CN117990522B - Wellbore integrity testing device and testing process thereof - Google Patents
Wellbore integrity testing device and testing process thereof Download PDFInfo
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- CN117990522B CN117990522B CN202410397522.3A CN202410397522A CN117990522B CN 117990522 B CN117990522 B CN 117990522B CN 202410397522 A CN202410397522 A CN 202410397522A CN 117990522 B CN117990522 B CN 117990522B
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- 238000012360 testing method Methods 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000011016 integrity testing Methods 0.000 title claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 155
- 239000007788 liquid Substances 0.000 claims abstract description 106
- 239000004568 cement Substances 0.000 claims abstract description 94
- 239000012530 fluid Substances 0.000 claims description 22
- 238000010438 heat treatment Methods 0.000 claims description 22
- 238000006073 displacement reaction Methods 0.000 claims description 15
- 238000012545 processing Methods 0.000 claims description 10
- 230000000903 blocking effect Effects 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 3
- 239000013013 elastic material Substances 0.000 claims description 2
- 230000002265 prevention Effects 0.000 claims description 2
- 238000010030 laminating Methods 0.000 claims 1
- 230000006378 damage Effects 0.000 abstract description 18
- 230000000694 effects Effects 0.000 abstract description 12
- 238000012546 transfer Methods 0.000 abstract description 8
- 239000007789 gas Substances 0.000 description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000001066 destructive effect Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000009918 complex formation Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
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- 239000000126 substance Substances 0.000 description 1
- -1 that is Substances 0.000 description 1
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/04—Measuring adhesive force between materials, e.g. of sealing tape, of coating
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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Abstract
The invention relates to a well bore integrity testing device and a testing process thereof, which are applied to the field of gas well engineering, wherein the matching of a first sealing sleeve, a second sealing sleeve and a sealing hoop can effectively seal two ends of a cement ring body and a sleeve pipe body, end leakage is avoided when subsequent gas is transferred, the reliability of testing data is influenced, meanwhile, the matching of hydraulic equipment, a filling liquid disc and a testing frame is used for testing the damage degree of a gap after the bonding effect between the cement ring body and the sleeve pipe body and the transfer passing rate of gas, the correlation between a pressure value and the bonding damage effect is tested, on the basis of testing the pressure resistance of a testing well bore, the correlation between the bonding damage effect and the pressure of the cement ring body and the sleeve pipe body on the inner side of the testing well bore is tested, and further the testing result of the well bore integrity is perfected.
Description
Technical Field
The invention relates to a well bore integrity testing device and a testing process thereof, in particular to a well bore integrity testing device and a testing process thereof applied to the field of gas well engineering.
Background
Wellbores are a space structure that facilitates the safe and reliable flow of formation fluids from the subsurface to the surface, typically consisting of casing and outer cement sheath, for sealing off complex formations while drilling and providing a passage for the passage of oil and gas during production. Wellbore integrity, the important attributes of multi-fingered wellbore resistance to structural damage and maintenance of wellbore function, are also important safeguards for well drilling and production operations.
The specification of Chinese patent No. 201710015784.9 discloses an experimental device and a method for testing the cementing strength of a cement sheath and a sleeve, wherein the experimental device for testing the cementing strength of the cement sheath and the sleeve comprises: the cauldron body, the internal portion of cauldron includes: the simulated stratum and the clamp holder shell form a confining pressure cavity; the casing is positioned in the simulated stratum, is coaxial with the simulated stratum and is sleeved with the simulated stratum, and forms a cement ring annulus with the simulated stratum; further comprises: a cement slurry storage tank; the heating rod is arranged in the inner cavity of the sleeve; an automatic confining pressure pump connected with the confining pressure cavity; the confining pressure sensor is positioned between the confining pressure cavity and the automatic confining pressure pump; a high pressure pump; a high pressure pump pressure sensor located between the high pressure pump and the piston; a pressure block located between the piston and the sleeve; temperature sensors are inserted into the inner cavity of the sleeve and the annular space of the cement sheath; an inner pressure sensor is inserted into the inner cavity of the sleeve; the cement sheath annulus is inserted with a pressure sensor.
When the cementing strength of the cement sheath and the casing is tested, the cementing strength of the cement sheath and the casing is tested by simulating different working condition temperatures and pressure conditions, but in the actual operation process, only the data critical points of the cementing strength of the cement sheath and the casing under different conditions can be detected, but the correlation of cementing failure of the cement sheath and the casing under different conditions cannot be obtained.
Disclosure of Invention
Aiming at the prior art, the invention aims to solve the technical problems that the correlation of cement sheath and casing cementing failure under different conditions is inconvenient to test, and the reliability of data in the test process is not high.
In order to solve the problems, the invention provides a wellbore integrity testing device, which comprises a cement ring body and a sleeve pipe body positioned on the inner side of the cement ring body, wherein the outer side surface of the sleeve pipe body is in fit contact with the inner side surface of the cement ring body, a heating pipe is arranged in the sleeve pipe body, the surface of the cement ring body is covered with an anti-seepage coating, two ends of the cement ring body are respectively sleeved with a first sealing sleeve and a second sealing sleeve, sealing closure plates which are embedded with the inner wall of the sleeve pipe body are respectively arranged on the inner sides of the first sealing sleeve and the second sealing sleeve, a conveying pipe is arranged in the first sealing sleeve in a penetrating manner, the input end of the conveying pipe is connected with fluid, a plurality of hydraulic equipment are arranged on the outer side of the cement ring body in a surrounding manner, a testing frame is fixedly arranged on one side surface of the second sealing sleeve, a filling liquid disc is arranged in the second sealing sleeve, the inner bottom wall of the filling liquid disc is in penetrating connection with the bottom wall of the testing frame through a one-way pipe, liquid level sensors are respectively arranged in the inner sides of the testing frame and the filling liquid disc, sealing rings are respectively connected with sealing detectors at positions where the first sealing sleeves and the second sealing sleeves are contacted, the surface of the filling liquid disc and the end of the sealing ring body and the sealing ring body are respectively connected with the sealing ring body, and the sealing ring body is made of transparent sealing ring and the sealing ring is in a large-diameter, and the sealing ring is made of a display ring is in a sealing ring with the sealing ring, and has a large diameter, and the sealing ring is made of the sealing ring is in the sealing ring and has a large diameter, and has a display diameter and has a display sealing ring and has a display diameter and has and a display sealing ring and has a display diameter.
In the wellbore integrity testing device, on the basis of testing the pressure resistance of the testing wellbore, the correlation between the adhesive failure effect and the pressure of the cement ring body in the testing wellbore and the inner casing pipe body under different pressures can be tested, so that the testing result of wellbore integrity is improved.
As a further improvement of the application, the hydraulic device further comprises a feedback processing system, wherein the feedback processing system comprises an alarm module and a control module, one side of the cement body is connected with a processor in signal connection with the control module, and the processor is in signal connection with the hydraulic device and two liquid level sensors.
As a further improvement of the application, the inner parts of the first sealing sleeve and the second sealing sleeve are respectively provided with a sealing hoop, the surface of the sealing plugging plate in the first sealing sleeve is connected with a conical block, the diameter of one end of the conical block close to the sealing plugging plate is the same as the diameter of the sleeve body, the diameter of the other end of the conical block is smaller than the diameter of the conveying pipe, the surface of the conical block is provided with a displacement sensor, and the displacement sensor and the two liquid level sensors are connected with an alarm module through signals.
As a further development of the application, a heating coil is arranged inside the conveying pipe and is in signal connection with the heating pipe.
As a further improvement of the application, the surfaces of the two sealing plugging plates, which deviate from each other, are fixedly provided with air supply pipes with tail ends extending to the outside of the first sealing sleeve and the second sealing sleeve in a penetrating way, the surfaces of the two sealing plugging plates are provided with a plurality of pressure sensors in an embedded way, and the pressure sensors are connected with a processor through signals.
As a further improvement of the application, the inner wall of the test frame is embedded and slidingly connected with a waterproof floating plate, and the top of the waterproof floating plate is provided with a displacement sensor connected with a controller signal.
In addition to the further improvement of the application, a testing process of a well bore integrity testing device comprises the following working steps:
S1, after a sealing closure plate pair Ji Sai is put into a sleeve pipe body, a first sealing sleeve and a second sealing sleeve are respectively sleeved at two ends of a cement ring body, then an air supply pipe is used for inflating the inside of the sealing closure plate until the pressure value received by a pressure sensor on the surface of each sealing closure plate is the same, and the ends of the first sealing sleeve and the second sealing sleeve and the surface of the cement ring body are subjected to sealing and leakage-proof treatment by using a sealing hoop;
S2, applying pressure to the surface of the cement sheath by using hydraulic equipment, and detecting a force value for damaging the bonding effect between the cement sheath and the inner sleeve pipe body by extrusion;
S3, continuously increasing the pressure applied to the surface of the cement sheath body by the hydraulic equipment, and simultaneously conveying fluid heated to the same temperature value as that of the heating pipe into a gap between the first sealing sleeve and the sealing closure plate at a set flow rate by using the conveying pipe;
s4, transferring the fluid to the filling liquid disc through a gap between the cement ring body and the surface of the sleeve body, so that the liquid level in the filling liquid disc is changed;
S5, comprehensively judging the liquid level changes in the filling liquid tray and the test frame by using a liquid level sensor in the filling liquid tray test frame, and carrying out data fitting processing by using a processor in combination with the length of the cement ring body, liquid level change data and fluid flow rate to obtain the destructive degree correlation between different pressure values and the bonding degree between the cement ring body and the sleeve pipe body;
and S6, in the process, if the sealing block is impacted by fluid to displace, the accuracy of data fitting in S5 is affected, and the alarm module is started.
In summary, the application can effectively seal the two ends of the cement sheath body and the sleeve pipe body through the matching of the first sealing sleeve, the second sealing sleeve and the sealing hoop, avoid end leakage during subsequent gas transfer and influence the reliability of test data, simultaneously test the damage degree of a gap after the bonding effect between the cement sheath body and the sleeve pipe body and the transfer passing rate of gas through the matching of the hydraulic equipment, the filling liquid disc and the test frame, test the correlation between the pressure value and the bonding damage effect, and test the correlation between the bonding damage effect and the pressure of the cement sheath body and the sleeve pipe body at the inner side in the well under different pressures on the basis of the test of the pressure resistance of the well, thereby improving the test result of the integrity of the well, and monitor the sealing performance of the test device in real time through the sealing detector and the alarm module, so as to ensure the reliability of the test data and ensure the reliability of the test result.
Drawings
Fig. 1 is an overall configuration diagram of first to third embodiments of the present application.
Fig. 2 is a view showing the internal structure of a casing tube according to the first to third embodiments of the present application.
Fig. 3 is an enlarged schematic view of the application at a in fig. 2.
Fig. 4 is a diagram showing the internal structure of the test frame according to the first to third embodiments of the present application.
Fig. 5 is a schematic diagram of the transfer of gas in the first sealing sleeve to the second sealing sleeve after the bonding effect between the cement sheath body and the sleeve pipe body part of the first to third embodiments of the present application is broken.
Fig. 6 is an enlarged schematic view of the application at B in fig. 5.
Fig. 7 is a schematic view showing a state in which the seal detector detects failure of the seal band when the fluid is a gas according to the first embodiment of the present application.
Fig. 8 is a schematic view showing a state in which the seal detector detects failure of the seal band when the fluid is a liquid according to the third embodiment of the present application.
Fig. 9 is a schematic structural view of a tapered block according to the first to third embodiments of the present application.
Fig. 10 is an installation diagram of a waterproof floating plate and a displacement sensor inside a test frame according to a third embodiment of the present application.
FIG. 11 is a diagram showing a state where a gas-liquid mixture is introduced into a test frame and the gas floats on the water surface according to a third embodiment of the present application.
The reference numerals in the figures illustrate:
1. a cement sheath; 101. a sleeve body; 2. a first sealing sleeve; 3. a second sealing sleeve; 31. filling the liquid tray; 4. a hydraulic device; 5. a delivery tube; 6. an air supply pipe; 7. a test frame; 71. a liquid level sensor; 72. waterproof floating plate; 73. a displacement sensor; 8. sealing closure plate; 9. a sealing band; 10. heating pipes; 11. the detector is sealed.
Detailed Description
Three embodiments of the present application will be described in detail with reference to the accompanying drawings.
First embodiment:
Fig. 1-5 show a wellbore integrity testing device, including cement loop body 1 and the sleeve pipe body 101 that is located cement loop body 1 inboard, and the outside surface of sleeve pipe body 101 is laminated with cement loop body 1's inboard surface and is contacted, heating pipe 10 has been arranged to the inside of sleeve pipe body 101, cement loop body 1's surface is covered with the prevention of seepage coating, no. one seal cover 2 and No. two seal covers 3 have been cup jointed respectively to cement loop body 1's both ends, no. one seal cover 2 and No. two seal covers 3's inboard all install with sleeve pipe 101 inner wall jogged sealing closure plate 8, no. one seal cover 2's inside is run through and is installed conveyer pipe 5, the input of conveyer pipe 5 is connected with fluid, a plurality of hydraulic equipment 4 have been encircleed in cement loop body 1's outside, no. two seal cover 3 face-to-side surface fixed mounting who deviates from No. one seal cover 2 has test frame 7, no. two seal cover 3 is arranged filling liquid dish 31, and the inner bottom wall of filling liquid dish 31 is through the check pipe link up with test frame 7, level sensor 71 is all installed to the inside of test frame 7 and filling liquid dish 31, cement loop body 1 and No. 2 and No. 1's the sealing liquid 31's of position is all connected with sealing disk body 1's sealing body 11.
The cement body 1 is characterized by further comprising a feedback processing system, wherein the feedback processing system comprises an alarm module and a control module, one side of the cement body 1 is connected with a processor in signal connection with the control module, and the processor is in signal connection with the hydraulic equipment 4 and the two liquid level sensors 71.
Specifically, in this embodiment, the fluid is gas, that is, gas which is insoluble in water and does not react with water, including but not limited to hydrogen, nitrogen, etc., and the cement sheath 1 is in a state of being placed horizontally, and the interior of the filling liquid tray 31 is filled with liquid when the gas is conveyed in the conveying pipe 5;
in this embodiment, by checking whether the display ring at the position of the seal detector 11 bulges or not, whether the seal ring 9 fails or not can be judged quickly after the seal ring 9 fails (as shown in fig. 7);
Before testing, sleeving the first sealing sleeve 2 and the second sealing sleeve 3 on the surface of the cement body 1 to achieve the aim of plugging the two sealing plugging plates 8 into the sleeve body 101, and sealing the joint of the cement body 1, the first sealing sleeve 2 and the second sealing sleeve 3 by using the sealing hoops 9;
Then, the surface of the cement sheath body 1 is extruded by the hydraulic equipment 4, the pressure of the hydraulic equipment 4 is continuously increased, the bonding condition between the cement sheath body 1 and the sleeve pipe body 101 is detected by the hydraulic equipment 4 (at the moment, the gas in the first sealing sleeve 2 is transferred to the filling liquid disc 31 through a gap damaged by bonding, drainage treatment is carried out, so that the liquid originally discharged from the filling liquid disc 31 is transferred to the test frame 7, namely, the liquid level in the test frame 7 changes, as shown in fig. 5-6), along with the transfer of the gas to the filling liquid disc 31 through the gap, the liquid in the filling liquid disc 31 is extruded and discharged to the test frame 7, the volume of the gas entering the filling liquid disc 31 in unit time is judged according to the change of the liquid level in the test frame 7 in unit time, and compared with the gas flow rate of the set flow rate in the conveying pipe 5, the bonding damage degree between the cement sheath pipe body 1 and the sleeve pipe body 101 can be indirectly judged, and the correlation relation of the bonding damage degree under different pressures is obtained;
Recording the pressure value, gradually increasing the pressure value of the hydraulic equipment 4, judging the correlation between the pressure and the damage of the bonding action, judging the maintenance condition of the sealing action between the sleeve pipe body 101 and the cement sheath body 1 after the damage of the bonding action, testing the integrity of the complete shaft, continuing to pressurize, and detecting the compression resistance of the cement sheath body 1;
In the above process, the value of the liquid level falling in the unit time in the filling liquid tray 31 and the value of the liquid level rising in the unit time in the test frame 7 are detected, whether the difference value of the two data is within a preset threshold range (the allowable gap between the liquid discharge amounts is caused because part of liquid remains in the unidirectional pipe) is judged, if the difference value of the two liquid level change data exceeds the preset value range, the leakage phenomenon of the filling liquid tray 31 is indicated, and the alarm module is started at this time.
Fig. 9 shows that the sealing sleeves 2 and 3 are respectively provided with a sealing hoop 9, the surface of the sealing plugging plate 8 in the sealing sleeve 2 is connected with a conical block, the diameter of one end of the conical block close to the sealing plugging plate 8 is the same as the diameter of the sleeve pipe body 101, the diameter of the other end of the conical block is smaller than the pipe diameter of the conveying pipe 5, the surface of the conical block is provided with a displacement sensor, and the displacement sensor and the two liquid level sensors 71 are connected with an alarm module through signals.
Specifically, the sealing ferrule 9 is used for realizing sealing treatment between the first sealing sleeve 2 and the second sealing sleeve 3 of the cement ring body 1 and the end part, and utilizes the conical block to drain gas entering the first sealing sleeve 2, so that the impact effect on the sealing closure plate 8 at the sealing closure plate is reduced, and meanwhile, whether the sealing closure plate 8 is displaced in the monitoring process can be detected by means of the displacement sensor, so that whether the inflation space in the first sealing sleeve 2 is enlarged (if the sealing closure plate 8 is displaced, the sealing closure plate 2 can deviate from the first sealing sleeve 2 under the action of air flow), the inflation space volume in the first sealing sleeve 2 is enlarged, the diversion effect is formed at the source, and the accuracy of the subsequent correlation detection is further reduced).
A heating coil is arranged inside the conveying pipe 5, and the heating coil is in signal connection with the heating pipe 10.
Specifically, the heating coil and the heating tube 10 have the same heating temperature, and can be matched with hydraulic equipment to simulate the critical point when the bonding action of the cement sheath 1 is damaged under different temperature and pressure conditions.
The surfaces of the two sealing plugging plates 8, which deviate from each other, are fixedly and penetratingly provided with air supply pipes 6, the tail ends of which extend to the outside of the first sealing sleeve 2 and the second sealing sleeve 3, the surfaces of the two sealing plugging plates 8 are respectively embedded and provided with a plurality of pressure sensors, and the pressure sensors are respectively connected with a processor through signals.
Specifically, after the sealing and plugging plate 8 is plugged into the casing pipe body 101, the inner side of the sealing and plugging plate 8 made of rubber is inflated by the air supply pipe 6 until the pressure sensor on the surface of the sealing and plugging plate 8 detects that the extrusion value received by the pressure sensor is the same, and at the moment, the surface of the sealing and plugging plate 8 and the casing pipe body 101 are in a close contact plugging state, which indicates that the surface of the sealing and plugging plate 8 and the inner wall of the casing pipe body 101 are in a uniform sealing state.
Fig. 6 shows that the seal detector 11 comprises a display ring made of transparent elastic material, the diameter of the display ring is larger than the outer diameter of the cement ring body 1, the surface of the display ring, which is close to the cement ring body 1, is coated with water-color-changing ink, the surfaces of the display ring and the surfaces of the cement ring body 1, the first sealing sleeve 2 and the second sealing sleeve 3 are all connected through sealing rings, and the sealing rings are bonded with the first sealing sleeve 2 and the second sealing sleeve 3 through waterproof glue.
Specifically, make the surface formation one section cavity of showing circle and cement sheath body 1 through the sealing washer connection to after gas leakage, make the inflation of showing circle part, and then form the expansion package phenomenon, whether appear expanding package on the sealed detector 11 through observing, so that in time know the inefficacy information of sealed ferrule 9.
A testing process for a wellbore integrity testing apparatus, the process comprising the steps of:
S1, after a sealing closure plate 8 is aligned and plugged into a sleeve pipe body 101, a first sealing sleeve 2 and a second sealing sleeve 3 are respectively sleeved at two ends of a cement ring body 1, then an air supply pipe 6 is used for inflating the inside of the sealing closure plate 8 until the pressure value received by a pressure sensor on the surface of each sealing closure plate 8 is the same, and the end parts of the first sealing sleeve 2 and the second sealing sleeve 3 and the surface of the cement ring body 1 are subjected to sealing and leakage-proof treatment by a sealing hoop 9;
S2, applying pressure to the surface of the cement sheath body 1 by utilizing the hydraulic equipment 4, and detecting a force value for damaging the bonding effect between the cement sheath body 1 and the inner sleeve body 101 by extrusion;
S3, continuously increasing the pressure applied to the surface of the cement sheath body 1 by the hydraulic equipment 4, and simultaneously conveying fluid heated to the same temperature value as the heating temperature of the heating pipe 10 to a gap between the first sealing sleeve 2 and the sealing closure plate 8 by using the conveying pipe 5 at a set flow rate;
S4, transferring the fluid to the filling liquid disc 31 through the gap between the cement sheath body 1 and the surface of the sleeve pipe body 101, so as to change the liquid level in the filling liquid disc 31;
s5, comprehensively judging the liquid level changes in the filling liquid disc 31 and the test frame 7 by using a liquid level sensor 71 in the test frame 7 of the filling liquid disc 31, and performing data fitting processing by combining the length of the cement sheath body 1, liquid level change data and fluid flow rate by using a processor to obtain the destructive degree correlation between different pressure values and the bonding degree between the cement sheath body 1 and the sleeve pipe body 101;
And S6, in the process, if the sealing blocking plate 8 is impacted by fluid to displace, the accuracy of data fitting in S5 is affected, and the alarm module is started.
Second embodiment:
Unlike the first embodiment, in this embodiment, the fluid in the transfer pipe 5 is liquid and does not react with the liquid in the filling liquid tray 31, the liquid in the filling liquid tray 31 is not filled when the liquid is transferred in the transfer pipe 5, the cement sheath 1 is placed vertically, and the liquid level sensor 71 in the filling liquid tray 31 is placed vertically.
Specifically, after the sealing ferrule 9 fails, leaked liquid can leak from the joint of the sealing ferrule 9 and the first sealing sleeve 2 or the second sealing sleeve 3 (the subsequent data authenticity is easy to be reduced), the surface of the display ferrule, which is close to the cement sheath body 1, can be discolored (as shown in fig. 8), at the moment, the test is stopped, and the sealing ferrule 9 and the cement sheath body 1 are replaced for carrying out the experiment again, so that the accuracy of the test result is ensured;
Meanwhile, the liquid in the filling liquid disc 31 is in an unfilled state, so that the liquid conveyed from the rupture gap can be transferred into the filling liquid disc 31 for liquid level change judgment, and at the moment, the liquid level sensor 71 in the filling liquid disc 31 is placed vertically, so that the liquid level change in the filling liquid disc 31 can be conveniently detected, the unidirectional pipe is closed at the moment, the liquid in the filling liquid disc 31 is prevented from being transferred into the test frame 7 under the action of gravity, and the detection data of the liquid level sensor 71 in the filling liquid disc 31 is prevented from being disturbed;
When the liquid in the filling liquid tray 31 is full, the unidirectional pipe can be connected with the liquid pumping device, at the moment, the experiment is stopped, the pressurization, the fluid input and the heating of the equipment are stopped, at the moment, part of the liquid in the filling liquid tray 31 is pumped out by the liquid pumping device, so that the liquid level in the filling liquid tray 31 is reduced to a set value, and then the test is continued;
therefore, the device can be suitable for testing two fluids of different gases and liquids, and the applicability of the testing device is enhanced.
Third embodiment:
fig. 10-11 show that the inner wall of the test frame 7 is embedded and slidingly connected with a waterproof floating plate 72, and a displacement sensor 73 connected with a controller signal is installed on the top of the waterproof floating plate 72.
Specifically, the gas of the gas source is a substance which is insoluble in water and does not react with water at normal temperature and pressure, and when the gas is transferred into the test frame 7, the gas floats above the water surface and is located below the waterproof floating plate 72, as shown in fig. 11, b represents the gas, a represents the liquid, the waterproof floating plate 72 which can be effectively made of waterproof and gas-proof materials is intercepted in the test frame 7, the waterproof floating plate 72 and the inner wall of the test frame 7 are in a sealed sliding state (the waterproof floating plate 72 and the unidirectional pipe are in a sealed sliding connection relationship), the rising speed of the waterproof floating plate 72 in the test frame 7 is detected by the displacement sensor 73, and the damage degree of the adhesive sealing action between the cement ring body 1 and the sleeve pipe body 101 can be judged (if the damage degree is larger, the gas throughput is larger in unit time, the upward moving speed of the waterproof floating plate 72 in unit time is larger), so that the related damage of the adhesive sealing action between the cement ring body 1 and the sleeve pipe body 101 can be detected under different pressures.
Unlike the first embodiment, the present embodiment replaces the liquid level sensor 71 in the first embodiment with the waterproof floating plate 72 and the displacement sensor 73, in the first embodiment, part of the gas entering the filling liquid tray 31 will follow into the test frame 7, because the density of the gas is smaller than that of the water, which causes the gas to cover the water surface, and the liquid level change caused by the fact that the gas level sensor 71 is difficult to detect will affect the quantity of the gas actually transferred into the filling liquid tray 31 detected by the liquid level sensor 71, and the reliability of the test data will be reduced, therefore, in the present embodiment, the gas-liquid mixture entering the test frame 7 is intercepted and the relevant value is effectively tested by using the waterproof floating plate 72 and the displacement sensor 73.
In summary, through the cooperation of seal cover No. 2, no. 2 seal cover 3 and sealing ferrule 9, can carry out effectual shutoff processing to cement sheath body 1 and sleeve pipe body 101 both ends, the tip leakage takes place when avoiding follow-up gas to shift, influence the reliability of test data, simultaneously through the cooperation of hydraulic equipment 4, packing liquid dish 31 and test frame 7, the destruction degree in clearance and the gas transfer passing rate after the adhesion destruction between cement sheath body 1 and sleeve pipe body 101 are tested, with this test pressure value and adhesion destruction's correlation, on the test basis of detecting well barrel compressive capacity, the correlation between adhesion destruction and pressure is carried out to cement sheath body 1 and inboard sleeve pipe body 101 in the detection well barrel under different pressures, and then perfect the test result of well barrel integrality.
The present application is not limited to the above-described embodiments, which are adopted in connection with the actual demands, and various changes made by the person skilled in the art without departing from the spirit of the present application are still within the scope of the present application.
Claims (4)
1. The utility model provides a pit shaft integrality testing arrangement, is including cement ring body (1) and be located the inboard sleeve pipe body (101) of cement ring body (1), and the outside surface laminating contact of sleeve pipe body (101) and the inboard surface of cement ring body (1), its characterized in that: the inside of sleeve pipe body (101) has arranged heating pipe (10), the surface coating of cement ring body (1) has the prevention of seepage coating, no. one seal cover (2) and No. two seal covers (3) have been cup jointed respectively to the both ends of cement ring body (1), no. one seal cover (2) and No. two seal covers (3) inboard all install with sleeve pipe body (101) inner wall looks gomphosis seal closure plate (8), the inside of No. one seal cover (2) is run through and is installed conveyer pipe (5), the input of conveyer pipe (5) is connected with fluid, the outside of cement ring body (1) encircles and has arranged a plurality of hydraulic equipment (4), no. two seal covers (3) deviate from one side surface fixed mounting of No. one seal cover (2) have test frame (7), no. two seal covers (3) are arranged in filling dish (31), and the inner bottom wall of filling liquid dish (31) and test frame (7) are through the one-way pipe link up, the inside of test frame (7) and filling liquid dish (31) is installed liquid level sensor (71) and is connected with sealing ring body (3) in order to seal ring body (11) of sealing ring body (1) and the position of filling liquid (31), the sealing detector (11) comprises a display ring made of transparent elastic material, the diameter of the display ring is larger than the outer diameter of the cement ring body (1), the surface, close to the cement ring body (1), of the display ring is coated with water-color-changing ink, and the surface of the display ring is connected with the surfaces of the cement ring body (1), the first sealing sleeve (2) and the second sealing sleeve (3) through sealing rings;
The inner wall of the test frame (7) is embedded and slidably connected with a waterproof floating plate (72), and a displacement sensor (73) connected with a controller through signals is arranged at the top of the waterproof floating plate (72);
The inside of the first sealing sleeve (2) and the second sealing sleeve (3) are respectively provided with a sealing hoop (9), the surface of a sealing blocking plate (8) in the first sealing sleeve (2) is connected with a conical block, the diameter of one end of the conical block, which is close to the sealing blocking plate (8), is the same as the diameter of a sleeve pipe body (101), the diameter of the other end of the conical block is smaller than the pipe diameter of a conveying pipe (5), a displacement sensor is arranged on the surface of the conical block, and the displacement sensor and two liquid level sensors (71) are connected with an alarm module through signals;
The surface that two sealed closure plates (8) deviate from each other is all fixed run through and is installed tail end and extend to No. one seal cover (2) and No. two outside blast pipe (6) of seal cover (3), two the surface of sealed closure plate (8) is all inlayed and is installed a plurality of pressure sensors, and pressure sensor all is connected with the treater signal.
2. A wellbore integrity testing apparatus according to claim 1, wherein: the cement body (1) is characterized by further comprising a feedback processing system, the feedback processing system comprises an alarm module and a control module, one side of the cement body (1) is connected with a processor in signal connection with the control module, and the processor is in signal connection with the hydraulic equipment (4) and the two liquid level sensors (71).
3. A wellbore integrity testing apparatus according to claim 2, wherein: the heating coil is arranged in the conveying pipe (5), and the heating coil is in signal connection with the heating pipe (10).
4. A testing process of a wellbore integrity testing apparatus according to claim 3, comprising the following working steps:
S1, after a pair Ji Sai of sealing closure plates (8) are inserted into a sleeve pipe body (101), a first sealing sleeve (2) and a second sealing sleeve (3) are respectively sleeved at two ends of a cement ring body (1), then the interior of the sealing closure plates (8) is inflated by an air supply pipe (6) until the pressure value born by a pressure sensor on the surface of each sealing closure plate (8) is the same, and the end parts of the first sealing sleeve (2) and the second sealing sleeve (3) and the surface of the cement ring body (1) are subjected to sealing and leakage-proof treatment by a sealing hoop (9);
S2, applying pressure to the surface of the cement sheath body (1) by using hydraulic equipment (4), and detecting a force value for destroying the adhesion between the cement sheath body (1) and the inner sleeve body (101) by extrusion;
S3, continuously increasing the pressure applied to the surface of the cement sheath body (1) by the hydraulic equipment (4), and simultaneously conveying fluid heated to the same heating temperature value as the heating pipe (10) into a gap between the first sealing sleeve (2) and the sealing blocking plate (8) at a set flow rate by utilizing the conveying pipe (5);
S4, transferring the fluid to the filling liquid disc (31) through a gap between the cement ring body (1) and the surface of the sleeve pipe body (101), so as to change the liquid level in the filling liquid disc (31);
s5, comprehensively judging liquid level changes in the filling liquid disc (31) and the test frame (7) by using a liquid level sensor (71) in the test frame (7) of the filling liquid disc (31), and carrying out data fitting processing by combining the length of the cement ring body (1), liquid level change data and fluid flow rate by using a processor to obtain the correlation between different pressure values and the destructiveness of the bonding degree between the cement ring body (1) and the sleeve pipe body (101);
And S6, in the process, if the sealing blocking plate (8) is impacted by fluid to displace, the accuracy of data fitting in S5 is affected, and the alarm module is started.
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