CN107916922A - Underground fish detection method and its device based on array-type flexible pressure sensor - Google Patents
Underground fish detection method and its device based on array-type flexible pressure sensor Download PDFInfo
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- CN107916922A CN107916922A CN201711428539.7A CN201711428539A CN107916922A CN 107916922 A CN107916922 A CN 107916922A CN 201711428539 A CN201711428539 A CN 201711428539A CN 107916922 A CN107916922 A CN 107916922A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/09—Locating or determining the position of objects in boreholes or wells, e.g. the position of an extending arm; Identifying the free or blocked portions of pipes
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
Abstract
The present invention relates to a kind of underground fish detection method and its device based on array-type flexible pressure sensor, belong to the technical field of oil well repairing operation.Weight lower part is connected by attachment device with the vertical transmission mechanism in underground, down-hole horizontal transmission mechanism is fixedly connected with the enclosure interior of the vertical transmission mechanism in underground, the vertical transmission mechanism lower part in underground is connected with array-type flexible pressure sensing probe, and logging cable is connected with weight top and passes through the vertical transmission mechanism in underground to pop one's head in array-type flexible pressure sensing and connects.Advantage is structure novelty, and decentralization with above carrying is realized by cable, with the underground work cycle is short, saves time and cost of labor；Contact measurement is carried out with top of fish by array-type flexible pressure sensing probe, using piezoresistive cantilever beam sensor array, and is embedded it in the dielectric resilience film of polyimides, reliability is high, compact-sized, easy to operate.
Description
Technical field
The invention belongs to the technical field of oil well repairing operation, more particularly to a kind of underground fish detection method and device,
Specifically a kind of underground fish detection method and device based on array-type flexible pressure sensor.
Background technology
The oil-water well produced every year is caused oil well to stop production, is damaged due to underground fish, or the casing-broken caused by rock fracture
Lose serious.Therefore need to salvage the production that the workover treatments such as unfreezing recover oil well, wherein fish or bad break sleeve to underground
The detection of shape position is a primary crucial step with identification, its accuracy of detection provides important guarantor for the success rate of follow-up workover treatment
Barrier.
Traditional lead stamp that method currently used for the detection of underground fish mainly has contact prints, ultrasonic imaging detection,
Downhole BTV.The method of traditional lead stamp printing：Plastic deformation occurs due to pressurizeing to contact with top of fish by lead stamp,
Pressurization printing can only print once, it is impossible to duplicate printing；Lead stamp is conveyed by the drill string or tubing string of connection, the operation removed
Cycle is grown, and efficiency is low, adds time cost of labor.Underground video method：Since medium is complicated and changeable in well, crude oil, impurity,
The mixtures such as mud cause acoustic attenuation, and influence detection of the camera lens to fish, and cost is higher.Ultrasonic imaging detects：Due to
Ultrasonic probe needs constantly regulate probe and the vertical distance and rotation angle of top of fish to carry out point-by-point transmitting and receiving signal, really
The whole appearance profile of the signal covering top of fish of collection is protected, therefore detection efficient is relatively low, equipment is complicated and required precision is high, cost
Height is not high by medium in well and electromagnetic interference imaging precision.
Technical method and the equipment applied to the detection of underground fish are in detection precision at present in summary, operating efficiency,
All there is limitation and deficiency in operation difficulty and cost.
The content of the invention
The present invention provides a kind of underground fish detection method and its device based on array-type flexible pressure sensor, with solution
The problem of fish recognition accuracy that certainly presently, there are is not high, and detect operation efficiency is low, and opertions engineering amount is big.
The present invention adopts the technical scheme that, a kind of underground fish detection side based on array-type flexible pressure sensor
Method, comprises the following steps：
Step 1：Array-type flexible pressure sensing is transferred by logging cable to pop one's head in above fish；
Step 2：Driving Stepping Motor drives disc cam transmission mechanism, the uniformly distributed follower lever of controlled level face inner circumferential
Radial motion completes guiding and the fixation of detection device to internal surface of sleeve pipe；
Step 3：Linear motor is driven to drive drive link, the axial movement of control array-type flexible pressure sensing probe is complete
Into contact of the power transmission protection contact with top of fish, using draw oily passage and cavity structure realize it is quiet inside and outside underground power transmission protection contact
Self-balancing is pressed, and top of fish contact displacement information is obtained by piezoresistive cantilever beam sensor array；
Step 4：The resistance variations signal that pressure drag film is gathered carries out conditioning conversion, by cable transmission to host computer,
Realize the high accuracy imaging and identification of fish position and profile.
During transferring pressure sensing detection device in step 1 of the present invention, when array-type flexible pressure sensing is popped one's head in
Touch top of fish, contact condition can be hampered by the increase suddenly of imaging pressure data and cable decentralization for being transmitted to host computer into
Row judges, stops cable decentralization operation, then above carries 10~20cm of detection device.
In step 2 of the present invention by step motor control circumferentially be evenly distributed with follower lever radial stroke, righting housing,
And it is fixed in internal surface of sleeve pipe；Wherein driven boom end be hemispherical corrosion-and high-temp-resistant rubber, the curvature and set of hemisphere
Inside pipe wall curvature is consistent, to increase the contact area of driven boom end and internal surface of sleeve pipe, increases the friction of end and internal surface of sleeve pipe.
In step 4 of the present invention：Real time imagery is detected to underground fish by software by host computer on well, to obtain
The top of fish image-forming information of more high accurancy and precision, can lift detection device, and adjustment array-type flexible pressure sensing probe connects with top of fish
Speed is touched, carries out secondary contact imaging, repeats aforesaid operations, until the error of the continuous fish position obtained three times and profile exists
Within the scope of permission, then it is compared with existing workover treatment correlation technique data, completes the identification of underground fish.
A kind of underground fish detection device based on array-type flexible pressure sensor：Weight lower part passes through attachment device
It is connected with the vertical transmission mechanism in underground, down-hole horizontal transmission mechanism is fixedly connected with the enclosure interior of the vertical transmission mechanism in underground,
The vertical transmission mechanism lower part in underground is connected with array-type flexible pressure sensing probe, and logging cable is connected, simultaneously with weight top
Connected through the vertical transmission mechanism in underground and array-type flexible pressure sensing probe.
The structure of the vertical transmission mechanism in underground of the present invention is：Linear motor is fixed in housing, linear motor output
Axis is connected through a screw thread with drive link, and end and the array-type flexible pressure sensing probe of drive link weld.
The structure of down-hole horizontal transmission mechanism of the present invention is：Stepper motor is fixed on housing by bolt one, step
The output shaft of stepper motor forms gear pair by the gear axis connection on key one and driving gear, driving gear with driven gear,
Sleeve carries out axially position to driven gear, and driven gear is fixedly connected by key two with transmission shaft, convex with reeded dish type
Wheel is fixed on transmission shaft by key three, and transmission shaft is supported in housing by bearing, is arranged in disc cam groove circumferential uniformly distributed
Follower lever.
The structure of array-type flexible pressure sensing of the present invention probe is：Matrix is welded with temperature-insulating cover, and circuit board is fixed
At the top of temperature-insulating cover, conducting wire is connected with circuit board and Kapton respectively, and matrix annular sidewall, which is machined with, draws oilhole, draws oil
There is filtering plug at nose end mouth, the upper end of each power transmission protection contact is machined with annular slope, connects by sealing rubber ring and matrix
Connect, the upper surface for drawing oilhole with each power transmission protection contact communicates, and the fluid acting surface on the upper and lower surface of power transmission protection contact
Product is equal, is bonded in every pressing plate in the groove of body upper surface, Kapton is Nian Jie with above pressing plate, and pressure resistance type is hanged
Arm beam sensor array is embedded into flexible polyimide film, the upper end of elastic force-transmitting pole lower end and power transmission protection contact is Nian Jie,
Upper end is passed through every the hole wall of pressing plate, top and Kapton apical grafting.
The structure of piezoresistive cantilever beam sensor array of the present invention is：It is SiO above Si substrates2Dielectric base, pressure drag
Formula cantilever beam one end is connected with dielectric base, and pressure drag film is located above cantilever beam.
The stressed length of piezoresistive cantilever beam of the present invention is L2, a diameter of d of elastic force-transmitting pole, works as L2≈ 0.3d are clever at this time
Sensitivity reaches maximum.
The beneficial effects of the invention are as follows：
(1) decentralization of pressure sensing detection device of the invention with above carrying is realized by cable, relatively traditional lead stamp
By way of drill string or tubing string transport, have that the underground work cycle is short, efficient, to save time and cost of labor etc. excellent
Point.
(2) fish detection device Real-time Feedback underground fish position of the invention and shape, and PC control can be passed through
The contact condition of detection device and top of fish, it is possible to increase the precision of fish detection, compared with traditional lead stamp, array-type flexible pressure
Contact of the force snesor with top of fish is elastic deformation, it can be achieved that repeatedly printing, that is, reuse.
(3) present invention carries out contact measurement by array-type flexible pressure sensing probe with top of fish, is hanged using pressure resistance type
Arm beam sensor array, and embed it in the dielectric resilience film of polyimides, with respect to the contactless TV in underground, ultrasonic wave
For imaging, environment resistant medium and electromagnetic interference are strong, have high signal-to-noise ratio, can realize the fish detection of high accurancy and precision, reliably
Property it is high, and opposite ultrasonic probe is more efficient for detection point by point, and compact-sized, easy to operate, cost is low.
Brief description of the drawings
Fig. 1 is the structure diagram of the present invention；
Fig. 2 a are the structure diagrams of down-hole horizontal transmission mechanism of the present invention；
Fig. 2 b are the original state schematic diagrames of follower lever of the present invention；
Fig. 2 c are that the guiding of follower lever of the present invention fixes view；
Fig. 3 is the structure diagram of array-type flexible pressure sensing probe of the present invention；
Fig. 4 is the distribution schematic diagram of piezoresistive cantilever beam sensor array of the present invention；
Fig. 5 is the structure stress schematic diagram of piezoresistive cantilever beam sensing unit of the present invention；
Fig. 6 be sensitivity of the present invention with cantilever beam stressed length than graph of relation；
In figure：1st, array-type flexible pressure sensing is popped one's head in, and 101, power transmission protection contact, 102, sealing rubber ring, 103, base
Body, 104, filtering plug, 105, draw hydraulic fluid port, 106, elastic force-transmitting pole, 107, every pressing plate, 108, Kapton, 109, circuit
Plate, 110, piezoresistive cantilever beam sensor array, 1101, pressure drag film, 1102, piezoresistive cantilever beam, 1103, SiO2Insulate base
Bottom, 1104, Si substrates, 111, conducting wire, 112, temperature-insulating cover, 2, the vertical transmission mechanism in underground, 201, drive link, 202, linear motor
203rd, housing, 204, circuit, 3, down-hole horizontal transmission mechanism, 301, stepper motor, 302, bolt one, 303, key one, 304, main
Moving gear, 305, sleeve, 306, driven gear, 307, key two, 308, follower lever, 309, disc cam, 310, key three, 311, pass
Moving axis, 312, bearing, 4, attachment device, 401, bolt two, 402, bolt three, 403, caulking gum, 5, weight, 6, well logging electricity
Cable, 7, host computer, 8, underground fish, 9, casing.
Embodiment
As shown in Fig. 1 and Fig. 2 a~2c, a kind of underground fish detection method based on array-type flexible pressure sensor, bag
Include the following steps：
Step 1：Array-type flexible pressure sensing probe 1 is transferred to the top of fish 8 by logging cable 6；
Step 2：Driving Stepping Motor 301 drives disc cam transmission mechanism, uniformly distributed driven of controlled level face inner circumferential
308 radial motion of bar completes guiding and the fixation of detection device to 9 inner wall of casing；
Step 3：Linear motor 202 is driven to drive drive link 201, the axial direction of control array-type flexible pressure sensing probe 1
Movement, completes the contact that power transmission protection contact 101 is pushed up with fish, and underground power transmission protection is realized using oily passage and cavity structure is drawn
The inside and outside static pressure self-balancing of contact, and fish top contact displacement information is obtained by piezoresistive cantilever beam sensor array 110；
Step 4：The resistance variations signal that pressure drag film 1101 is gathered carries out conditioning conversion, supreme by cable transmission
Position machine 7, realizes the high accuracy imaging and identification of fish position and profile；
During transferring pressure sensing detection device in the step 1, when 1 contact of array-type flexible pressure sensing probe
Pushed up to fish, contact condition can transfer the progress that be hampered by the increase suddenly of imaging pressure data and cable for being transmitted to host computer
Judge, stop cable decentralization operation, then above carry 10~20cm of detection device；
In the step 2 by step motor control circumferentially be evenly distributed with follower lever radial stroke, righting housing, and by its
It is fixed on 9 inner wall of casing；Wherein driven boom end be hemispherical corrosion-and high-temp-resistant rubber, the curvature and internal surface of sleeve pipe of hemisphere
Curvature is consistent, to increase the contact area of driven boom end and internal surface of sleeve pipe, increases the friction of end and internal surface of sleeve pipe；
In the step 4：Real time imagery is detected to underground fish by software by host computer on well 7, it is more high-precision to obtain
The top of fish image-forming information of accuracy, can lift the contact velocity of detection device, adjustment array-type flexible pressure sensing probe and top of fish,
Secondary contact imaging is carried out, repeats aforesaid operations, until the error of the continuous fish position obtained three times and profile is in permission
Within scope, then it is compared with existing workover treatment correlation technique data, completes the identification of underground fish；
The output signal of piezoresistive cantilever beam is gathered, signal passes through the filtering of modulate circuit, after enhanced processing, carries out A/D
Conversion circuit module, then communication interface modules signal is transmitted on well by logging cable 6, be filtered amplification, finally
Host computer 7 is reached by communication interface, is filtered in Labview softwares by algorithm, is demarcated, interpolation fitting imaging.
As shown in Figure 1, a kind of underground fish detection device based on array-type flexible pressure sensor, 5 lower part of weight
It is connected by the transmission mechanism 2 vertical with underground of attachment device 4, the shell of down-hole horizontal transmission mechanism 3 and the vertical transmission mechanism 2 in underground
It is fixedly connected inside body 203, vertical 2 lower part of transmission mechanism in underground is connected with array-type flexible pressure sensing probe 1；Logging cable
6 are connected with 5 top of weight and pass through the vertical transmission mechanism 2 in underground to be connected with array-type flexible pressure sensing probe 1.
The structure of the vertical transmission mechanism 2 in underground is：Linear motor 202 is fixed in housing 203, linear motor 202
Output shaft is connected through a screw thread with drive link 201, end and 1 welding of array-type flexible pressure sensing probe of drive link 201, real
The axial movement of existing sensing probe；
The attachment device 4 includes bolt 2 401, bolt 3 402 and caulking gum 403, the bolt 2 401 of housing 203
It is attached, and is sealed with the caulking gum 403 of corrosion-and high-temp-resistant, weight 5 is fixed on housing by bolt 3 402
On 203, the geometry by designing weight 5 makes the center of gravity of pressure sensing detection device be in the 9 inner wall centre of gyration of casing
On axis, realize that detection device is smoothly transferred；
The structure of the down-hole horizontal transmission mechanism 3 is：Stepper motor 301 is fixed on housing 203 by bolt 1
On, the output shaft of stepper motor 301 by the gear axis connection on key 1 and driving gear 304, driving gear 304 with from
Moving gear 306 forms gear pair, and sleeve 305 carries out driven gear axially position, and driven gear 306 is by key 2 307 with passing
Moving axis 311 is fixedly connected, and is fixed on reeded disc cam 309 by key 3 310 on transmission shaft 311, transmission shaft 311 by
Bearing 312 is supported in housing, and circumferentially uniformly distributed follower lever 308 is arranged in 309 groove of disc cam；
As shown in Figure 2 a, in down-hole horizontal transmission mechanism 3, stepper motor 301 drives dish type with groove by gear pair
Cam 309, and then circumferentially uniformly distributed 308 radial motion of follower lever is driven, one end of follower lever 308 is stuck in disc cam 309
In groove, the other end is enclosed with the rubber of corrosion-and high-temp-resistant；As shown in figs. 2 b and 2 c, controlled by stepper motor 301 driven
Two kinds of location status of bar 308, when follower lever 308 from original state move to be oriented to stationary state (centre of gyration of cam is most
At a distance), the righting for completing sensor measuring device is fixed.
As shown in figure 3, the structure of array-type flexible pressure sensing probe 1 is：Matrix 103 is welded with temperature-insulating cover 112, circuit
Plate 109 is fixed on the top of temperature-insulating cover 112, and conducting wire 111 is connected with circuit board 109 and Kapton 108 respectively, matrix 103
Annular sidewall, which is machined with, draws oilhole 105, and drawing at 105 port of oilhole has filtering plug 104, filters the suspended impurity of oil well inner fluid,
Avoid inner passage from blocking, the upper end of each power transmission protection contact 101 is machined with annular slope, by sealing rubber ring 102 with
Matrix 103 connects, ensure power transmission protection contact 101 in the cavity wall vertical direction move and do not fall off, draw oilhole 105 with it is each
The upper surface of a power transmission protection contact 101 communicates, and the oil effect area on 101 upper and lower surface of power transmission protection contact is equal, real
The inside and outside self-balancing for remaining quiet oil pressure of array-type flexible pressure sensing probe 1, avoids underground in present decentralization process
The influence that the quiet oil pressure of fluid brings sensor measurement so that detection device steady operation, detection data are reliable；Every pressure
Plate 107 is bonded in the groove of 103 upper surface of matrix, and Kapton 108 is Nian Jie with above pressing plate 107, every pressing plate 107
On the one hand oil liquid pressure can be prevented to be delivered in piezoresistive cantilever beam sensor array 110, on the other hand may be such that and act on power transmission
The overload power of contact 101 is protected, to realize the antioverloading function of sensor, to make sensor by being delivered to matrix every pressing plate 107
Reliable operation；Piezoresistive cantilever beam sensor array 110 is embedded into flexible polyimide film 108, to optimize sensor
Soft elastic and mechanical performance；Elastic 106 lower end of force-transmitting pole is Nian Jie with the upper end of power transmission protection contact 101, upper end is passed through every pressing plate
107 108 apical grafting of hole wall, top and Kapton, realizes the power of underground top of fish and piezoresistive cantilever beam sensor array 110
Transmit, elastic force-transmitting pole 106 can not only play certain cushioning effect, moreover it is possible to realize the flexible to adapt to top of fish of sensor
Non-smooth surface,
The structure of the piezoresistive cantilever beam sensor array 110 is：The top of Si substrates 1104 is SiO2Dielectric base 1103,
1102 one end of piezoresistive cantilever beam is connected with dielectric base 1103, and pressure drag film 1101 is located at the top of cantilever beam 1102,
As shown in figure 4, piezoresistive cantilever beam sensor array 110 utilizes micro-system processing technology MEMS in heat safe insulation
It is process on body silicon (SOI) substrate, the mechanical electrology characteristic for having possessed sensor array, and each piezoresistive cantilever beam 1102
Central axes and the centre of gyration line for drawing hydraulic fluid port 105 are in 45 degree of angles, to increase the spatial resolution of sensor array, meanwhile, this hair
The bright prior art data according to underground fish, on the premise of ensuring that small articles fish equally has high detection accuracy, design
The spatial resolution of piezoresistive cantilever beam sensor array is 5mm；
Stress (elastic force-transmitting pole 106 acts on) length of the piezoresistive cantilever beam 1102 is L2, elastic force-transmitting pole 106
A diameter of d, works as L2≈ 0.3d, the sensitivity behaviour sensed at this time reach maximum.
As shown in figure 5, after power transmission protection contact 101 contacts top of fish, 106 compression of elastic force-transmitting pole first, next bullet
Power is passed to the end of piezoresistive cantilever beam structure by property force-transmitting pole 106, and piezoresistive cantilever beam 1102 passes through SiO2Dielectric base
1103 and Si substrates 1104 are fixed on every on pressing plate 107, are become finally by the resistance value of pressure drag film 1101 in piezoresistive cantilever beam
Rate obtains fish shape and positional information, establishes the vertical displacement of power transmission protection contact 101 (due to contacting band with fish surface
Come) relational expression of resistance change rate that is exported with pressure drag film 1101, specific calculation formula has：
Due to E2>>E3,E2For the Young's modulus (200Gpa) of piezoresistive cantilever beam 1102, E3For Kapton 108
Young's modulus (3-4Gpa), therefore can regard as and the directed force F of elastic force-transmitting pole 106 is applied to pressure drag entirely with uniform load q
1102 end of formula cantilever beam；In formula, h, △ z1,d,E1The height of respectively elastic force-transmitting pole 106, deformation quantity, diameter, Young mould
Amount；L2For 1102 stressed length of cantilever beam structure；
Piezoresistive cantilever beam 1102 is subject to the uniform load Bending Moment Equations M (x) to be：
Act on the equivalent bending moment M of pressure drag film 1101e：
The surface stress σ of pressure drag film 1101：
In formula, L, w, t is respectively the length of cantilever beam structure 1102, width, thickness；L1For the length of pressure drag film 1101
Degree, wherein L=L1+L2, I is the moment of inertia of cantilever beam structure 1102,
By the line of deflection approximate equation of girder construction：
As 0≤x≤L-L2When, 1102 equations of rotating angle θ of piezoresistive cantilever beam1(x), deflection equation v1(x)：
Work as L-L2During≤x≤L, 1102 equations of rotating angle θ of piezoresistive cantilever beam1(x), deflection equation v1(x)：
In formula, E2For the Young's modulus of piezoresistive cantilever beam 1102, x is with a distance from cantilever beam fixing end；
By boundary condition：
v1(0)=0, θ1(0)=0, v1(L-L2)=v2(L-L2), θ1(L-L2)=θ2(L-L2)；
Constant C can be obtained1, D1, C2, D2：
C1=0, D1=0；
In formula, △ z2For the amount of deflection of 1102 end of piezoresistive cantilever beam, klFor the equivalent of 1102 right part of piezoresistive cantilever beam
Rigidity, because having：
In formula, △ z are the global displacement of sensor vertical direction caused by top of fish shape；
The sensitivity s that can obtain the sensor is：
In formula, μ, ε, λ is respectively the horizontal Poisson's ratio of pressure drag film, longitudinal strain, piezoresistance coefficient；△ R, R are respectively to press
The resistance change that resistance film 1101 is brought by top of fish shape, resistance initial value.
It can be optimized by the parameter in transducer sensitivity S expression formulas and realize that transducer sensitivity maximizes；Wherein,
In the present embodiment, parameter value is determined：
E1=2GPa, E2=200GPa, d=5mm, t=0.8mm, L1=1mm,
W=2mm, h=12mm；
Optimal Parameters L2, curve as shown in Figure 6 is obtained, abscissa is in figureOrdinate is the sensitivity of sensor
The trend of first increases and then decreases is presented in S, the sensitivity of sensor, can obtainWhen, the sensitivity of sensor reaches most
Greatly, therefore piezoresistive cantilever beam 1102 is taken by 0.3 times that the loaded length of elastic force-transmitting pole is elastic power transmission column diameter.
Claims (10)
1. a kind of underground fish detection method based on array-type flexible pressure sensor, it is characterised in that comprise the following steps：
Step 1：Array-type flexible pressure sensing is transferred by logging cable to pop one's head in above fish；
Step 2：Driving Stepping Motor drives disc cam transmission mechanism, and the uniformly distributed follower lever of controlled level face inner circumferential is radially
Internal surface of sleeve pipe is moved to, completes guiding and the fixation of detection device；
Step 3：Linear motor is driven to drive drive link, the axial movement of control array-type flexible pressure sensing probe, completes to pass
Contact of shield of the trying hard to keep contact with top of fish, the inside and outside static pressure of underground power transmission protection contact is realized certainly using oily passage and cavity structure is drawn
Balance, and top of fish contact displacement information is obtained by piezoresistive cantilever beam sensor array；
Step 4：The resistance variations signal that pressure drag film is gathered carries out conditioning conversion, by cable transmission to host computer, realizes
Fish position and the high accuracy imaging and identification of profile.
2. the underground fish detection method according to claim 1 based on array-type flexible pressure sensor, its feature exist
In：During pressure sensing detection device being transferred in the step 1, when array-type flexible pressure sensing probe contacts to top of fish,
Contact condition can be hampered by the increase suddenly of imaging pressure data and cable decentralization for being transmitted to host computer and be judged, be stopped
Cable transfers operation, then above carries 10~20cm of detection device.
3. the underground fish detection method according to claim 1 based on array-type flexible pressure sensor, its feature exist
In：The radial stroke of follower lever, righting housing are circumferentially evenly distributed with the step 2 by step motor control, and is fixed in
Internal surface of sleeve pipe；Wherein driven boom end is the rubber of hemispherical corrosion-and high-temp-resistant, the curvature of hemisphere and internal surface of sleeve pipe curvature one
Cause, to increase the contact area of driven boom end and internal surface of sleeve pipe, increase the friction of end and internal surface of sleeve pipe.
4. the underground fish detection method according to claim 1 based on array-type flexible pressure sensor, its feature exist
In in the step 4：Real time imagery is detected to underground fish by software by host computer on well, to obtain more high accurancy and precision
Top of fish image-forming information, can lift detection device, the contact velocity of adjustment array-type flexible pressure sensing probe and top of fish, carries out two
Secondary contact imaging, repeats aforesaid operations, until the error of the continuous fish position obtained three times and profile permission scope with
It is interior, then it is compared with existing workover treatment correlation technique data, completes the identification of underground fish.
A kind of 5. underground fish detection device based on array-type flexible pressure sensor, it is characterised in that：Weight lower part leads to
Cross attachment device to be connected with the vertical transmission mechanism in underground, the enclosure interior of down-hole horizontal transmission mechanism and the vertical transmission mechanism in underground
It is fixedly connected, the vertical transmission mechanism lower part in underground is connected with array-type flexible pressure sensing probe；On logging cable and weight
Portion connects and passes through the vertical transmission mechanism in underground to pop one's head in array-type flexible pressure sensing and connects.
6. a kind of underground fish detection device based on array-type flexible pressure sensor according to claim 5, it is special
Sign is：The structure of the vertical transmission mechanism in underground is：Linear motor is fixed in housing, linear motor output shaft and transmission
Bar is connected through a screw thread, and end and the array-type flexible pressure sensing probe of drive link weld.
7. a kind of underground fish detection device based on array-type flexible pressure sensor according to claim 5, it is special
Sign is：The structure of the down-hole horizontal transmission mechanism is：Stepper motor is fixed on housing by bolt one, stepper motor
For output shaft by the gear axis connection on key one and driving gear, driving gear and driven gear form gear pair, sleeve to from
Moving gear carries out axially position, and driven gear is fixedly connected by key two with transmission shaft, passes through key with reeded disc cam
Three are fixed on transmission shaft, and transmission shaft is supported in housing by bearing, and circumferentially uniformly distributed follower lever is arranged in disc cam groove.
8. a kind of underground fish detection device based on array-type flexible pressure sensor according to claim 5, it is special
Sign is：The structure of array-type flexible pressure sensing probe is：Matrix is welded with temperature-insulating cover, and circuit board is fixed on temperature-insulating cover
Top, conducting wire are connected with circuit board and Kapton respectively, and matrix annular sidewall, which is machined with, draws oilhole, draws at oilhole port
There is filtering plug, the upper end of each power transmission protection contact is machined with annular slope, is connected by sealing rubber ring with matrix, draws oilhole
Communicated with the upper surface of each power transmission protection contact, and the oil effect area on the upper and lower surface of power transmission protection contact is equal, every
Pressing plate is bonded in the groove of body upper surface, and Kapton is Nian Jie with above pressing plate, and piezoresistive cantilever beam is sensed
Array is embedded into flexible polyimide film, and elastic force-transmitting pole lower end is Nian Jie with the upper end of power transmission protection contact, upper end passes through
Every the hole wall of pressing plate, top and Kapton apical grafting.
9. a kind of underground fish detection device based on array-type flexible pressure sensor according to claim 8, it is special
Sign is：The structure of the piezoresistive cantilever beam sensor array is：It is SiO above Si substrates2Dielectric base, piezoresistive cantilever beam
One end is connected with dielectric base, and pressure drag film is located above cantilever beam.
10. a kind of underground fish detection device based on array-type flexible pressure sensor according to claim 9, it is special
Sign is that the stressed length of piezoresistive cantilever beam is L2, a diameter of d of elastic force-transmitting pole, works as L2≈ 0.3d, at this time sensitivity reach
To maximum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711428539.7A CN107916922B (en) | 2017-12-25 | 2017-12-25 | Underground fish detection method and device based on flexible array type pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711428539.7A CN107916922B (en) | 2017-12-25 | 2017-12-25 | Underground fish detection method and device based on flexible array type pressure sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107916922A true CN107916922A (en) | 2018-04-17 |
| CN107916922B CN107916922B (en) | 2023-05-02 |
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| CN112255701A (en) * | 2020-10-09 | 2021-01-22 | 中国石油天然气集团有限公司 | Multi-contact underground falling object imaging method and device, electronic equipment and storage medium |
| CN113107409A (en) * | 2021-05-13 | 2021-07-13 | 中煤科工集团西安研究院有限公司 | Visual guide type centralizing type drilling tool fishing device and method |
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