CN108318346A - Borehole collapse pressure test device - Google Patents
Borehole collapse pressure test device Download PDFInfo
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- CN108318346A CN108318346A CN201810377130.5A CN201810377130A CN108318346A CN 108318346 A CN108318346 A CN 108318346A CN 201810377130 A CN201810377130 A CN 201810377130A CN 108318346 A CN108318346 A CN 108318346A
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- 238000012360 testing method Methods 0.000 title claims abstract description 84
- 230000007246 mechanism Effects 0.000 claims abstract description 79
- 239000000523 sample Substances 0.000 claims abstract description 72
- 239000011435 rock Substances 0.000 claims abstract description 67
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000002834 transmittance Methods 0.000 claims abstract description 18
- 230000001681 protective effect Effects 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 abstract description 24
- 238000002474 experimental method Methods 0.000 abstract description 10
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 239000012530 fluid Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 7
- 238000005553 drilling Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 230000008859 change Effects 0.000 description 5
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- 238000010438 heat treatment Methods 0.000 description 3
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- 230000008569 process Effects 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
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- 238000000691 measurement method Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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- 239000010959 steel Substances 0.000 description 1
- 239000004575 stone 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
-
- 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
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
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Abstract
The invention discloses borehole collapse pressure test devices, including autoclave pressure；Water conservancy diversion plug；Axial thrust mechanism；Bit andits control mechanism, the Bit andits control mechanism can the relatively described rigid bucket edge move radially, one end of the Bit andits control mechanism is located in the pressure chamber, and the other end setting of the Bit andits control mechanism is on the elasticity bucket；Temperature control device, the temperature control device are used to control the temperature in the elastic bucket；Infrared survey mechanism, the infrared survey mechanism includes the first probe being arranged on the downside of first transmittance section and is arranged on the upside of second transmittance section and corresponding second pops one's head in along longitudinal direction with first probe, and first probe and second probe can move synchronously in the horizontal direction；Angle control device.The technology can be in the experiments such as the experiment of monitoring well eye surrounding rock uniaxial loading, the experiment of rock three-axis force, creep of rock mechanical test, rock temperature varying stress load test mechanics and displacement information.
Description
Technical field
The present invention relates to Rock Mechanics Test field more particularly to a kind of borehole collapse pressure test devices.
Background technology
With going deep into for oil and gas development, drilling well vertical depth has been approached myriametre, and different well type barefoot interval length constantly increase
Add, the temperature environment of deep layer rock dramatically increases, and is even up in high temperature well drilling process mid-deep strata rock of borehole temperature
350 DEG C or more, the variation of rock temperature causes the structure of rock and mechanical characteristic that can change, therefore accurate understanding temperature becomes
Change the affecting laws that rock mechanics and damage are broken with ring mechanism, under differentiation and prediction wall strength, the especially condition of high temperature
Borehole wall stability has important practical significance to safety drilling engineering.
Caving pressure measure method it is more, such as indoor measurement, using calculus of finite differences calculate, finite element prediction, but mostly
It is not intended to oil field deep stratum, perfect there is presently no one kind particularly with deep layer buried depth high-temperature stratum and continuous test side
Method, main cause are as follows：1, for superficial part low temperature formation, it disclosure satisfy that the physical property of rock is joined using traditional mechanical test mode
Several measurement, and method is ripe, the mechanical tests method such as the direct generally use single shaft of data acquisition, three axis；2, with high temperature height
The exploitation of kill-job, the influence aggravation of high-temperature, high pressure collective effect to petrophysical parameter, single temperature or confining pressure environment
Simulation cannot accurately simulate required environment；3, temperature, confining pressure are shaped as to the test system of complete set with optics test set
System, higher integrated level is required in links such as pressure chamber, optic probes.
Therefore, therefore the simple and direct indoor measurement method and device of a set of economy of research is solution deep layer high temperature well drilling shaft lining
Stablize the task of top priority of mechanics study.
Invention content
In order to overcome the drawbacks described above of the prior art, technical problem to be solved by the invention is to provide a kind of borehole collapses
Pressure test device, this is simple in structure intuitive, easy to operate, and different well type borehole mechanics under warm change state may be implemented and tested
The synchronous acquisition of optical signalling in journey, and realize the identifying processing of signal and the tracking and testing of creeping displacement, and then obtain wellbore
Specific displacement information of the rock temperature to caving pressure.
The specific technical solution of the present invention is：A kind of borehole collapse pressure test device, including：
Autoclave pressure, the autoclave pressure include pressure chamber and test chamber, and the test chamber includes being located in the pressure chamber
Rigid bucket and in the rigid bucket and the elastic bucket that can radially deform upon；
The lower part in the elastic bucket is arranged in water conservancy diversion plug, the water conservancy diversion plug, and so that rock is accommodating, the water conservancy diversion is stifled
Head has the first transmittance section；
Axial thrust mechanism, the relatively described water conservancy diversion plug of the axial thrust mechanism are located at the upside of rock, the axial direction
Thrust mechanism can autoclave pressure movement relatively, the axial thrust mechanism be located at one end in autoclave pressure be provided with can with it is described
The deflector of pressure chamber and test chamber engagement, the deflector includes can be in itself and the pressure chamber and the test
The seepage channel that will be connected between the pressure chamber and the elastic bucket when chamber engages, the deflector have the second light transmission
Portion；
Bit andits control mechanism, the Bit andits control mechanism can the relatively described rigid bucket edge move radially, the Bit andits control
One end of mechanism is located in the pressure chamber, and the other end setting of the Bit andits control mechanism is on the elastic bucket；
Temperature control device, the temperature control device are used to control the temperature in the elastic bucket；
Infrared survey mechanism, the infrared survey mechanism include be arranged on the downside of first transmittance section first probe and
It is arranged on the upside of second transmittance section and corresponding second pops one's head in along longitudinal direction with first probe, first probe and institute
Stating the second probe can move synchronously in the horizontal direction；
Angle control device, the angle control device can be such that the autoclave pressure rotates, so that the autoclave pressure is with respect to water
Plane is in angle.
Preferably, the autoclave pressure includes upper cover, and the axial thrust mechanism includes axial loading device, can be with the axis
It is sequentially connected to loading device and wears distance rod on the cover, the distance rod is located at one end in the autoclave pressure
It is fixedly installed the seal cover board sealed with the upper cover, the deflector includes that can match to merge to have with the elastic bucket to ooze
The seepage flow plug of circulation road, the seepage flow connector being arranged on the seepage flow plug, the diversion trench of the seepage flow connector are oozed with described
The seepage channel connection of plug is flowed, the seepage channel is connected to elastic barrel cavity, and the diversion trench is connected to pressure chamber.
Preferably, the seepage flow plug is provided with protective cover at it away from the side of rock, and the protective cover is located at institute
It states the first probe or the second probe is outer.
Preferably, the pressure chamber has bottom wall, and the drain plug being connected to the pressure chamber, institute are provided on the bottom wall
Diversion pipe is stated to be threaded through on the bottom wall.
Preferably, the temperature control device includes the heater upwardly extended from the water conservancy diversion plug.
Preferably, there is sealed chamber, first probe or the second probe between the water conservancy diversion plug and the bottom wall
It is arranged in the sealed chamber.
Preferably, the seepage flow interface is provided with multiple water conservancy diversion along the circumferential direction arranged at it towards the side of rock
Slot, each diversion trench are connected to seepage channel.
Preferably, including control unit, described control unit are used for axial thrust mechanism, Bit andits control mechanism, temperature
Control mechanism, infrared survey mechanism are controlled.
Preferably, second transmittance section is radially positioned between the seepage flow plug and the seepage flow connector.
Advantages of the present invention：It makes up existing rock mechanics test device and is unable to measure rock alternating temperature to intensity effect
Deficiency fills up the blank of borehole collapse pressure test, a kind of cave in pressure of the test rock of innovation research and development under different temperatures variation
Force test device, influence of the test temperature to high pressure rock strength, the especially influence to wellbore rock fall pressure, into
And underground wall strength is predicted and evaluates, provide guidance foundation for the wellbore stability prediction of oil/gas deep well, ultradeep well and high temperature well.
The technology can the experiment of monitoring well eye surrounding rock uniaxial loading, the experiment of rock three-axis force, creep of rock mechanical test, rock temperature
Mechanics in the experiments such as varying stress load test and displacement information.
Description of the drawings
Attached drawing described here is only used for task of explanation, and is not intended to limit model disclosed by the invention in any way
It encloses.In addition, the shape and proportional sizes etc. of each component in figure are only schematical, it is used to help the understanding of the present invention, and
It is not the specific shape and proportional sizes for limiting each component of the present invention.Those skilled in the art under the teachings of the present invention, can
Implement the present invention to select various possible shapes and proportional sizes as the case may be.
Fig. 1 is the structural schematic diagram according to the borehole collapse pressure test device of the embodiment of the present invention.
Fig. 2 is the upward view of axial thrust mechanism；
Fig. 3 is the schematic cross-section of Fig. 2；
Fig. 4 is the vertical view of autoclave pressure；
Fig. 5 is the sectional view of Fig. 4；
Fig. 6 is the structural schematic diagram of a guiding mechanism part.
Fig. 7 is the structural schematic diagram of guiding mechanism another part.
Fig. 8 is rock forces testing schematic diagram.
The reference numeral of the figures above：1- autoclave pressures；2- axial thrusts mechanism；3- infrared surveys mechanism；4- guiding mechanisms；
401- bearings；402- guide rails；403- probe clamping devices；404- motors；405- gear drives；5- pitch angle controls mechanism；
51- flanged joint seats；52- console pedestals；53- supporting rods；54- fluid pressure drive devices；55- leading screws；56- hydraulic control boxs；
6- temperature control devices；7- control units；201- axial loading devices；202- sealing devices；203- upper covers；204- seepage flow is stifled
Head；The second transmittance sections 205-；206- seepage flow interfaces；207- seal cover boards；208- seepage channels；209- protective covers；301- second
Probe；303- interfaces；101- pressure chambers；102- test chambers；103- Bit andits controls mechanism；104- water conservancy diversion plugs；105- first is saturating
Light portion；106- first pops one's head in；107- drain plugs；108- rigidity buckets；109- elasticity buckets；110- heaters.
Specific implementation mode
With reference to the drawings and the description of the specific embodiments of the present invention, the details of the present invention can clearly be understood.But
It is the specific implementation mode of invention described herein, is only used for explaining the purpose of the present invention, and cannot understands in any way
At being limitation of the present invention.Under the teachings of the present invention, technical staff is contemplated that the arbitrary possible change based on the present invention
Shape, these are regarded as belonging to the scope of the present invention.
Referring to Fig.1, shown in Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, the borehole collapse pressure in the embodiment of the present application is surveyed
Trial assembly set including：Autoclave pressure 1, the autoclave pressure 1 include pressure chamber 101 and test chamber 102, and the test chamber 102 includes position
In in the pressure chamber 101 rigid bucket 108 and in the rigid bucket 108 and the elastic bucket that can radially deform upon
109；Water conservancy diversion plug 104, the lower part in the elastic bucket 109 is arranged in the water conservancy diversion plug 104, described so that rock is accommodating
Water conservancy diversion plug 104 has the first transmittance section 105；Axial thrust mechanism 2, the relatively described water conservancy diversion plug of the axial thrust mechanism 2
104 are located at the upside of rock, and the axial thrust mechanism 2 autoclave pressure 1 can move relatively, 2, the axial thrust mechanism
The deflector that can be engaged with the pressure chamber 101 and the test chamber 102 is provided in one end in autoclave pressure 1, it is described to lead
Stream mechanism includes can be when the seepage flow plug 204 be engaged with the pressure chamber 101 and the test chamber 102 by the pressure chamber
The seepage channel 208 being connected between 101 and the elastic bucket 109, the deflector have the second transmittance section 205；Displacement control
Mechanism 103 processed, the Bit andits control mechanism 103 the rigid bucket 108 can move radially relatively, the Bit andits control mechanism
103 one end is located in the pressure chamber 101, and the other end setting of the Bit andits control mechanism 103 is in the elastic bucket 109
On；Temperature control device 6, the temperature control device 6 are used to control the temperature in the elastic bucket 109；Infrared survey
Measuring mechanism 3, the infrared survey mechanism 3 include being arranged to exist in the first probe 106 of first transmittance section, 105 downside and setting
The upside of second transmittance section 205 and with first probe 106 corresponding second probe 301 along longitudinal direction, first probe
106 and second probe 301 can move synchronously in the horizontal direction.
By above structure, the fluid entered from pressure chamber 101 can enter from the seepage channel 208 of seepage flow plug 204
Elastic bucket 109, the fluid in pressure chamber 101 can provide elastic bucket 109 radial effect by Bit andits control mechanism 103
Power can provide rock axial active force into the fluid in elastic bucket 109, and temperature control device 6 can be according to temperature
Sensor controls the temperature of the fluid in elastic bucket 109, has thus constructed the high temperature and pressure structure of rock.And
And infrared survey mechanism 3 can also measure the rock in elastic bucket 109.
With reference to shown in Fig. 4 and Fig. 5, specifically, autoclave pressure 1 includes pressure chamber 101 and test chamber 102.Pressure chamber 101 has
Roof and bottom wall.The roof of pressure chamber 101 passes through flanged joint upper cover 203.The bottom wall of pressure chamber 101 by flange can with incline
Angle control mechanism 5 connects.Including angle control device, the angle control device can be such that the autoclave pressure 1 rotates, so that described
1 relative level of autoclave pressure is in angle.Specifically, pitch angle control mechanism 5 includes flanged joint seat 51, console pedestal 52, branch
Strut 53, fluid pressure drive device 54 (for example, jack), leading screw 55, hydraulic control box 56, the hydraulic control box 56 can be to liquid
The control of hydraulic driver 54 makes it extend or shrink.Flanged joint seat 51 is fixed on pressure chamber 101.The one of supporting rod 53
End is fixed on console pedestal 52, and the other end and flanged joint seat 51 of supporting rod 53 are hinged.Fluid pressure drive device 54
It can make flanged joint seat 51 that pressure chamber 101 be driven to be rotated relative to supporting rod 53, to form angle with horizontal plane.Leading screw 55 is arranged
Between flanged joint seat 51 and console pedestal 52, for when fluid pressure drive device 54 runs to precalculated position, by pressure
Chamber 101 is fixed.The drain plug 107 being connected to the pressure chamber 101 is additionally provided on the bottom wall of pressure chamber 101.
Test chamber 102 is located in pressure chamber 101.Test chamber 102 includes the rigid bucket 108 positioned at outside (for example, by steel knot
It is configured to) and elastic bucket 109 (for example, being made of high deformable metal) positioned inside.Wherein, rigid bucket 108 is solid by pin
It is scheduled on the bottom wall of pressure chamber 101.Elastic bucket 109 can be deformed upon radially.
The lower part of elastic bucket 109 is provided with water conservancy diversion plug 104.Rock can be placed on water conservancy diversion plug 104, and be located at
In elastic bucket 109.The diversion pipe being connected to elastic bucket 109 is provided on the water conservancy diversion plug 104 and the bottom wall.The water conservancy diversion
The fluid in elastic bucket 109 can be discharged for pipe.
Shown in referring to Fig.1, the Bit andits control mechanism 103 the rigid bucket 108 can move radially relatively, the displacement
One end of control mechanism 103 is located in the pressure chamber 101, and the other end of the Bit andits control mechanism 103 is arranged in the bullet
On property bucket 109.Fluid in pressure chamber 101 can be radial to be generated to elastic bucket 109 by Bit andits control mechanism 103
Active force, to make the deformation of the generation of elastic bucket 109 radially.The Bit andits control mechanism 103 further includes that can detect elastic bucket
The displacement sensor of the 109 radially amounts of deforming upon.
With reference to shown in Fig. 2 and Fig. 3, the axial thrust mechanism 2 includes axial loading device 201, can add with the axial direction
The distance rod set 201 drive connections and be threaded through in the upper cover 203 is carried, the distance rod is located in the autoclave pressure 1
One end is fixedly installed the seal cover board 207 sealed with the upper cover 203, and the deflector includes seepage flow plug 204 and oozes
Flow connector.Seepage flow interface 206 is bolted in seepage flow plug 204, and seepage flow interface 206 is bolted on seal cover board
On 207.The sealing device 202 that upper cover 203 can be made to seal is provided on the distance rod.
Seepage flow interface 206 can be with the top of elastic bucket 109 with the top fitted seal of pressure chamber 101, seepage flow plug 204
Sealing cooperation.The seepage flow interface 206 is provided with multiple diversion trenches along the circumferential direction arranged at it towards the side of rock, respectively
A diversion trench is connected to seepage channel 208.The seepage channel 208 be connected to elastic 109 inner cavity of bucket, the diversion trench and
Pressure chamber 101 is connected to.The distance rod of the axial thrust mechanism 2 autoclave pressure 1 can move relatively, make the pressure chamber 101
It is connected to the elastic bucket 109.
Shown in referring to Fig.1, in the present embodiment, the temperature control device 6 may include from the water conservancy diversion plug 104
Heater 110, temperature sensor, temperature indicator, signal output interface 303, resistance control valve for upwardly extending etc..It can pass through
Regulation resistance control valve controls the temperature of 109 internal flow of elastic bucket.The temperature control device 6 of the embodiment of the present application further includes
The temperature sensor being installed in the seepage channel 208 of axial thrust mechanism 2.Control unit 7 respectively with signal output interface 303
It is connected with temperature indicator, control resistance controls valve position, adjusts the size of adding thermal resistance, storage temperature data, display is currently
Temperature value.
In the present embodiment, the seepage flow plug 204 is provided with protective cover 209 at it away from the side of rock, described
Protective cover 209 is located at outside the infrared survey mechanism 3.Chamber is formed between the water conservancy diversion plug 104 and the bottom wall, it is described
Infrared survey mechanism 3 is arranged in the chamber.
Shown in referring to Fig.1, the first probe 106 is arranged in the downside of the first transmittance section 105.Second probe, 301 setting is the
The upside of two transmittance sections 205.Wherein, the first probe 106 and the second probe 301 are correspondingly arranged along longitudinal direction.In the present embodiment,
First probe 106 and the second probe 301 are respectively four.Of course, in other optional embodiments, the first 106 Hes of probe
The quantity of second probe 301 can be other correspondences.
Shown in referring to figure 6 and figure 7, the infrared survey mechanism 3 further includes guiding mechanism 4, and guiding mechanism 4 includes guide rail
402, it can be movably arranged at probe clamping device 403 on the guide rail 402 along the extending direction of guide rail 402, there is output
The motor 404 of axis, probe clamping device 403 can clamp the first probe 106 or second probe 301, the output shaft of motor 404
It can be engaged by gear drive 405 with probe clamping device 403, to drive the first probe 106 or the second probe 301
It is moved along guide rail 402.Preferably, each guide rail 402 can be arranged on a bearing 401 in a ring.
The embodiment of the present application further includes control unit 7, and described control unit 7 is used for axial thrust mechanism 2, Bit andits control
Mechanism 103, temperature control device 6, infrared survey mechanism 3 are controlled.Specifically, described control unit 7 is received including signal
And conversion chunking, computer, processing software, temperature in test process, pressure, displacement, infrared probe and the survey at inclination angle can be implemented
Amount and control.
The object of the invention to solve the technical problems can be used following technical measures and further realize.
Wherein, test probe radial displacement control device branch is in rock mechanics pressure chamber 101 and axial thrust mechanism 2
Interior, synchronous shift, each test probe radial displacement occur for the gear train assembly in test probe radial displacement control device
4 (being not limited to 4) infrared probes are installed on control device.
Wherein, entire test device is sealing container, and medium is not limited to water in fluid reservoir.
The present invention is achieved by the following technical solutions:
A kind of caving pressure test method for testing rock under different temperatures variation, step are：
Step 1：Wellbore rock is fabricated to annular shape according to the installation dimension of test chamber 102, is installed in test chamber 102
Portion, 102 bottom end of test chamber are equipped with glass film plates, seepage flow plug 204, test probe radial displacement control device, infrared ray and connect
Receive probe and heating system；2 lower end of axial thrust mechanism is equipped with seepage flow plug 204 and glass cover-plate, infrared emitting probe
Radial displacement control device, infrared emitting probe and temperature test probe be fixed on glass cover-plate and upper cover 203 form it is close
It seals in region；Test probe radial displacement control device can realize infrared ray test probe along 101 radial direction of rock pressure chamber
Mobile, test probe radial displacement control device is bolted with infrared ray testing pressure head；Axial thrust mechanism 2 can apply
Axial thrust, and generate axial displacement；Test chamber 102 uses expanding material, can transmit 101 fluid pressure of pressure chamber, to test
Chamber 102 generates axial compressive force；Rock Mechanics Test machine sealed base is installed on by flange on pitch angle control platform, realizes different wells
The test request at eye inclination angle；
Step 2：Adjust infrared emitting probe and receiving transducer position, meet infrared emitting probe send out it is infrared
Line beam can be close to wellbore rock inner ring wall surface, and not stopped, infrared receiver probe can clearly receive signal；
Step 3：Adjust the inclination angle of pitch angle control platform；Temperature test and control device are adjusted, liquid storage pot liquid is heated
Reach predetermined temperature value, the radial position X1 that record test probe radial displacement control device is shown；
Step 4：Wellbore rock carries out blower operations, liquid is pumped into drain plug 107 by liquid feeding pump, by pressure chamber
Pressure increases to predetermined pressure in 101, waits for that the probe of the temperature test in upper cover 203 reaches equilibrium temperature, record test probe is radial
The radial position X2 that displacement control device is shown；
Step 5：It adjusts the internal heater 110 inside Rock Mechanics Test machine pressure chamber 101 and heats interior media, make survey
Temperature reaches predetermined temperature T1 in examination chamber 102, and in the whole process, infrared emitting probe is swashed with time excitation cycle T interval
Hair, temperature increase wellbore rock and undergauge occur, and infrared receiver, which is popped one's head in, is blocked no signal, in upper and lower two cavities seals pressure head
Test probe radial displacement control device occurs automatic adjustment and is adjusted in synchronism, and is moved to wellbore center position, each moving displacement
Δ S, after I time is mobile, infrared receiver probe receives infrared signal, stops movement, record displacement S1=I Δs S；After
Continuous heating, it is same to record displacement S2, S3 ..., SN。
Test procedure provided in this embodiment is as follows：
(1) wellbore rock is fabricated to the loop configuration of wellbore according to testing requirement, is put into rock pressure chamber 101.
(2) pitch angle control platform setting angle of inclination is modulated to fix.
(3) heating furnace will be adjusted, medium in outlet tube is heated and opens confining pressure feed liquor system to set temperature.
(4) infrared ray on test probe radial displacement control device is adjusted by the synchronous acquisition of data and processing system to visit
The position of head ensures that infrared-ray is not stopped by rock side wall, and is close to rock side wall, records probe positions.
(5) it pressurizes.
(6) equally, the position of infrared probe is adjusted, ensures that infrared-ray is not stopped by rock side wall, and be close to rock
Side wall records probe positions.
(7) it is heated.
(8) equally, the position of infrared probe is adjusted, ensures that infrared-ray is not stopped by rock side wall, and be close to rock
Side wall records probe positions.
(9) it after testing, drains the oil.
(10) triaxial chamber is opened, device is taken out into testing stand, engineering liquid is discharged.
With reference to shown in Fig. 8, advantages of the present invention：It makes up existing rock mechanics test device and is unable to measure rock alternating temperature
To the deficiency of intensity effect, the blank of borehole collapse pressure test is filled up, a kind of test rock of innovation research and development becomes in different temperatures
Caving pressure test device under changing, influence of the test temperature to high pressure rock strength, especially to wellbore rock fall
The influence of pressure, and then underground wall strength is predicted and evaluates, it is that the wellbore stability of oil/gas deep well, ultradeep well and high temperature well is predicted
Foundation is instructed in offer.The technology can the experiment of monitoring well eye surrounding rock uniaxial loading, the experiment of rock three-axis force, creep of rock power
Learn the mechanics and displacement information in the experiments such as experiment, rock temperature varying stress load test.
Present invention may apply to the Simultaneous Monitorings of rock fall pressure under temperature constant state, while suitable for well-drilling borehole week
Caving pressure synchro measure of the country rock stone under different temperatures and pressure environment, while being suitable for different well type (straight well, level
Well, directional well) caving pressure synchro measure of the wellbore rock under different temperatures and pressure environment, high temperature height can be solved
The stability prediction of well-drilling borehole under pressure condition.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with
The difference of other embodiment, the same or similar parts between the embodiments can be referred to each other.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all according to the present invention
Equivalent change or modification made by Spirit Essence, should be covered by the protection scope of the present invention.
Claims (9)
1. a kind of borehole collapse pressure test device, which is characterized in that including：
Autoclave pressure, the autoclave pressure include pressure chamber and test chamber, and the test chamber includes rigid in the pressure chamber
Property bucket and in the rigid bucket and the elastic bucket that can radially deform upon；
Water conservancy diversion plug, the lower part in the elastic bucket is arranged in the water conservancy diversion plug, so that rock is accommodating, the water conservancy diversion plug tool
There is the first transmittance section；
Axial thrust mechanism, the relatively described water conservancy diversion plug of the axial thrust mechanism are located at the upside of rock, the axial thrust
Mechanism can autoclave pressure movement relatively, the axial thrust mechanism is located at that one end in autoclave pressure is provided with can be with the pressure
The deflector of chamber and test chamber engagement, the deflector include that can be connect in itself and the pressure chamber and the test chamber
The seepage channel that will be connected between the pressure chamber and the elastic bucket when conjunction, the deflector have the second transmittance section；
Bit andits control mechanism, the Bit andits control mechanism can the relatively described rigid bucket edge move radially, the Bit andits control mechanism
One end be located in the pressure chamber, the setting of the other end of the Bit andits control mechanism is on the elastic bucket；
Temperature control device, the temperature control device are used to control the temperature in the elastic bucket；
Infrared survey mechanism, the infrared survey mechanism include the first probe being arranged on the downside of first transmittance section and setting
On the upside of second transmittance section and with first probe corresponding second probe along longitudinal direction, first probe and described the
Two probes can move synchronously in the horizontal direction；
Angle control device, the angle control device can be such that the autoclave pressure rotates, so that the autoclave pressure relative level
In angle.
2. borehole collapse pressure test device according to claim 1, which is characterized in that the autoclave pressure includes upper cover,
The axial thrust mechanism includes axial loading device, can be sequentially connected with the axial loading device and be threaded through the upper cover
On distance rod, one end that the distance rod is located in the autoclave pressure is fixedly installed the sealing cover sealed with the upper cover
Plate, the deflector include that can match merge the seepage flow plug with seepage channel, be arranged in the seepage flow with the elastic bucket
Seepage flow connector on plug, the diversion trench of the seepage flow connector are connected to the seepage channel of the seepage flow plug, and the seepage flow is logical
Road is connected to elastic barrel cavity, and the diversion trench is connected to pressure chamber.
3. borehole collapse pressure test device according to claim 1, which is characterized in that the seepage flow plug deviates from it
The side of rock is provided with protective cover, and the protective cover is located at first probe or the second probe is outer.
4. borehole collapse pressure test device according to claim 1, which is characterized in that the pressure chamber has bottom wall,
The drain plug being connected to the pressure chamber is provided on the bottom wall, the diversion pipe is threaded through on the bottom wall.
5. borehole collapse pressure test device according to claim 1, which is characterized in that the temperature control device includes
The heater upwardly extended from the water conservancy diversion plug.
6. borehole collapse pressure test device according to claim 4, which is characterized in that the water conservancy diversion plug and the bottom
There is sealed chamber, first probe or the second probe to be arranged between wall in the sealed chamber.
7. borehole collapse pressure test device according to claim 1, which is characterized in that the seepage flow interface is in its direction
The side of rock is provided with multiple diversion trenches along the circumferential direction arranged, and each diversion trench is connected to seepage channel.
8. borehole collapse pressure test device according to claim 1, which is characterized in that including control unit, the control
Unit processed is for controlling axial thrust mechanism, Bit andits control mechanism, temperature control device, infrared survey mechanism.
9. borehole collapse pressure test device according to claim 2, which is characterized in that second transmittance section is radially
Between the seepage flow plug and the seepage flow connector.
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| CN201810377130.5A CN108318346B (en) | 2018-04-25 | 2018-04-25 | Borehole collapse pressure testing device |
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| CN201810377130.5A CN108318346B (en) | 2018-04-25 | 2018-04-25 | Borehole collapse pressure testing device |
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| CN108318346B (en) | 2024-02-02 |
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