CN105806727A - Change feature measuring and simulating device of rock under temperature change - Google Patents
Change feature measuring and simulating device of rock under temperature change Download PDFInfo
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- CN105806727A CN105806727A CN201610282355.3A CN201610282355A CN105806727A CN 105806727 A CN105806727 A CN 105806727A CN 201610282355 A CN201610282355 A CN 201610282355A CN 105806727 A CN105806727 A CN 105806727A
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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
- G01N3/60—Investigating resistance of materials, e.g. refractory materials, to rapid heat changes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/07—Analysing solids by measuring propagation velocity or propagation time of acoustic waves
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- 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
- G01N2203/0057—Generation of the force using stresses due to heating, e.g. conductive heating, radiative heating
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0232—Glass, ceramics, concrete or stone
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- Acoustics & Sound (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a change feature measuring and simulating device of rock under temperature change. The change feature measuring and simulating device of rock under temperature change comprises a core tube, a cooling liquid assembly, a heating assembly and a sound wave measuring assembly, wherein an axial through hole used for installing a rock core is arranged inside the core tube; the inner diameters of the two ends of the axial through hole are smaller than the inner diameter of the middle part of the axial through hole; the cooling liquid assembly is communicated with the axial through hole and can inject cooling liquid into the axial through hole; the heating assembly is used for heating the rock core arranged in the core tube; the sound wave measuring assembly is used for measuring the speed of sound waves passing through the rock core in the core tube. The change feature measuring and simulating device of rock under temperature change has the advantages that the change feature measuring and simulating device of rock under temperature change can be used for simulating the rise and reduction of temperature of rock at the well bottom in the gas drilling process; the real-time longitudinal wave speed change along with the temperature change is measured; the dynamic change of the damage features of the rock under the temperature serious change condition can be simulated; relevant parameters can be directly obtained.
Description
Technical field
The present invention relates to field of oil drilling, specifically a kind of rock variation characteristic measure analog device under variations in temperature.
Background technology
In During Air Drilling, due to the Joule-Thomson effect produced at nozzle place, bottom hole temperature (BHT) can be made to reduce rapidly in the short period of time, reach the freezing point following, produce ice bag.Bottom-hole rock temperatures reduces from prime stratum jump in temperature, and this change produces interference for the hole of rock, crack and mineral cement etc., and then the intensity etc. of rock is produced impact.Research jump in temperature when, the destruction characteristic of rock, for gas drilling drilling speed raising highly significant.Owing to shaft bottom operating mode is complicated, it is impossible to measuring the situation of change of bottom rock, more existing devices do not carry out the synchronization measure of the change of temperature and sound wave.
Summary of the invention
Cannot analogue measurement bottom rock variation characteristic under variations in temperature in order to overcome in prior art, the invention provides a kind of rock variation characteristic measure analog device under variations in temperature, to reach the purpose of analogue measurement bottom rock situation of change under variations in temperature.
The technical solution adopted for the present invention to solve the technical problems is: a kind of rock variation characteristic measure analog device under variations in temperature, this rock variation characteristic measure analog device under variations in temperature includes: core cylinder, being internally provided with the axially extending bore for installing core, the internal diameter at the two ends of this axially extending bore is less than the internal diameter of this axially extending bore mid portion；Coolant assembly, connects with axially extending bore and can inject coolant in axially extending bore；Heating assembly, for the core in heating core cylinder；Acoustic measurement assembly, for measuring by the SVEL of core in core cylinder.
Further, the barrel of core cylinder is provided with the open slot connected with axially extending bore, and coolant assembly includes filling funnel, and the miner diameter end of filling funnel connects with open slot.
Further, the surrounding of open slot contains cell wall, the raw edge of lid it is additionally provided with outside core cylinder, raw edge includes side perisporium and roof, the side perisporium of raw edge is located at outside the cell wall of open slot, the miner diameter end of filling funnel can pass the spliced eye of raw edge upper end and connect with open slot, and the roof of raw edge offers multiple spaced coolant evaporation hole, and this coolant evaporation hole connects with open slot.
Further, this acoustic measurement assembly includes probe, Sound wave measurement instrument and probe data line, probe is two, two probes are connected with Sound wave measurement instrument by probe data line, when this rock variation characteristic measure analog device under variations in temperature is in use state, two probes abut with two end faces of core respectively.
Further, when this rock variation characteristic measure analog device under variations in temperature is in use state, the dead in line of two geometric center lines popped one's head in and core cylinder.
Further, heating assembly includes two identical thermal resistances, when this rock variation characteristic measure analog device under variations in temperature is in use state, two identical thermal resistances are all fitted with the outer peripheral face of core, and two identical thermal resistances are respectively symmetrically between the two ends of the two ends being arranged at core and core cylinder.
Further, this rock variation characteristic measure analog device under variations in temperature also includes temperature survey assembly, temperature survey assembly includes data collecting card, temperature automated collection systems and connecting line, two identical thermal resistances are connected with data collecting card each through connecting line, and data collecting card is connected with temperature automated collection systems.
Further, rock variation characteristic measure analog device under variations in temperature also includes clamp assemblies, and clamp assemblies includes two grip blocks, and a probe is fixed on one of them grip block, and another probe is fixed on another grip block.
Further, the inner surface of each grip block being provided with semicircular ring deep trouth, probe grafting is fixed in semicircular ring deep trouth, and the external diameter of probe is identical with the internal diameter of semicircular ring deep trouth.
Further, being provided with extension spring between two grip blocks, when this rock variation characteristic measure analog device under variations in temperature is in use state, probe can be pressed in the two ends of core by two grip blocks under the effect of extension spring.
The invention has the beneficial effects as follows, the present invention can be used for simulating the lifting of bottom-hole rock temperatures in gas drilling, meanwhile, measures the real-time velocity of longitudinal wave change varied with temperature, the dynamic change of bottom rock destructive characteristics under variations in temperature can be simulated, and directly obtain relevant parameter.
Accompanying drawing explanation
The Figure of description constituting the part of the application is used for providing a further understanding of the present invention, and the schematic description and description of the present invention is used for explaining the present invention, is not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of the rock of the present invention variation characteristic measure analog device embodiment under variations in temperature；
Fig. 2 is the side view of embodiment of the present invention SMIS cylinder；
Fig. 3 is that the A-A of Fig. 2 is to sectional view；
Fig. 4 is the assembling structural representation of raw edge and filling funnel in the embodiment of the present invention；
Fig. 5 is the top view of raw edge in the embodiment of the present invention；
Fig. 6 is the structural representation of clamp assemblies in the embodiment of the present invention.
Accompanying drawing labelling in figure: 10, core cylinder；11, open slot；111, cell wall；12, raw edge；121, coolant evaporation hole；122, spliced eye；123, side perisporium；124, roof；13, bracing frame；21, filling funnel；22, two logical piston；31, probe；32, Sound wave measurement instrument；33, probe data line；41, thermal resistance；42, data collecting card；43, temperature automated collection systems；44, connecting line；51, grip block；511, semicircular ring deep trouth；52, extension spring；90, core.
Detailed description of the invention
It should be noted that when not conflicting, the embodiment in the application and the feature in embodiment can be mutually combined.Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
As shown in Figures 1 to 6, the invention provides a kind of rock variation characteristic measure analog device under variations in temperature, this rock variation characteristic measure analog device under variations in temperature includes core cylinder 10, coolant assembly, heating assembly and acoustic measurement assembly.Core cylinder 10 is internally provided with the axially extending bore for installing core 90, and the internal diameter at the two ends of this axially extending bore is less than the internal diameter of this axially extending bore mid portion.Coolant assembly connects with axially extending bore and can inject coolant in axially extending bore.Heating assembly is for the core 90 in heating core cylinder 10.Acoustic measurement assembly is for measuring by the SVEL of core 90 in core cylinder 10.
The rock in embodiment of the present invention variation characteristic measure analog device under variations in temperature can be used for simulating the lifting of bottom-hole rock temperatures in gas drilling, simultaneously, measure the real-time velocity of longitudinal wave change varied with temperature, can analog temperature drastic change when rock the dynamic change of destructive characteristics, and directly obtain relevant parameter.
Specifically, as shown in Figures 2 to 5, core cylinder 10 is made up of No. 45 steel, the barrel top of core cylinder 10 is provided with the open slot 11 connected with axially extending bore, the surrounding of open slot 11 contains cell wall 111, and cell wall 111 is tangent with the sidewall of core cylinder 10 and welds, and ensures that weld will not leak liquid.Core cylinder 10 is axially disposed axially extending bore, the both ends internal diameter of this axially extending bore is identical with the external diameter of the core 90 prepared, the internal diameter at the gas position of this axially extending bore is all higher than the external diameter of core 90, to form ring-type cylindrical spaces between the inwall of core 90 and core cylinder 10.Above-mentioned coolant assembly includes filling funnel 21 and two logical pistons 22, and the miner diameter end of filling funnel 21 is connected with open slot 11, and the junction of this filling funnel 21 and open slot 11 is sealed by silicone grease.And coolant can be injected in above-mentioned ring-type cylindrical spaces by filling funnel 21.Above-mentioned two logical pistons 22 can regulate the flow of filling funnel 21, namely controls filling funnel 21 and flows into the coolant rate in core cylinder 10, controls the rate of cooling in core cylinder 10 thereby through controlling coolant rate.
Preferably, as shown in Figure 4 and Figure 5, the raw edge 12 of lid it is additionally provided with outside core cylinder 10, raw edge 12 includes side perisporium 123 and roof 124, the side perisporium 123 of raw edge 12 is set in outside the cell wall 111 of open slot 11, and the miner diameter end of filling funnel 21 can pass the spliced eye 122 of raw edge 12 upper end and connect with open slot 11, and open slot 11 is positioned at the mid portion of roof 124, the roof 124 of raw edge 12 offers multiple spaced coolant evaporation hole 121, and this coolant evaporation hole 121 connects with open slot 11.
It should be noted that the both ends internal diameter of axially extending bore is arranged to the structure identical with the external diameter of core 90, it is therefore an objective to by the two ends of axially extending bore, core 90 is fixed, it is prevented that core 90 rocks.Wherein, the mid portion internal diameter of the axially extending bore of the core cylinder 10 in the embodiment of the present invention is 27mm, and inner end diameter is 25.5mm, and the length of core cylinder 10 is 32mm.The longitudinal length of above-mentioned open slot 11 is 28mm, and lateral length is 10mm.The diameter of above-mentioned core 90 is 25mm, and length is 50mm.Sealed by silicone grease in the junction, two ends of core 90 with core cylinder 10.
Further, the bottom of core cylinder 10 is provided with bracing frame 13, and the bottom outer wall of this bracing frame 13 and core cylinder 10 is welded and fixed, and is used for keeping core cylinder 10 to balance and prevent core cylinder 10 from rotating.For guaranteeing the bracing frame 13 supporting role to core cylinder 10, the bottom of bracing frame 13 is parallel with laboratory table, and the bottom transverse cross section of bracing frame 13 is for square and rejects burr, and the corner dimension B between bracing frame 13 and laboratory table horizontal plane is 45 °.
Further, the length of the core cylinder 10 in the embodiment of the present invention is less than the length of core 90, and the two ends of core 90 are placed in outside the both ends of core cylinder 10.As it is shown in figure 1, the distance of core 90 left end distance core cylinder 10 left end is equal to the distance of core 90 right-hand member distance core cylinder 10 right-hand member.In the embodiment of the present invention, the outreach for ensureing core 90 two ends is identical, and staff needs adopt the actual range at vernier caliper measurement two ends and make the distance at two ends keep consistent.
As shown in Figure 1, acoustic measurement assembly in the embodiment of the present invention includes probe 31, Sound wave measurement instrument 32 and probe data line 33, probe 31 is two, two probes 31 are connected with Sound wave measurement instrument 32 by probe data line 33, when this rock variation characteristic measure analog device under variations in temperature is in use state, two probes 31 abut with two end faces of core 90 respectively.And the dead in line of the geometric center line of two probes 31 and core cylinder 10.In the embodiment of the present invention, for ensureing not cause error because of the existence in gap between probe 31 and the both ends of core 90, it is therefore desirable to smear high temperature resistance couplant on probe 31 and fill the gap between probe 31 and core 90, it is ensured that the accuracy of experimental data.
It should be noted that two probes 31 respectively transmitting probe and receiving transducers, Sound wave measurement instrument 32 can be used in measuring the SVEL through core 90.The signal that probe 31 received and be conveyed to Sound wave measurement instrument 32 is shown as time difference, and the mathematical formulae of the SVEL by core 90 that Sound wave measurement instrument measures is:Wherein, (t1-t2) receive signal for the signal time sent from transmitting probe and receiving transducer time between difference, L is the length of core 90.The SVEL of the measurement in the embodiment of the present invention is velocity of longitudinal wave, above-mentioned probe 31 senses sonic probe for twin crystal, Sound wave measurement instrument 32 is Tektronix company DPO3016DigitalPhosphorOscilloscope series of products, it is made up of impulse sender and oscillograph, design parameter is: 100MHZ, 2.5G/s.Outfit measuring probe measures, and this experiment is substantially carried out the measurement of the velocity of longitudinal wave by core 90.The built-in wafer of longitudinal wave probe is twin crystal formula, has the advantages such as clever density is high, data transmission is stable, and its specific works parameter is: 2.5MHZ, 1.0 ".
Further, heating assembly includes two PTC thermal resistances 41, when this rock variation characteristic measure analog device under variations in temperature is in use state, two PTC thermal resistances 41 are all fitted with the outer peripheral face of core 90, and two PTC thermal resistances 41 are respectively symmetrically between the two ends of the two ends being arranged at core 90 and core cylinder 10.Namely as it is shown in figure 1, the PTC thermal resistance 41 being placed in left side is placed in the midpoint of the left end of core 90 and the left end line of core cylinder 10, the PTC thermal resistance 41 being placed in right side is placed in the midpoint of the right-hand member of core 90 and the right-hand member line of core cylinder 10.
This rock variation characteristic measure analog device under variations in temperature also includes temperature survey assembly, temperature survey assembly includes data collecting card 42, temperature automated collection systems 43 and connecting line 44, two PTC thermal resistances 41 are connected with data collecting card 42 each through connecting line 44, and data collecting card 42 is connected with temperature automated collection systems 43.
It should be noted that temperature automated collection systems 43 is to adopt the graphical author language G of the LabVIEW program write, the full Chinese interface of operation control software, flexible operation, convenience；Data acquiring frequency can freely set, it is ensured that experimental precision.The resistance variations that described PTC thermal resistance 41 produces can be converted into the signal of telecommunication by data collecting card 42, sends data to described temperature automated collection systems 43, have convenient, fast and accurate advantage after arrangement.
As shown in Figure 6, rock variation characteristic measure analog device under variations in temperature also includes clamp assemblies, and clamp assemblies includes two grip blocks 51 and for connecting the extension spring 52 of two grip blocks 51.The inner surface of each grip block 51 is provided with semicircular ring deep trouth 511, the external diameter of probe 31 is identical with the internal diameter of semicircular ring deep trouth 511, and in the assembled condition, a probe 31 is fixed on one of them grip block 51, another probe 31 is fixed on another grip block 51.The two ends of above-mentioned extension spring 52 connect two grip blocks 51 respectively, when this rock variation characteristic measure analog device under variations in temperature is in use state, two probes 31 can be pressed in the two ends of core 90 respectively by two grip blocks 51 under the effect of extension spring 52.
When the rock in application embodiment of the present invention variation characteristic measure analog device under variations in temperature works, first carry out preheating debugging.Secondly, opening two logical pistons 22 to certain aperture, coolant is entered in the ring-type cylindrical spaces within core cylinder 10 by filling funnel 21 cervical region and core 90 is cooled down.In cooling procedure, coolant can be passed through the coolant evaporation hole 121 of raw edge 12 and evaporate in air.It should be noted that need to control the aperture size of two logical pistons 22 in aforesaid operations, it is ensured that coolant will not be overflowed from raw edge 12.Measure simultaneously and collect PTC thermal resistance 41 measured temperature and the interval transit time of Sound wave measurement instrument 42 display, substitute into velocity of longitudinal wave formula of asking for noted earlier and obtain the real-time velocity of longitudinal wave value by core 90.By amplifying the aperture of two logical pistons 22 gradually, it is achieved control coolant rate, the final rate of cooling realizing controlling core 90 clamped in core cylinder 10.
As can be seen from the above description, the above embodiments of the present invention achieve following technique effect:
1, there is Acoustic wave measuring apparatus and temperature gathers automatically, it is possible to measure velocity of longitudinal wave and the relation of temperature in temperature changing process in real time, sum up the Changing Patterns such as prediction rock intensity, provide reliable basis to solve gas well drilling well bottom operating mode.
2, the injection simulation shaft bottom cryogenic effect of coolant, the charge velocity controlling coolant simulates the rate of cooling that shaft bottom is different.The collection of parameter is by computer-automatic collection, and experimental data is accurately and reliably.The present invention can adopt liquid nitrogen, cold water etc. as cooling medium.
3, simulation test data can be used to understand gas drilling shaft bottom operating mode, and for optimizing drilling plan, improving bit speed provides foundation.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (10)
1. the rock variation characteristic measure analog device under variations in temperature, it is characterised in that this rock variation characteristic measure analog device under variations in temperature includes:
Core cylinder (10), is internally provided with the axially extending bore for installing core (90), and the internal diameter at the two ends of this axially extending bore is less than the internal diameter of this axially extending bore mid portion；
Coolant assembly, connects with described axially extending bore and can inject coolant in described axially extending bore；
Heating assembly, for the core (90) in heating core cylinder (10)；
Acoustic measurement assembly, for measuring the SVEL by core cylinder (10) interior core (90).
2. the rock according to claim 1 variation characteristic measure analog device under variations in temperature, it is characterized in that, the barrel of core cylinder (10) is provided with the open slot (11) connected with described axially extending bore, coolant assembly includes filling funnel (21), and the miner diameter end of filling funnel (21) connects with open slot (11).
3. the rock according to claim 2 variation characteristic measure analog device under variations in temperature, it is characterized in that, the surrounding of open slot (11) contains cell wall (111), the raw edge (12) of lid it is additionally provided with outside core cylinder (10), raw edge (12) includes side perisporium (123) and roof (124), the side perisporium (123) of raw edge (12) is set in the cell wall (111) of open slot (11) outward, the miner diameter end of filling funnel (21) can pass the spliced eye (122) of raw edge (12) upper end and connect with open slot (11), the roof (124) of raw edge (12) offers multiple spaced coolant evaporation hole (121), this coolant evaporation hole (121) connects with open slot (11).
4. the rock according to claim 1 variation characteristic measure analog device under variations in temperature, it is characterized in that, this acoustic measurement assembly includes probe (31), Sound wave measurement instrument (32) and probe data line (33), probe (31) is two, two probes (31) are connected with Sound wave measurement instrument (32) by probe data line (33), and when this rock variation characteristic measure analog device under variations in temperature is in use state, two probes (31) abut with two end faces of core (90) respectively.
5. the rock according to claim 4 variation characteristic measure analog device under variations in temperature, it is characterized in that, when this rock variation characteristic measure analog device under variations in temperature is in use state, the dead in line of the geometric center line of two probes (31) and core cylinder (10).
6. the rock according to claim 1 variation characteristic measure analog device under variations in temperature, it is characterized in that, heating assembly includes two identical thermal resistances (41), when this rock variation characteristic measure analog device under variations in temperature is in use state, two identical thermal resistances (41) are all fitted with the outer peripheral face of core (90), and two identical thermal resistances (41) are respectively symmetrically between the two ends of the two ends being arranged at core (90) and core cylinder (10).
7. the rock according to claim 6 variation characteristic measure analog device under variations in temperature, it is characterized in that, this rock variation characteristic measure analog device under variations in temperature also includes temperature survey assembly, temperature survey assembly includes data collecting card (42), temperature automated collection systems (43) and connecting line (44), two identical thermal resistances (41) are connected with data collecting card (42) each through connecting line (44), and data collecting card (42) is connected with temperature automated collection systems (43).
8. the rock according to claim 4 variation characteristic measure analog device under variations in temperature, it is characterized in that, described rock variation characteristic measure analog device under variations in temperature also includes clamp assemblies, clamp assemblies includes two grip blocks (51), one probe (31) is fixed on one of them grip block (51), and another probe (31) is fixed on another grip block (51).
9. the rock according to claim 8 variation characteristic measure analog device under variations in temperature, it is characterized in that, the inner surface of each grip block (51) is provided with semicircular ring deep trouth (511), probe (31) grafting is fixed in semicircular ring deep trouth (511), and the external diameter of probe (31) is identical with the internal diameter of semicircular ring deep trouth (511).
10. the rock according to claim 8 variation characteristic measure analog device under variations in temperature, it is characterized in that, it is provided with extension spring (52) between two grip blocks (51), when this rock variation characteristic measure analog device under variations in temperature is in use state, probe (31) can be pressed in the two ends of core (90) by two grip blocks (51) under the effect of extension spring (52).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610282355.3A CN105806727B (en) | 2016-04-29 | 2016-04-29 | Variation characteristic measurement analogue means of the rock under temperature change |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610282355.3A CN105806727B (en) | 2016-04-29 | 2016-04-29 | Variation characteristic measurement analogue means of the rock under temperature change |
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| CN105806727B CN105806727B (en) | 2017-07-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107515246A (en) * | 2017-07-14 | 2017-12-26 | 中国石油大学(华东) | A kind of detection method of carbon dioxide drive displacing front |
| CN108981984A (en) * | 2018-07-02 | 2018-12-11 | 温州大学 | For the load-measuring device under hot conditions |
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| US20130002258A1 (en) * | 2011-06-30 | 2013-01-03 | Schlumberger Technology Corporation | Device for dielectric permittivity and resistivity high temperature measurement of rock samples |
| CN103868801A (en) * | 2014-02-26 | 2014-06-18 | 中国石油天然气股份有限公司 | Rock performance evaluating device |
| CN104655495A (en) * | 2015-02-13 | 2015-05-27 | 太原理工大学 | High temperature and high pressure coal and rock true triaxial fracturing and seepage test device and test method |
| CN205656089U (en) * | 2016-04-29 | 2016-10-19 | 中国石油大学(北京) | Change pattern measurement analogue means of rock under temperature variation |
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| US5359903A (en) * | 1991-03-19 | 1994-11-01 | Exxon Production Research Company | Load cell |
| US20130002258A1 (en) * | 2011-06-30 | 2013-01-03 | Schlumberger Technology Corporation | Device for dielectric permittivity and resistivity high temperature measurement of rock samples |
| CN103868801A (en) * | 2014-02-26 | 2014-06-18 | 中国石油天然气股份有限公司 | Rock performance evaluating device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107515246A (en) * | 2017-07-14 | 2017-12-26 | 中国石油大学(华东) | A kind of detection method of carbon dioxide drive displacing front |
| CN107515246B (en) * | 2017-07-14 | 2018-08-31 | 中国石油大学(华东) | A kind of detection method of carbon dioxide drive displacing front |
| CN108981984A (en) * | 2018-07-02 | 2018-12-11 | 温州大学 | For the load-measuring device under hot conditions |
| CN108981984B (en) * | 2018-07-02 | 2020-12-29 | 温州大学 | Load measuring device for high-temperature conditions |
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| CN105806727B (en) | 2017-07-07 |
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