CN210087307U - Device for testing cementing surface of shaft sleeve-cement sheath in high-temperature and high-pressure environment of dry hot rock stratum - Google Patents
Device for testing cementing surface of shaft sleeve-cement sheath in high-temperature and high-pressure environment of dry hot rock stratum Download PDFInfo
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Abstract
The device for testing the cementing surface of the shaft sleeve-cement sheath in the high-temperature and high-pressure environment of the hot dry rock stratum of the utility model takes the sleeve as the center in the horizontal direction and sequentially comprises the sleeve, the cement sheath, the stratum rock, a horizontal loading force transmission component and a heat preservation layer from inside to outside; and heating devices are uniformly arranged on the inner side of the heat-insulating layer. The heating device adopts an electric heating alloy wire as a heating element, and the heat-insulating layer adopts a ceramic fiber plate-micropore heat-insulating plate as a heat-insulating material. The horizontal loading force transmission component is connected with the hydraulic oil cylinder to obtain the pressure in the horizontal direction; the vertical loading force transmission component is connected with the universal testing machine to obtain the pressure in the vertical direction. The sleeve is connected with a water pump through a water pipe to form a circulating system. The test apparatus also includes a leak test system for monitoring the fracture of the bond. The testing device not only can enable the environment temperature to meet the requirement of the formation temperature of the hot dry rock, but also provides accurate application of non-uniform ground stress field loads, so that real indoor test data of the hot dry rock are obtained.
Description
Technical Field
The utility model belongs to hot dry rock engineering well cementation field, concretely relates to test device and method of pit shaft sleeve pipe-cement sheath cementation intensity under hot dry rock stratum high temperature, high pressure environment.
Background
Geothermal resources are a novel and clean renewable energy source, and are one of green new energy sources which can effectively solve the problems of traditional fossil fuels and energy shortage and air pollution at present. A large amount of geothermal energy is stored in Hot Dry Rock (HDR) geothermal resources several kilometers deep, so the hot dry rock is also called enhanced geothermal resources. The dry hot rock is a high-temperature rock body without fluid or with a small amount of underground fluid inside, has few pores or cracks, has extremely poor permeability, is generally higher than 200 ℃, is mostly medium-acid invaded rock from middle generations, but can also be medium-new-generation metamorphic rock or even massive sedimentary rock with huge thickness. Therefore, commercial exploitation of geothermal resources can be achieved only by means of reservoir modification techniques such as external hydraulic fracturing.
At present, the most important method for developing dry and hot rock resources is a hydraulic fracturing method. The hydraulic fracturing method is characterized in that normal-temperature fracturing fluid is injected at high pressure through an injection well, so that the aim of fracturing a geothermal reservoir of dry hot rock is fulfilled; by means of hydraulic fracturing, a reservoir stratum heat exchange channel can be established, so that the reservoir stratum heat exchange area is enlarged, and the heat exchange rate of the injected fluid and the surrounding rock mass is accelerated. And meanwhile, a production well is drilled in a fracture reconstruction area to realize fluid circulation extraction, and high-temperature fluid produced by the production well can be re-injected into an injection well after being cooled in the production process and can be used as injection fluid again, so that the aim of recycling is fulfilled.
However, the environment of the casing-cement sheath cementing surface and other structures in the shaft system in the dry heat rock reservoir is very severe, and the cementing surface structure is the weakest structure of the shaft system, so that the fracturing of the cementing surface is very easy to occur in the using process, thereby bringing great economic loss. Therefore, the research on the cementing strength of the casing-cement sheath cementing surface in the hot dry rock stratum has very important significance for the utilization of hot dry rock resources. The invention patent application 201710916807.3 discloses a hydraulic fracturing simulation experiment device and method for a hot dry rock enhanced geothermal system, which simulates a high-pressure and high-temperature generation environment of hot dry rock, applies accurate stress to a rock core by designing a multi-stage piston, keeps the permeability of hot dry rock fluid by adopting a pressure-resistant and temperature-resistant porous plate, is externally connected to a fluid collection chamber by a diversion trench, and simultaneously embeds an adjustable acoustic emission probe inside a true triaxial high-pressure axe to monitor an acoustic emission event during fracture expansion in the hydraulic fracturing process, and can realize the integrated collection of information such as rock hydraulic fracturing-acoustic emission-heat energy collection efficiency and the like under triaxial confining pressure conditions by utilizing the device to research the initiation and expansion conditions of the hot dry rock hydraulic fracture. The hydraulic fracturing cavity is used as a support, and three-dimensional pressure is realized by applying pressure through a multi-stage piston; the problem of uneven pressure is solved to a certain extent by applying pressure by 8 pistons, but in the process of applying pressure by the pistons, the hydraulic fracturing cavity per se can share certain pressure and can deform to a certain extent, so that the pressures in three directions interfere with each other, and the accuracy of applying ground stress in the three directions is reduced. Whether the simulation device can accurately simulate a specific experimental environment is an important index for measuring the simulation device; and is also the key point for studying the cementing strength of the casing-cement sheath of the well bore in the hot dry rock formation.
Disclosure of Invention
Problem to analogue means existence among the prior art, the utility model provides a hot dry rock stratum high temperature high pressure environment pit shaft sleeve pipe-cement sheath cemented surface testing arrangement, not only ambient temperature can reach the requirement of hot dry rock stratum temperature, provides the application of accurate inhomogeneous ground stress field load moreover to obtain real hot dry rock indoor test data.
The technical scheme of the utility model:
the testing device for the casing-cement sheath cementing surface of the shaft in the high-temperature and high-pressure environment of the hot dry rock stratum comprises a casing, a cement sheath, stratum rock, a horizontal loading force transfer component and a heat insulation layer sequentially from inside to outside, wherein the casing is used as a center in the horizontal direction; and heating devices are uniformly arranged on the inner side of the heat-insulating layer. The heating device adopts an electric heating alloy wire as a heating element, and the heat preservation device adopts a ceramic fiber plate-micropore heat insulation plate as a heat preservation material.
The horizontal loading force transmission component is a square structure with an I-shaped cross section and comprises a square component I, a square component III and a connecting component II for connecting the square component I and the square component III. The square member I is positioned inside the heat insulation layer, the square member III is positioned outside the heat insulation layer, and the connecting member II penetrates through the heat insulation layer. The horizontal loading force transmission component is connected with the hydraulic oil cylinder through a square component III to obtain the pressure in the horizontal direction; and then applying pressure to the formation rock through the square member I. The periphery of the horizontal section of the formation rock is square, and the sizes of four side surfaces of the formation rock in the vertical direction are matched with the square component II of the horizontal loading force transmission component, so that the uniform application of the pressure in the horizontal direction is realized. And the hydraulic oil cylinder is fixedly connected with the T-shaped steel beam through an oil cylinder fixing structure. The number of the T-shaped steel beams is two, and the T-shaped steel beams are not related to each other. The structural design of the T-shaped steel beam can reduce the deformation of the steel beam caused by the horizontal load applied by the hydraulic oil cylinder to the maximum extent.
The vertical loading force transmission component comprises a square component IV, a square component VI and a connecting component V for connecting the square component IV and the square component VI, and the connecting component V is composed of four columnar structures. The square member IV is positioned inside the heat insulation layer, the square member VI is positioned outside the heat insulation layer, and the connecting member V penetrates through the heat insulation layer. The vertical loading force transfer component is connected with a universal testing machine through a square component VI to obtain pressure in the vertical direction, and then is connected with a cement sheath and formation rock through a square component IV to apply vertical pressure. The square component IV of the vertical loading force transmission component is matched with the shapes of the cement sheath and the upper end surface and the lower end surface of the stratum rock, so that the uniform application of the pressure in the vertical direction is realized. It is particularly emphasized that there is no correlation between the two T-section beams and the vertical loading, so as to avoid interference between the applied pressures.
The upper end and the lower end of the sleeve are both connected with water pipes, and are connected with a water pump through the water pipes to form a circulating system; the pressure is provided by a water pump to apply the internal pressure of the sleeve, and the temperature of the water circulating at high speed is used for controlling the temperature of the inner wall of the sleeve.
The test apparatus also includes a leak test system for monitoring the fracture of the bond. The leakage testing system comprises a leakage testing interface, a pressure gauge, a valve and a pressure pump; the leakage test interface is arranged in the cement ring and is sequentially connected with the pressure gauge, the valve and the pressure pump through pipelines.
Preferably, the testing device comprises an upper part and a lower part which are symmetrical in structure and can be disassembled; the heat preservation box is split into an upper movable part and a lower movable part, and meanwhile, a horizontal load is also divided into two parts along the axial direction of a shaft and is loaded simultaneously; the method is convenient for scanning the cementing surface of the casing-cement sheath and the crack expansion process of the cement sheath in real time by adopting a CT machine.
The preparation method of the device for testing the cementing surface of the shaft sleeve-cement sheath in the high-temperature and high-pressure environment of the hot dry rock stratum comprises the following steps: preparing a cuboid rock sample, drilling a hole in the middle of the sample, placing a casing in the center of the drilled hole, and pouring cement into an annular area between the rock and the casing in a mixing and stirring manner; drilling a hole in the side face of the rock sample, and embedding a leakage test interface in the annular space region through the hole to be close to the outer wall of the sleeve; then placing the sample into an environment box, and fixing the sample by using a horizontal loading force transmission component and a vertical loading force transmission component; the environment box comprises an insulating layer and a heating device arranged in the insulating layer; the horizontal loading force transmission component is connected with the hydraulic oil cylinder to obtain the pressure in the horizontal direction; the vertical loading force transmission component is connected with a universal pressure testing machine to obtain the pressure in the vertical direction. The temperature range that the testing device can realize is 150 ℃ -500 ℃.
The use method of the device for testing the cementing surface of the shaft sleeve-cement sheath in the high-temperature and high-pressure environment of the hot dry rock stratum comprises the following steps:
starting a heating device, heating the ambient temperature to the formation temperature of the hot dry rock, keeping the temperature constant, and maintaining the sample;
secondly, starting a hydraulic oil cylinder, and applying two main stresses in the horizontal direction of the stratum through a horizontal loading force transfer component; starting the universal pressure testing machine, and applying vertical stress through the vertical loading force transmission component; slowly applying main stress in three directions at the same time until the test requirement is met;
and (III) carrying out cementing surface cementing strength test between the casing and the cement ring by using a leakage test system, which specifically comprises the following steps: opening a valve, filling gas in the pressure pump into the end part of the leakage test interface, observing the change of a pressure gauge, and recording a pressure value P1;
(IV) turning off the valve, setting the temperature of water in the water tank, turning on the water pump connecting valve, turning on the water pump to circulate water in the sleeve to realize the temperature change of the sleeve, turning off the water pump after a period of time, and turning off the water pump connecting valve; repeating the operation until reaching the test design times;
fifthly, opening a valve according to the step (three), filling gas in the pressure pump to the position of the cementing surface of the casing and the cement sheath through the embedded end part of the leakage test interface, observing the change of a pressure gauge, and recording a pressure value P2;
(VI) turning off the valve, setting the temperature of water in the water tank, opening the water pump connecting valve, starting the water pump, and setting the output power of the water pump to reach the internal pressure of the sleeve required by the test; the output power of the water pump is adjusted to realize the change of the internal pressure of the sleeve;
seventhly, opening a valve according to the step (three), filling gas in the pressure pump to the position of the cementing surface of the casing and the cement sheath through the embedded end part of the leakage test interface, observing the change of a pressure gauge, and recording a pressure value P3;
and (eighthly), in the test process, separating the upper part and the lower part of the environment box, and placing the X-ray transmitting end of the X-CT machine at the middle position of the sample, thereby scanning the cementing surface of the casing-cement sheath and the crack propagation process of the cement sheath in real time.
The utility model has the advantages that:
(1) hot dry rock stratum high temperature high pressure environment well cementation cement sheath testing arrangement, not only ambient temperature can reach the requirement of hot dry rock stratum temperature, provides the application of accurate inhomogeneous ground stress field load moreover to obtain real hot dry rock indoor test data.
(2) The testing device is designed into an upper part and a lower part which can be split, so that the real-time scanning of the casing-cement sheath cementing surface and the cement sheath crack expanding process is realized; by combining the fracture condition of the cementing surface monitored by a leakage testing system, various challenges of the cementing surface in the actual environment can be comprehensively simulated, so that a countermeasure can be found to avoid huge economic loss caused by the challenges.
Drawings
FIG. 1 is a schematic structural diagram of a cementing cement ring testing device in a high-temperature and high-pressure environment of a dry-hot rock stratum;
FIG. 2 is a schematic structural view of the section A-A' in FIG. 1.
Wherein: 1. the device comprises the stratum rock, 2 parts of a cement sheath, 3 parts of a sleeve, 4 parts of an insulating layer, 5 parts of a heating device, 6 parts of a T-shaped steel beam, 7 parts of a vertical loading force transmission component, 8 parts of a horizontal loading force transmission component, 9 parts of a hydraulic oil cylinder, 10 parts of an oil cylinder fixing structure, 11 parts of a gasket, 12 parts of a leakage test interface, 13 parts of a pressure gauge, 14 parts of a valve, 15 parts of a pressure pump, 16 parts of a water pump, 17 parts of a water tank and 18 parts of a CT scanning window.
Detailed Description
The present invention will be further described with reference to the following examples.
The preparation method of the device for testing the cementing surface of the shaft sleeve-cement sheath in the high-temperature and high-pressure environment of the hot dry rock stratum comprises the following steps: preparing a cuboid rock sample, drilling a hole in the middle of the sample, placing a casing 3 in the center of the drilled hole, and pouring cement mixed and stirred into an annular area between the rock and the casing 3. Drilling a hole at the side position of the rock sample, and embedding a leakage testing interface 12 into the annular region through the hole to be close to the outer wall of the casing pipe; then the sample is placed in an environment box and is fixed by a horizontal loading force transmission component 8 and a vertical loading force transmission component 7; the environment box comprises a heat-insulating layer 4 and a heating device 5 arranged inside the heat-insulating layer 4. The horizontal loading force transmission component 8 is connected with a hydraulic oil cylinder 9 to obtain the pressure in the horizontal direction; the vertical loading force transmission component 7 is connected with a universal pressure testing machine to obtain the pressure in the vertical direction. The temperature range that the testing device can realize is 150 ℃ -500 ℃.
The testing device for the casing-cement sheath cementing surface of the shaft in the high-temperature and high-pressure environment of the hot dry rock stratum comprises a casing 3, a cement sheath 2, stratum rocks 1, a horizontal loading force transfer component 8 and a heat insulation layer 4 from inside to outside in sequence by taking the casing 3 as a center in the horizontal direction; and heating devices 5 are uniformly arranged on the inner side of the heat-insulating layer 4. The heating device 5 adopts an electric heating alloy wire as a heating element, and the heat preservation device 4 adopts a ceramic fiber plate-micropore heat insulation plate as a heat preservation material.
The horizontal loading force transfer member 8 is a square structure with an I-shaped cross section, and the horizontal loading force transfer member 8 comprises a square member I, a square member III and a connecting member II connecting the square member I and the square member III. The square member I is positioned inside the heat preservation layer 4, the square member III is positioned outside the heat preservation layer 4, and the connecting member II penetrates through the heat preservation layer 4. The horizontal loading force transmission component 8 is connected with a hydraulic oil cylinder 9 through a square component III to obtain the pressure in the horizontal direction; and thereby applies pressure to the formation rock 1 through the square member I. The periphery of the horizontal section of the formation rock 3 is square, and the sizes of four side surfaces of the formation rock 3 in the vertical direction are matched with the square component II of the horizontal loading force transmission component 8, so that the uniform application of the pressure in the horizontal direction is realized. And the hydraulic oil cylinder 9 is fixedly connected with the T-shaped steel beam 6 through an oil cylinder fixing structure 10 and a gasket 11. The number of the T-shaped steel beams 6 is two, and the T-shaped steel beams are not related to each other. The cross section of the T-section steel beam is T-shaped as shown in fig. 2, and both T-section steel beams surround the insulating layer 4 along the square member III (as shown in fig. 1).
The vertical loading force transmission component 7 is arranged at each of the upper end and the lower end of the testing device, the vertical loading force transmission component 7 comprises a square component IV, a square component VI and a connecting component V for connecting the square component IV and the square component VI, and the connecting component V is composed of four columnar structures. The square member IV is positioned inside the heat insulation layer 4, the square member VI is positioned outside the heat insulation layer 4, and the connecting member V penetrates through the heat insulation layer 4. The vertical loading force transmission component 7 is connected with a universal testing machine through a square component VI to obtain the pressure in the vertical direction, and then is connected with the cement sheath 2 and the formation rock 1 through a square component IV to apply the vertical pressure. The square component IV of the vertical loading force transmission component 7 is matched with the shapes of the cement sheath and the upper and lower end faces of the formation rock 1, so that the uniform application of the pressure in the vertical direction is realized.
Wherein, the upper and lower ends of the sleeve 3 are connected with water pipes, and are connected with a water pump 16 and a water tank 17 through the water pipes to form a circulating system; the pressure is supplied by the water pump 16 to apply the internal pressure of the casing while the temperature of the water circulating at high speed is used to control the temperature of the inner wall of the casing 3.
The test apparatus also includes a leak test system for monitoring the fracture of the bond. The leakage testing system comprises a leakage testing interface 12, a pressure gauge 13, a valve 14 and a pressure pump 15; the leakage test interface 12 is arranged in the cement sheath 2 and is connected with a pressure gauge 13, a valve 14 and a pressure pump 15 in sequence through pipelines.
The testing device comprises an upper part and a lower part which are symmetrical in structure and can be split, and a CT scanning window 18 is arranged; the method comprises the following steps of splitting an environment box into an upper movable part and a lower movable part, and simultaneously dividing a horizontal load into two parts along the axial direction of a shaft and simultaneously loading; the method is convenient for scanning the cementing surface of the casing-cement sheath and the crack expansion process of the cement sheath in real time by adopting a CT machine.
The use method of the device for testing the cementing surface of the shaft sleeve-cement sheath in the high-temperature and high-pressure environment of the hot dry rock stratum comprises the following steps:
and (I) starting the heating device 5, heating the environment to the formation temperature of the dry hot rock, keeping the temperature constant, and maintaining the sample.
Secondly, starting a hydraulic oil cylinder 9, and applying two main stresses in the horizontal direction of the stratum through a horizontal loading force transfer component 8; starting the universal pressure testing machine, and applying vertical stress through the vertical loading force transmission component 7; and simultaneously and slowly applying main stress in three directions until the test requirement is met.
And (III) carrying out cementing surface cementing strength test between the casing and the cement ring by using a leakage test system, which specifically comprises the following steps: the valve 14 is opened, gas from the pressure pump 15 is filled into the end of the leak test port 12, the change in the pressure gauge 13 is observed, and the initial pressure value P1, i.e. the pressure at the initial casing-cement interface, is recorded.
(IV) turning off the valve 14, setting the temperature of the water in the water tank 17, turning on the water pump connecting valve, turning on the water pump 16 to circulate the water in the casing 3 to realize the temperature change of the casing, turning off the water pump 16 after a period of time, and turning off the water pump connecting valve; and repeating the operation until reaching the experimental design times.
And (V) according to the step (III), opening the valve 14, filling the gas in the pressure pump 15 to the positions of the cementing surface of the casing 3 and the cement sheath 2 through the embedded end part of the leakage test interface 12, observing the change of the pressure gauge 13, and recording a pressure value P2, namely the pressure at the cementing surface of the casing-cement after the temperature of the casing changes. If fracture of the bond occurs, P2< P1; meanwhile, the degree of damage of the cemented surface can be judged according to the reduced pressure value, and the more the reduction is, the more serious the damage of the cemented surface is.
Sixthly, the valve 14 is turned off, the temperature of water in the water tank 17 is set, the water pump connecting valve is opened, the water pump 16 is started, the output power of the water pump is set, and the internal pressure of the sleeve pipe required by the test is achieved; the change of the internal pressure of the sleeve can be realized by adjusting the output power of the water pump.
And (seventhly) according to the step (three), opening the valve 14, filling the gas in the pressure pump 15 to the positions of the cementing surface of the casing 3 and the cement sheath 2 through the embedded end part of the leakage test interface 12, observing the change of the pressure gauge 13, and recording a pressure value P3, namely the pressure at the cementing surface of the casing-cement after the internal pressure of the casing changes. If fracture of the bond occurs, P3< P1; meanwhile, the degree of damage of the cemented surface can be judged according to the reduced pressure value, and the more the reduction is, the more serious the damage of the cemented surface is.
And (eighthly), in the test process, separating the upper part and the lower part of the temperature environment box, and placing the X-ray emission end of the X-CT machine at the middle position of the sample, thereby scanning the cementing surface of the casing-cement sheath and the crack propagation process of the cement sheath in real time.
Claims (8)
1. Dry heat rock stratum high temperature and high pressure environment shaft sleeve pipe-cement sheath cemented surface testing arrangement, its characterized in that: the testing device takes the casing (3) as a center in the horizontal direction and sequentially comprises the casing (3), a cement sheath (2), formation rocks (1), a horizontal loading force transfer component (8) and a heat insulation layer (4) from inside to outside; heating devices (5) are uniformly arranged on the inner side of the heat-insulating layer (4); the horizontal loading force transmission component (8) is of a square structure with an I-shaped cross section, and the horizontal loading force transmission component (8) comprises a square component I, a square component III and a connecting component II for connecting the square component I and the square component III; the square component I is positioned inside the heat insulation layer (4), the square component III is positioned outside the heat insulation layer (4), and the connecting component II penetrates through the heat insulation layer (4); the horizontal loading force transfer component (8) applies pressure to the formation rock (1) through the square component I; the vertical loading force transmission component (7) is arranged at each of the upper end and the lower end of the testing device, the vertical loading force transmission component (7) comprises a square component IV, a square component VI and a connecting component V for connecting the square component IV and the square component VI, and the connecting component V is composed of four columnar structures; the square component IV is positioned inside the heat-insulating layer (4), the square component VI is positioned outside the heat-insulating layer (4), and the connecting component V penetrates through the heat-insulating layer (4); the vertical loading force transfer component (7) is connected with the cement sheath (2) and the stratum rock (1) through a square component IV to apply vertical pressure.
2. The dry hot rock formation high temperature and high pressure environment wellbore casing-cement sheath cementing surface testing device of claim 1, which is characterized in that: the horizontal loading force transmission component (8) is connected with a hydraulic oil cylinder (9) through a square component III to obtain the pressure in the horizontal direction; the vertical loading force transmission component (7) is connected with a universal testing machine through a square component VI to obtain the pressure in the vertical direction.
3. The dry hot rock formation high temperature and high pressure environment wellbore casing-cement sheath cementing surface testing device of claim 2, which is characterized in that: the periphery of the horizontal section of the stratum rock (1) is square, and the sizes of four side surfaces of the stratum rock (1) in the vertical direction are matched with a square component II of a horizontal loading force transmission component (8) so as to realize uniform application of pressure in the horizontal direction; the square component IV of the vertical loading force transmission component (7) is matched with the shapes of the upper end face and the lower end face of the cement sheath and the formation rock (1) so as to realize the uniform application of the pressure in the vertical direction.
4. The dry hot rock formation high temperature and high pressure environment wellbore casing-cement sheath cementing surface testing device of claim 2, which is characterized in that: the hydraulic oil cylinder (9) is fixedly connected with the T-shaped steel beam (6) through an oil cylinder fixing structure (10) and a gasket (11).
5. The dry hot rock formation high temperature and high pressure environment wellbore casing-cement sheath cementing surface testing device of claim 3 or 4, which is characterized in that: the upper end and the lower end of the sleeve (3) are both connected with water pipes, and are connected with a water pump through the water pipes to form a circulating system.
6. The dry hot rock formation high temperature and high pressure environment shaft sleeve-cement sheath cementing surface testing device of claim 5, which is characterized in that: the testing device comprises an upper part and a lower part which are symmetrical in structure and can be split.
7. The dry hot rock formation high temperature and high pressure environment shaft sleeve-cement sheath cementing surface testing device of claim 5, which is characterized in that: the heating device (5) adopts an electric heating alloy wire as a heating element, and the heat-insulating layer (4) adopts a ceramic fiber plate-micropore heat-insulating plate as a heat-insulating material.
8. The dry hot rock formation high temperature and high pressure environment shaft sleeve-cement sheath cementing surface testing device of claim 5, which is characterized in that: the testing device also comprises a leakage testing system, wherein the leakage testing system comprises a leakage testing interface (12), a pressure gauge (13), a valve (14) and a pressure pump (15); the leakage test interface (12) is arranged in the cement sheath (2) and is sequentially connected with the pressure gauge (13), the valve (14) and the pressure pump (15) through pipelines.
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| CN201920765478.1U CN210087307U (en) | 2019-05-27 | 2019-05-27 | Device for testing cementing surface of shaft sleeve-cement sheath in high-temperature and high-pressure environment of dry hot rock stratum |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110005400A (en) * | 2019-05-27 | 2019-07-12 | 青岛理工大学 | Device for testing cementing surface of shaft sleeve-cement sheath in high-temperature and high-pressure environment of dry hot rock stratum |
| CN114033360A (en) * | 2021-11-15 | 2022-02-11 | 西南石油大学 | Full-life-cycle shaft sealing integrity evaluation device and method |
| CN114429011A (en) * | 2020-09-16 | 2022-05-03 | 中国石油化工股份有限公司 | Method and device for calculating heat exchange total surface of hot dry rock thermal storage fracturing fracture and medium |
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2019
- 2019-05-27 CN CN201920765478.1U patent/CN210087307U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110005400A (en) * | 2019-05-27 | 2019-07-12 | 青岛理工大学 | Device for testing cementing surface of shaft sleeve-cement sheath in high-temperature and high-pressure environment of dry hot rock stratum |
| CN110005400B (en) * | 2019-05-27 | 2023-12-05 | 青岛理工大学 | Device for testing cementing surface of shaft sleeve and cement sheath in high-temperature and high-pressure environment of dry-hot rock stratum |
| CN114429011A (en) * | 2020-09-16 | 2022-05-03 | 中国石油化工股份有限公司 | Method and device for calculating heat exchange total surface of hot dry rock thermal storage fracturing fracture and medium |
| CN114033360A (en) * | 2021-11-15 | 2022-02-11 | 西南石油大学 | Full-life-cycle shaft sealing integrity evaluation device and method |
| CN114033360B (en) * | 2021-11-15 | 2023-05-26 | 西南石油大学 | Full life cycle shaft seal integrity evaluation device and method |
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