-situ test for isolating a drilling test section with a certain length by using special water stopping equipment, then the pressurized water is injected into the rock mass by using water with a fixed water pressure to the section of the drilling pressurized water, the finally-injected water quantity tends to a stable value according to the pressurized water pressure, the length of the test section and the stable injected water quantity, and the strength of the rock mass can be determined. The existing water pressure testing device estimates the theoretical value of constant osmotic water flow by measuring the seepage flow in a non-constant state, the error deviation is larger, and meanwhile, the measurement process of the water pressure, the test section length and the stable seepage water quantity is complicated, and errors are easy to occur in the measurement process to influence the final data. Therefore, the existing engineering geological investigation pressurized water test mode is not ideal enough and cannot meet the actual use requirement.
Disclosure of Invention
The purpose of the invention is that: the method and the device for improving the accuracy of the pressurized water test of engineering geological survey are simple in structure, convenient to use and high in measurement accuracy, and the defects of the prior art are overcome.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the method for improving accuracy of engineering geological investigation pressurized water test comprises the steps of adopting the existing method for determining the water permeability of the geological structure of an investigation test by pressing water into the data of the acquired water permeability, pressurized water pressure and test section length in the test hole of the geological structure of investigation, inputting the water flow output by a water pump into a hydraulic test box after passing through a central purified water front stabilizer when the water pressure is pressed into the test hole to acquire the data of the water permeability, the pressurized water pressure and the test section length, and inputting the pressurized water into the test hole through the hydraulic test box, so that the water flow output by the water pump is changed from a non-constant state to a more constant state, the test result is closer to a theoretical value, the test error is reduced, and the accuracy of the test is improved; simultaneously, set up compression gasbag and the atmospheric pressure sensor that can test the gas pressure in the compression gasbag in the hydrostatic test box, convert the water pressure in the hydrostatic test box into atmospheric pressure through compression gasbag and atmospheric pressure sensor and reflect, so can make the more even reflection of water pressure initial value and the value after the infiltration on data to the data that makes the acquisition is more accurate.
The device for improving accuracy of a pressurized water test for engineering geological survey comprises a water pump and a mounting plate, wherein the water pump and the pressurized water test box with a pressure-resistant sealing cover are fixed on the mounting plate; the input end of the water pump is connected with a filter head for filtering inflow water through a pressure-resistant hose.
The hydraulic pressure test box is provided with a display screen for displaying data, a microprocessor for processing the data and a control panel, the signal output end of the air pressure sensor is connected with the microprocessor through a signal wire, the input ends of the electric push rod, the water pump, the photoelectric distance measuring instrument, the photoelectric receiver and the electromagnetic valve are respectively connected with a switch on the control panel, the input end of the switch is connected with the microprocessor through a wire, and the output end of the microprocessor is connected with the display screen.
The expansion range of the electric push rod in the envelope is sixty-eighty centimeters.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following beneficial effects:
1. the water flow is introduced into the hydrostatic test box for testing through the water pump, the pressure-resistant hose and the filter head, and is changed from a non-constant state to a more constant state by matching with the central water purification preposed voltage stabilizer, so that an experimental result is closer to a theoretical value, and errors are reduced;
2. by arranging the compression air bag and the water pressure pipe and matching with the electromagnetic valve, the water pressure is converted into air pressure reaction, so that the initial value of the water pressure and the value after permeation are more uniformly reflected on the data, and the obtained data are more accurate;
3. through being provided with photoelectric distance meter and photoelectric receiver, cooperation goes up pressure sensor and electric putter, can read the water pressure, test section length and stabilize infiltration water yield multiunit data, be convenient for calculate, can not cause great deviation in the measurement process, make the result more accurate.
Therefore, compared with the prior art, the invention not only has the advantages of simple structure and convenient use, but also has the advantages of effectively eliminating the influence caused by water pressure fluctuation, enabling the accuracy of the data obtained by the test to be higher, effectively improving the test efficiency, improving the stability of the test work and the like.
Drawings
FIG. 1 is a schematic view of the structure of the device of the present invention;
FIG. 2 is a schematic view of the internal structure of a water pressure test chamber in the device of the invention.
Reference numerals illustrate: 1-mounting plate, 2-hydrostatic test box, 3-display screen, 4-pressure-proof seal cover, 5-central water purification pre-stabilizer, 6-water pump, 7-pressure-proof hose, 8-filter head, 9-electric putter, 10-water jacket, 11-photoelectric receiver, 12-photoelectric distance meter, 13-solenoid valve, 14-air pressure sensor, 15-compression gasbag, 16-water pressure pipe, 17-envelope, 18-check valve.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples.
The invention relates to a method for improving accuracy of a pressurized water test for engineering geological investigation, which comprises the steps of adopting data of the water seepage quantity, the pressurized water pressure and the test section length obtained by pressing water into a test hole of a geological structure to be investigated to determine the water seepage quality of the geological structure to be investigated, and is characterized in that: when water is pressed into a test hole to obtain data of the osmotic water quantity, the water pressure of the water pressure and the length of a test section, the water flow output by the water pump passes through a central water purification front-mounted stabilizer and then is input into a hydraulic test box, and then the pressure water is input into the test hole through the hydraulic test box, so that the water flow output by the water pump is changed from a non-constant state to a more constant state, and an experimental result is closer to a theoretical value, thereby reducing the experimental error and improving the accuracy of the test; simultaneously, set up compression gasbag and the atmospheric pressure sensor that can test the gas pressure in the compression gasbag in the hydrostatic test box, convert the water pressure in the hydrostatic test box into atmospheric pressure through compression gasbag and atmospheric pressure sensor and reflect, so can make the more even reflection of water pressure initial value and the value after the infiltration on data to the data that makes the acquisition is more accurate.
The device for improving accuracy of engineering geological survey pressurized water test according to the present invention constructed by the above method and applied to the above method, as shown in fig. 1 and 2, comprises a water pump 6 and a mounting plate 1, a water pump 6 and a pressurized-water test tank 2 provided with a pressurized-water seal cover 4 are fixed on the mounting plate 1, a hydraulic pipe 16 and a compression balloon 15 are installed in an inner cavity of the pressurized-water test tank 2, the compression balloon 15 is installed in the inner cavity of the hydraulic pipe 16, a solenoid valve 13 capable of making the inner cavity of the hydraulic pipe 16 be communicated or cut off from the inner cavity of the pressurized-water test tank 2 is installed on the hydraulic pipe 16, a pneumatic sensor 14 capable of detecting the pneumatic pressure in the compression balloon 15 is connected on the compression balloon 15, an output end of the water pump 6 is connected with an input port of a central purified water pre-stabilizer 5 through a pipeline, the output port of the central water purification preposed voltage stabilizer 5 is communicated with the inner cavity of the hydrostatic test box 2 through a pipeline, an electric push rod 9 is arranged at the bottom of the mounting plate 1 and close to the lower part of the hydrostatic test box 2, the electric push rod 9 is of a hollow structure with an inner cavity, the inner cavity of the electric push rod 9 is communicated with the inner cavity of the hydrostatic test box 2, a hydraulic sleeve 10 capable of extruding water in the inner cavity of the electric push rod 9 is sleeved on a moving rod of the electric push rod 9, an envelope 17 capable of completely covering the electric push rod 9 is fixed at the bottom of the mounting plate 1, a one-way valve 18 is arranged at the bottom of the envelope 17, a photoelectric distance meter 12 is fixed at the top of the envelope 17, a photoelectric receiver 11 is fixed at the bottom of the hydraulic sleeve 10, and the photoelectric distance meter 12 is positioned right above the photoelectric receiver 11; the input end of the water pump 6 is connected with a filter head 8 for filtering the inlet water through a pressure-resistant hose 7; during manufacturing, the hydraulic pressure test box 2 is simultaneously provided with the display screen 3 for displaying data, the microprocessor for processing data and the control panel, the signal output end of the air pressure sensor 14 is connected with the microprocessor through a signal wire, the input ends of the electric push rod 9, the water pump 6, the photoelectric distance meter 12, the photoelectric receiver 11 and the electromagnetic valve 13 are respectively connected with the switch on the control panel in a conventional manner, the input ends of the switch are respectively connected with the microprocessor through wires according to the use requirement, and the output end of the microprocessor is connected with the display screen 3 in a conventional manner; when in manufacture, the expansion range of the electric push rod 9 in the envelope 17 is controlled to be within the range of sixty-eighty centimeters.
The components such as the central water purification front-end regulator 5, the air pressure sensor 14, the electric push rod 9, the electro-optical distance meter 12, the microprocessor and the like used in the embodiment can be directly finished products sold in the market, and the components of the finished products are preferably the components with the following types sold in the market: the model of the air pressure sensor 14 is JY-P300, the model of the electric push rod 9 is YNT-03, the model of the electro-optical distance meter 12 is SW-Q80, and the model of the microprocessor is ARM9TDMI.
The working principle of the invention is described as follows:
working principle: when the engineering geological investigation pressurized water test is carried out, the jacket 17 is inserted into the drilled test hole, the water pressure of a water source is converted into the hydraulic pressure test box 2 through the filter head 8 matched with the water pump 6 and the pressure-resistant hose 7, when the water is pressed into the hydraulic pressure test box 2, the pressed water flow is changed into a more constant state through the central purified water front stabilizer 5, then the water in the hydraulic pressure test box 2 is pressed into the jacket 17 through the hydraulic jacket 10, the water permeates into a test crack of the test hole through the one-way valve 18 at the bottom of the jacket 17, at the moment, the water in the hydraulic pressure test box 2 also enters into the hydraulic pressure pipe 16 through the electromagnetic valve 13, the compression air bag 15 is subjected to the same pressure as the water pressure in the hydraulic pressure test box 2, the hydraulic pressure is converted into the air pressure through the air pressure sensor 14 connected with the compression air bag 15, and thus the data of the pressurized water pressure, the test section length and the stable water quantity are respectively identified and displayed on the display screen 3 through the air pressure sensor 14, the photoelectric receiver 11 and the photoelectric distance meter 12.
Claims (4)
1. A method for improving accuracy of a pressurized water test for engineering geological survey, comprising determining water permeability of a geological structure for the survey by using data of a water penetration amount, a pressurized water pressure and a test section length obtained by pressing water into a test hole of the geological structure for the survey, characterized in that: when water is pressed into a test hole to obtain data of the osmotic water quantity, the water pressure of the water pressure and the length of a test section, the water flow output by the water pump passes through a central water purification front-mounted stabilizer and then is input into a hydraulic test box, and then the pressure water is input into the test hole through the hydraulic test box, so that the water flow output by the water pump is changed from a non-constant state to a more constant state, and an experimental result is closer to a theoretical value, thereby reducing the experimental error and improving the accuracy of the test; simultaneously, set up compression gasbag and the atmospheric pressure sensor that can test the gas pressure in the compression gasbag in the hydrostatic test box, convert the water pressure in the hydrostatic test box into atmospheric pressure through compression gasbag and atmospheric pressure sensor and reflect, so can make the more even reflection of water pressure initial value and the value after the infiltration on data to the data that makes the acquisition is more accurate.
2. The utility model provides a device for improving engineering geology reconnaissance pressurized water test degree of accuracy, includes water pump (6) and mounting panel (1), its characterized in that: the hydraulic pressure test box (2) with the pressure-resistant sealing cover (4) is fixed on the mounting plate (1), the hydraulic pressure pipe (16) and the compression air bag (15) are arranged in the inner cavity of the hydraulic pressure test box (2), the compression air bag (15) is arranged in the inner cavity of the hydraulic pressure test box (16), the electromagnetic valve (13) which can enable the inner cavity of the hydraulic pressure pipe (16) to be communicated or separated from the inner cavity of the hydraulic pressure test box (2) is arranged on the hydraulic pressure pipe (16), the air pressure sensor (14) which can detect the air pressure in the compression air bag (15) is connected on the compression air bag (15), the output end of the water pump (6) is connected with the input port of the central water purification front pressure stabilizer (5) through a pipeline, the output port of the central water purification front pressure stabilizer (5) is communicated with the inner cavity of the hydraulic pressure test box (2) through a pipeline, the electric push rod (9) is arranged below the mounting plate (1) and is in a hollow structure with the inner cavity, the inner cavity of the electric push rod (9) is communicated with the inner cavity of the hydraulic pressure test box (2), the electric push rod (9) can be pressed out of the inner cavity (9) through a sleeve, the electric push rod (9) can be sleeved on the electric push rod (9) and the bottom of the electric push rod (17) can be fixed in the water jacket (1), a one-way valve (18) is arranged at the bottom end of the envelope (17), an electro-optical distance meter (12) is fixed at the top of the envelope (17), a photoelectric receiver (11) is fixed at the bottom of the hydraulic pressure envelope (10), and the electro-optical distance meter (12) is positioned right above the photoelectric receiver (11); the input end of the water pump (6) is connected with a filter head (8) for filtering inflow water through a pressure-resistant hose (7).
3. The apparatus for improving accuracy of pressurized water test for engineering geological survey of claim 2, wherein: the hydraulic pressure test box (2) is provided with a display screen (3) for displaying data, a microprocessor for processing data and a control panel, the signal output end of the air pressure sensor (14) is connected with the microprocessor through a signal wire, the input ends of the electric push rod (9), the water pump (6), the photoelectric distance meter (12), the photoelectric receiver (11) and the electromagnetic valve (13) are respectively connected with a switch on the control panel, the input end of the switch is connected with the microprocessor through a wire, and the output end of the microprocessor is connected with the display screen (3).
4. The apparatus for improving accuracy of pressurized water test for engineering geological survey of claim 2, wherein: the expansion range of the electric push rod (9) in the envelope (17) is sixty-eighty centimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811192057.0A CN109296364B (en) | 2018-10-12 | 2018-10-12 | Method and device for improving accuracy of engineering geological investigation pressurized water test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811192057.0A CN109296364B (en) | 2018-10-12 | 2018-10-12 | Method and device for improving accuracy of engineering geological investigation pressurized water test |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109296364A CN109296364A (en) | 2019-02-01 |
| CN109296364B true CN109296364B (en) | 2023-05-02 |
Family
ID=65162554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811192057.0A Active CN109296364B (en) | 2018-10-12 | 2018-10-12 | Method and device for improving accuracy of engineering geological investigation pressurized water test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109296364B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110186827B (en) * | 2019-04-09 | 2021-07-06 | 河海大学 | Water pressurizing test device and test method |
| CN113466099B (en) * | 2021-06-17 | 2023-09-19 | 中煤科工集团西安研究院有限公司 | Pressurized water test device and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1143928A (en) * | 1997-07-29 | 1999-02-16 | Raito Kogyo Co Ltd | Hole boring member for water permeability test, and water permeability test method using same |
| CN103196800A (en) * | 2013-04-17 | 2013-07-10 | 南京大学 | Structural plane transmission coefficient determining method and test device |
| CN106869909A (en) * | 2017-01-11 | 2017-06-20 | 河海大学 | It is determined that inclining the test device and its method of testing of filled opening hydrogeological parameter |
| CN206725399U (en) * | 2017-05-22 | 2017-12-08 | 马俊强 | A kind of packer permeability test device of engineering geological investigation |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6761062B2 (en) * | 2000-12-06 | 2004-07-13 | Allen M. Shapiro | Borehole testing system |
-
2018
- 2018-10-12 CN CN201811192057.0A patent/CN109296364B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1143928A (en) * | 1997-07-29 | 1999-02-16 | Raito Kogyo Co Ltd | Hole boring member for water permeability test, and water permeability test method using same |
| CN103196800A (en) * | 2013-04-17 | 2013-07-10 | 南京大学 | Structural plane transmission coefficient determining method and test device |
| CN106869909A (en) * | 2017-01-11 | 2017-06-20 | 河海大学 | It is determined that inclining the test device and its method of testing of filled opening hydrogeological parameter |
| CN206725399U (en) * | 2017-05-22 | 2017-12-08 | 马俊强 | A kind of packer permeability test device of engineering geological investigation |
Non-Patent Citations (1)
| Title |
|---|
| 段伟强 ; 何金生 ; 李石雷 ; .苏丹大坝勘察岩体压水试验存在问题浅析及试验成果分析研究.工程勘察.2010,(02),第48-51页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109296364A (en) | 2019-02-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109296364B (en) | Method and device for improving accuracy of engineering geological investigation pressurized water test | |
| CN202583038U (en) | Flexible wall penetration tester | |
| CN105067494A (en) | Permeability testing method and device based on radial percolation experiment | |
| CN209821028U (en) | Rock core permeability testing arrangement | |
| CN111982781A (en) | Sample cylinder sealing structure for rock soil sample permeability detection | |
| CN104297126A (en) | Gas seepage starting pressure gradient measuring device and method for low-permeability reservoir | |
| CN109374498A (en) | A kind of Single Fracture Seepage of Rock Masses stress coupling system and method | |
| CN213423172U (en) | Automatic testing arrangement of native expansion rate expands | |
| CN110924907A (en) | Multi-section pressure measurement water-air alternative oil extraction experimental device and method for CT scanning | |
| CN202994649U (en) | Transparency meter | |
| CN115144319A (en) | Measuring device for slurry permeability of shield tunnel | |
| CN209690139U (en) | A kind of isothermal adsorption device changing gas density | |
| CN112179826B (en) | Device for measuring dynamic capillary force of high-temperature and high-pressure rock core based on time domain reflection technology and experimental method | |
| CN201133888Y (en) | Material permeability coefficient measurement unit based on transfiguration | |
| CN211178852U (en) | Verification and calibration device for pore water pressure gauge | |
| CN108169098A (en) | The reasonable mining speed simulator of coal bed gas straight well single-phase flow | |
| CN202250044U (en) | Automatic collecting instrument for dynamic liquid level of oil well | |
| CN203025067U (en) | Low-osmosis rock sample permeability tester | |
| CN109307628B (en) | Mud film shear strength test instrument and mud film shear strength measurement method thereof | |
| CN208999002U (en) | Under a kind of vacuum preloading in drain bar vacuum degree monitoring system | |
| CN104748903B (en) | Liquid-gas conversion pressure measurement device and pressure measurement device with synchronous electrical measurement and digital display for tests | |
| CN207600859U (en) | A kind of Soil K+adsorption instrument | |
| CN212932290U (en) | Shale gas content continuous measurement device | |
| CN212483423U (en) | Nuclear magnetic resonance experiment system for acidification and permeability increase of low-permeability coal bed | |
| CN113464123B (en) | Quick water finding method and pipe column for high-pressure water outlet horizontal well coiled tubing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |