CN110174141A - A kind of pipe-in-pipe systems mechanics and fluid flow performance test device and test method - Google Patents
A kind of pipe-in-pipe systems mechanics and fluid flow performance test device and test method Download PDFInfo
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- CN110174141A CN110174141A CN201910559766.6A CN201910559766A CN110174141A CN 110174141 A CN110174141 A CN 110174141A CN 201910559766 A CN201910559766 A CN 201910559766A CN 110174141 A CN110174141 A CN 110174141A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
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Abstract
The invention belongs to tubular buckling test simulation technical field, it is related to a kind of pipe-in-pipe systems mechanics and fluid flow performance test device and test method.Sealing welding is equipped with pilot cylinder on pedestal, passes through the outer tube crossover sub screw thread being fixedly mounted on pedestal in pilot cylinder and is equipped with outer tube, is sealed and installed with top cover by fixing bolt on the pilot cylinder at the top of outer tube, outer tube is fixedly connected by chuck with top seal；Interior pipe holder is equipped with by fixing bolt on pilot cylinder above top cover；Inner tube outer tube of the invention is provided in outer tube by there are the vibration behaviors under fluid mobility status in water impact, inner tube, and influence of the depth of pipe string combination not of the same race, the size of water flow and flow action to tubing string may be implemented, provide strong technical guarantee for deep water, ultra-deep-water tubing string operation safety.
Description
Technical field
The invention belongs to tubular buckling test simulation technical field, it is related to one kind " pipe-in-pipe systems " mechanics and fluid flows
Performance testing device and test method.
Background technique
Tubing string test is the essential link of oil exploration and exploitation, and main purpose is before oil-gas reservoir is gone into operation or first
Phase accurate evaluation deep-sea formation fluid characteristics and the potential production to brought in well.During the test, have inside test string
The flowing of hydrocarbon stratum has the impact force of water flow there are well liquid between testing tube and marine riser outside marine riser.Due in seawater
In the environment of effect, environmental load suffered by tubing string is severe, inside and outside test string by fluid matasomatism and " tube-in-tube system
Interaction force in system " between Guan Yuguan often influences the performance of tubing string, reduces tubing string service life.Therefore, carry out in sea
It is of great significance under the action of water environment load to the security implication of " pipe-in-pipe systems ".Currently, being directed to the research of this respect
Finite element is mostly used to be analyzed greatly, for the interaction between true briny environment load, oil gas load and Guan Yuguan
The research influenced on tubing string is very few, and existing experimental method cannot sufficiently simulate influence between Guan Yuguan, marine environment load
And influence of the oil gas to tubing string, effective guarantee can not be provided for " pipe-in-pipe systems " security evaluation.
Summary of the invention
It is an object of the invention to: a kind of stream that can accurately simulate fluid-load, internal tube that outer tube is subject to is provided
Effect between body effect and Guan Yuguan, by changing fluid density, outer extratubal fluid flow velocity and stream between pipe string combination, pipe
Body depth of interaction studies influence of each factor to tubular buckling behavior, and the influence of each factor is straight by data and curve
Display is seen, provides one kind " pipe-in-pipe systems " mechanics and fluid stream of strong technical support and guarantee safely for tubing string test jobs
Dynamic performance testing device and test method.
The technical scheme is that
A kind of pipe-in-pipe systems mechanics and fluid flow performance test device, including inner tube, outer tube, pilot cylinder, cylinder are intake
Pipe, leak-off pipe and pedestal, it is characterised in that: sealing welding is equipped with pilot cylinder on pedestal, passes through in pilot cylinder and is fixedly mounted on pedestal
Outer tube crossover sub screw thread outer tube is installed, top cover is sealed and installed with by fixing bolt on the pilot cylinder at the top of outer tube,
Outer tube is fixedly connected by chuck with top seal；Inner tube crossover sub is provided in outer tube crossover sub；Examination above top cover
It tests on cylinder through fixing bolt equipped with interior pipe holder；Inner tube, one end of inner tube and inner tube crossover sub spiral shell are provided in outer tube
Line connection, the other end of inner tube extend to above top cover, and the inner tube extended to above top cover is connect by pipe clamp with interior pipe holder；
Pilot cylinder side is provided with cylinder water inlet pipe, and one end of cylinder water inlet pipe is connected to pilot cylinder；Cylinder water inlet pipe it is another
End is connected to pond, and the other side of pilot cylinder is provided with leak-off pipe, and one end of leak-off pipe is connected to pilot cylinder；Leak-off pipe
The other end is connected to pond, and the pedestal lower surface is provided with water inlet pipe, one end of water inlet pipe by inner tube crossover sub with
Inner tube connection；The other end of water inlet pipe is connected to pond.
Interval is equipped with flow-rate adjustment pump B and second flowmeter on the cylinder water inlet pipe；Flow-rate adjustment pump B and second
Second flow control valve is housed on the cylinder water inlet pipe between meter.
The inner tube extended to above top cover is connected to by diversion pipe with pond.
It is arranged at intervals with multiple first fiber-optic grating sensors on the outer wall of the inner tube, is spaced and sets on the outer wall of outer tube
It is equipped with multiple second fiber-optic grating sensors.Each fiber-optic grating sensor is respectively through photoelectric converter, data collecting instrument
It is connect with computer.
Interval is equipped with first flowmeter and flow-rate adjustment pump A on the water inlet pipe, and first flowmeter and flow are adjusted
The outlet pipe pumped between A is equipped with first flow control valve.
Discharge orifice is provided on pedestal between the outer tube crossover sub and inner tube crossover sub, discharge orifice passes through outer
Pipe crossover sub is connected to outer tube.Screw thread is equipped with blocking on discharge orifice.
The test method of above-mentioned test device the following steps are included:
1) one fixed pulley, is set by mounting rack or laboratory ceiling in the top of the experimental provision first, is then determining cunning
Pulling force rope is set on wheel, and one end of pulling force rope is tied with inner tube to be connect, and the other end of pulling force rope ties an inner tube own wt 5
Thus clump weight again applies a upward pulling force (top tension) to inner tube；And intermediate fluid is full of in outer tube 2；
2) experimental provision and tie point, are checked, it is ensured that be switched on debugging after exhaustive, and the experimental provision is made to have acquisition perfect number
According to job state；
3) each fiber-optic grating sensor, is calibrated before experiment, while tune-up data being reset, in preparation for acquiring experimentation
Data；
4), starting flow-rate adjustment pump B makes then to adjust flow tune full of fluid (ocean current of simulation) between outer tube and experiment cylinder
The flow of section pump B makes the speed 0.2m/s for testing fluid in cylinder, starting flow-rate adjustment pump A adjust its flow to numerical value is set
Make the speed 1.5m/s of fluid in inner tube to numerical value is set；With the ocean current of simulation；
5) after, the ocean current wait simulate is stablized, by data measured by each fiber-optic grating sensor, (measured data include outer tube
With vibration frequency, displacement, the amplitude of inner tube etc.) handled by photoelectric converter after, be transferred to data collecting instrument and carry out data and adopt
Collection, is then communicated in computer and stores；
6), experimental data acquisition time continues 5min or more, is then shut off each fiber-optic grating sensor, closes flow-rate adjustment pump B
With flow-rate adjustment pump A；
7) after, being stored above-mentioned data, sensor and Acquisition Instrument zeros data is subjected to data next time and acquired；
8) flow-rate adjustment pump A and flow-rate adjustment pump B, is respectively started, then will be outflowed flow velocity by adjusting second flow control valve
(flow velocity in experiment cylinder) increases 0.08m/s, after flow speed stability, starts each fiber-optic grating sensor, acquires 5 on inner and outer pipe
The deformation data of a point；Data corresponding to 5 groups of difference outflow flow velocitys need to be acquired altogether；
9), by replacing the model of different outer tube and inner tube, first flow control valve is adjusted by inner tube flow velocity and increases 0.15m/
S starts each fiber-optic grating sensor after flow speed stability, carries out the acquisition of inner and outer pipe data to different pipe string combinations, needs altogether
Acquire data corresponding to 5 groups of difference inner tube flow velocitys；Record the experimental data of fiber-optic grating sensor acquisition；
10), according to live common inner and outer pipes pipe string combination, different outer tube and inner tube model are replaced, to 5 kinds of different tubing strings
Combination is tested, and is repeated the above steps 4) ~ 7), record the experimental data of fiber-optic grating sensor acquisition；
11) different diversion pipes, is replaced, the diameter of its centre bore is changed, changes length of the fluid matasomatism on tubing string, with this
Influence of the different depth of interaction of ocean current to tubing string is studied, is repeated the above steps 4) ~ 7), record fiber-optic grating sensor acquisition
Experimental data, need to carry out 5 groups of experiments in total；
12) it is wavelength of optical signal that, above-mentioned experiment, which directly measures resulting data, passes through the conversion formula of wavelength and tubing string microstrain
The strain that tubing string can be obtained, can be in the hope of the stress of tubing string, then by modal analysis method by tubing string table according to Hooke's law
The each measurement point strain signal in face acquires the dynamic respond of tubing string, then carries out Fast Fourier Transform (FFT) (FFT) to dynamic respond,
Corresponding tubing string vibratory response frequency spectrum is obtained, finally tubing string vibration frequency, stress, strain, displacement are analyzed, and then
To the mechanical behavior of " pipe-in-pipe systems " under marine environment with each factor to the affecting laws of tubing string performance.
The beneficial effects of the invention are that:
1. can simulate under outflow environment inside, " pipe-in-pipe systems " outer tube by outflow impact, in inner tube there are streaming flow with
And in the presence of the mechanical change behavior in the case of interaction between Guan Yuguan；
2. influence of the fluid density to tubing string between pipe string combination not of the same race, different pipes may be implemented；
3. influence of the outer tube under size different in flow rate, different role depth and outer tube hydrostatic(al) and fluid free situation；
It, can 4. effect of the test string by interior outer fluid can change the speed of tubing string internal flow by adjusting pump B
Accurately understand the factor for influencing tubing string performance.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is enlarged structure schematic diagram at the A in Fig. 1；
Fig. 3 is enlarged structure schematic diagram at the B in Fig. 1；
Fig. 4 is measuring system structure chart of the present invention.
In figure: 1, inner tube, 2, outer tube, 3, pilot cylinder, 4, cylinder water inlet pipe, 5, leak-off pipe, 6, pedestal, 7, outer tube conversion
Connector, 8, top cover, 9, chuck, 10, interior pipe holder, 11, water inlet pipe, 12, pond, 13, diversion pipe, 14, flow-rate adjustment pump B, 15,
Second flowmeter, 16, second flow control valve, the 17, first fiber-optic grating sensor, the 18, second fiber-optic grating sensor, 19,
First flowmeter, 20, flow-rate adjustment pump A, 21, first flow control valve, 22, discharge orifice, 23, blocking, 24, inner tube conversion connect
Head.
Specific embodiment
The pipe-in-pipe systems mechanics and fluid flow performance test device include inner tube 1, outer tube 2, pilot cylinder 3, cylinder
Water inlet pipe 4, leak-off pipe 5 and pedestal 6.Sealing welding is equipped with pilot cylinder 3 on pedestal 6, passes through in pilot cylinder 3 and is fixedly mounted on pedestal 6
7 screw thread of outer tube crossover sub outer tube 2 is installed, inner tube crossover sub 24 is provided in outer tube crossover sub 7；Outer tube conversion connects
Discharge orifice 22 is provided on pedestal 6 between first 7 and inner tube crossover sub 24, screw thread is equipped with blocking 23 on discharge orifice 22, lets out
Discharge orifice 22 is connected to by outer tube crossover sub 7 with outer tube 2.It is sealed and is installed by fixing bolt on the pilot cylinder 3 at 2 top of outer tube
There is top cover 8, outer tube 2 is sealedly and fixedly connected by chuck 9 and the lower surface of top cover 8.
Interior pipe holder 10 is equipped with by fixing bolt on the pilot cylinder 3 of 8 top of top cover；Inner tube 1 is provided in outer tube 2,
One end of inner tube 1 is threadedly coupled with inner tube crossover sub 24, wherein the lower end end of inner tube 1 extends to pedestal 6 through water inlet pipe 11
Lower end is simultaneously connected to pond 12.Interval is equipped with first flowmeter 19 and flow-rate adjustment pump A20, first flowmeter on water inlet pipe 11
Outlet pipe between flow-rate adjustment pump A is equipped with first flow control valve 21.
The other end (upper end) of inner tube 1 extends to the top of top cover 8, extend to the inner tube 1 of 8 top of top cover by pipe clamp with it is interior
Pipe holder 10 is connected and is connected to by diversion pipe 13 with pond 12, as a result, water inlet pipe 11, inner tube 1, diversion pipe 13 and pond 12
Between formed a working cycles.Multiple first fiber-optic grating sensors 17 are arranged at intervals on the outer wall of inner tube 1, outer tube 2
Multiple second fiber-optic grating sensors 18 are arranged at intervals on outer wall.First fiber-optic grating sensor 17 and the second fiber grating pass
Sensor 18 is connected through photoelectric converter, data collecting instrument and computer respectively.
3 side of pilot cylinder is provided with cylinder water inlet pipe 4, and one end of cylinder water inlet pipe 4 is connected to pilot cylinder 3；Cylinder
The other end of 4 pipes of intaking is connected to pond 12, and interval is equipped with flow-rate adjustment pump B14 and second flowmeter 15 on cylinder water inlet pipe 4；
Second flow control valve 16 is housed on the water inlet pipe between flow-rate adjustment pump B14 and second flowmeter 15.
The other side of pilot cylinder 3 is provided with leak-off pipe 5, and one end of leak-off pipe 5 is connected to pilot cylinder 3；Leak-off pipe 5
The other end is connected to pond 12.
Test method are as follows:
One fixed pulley is set by mounting rack or laboratory ceiling in the top of the experimental provision first, then on fixed pulley
Pulling force rope is set, and one end of pulling force rope is tied with inner tube 1 to be connect, and the other end of pulling force rope ties 5 times of 1 own wt of an inner tube
Clump weight, thus to inner tube 1 apply a upward pulling force (tension)；Check the experimental provision and tie point, it is ensured that nothing left
Be switched on debugging after leakage, and the experimental provision is made to have the job state of acquisition precise information；
Each fiber-optic grating sensor is calibrated before experiment, while tune-up data being reset, with the number in preparation for acquiring experimentation
According to；The inlet 24 being arranged from the top cover 8 above outer tube 2 simultaneously injects intermediate fluid and full of outer tube 2, needs replacing intermediate fluid
When, it will be under 23 rotary unloading of blocking on discharge orifice 22.
Starting flow-rate adjustment pump B14 makes then to adjust between outer tube 2 and experiment cylinder 3 full of fluid (ocean current of simulation)
The flow of flow-rate adjustment pump B14 makes the speed 0.2m/s for testing fluid in cylinder 3, starts flow-rate adjustment pump to numerical value is set
Adjusting its flow of A20 makes the speed 1.5m/s of fluid in inner tube to numerical value is set；To simulate ocean current；Ocean current to be simulated is stablized
Afterwards, by data measured by each fiber-optic grating sensor (measured data include the vibration frequency of outer tube and inner tube, displacement,
Amplitude etc.) by photoelectric converter handle after, be transferred to data collecting instrument carry out data acquisition, be then communicated in computer and store up
It deposits；
Experimental data acquisition time continues 5min or more, be then shut off each fiber-optic grating sensor, close flow-rate adjustment pump B14 and
Flow-rate adjustment pump A20；After above-mentioned data are stored, sensor and Acquisition Instrument zeros data are subjected to data next time and adopted
Collection；Flow-rate adjustment pump A20 and flow-rate adjustment pump B14 is respectively started, is then flowed outflow by adjusting second flow control valve 16
Speed increases 0.08m/s, after flow speed stability, starts each fiber-optic grating sensor, acquires the deformation data of 5 points on inner and outer pipe；
Data corresponding to 5 groups of difference outflow flow velocitys need to be acquired altogether；
By replacing the model of different outer tube 2 and inner tube 1, adjusts first flow control valve 21 and increase by 1 flow velocity of inner tube
0.15m/s starts each fiber-optic grating sensor after flow speed stability, carries out inner and outer pipe data to different pipe string combinations and adopts
Collection, need to acquire data corresponding to 5 groups of difference inner tube flow velocitys altogether；Record the experimental data of each fiber-optic grating sensor acquisition；
According to live common inner and outer pipes pipe string combination, replace different 1 models of outer tube 2 and inner tube, to 5 kinds of different pipe string combinations into
4) ~ 7 row experiment, repeats the above steps), record the experimental data of fiber-optic grating sensor acquisition.Replace different diversion pipes
13, change the diameter of its centre bore, changes length of the fluid matasomatism on tubing string, the different depth of interaction of ocean current is studied with this
4) ~ 7 influence to tubing string repeats the above steps), the experimental data of each fiber-optic grating sensor acquisition is recorded, is needed in total
Carry out 5 groups of experiments；It is wavelength of optical signal that above-mentioned experiment, which directly measures resulting data, passes through the conversion of wavelength and tubing string microstrain
The strain of tubing string can be obtained in formula, can be in the hope of the stress of tubing string, then by modal analysis method by pipe according to Hooke's law
The each measurement point strain signal in column surface acquires the dynamic respond of tubing string, then carries out Fast Fourier Transform (FFT) to dynamic respond
(FFT), corresponding tubing string vibratory response frequency spectrum is obtained, finally tubing string vibration frequency, stress, strain, displacement are analyzed,
And then the mechanical behavior of " pipe-in-pipe systems " under marine environment and each factor are obtained to the affecting laws of tubing string performance；Specifically
Are as follows:
It is wavelength of optical signal that above-mentioned experiment, which directly measures resulting data, passes through the conversion formula of wavelength and tubing string microstrain
The strain of tubing string is obtained, it can be in the hope of the stress of tubing string according to Hooke's law.
Model analysis solves dynamic respond: according to theory of structural dynamics, length is the tubing string of L, vibration displacement
It can be write as:, wherein.Due to testing tubing string both ends freely-supported, so vibration shape letter in formula
Number can be taken as SIN function, i.e.,, according in the mechanics of materials, the geometrical relationship of deformation is bent in deformation
The strain of certain point are as follows:, whereinFor the distance away from neutral line；For the curvature half of neutral line
Diameter.Therefore certain is put on column surface strain and radius of curvature relationship are as follows:；Wherein,For the radius of tubing string.By high number
It learns it is found that plane curveOn any point curvature are as follows:
Since generally all very little, line of deflection are an extremely flat curve, amount of deflection and corner number for the deformation of engineering in practice
Value all very littles.In this way, value compared with 1 smaller, can be omitted and disregard, then obtain curvature and be displaced the relationship of second dervative
Are as follows:。
It is found that the relationship of strain and displacement second dervative above comprehensive are as follows:, the strain data that will measure
Mode function can be acquired by substituting into formula, then mode function substituted into formula, can acquire
The dynamic respond of tubing string model each point.
Spectrum analysis is made to dynamic respond, Fast Fourier Transform (FFT) is carried out to the dynamic respond acquired using MATLAB software
(FFT), abscissa in image after the conversion indicates frequency, and ordinate indicates amplitude, in image there are several peak values, and
Abscissa corresponding to each peak value is the characteristic frequency of tubing string.
Each factor analyzes tubing string rumble spectrum, stress, strain, displacement, to obtain " pipe-in-pipe systems "
Mechanical behavior under marine environment is with each factor to the affecting laws of tubing string performance.
Claims (7)
1. a kind of pipe-in-pipe systems mechanics and fluid flow performance test device, including inner tube (1), outer tube (2), pilot cylinder
(3), cylinder water inlet pipe (4), leak-off pipe (5) and pedestal (6), it is characterised in that: sealing welding is equipped with pilot cylinder on pedestal (6)
(3), it is equipped with outer tube (2) in pilot cylinder (3) by outer tube crossover sub (7) screw thread being fixedly mounted on pedestal (6), outer tube (2)
It is sealed and installed with top cover (8) on the pilot cylinder (3) at top by fixing bolt, outer tube (2) passes through chuck (9) and top cover (8)
It is sealedly and fixedly connected；The pilot cylinder (3) being provided in outer tube crossover sub (7) above inner tube crossover sub (24) top cover (8)
It is upper that interior pipe holder (10) are equipped with by fixing bolt；It is provided with inner tube (1) in outer tube (2), one end of inner tube (1) and inner tube are converted
Connector (24) is threadedly coupled, and the other end of inner tube (1) extends to above top cover (8), extends to the inner tube (1) above top cover (8)
It is connect by pipe clamp with interior pipe holder (10)；Pilot cylinder (3) side is provided with cylinder water inlet pipe (4), cylinder water inlet pipe (4)
One end is connected to pilot cylinder (3)；The other end of cylinder water inlet pipe (4) is connected to pond (12), the other side of pilot cylinder (3)
It is provided with leak-off pipe (5), one end of leak-off pipe (5) is connected to pilot cylinder (3)；The other end of leak-off pipe (5) and pond (12)
Connection, the pedestal (6) lower surface are provided with water inlet pipe (11), and one end of water inlet pipe (11) passes through inner tube crossover sub (24)
It is connected to inner tube (1)；The other end of water inlet pipe (11) is connected to pond (12).
2. a kind of pipe-in-pipe systems mechanics according to claim 1 and fluid flow performance test device, it is characterised in that:
Interval is equipped with flow-rate adjustment pump B(14 on the cylinder water inlet pipe (4)) and second flowmeter (15)；Flow-rate adjustment pump B(14)
Second flow control valve (16) are housed on cylinder water inlet pipe (4) between second flowmeter (15).
3. a kind of pipe-in-pipe systems mechanics according to claim 1 and fluid flow performance test device, it is characterised in that:
The inner tube (1) extended to above top cover (8) is connected to by diversion pipe (13) with pond (12).
4. a kind of pipe-in-pipe systems mechanics according to claim 3 and fluid flow performance test device, it is characterised in that:
It is arranged at intervals with multiple first fiber-optic grating sensors (17) on the outer wall of the inner tube (1), is spaced on the outer wall of outer tube (2)
It is provided with multiple second fiber-optic grating sensors (18)；Each fiber-optic grating sensor is respectively through photoelectric converter, data
Acquisition Instrument is connect with computer.
5. a kind of pipe-in-pipe systems mechanics according to claim 1 and fluid flow performance test device, it is characterised in that:
On the water inlet pipe (11) interval first flowmeter (19) and flow-rate adjustment pump A(20 are installed), first flowmeter (19) and
Flow-rate adjustment pump A(20) between water inlet pipe (11) on be equipped with first flow control valve (21).
6. a kind of pipe-in-pipe systems mechanics according to claim 1 and fluid flow performance test device, it is characterised in that:
Discharge orifice (22), discharge orifice are provided on pedestal (6) between the outer tube crossover sub (7) and inner tube crossover sub (24)
(22) it is connected to by outer tube crossover sub (7) with outer tube (2).
7. a kind of pipe-in-pipe systems mechanics according to claim 6 and fluid flow performance test device, it is characterised in that:
Screw thread is equipped with blocking (23) on the discharge orifice (22)；
The test method of above-mentioned test device the following steps are included:
1) one fixed pulley, is set by mounting rack or laboratory ceiling in the top of the experimental provision first, is then determining cunning
Pulling force rope is set on wheel, and one end of pulling force rope is tied with inner tube to be connect, and the other end of pulling force rope ties an inner tube own wt 5
Thus clump weight again applies a upward pulling force to inner tube (1)；
2) experimental provision and tie point, are checked, it is ensured that be switched on debugging after exhaustive, and the experimental provision is made to have acquisition perfect number
According to job state；And intermediate fluid is full of in outer tube (2)；
3) each fiber-optic grating sensor, is calibrated before experiment, while tune-up data being reset, in preparation for acquiring experimentation
Data；
4), start flow-rate adjustment pump B(14) make full of fluid between outer tube (2) and experiment cylinder (3), it then adjusts flow and adjusts
Pump B(14) flow to set numerical value make test cylinder (3) in fluid speed 0.2m/s, starting flow-rate adjustment pump A(20)
Adjusting its flow makes the speed 1.5m/s of fluid in inner tube to numerical value is set；With the ocean current of simulation；
5) after, the ocean current wait simulate is stablized, after data measured by each fiber-optic grating sensor are handled by photoelectric converter,
It is transferred to data collecting instrument and carries out data acquisition, be then communicated in computer and store；
6), experimental data acquisition time continues 5min or more, is then shut off each fiber-optic grating sensor, closes flow-rate adjustment pump B
(14) and flow-rate adjustment pump A(20)；
7) after, being stored above-mentioned data, sensor and Acquisition Instrument zeros data is subjected to data next time and acquired；
8) flow-rate adjustment pump A(20, is respectively started) and flow-rate adjustment pump B(14), then by adjusting second flow control valve
(16) outflow flow velocity is increased into 0.08m/s, after flow speed stability, starts each fiber-optic grating sensor, acquires on inner and outer pipe 5
The deformation data of point；Data corresponding to 5 groups of difference outflow flow velocitys need to be acquired altogether；
9), by replacing the model of different outer tube (2) and inner tube (1), first flow control valve (21) is adjusted and flow inner tube (1)
Speed increases 0.15m/s and starts each fiber-optic grating sensor after flow speed stability, carries out inner and outer pipe number to different pipe string combinations
According to acquisition, data corresponding to 5 groups of difference inner tube (1) flow velocitys need to be acquired altogether；Record the reality of each fiber-optic grating sensor acquisition
Test data；
10), according to live common inner and outer pipes pipe string combination, different outer tube (2) and inner tube (1) model are replaced, to 5 kinds of differences
Pipe string combination tested, repeat the above steps 4) ~ step 7), records the experiment number of each fiber-optic grating sensor acquisition
According to；
11) different diversion pipes (13), is replaced, the diameter of its centre bore is changed, changes length of the fluid matasomatism on tubing string,
Influence of the different depth of interaction of ocean current to tubing string is studied with this, is repeated the above steps 4) ~ 7), record each optical fiber grating sensing
The experimental data of device acquisition, needs to carry out in total 5 groups of experiments；
12) it is wavelength of optical signal that, above-mentioned experiment, which directly measures resulting data, passes through the conversion formula of wavelength and tubing string microstrain
The strain that tubing string can be obtained, can be in the hope of the stress of tubing string, then by modal analysis method by tubing string table according to Hooke's law
The each measurement point strain signal in face acquires the dynamic respond of tubing string, then carries out Fast Fourier Transform (FFT) to dynamic respond, obtains
Corresponding tubing string vibratory response frequency spectrum, finally analyzes tubing string vibration frequency, stress, strain, displacement, and then obtain
The mechanical behavior of " pipe-in-pipe systems " under marine environment is with each factor to the affecting laws of tubing string performance.
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| CN201910559766.6A CN110174141B (en) | 2019-06-26 | 2019-06-26 | Device and method for testing mechanical and fluid flow properties of pipe-in-pipe system |
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| CN110174141B CN110174141B (en) | 2023-08-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110878691A (en) * | 2019-11-13 | 2020-03-13 | 中国海洋石油集团有限公司 | Mechanical property experiment device and method for gas production pipe column of ocean well completion |
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